Farmville, Virginia CHILLED WATER MASTER PLAN...Farmville, Virginia CHILLED WATER MASTER PLAN Final Report January 3, 2012 Submitted by: Affiliated Engineers, Inc. 1414 Raleigh Road,

Farmville, Virginia CHILLED WATER MASTER PLAN Final Report January 3, 2012

Submitted by: Affiliated Engineers, Inc. 1414 Raleigh Road, Suite 305 Chapel Hill, NC 27517 (919) 419-9802

AEI Project No. 09624-00

Longwood University Chilled Water Master Plan AEI Project N. 09624-00

Table of Contents

Page Number

A. Executive Summary .............................................................................................................................................. 2

B. Existing Conditions ............................................................................................................................................... 4

C. Projected Loads .................................................................................................................................................... 5

D. Central Chilled Water Plant Options and Recommendations ............................................................................... 8

E. Recommended Chiller Plant Configuration ......................................................................................................... 15

F. Recommended Option ........................................................................................................................................ 16

G. Implementation Strategy for Selected Option and Cost Projections ................................................................... 16

H. Appendix A - Existing Equipment ....................................................................................................................... 25

I. Appendix B - Campus Load Maps ...................................................................................................................... 26

J. Appendix C - Option 2 - Chiller Plants and Distribution Routing ........................................................................ 27

K. Appendix D - Temporary Chiller, Building Connection P&ID .............................................................................. 28


A. Executive Summary

Cooling for existing buildings on the Longwood campus is provided by air cooled and water cooled chillers with some buildings being served by direct expansion type cooling systems. The majority of the direct expansion systems are small residential sized systems where in some cases multiple units serve a single building. As all of these systems reach their life expectancy or the buildings are renovated, it is desired that the buildings cooling needs be served by a central chilled water system. The north portion of campus is mainly served by building chillers where one chiller serves its respective building. In some cases a single chiller may serve multiple buildings and in some cases two chillers are installed for redundancy but the systems vary building to building. Most of the chillers on north campus have a life expectancy which will allow the systematic conversion of the buildings to a central system over time. The majority of campus growth is expected to be in south campus which affords the most opportunity for beginning to establish buildings which are easily converted to a central chilled water system. Since the existing old steam plant will be available for renovation in 2019, the focus is to convert the existing old steam plant to the north chiller plant as soon as possible. In order to centralize and optimize chilled water production, three options were considered:

Option 1 - Single central plant in central campus that would serve all of campus.

Option 2 - Two plants (north and south) with the first plant being the repurposing of the existing old steam plant in 2019 and delay construction of a south campus plant until 2022

Option 3 - Two plants (north and south) with new construction in south campus in 2019 and repurpose of the existing old steam plant to chilled water production in 2019

Since a single central plant would require a large allocation of space in central campus, result in a larger more extensive chilled water distribution system and not utilize the existing old steam plant, this option was not recommended for implementation or analyzed in detail. Options 2 and 3 both achieve the same end result with 7,200 tons of cooling capacity installed in south campus and 2,400 tons of cooling capacity installed in north campus with both plants interconnected by the distribution system. Option 2 was selected as the recommended option due to the fact that while both Options 2 and 3 achieve the same end result, Option 2 affords delay of new construction on south campus until funding can be established and repurpose of the existing old steam plant is complete. In either option a significant amount of distribution piping must be installed on campus to interconnect buildings and the central plants. Drawings M-1.2 and M-1.3 in the appendices outline the preliminary routing and sizes of the piping required for the system. Prior to construction of any portion of the distribution piping, specific routing which accounts for existing and future utilities must be established for all portions of campus. The cost estimate below utilizes the routing shown on M-1.2 and M-1.3 with an estimating contingency to allow for variations of the routing. It should be noted that for both Options 2 and 3 the cost is the same. The difference is that Option 2 delays a portion of the distribution and cost for the south plant until 2022. There may be some cost avoidance with Option 3 with respect to temporary chillers, however, that cost is insignificant when compared to the overall scope. All cost estimates in the executive summary and in section G are in 2012 dollars and should be escalated for the year being constructed. Costs below are for construction only and do not include design fees or Longwood internal costs for project management. Section G and M-1.2 and M-1.3 detail


the year by year construction that must occur to convert the campus to a central chilled water system. The following summarizes the amounts required for construction for each calendar year. Option 2 Cost Analysis Calendar Year Funding Requirement2012 880,000$ 2013 2014 2,159,300$ 2015 2016 1,655,500$ 2017 165,000$ 2018 2,101,000$ 2019 12,423,400$ 2020 2021 2022 23,120,900$ Beyond 2022 10,002,300$ Total 52,507,400$ Utilizing Option 2 and with funding indicated above, the Longwood campus will operate on a central chilled water system with two chiller plants and one redundant chiller for the entire campus. All building chillers and temporary chillers are removed from the campus buildings by 2025. During winter months, one plant will serve the chilled water loads of campus which will allow maintenance in the second plant. The central system will provide a greater efficiency than individual building chillers and reduce long term maintenance costs by centrally locating chilled water production into larger more industrial pieces of equipment and removing multiple pieces of unitary equipment from each building.


B. Existing Conditions

The majority of buildings on campus are served by DX type cooling systems, air cooled chillers or water cooled chillers. Of those buildings having chillers, air cooled or water cooled, only 6 of the 25 are equipped with redundant capacity in the event of a chiller failure. Buildings with water cooled chillers rely on either one or two crossflow type cooling towers for condenser cooling. The majority of cooling towers are located on the roofs of buildings with some being located at grade adjacent to the building. Buildings with air cooled chillers have chillers with multiple compressors for redundancy and turndown and units are typically installed at the ground level although in some instances, air cooled chillers are roof mounted. There is currently no chilled water distribution on campus that links buildings together to accomplish redundancy. All chilled water piping is local to each building with the exceptions of Blackwell which serves Grainger and Ruffner, Bedford which serves Wygal, the Dining Hall which serves Iler and McCorkle which serves Jeffers and Stevens. The Blackwell, Grainger and Ruffner buildings are served by a single 350 ton water cooled chiller located in the Blackwell mechanical room. Pumping for Grainger and Ruffner occurs in the Blackwell mechanical room. For service of Bedford and Wygal, water cooled chillers are located at Bedford and pumping in the Bedford mechanical room serves both Bedford and Wygal. The chilled water capacity at Bedford is a combination of new chiller, relocated chiller and new pumping and new towers which were installed with the Bedford Addition. The Dorrill Dining Hall has a water cooled chiller, however, primary cooling and heating is performed by a distributed DX ground source heat pump system with a bore field east of the building. The ground source system was not operating at rated capacity and has been disconnected. A project is underway to convert operation of the heat pumps to utilize the existing cooling tower through use of a heat exchanger. A single multi compressor chiller is located in McCorkle with pumping for Jeffers and Stevens being located in the McCorkle mechanical room. The chiller is served by a single cooling tower and redundancy is accomplished by the multi-compressor design of the water cooled chiller. Building pumping systems vary with a mixture of primary / secondary with two and three way valves or variable primary with variable pumping and two way valves. ARC, Curry and Frazer are configured as a two pipe change over systems with the building heating hot water and chilled water systems sharing the building distribution piping. Air handling units are configured with a single water coil which provides both heating and cooling. Connection of these buildings to a central system would require the use of heat exchangers to decouple the building system from the two pipe system unless the buildings are completely renovated and a four pipe system is installed. A comprehensive list of equipment, capacities and pumping arrangement is provided in Appendix A for each of the buildings which operate on existing chilled water systems.


C. Projected Loads

The purpose of developing the projected loads is to develop chilled water demand projections which are used in planning the necessary chilled water infrastructure to serve the campus load growth through the year 2030. Drawings M-1.0 and M-1.1 in Appendix B illustrate the planned or potential building expansions during the planning period. The loads were estimated using square footage and building use information provided by Longwood. The load densities are based on AEI historical data from similar institutions and cross referenced to the data received from Longwood. Diversity factors were varied based on the number of buildings being connected to two central plants. The load density and diversities are listed below in Table C-1.

Gross DiversifiedBuilding Type SF/Ton Diversity SF/TonAgricultural/Greenhouse 450 0.80 563Animal / Veterinary 180 0.94 193Auditorium 250 0.90 278Classroom 320 0.87 370Food Service 200 0.80 250Gymnasium 450 0.80 563Gymnasium w/ Spectators 350 0.85 412Hotel 360 0.85 426Light Laboratory 290 0.88 330Medium Laboratory 190 0.93 204Heavy Laboratory 90 0.98 92Library 350 0.85 412Office 340 0.86 398Residence Hall 360 0.85 426Service/Grounds Facility 400 0.83 485Sports Training 250 0.90 278Sports Arena 200 0.50 400Sports Arena - Outdoor 200 0.50 400Student Center/Union 270 0.89 303

TABLE C-1 LOAD AND DIVERSITY FACTORS BY BUILDING TYPE

Chilled Water Density


Utilizing the building information provided by Longwood in conjunction with the application of the above diversity factors, a comprehensive building load profile was developed as indicated in Table C-2 below. Those buildings which are shaded and have no associated chilled water load and are considered impractical to connect to the central system and therefore are not included in the analysis.

Table C-2

Chilled Water Loads for Campus Buildings

Renovation Type of # of Gross A/C Building Plant or new

Building # Building Name Use Floors Area Sq. Ft. Date Peak Load Diversified Loads End of Current ConstructionSq. Ft. Built (Tons) (Tons) Chiller Life Dates

Auxiliary Buildings69 ARC Dorm 4 47,548 47,548 1992 132 112 2012 R 202033 Alumni House Lodging 3 0 0 1880 0 05 Barber House (Gate House) Temp. housing 1 0 0 1910 0 0

88 Brock Commons & Garage Plaza and Garage 2 0 0 090 Center for Health & Fitness Recreation 3 74,683 74,683 2007 299 269 2022 R 2020+27 Club House Pro Shop 1 0 0 1930 0 09 Cox Dormitory Dorm 5 44,888 44,888 1962 125 105 2023 R 2020+

11 Main Cunningham Dorm 4 29,827 29,827 1932 83 0 Demolish 2009-201213 North Cunningham Dorm 4 42,975 42,975 1928 119 0 Demolish 2009-201212 South Cunningham Dorm 4 47,081 47,081 1958 131 0 Demolish 2009-201248 Curry Dorm 11 107,424 107,424 1969 298 0 2017 Demolish 2020+76 Dorrill Dining Hall Dining Hall 2 60,171 60,171 2000 301 241 2022 R 2020+4 Field House Storage 1 821 821 1940 2 0 Demolish 2011-2013

60 Frazer Dorm 11 103,990 103,990 1970 289 0 2013 Demolish 2020+43 French (University Technology Center) Dorm/swim 5 42,324 42,324 1923 118 99 No Chiller R 201242 Lankford Student Union 2 35,273 35,273 1967 131 116 2018 Addition 2014 (see new bldgs)26 Log Cabin Meetings 1 0 0 1940 0 028 Longwood House Private residence 4 0 0 1850 0 029 Longwood House Garage Private residence 1 0 0 1850 0 073 506 Race Street House Temp. housing 1 0 0 1954 0 071 509 Pine Street House Offices 1 0 0 1954 0 062 605 Race Street House Temp. housing 1 0 0 1955 0 087 607 Race Street House Temp. housing 1 0 0 0 031 South Ruffner Dorm 4 16,040 16,040 1900 45 38 2011 R 201663 Storage Barn (Golf Course) Storage 1 0 0 1965 0 079 Storage - Lancer Tennis CT Storage 1 0 0 1999 0 041 Stubbs Dorm 4 57,984 57,984 1966 161 136 No Chiller Partial R 2011-2013, R 2017-2020

45 Main Tabb New & Old Dorm 4 38,019 38,01919261951 106 89 No Chiller R 2020

22 South Tabb Dorm 3 9,817 9,817 1912 27 23 No Chiller R 202046 Wheeler Dorm 4 45,978 45,978 1960 128 108 2027 R 2020+95 Baseball Field Complex Field House 1 0 0 2008 0 097 Johnson Drive Com. Field House 1 0 0 2008 0 0

94A The Landings NE Dorm 3 0 0 2005 0 0 Long term possible connection94B The Landings NW Dorm 3 0 0 2005 0 0 Long term possible connection94C The Landings SE Dorm 3 0 0 2005 0 0 Long term possible connection94D The Landings SW Dorm 3 0 0 2005 0 0 Long term possible connection93 Longwood Village Dorm 0 0 0 092 Stanley Park/Lancer Park Dorm 2&3 0 0 0 0

Total for category 804,843


E & G Buildings30 Barlow Office 2 5,994 5,994 1915 0 0 Demolish 201656 Bedford Classrooms/offices 2 26,242 26,242 1971 82 71 2030 R/NC 2009-201256 Bedford Addition Classrooms/offices 2 48,620 48,620 2010 152 131 203061 Bristow Offices/warehouse 2 18,417 18,417 1972 0 0 Demolish 201666 Clark House [SBDC] Offices 2 0 0 0 0

91Communication Studies Theatre Arts Building

Classrooms/Offices/Auditorium 3 41,983 41,983 2009 168 151 2024 R 2020+

58 Coyner Offices 3 18,300 18,300 1972 54 46 2005 R 201819 Craft House Offices 2 0 0 1960 0 083 Grainger Classrooms/offices 4 27,712 27,712 2003 87 75 No Chiller R 2020+16 Greenhouse Greenhouse 1 0 0 1968 0 032 Heating Plant Heating plant 1 4,390 4,390 1938 11 9 No Chiller R 201917 Hiner Classrooms/offices 3 36,869 36,869 1909 115 100 2013 R 2020+70 Hull Classrooms/offices 2 29,063 29,063 1996 91 79 2016 R 2017-202020 Iler Gym/offices 2 9,903 9,903 1962 40 36 No Chiller R 2020+

23 JarmanClassrooms/officesauditorium 3 26,555 26,555 1951 83 72 2030 R 2020+

25 Lancaster Offices 3 45,671 45,67119381960 134 115 2015 R 2020+

67 LDC 505 Pine St. Offices 1 0 0 1955 0 065 Library Library 3 70,890 70,890 1990 203 172 2010/2026 R/NC 2016 (see new bldgs)47 McCorkle & Jeffers Classrooms/offices 1 17,653 17,653 1968 55 48 2030 R 2020+

81 Chichester Science BuildingClassrooms/OfficesLabs 4 71,804 71,804 2005 500 440 2025 R 2020+

84,85,86 New Ruffner (Main/East/West) Classroom/Offices 4 80,926 80,926 2005 253 219 No Chiller R 2020+39 Stevens Classrooms/offices 3 32,916 32,916 1951 103 89 No Chiller R 2009-2014N/A Storage Shed ( Sawdust) Storage 1 0 0 1954 0 077 Vernon Street Warehouse Warehouse 1 0 0 0 057 Wygal Classrooms/offices 2 24,961 24,961 1971 78 67 No Chiller R 2017


E & G & Auxiliary Buildings14 Blackwell Meeting 3 48,448 48,448 1920 151 131 2025 R 2008-2014

40 Graham Offices/medical 1 12,843 12,843 1962 44 39 No chiller R 2017-2020

64 WillettGym/officesclassrooms 2 73,238 73,238 1981 229 198 2026 R 2020+

64 Willett Addition Rehab/ Offices 1 2,972 2,972 2007 10 9 No chiller R 2020+78 Hardy House Offices 3 0 0 0 074 Hazardous Storage Shed Storage 1 0 0 1997 0 0


Misc Buildings72 CEC South Boston Classrooms/offices 2 0 0 0 096 Visual Arts Center Exhibition/offices 2 0 0 0 098 Athletic Complex Unit 1 Offices 1 0 0 N/A 0 099 Athletic Complex Unit 2 Offices 1 0 0 N/A 0 0100 Athletic Complex Unit 3 Offices 1 0 0 N/A 0 0

House/Archeological Field School Classrooms/offices 1 0 0 0 080 South Boston Teacher Inst. Classrooms/offices 1 0 0 0 072 RMA Classrooms/offices 1 0 0 0 075 LCCLL Classrooms/offices 1 0 0 0 089 Tobacco Warehouse Storage 1 0 0 0 0

Total for category 0

Existing Total (GSF) 1,581,213 5,136 3,631

Future Buildings through 2022New Student Union Student Union 80,000 80,000 296 264 2012Student Success Center (Lankford Addn) Classrooms/offices 25,000 25,000 78 68 2014Admissions Office Offices 17,000 17,000 50 43 2014Willett Addition Classrooms/offices 21,000 21,000 66 57 Not scheduled through 2022Public Safety and University Services Offices 30,000 30,000 88 75 2016Lankford Addition/Library Expansion Classrooms/offices 31,248 31,248 98 84 2016Performing Arts Theater Auditorium 44,333 44,333 177 160 2016Hull Annex Building Classrooms/offices 22,500 22,500 70 61 2018Quad 1 Unit B Residence 45,000 45,000 125 106 2018Quad 1 Unit C Residence 45,000 45,000 125 106 2018Multipurpose Center (Convocation Center) Autitorium 86,000 86,000 344 310 2018Northeast Academic Building Classrooms/offices 32,000 32,000 100 87 2020Aquatics Building (Natatorium) Sports/Training 45,000 45,000 180 162 2022Curry Frazier Replacement Residence 210,000 210,000 583 493 2022

Total Through 2022 734,081 2,381 2,073

Future Buildings Beyond 20227 Residence Halls Residence 400,000 400,000 1,111 939 >2022Dining Facility Food Service 45,000 45,000 225 180 >2022Student Activity Facility Classrroms/Offices 55,000 55,000 172 149 >2022Recreation and Fitness Facility Sports/Training 50,000 50,000 200 180 >20223 Academic Buildings Classrroms/Offices/Lab 185,000 185,000 638 561 >2022Library Library 75,000 75,000 214 182 >2022

Total Beyond 2022 810,000 810,000 2,560 2,191

Grand Total (GSF) 3,125,294 10,077 7,900


The projected campus peak load in diversified tons including future growth is 7,900Tons. Using this load as a basis and including an N+1 chiller for the campus, options will be investigated to serve the campus loads through 2030. Graph C-1 below is a graphical representation of the campus loads through 2030. The load assumes the requirement for central chilled water capacity when existing building equipment has reached the estimated end of its useful life and accounts for new loads from building renovations and new construction.

D. Central Chilled Water Plant Options and Recommendations

The development of a centralized chilled water systems will:

Reduce energy cost by ensuring all chilled water is generated with water cooled chillers and encouraging energy conservation strategies such as variable speed chillers and pumping.

Centralize equipment for maintenance with plants designed around the equipment with available space for maintenance.

Greatly lower maintenance cost by reducing the number of pieces of equipment in the system and allowing Longwood University to invest in higher quality equipment.

Enhance campus aesthetics by eventually eliminating air cooled chillers and cooling towers at each of the buildings which reduces visual and noise impacts.

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Graph C‐1Campus Load vs Calender Year


Begin the planning effort to phase out of HCFC refrigerants (R-22, R-123 and some blends of R-22 which may include R-410A), which have a current phase-out date of 2020.

The development of a centralized chilled water systems is a significant endeavor with respect to cost, planning and commitment. In the case of Longwood University, there is the added desire to repurpose the old steam plant which has recently been replaced with a new facility but will remain active until 2019. The old steam plant has provided steam to the campus for just over 70 years. The new biomass steam plant, built immediately next to the old plant, provides the main source of steam to the campus with the old steam plant remaining in use to serve peak loads. The old steam plant footprint is too small for an academic building or student housing; however, the location and size are a good match for a chilled water plant. The three options for central chilled water production to serve loads in Graph C-1 in section C are:

Option 1 - Single central plant

Option 2 - Two plants (north and south) with the repurpose of the existing steam plant in 2019 and construction of a new central plant on south campus in 2022

Option 3 - Two plants (north and south) with the repurpose of the existing steam plant in 2019 and concurrent construction of a new central plant on south campus in 2019

Refer to M-1-2 and M-1.3 in Appendix C for the location of the regional plants and distribution piping for Options 2 and 3. In both Options 2 and 3, the north and south plants are 2,400 tons and 7,200 tons respectively with the plants being interconnected to work as a virtual single central plant. The advantages of interconnecting the plants are shared redundancy with one chiller in either plant maintaining N+1 redundancy for the entire campus, the ability to operate a single plant when the demand is low and the ability to shutdown either plant in the winter for extended maintenance. As shown in Appendix C, the location of the north and south regional plants are relatively fixed. The old steam plant serves as the north plant while a new facility on south campus serves as the south plant. Since the old steam plant is to remain active until 2019, the critical planning element is to define when to begin construction of distribution piping and when the south plant should be constructed. In reviewing the current campus as well as future campus development, following recommendations for central chilled water production are made: 1. The distribution system for the north plant should begin construction as soon as possible with new loads being served by central air cooled chillers. An investigation was made into connection of existing buildings with chillers as a virtual plant as described in section G but is not recommended. As chillers fail, buildings should be connected to the central distribution system and temporary cooling until new capacity is installed at the old steam plant. 2. The existing old steam plant should be developed in 2019 for the following reasons:

Conversion of the plant will begin the establishment of a central chilled water system without the capital required for new building on north campus.

Most of the loads on the north end of campus are served by chillers without redundancy that should provide reliable service until 2020 or slightly beyond. While some chillers may require replacement in the next 8 to 9 years, most should not. Longwood University has already invested in this equipment and to the extent possible, this equipment should be used through its service life to maximize the investment. Extending distribution piping from the repurposed north plant to buildings such as Blackwell, French and South Ruffner will provide an option for connection in the event of a chiller failure or a connection which is isolated from the distribution


for quick change over to the central system. Due to the cost of pumping, valving and controls upgrades, interconnection of the building system with, and operation in conjunction with a central system is not recommended.

The chiller at Coyner is operating several years beyond its estimated useful life. Extension of new chilled water service to Coyner will advert emergency cooling requirements at the building if the existing chiller fails. Coyner is not configured with redundant production capacity. Several other buildings on north campus will have chillers in operation beyond their expected life and should be connected to the north plant immediately once the north plant is operational.

New loads requiring temporary cooling such as the French renovation and the Student Union which replaces the Cunningham Dorms may be connected to the central system and temporary equipment removed. There is the potential that temporary equipment removed from these buildings may be repurposed elsewhere on campus as described in the implementation plan.

2. The south plant should be developed as soon as possible following the conversion of the old steam plant for following reasons:

Constructing a south regional plant will allow Longwood University to connect new and future

buildings to a central plant and avoid capital costs for unitary equipment at each building. In addition, centralized equipment with redundancy will prevent the requirement to build redundancy into unitary chilled water production equipment for each building.

Construction of a south regional plant will immediately fix a location which is suitable for a central plant and accommodate a future plant expansion. At 7,200 tons of capacity, approximately 14,000 square feet will ultimately be required not including any additional shop space which may be desired. Allocating the space as early as possible will be much easier than finding space in the future once multiple buildings are constructed and south campus begins to build out.

Construction of a south regional plant will prevent continued installation of temporary and unitary equipment at buildings. A new south plant will allow all less efficient temporary equipment at buildings to be removed. The connection of the distribution system from the south plant to the north plant will provide campus wide redundancy.

Option 1 - Single Plant, Central Campus: The single plant option would consist of one chilled water production facility located in central campus near Lankford with a capacity of 9,600 tons. The plant would include 30" chilled water supply and return mains heading south and 24" mains headed north from the plant. The obvious advantage to a single plant is the ability to locate all of the chilled water production equipment in a single integrated location which could include any emergency power systems that service the chiller plant. However, this approach fails to redevelop the existing steam plant, which is an important consideration and it results in oversized (30") chilled water mains to be extended to south campus since the majority of growth is in this area. In addition, the central location needed for the plant is in an area of campus which is currently developed making sitting of a new plant problematic if not undesirable. A single central plant would require significant capital for both the plant and distribution which may not be achievable in the time frame in which cooling is required. If there were no other centralized options, a single central plant option should be further evaluated. Since there are other viable and cost effective solutions that utilize the existing old steam plant structure, the single central plant option is the least desirable and is not recommended or investigated in further detail.


Option 2 - Renovate Old Steam Plant 2019, New South Plant in South Campus 2022: With this option it is desirable to delay the capital cost of a new chiller plant on south campus and utilize the existing old steam plant for new chilled water capacity. This option installs chilled water distribution to access loads on north campus and requires temporary cooling for some buildings on both north and south campus. Building chillers meeting their life expectancy and renovations of existing buildings requiring chilled water necessitate a chilled water source on north campus. Since the old steam plant is scheduled in the master plan for renovation in 2019, existing unitary equipment will be required to continue to operate at existing buildings on north campus and temporary equipment utilized for building renovations and new construction. In the interim, chilled water distribution piping should be constructed on north campus and new loads connected to the central piping system. Temporary cooling equipment should be centralized such that all new loads can be served from a central cooling station located near the existing steam plant rather than locating unitary equipment at each building. Temporary air cooled chillers are the most cost effective solution for temporary central cooling. In 2019, 2,400 tons of chilled water capacity (two 1,200 ton chillers) should be installed in the old steam plant building and connected to the distribution system. Temporary air cooled chillers should then be removed and relocated to south campus increasing the capacity on south campus. While distribution piping is being installed on north campus, projects should also extend chilled water mains on south campus in preparation for the construction of a new chiller plant. Refer to Section G for the specific phasing. Chilled water distribution on north campus would be extended to all buildings readily accessible to the mains and any temporary equipment removed from the buildings. The distribution system should be extended into the mechanical rooms of each building on north campus in preparation for a central system. Extension to Wheeler and the Chichester Science Building may be delayed until 2025 when the equipment in these buildings has reached the end of its useful life. Provided that piping is installed into each mechanical room, piping should be configured in the building so that the builidng could quickly be switched to the central system if a building chiller failure occurs. The new north campus distribution must interconnect with piping for the south plant to allow both plants long term to share in redundancy and avoid installation of a redundant chiller in each plant. Due to the space constraints of the existing old steam plant building, the maximum anticipated capacity for the building is two 1,200 ton chillers. This does not present a problem since the bulk of campus expansion occurs in the south and both Options 2 and 3 place most of the production capacity where the highest loads are anticipated. As such 2,400 tons installed in the north plant will allow for N+1 redundancy in the plan until the south plant is constructed in 2022. Once the south plant is constructed, the distribution piping between the two plants must be interconnected to maintain redundancy as described previously. From graph D-1, temporary cooling measures must be in place to serve a north campus load of almost 1,000 tons through 2019. The indicated campus load is based on the assumptions that chillers fail at the end of their calculated useful life and new loads due to renovations or new construction. Existing chillers should be operated beyond their anticipated useful life to the greatest extent possible to minimize the amount of temporary cooling required on north campus but temporary cooling should be installed such that the failure of the largest chiller on north campus is covered. The distribution system should be extended into buildings as described above to act as a backup in the event of a building chiller failure. Having two 1,200 ton chillers at the north plant provides N+1 redundancy in this plant when the chillers are installed but there is a need for additional capacity through 2022. This additional capacity must be captured by temporary chillers on south campus for some new loads and keeping several of the building chillers on north campus configured such that the buildings could switch back to the unitary equipment in the event of emergency but not operate in conjunction with the central system. The


distribution piping from north campus will extend into south campus and serve some of the new south campus loads. Only buildings with the largest chillers should be configured for unitary/central plant operation to minimize costs of configuring the building for dual operation. Due to the extensive cost of controls, cost of building pump replacement and difficulty in operation, it is not recommended that the building chillers operate in parallel with the central system. The load profile for the north plant is indicated in Graph D-1 below.

Graph D-1

A new south chiller plant should be constructed in 2022 with an initial capacity of 4,800 tons (four 1,200 ton chillers) to serve loads on south campus as indicated in graph D-2. Site space should be allocated at the plant for a building addition and the installation of two additional 1,200 ton chillers in 2029. If construction costs are favorable in 2022, the entire building should be constructed with space for additional chillers in the future. The chilled water distribution system for the initial construction in 2022 consists of connection to the new buildings on south campus being operated on temporary equipment. Graph D-2 shows that there will be a temporary cooling load required on south campus of approximately 1,300 tons through 2022. This load should be served partially by the north plant and the remainder with temporary air cooled equipment as outlined in Section G. Refer to M-1.2 and M-1.3 for proposed plant location and distribution size and routing. With a substantial load increase in 2022 due to new construction, it is not anticipated that the new south plant will be constructed and able to provide cooling for finishes in new buildings. Since the north plant is constructed in 2019, the temporary cooling equipment utilized on north campus prior to plant construction should be relocated to south campus to provide temporary cooling for building finishes

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Campus Load Served by North Chiller Plant vs Calendar Year

North Chiller Plant Load vs Year

North Campus Load


until the south plant is operational. This may require that some temporary equipment be located at the buildings. From Graphs D-1 and D-2 the 2,400 tons at the north plant and 4,800 tons at the south plant allows for redundancy through 2029 when an additional expansion of the south plant would be required if buildings outlined for 2030 are funded for construction. Through 2029 a piping interconnection to the north plant provides campus wide N+1 redundancy with additional capacity of 700 tons in the event that new loads exceed expectation or if loads not currently planned for are added to the system. The chilled water distribution system installed will have sufficient capacity for the additional chilled water generation and the remainder of buildings will connect to the distribution system with the exception of some new distribution to the west of the south plant. Refer to sheets M-1.2 and M-1.3 located in Appendix C for expansion of the plant and distribution system.

Graph D-2

Option 3 - Renovate Old Steam Plant 2019, New South Plant in South Campus 2019: With this option, it is desirable to avoid installation of temporary cooling on south campus to the greatest extent possible while utilizing the existing steam plant on north campus for chilled water production. The undesirable aspect of this option is the requirement of major capital projects be under construction simultaneously on campus and the need for simultaneous capital funding of both projects. The discussion for repurposing the existing steam plant to a chilled water production facility of 2,400 tons of capacity is discussed in Option 2 and not discussed in detail for Option 3. As with Option 2, Option 3 would require that two 1,200 ton chillers be installed in the existing steam plant for capacity on north campus. Refer to graph D-1 for loads on north campus through 2030.

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Load Served by South Plant

South Campus Loads


A new south chiller plant should be constructed in 2019 with an initial capacity of 4,800 tons (four 1,200 ton chillers) to serve loads on south campus as indicated in graph D-3. If construction costs are favorable, the initial construction of the plant should provide plant square footage to accommodate installation of two future chillers which are required to meet loads beyond 2029. If a building addition is required in the future, the space should be allocated at the plant the addition and the installation of the two additional 1,200 ton chillers in 2029. The chilled water distribution system for the initial construction in 2019 consists of connection to the new buildings on south campus being operated on temporary equipment and taps for anticipated buildings to be connected in 2022. Graph D-3 shows that there will be a temporary cooling load required on south campus of approximately 1,300 tons through 2022. As with the north plant, this load should be served with temporary air cooled equipment, centralized and connected to the distribution system until construction of the south plant is complete. With installation of new chilled water capacity on south campus in 2019, relocation of temporary cooling from north campus to south campus is avoided. Refer to M-1.2 and M-1.3 for proposed plant locations and distribution.

Graph D-3

Having both the north and south plants interconnected in the distribution system will provide N+1 redundancy for the entire campus through 2029. An addition at the south plant in 2029 will maintain this level of redundancy for the campus. The major disadvantage to Option 3 is that two large capital projects are required on campus simultaneously and must be simultaneously funded. In addition, the only cost avoidance for this option is the relocation of temporary chillers utilized on north campus in 2019 since both plants would be in production simultaneously. Looking at graph D-3 no new loads would be served by relocated temporary equipment from north campus and Longwood would have already had to spend capital for temporary

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Campus Load Served by South Chiller Plant vs Calendar Year


equipment on south campus. Relocation as described in Option 2 therefore avoids an overlap in capacity that is already required on south campus in 2017 and 2018. An additional disadvantage to Option 3 is that a significant amount of distribution piping would need to be installed in 2019. All of the piping shown for installation in 2018 and 2022 would have to be installed as one project in 2019 with Option 3. With the existing old steam plant being converted, the majority of campus would be under construction simultaneously. The distribution system installation also demands additional funding beyond requirements for the old steam plant renovation and the new south plant construction. It is anticipated that it would be difficult to fund both north and south plants during the same funding cycle and that the addition of essentially all piping on south campus would only complicate that funding effort. For the reasons indicated above Option 3 is not preferred from a disruption to campus perspective and a funding perspective.

E. Recommended Chiller Plant Configuration

The goal of centralizing the chilled water system is to combine production into central locations which require less maintenance and consume less energy to produce chilled water for building cooling. When looking at construction of new chiller plants the following should be considered: Variable Primary Pumping Variable Speed Chillers Depressed Condenser Water Temperatures Capture of Building AHU Cooling Coil Condensate for Cooling Tower Make-up Reduced Condenser Bundle Flow Rates Variable Primary Pumping - A variable primary pumping system eliminates the first cost need for primary pumps which are required in a primary/secondary system and reduces pumping energy required by matching the load flow to the production flow. In the variable primary system one set of pumps provides pumping through the chillers and the distribution system with a minimum flow bypass bridge rather than the conventional primary/secondary system in which the primary circuit is constant flow and the secondary circuit is variable flow each separated by a hydraulic bridge. The variable primary system also directly links the delta T from the system with the chillers and reduces the blending which often occurs on a primary strong primary/secondary system. Variable Speed Chillers - The incorporation of a variable speed drive on central chillers offers energy savings over the constant speed variable vane chillers most often seen installed as unitary equipment. Large central water cooled chillers typically offer a 25% energy savings off of their constant speed air cooled building chiller counterparts. In addition, the units are larger, higher quality and require less overall long term maintenance. VFD driven chillers are also well suited for variable primary pumping systems since the chiller speed is modulated to the load in conjunction with the flow in variable primary pumping being modulated to match the load. Depressed Condenser Water Temperatures - In the shoulder months of spring and fall, depressing condenser water temperatures are recommended. Most new variable speed drive chillers can achieve efficiency rates at part load as low as 0.25 kW per ton with inlet condenser water temperatures depressed as low as 55 degrees. Cooling towers should be sized to allow for a 50% reduction in flow while maintaining capacity in order to run multiple towers with a single chiller for reduced condenser temperatures. Capture of Building AHU Cooling Coil Condensate for Cooling Tower Make-up - Cooling tower makeup water is the single largest water consumer in a central chilled water system. With the fact that the bulk of expansion happens in the south portion of campus where the new chiller plant is to be constructed, it


is recommended that AHU condensate be collected from new buildings and where existing buildings are renovated to be provided to the cooling towers as makeup. The water connected from the cooling coils will reduce discharge to the sanitary system in conjunction with reducing water makeup at the cooling towers. The water from AHUs is clean and can be directly delivered to the cooling towers to offset makeup. Reduced Condenser Bundle Flow Rates - When selecting cooling towers and chillers, a reduction from the conventional 3gpm per ton condenser rate to 2.5gpm per ton should be considered. The chillers and towers can be selected to operate at a higher condenser delta T while only slightly affecting chiller operating efficiency at full load. Condenser pumping energy is reduced in conjunction with reduced pipe sizes to the towers, chillers and reduced condenser header sizes.

F. Recommended Option

While both Options 2 and 3 end in the same long term result, it may be more advantageous from a funding perspective and allow additional planning time to implement Option 2 Renovate Old Steam Plant 2019, New South Plant 2022. In addition, Option 2 uses temporary cooling from north campus on south campus to allow for a delay of the south plant to the greatest extent possible without overlap of temporary equipment. Option 2 requires temporary cooling to serve some of the campus buildings such as French, Tabb, Student Union, Admissions and additional buildings on south campus. Option 2 requires these temporary sources to be operated for a longer duration but prevents simultaneous large scale construction projects on both north and south campus. In addition, Option 2 affords additional time for planning and analysis to locate new chilled water production on south campus. This option also delays the capital funding requirement for a new building and chilled water production equipment on south campus. For all intent and purposes, both Options 2 and 3 will realize the same final objective and be comparable in overall cost. Option 2 does afford additional planning time for a new plant on south campus and would potentially reduce the capital funding commitment required in 2019. In addition Option 2 prevents large scale simultaneous construction projects on campus with chilled water distribution associated with both. It should be noted that with either Option 2 or Option 3, distribution projects should begin immediately and must be planned to develop the chilled water distribution mains and prepare the campus for conversion to a central chilled water system.

G. Implementation Strategy for Selected Option and Cost Projections

AEI reviewed the possibility of interconnection of all North Campus buildings with distribution piping and relying on installed capacity for redundancy and potentially offsetting capacity requirements for installation in 2019. As indicated in graph G-1 below, the existing total installed capacity on North Campus today is 1,828 Tons. South Ruffner and Coyner currently have chillers installed that are operating beyond their anticipated life and should not be relied upon for production capacity. Assuming that South Ruffner and Coyner chillers are contributors of chilled water however, we will assume the total capacity of 1,828 tons. The largest single chiller on north campus has 350 tons of capacity and is installed in the Blackwell Building. Assuming that north campus needs to maintain N+1 redundancy, the maximum capacity that can be sustained by combining all of the existing chillers is therefore 1,478 tons. The current anticipated diversified load of all existing buildings with chillers installed is 1,586 tons leaving a deficit today of 108 tons. This problem is compounded by the fact that South Ruffner and Coyner chillers should not be relied upon for chilled water production due to the age of these chillers. Reduction of their capacity and loss of the Blackwell chiller results in a 233 ton deficit today on north campus.


The above analysis looks only at the condition today. As additional buildings are renovated on North Campus through 2019 and as existing building chillers age, the gap between reliable production capacity and building loads widens. This condition is a clear indicator that interconnection of the existing buildings will not provide any redundancy unless additional capacity is installed immediately and additional capacity is installed with each building that is renovated and connected to the system. In 2019 when the existing steam plant is to be converted to a central chilled water plant, the North Campus load will be approximately 2,000 tons if all buildings were connected and operating as a virtual plant. It should be noted that this load does not match the anticipated load identified in graph C-1 due to the fact that the analysis to generate graph C-1 assumes that only renovated buildings and buildings whose chillers are beyond their anticipated life are included in the load calculation. The fact that the load of a virtual plant would be 2,000tons, this would indicate that the firm capacity of the combination of the renovated steam plant and the virtual plant would have to be 2000 tons. Since the firm capacity of the virtual plant is 1,478 tons, two 1,200 chillers would still need to be installed at the existing steam plant to maintain redundancy of the virtual plant and the renovated steam plant. If redundancy is required at the connected buildings then the virtual plant would not offset capacity to be installed in the existing steam plant in 2019. It should be noted that under the proposed Option 2, existing buildings with chillers would remain as such and if there is no current redundancy then renovation of the existing steam plant would not provide additional redundancy to existing building chillers. For each building converted to operate as part of the virtual plant, a cost of approximately $150,000 per building would be required. If all existing buildings with chillers were connected to operate as a virtual chiller plant, 10 buildings would have to be modified from their existing configuration at a cost of approximately $1,500,000 not including the cost of distribution piping. Future buildings could absorb the cost for connection to the central system in their respective renovation projects. The $1,500,000 premium to convert the buildings is the approximate cost of the installation of the second chiller at the renovated steam plant and therefore does not represent cost savings with respect to offset of installed capacity in 2019. In addition, a virtual plant using multiple building requires very tight controls and continuous monitoring to insure proper operation. For these reasons, the virtual plant is not recommended for north campus.

Graph G-1

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Current Firm Capacity


As an alternative to installing temporary chilled water capacity at each building until the existing steam plant is converted in 2019, air cooled chillers could be located near the existing steam plant and the distribution system constructed such that renovated buildings and buildings whose chillers fail can be connected to a central loop served by co-located air cooled chillers. Once chilled water capacity is installed in the renovated existing steam plant, the temporary air cooled chillers could be relocated to the south campus and serve a similar role until construction occurs in 2022. Implementation of a central chilled water system should start with installation of distribution piping on north campus and south campus in preparation for connection to central chilled water production facilities. Implementation in 2012 In 2012, construction of the new Student Union and renovations at French and Stubbs will require the installation of temporary cooling. The equipment for temporary cooling should be utilized elsewhere on campus once the distribution piping has begun in order to maximize the investment in the equipment.

EXT2012 Costs LABOR &Description QTY UNIT MATERIAL

Temporary Cooling at French 1 EA 250,000$ Temporary Cooling at Stubbs 1 EA 250,000$ Temporary Cooling at Student Union 1 EA 300,000$ Subtotal for 2012 800,000$ 10% Estimating Contengency 80,000$

Total for 2012 880,000$


Implementation in 2014 As soon as possible (2014), distribution piping should be extended to Coyner, Hiner, South Ruffner, French and the Student Union. The distribution piping should be connected to temporary chillers of adequate size to serve the load for French, the Student Union and Hiner in the event of a chiller failure at Hiner, Coyner or South Ruffner. Hiner is the largest load of the three existing buildings being served by chillers operating beyond their anticipated useful life. All buildings on north campus should be connected to the distribution system but continue to operate on their building chillers unless a building chiller fails. Local temporary chillers at the Student Union and French should be relocated to a central location and connect to the distribution system in 2014 as indicated on M-1.2 and M-1.3. The new Admissions building on south campus must be provided with local temporary cooling equipment in 2014.

EXT2014 Costs LABOR &Description QTY UNIT MATERIAL

Temporary Chiller(s) at Old Steam Plant 1 EA 300,000$ Temporary Chiller at Admissions Bldg 1 EA 250,000$ Relocate Temporay Chillers from Student Union and French 1 EA 150,000$ 18" CHS/R Main 970 LF 699,000$ 6" CHS/R to South Tabb 110 LF 40,000$ 4" CHS/R to French 90 LF 27,000$ 4" CHS/R to South Tabb 40 LF 12,000$ 6" CHS/R to South Ruffner 120 LF 29,000$ 8" CHS/R to Blackwell 85 LF 28,000$ 6" CHS/R to Hiner 85 LF 31,000$ 4" CHS/R to Hiner 15 LF 5,000$ 4" CHS/R to Coyner 160 LF 48,000$ 6" CHS/R to Jarman 160 LF 58,000$ 4" CHS/R to Landcaster 110 LF 33,000$ 25% Allowance for Fittings and Valves 1 EA 253,000$ Subtotal for 2014 1,963,000$ 10% Estimating Contengency 196,300$

Total for 2014 2,159,300$


Implementation in 2016 Due to renovations at Lankford and Stubbs, the distribution system must be extended in 2016 to provide chilled water to these buildings. The distribution system which terminated at the Student Union in 2014 should be extended and new piping serve Lankford and Stubbs. Additional temporary cooling capacity should be installed in 2016 and located near the existing boiler plant as indicated on M-1.2. The new Performing Arts, Public Safety and Hull Annex Buildings must be served locally by temporary equipment in 2016.

EXT2016 Costs LABOR &Description QTY UNIT MATERIALTemporary Chiller(s) at Old Steam Plant 1 EA 150,000$ Temporary Chiller at Performing Arts 1 EA 250,000$ Temporay Chiller at Hull Annex 1 EA 200,000$ 18" CHS/R Main 780 LF 562,000$ 10" CHS/R to Stubbs 300 LF 120,000$ 4" CHS/R to Stubbs 60 LF 18,000$ 4" CHS/R to Lankford/Addition 40 LF 12,000$ 4" CHS/R to Lankford/Addition 40 LF 12,000$ 25% Allowance for Fittings and Valves 1 EA 181,000$ Subtotal for 2016 1,505,000$ 10% Estimating Contengency 150,500$

Total for 2016 1,655,500$ Implementation in 2017 The Wygal renovation in 2017 will require temporary cooling until the distribution system is expanded in 2018. If the renovation can be served by the Bedford chillers, this cost could be avoided. A detailed study of Bedford and its capacity would be required.

EXT

2017 Costs LABOR &Description QTY UNIT MATERIALTemporary Chiller at Wygal 1 EA 150,000$

Subtotal for 2017 150,000$ 10% Estimating Contengency 15,000$

Total for 2017 165,000$


Implementation in 2018 In 2018, new construction of ARC 2 and ARC 3 near the existing ARC building will require that the chilled water distribution system be extended as indicated on M-1.2 and M-1.3. The Wygal temporary chiller should be removed and Wygal connected to the central system being served by north campus temporary chillers. In addition, the Multi-Purpose Center is constructed on south campus in 2018 and will require temporary cooling. Temporary cooling should be located at the Multi-Purpose Center site and distribution extended to serve the Admissions building. The Admissions buildings temporary chiller should be relocated to the Multi-Purpose Center in order to start a temporary chilled water supply source at the Multi-Purpose Center site as indicated on M-1.3. Temporary cooling at the Multi-Purpose Center will remain until construction of the chiller plant on south campus in 2022. New construction of the Performing Arts Building and Hull Annex will require local temporary cooling equipment until 2022 when the south chiller plant is constructed in conjunction with the distribution system.

EXT2018 Costs LABOR &Description QTY UNIT MATERIALTemporary Chiller(s) at Old Steam Plant 1 EA 150,000$ Temporary Chiller at Performing Arts 1 EA 250,000$ Temporay Chiller at Hull Annex 1 EA 200,000$ Temporay Chillers at Multi-Purpose Center 1 LS 350,000$ Remove temporary chiller from Wygal 1 EA 30,000$ Remove temporary chiller from Admissions 1 EA 30,000$ 24" CHS/R Main 250 LF 240,000$ 4" CHS/R to ARC 2 100 LF 30,000$ 6" CHS/R to ARC 3 100 LF 36,000$ 4" CHS/R to ARC 200 LF 60,000$ 6" CHS/R to Library 100 LF 36,000$ 4" CHS/R to Wygal 130 LF 39,000$ 30" CHS/R Main / South Campus 40 LF 48,000$ 24" CHS/R Main / South Campus 40 LF 39,000$ 12" CHS/R to Multi-Purpose Center/Temp Chillers 180 LF 87,000$ 6" CHS/R to future Student Activtity Center 140 LF 51,000$ 4" CHS/R to Admissions Bldg 180 LF 54,000$ 25% Allowance for Fittings and Valves 1 EA 180,000$ Subtotal for 2018 1,910,000$ 10% Estimating Congengency 191,000$

Total for 2018 2,101,000$


Implementation in 2019 In 2019, the existing old steam plant should be renovated to serve as a chilled water production facility. Two 1,200 ton chillers should be installed to serve loads on north campus and to provide capacity for buildings on south campus until the south plant is constructed in 2022. Installation of 2,400 tons on north campus will allow the relocation of temporary cooling from north campus to south campus in preparation of new loads requiring cooling prior to construction of the south chiller plant. Buildings on north campus with existing chillers will continue to operate on the existing chillers with the capacity in the north plant serving as a backup for those buildings and the installed north plant capacity serving as primary cooling for new buildings and renovated buildings. Existing buildings on north campus should be connected to the distribution system to allow a changeover to the central system in the event of a chiller failure at the building. Buildings with building chillers on north campus must operate to the greatest extent possible due to the fact that the north plant will be serving loads on south campus until 2022 when the south plant is constructed and distribution system expanded. The Graham, Northeast Academic, Tabb and South Tabb buildings connect to the north plant via new distribution piping in 2020 as indicated on M-1.2. A portion of the temporary chiller capacity will need to remain at the north plant in order to serve these loads until the south plant is built. The extended temporary cooling at the north plant is required due to the fact that in 2020 the north plant continues to serve some of the south plant loads such as ARC, ARC 2, ARC 3, Lankford, etc.

EXT2019 Costs LABOR &Description QTY UNIT MATERIALDemolition at Existing Steam Plant(exising boilers and support equipment) 1 LS 250,000$ Existing Bldg Modifications (fire protection, etc.) 1 LS 200,000$ Chillers (2,400 Tons), pumps, cooling towers, electrical 2 EA 10,800,000$ 18" CHS/R at Plant 60 LF 44,000$ Subtotal for 2019 11,294,000$ 10% Estimating Contengency 1,129,400$

Total for 2019 12,423,400$


Implementation in 2022 The south plant should be constructed in 2022 with an initial chilled water capacity of 4,800 tons (four 1,200 ton chillers). A significant amount of distribution piping must be installed along with construction of the new south plant. All loads being served by temporary equipment on south campus must be served by the new south plant. Temporary cooling equipment from north campus may need to be relocated temporarily in order to serve new buildings for finishes cooling or as temporary cooling until the south plant can produce and distribute chilled water. The chillers at the Center for Health and Fitness and Dorrill Dining Hall will reach their anticipated useful life in 2022 and should be removed and buildings served from the south plant. New buildings being constructed and anticipated need for cooling on south campus in 2022 are the Curry/Frazer Replacements and the Nanatorium. Buildings being served by temporary equipment are Admissions, Hull and Hull Annex, Multi-Purpose Center, Performing Arts and Public Safety. These buildings should have local temporary equipment removed and be served by the south plant as soon as distribution and the south plant are complete. Loads in 2022 that should be shifted from the north plant to service from the south plant include, ARC, ARC 2, ARC 3, Lankford and additions, Stubbs and Wygal. With interconnection with the north plant, the campus will have an N+1 redundancy in chillers. Additional campus loads through 2028 will be served by the combined capacity of the north and south plants.

EXT2022 Costs LABOR &Description QTY UNIT MATERIALConstruct new South Chiller Plant 4,800 Tons 1 LS 16,800,000$ 30" CHS/R Main 50 LF 60,000$ 24" CHS/R Main 1200 LF 1,440,000$ 18" CHS/R Main 1150 LF 828,000$ 18" CHS/R Main / Recommended 550 LF 396,000$ 6" CHS/R to Bedford 90 LF 33,000$ 4" CHS/R to Public Safety 320 LF 96,000$ 6" CHS/R to Dorrill Dining Hall 320 LF 116,000$ 6" CHS/R to Performing Arts 280 LF 101,000$ 6" CHS/R to Curry Replacement 160 LF 58,000$ 6" CHS/R to Willett Hall 60 LF 22,000$ 4" CHS/R to Hull Hall 140 LF 42,000$ 4" CHS/R to Hull Annex 60 LF 18,000$ 6" CHS/R to Aquatics 60 LF 22,000$ 6" CHS/R to Center for Health and Fittness 180 LF 65,000$ 6" CHS/R to Frazer Replacement 60 LF 22,000$ Rework in Buildings for Connection to Central System 6 EA 750,000$ Relocate Temporary Chillers from North Plant for Finishes 1 LS 150,000$ Subtotal for 2022 21,019,000$ 10% Estimating Contengency 2,101,900$

Total for 2022 23,120,900$


Implementation Beyond 2022 Various buildings including, Cox Dorm, Willett Addition, Ruffner, Communications Studies Theater Arts and others as indicated on M-1.2 and M-1.3 will connect to the existing distribution system and be served by the central system beyond 2022. In 2028, if buildings outlined in the loads spreadsheet for " Future Buildings Beyond 2022" are slated for funding and are to be constructed beyond 2028, an additional capacity of 2,400 tons and a building addition should occur at south plant to serve these future loads. Since there is additional capacity built into the system, no new capacity should be required until 2028. A re-evaluation should occur in 2026 or 2027 as to which buildings are planned for construction in the next 5 years and determine if additional capacity at the south plant is required. Assuming that the look ahead indicates a large portion of the projected buildings are to be constructed, an expansion and additional capacity should be budgeted for the south plant.

EXTBeyond 2022 Costs LABOR &Description QTY UNIT MATERIAL6" CHS/R to Rec and Fitness Center 40 LF 15,000$ 6" CHS/R to Student Activity Center 40 LF 15,000$ 10" CHS/R to New Library 240 LF 96,000$ 8" CHS/R to 3 Acedemic Buildings 280 LF 90,000$ 6" CHS/R to New Library 40 LF 15,000$ 6" CHS/R to New Dining Facility 40 LF 15,000$ 6" CHS/R to Communications Studies 60 LF 22,000$ 10" CHS/R to 7 Residence Halls 320 LF 128,000$ 4" CHS/R to McCorkle, Jeffers, Stevens 100 LF 30,000$ 8" CHS/R to Cox, Wheeler 300 LF 96,000$ 8" CHS/ R to Chichester Science 440 LF 141,000$ 4" CHS/R to Jarman 100 LF 30,000$ Addition at South Plant 2028, 2,400 Tons 1 LS 8,400,000$ Subtotal Beyond 2022 9,093,000$ 10% Estimating Contengency 909,300$

Total Beyond 2022 10,002,300$


H. Appendix A - Existing Equipment

BldgNum Building Name GSF

CoolSystem Type Description Make Model S/N Voltage

Ref Type

Ref Charge (lbs)

Chiller Tons

Condition

Cooling Tower Bypass (Y/N) Make Model S/N

CT Tons Condition

Variable Primary(VP) or Primary Secondary(PS) Flow (gpm) Head (ft) Hp Tag

Primary VFD(Y/N) Flow (gpm) Head (ft) Hp Tag

Secondary VFD(Y/N) Flow (gpm) Head (ft) Hp Tag

2 Way or 3 Way Valves at

AHU Notes:YearBuilt

A/CArea

BuildingUse

69 ARC 47548 Water Cooled Chiller Chiller 1 McQuay WHR080DWX 5WH0187600 208 R-22 CKT1=60 78.5 Good N Evapco LSWA-5882 917076 78.5 Good ConstFlowPrimary 202 75 7.5 P1 N 265 100 10 P3 2Pos/FCU 2pipe system w/HW Residence HallCKT2=60 202 75 7.5 P2 N 265 100 10 P4

56 Bedford 26242 Water Cooled Chiller Chiller 1 (relocated) Trane RTHB 150F MF00 NW00 00VN N3LF 2LF0 0QU0 U96L08431 460 R-22 285 150 1996 Y BAC 3272C-2 U106915302 450 New VP w/min flow bypass 300 100 20 P-1 Y 450 40 7.5 CWP-1 2 Way 2010Bedford Addition ? Chiller 2(new) Trane CVHE045FA4Z0PCK21853FS5MFA000000Q000070CSW0002C100A L10B00918 460 R-123 600 300 2010 Y 600 100 30 P-2 N 900 40 15 CWP-2 CWP-1 = CS, CWP-2=CS, CWP-3=VFD

600 100 30 P-3 Y 900 40 15 CWP-3 Serves Wygal14 Blackwell 48448 Water Cooled Chiler Chiller1 York YTK1B2C3-CKJS GAKM 120454 460 R-123 350 2005 Y BAC 15350 U002257501 350 2005 PS 840 50 20 P-CP1 N 600 80 20 SCHP-1 Y 1050 120 50 P-CT1 2Way/3Way (2)AHU w/2Way, Remainder w/3Way 1920 Office/Meeting

840 50 20 P-CP2 N 600 80 20 SCHP-2 Y 1050 120 50 P-CT291 Center for Communication Studies, Theater Arts Building 41983 Water Cooled Chiller Chiller 1 Trane RTWD 120F 2A01 A1A1 AA1A 1A1Y 1A0A 1000 1000 100A 2001 0000 U08F09038 460 R-134A CKT1=132 126.7 2009 N Evapco AT 19-76 7-323687 126 2009 ContsFlowPrimary 310 85 15 CWP-1 N 415 55 10 CDP-1 3 Way VFD on Condenser Pump 2009

CKT2=132 90 Center for Health and Fitness 74683 Air Cooled Chiller Chiller 1 Trane RTAC 1404 UL0N UAFN N1NX 1DDL NN0E N10A R0EX N U06C06694 460 R-134A CKT1=165 140 2007 VP w/min flow bypass 180 55 5 P-1 Y 2 Way 2 Way on all AHUs 2007 Recreation

CKT2=165 180 55 5 P-2 YChiller 2 Trane RTAC 1404 UL0N UAFN N1NX 1DDL NN0E N10A R0EX N U06C06695 460 R-134A CKT1=165 140 2007

CKT2=16581 Chichester Science Building 71804 Water Cooled Chiller Chiller 1 Trane RTHD VC1F XA0U AE1A 3LAL F1A2 LALA XXQA EXAA OXY2 15AA VAX4 XXRX VX U04F06280 460 R-134A 525 250 2005 Y Marley NC8302FL2SS NC-245138-A1 250 2008 PS 600 40 15 P3 N 1175 117 40 P1 Y 750 60 20 P-5 2Way/3Way AHU-1=3Way, three others 2Way 2005 Lab

Chiller 2 Trane RTHD VC1F XA0U AE1A 3LAL F1A2 LALA XXQA EXAA OXY2 15AA VAX4 XXRX VX U04F06279 460 R-134A 525 250 2005 Y Marley NC8302FL2SS NC-245138-A2 250 2008 600 40 15 P4 N 1175 117 40 P2 Y 750 60 20 P-69 Cox Dorm 44888 Air Cooled Chilller Chiller 1 York YLAA0090SE17XAASDTXXTXBLXCXX42XXXXXHXXXTAXXXXXIBXXLXXJXXXXX RCTM022273 208 410A CKT1=57 84 New VP 15 CWP-1 Y 2 Way 1962 Residence

CKT2=57 15 CWP-2 Y Chiller 2 York YLAA0090SE17XAASDTXXTXBLXCXX42XXXXXHXXXTAXXXXXIBXXLXXJXXXXX RCTM022271 208 CKT1=57 84 New

CKT2=5758 Coyner 18300 Air Cooled Chiller Chiller 1 Trane CCACC806RFNJR423ADGPRT U89M01297 208 R-22 80 1989 Trane CAUCC80E2A131 J89J72703 1989 ConstFlowPrimary 5 No Tag N 3Way DX Condenser on Roof, no cooling tower * 1972 Offices48 Curry 107424 Water Cooled Chiller Chiller 1 Carrier 30HXC136RY-530--- 1399F08986 208 R-134A CKT1=124 115 1998 Y BAC VT0-132-CC 99104491 115 1992/Poor PS 300 36 5 No Tag N 300 105 15 P-1 Y 340 48 5 No Tag 2 Pos/FCUs 2 pipe system w/HW, all 5-7yr old FCU's in bldg 1969 Residence Hall

CKT2=89 300 105 15 P-2 Y

76 Dorrill Dining Hall 60171 Water Cooled Chiller Chiller 1 McQuay PEH050-BBBA 58K81035-00 460 R-134A 530 154 Y BAC FXT-260 U025863401 Good ConstFlowPrimary 370 50 15 CWP-1 N 950 115 15 CHWP-1 3 Way

Cond Pumps tag indicate 40HP, 15HP Motors are installed. Noted that piping to heat exchanger was very cold indicating chilled water. Drawings show these pipes as condenser water. Needs to be investigated to insure chilled water is not being wasted by heating it with condenser water. 2000 Dining Hall

370 50 15 CWP-2 950 115 15 CHWP-260 Frazer 103990 Water Cooled Chiller Chiller 1 Trane CGWD050GCF0NAT101FF0UG U93E05969 208 R-22 CKT1=46.5 50 1993 Y BAC VT0-132-L U001823501 Good PS 146 30 2 P-8 N 300 105 15 P-3 Y 153 38 3 P-9 2 Pos/FCUs 2 pipe system w/HW 1970 Residence Hall

CKT2=46.5 146 30 2 P-10 N 300 105 15 P-4 Y 153 38 3 P-11Chiller 2 Trane CGWD060GCG0HAT101FF0UG U94G03093 208 R-22 CKT1=46.5 60 1994

CKT2=46.583 Grainger 27712 Served from Blackwell 250 120 10 PCH-3 N 3 Way Pumps located in Blackwell MER 2003

250 120 10 PCH-4 N17 Hiner 36869 Air Cooled Chiller Chiller 1 Carrier 30GTP170---610KA 4097F98936 460 R-22 CKT1=153 150 Fair ConstFlowPrimary 375 80 15 P-3 N 3 Way 1909 Classrooms/Office

CKT2=162 375 80 15 P-470 Hull 29063 Water Cooled Chiller Chiller 1 Trane RTWA1004YA01C1D0WFN U95H09952 460 R-22 CKT1=72 100 1995 Y Evapco 1CT-4-79 100 New ConstFlowPrimary 240 70 7.5 N 300 50 7.5 3 Way 1996 Classrooms/Office

CKT2=7223 Jarman 26555 Water Cooled Chiller Chiller 1 SMARDT SWA044-2BG2-22N FF0010F111Q0597 460 R-134A 597 120 New Y BAC 15146 U106670001 120 New Const Flow Primary 240 40 5 CHWP-1 N 360 50 7.5 CWP-1 3 Way One AHU w/3Way Constant Flow Primary 1951 Classrooms/Office

240 40 5 CHWP-2 N 25 Landcaster 45671 Water Cooled Chiller Chiller 1 Trane RTWA1004XA03C1D0WFT U95E07202 460 R-22 CKT1=72 100 1995 Y Marley 901127HCA1 10026178-B1 10 100 New HX 270 85 10 P-1 Y 140 60 5 P-2 N 300 48 7.5 CWP-1 3Way Ice Storage, Bldg seperated with HX from Chiller 1938/1960 Offices

CKT2=7242 Lankford 35273 Water Cooled Chiller Chiller 1 Trane RTWA100AY001C300W U98E00312 208 R-22 CKT1=72 100 1998 Y BAC VXT-45C U065571404 Fair ConstFlowPrimary 7.5 No Tag N 252 70 7.5 No Tag 3 Way Cooling tower in MER, ducted to exterior 1967 Student Union

CKT2=72 BAC VXT-45C U065571405 Fair65 Library 70890 Water Cooled Chiller Chiler 1 Carrier 30HXC246RY-661--- 2307Q07529 460 R-134A CKT1=220 246 N Tower Tech TTXE-041950 2007039-01 New ConstFlowPrimary 330 50 7.5 P-3 N 495 47 10 P-1 2 Way 1990 Library

CKT2=135 330 50 7.5 P-4 N 495 47 10 P-2Chiller 2 McQuay PEH063 5UL0100800 460 R-12 540 165

47 McKorkle 17,653 Water Cooled Chiller MultiStack Tandem WX070DZV 061D-1094 208 410A 32 55.5 New N Tower Tech TTMT 72 219 1079.46.09.01.01 166.6 1997 PS 400 50 7.5 CWP-P1 N 360 120 20 CWP-1 Y 500 70 15 CDP-1 2 Way 1968 Classroom/OfficesMultiStack Tandem WX070DZV 061D-1095 208 410A 32 55.5 New 400 50 7.5 CWP-P2 N 360 120 20 CWP-2 Y 500 70 15 CDP-2MultiStack Tandem WX070DZV 061D-1096 208 410A 32 55.5 New

47 Jeffers Served by McKorkle 3 Way Auditorium84,85,86 Ruffner 80,926 Served from Blackwell 2 Way 2005 Classroom/Offices

31 Ruffner, South 16,040 Air Cooled Chiller 1 Carrier 30GTP045---5--KA 4296F35758 208 R-22 CKT1=40 45 1996 ConstFlowPrimary 89 50 CHWP-1 HX Fan coil units. HX in MER to separate 1900 Residence HallCKT2=46 89 50 CHWP-2

39 Stevens 32,916 Served by McKorkle 2 Way/3Way (1)AHU 2 Way, (1) AHU 3 Way

64 Willett/Willett Addition 76,210 Water Cooled Chiller Chiller 1 Carrier 30HXL106R--661-- 2407Q07539 460 R-134A CKT1=110 100 2006 Y BAC FXT-99X U0256965 100 2006 ConstFlowPrimary 250 50 5 300 30 5 3WayAll 5 AHUs are 3Way, 2DX unit for gym, 1DX for locker room 1981/2007 Gym, Offices, Class

CKT2=7046 Wheeler 45,978 Air Cooled Chiller 1 York YCAV0177VA17VABCSTXXTXXLXXXX42XXXXXXHXXXSAXXXXX3CXXLXNJXXXXX RBSM017679 208 R-134A CKT1=185 151.3 2007 VP 250 75 15 CWP-1 Y 2Way

CKT2=170 250 75 15 CWP-2 Y57 Wygal 24,961 Served by Bedford 2 Way AHU's 1, 2 & 3 are all 2 Way. Served from Bedford 1971 Classrooms/Office

* Coyner has server room residential DX unit on roof, Liebert Unit and second Residential DX unit

Primary Pump Data Secondary Pump Data Condenser Water Pumps

Existing Cooling (Chilled Water and DX) Equipment

Cooling TowerChiller


I. Appendix B - Campus Load Maps


J. Appendix C - Option 2 - Chiller Plants and Distribution Routing


K. Appendix D - Temporary Chiller, Building Connection P&ID

Documents

Farmville, Virginia CHILLED WATER MASTER PLAN...Farmville, Virginia CHILLED WATER MASTER PLAN Final Report January 3, 2012 Submitted by: Affiliated Engineers, Inc. 1414 Raleigh Road,