2018 NYStretch Second Commercial Working Group Meeting...Oct 24, 2017 · 9 Cooling tower and boiler efficiency 0.5% 0.8% 10 Hotel guestroom HVAC vacancy control NA 11 SWH waster

©2017, New Buildings InstituteAll Rights Reserved © 2017 New Buildings Institute

October 24, 2017

WebEx

2018 NYStretchSecond

Commercial Working Group

Meeting

All Rights Reserved © 2017 New Buildings Institute

Agenda

• Roll call and introductions of new Working Group members – Jeff Domanski (IBTS)

• Purpose and schedule update – Jim (NBI) & NYSERDA

• Review and update on commercial modeling approach and analysis – Bing and Jian (PNNL)

• Multifamily direction and considerations – Jim and Mark (NBI)

• Update on Commercial Strawman topics and proposals – Jim and Mark (NBI)

• Discussion and next steps – All


Roll call and introductions of new Working Group members

Jeff Domanski - IBTS


Recap of Stretch Code Progress and Schedule

Jim Edelson (NBI)


Revised TimetableMILESTONE DATE

Kickoff June 8, 2017

1st round Technical Working Group meetings July 2017

NYStretch-Energy Advisory Committee (Meeting 2)

PRESENT DRAFT ENERGY ANALYSIS

September 28, 2017

2nd Round of Technical Working Group Meetings October 2017

NYStretch-Energy Advisory Committee (Meeting 3)

PRESENT FINAL ENERGY ANALYSIS

December 1st or 8th 2017

NYStretch-Energy draft December 2017

Legal review January 2018

Public comment February/March 2018

Toolkit updates May 2018

Final NYStretch-Energy May 2018


2018 NYStretch Development Process

• Advisory Group guidance - Make it rigorous but straightforward and achievable; backstop for best practices in building design/engineering

• Residential, Commercial, and Multi-family Working Groups reviewed “Strawman” measures generated by project team w/ Advisory Group guidance

• Modeling conference call discussed study design

• Iterative energy modeling to predict savings and fine-tune


Stakeholder Input

• Working Groups (3 in-person meetings and webinar)• Commercial, Multifamily and Residential Working Groups

• Reviewed current stretch code development (eg 189.1, T24…)

• Reviewed NYC Resiliency Guidelines

• Coordinated with Zero Cites Reach Code Development

• Public Comment Period

• Legal Review


NYStretch Resource Page

https://newbuildings.org/nystretch/


Review and update on commercial modeling approach and analysis

Bing Liu and Jian Zhang (PNNL)

NYStretch-Energy 2018

Preliminary Analysis

September 27, 2017

BING LIU, P.E.Group Leader, Building Energy Research and Analysis

Present to NYStretch-Energy Advisory Group

Co-authors: Dr. Jian Zhang, Dr. Yan Chen

PNNL-SA-xxxxxx

Commercial Buildings

September 21, 2017 11

Proposed Measures

Envelope


No. Measure Description Hotel Office School Retail10-story

Apt20-story

Apt

1Enhanced insulations for roofs and walls

yes yes yes yes yes yes

2 Enhanced windows yes yes yes yes yes yes

3Air leakage testing for large buildings

yes yes yes NA yes yes

Proposed Measures

Lighting



Apt20-story

Apt

4 Reduced LPD for interior lightings yes yes yes yes yes yes

5Occupancy sensors and automatic lighting controls


6 Parking lot lighting control yes yes yes yes yes yes

Proposed Measures

Mechanical



Apt20-story

Apt

7Fan power limit: 0.8 W/cfm VAV and 0.65 W/cfm CAV


8 DX equipment efficiency NA NA yes yes yes yes

9Cooling tower and boilerefficiency

yes yes yes NA NA NA

10Hotel guestroom HVAC vacancy control

yes NA NA NA NA NA

11 SWH waste heat recovery yes NA NA NA yes yes

* EEM13 has some EnergyPlus simulation issue

Proposed Measures

Others



Apt20-story

Apt

12 Plug load reduction yes yes yes NA NA NA

13 Ventilation optimization yes* yes* yes* NA NA NA

14 Thermal bridging yes NA NA NA yes yes

15 Solar heat gain control yes yes yes yes yes Yes

16Daylighting control all daylighted area in offices

NA yes NA NA NA NA

* EEM13 has some EnergyPlus simulation issue

Preliminary Results

Office


EEM # Energy Design Measures

Large Office

4A 5A 6A

Site EUI Saving %

Baseline 90.1-2013 --- --- ---

1 Enhanced insulations for roofs and walls 0.1% 0.1% 0.1%

2 Enhanced windows 0.8% 0.8% 1.0%

3 Air leakage testing for large buildings 0.7% 0.9% 0.9%

4 Reduced LPD for interior lightings 1.7% 1.6% 1.5%

5 Occupancy sensors and automatic lighting controls 0.8% 0.7% 0.7%

6 Parking lot lighting control 0.6% 0.5% 0.6%

7 Fan power limit: 0.8 W/cfm VAV and 0.65 W/cfm CAV 0.4% 0.4% 0.4%

8 DX equipment efficiency NA NA NA

9 Cooling tower and boiler efficiency 0.7% 0.9% 0.9%

10 Hotel guestroom HVAC vacancy control NA NA NA

11 SWH waster heat recovery NA NA NA

12 Plug load reduction 0.5% 0.4% 0.4%

13 Ventilation optimization NA NA NA

14 Thermal bridging NA NA NA

15 Solar heat gain control 0.5% 0.4% 0.4%

16 Daylighting control all daylighted area in offices 0.7% 0.6% 0.6%

Preliminary Results

Hotel



Large Hotel

4A 5A 6A

Site EUI Saving %

Baseline 90.1-2013 --- --- ---








8 DX equipment efficiency NA NA NA

9 Cooling tower and boiler efficiency 1.6% 2.2% 2.4%

10 Hotel guestroom HVAC vacancy control 3.0% 3.9% 4.0%

11 SWH waster heat recovery 7.9% 7.9% 8.2%

12 Plug load reduction 3.7% 3.4% 3.4%


14 Thermal bridging 0.4% 0.6% 0.6%

15 Solar heat gain control -0.2% -0.3% -0.4%

16 Daylighting control all daylighted area in offices NA NA NA

Preliminary Results

Retail



Stand-alone Retail

4A 5A 6A

Site EUI Saving %

Baseline 90.1-2013 --- --- ---



3 Air leakage testing for large buildings NA NA NA





8 DX equipment efficiency 0.7% 0.5% 0.4%

9 Cooling tower and boiler efficiency NA NA NA


11 SWH waster heat recovery NA NA NA

12 Plug load reduction NA NA NA



15 Solar heat gain control 0.0% -0.1% -0.1%


Preliminary Results

School



Secondary School

4A 5A 6A

Site EUI Saving %

Baseline 90.1-2013 --- --- ---







7Fan power limit: 0.8 W/cfm VAV and 0.65 W/cfm CAV 1.0% 0.9% 1.0%

8DX equipment efficiency 0.3% 0.2% 0.2%

9Cooling tower and boiler efficiency 0.5% 0.8% 0.8%


11SWH waster heat recovery NA NA NA

12Plug load reduction 3.7% 3.4% 3.5%



15 Solar heat gain control 1.4% 1.2% 1.2%


EEMs are bundled together to determine interactive

savings

October 25, 2017 20

EEM03

EEM01

Bundle2

Lighting

Bundle3

Mechanical

Bundle1

Envelope

EEM06

EEM05 EEM04

EEM11

EEM10 EEM09

EEM02

EEM15 EEM12 EEM16 EEM07 EEM08

EEMs are bundled together to determine interactive

savings

October 25, 2017 21

Envelope

Lighting

Mech

All


Preliminary Results

Large Hotel

2.0%5.8%

12.7%

20.3%

2.1%5.0%

14.1%

21.4%

2.4%5.3%

14.6%

22.1%

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

90.0

100.0

To

tal

EU

I, k

Btu

/sfI

4A (New York) 5A (Albany) 6A (Binghamton)

Large Hotel

Saving

Service Water Heating

Miscellaneous Load

Lighting

HVAC Auxiliaries

Cooling

Heating


Preliminary Results

Secondary School

2.4%

9.4%

1.8%

13.8%

3.2%

8.6%

1.9%

14.2%

3.1%

8.9%

1.9%

14.5%

0.0

5.0

10.0

15.0

20.0

25.0

30.0

35.0

40.0

45.0

To

tal

EU

I, k

Btu

/sfI


Secondary School

Saving


Miscellaneous Load

Lighting

HVAC Auxiliaries

Cooling

Heating


Preliminary Results

Stand-alone Retail

0.6%

12.1%

1.1%

14.0%

1.2%

10.8%

0.9%

12.8%

1.4%

11.7%

0.8%

13.7%

0.0

10.0

20.0

30.0

40.0

50.0

60.0

To

tal

EU

I, k

Btu

/sfI


Stand-alone Retail

Saving


Miscellaneous Load

Lighting

HVAC Auxiliaries

Cooling

Heating


Preliminary Results

Large Office

1.9%3.8%

1.1%

6.7%

2.2% 3.6%1.4%

6.9%2.3% 3.6%

1.3%

7.0%

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

80.0

To

tal

EU

I, k

Btu

/sfI


Large Office

Saving


Miscellaneous Load

Lighting

HVAC Auxiliaries

Cooling

Heating


Energy Targets


Multifamily direction and considerations

Jim Edelson and Mark Lyles (NBI)

• Improved Envelope• Thermal Bridging Limitations• Improved Infiltration & Testing• Fan Efficiency• Efficient Ventilation• Lighting Efficacy• Common Areas (RES)• Efficient Exterior lighting (RES)• Compare Menus of Options – make

comm. available to low-rise MF

Proposals for NYStretch


Modeling Steps (call on Thursday)

9 Cooling tower and boiler efficiency NA yes

10 Hotel guestroom HVAC vacancy control NA NA

11 SWH waster heat recovery yes yes

12 Plug load reduction NA NA

13 Ventilation optimization NA NA

14 Thermal bridging yes

yes but

not

capture

d

15 Solar heat gain control yes Yes

16 Daylighting control all daylighted area in offices NA NA

17 Egress lighting control NA NA

18 Exterior lighting power yes Yes

No. Measure Description

10-

story

Apt20-story

Apt

1 Enhanced insulations for roofs and walls yes yes

2 Enhanced windows yes yes

3 Air leakage testing for large buildings yes yes

4 Reduced LPD for interior lightings yes yes

5

Occupancy sensors and automatic lighting

controls yes yes

6 Parking lot lighting control NA NA

7

Fan power limit: 0.8 W/cfm VAV and 0.65

W/cfm CAV NA NA

8 DX equipment efficiency yes yes


Update on Commercial Strawman topics and proposals

Jim Edelson and Mark Lyles (NBI)


Proposed 2018 Commercial Structure


Review of 2016 NYCECC

• Compared against measures listed in NYStretch-Energy 2018 Commercial Strawman

• Four items to note:1. Performance path is Appendix G or ECB

2. Tenant sub metering is required

3. SHGC is orientation neutral

4. Additional commissioning requirements for mechanical, renewable energy and service water heating systems


Modeling Compliance

2018 NYCECC language:

C407.1 Scope. This section establishes criteria for compliance using total building performance. Buildings following the total building performance path must comply with ASHRAE 90.1-2013, demonstrating compliance under Section 11 or Appendix G of such standard.


PHI & PHIUS Compliance Paths

• Prescriptive “plus” pathway

• Considering as an alternative path for envelope and air barrier requirements

• Pending DOS on viability

• Please email us your thoughts


Cooling Tower Research

• 2012 ASHRAE Journal Article identifies three levels of efficiencies for cooling towers

• Research for T24 determined 45% of products lines surveyed currently available will meet the proposed 80 gpm/hp

Low 45 – 60 gpm/hp

Medium 65 – 75 gpm/hp

High 80 – 100 gpm/hp


Enhance Data Center in Large Office

Suggest to change the energy use schedule by following the guidance from Appendix G in ASHRAE Standard 90.1

Current Schedule Proposed Schedule

“ALWAYS_ON”

• Month 1-12—100%

“DataCenter_EQUIP_SCH”

• Month 1, 5, 9—25%

• Month 2, 6, 10—50%

• Month 3, 7, 11—75%

• Month 4, 8, 12—100%

Impact: Reduce the data center load from 54% to 39%

in Large Office in New York City.

Exterior LPDsbased on ASHRAE 189.1-2017

Parking Lots (W/ft2) Building Façade (W/ft2) Doors (W/linear foot of door opening)

Lighting Zone*

90.1-2013

189.1-2017

90.1-2013 189.1-2017

90.1-2013 189.1-2017

Main Doors

Other Doors

Main Doors

Other Doors

0 0.00 0.00 0.00 0.0000 0 0 0.00 0.00

1 0.04 0.03 0.00 0.0000 20 20 12.60 12.60

2 0.06 0.03 0.10 0.0950 20 20 12.60 12.60

3 0.10 0.05 0.15 0.1425 30 20 19.95 19.95

4 0.13 0.05 0.20 0.1900 30 20 19.95 19.95

Table 8: Exterior lighting power density requirements

High-Efficacy Lighting

• Lamps 75 L/w (DOE Proposal 2018 IECC)

• Luminaires 45 L/W (IALD/Title 24)

• New Definition: “A complete lighting unit consisting of a light source or sources along with parts required to distribute the light, to position and protect the light source(s), and to connect the lighting unit to the building’s electrical system.”

Pending Review

• Egress lighting controlled down to .02 w /sq. ft. when unoccupied

• Minimum daylight zone area (eg. 75% of perimeter zone)

• Energy Star equipment beyond installed kitchen equipment

(in credit list; eg installed dishwashers, refrigerators….)

From NYStretch Code – Energy (2015)

• Occupancy Sensor in Open Offices

• Automatic Receptacle Controls


Elevators• Suggestion from 9/28 advisory group meeting

• Include drive requirements from 2015 IgCC: Potential energy released during motion shall be recovered

• Reduce time to 5 minutes before systems need to go into stand by mode

• Apply to office, 10 and 20 story Multifamily and hotel prototypes

• Tracking 90.1 Elevator Working Group but also referencing data from Fraunhofer on savings potential

Source: Fraunhofer USA


New EB Structure – Title 24

For each enclosed space:

Use Option 1, 2, or 3 to comply IF:A. Replacing three or more luminaires as entire luminaires (also referred to as one-for-one luminaire replacement) without adding, removing, or replacing walls or ceilings.

Use Option 1 or 2 to comply IF:B. Adding entire luminaire(s); ORC. Replacing three or more luminaires as entire luminaires while adding, removing, or replacing walls or ceilings; ORD. Removing ≥ 10% of existing luminaires and reinstalling the same luminaires while adding, removing, or replacing walls or ceilings.


Lighting Retrofits T24 (proposed)

Option 1

“85-100% of 2019 LPD Allowance”

all control requirements

Option 2

“≤ 85% of 2019 LPD Allowance”

many control requirements

Option 3

“Reduction of Existing Wattage by 35/50%”

few control requirements


Commissioning System Replacements – NBI proposal

C503.4.2 Commissioning New heating, cooling and duct system components that are part of the alteration and the controls that serve them shall comply with Sections C408.2.2, C408.2.3 and C408.2.5.

Exceptions: The following systems are exempt:

1. Mechanical systems in alterations where the total mechanical equipment capacity is less than 480,000 Btu/h (140.7 kW) cooling capacity and 600,000 Btu/h (175.8 kW) combined service waterheating and space heating capacity.

2. Systems included in Section C403.3 that serve individual dwelling units and sleeping units.


Commissioning System Replacements

C503.5.1 Commissioning. New service hot water system components that are part of the alteration and the controls that serve them shall comply with Sections C408.2.2, C408.2.3 and

C408.2.5Exception: Service hot water systems in alterations where the combined service water heating

and space heating capacity is less than 600,000 Btu/h (175.8 kW).


Level 3 Alterations

C503.7 Level III Alterations. Buildings undergoing Level 3 alterations shall comply with no less than two of the following:1. The building thermal envelope shall comply with the requirements for “Walls, Above Grade” from Table C402.1.4.

2. The building thermal envelope shall comply with the requirements for “Roofs” from Table C402.1.4.

3. Fenestration shall comply with Table C402.4.

4. Where the building meets the conditions of Section C402.4.2.1, the building shall comply with Section C402.4.2.1.

5. The building shall comply with the air leakage testing requirement of Section C402.5.

6. The building shall comply with Section C403.2.9.

7. Where the building meets the conditions of Section C403.4.5, comply with Section C403.4.5 without exceptions.

8. The building shall comply with Sections C405.2 and C405.3.

9. The building shall comply with Section C406.2.

10. The building shall comply with Section C406.3………………4,5,6,7

11.


Discussion

All

Documents

2018 NYStretch Second Commercial Working Group Meeting...Oct 24, 2017 · 9 Cooling tower and boiler efficiency 0.5% 0.8% 10 Hotel guestroom HVAC vacancy control NA 11 SWH waster