Monitoring-Based CommissioningBest Practices Award – Welch HallCalifornia State University, Dominguez Hills

June 17th, 2014

Monitoring-Based CommissioningCSU Dominguez Hills

Welch Hall

Content

• Project Overview• Project Team• Process & Implementation• Major Findings• Post-Implementation Baseline Energy Usage• Energy and Cost Savings• Future Improvements

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Welch Hall Overview

1. Building constructed in 20012. Total area of 179,222 square feet and four stories3. Heating and cooling provided by the campus central

plant4. Original air handling unit design caused high fan energy

and comfort issues5. 5 air handlers, 195 terminal units, 9 exhaust fans

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Project Team

ManagementKenneth Seeton

MBCx ProviderEnerNOC

MBCx ImplementationCSU Dominguez Hills

EMCOR

On-siteCSU Dominguez Hills

Facilities Personal

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The Process

• Meters installed and check for calibration• Pre-baseline data collected and Option C Baseline Created• EnerNOC verified what did and didn’t work; findings added to a punchlist.• Worked are way through a multi-page punch list• Nearly all repairs were made by staff RMs and BSEs• Brought Emcor in to install controller and do programing• EnerNOC field verified all the repairs by opening, closing, and testing every

point• Post-energy data collected and savings calculated• Training / educational wrap up meeting

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Findings Log As A Punchlist

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Item

Num

ber

Equi

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ame

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No

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Issu

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Date

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Who

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(Initi

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Reco

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Mea

sure

Typ

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Prio

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Assi

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to W

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Targ

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n Da

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Curr

ent S

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Curr

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Ope

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lose

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Note

s

1 AHU-1 No filter differential pressure gauge found

9/16/08 DCN Pre-Investigation Consider installing Delta P gauge for checking status of filters

O&M Low CSUDH Identified 10/25/11 Closed Repaired

2 AHU-1 Return fan motor has excessive noise when running at 50% speed

9/17/08 DCN Pre-Investigation Inspect bearing (replace if necessary) and lubricate motor

Repair Medium CSUDH Identified 10/25/11 Closed Repaired

3 AHU-1 Loose return fan/motor belts (look flimsy during operation)

9/17/08 DCN Pre-Investigation Apply proper tension to belts or replace if necessary

Repair High CSUDH Identified 10/25/11 Closed Repaired

4 AHU-1Return fan/motor vibration isolators do not seem to function properly (little movement)

9/17/08 DCN Pre-InvestigationCheck vibration isolators and make adjustment as necessary Repair Medium CSUDH Identified 10/25/11 Closed Repaired

5 AHU-2 No filter differential pressure gauge found

9/16/08 DCN Pre-Investigation Consider installing Delta P gauge for checking status of filters

O&M Low CSUDH Identified 10/25/11 Closed Repaired

6 AHU-2 Supply fan/motor middle belt is loose (slack observed)

9/17/08 DCN Pre-Investigation Apply proper tension to belt or replace if necessary

Repair High CSUDH Identified 10/25/11 Closed Repaired

7 AHU-2 No display on supply fan VFD's LCD screen

9/17/08 DCN Pre-Investigation Fix VFD's LCD screen Repair High CSUDH Identified 10/25/11 Closed Repaired

8 AHU-3 One section of filter fell off 9/16/08 DCN Pre-Investigation Reinstall filter O&M Low CSUDH Identified 10/25/11 Closed Repaired9 AHU-3 CHW coils look dirty 9/16/08 DCN Pre-Investigation Clean CHW coils O&M Low CSUDH Identified 10/25/11 Closed Repaired

10 AHU-3Loose supply fan/motor belts (belts can be seen wobbling up and down) 9/17/08 DCN Pre-Investigation

Apply proper tension to belts or replace if necessary Repair High CSUDH Identified 10/25/11 Closed Repaired

11 AHU-3 Loose return fan/motor belts 9/17/08 DCN Pre-Investigation Apply proper tension to belts or replace if necessary

Repair High CSUDH Identified 7/27/09 Closed Repaired

12 AHU-3 High pitch noise can be heard at return fan motor during operation

9/17/08 DCN Pre-Investigation Lubricate motor and Inspect bearing (replace if necessary)

Repair Medium CSUDH Identified 10/25/11 Closed Repaired

13 AHU-3

Return Fan immediately tripped when attempted to reduce speed manually (VFD was running at 44 Hz before tripping); "overbraking" and code "06F" shown on display

9/17/08 DCN Pre-InvestigationCogent energy will investigate further Repair High Cogent Identified 10/25/11 Closed Repaired

14 AHU-2&3 Air handlers run 24/7. 9/17/08 RG Pre-InvestigationSchedule air handlers to run only during normal building operating hours.

Programming High CSUDH Identified 10/25/11 Closed Repaired

15 AHU-1"Interface not communicating" message displayed on local Trane's controller

9/30/08 DCN Pre-functional testsConsult with Trane contractor and also check communication network Repair Critical CSUDH Identified 10/25/11 Closed Repaired

16 AHU-2 CHW coils look dirty 9/30/08 DCN Pre-functional tests Clean CHW coils O&M Low CSUDH Identified 10/25/11 Closed Repaired

17 AHU-2

One loose actuator on CHW valve (motor backside); additionally, the valve stem does not move with changes in CHW valve command

9/30/08 DCN Pre-functional testsReinstall actuator, motor and check control wiring and actuator's connection to the valve stem

Repair High CSUDH Identified 10/25/11 Closed Repaired

CSU Dominguez Hills / Welch Hall

Measure ActionIssue Identification Status

Reduction in Annual Spending

25%

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$108,306

Results

Pre-Investigation Baseline

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Energy Usage Category Annual Baseline Usage

Electricity (kWh/yr) 2,376,793

Chilled water (MMBtu/yr) 12,217

Hot water (MMBtu/yr) 2,908

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec0

200,000,000

400,000,000

600,000,000

800,000,000

1,000,000,000

1,200,000,000

1,400,000,000

025,00050,00075,000100,000125,000150,000175,000200,000

Monthly Energy Consumption for Welch Hall

Hot Water (Btu) Chilled Water (Btu) Electricity (kW)

BTU

kWh

Pre and Post Baseline Comparison

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Annual Energy Usage Category

Pre-Baseline Usage

Post-Baseline Usage

Energy Savings Cost Savings Percent

SavingsElectricity (kWh/yr) 2,376,794 1,808,498 568,296 $70,014 24%

Chilled water (MMBtu/yr) 12,217 8,429 3,788 $27,508 31%Hot water

(MMBtu/yr) 2,908 1,423 1,485 $10,784 51%

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec0

200,000,000

400,000,000

600,000,000

800,000,000

1,000,000,000

1,200,000,000

1,400,000,000

0

50,000

100,000

150,000

200,000

250,000

Monthly Energy Consumption for Welch Hall

Post-Implementation Hot Water (Btu) Pre-Implemenation Hot Water (Btu)Post-Implemenation Chilled Water (Btu) Pre-Implementation Chilled Water (Btu)Post Implementation Electricity (kW) Pre-Implementation Electricity (kW)

BTU

kWh

Energy Saving Measures

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Measure Number of Instances Found

Calibrate temperature sensors 4

Clean chilled water coils 2

Repair or replace non-functional valves 1

Repair or replace damper linkage or actuator

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Raise economizer lockout temperature 1

Move temperature sensor away from heat source 3

Future Improvements

1. Clean terminal unit reheat coils & re-TAB the building2. Install turning vanes to reduce fan system effects3. Implement a static pressure reset on air handling unit

controls4. Implement dual-setpoint occupancy flow at the zones

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Added Benefits of MBCx

How did this MBCx project help the campus with implementation and savings realization across campus

• Everyone in my department became much more knowledgeable of the building

• Employees saw the benefits of having things work correctly• Mechanics started to fix some of the same problems on other buildings or at

least ask when we could get money to fix other things.• Finishing an MBCx gives a moral boost to the department and momentum

to discover other savings on campus for a while

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Questions?

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