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Monitoring-Based Commissioning Best Practices Award – Welch Hall. California State University, Dominguez Hills. June 17th, 2014. Monitoring-Based Commissioning CSU Dominguez Hills Welch Hall. Content. Project Overview Project Team Process & Implementation Major Findings - PowerPoint PPT Presentation
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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
3
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
4
Project Team
ManagementKenneth Seeton
MBCx ProviderEnerNOC
MBCx ImplementationCSU Dominguez Hills
EMCOR
On-siteCSU Dominguez Hills
Facilities Personal
5
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
6
Findings Log As A Punchlist
7
Item
Num
ber
Equi
p. N
ame
/ Tag
No
.
Issu
e De
scrip
tion
Date
Iden
tifie
d
Iden
tifie
d by
Who
m
(Initi
als)
Phas
e Id
entif
ied
Reco
mm
ende
d Ac
tion
Mea
sure
Typ
e
Prio
rity
Assi
gned
to W
hom
Targ
et A
ctio
n Da
te
Curr
ent S
tatu
s
Curr
ent S
tatu
s Da
te
Ope
n / C
lose
d
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%
8
$108,306
Results
Pre-Investigation Baseline
9
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
10
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
11
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
6
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
12
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
13
Questions?
14