Clinical Teaching Facility: The Prescription for Energy Savings
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Transcript of Clinical Teaching Facility: The Prescription for Energy Savings
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Clinical Teaching Facility:
The Prescription for Energy Savings
Tim Rielly, Facilities Manager Hillcrest &Tavis Werts PE, EnerNOC Project Manager
UC San Diego
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2004
2005
2006
2007
2008
2009
2010
2011
2012
-
2,000,000
4,000,000
6,000,000
8,000,000
10,000,000
12,000,000
14,000,000
16,000,000
18,000,000
-
0.0020
0.0040
0.0060
0.0080
0.0100
0.0120
0.0140
0.0160
0.0180 UC San Diego Greenhouse Gas Index
Total MGSF GHG tonnes / GSF-YR
Main
tain
ed
Gro
ss S
q F
eet T
on
nes/G
ross S
q F
t-Year
UCOP GOAL:Climate
Neutrality by 2025
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UC San DiegoInvestment in Energy Efficiency
Funded by utility incentives and a low interest revenue bond
Program will yield $8.9M in avoided annual energy costs from 48M kw-hr/yr reduction
In seven years, UCSD will complete $85.5M of projects, with $13.3M in incentives
2010
2011
2012
2013
(pro
ject
ed)
2014
(pro
ject
ed)
Tota
l$0
$1,000,000
$2,000,000
$3,000,000
$4,000,000
$5,000,000
$6,000,000
$7,000,000
Annual 15-Year Debt Service
Annual Savings
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Energy Efficiency Program Breakdown
Lab HVAC
Retrofits
42%
Non-Lab HVAC Retrofits
8%
MBCx25%
Data Center
3%
Lighting8%
Plug Loads &
Other3% Central Plant
Retrofits12%
Lab HVAC
Retrofits
60%Non-Lab
HVAC Retrofit
s5%
MBCx18%
Data Center
1%
Light-ing7%
Plug Loads
& Other
2%
Central Plant Retrofits
6%
by Savings by Cost
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La Jolla Campus
Hillcrest Campus
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UC San Diego’s Hillcrest Campus
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Clinical Teaching Facility
• Built in 1978• 3 Buildings - 131,000 GSF• Medical Research Labs and Office Space• 14 Air Handlers• Annual Energy Bill: $670,000
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Metering
Electricity Chilled Water Hot Water
Eight different energy feeds
required monitoring for M&V Option C:
Whole Building Analysis!
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Existing HVAC Infrastructure
• 2 Air Handlers per building plus 2 dedicated vivarium units•1 100% outside air and 1 economizer unit per building
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Implemented Improvements
•Pressure-Independent Chilled Water Valves•SAT Reset Sequence• Programming to Prevent
Simultaneous Heating and Cooling•Heating Hot Water Reset• Replace Leaking Reheat Valves• Replace and Optimize Economizers
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CTF’s New Baseline
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec0
500
1,000
1,500
2,000
2,500
3,000
3,500
4,000
0
50,000
100,000
150,000
200,000
250,000
300,000
350,000
Monthly Energy Consumption for the Clinical Teaching Facility
Pre-Implementation Hot Water (MMBtu) Post-Implementation Hot Water (MMBtu)Pre-Implementation Chilled Water (MMBtu) Post-Implementation Chilled Water (MMBtu)Pre-Implementation Electricity (kWh) Post-Implementation Electricity (kWh)
MM
Btu
kWh
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Energy Savings
Annual Energy Usage
Category
Pre-Baseline Usage
Post-Baseline Usage
Energy Savings Cost Savings
Electricity (kWh/yr) 3,514,130 3,342,003 172,127 $13,770
Chilled water (MMBtu/yr) 23,746 12,704 11,042 $91,980
Hot water (MMBtu/yr) 20,254 7,581 12,673 $115,324
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Best Practices
•Meter Installation•Upgraded AHUs to Modern Controls•MBCx provider worked closely with CUP staff
• Buy-in from Technicians prevents overriding setpoints• Plant staff is taking the training provided and
lessons learned to repeat the process at the hospital
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Lessons Learned
• Control Vendor Contracts• Operator Acceptance of New Sequences• Economizer design• Early leak-by detection
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Ongoing Improvements
•VAV Retrofit• Continuous Commissioning• Reduction of Minimum Room Air Exchange Rates, with Air Content Monitoring• Exhaust Fan Energy Optimization Through Air Content Monitoring and/or Wind Speed Monitoring• Optimize outside air requirements