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Tech 4 - Jim StuberTechnical Session from the 2006 ASHRAE Region VI CRC
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Retro-Commissioning
60.5 Acres, 41 Buildings, 4.946 MGSF
BUILDING BUILDING PERCENT
DATE GROSS OF TOTAL
1910 to 1930 667,882 18%
1930 to 1960 884,605 23%
1960 to 1980 690,021 18%
1980 to 1990 594,524 16%
1990 to 2000 723,520 19%
2000 to Present 226,851 6%
Age of Facilities
Systems
• Constant Volume• Variable Volume• Duel Duct• Fan coils• DX• Window units
Facilities Engineering
Mission
Lower Operating Costs
Preserve Assets
Improve/MaintainCustomer Satisfaction
CSRB Energy Conservation
Project
$380k Annual Savings, 3 Year payback
West Building HVAC Issues
Staffing Retro-Commissioning
• Reduced Service Contracts• Reorganized the Maintenance
Department
Retro-Recommissioning
• Customers• Maintenance Staff
Retro-Recommissioning
• Customers• Maintenance Staff• Gather Building Data
Retro-Recommissioning
• Customers• Maintenance Staff• Gather Building Data• Calculate Heat Load
Retro-Recommissioning
• Customers• Maintenance Staff• Gather Building Data• Calculate Heat Load• Assess Deficiencies
Retro-Recommissioning
• Customers• Maintenance Staff• Gather Building Data• Calculate Heat Load• Assess Deficiencies• Document Equipment
Retro-Recommissioning
• Customers• Maintenance Staff• Gather Building Data• Calculate Heat Load• Assess Deficiencies• Document Equipment• Prioritize Work
WUSM Total Energy UsageFiscal Years 1992 - 2005
0
300000
600000
900000
1200000
1500000
En
erg
y U
sag
e (
MM
Btu
)
0
600000
1200000
1800000
2400000
3000000
Gro
ss A
rea (
SF
)
Electricity (MMBtu) Coal (MMBtu)Gas (MMBtu) Oil (MMBtu)Gross Area (SF)
Note: Includes only buildings on central systems.
• 5M Annual Savings in FY05• $26M Total Savings from FY92 - FY05
Why Are Existing Buildings Broken?
• Life of Equipment• Space Use • Budget Pressures• Organizational Change• Knowledge Base
What we’re doing about it• Facilities Renewal• Retro-Commissioning• Training• Commissioning • Equipment Standards• Design Guidelines• Controls Guidelines
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