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Case StudiesPaul A. Torcellini, Ph.D., P.E.
Principal Engineer National Renewable Energy Laboratory
Associate Professor Eastern Connecticut State University
Philip Macey, AIA
National DirectorCollaboration
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Credit: Frank Ruk
NREL Office Building in Golden, C(Research Support Facility – RS
– 360,000 ft2
– 34 kBtu/ft2
including datacenter
– 25 kBtu/ft2
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Measured Versus Modeled Monthly and Cumula
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
M o d e l
R S F
P V
M o d e l
R S F
P V
M o d e l
R S F
P V
M o d e l
R S F
P V
M o d e l
R S F
P V
M o d e l
R S F
P V
M o d e l
R S F
P V
M o d e l
R S F
P V
M o d e l
R S F
P V
M o d e l
R S F
P V
M o d e l
R S F
P V
October 2010
November 2010
December 2010
January2011
February2011
March2011
April2011
May2011
June2011
July2011
August2011
S
M o n t
h l y E U I ( k B t u / f t 2 )
PV
Data Center
MechanicalSystemsPlug Loads
Lighting
Heating
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NREL PIX 17986
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NREL PIX 17411, 17
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NREL PIX 18780
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TD Bank Branch Office (Florida
• 2015Consumption 104,487 kWh
PV Generation 106,100 kWh
• 2014Consumption 102,485 kWh
PV Generation 106,953 kWh
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K-12 Schools
Site EU
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Photo courtesy Kenton County
Turkey Foot Middle School• Replacement School
• Twice the size
• Old EUI: 72 kBtu/ft2
• New EUI: 25 kBtu/ft2
• 443 kW of PV
• Construction: $200/ft2 inc. PV• 59.4% energy cost savings