9.4 : High Performance Buildings




9.4.2 Case Study, The Cambria Department of Environmental Protection Office Building, Ebensburg, Pennsylvania
(Office)
Building Design
Floor Area: 34,500 SF Floors: 2
Open office space (1) File storage area Two small labratories Conference rooms
Break room Storage areas Two mechanical rooms Telecom room
Shell
Windows
Material: Triple Pane, low-e with Aluminum Frames and Wood Frames
Triple Pane Triple Pane
Aluminum Frames Wood Frames
U-Factor 0.24 U-Factor 0.26
Wall/Roof
Primary Material R-Value
Wall : Insulating Concrete Forms 27.0
Roof: Decking and Insulation 33.0
HVAC
Total Capacities(thousand Btu/hr)
12 Ground Source Heat Pumps 644 (2)
12 Auxiliary Electric Resistance Heaters 382 (3)
Lighting Power Densities(W/SF)
Open Office Area: 0.75
Office Area Task Lighting(4): 0.5
Energy/Power
PV System: 18.2 kW grid-tie system (5)
Net Annual Energy Usage (thousand Btu/SF*year): 36.0
Note(s): 1) Office space is for 100 people. This accounts for approximately 20,000 SF of the total building floorspace. 2) Cooling capacity 3) Auxiliary heating capacity. 4) Task lighting is in addition to the open office area LPD and is only in select cubicals and offices. 5) Includes 17.2 kW of roof PV array and two 0.5 KW ground level single axis tracking PV arrays.









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Sources:

NREL, Analysis of the Design and Energy Performance of the Pennsylvania Department of Enverionmental Proctection Cambria Office Building, March 2005, p

NREL, Lessons Learned from Case Studies of Six High-Performance Buildings, June 2006, p. 5 Table A-2 p. 130