9.4 : High Performance Buildings




9.4.5 Case Study, The Thermal Test Facility, National Renewable Energy Laboratory, Golden, Colorado
(Office/Laboratory)
Building Design
Floor Area: 10,000 SF Floors(1): 2 Aspect Ratio: 1.75
Offices Laboratories Conference Room Mechanical Level
Shell
Windows
Material U-factor SHGC(2)
Viewing Windows: Double Pane, Grey Tint, Low-e 0.42 0.44
Clerestory Windows: Double Pane, Clear, Low-e 0.45 0.65
Window Area(SF)
North 38
South(3) 1,134
East 56
West 56
Wall/Roof
Material Effective R-Value
North Wall Concrete Slab/Rigid Polystyrene 5.0
South/East/West Steel Studs/Batt Insulation/Concrete 23.0
Roof: Built-up/Polyisocianurate Covering/Steel Supports 23.0
HVAC
VAV air handling unit
Hot water supply paralell VAV boxes
Direct and Indirect evaporative cooling system
Single zone roof top unit(4)
Hot Water Coil(4)
Lighting Power Densities(W/SF)
Interior Overhead: 0.73 Exterior: 0.05
Emergency: 0.02 Building: 0.80
Energy/Power
Net Annual Energy Usage (kBtu/SF*year): 23.02
Note(s): 1) That second floor is actually and mechanical mezzaine level. 2) Solar heat gain coefficient 3) Includes 492 SF of viewing windows and 642 SF of clerestory windows. 4) Only used to handle the conference room.









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Sources:

NREL, Evaluation of the Energy Performance and Design Process of the Thermal Test Facility at the National Renewable Energy Laboratory, February 2005, p. 29-54

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