9.4 : High Performance Buildings




9.4.3 Case Study, The Visitor Center at Zion National Park, Utah
(Service/Retail/Office)
Building Design
Vistors Center (1): 8,800 SF Comfort Station (2): 2,756 SF Fee Station: 170 SF
Shell
Windows
Type U-Factor SHGC (3)
South/East Glass Double Pane Insulating Glass, Low-e, Aluminum Frames, Thermally Broken 0.44 0.44
North/West Glass Double Pane Insulating Glass, Heat Mirror, Aluminum Frames, Thermally Broken 0.37 0.37
Window/Wall Ratio: 28%
Wall/Roof
Materials Effective R-Value
Trombe Walls: Low-iron Patterned Trombe Wall, CMU (4) 2.3
Vistor Center Walls: Wood Siding, Rigid Insulation Board, Gypsum 16.5
Comfort Station Walls: Wood Siding, Rigid Insulation Board, CMU (4) 6.6
Roof: Wood Shingles; Sheathing; Insulated Roof Panels 30.9
HVAC
Heating Cooling
Trombe Walls Operable Windows
Electric Radiant Ceiling Panels 3 Cooling Towers
Lighting Power Densities(W/SF)
Main Area: (5)
Offices: 1.0
Bookstore: 0.9
Energy/Power:
PV System: 7.2 kW grid-tie system
Net Annual Energy Usage (thousand Btu/SF*year): 27.0
Note(s): 1) Includes office, bookstore, and service areas. 2) Restroom complex. 3) Solar heat gain coefficient. 4) Concrete masonry unit. 5) The main vistors center area is handled almost entirely with daylighting. Auxiliary fluorescent lighting is used only occasionally to supplement.









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Sources:

NREL, Evaluation of the Low-Energy Design and Energy Performance of the Zion National Park Visitors Center, Feb. 2005, p. 23-37

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