9.4 : High Performance Buildings




9.4.4 Case Study, The Philip Merrill Environmental Center, Annapolis, Maryland
(Office)
Building Design
Floor Area: 31,000 SF Floors: 2 Footprint: 220 ft. x (1)
2 Floors of open office space
Attached pavilion containing: Meeting space Kitchen Staff dining Conference room
Shell
Windows
U-Factor SHGC (2)
Type: Double Pane, Low-e, Argon Filled Insulating Glass 0.244 0.41
Wall/Roof
Material Effective R-Value
Interior Wall plywood, gypsum, SIP foam, and sheathing 28.0
Exterior Wall gypsum and insulated metal framing 9.3
Roof plywood, gypsum, SIP foam, and sheathing 38.0
HVAC
18 ground source heat pumps
fin and tube radiators connected to a propane boiler
1 air condtioning unit
Lighting Power Densities (W/SF)
First Floor: 1.2
Second Floor: 1.6
Conference Room: 1.4
Energy/Power
PV System: 4.2 kW thin-film system
Net Annual Energy Usage (thousand Btu/SF*year): 39.9
Note(s): 1) Width varies from about 74 ft. to 59 ft. along different sections of the length. 2) Solar heat gain coefficient.









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Sources:

NREL, Analysis of the Energy Performance of the Chesapeake Bay Foundation’s Philip Merrill Environmental Center, April 2005, p. 6-24

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