Page 32 - Zero Net Energy Case Study Buildings-Volume 1
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CASE STUDY NO. 1
PACKARD FOUNDATION HEADQUARTERS BUILDING
Renewable On-Site Energy Supply
The on-site renewable energy system, a 285 kW (DC) solar photovoltaic system, has panels lo- cated on the building roofs and at the parking canopies. The shallow roofs slope toward the east and the west, but the efficiency loss is small (estimated to be 5%-10%) compared to the optimum slope and orientation, easily compensated by the addition of a few extra panels.
Lighting
High efficiency light fixtures using T-5HO lamps were used in standard office spaces, for an average lighting power density of 0.7 watts/sq. ft. The overall design of the electric lighting fol- lows the Task/Ambient approach, namely ceiling-mounted suspended fixtures and task lighting at each workstation. This approach recognizes that less light is needed for walking around than
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Zero Net Energy Case Study Buildings: Volume 1
