How fenestration can significantly affect energy use in commercial buildings
This paper reports conclusions of an extensive series of computer analyses of annual energy use and electrical peak demand in two climates as functions of fenestration parameters. Particular attention is paid to daylighting and its associated energy tradeoffs. The study includes the effects of climate, orientation, glazing area, U-value, shading coefficient, visible transmittance, lighting power density, and lighting control strategy. The extensive set of parametric analyses generated in this study suggest that for a simple office module, fenestration can provide annual net energy savings in all climates if daylighting is used. Control of solar gain is critical to realization of energy benefits from daylighting. Fenestration and daylighting design strategies that reduce net annual energy consumption can also reduce peak electrical demand. The optimum combination of fenestration variables is a function of climate, orientation, and electric lighting power density.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 6814671
- Report Number(s):
- LBL-17330; CONF-840320-1; EEB-W-84-01; ON: DE84009628
- Country of Publication:
- United States
- Language:
- English
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