DocumentCode :
2920627
Title :
Optimizing roof-integrated photovoltaics: a case study of the PowerGuard roofing tile
Author :
Dinwoodie, Thomas L. ; Shugar, Daniel S.
Author_Institution :
Powerlight Corp., Berkeley, CA, USA
Volume :
1
fYear :
1994
fDate :
5-9 Dec 1994
Firstpage :
1004
Abstract :
This paper describes the development and implementation of a building-integrated photovoltaic (PV) roofing tile system that provides grid-connected electric power to buildings. The PV roofing tile system, together with waterproof membrane, insulation, and electrical interconnection, is called PowerGuard. PowerGuard is one of the first PV roofing systems for flat and moderately-sloped commercial buildings that replaces conventional roof materials without requiring membrane penetrations and mechanical fastening to building structures. When evaluated as a PV system, the building integration reduces the cost of a PowerGuard system by 14% to 26% rather than incurring a structural mounting cost of 18% to 22% to conventionally fasten the system. Data are reported from a 3.0 kW PowerGuard prototype operating in Folsom, California, USA. The PowerLight Corporation supplied the system using large-area amorphous silicon modules manufactured by Advanced Photovoltaic Systems, Inc. Performance data indicates the system is exceeding contractual requirements. Sensitivity analysis, based upon performance, installed costs, and supplier data, indicates: (1) a marginal economic advantage to tilting the PV array; (2) a marginal economic impact of increased PV efficiency; and (3) economies-of-scale which make PowerGuard systems economical today for commercial customers in sunny areas who pay high electricity rates
Keywords :
building; economics; photovoltaic power systems; semiconductor device manufacture; solar cell arrays; solar cells; 3 kW; PowerGuard PV roofing tile; Si; building-integrated PV power systems; economic advantage; economies-of-scale; efficiency; electrical interconnection; electricity rates; insulation; large-area amorphous solar cell modules; waterproof membrane; Biomembranes; Building integrated photovoltaics; Costs; Dielectrics and electrical insulation; Joining processes; Photovoltaic cells; Power generation economics; Power system interconnection; Power systems; Tiles;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Photovoltaic Energy Conversion, 1994., Conference Record of the Twenty Fourth. IEEE Photovoltaic Specialists Conference - 1994, 1994 IEEE First World Conference on
Conference_Location :
Waikoloa, HI
Print_ISBN :
0-7803-1460-3
Type :
conf
DOI :
10.1109/WCPEC.1994.520130
Filename :
520130
Link To Document :
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