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Titel:
Outdoor performance of uncovered PV/thermal panels
 
Auteur(s):
 
Gepubliceerd door: Publicatie datum:
ECN Energie in de Gebouwde Omgeving en Netten 1-6-2004
 
ECN publicatienummer: Publicatie type:
ECN-RX--04-070 Conferentiebijdrage
 
Aantal pagina's: Volledige tekst:
5 Download PDF  (303kB)

Gepresenteerd op: 19th European Photovoltaic Solar Energy Conference and Exhibition, Paris, France, 7-11 juni 2004.

Samenvatting:
A photovoltaic/thermal (PVT) panel is a combination of photovoltaic cells with a solar thermal collector, forming one device that converts solar radiation into electricity and heat simultaneously. In general, two types of PVT can be distinguished: glass-covered PVT collectors, which produce high-temperature heat but have a slightly lower electrical yield, and uncovered PVT panels, which produce relatively low-temperature heat but have a somewhat higher electrical performance. In this work, two prototypes of an uncovered PVT panel have been manufactured. Both the electrical and thermal performance of these prototypes have been measured: the former in a flash test measurement, the latter in an outdoor test setup. The electrical module efficiency of the prototypes has been found to be 11.2%, which is as expected. The thermal efficiency at zero reduced temperature has been found to be 77%, with a heat loss coefficient of 23 W/m2K. Both these numbers are higher than could be expected based on numerical modelling performed in earlier work. A more detailed comparison is necessary to explain this differences.


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