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Title:
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Outdoor performance of uncovered PV/thermal panels
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Author(s):
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Published by:
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Publication date:
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ECN
Energy in the Built Environment
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1-6-2004
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ECN report number:
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Document type:
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ECN-RX--04-070
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Conference Paper
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Number of pages:
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Full text:
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5
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Download PDF
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Presented at: 19th European Photovoltaic Solar Energy Conference and Exhibition, Paris, France, 7-11 juni 2004.
Abstract:
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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