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ECN publication
Design of a dual flow photovoltaic/thermal combi panel
Published by: Publication date:
ECN Energy in the Built Environment 1-11-2002
ECN report number: Document type:
ECN-RX--02-047 Conference Paper
Number of pages: Full text:
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Presented at: PV in Europe - From PV Technology to Energy Solutions Conference and Exhibition, Rome, Italy, 7-11 oktober 2002.

A prototype of a dual flow photovoltaic/thermal combi panel has beendesigned and built. In addition, a numerical model of this prototype has been developed, which predicts the thermal efficiency of the prototype. The model predicts a thermal efficiency at zero reduced temperature of n0 = 0.67, and a heat loss coefficient of UL = 5.3 Wm.-2K-1. The thermal efficiency has also been measured in a combined indoor/outdoor test setup, resulting in measured values of n0 = 0.70 ± 0.06 and UL = 5.1 ± 0.8 Wm-2K-1. Both values are in good agreement with the model predictions. Finally, the influence of the glass and water layers on the electrical efficiency of the prototype has been measured in a flash test. In conclusion, the dual flow photovoltaic/thermaI comhi panel has been found to perform as predicted by the model, and with a higher thermal efficiency than other combi panel concepts. However, the concept remains heavy and fragile, and is therefore in its present form not feasible for large scale applications.

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