Performance studies of a solar once-through System (OTS) combined with a phase-change temperature-controlled valve (PCTCV)

An OTS is more convenient to use and provides better temperature-controlled water than a natural circulation system. An excellent way to control the exit-water temperature of an OTS is to utilize a PCTCV. Our results show how the average water temperature changes with insolation and collector inclin...

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Bibliographic Details
Published in:Energy (Oxford) 1998-10, Vol.23 (10), p.899-906
Main Authors: Zhang, H.Y, Ge, X.S, Li, Y.F, Zhang, X.S
Format: Article
Language:English
Subjects:
Applied sciences
Energy
Equipments, installations and applications
Exact sciences and technology
Natural energy
Solar energy
Solar thermal conversion
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Summary:An OTS is more convenient to use and provides better temperature-controlled water than a natural circulation system. An excellent way to control the exit-water temperature of an OTS is to utilize a PCTCV. Our results show how the average water temperature changes with insolation and collector inclination angle. The measured collector efficiency is close to 60%, while the overall efficiency for the system including the storage tank is relatively low due to poor thermal insulation and large heat capacity of the storage tank. Calculated results agree with experimental measurements.
ISSN:0360-5442
DOI:10.1016/S0360-5442(98)00034-6