Heat-transfer enhancement in double-pass flat-plate solar air heaters with recycle

C.D. Ho, H.M. Yeh and R.C. Wang

Energy, 2005, vol. 30, issue 15, 2796-2817

Abstract: This work theoretically and experimentally investigates a device for inserting an absorbing plate into the double-pass channel in a flat-plate solar air heater with recycle. This method substantially improves the collector efficiency by increasing the fluid velocity. The results are represented graphically and compared with a downward-type single-pass solar air heater. Considerable improvement in heat transfer is obtainable by employing recycle-type double-pass devices instead of single-pass devices or a conventional double-pass heater with the same flow rate. The absorbing plate location influence on heat-transfer efficiency enhancement and the hydraulic dissipated power increment is also discussed.

Date: 2005
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Citations: View citations in EconPapers (34)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:30:y:2005:i:15:p:2796-2817

DOI: 10.1016/j.energy.2005.01.006

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