The overall performance rating of a thermosyphon solar water heater should take into consideration its heat removal efficiency during the system application phase. This study employs a precise on-line operation to first identify physical heat removal patterns of a thermosyphon solar water heater, and then develops an empirical model for deriving its characteristic heat removal efficiency. This empirical model is in the form of a logarithmic curve, and has a high data correlation coefficient of 0.889 to 0.967. Based upon the empirical model, this study defines a characteristic heat removal efficiency parameter for thermosyphon solar water heaters. Finally, this study establishes a storage tank design method which enables the characteristic heat removal efficiency of the complete system to be optimized.
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e-mail: changjm@ms76.hinet.net
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August 2004
Technical Papers
Characteristic Heat Removal Efficiency for Thermosyphon Solar Water Heaters During the System Application Phase
J. M. Chang
e-mail: changjm@ms76.hinet.net
J. M. Chang
Department of Mechanical Engineering, Far East College, No. 49, Chung-Hwa Road, Hsin-Shih Town, Tainan County, 744, Taiwan
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J. M. Chang
Department of Mechanical Engineering, Far East College, No. 49, Chung-Hwa Road, Hsin-Shih Town, Tainan County, 744, Taiwan
e-mail: changjm@ms76.hinet.net
Contributed by the Solar Energy Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF SOLAR ENERGY ENGINEERING. Manuscript received by the ASME Solar Energy Division July 2003; final revision February 2004. Associate Editor: V. C. Mei.
J. Sol. Energy Eng. Aug 2004, 126(3): 950-956 (7 pages)
Published Online: July 19, 2004
Article history
Received:
July 1, 2003
Revised:
February 1, 2004
Online:
July 19, 2004
Citation
Chang, J. M. (July 19, 2004). "Characteristic Heat Removal Efficiency for Thermosyphon Solar Water Heaters During the System Application Phase ." ASME. J. Sol. Energy Eng. August 2004; 126(3): 950–956. https://doi.org/10.1115/1.1753576
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