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.
Characteristic Heat Removal Efficiency for Thermosyphon Solar Water Heaters During the System Application Phase
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.
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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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