Experimental investigation on thermal performance of thermosyphon flat-plate solar water heater with a mantle heat exchanger |
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| Authors: | Jinbao Huang Shaoxuan Pu Wenfeng Gao Yi Que |
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| Affiliation: | 1. College of Power Engineering, Chongqing University, Shapingba, Chongqing 400030, China;2. Solar Energy Research Institute, Yunnan Normal University, Kunming 650092, China |
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| Abstract: | The thermal performance of thermosyphon flat-plate solar water heater with a mantle heat exchanger was investigated to show its applicability in China. The effect on the performance of the collector of using a heat exchanger between the collector and the tank was analyzed. A “heat exchanger penalty factor” for the system was determined and energy balance equation in the system was presented. Outdoor tests of thermal performance of the thermosyphon flat-plate solar water heater with a mantle heat exchanger were taken in Kunming, China. Experimental results show that mean daily efficiency of the thermosyphon flat plate solar water heater with a mantle heat exchanger with 10 mm gap can reach up to 50%, which is lower than that of a thermosyphon flat-plate solar water heater without heat exchanger, but higher than that of a all-glass evacuated tubular solar water heater. |
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| Keywords: | Solar water heater Mantle heat exchanger Thermal performance |
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