Effect of position of upper connecting pipe on the tank on thermal performance of domestic solar water heaters with a vertical storage tank and flat-plate collectors
Zhu, Hai-wei, Gao, Wen-feng, Lin, Wen-xian, Liu, Tao, and Li, Ze-dong (2014) Effect of position of upper connecting pipe on the tank on thermal performance of domestic solar water heaters with a vertical storage tank and flat-plate collectors. Journal of Yunnan Normal University, 34 (4). pp. 20-24.
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Abstract
In this paper, the domestic solar water heater with a vertical storage tank and a flat-plate collector, which is commercially available and popular in the market, was experimentally investigated. Firstly, natural circulation experiment platform of flat plate domestic solar water heater was set up. The effect of two different positions of upper connecting pipe on temperature variation in the water tank during the heating stage in the daytime and thermal performances was measured. Through the analysis of test data, the difference of temperature stratification in the water tank with upper connecting pipe at high position and at low position were studied respectively. Also the instantaneous efficiency in 10 minutes was defined and compared. The results showed that there was better temperature stratification in the water tank when it's upper connecting pipe at high position during heating stage. In addition, the instantaneous efficiency of solar water heater, which water tank with upper connecting pipe at high location under the natural circulation condition was superior to the water tank with upper circulation pipe at low position.
| Item ID: | 38339 |
|---|---|
| Item Type: | Article (Research - C1) |
| ISSN: | 1007-9793 |
| Keywords: | flat plate domestic solar water; heat storage water tank; instantaneous efficiency; temperature stratification |
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| Additional Information: | Original paper is written and published in Chinese. |
| Funders: | National Natural Science Foundation of China, Yunnan Natural Science Foundation, China |
| Date Deposited: | 05 May 2015 00:25 |
| FoR Codes: | 09 ENGINEERING > 0915 Interdisciplinary Engineering > 091505 Heat and Mass Transfer Operations @ 60% 09 ENGINEERING > 0915 Interdisciplinary Engineering > 091504 Fluidisation and Fluid Mechanics @ 40% |
| SEO Codes: | 85 ENERGY > 8505 Renewable Energy > 850506 Solar-Thermal Energy @ 100% |
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