Effect of Relative Height between Water Tank and Collector on Performance of Thermosyphon Solar Water Heater


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The effect of relative height between the bottom of the tank and the top of the collector on performance has been studied both theoreticaly and experimentally. According to the national testing standard methods, the efficiency of the system was tested. The results show that the simulation results are in good accordance with the experimental ones. The data indicate that the optimum value of relative height is 0.74m with the maximum efficiency of 67.7% for the system with a total area of 1.5m2 and storage water tank capacity of 120L. Increasing or decreasing the relative height within a range of 0.3m has no significant effect on thermal efficiency.



Edited by:

Dongye Sun, Wen-Pei Sung and Ran Chen




S. X. Wei et al., "Effect of Relative Height between Water Tank and Collector on Performance of Thermosyphon Solar Water Heater", Applied Mechanics and Materials, Vols. 71-78, pp. 2736-2739, 2011

Online since:

July 2011




[1] H. AFIF. Thermosyphon solar water heaters: effect of storage tank volume and configuration on efficiency. Energy Conversion and Management, 1997, 38(9): 847-854.

DOI: https://doi.org/10.1016/s0196-8904(96)00099-4

[2] A.M. Shariah, G.O.G. LOF. The optimization of tank-volume-to-collector-area ratio for a thermosyphon solar water heater. Renewable Energy, 1996, 7(3): 289-300.

DOI: https://doi.org/10.1016/0960-1481(95)00132-8

[3] A.M. Shariah, D.C. Hittle, G.O.G. LOF. Computer simulation and optimization of design parameters for thermosyphon solar water heater. ASME Int. Solar Energy Conf. San Francisco, CA, USA, 27-30 March 1994 pp.393-399.

[4] Q.S. Liu, Y. Zhang, W.F. Gao, et al. Design of spontaneous cycle solar powered flat-plate water-heating system with bigger area. Energy Engineering, 2001, 5: 25-27.

[5] J.P. Gao, S.Q. Wang, C.H. Ji, et al. Analysis and calculation of tank height difference for domestic circulation solar water heater. Shangdong Energy, 2003, 3: 8-11.

[6] J.A. Duffie, W.A. Beckman. Solar Engineering of Thermal Processes. Wiley. NewYork, (1991).

[7] Solar Energy Laboratory, University of Wisconsin-Madison. TRNSYS - a transient simulation program user's manual. (2007).

[8] G.L. Morrison, J.E. Braun. System modeling and operation characteristics of thermosyphon solar water heaters. Solar Energy, 1985(34): 389-405.

DOI: https://doi.org/10.1016/0038-092x(85)90051-9