Effects of Evaporator Length and Number of Turns of Closed-Loop Oscillating Heat Pipe on Thermal Performance of Flat Plate Solar Collector
DOI:
https://doi.org/10.14456/rmutlengj.2018.2Keywords:
closed-loop oscillating heat pipe, evaporator length, flat plate solar collector, number of turns, thermal performanceAbstract
The tested flat plate solar collector was 1´1.5 m2 in size. The closed-loop oscillating heat pipe (CLOHP) was made of a copper capillary tube and the distilled water was used as its working fluid. The effects of various parameters i.e., the solar intensity, the evaporator length of CLOHP and the number of meandering turns of CLOHP, on the thermal performance of solar collector were experimentally investigated. The solar collector was tested under the solar simulator. The halogen lamps were used to simulate the solar energy. It was found from all experiments that the thermal performance of solar collector improved with an increase in the radiation intensity. The proper evaporator length and number of turns, for which the maximum thermal efficiency of flat plate solar collector with CLOHP was about 0.6, were 1 m and 20 turns, respectively.
References
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2. He Q, Zeng S, Wang S. Experimental investigation on the efficiency of flat-plate solar collectors with nanofluids. Applied Thermal Engineering. 2015;88:165-71.
3. Esen M, Esen H. Experimental investigation of a two-phase closed thermosyphon solar water heater. Solar Energy. 2005;79(5):459-68.
4. Hussein HMS. Theoretical and experimental investigation of wickless heat pipes flat plate solar collector with cross flow heat exchanger. Energy Conversion & Management. 2007;48:1266-72.
5. Hussein HMS, EI-Ghetany HH, Nada SA. Performance of wickless heat pipe flat plate solar collectors having different pipes cross sections geometries and filling ratios. Energy Conversion & Management. 2006;47(11-12):1539-49.
6. Nada SA, EI-Ghetany HH, Hassein HMS. Performance of a two-phase closed thermosyphon solar collector with a shell and tube heat exchanger. Applied Thermal Engineering. 2004;24(13):1959-68.
7. Anon. Heat pipes-performance of two-phase closed thermosyphons. Data Item No. 81038. London: Engineering Sciences Data Unit;1981.
8. Azad E. Theoretical and experimental investigation of heat pipe solar collector. Experimental Thermal and Fluid Science. 2008;32(8):1666-72.
9. Deng Y, Zhao Y, Quan Z, Zhu T. Experimental study of the thermal performance for the novel flat plate solar water heater with micro heat pipe array absorber. Energy Procedia. 2015;70:41-48.
10. Deng Y, Zhao Y, Wang W, Quan Z, Wang L, Yu D. Experimental investigation of performance for the novel flat plate solar collector with micro-channel heat pipe array (MHPA-FPC). Applied Thermal Engineering. 2013;54(2):440-49.
11. Wei L, Yuan D, Tang D, Wu B. A study on a flat-plate type of solar heat collector with an integrated heat pipe. Solar Energy. 2013;97:19-25.
12. Faghri A. Heat pipe science and technology. Washington: Taylor & Francis;1995.
13. Akachi H, Polášek F, Štulc P. Pulsating heat pipes. In: Proceedings of the 5th International Heat Pipe Symposium, 1996, Melbourne, Australia. p. 208-217.
14. Arab M, Soltanieh M, Shafii MB. Experimental investigation of extra-long pulsating heat pipe application in solar water heaters. Experimental Thermal and Fluid Science. 2012;42:6-15.
15. Hudakorn T, Terdtoon P. Thermal performance investigation of a closed-loop oscillating heat pipe flat plate solar collector. In: Proceedings of the Second International Conference on Science, Technology and Innovation for Sustainable Well-Being, 2010, Quang Binh University, Vietnam.
16. Kargar Sharif Abed H, Ghiasi M, Jahangiri Mamouri S, Shafii MB. A novel integrated solar desalination system with a pulsating heat pipe. Desalination. 2013;311:206-10.
17. Nguyen KB, Yoon SH, Choi JH. Effect of working-fluid filling ratio and cooling-water flow rate on the performance of solar collector with closed-loop oscillating heat pipe. Journal of Mechanical Science and Technology. 2012;26(1):251-58.
18. Charoensawan P. Heat pipe technologies. Naresuan University: Department of Mechanical Engineering;2012. Thai.
19. Hirunlabh J. Solar energy thermal processes. Bangkok: King Mongkut’s University of Technology Thonburi;1998. Thai.
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Published
2019-04-10
How to Cite
กาจันทร์ ท., แตงก่อ ธ., แก้วฉัยยา ว., สีหะวงษ์ น., วิไลพล ป., & เจริญสวรรค์ ป. (2019). Effects of Evaporator Length and Number of Turns of Closed-Loop Oscillating Heat Pipe on Thermal Performance of Flat Plate Solar Collector. RMUTL Engineering Journal, 3(1), 9–17. https://doi.org/10.14456/rmutlengj.2018.2
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