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Investigation on the Optimum Volume-Filling Ratio of a Loop Thermosyphon Solar Water-Heating System.
- Source :
-
Journal of Solar Energy Engineering . Aug2016, Vol. 138 Issue 4, p1-10. 10p. - Publication Year :
- 2016
-
Abstract
- Volume-filling ratio of the working fluid has a predominant effect on the system performance of a closed two-phase solar water-heating (SWH) system. To study this effect, a prototype of a loop thermosyphon SWH system, which uses remolded flat-plate solar collector as the evaporator and the coil pipe in the water tank as the condenser, was set up. A set of long-term outdoor experiments under 10%, 20%, 30%, 50%, and 70% volume-filling ratios were conducted in this paper. R600a was used as working fluid. Loop thermosyphon solar collector thermal performance and system thermal performance under different volume-filling ratios, including the temperature distribution of loop thermosyphon evaporator, were presented. It is shown that the loop thermosyphon solar collector and the system had a better thermal performance than the conventional ones under 30% and 50% volume-filling ratio, and the loop thermosyphon evaporator had an even temperature distribution when the volume-filling ratio was higher than 30%. The optimum volume filing ratio lies in between 30% and 50% of the whole system volume. [ABSTRACT FROM AUTHOR]
- Subjects :
- *EVAPORATORS
*SOLAR water heaters
*THERMOSYPHONS
Subjects
Details
- Language :
- English
- ISSN :
- 01996231
- Volume :
- 138
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Journal of Solar Energy Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 121659937
- Full Text :
- https://doi.org/10.1115/1.4033403