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http://dx.doi.org/10.7836/kses.2011.31.5.041

Freeze Protection for Passive Solar Water Heating System in Bitter Cold Areas  

Kwon, Jae-Wook (Dept. of Mechanical Eng, Graduate School, Kyung Hee University)
Kim, Jong-Hyun (Dept. of R&D, KTENG)
Hong, Hi-Ki (Dept. of Mechanical Eng, Kyung Hee University)
Publication Information
Journal of the Korean Solar Energy Society / v.31, no.5, 2011 , pp. 41-46 More about this Journal
Abstract
In the present work, a new freeze protection method has been proposed for a natural circulation system of solar water heater. Though electrothermal wire is popularly used for the purpose, there are freezing troubles by wire cut-off and excessive electric power consumption. In the experimental device, hot water in a storage tank was circulated by a small pump and used to heat the outdoor pipes if the cold water pipe surface temperature falls lower than a set point. As a result, It was observed that there was no hot water waste while the solar water heating system operated without freeze and burst.
Keywords
Solar thermal energy; Freeze protection; Natural circulation; Hot water tracing technique; Circulation pump;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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2 KEMCO, 2008, Solar Energy, BooksHill.
3 Kim, S. S. and Hong, H., 2008, Measures and proposal for Korean solar water heating system, Korean J. of Air-Conditioning and Refrigeration Engineering, Vol. 20, No. 9, pp. 631-636.
4 Duffie, J. A. and Beckman, W. A., 1991, Solar Engineering of Thermal Processes 2nd ed., Joha Wiley & Sons, p. 489.