혹한기 지역에서의 자연순환형 태양열 시스템 동파방지
Freeze Protection for Passive Solar Water Heating System in Bitter Cold Areas
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초록
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.
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.
참고문헌 (4)
- KEMCO, "SolarEnergy" (2008), BooksHill
- 김성수, "한국형 태양열 온수급탕 시스템의 대책과 제안", 설비공학 논문집, 20(9), pp.631~636 (2008), 대한설비공학회
- Duffie,J.A, "SolarEngineeringofThermalProcesses 2nded", pp.489~ (1991), JohaWiley& Sons
- Kim,J.H, "Verificationexperimentonfreeze protectionforsolarhotwatersystem", Korean J.ofAir-ConditioningandRefrigeration Engineering, 23(5), pp.327~333 (2011)