| Title |
Freeze Protection for Passive Solar Water Heating System |
| Authors |
김종현(Jong Hyun Kim) ; 홍희기(Hiki Hong) ; 정재동(Jae Dong Chung) |
| Keywords |
태양열 에너지 ; 동파방지 ; 자연순환 ; 온수 트레이싱법 Solar thermal energy ; Freeze protection ; Natural circulation ; Hot water tracing technique |
| 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 shortage of excessive electric power consumption. In the experimental device, hot water in storage tank was used to heat the outlet pipe from the tank if the pipe surface temperature falls lower than a set point. The cold water pipe to the storage tank was installed to directly contact the hot water pipe, so its temperature rose by transferred heat. |