| Title |
An Experimental Study on Thermal Properties of Clathrate for Cold Storage Applications |
| Keywords |
Clathrate ; 포접화합물 ; Cold storage system ; 축냉시스템 ; Phase change ; 상변화 ; Subcooling ; 과냉도 ; Thermal properties ; 열물성 ; Density variation rate ; 밀도 변화율 |
| Abstract |
The objective of this paper is to investigate the thermal properties of TMA clathrate applicable to cold storage system for building air-conditioning. Especially, the test tube experiments are performed by comparing and analyzing the temperature of phase change, specific heat and subcooling characteristic according to the variation of concentrations and temperature of heat source in TMA clathrate. The results are summarized as follows; 1) temperature of phase change is dropped as the temperature of heat source is lower, 2) the effect of subcooling suppression with about 9.3℃ is confirmed when the temperature of heat source is －10 ℃ in case of 30wt％, while the temperature of subcooling is about 0℃ when the temperature of heat source is －15℃ in case of 25, 29wt% and 30wt％. Thus, the effect of subcooling suppression is greater as the temperature of heat source is lower.
Additionally, the concentrative study is needed on mass concentration causing the phase change without subcooling phenomenon when the temperature of heat source is －15℃. Thus, it is concluded that TMA clathrate has proper properties as the cold storage medium for building air-conditioning. |