| Title |
The Study on Cooling Characterics of TMA Clathrate with Ethanol |
| Keywords |
Clathrate ; 포접화합물 ; Cold storage medium ; 축냉재 ; Phase change ; 상변화 ; Subcooling ; 과냉도 ; Thermal properties ; 열물성 |
| Abstract |
The purpose of this study is to investigate the propriety of TMA clathrate as a cold storage medium. Particularly, this is to examine the extent of subcooling improvement when the additives is added to the TMA clathrate, because water used for cold storage material has low phase change temperature and subcooling. This study has been analyzed and compared pure water with TMA 30wt% clathrate how phase change temperature, subcooling and specific heat in the various concentrations are changed. This results prove low phase change temperature and subcooling control effect when the ethanol is added to the TMA 30 wt% clathrate than the TMA 30wt% clathrate. In addition, it results low specific heat when there is added to the TMA 30wt% clathrate over 0.5wt% ethanol in the cold heat source temperature under －7℃. The other side, it results high specific heat when the ethanol is added in it at the cold heat source temperature under －5℃. Therefore, it is found that the additive must be controlled by available solution limit and study for new additive must be lasted to know its effect. |