Low Temperature Latent Heat Storage Material of Cooling Characteristics According to Concentration of TMA

2010 ◽  
Vol 34 (2) ◽  
pp. 173-178
Author(s):  
Chang-Oh Kim ◽  
Hyun-Ho Chung ◽  
Nak-Kyu Chung
Keyword(s):  
Low Temperature ◽  
Latent Heat ◽  
Heat Storage ◽  
Storage Material ◽  
Latent Heat Storage ◽  
Heat Storage Material

A Study on Supercooling Characteristics of Clathrate Compounds with Concentration of TMA

2007 ◽  
Vol 544-545 ◽  
pp. 645-648
Author(s):  
Chang Oh Kim ◽  
Jin Heung Kim ◽  
Nak Kyu Chung
Keyword(s):  
Low Temperature ◽  
Phase Change ◽  
Latent Heat ◽  
Heat Storage ◽  
Storage Material ◽  
Latent Heat Storage ◽  
Phase Change Temperature ◽  
Supercooling Degree ◽  
Heat Storage Material ◽  
Change Temperature

Ice storage system that water is used as low temperature latent heat storage material, refrigerator capacity is increased and COP is decreased because refrigerator is operated at low temperature due to supercooling of water in the course of phase change from solid to liquid. This study is investigated the cooling characteristics of the TMA-water clathrate compound including TMA (Tri-methyl-amine, (CH3)3N) of 20~25 wt% as a low temperature latent heat storage material at -5°C, cooling source temperature. The results showed that the phase change temperature, the specific heat is increased and the supercooling degree is decreased as the weight concentration of TMA became higher. Especially, low temperature latent heat storage material containing TMA 25 wt% has the average of phase change temperature of 5.8°C, supercooling degree of 8.0°C and specific heat of 4.099kJ/kgK in the cooling process. Phase change temperature higher than that of water and inhibitory effect against supercooling can be confirmed through experimental study on cooling characteristics of TMA-water clathrate compound.

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