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정낙규(Nak Kyu Chung),김진흥(Jin Heung Kim),정종헌(Chang Oh Kim),김창오(Jong Hun Chung),강승현(Seung Hyun Kang) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.11
The objective of this study is to investigate the effect of supercooling repression on the clathrate compound by adding additives. For this purpose, phase change temperature and supercooling were measured when additives added to TMA30wt% clathrate for heat source temperature of -6℃. The experimental results show that the phase change temperature with the chloroform of 0.1wt% is higher by 0.3C than TMA30wt% and the supercooling with the surfactant 0.1 wt% is reduced by 9.2℃.
TMA 포접화합물에 첨가제를 첨가한 경우의 열물성에 관한 연구
김창오,강승현,김광일,정종헌,정낙규,김진흥 조선대학교 에너지.자원신기술연구소 2003 에너지·자원신기술연구소 논문지 Vol.25 No.2
TMA clathrate that is used as PCM of low temperature thermal storage system in this research creates hydrate crystallization at higher temperature than pure water, and its application is expected as PCM because of comparatively big latent heat without phase separation phenomenon. Ethylene Glycol is used as additive and evaluated experimentally for the purpose of the improvement in subcooling of TMA clathrate. In view of the results so far achieved subcooling is improved, the running time of the refrigerator is reduced. Thus the results are expected to use for the increase of coefficient of performance of low temperature thermal storage system in the building.