저온공조용 빙축열 시스템에서의 열전달 특성에 관한 실험적 연구

초록

The basic design data which were required for development of highly efficient ice storage system with low temperature latent heat were experimentally obtained. The pure water of which the freezing point is 0℃ was filled in the system, and the Ethylene glycol(brine) was circulated through the 10 vertical tubes as a secondary fluid in order to cool the P.C.M.. Temperature conversions of P.C.M. and free convection were appeared by density difference. In order to find the effective water circulation path, we obtained P.C.M. temperature distributions of 5 parts in the storage tank during freezing process. The initial temperature of P.C.M. are 5℃, 9℃ and 14℃. And the temperatures and flow rate of working fluid are -6℃, -4℃ and 65ℓ/min, respectively.