수소충전소용 프리쿨러를 위한 수소가스 냉각에 관한 연구

In the hydrogen refueling station (HRS), it is need the pre-cooling system (PCS) to limit the inside temperature (85℃) of the onboard thank (700 bar) and to charge the hydrogen at short time (within 3 minutes) to fuel cell electric vehicle (FCEV). From those safety reasons, the temperature of hydrogen gas must be controled -33℃ to -40℃ in PCS. The cooling test of the gaseous (N2, He, H2) was carried out using heat exchanger (pre-cooler) by indirect cooling and direct cooling method. It was confirmed that the temperature of hydrogen gas had below -40℃ at below -75℃ of chiller temperature in direct cooling.