도시철도 전동차의 인버터시스템 냉각을 위한 밀폐식 히트펌프 냉각시스템 성능평가에 관한 실험연구

초록

The purpose of this research is on the performance analysis of the closed-circuit heat-pump cooling system for the cooling of an inverter of a METRO EMU. The existing open-circuit inverter cooling system has serious effect on the fault problem of the inverter mainly due to the particles induced into the cooling chamber. To solve this problem, the open-circuit inverter cooling system was redesigned and modified to the closed-circuit system with the heat-pump cooling system. In this experimental system, the cooling performance of the new inverter cooling system was conducted. From the experiments, it was found that about 8% of electric energy was saved with the new cooling system.