객차의 전원 차단시 객실 온도 변화 연구

초록

Public interest on heating and cooling of cabin is increasing. Especially, abnormal weather condition makes it hard for the railroad operators to obtain the safety and comfort of passengers. Sudden failure in electric power supply may threaten the safety of rail car, as well as the lowered thermal comfort for passengers. For this reason, the change in cabin temperature upon power supply failure was requested to study by a railroad operator. In this study, the change in cabin temperature upon the power supply failure was extensively studied by using a real-scale climatic chamber. The chamber temperature was controlled to 20 ℃ with the cabin heaters operated. After reaching a stable condition in the cabin, the power was off. The cabin temperature was lowered by 16 K in an hour. After 7 h, the temperature decreased by 30 K in 7 hours. The need of good thermal insulation performance could be found out through this study.