Effect of indoor wind on temperature distribution with door opening and closing in an urban transit car during winter season

초록

During winter season, usually heaters are operated to warm the urban transit cabin in many countries. The problem with heating of the cabin is that the inflow of cold air during door opening for passengers’ boarding. Since cold air causes the significant decrease in the mean cabin temperature, more heating is required to recover the temperature drop upon the door opening. However, this heating requires the consumption of large amount of energy. In this study, the indoor air was introduced to minimize the inflow of cold ambient air into the cabin. Various wind models were simulated, and their effects on the cabin temperature were extensively studied by using a climatic chamber. It was found that the indoor wind could reduce the inflow of cold ambient air so that the temperature drop inside the cabin could be decreased in this study.