3A26 Modeling of thermal environment and evaluation of thermal comfort in railway vehicle cabin by CFD and human thermal model(Customer Environment)

抄録

There had been certain passenger complaints, the factor of which was assumed to be temperature irregularity in train cabins. To improve this, it was necessary to simulate conditions within the passenger cabin in the design phase. This simulation technology had been recently used. In this study, simulation of the thermal environment in the cabin of a commercial train by simulation using the computation fluid dynamics (CFD) analysis and the human thermal model was conducted to achieve a comfortable thermal environment in the cabin of a commuter train. Psychological response under the environment was predicted as well; and the respective precision of reproduction and predictability were verified. As a result of comparing the measured values with the calculated values of the thermal environment in the cabin, it was found to be possible to reproduce the interior wind speed, temperature and humidity that changed in time series with precision required for the prediction of thermal sensation. And, the error in predicted thermal sensation from the reproduced value of thermal environment was one on a scale of nine. From the above, it was confirmed that the thermal environment of the cabin of a commuter train with passengers could be simulated, and that thermal sensation under such an environment could be predicted with practical accuracy.