Study on the experimental simulation of solar load and passenger load in passenger cabin

초록

Thermal discomfort in a train is one of the main complaints from the passengers. Especially, the performances of air-conditioning units are getting more important because the expectation of passengers about the thermal comfort is getting higher. In order to prevent these complaints, climatic tests are widely used to test the performance of heating, ventilation, and airconditioning unit in many countries. With this climatic test, the experimental simulation of solar load and passenger load in passenger cabin is prerequisite. Solar load can be simulated by lamps from outside, or heaters inside the cabin. Sensible load of passenger load can be simulated by heaters inside the cabin. Latent load of passenger load can be simulated by humidifiers inside the cabin. These loads can be calculated from the designed specification of the train. However, the experimental setup of these loads is very difficult. In this study, solar load and passenger load were simulated by heaters and humidifiers, and their effects on the temperature and humidity inside the cabin was studied. The differences between the calculated values and measured values could be found from this experiment. This study can be helpful for the more accurate simulation of solar load and passenger load during the climatic test.