The Simulation Research Of Non-steady Thermal Comfort Of Railway Station

In recent years, with the quick development of railway transport in China,more and more people choose the train as a long-distance transport because of its convenience. At the same time due to the improved demand of quality of life, the people also show more desire to the healthy and comfortable indoor environment of railway station. Therefore, the research of railway stations thermal comfort has increasingly become a necessity. Numerical simulation method has been widely used in the air conditioning of large space buildings. Compared to the experimental method, numerical simulation method is not only of shorter research periodic but also costs less. And due to the reduction of experimental conditions the simulation is more flexible to proceed the comparison of different experimental programs. In the 21st century, with the the rapid development of computer and the gradually mature numerical simulation technology, the technology predicting the air-conditioning organizations of large space by CFD simulation is more and more applied to many practical engineering. This work has become an important part of the design work.In this paper, Guiyang North Station's non-steady state condition of thermal comfort was studied. First, use Designbuilder energy soft to simulate the Guiyang North station's dynamic energy consumption in summer design day and in winter design day and simply analysis the simulation results. Then apply Airpak software to proceed the air-condition organization simulation of the northeast of corner of the waiting room using the RNG model and use the postprocessor of Fluent software to simulation results to obtain the characteristic cross-section of the temperature distribution, velocity distribution and distribution of PMV values. In this paper, two air supply methods are chose. One is supplying in a fixed air temperature an variable air speed, the other is supplying in a fixed air speed and variable air temperature. At last by analyzing and comparing the simulation results respectively at the summer and winter design day the advantages and disadvantages of the two supply methods were obtained. For a long time, thermal comfort research of railway station in China is carried out in steady at state conditions. There is very little for non-steady-state conditions. This paper realizes the dynamic thermal comfort numerical simulation of railway station and the experimental methods and analytical tools can be used for the future research.