The Simulation Research of Non-steady Thermal Comfort of Railway Station
|School||Huazhong University of Science and Technology|
|Course||Heating,Gas Supply, Ventilation and Air Conditioning Engineering|
|Keywords||Railway station house Thermal comfort Numerical Simulation Non - steady-state conditions RNG model|
In recent years, with rail transport in the development of our strong because of its convenience , more and more people choose to train as a long - distance transport . With the improvement of the quality of life at the same time , the health of the indoor environment of the railway station house comfortable and showed more desire , thermal comfort room of the railway station has increasingly become a necessity . Numerical simulation study method has been widely used in the large space building air conditioning . Compared to the experimental research methods , numerical simulation method is not only short- cycle , cost less, but also makes the simulation method is more flexible to facilitate multi- program comparison , the reduction of the experimental conditions . In the 21st century , with the rapid development of computer and numerical simulation technology matures , CFD computer simulation to predict the airflow of the air-conditioning systems of large space organization is more and more applied to actual engineering design work , this work has gradually become an important part. North Station in Guiyang , the thermal comfort of their non - steady state conditions . First, this paper apply Designbuilder software , dynamic energy simulation Guiyang North Station , were calculated design day in summer and winter design day energy consumption , and a simple analysis . Airpak software and applications to the RNG model numerical simulation on the northeast corner of the waiting room , the use of the Fluent software post-processing module visualization of the simulation results , the cross-section of the various characteristics of the temperature distribution , and the distribution of the velocity distribution and the PMV values ??. Simulation , select the two air supply , a fixed supply air temperature difference , variable air velocity , and another is scheduled to air velocity variable supply air temperature difference . Corresponds to the air supply , respectively, of the design day in summer and winter design day simulation , and the simulation results are analyzed and compared , and come to the advantages and disadvantages of the two air supply . A long time, China 's railway stations thermal comfort studies are carried out in steady state conditions , very little research for non - steady-state conditions . Achieve thermal comfort numerical simulation of the dynamic of the railway station house , the experimental methods and analytical tools available for future reference .