Numerical Simulation Study On Thermal And Moisture Environment In Gymnasium

For specific function of large space buildings like gymnasium, indoor parameters as temperature, humidity and speed are not only satisfying the staffs and spectators, but also fulfilling the request of scheduled events, because these parameters determine the quality and consequence of the match to some extent. However, it is hard to find the distributing rules of indoor thermal and moisture environment because of the characteristic of gymnasium buildings, coupled with the various factors affected indoor air. In recent years, with the development of computational fluid dynamics (CFD), using CFD technology to simulate and predict air distribution, temperature field and moisture field of gymnasium buildings'air-conditioning system has become possible.Through expatiation on CFD theory by mathematic method, the result indicates that it is feasible to simulate operation of air conditioning system in gymnasium buildings. On the basis of above, the summer thermal and moisture enviroment of a built up gymnasium in Shenyang, especially wind speed, the temperature and humidity, are simulated and analyzed in the rest papers by using CFD simulation software, combing with the method of field measure. Finally, the specific content is as follows:1. Measure and get the indoor distribution of heat and humidity, and obtain typical plane of the section by summarizing experimental datas, in the meanwhile, boundary conditions in gymnasium structure can be measured and it also provides essential datas for numerical simulation.2. By professional software named Airpak, this paper simulates seperately the three factors as booking rate, supply air angle and velocity that affect indoor thermal and moisture environment, analying and summarizing the rules. In the booking rate section, the spatial air conditioning influence generated by the process of personal moisture dissipation is the same as the process of personal radiating, and it has a higher impact on indoor air diffusion and distribution of heat and humidity in auditorium.3. Finally, according to temperature and humidity values of measure points in the movement area(within 2 meters), air conditioning modes to different booking rates can be selected by adjusting nozzle angle and air output in side given low return air conditioning system, air output in upper given upper return air conditioning system. So it is not only satisfying the audience request for heat and humidity, but also decreasing unnecessary energy loss in air conditioning system, and even achieving the purpose for energy saving. Except the 100% booking rate case, the conclusion indicates that air supply volume can be decreased by 10%.