Gymnasium Air Conditioning Heating Air Distribution Simulation Study In Winter

Modern gymnasium is not only a gymnasium with sports facilities,but also a perfect air conditioning system.Because of the large space of gymnasium,the air distribution design is very important for the effective use of air conditioning.Air distribution is not only related to human comfort,but also directly affects the fairness of ball games.The latter is also the reason why the air conditioning system of gymnasium is different from that of other buildings.Therefore,it is of great significance to study the air distribution of gymnasium.Based on computational fluid dynamics,Airpak software can accurately predict air flow and heat transfer.In this paper,the air conditioning system of a university gymnasium without stand is taken as the research object,and the Airpak software is used to simulate the air distribution of air conditioning in winter.The turbulence model selects the standard k-?model under the two equation model,and other conditions are set according to the actual situation.In this paper,a comprehensive evaluation system of air distribution for gymnasiums without spectator area is proposed.The air distribution under different working conditions is evaluated by the system,and the percentage system score is given for each working condition.This paper simulates different air supply speed,air supply angle,air supply temperature difference,air supply height and other working conditions.Through the comprehensive evaluation system of air distribution,the temperature field and speed field are scored under different working conditions,and the influence of different factors on air distribution is obtained,and the best air conditioning working conditions suitable for table tennis and basketball games are proposed respectively.The results show that the best air supply angle for table tennis matches should be between0 ° and 10 ° and the air supply speed should be less than or equal to 6m / s.The air supply angle suitable for basketball match should be 0 °~30 °,and the larger the angle is,the higherthe energy utilization coefficient is,and the best air supply speed range should be 6.5m/s~7.5m/s.In table tennis condition,the larger air temperature difference can be selected to reduce the average wind speed,while in basketball condition,the air temperature difference can be 12?~14?,and the energy utilization coefficient can be increased.When the air supply height rises from 4 m to 8 m,the wind speed in the near wall area increases gradually,the wind speed in the ground area decreases gradually,and the average indoor temperature decreases.When the air supply height is 8 m,the energy utilization coefficient is slightly higher than that of 4 m and 6 m.Taking table tennis and basketball games as an example,the evaluation results of the comprehensive evaluation system of air distribution are summarized in this paper.When the air supply height in the East is 6m and the air supply height in the west is 8m,the optimal air supply parameters of air conditioning in winter are obtained.The results show that: in table tennis games,the optimal air supply parameters of air conditioning are: air supply speed ?6m / s,air supply angle 0 °~10 °,air supply temperature difference 12?~14?.In basketball match,the best air supply parameters of air conditioner are: air speed 6.5 m/s~7.5m/s,air angle 30 °,air temperature difference 12?~14? or 6?~8?.