An Analysis Of The Airstream Patterns In The Match Hall And Central Air-conditioning Designed For A University Stadium

For a modern gymnasium, not only construction figure is aesthetic and kinds of sports facilities are available, but also create a good indoor artificial environment. The competition will be required to ensure the temperature, humidity, wind speed, for the players and create the conditions for success; also for the health of the viewing audience with a more comfortable environment, thus suitable air temperature, humidity, wind speed, quantity of fresh air, clean and noise standards are provided. Sports hall (including competitions and the audience area) is a core component of the role of air conditioning. Air distribution in the competition hall is the most important means to meet the artificial environmental requirements.Numerical simulation model is widely used in air flow in the stadium, as to the current domestic study, lacking of large-scale field tests in research. Field measurement study is necessary, however, the test is carried out under actual operating conditions, that comes to the numerical data are true, which is incomparable to any simulation studies. And by this method, real problems of air-conditioning systems can be discovered, as well, accumulate the test data for the simulation to improve the accuracy of simulation.In this paper, competition and audience areas are air-conditioned in the form of districted air-conditioning. Side short vents are used to cover the competition area and long-range side swirl diffusers are used to cover the audience area. Air return grilles are installed in sidewalk level and back hallway wall. Air is sent from top to bottom and then removed from the air return grilles.In addition, system research is carried out on the wind and water system, the muffler and the fire protection and smoke control system of the sports hall, which includes air conditioning load calculation, choice of cold and heat sources, layouts of duct, pipe, and the use of jet air distribution formula to predict the competition hall.This paper also by measuring the temperature and velocity distribution as well as noise level of working area in the sport hall under the non-isothermal air supply conditions, combined with measured results, analyses the airflow comfort, what is compared with prediction by the jet formula.From the test results, all regions of the temperature is more satisfactory and in line with the basic jet prediction formula. Uniform temperature is available in competition area and wind speed satisfies big-ball competition, but as to the small-ball tournaments, to meet the stringent requirements, two jets should be shut down.Although the temperature distribution organized meets the design requirements, the average temperature is a little higher, what will influence the comfortable feeling of spectators and athletes during intense competition.