Evaluation Method Of Air Distribution In Gymnasium

The design of air distribution in gymnasium is a challenging problem because of the unique features of gymnasium. Currently, there are no effective methods and space indices to evaluate the design of air distribution in gymnasium. This problem becomes more significant with the fast development of gymnasium and the upcoming 2008 Olympic Games in Beijing.Based on the review of indices relevant to air distribution, the evaluation method of air distribution in gymnasium is proposed to find an appropriate air supply mode to meet the requirements in both the game zone of and the audience zone, and to be efficient in energy saving. Major contributions of the thesis are summed as the following:The existing and commonly used indices are reviewed. The method to classify the indices is presented and the relationship among them is showed. By integrating the occupied density into the Predicted mean vote (PMV) and energy-using efficiency, the integrated PMV and revised energy-using efficiency are proposed as a new evaluation method. The method using average velocity and the ratio of unsatisfactory volume to the total volume is presented to decide the satisfactory level of velocity in the game zone. Similar approach is also applied to decide the satisfactory level of temperature and relative humidity.A new method to evaluate air distribution in gymnasium based on satisfactory level of game zone, satisfactory level of audience zone, air-exchange efficiency and energy-using efficiency and quantity score is developed to guide the selection of air supply modes.The distributions of temperature and velocity are measured in a full-scale gymnasium and the measurement data are used to validate the numerical simulation by CFD (Computational Fluid Dynamics). The validated CFD program is further applied in a 2-D model building and two gymnasiums. The applicability of evaluation method and its advantage to guide air distribution evaluation are proved.