Numerical Simulation Of Air Distribution And Study On Energy Efficient Optimization Of Air Conditioning In Gymnasium

In the building of gymnasium, air conditioning account a high proportion of energyconsumption in summer. Now, the gymnasium in our country mostly are the multi-purposeintegrated stadium. In different conditions, the number of audience changes a lot, whichimpact largely to the load of the air conditioning in gymnasium. We could manage andcontrol the equipment using the building intelligent control system. But, its hard to regulateall conditions for energy saving to the stadium. Air conditioning waste a lot of energy in thelow personnel load conditions. On the other hand, due to lack of the regulatory measures forthe low-cost carriers operating conditions of air conditioning system in the gymnasium, thecost of operating are high. Which makes it too difficult to open to the public, not good to thedevelopment of public sports in the society.This subject use CFD technology to research on a gymnasium in Guangzhou HigherEducation Mega Center. Firstly, study the original airflow of the gymnasium by numericalsimulation. And regulate the uneven regional of the temperature and velocity field in theplaying hall. Then verify the validity of the model and the reliability of simulation results byexperimental tests.Study the optimization of the air temperature, air flow and other parameters of the airconditioning air inlet based on the attendence of the audience. Predict and analyze thetemperature and velocity field to different attendances of the airflow in gyamnasium bynumerical simulation. Optimize the air temperature, air flow and other parameters of theair conditioning air inlet, based on meeting the personnel requirements of thermal comfortconditions(PMV-PPD). After the optimization, the indoor set temperature can be increasedto27℃, the supply air temperature can be increased to20℃in the working condition of70%attendances. According to the estimates from the reference, the energy saving rate ofthe air conditioning is9%. The indoor set temperature can be increased to28℃, the supplyair temperature can be increased to21℃in the working condition of40%and10%attendances. And the energy saving rate of the air conditioning is18.5%and23.2%. Theaverage of the energy saving rate of the air conditioning system is16.9%when the stadiumbeing used throughout the year. The energy saving effection is good. Propose an energy saving operation program to the air conditioning system of theworking conditions of opening to the public and no audience. Analyzed the cost of the smallballs and big balls working conditions in the stadium. Each opening to the public period(3hours) of the small balls working condition of the gymnasium costs less than600yuan inthe energy saving operation mode of the air conditioning. And each opening to the publicperiod(2.5hours) of the big balls working condition of the gymnasium costs less than500yuan in the energy saving operation mode of the air conditioning. Opening to the public ofthe gymnasium costs less than300yuan in transition season and in winter. The achievementcould provide a reference for the opening to public of the gymnasium.