Simulation of Thermal Comfort in Air-Conditioning Room by Aripak

Abstract

This paper studied on an air-conditioning classroom which was influenced by both cold jet and buoyancy force of heat source, and numerical simulation of indoor thermal environment of turbulence heat transfer in summer steady-state condition was carried out by using simulation software Aripak. According to two major evaluating indices of thermal comfort, simulation showed the change relation of distribution of PMV, PPD and air age in different heights in the room. The study indicated that, to make sure good thermal comfort, proper supply air parameters would make the indoor air form better backflow, shorter air age , and bring away the heat around the radiating equipments to make the radiation temperature not too high. Furthermore, the thermal comfort was not good in such areas which were near heating radiator with high temperature, around air outlets where cold air sinks and room corners where eddy flow was usually formed. However, in working area, thermal comfort distribution was uniform, air was fresh and has shorter air age, which would met the requirement. The study provided method and theoretical basis for forecasting the heat environment condition in the occupied zone, and provided very important reference value to improve the thermal environment of air-conditioning room.