大空间下送风分层空调夏季热湿环境模拟研究

Simulation on Thermal and Humidity Environment of Large-space Building With Low-sidewall Air Supply Stratified Air Conditioning

将某大空间数控机床实习区作为对象,利用实验和数值模拟方法对下送风分层空调室内垂直温湿度分布进行了研究。研究发现:在室内有湿扰量时,考虑热湿传递的模拟结果比仅考虑热传递的模拟结果降低了模拟误差,同时提供了仅考虑热传递无法得到的室内垂直湿度分布。在此基础上,模拟了有空调和无空调时不同围护结构散湿量和不同室外相对湿度的渗透风对室内温湿度的影响。结果显示,在常规范围内,无空调环境的室内温度分布受湿扰量的影响要大于空调环境的影响;无论是空调环境还是非空调环境,上部区域温度受影响程度要大于下部区域;室内温湿度受室外渗透风湿扰量的影响要远大于围护结构散湿扰量的影响。对自然通风条件下的室内环境进行模拟后发现其影响更大,室内垂直方向上的温度可相差2℃多。

Taking a large-space computerized numerical control machine zone as the study object,the indoor vertical temperature and humidity distribution with low-sidewall air supply stratified air conditioning was studied by experimental and numerical simulation methods.In the case of indoor moisture disturbance,the simulation considering both heat and moisture transfer can reduce the simulation error compared with the simulation considering heat transfer only.It can also provide indoor vertical humidity distribution which cannot be obtained by the simulation considering heat transfer only.Then,the paper studied the influence of different moisture dissipation of enclosure and different outdoor air relative humidity on indoor vertical temperature and humidity with air conditioning running and off.The results show that the indoor air temperature distribution without air conditioning is more affected by moisture disturbance than with air conditioning.Regardless of the environment with air conditioning or non-air conditioning,the air temperature of upper zone is more affected by moisture disturbance than the lower zone.The influence of air infiltration relative humidity is far greater than the moisture dissipation of enclosure.In the end,the indoor thermal environment under natural ventilation was simulated,and it found that the indoor vertical temperature could vary by 2℃.