全空气空调系统室内环境及热舒适性模拟研究

Simulation Research on Indoor Environment and Thermal Comfort of Total Air Conditioning System

摘要: 全空气空调系统根据空气来源可以分为直流式系统，一次回风系统和二次回风系统。本文采用计算流体力学(CFD)数值模拟方法，分别模拟直流式系统、一次回风系统和二次回风系统对室内环境的影响，研究三种空调系统对预测平均热感觉投票PMV的影响。通过对室内气流组织，温度场，相对湿度场和热舒适性的分析，结果表明，直流式系统中，新风和室内空气混合程度高于回风式空调系统；二次回风系统室内温度最高，加热效果最好。在回流区，二次回风系统的PMV指标最高，根据人体热感觉指标，二次回风系统更舒适。

Abstract: All-air conditioning systems can be divided into DC air conditioning systems, primary return air conditioning systems and secondary return air conditioning systems according to the air source. In this paper, the computational fluid dynamics (CFD) numerical simulation method is used to simu-late the influence of the DC air conditioning system, the primary return air conditioning system and the secondary return air conditioning system on the indoor environment, and study the effects of the three air conditioning systems on predicting the average thermal sensation vote PMV impact. Through the analysis of indoor air distribution, temperature field, relative humidity field and thermal comfort, the results show that the mixing degree of fresh air and indoor air in the DC air conditioning system is higher than that of the return air conditioning system; the indoor tempera-ture of the secondary return air conditioning system The highest, the heating effect is the best. In the return area, the PMV index of the secondary air-conditioning system is the highest. According to the thermal sensation index of the human body, the secondary air-conditioning system is more comfortable.