辐射耦合空调系统的局部热舒适实验研究及仿真分析

为研究辐射冷板与独立新风耦合系统下人体局部热舒适,以长沙某住宅小区某用户房间为研究对象,进行了实验研究;并对该热环境相关参数进行仿真分析。通过实测数据与仿真数据对比,从辐射温度不对称、室内气流分布、人体垂直温差和地面温度四个方面定量分析了辐射耦合空调系统的热舒适环境。同时,通过多表面模型与离散坐标模型模拟结果的对比,分析了两种辐射模型的适用性。结果表明:在采用辐射冷板+独立新风空调系统而且空间包含人体热源的情形下,DO辐射模型的仿真结果更接近实验测试结果;室内测试及仿真结果符合ASHRAE对局部热舒适的标准要求;利用CFD仿真方法可以对局部热舒适进行较准确的分析。

Experimental Study and Simulation Aanalysis of Local Thermal Comfort of Radiant Cooling Plate Coupled Dedicated Outdoor Air System

In order to accurately research the local thermal comfort of the radiant cooling plane coupled dedicated outdoor air system, a room in a residential area of Changsha was taken as the experimental object and the thermal environment was simulated. The thermal comfort of the radiation coupled air-conditioning system is analyzed from the aspects of asymmetric radiation temperature, indoor air flow distribution, vertical temperature difference of human body and ground temperature quantitatively by comparing the measured data with the simulated data. Meanwile, the applicability between S2S radiation model and DO radiation model was analyzed. It was found that DO Model results was in good agreement with the experimental results where the radiation cold plate with DOAS air conditioning system is adopted and human are contained. The results of indoor test and simulation meet ASHRAE"s standard for local thermal comfort which could be more accurate with CFD simulation method.