碰撞射流通风供暖房间热环境实测研究
Experimental study on thermal environment in heating room with impinging jet ventilation system
摘要：
在人工气候室内，对不同送风状态下的碰撞射流通风和混合通风的供暖效果进行了实验研究，分析了送风速度和送风温度对2种通风模式供暖房间热环境的影响，并对室内热舒适性进行了分析比较。结果表明：由于碰撞射流通风热风直接送入房间底部，室内温度梯度小于混合通风模式，并且室内温度分布对送风参数变化的敏感度亦小于混合通风，这对减小建筑供暖能耗有重要意义；尽管碰撞射流在送风口附近的近地面气流速度较大，造成人员吹风感的风险大于混合通风，但在本文研究的送风参数范围内，热环境参数均在可接受的范围内。
Abstract：
In a phytotron, conducts a series of experiments to study the heating effects with impinging jet ventilation (IJV) and mixing ventilation (MV) under different air supply conditions respectively. Analyses the influences of air supply velocity and temperature on thermal environment in heating room with two ventilation modes, and compares indoor thermal comfort. The results indicate that the vertical temperature gradient in an IJV room is smaller than that in a MV room, because the downward air flow of the IJV helps in distributing the warm air down to lower levels. The temperature stratification is less sensitive to different air supply states in an IJV room than that in a MV room, and thus it has a significant impact on decreasing the heating energy consumption of buildings. The velocity is higher in lower part near the nozzle in the IJV room, which may lead to a higher draught risk than that in the MV room, but the experimental results show that the thermal environment is acceptable in the occupied zone of the IJV room during the whole test period.
Keywords:impingingjetventilation,mixingventilation,heating,thermalenvironment,airsupplyvelocity,airsupplytemperature,draught,thermalcomfort