地板辐射供冷-置换通风的实验研究

为了研究地板辐射供冷的热工性能,测试了北京地区不同室外气温下地板辐射供冷系统的运行工况,得到了该系统的制冷量,地板表面温度,室内温度场分布等参数,并且把单独地板辐射供冷系统的运行参数与地板辐射供冷-置换通风复合式系统进行了对比,提出了将地板辐射供冷与置换通风配合用于夏季空调室内供冷除湿的新型空调方式,置换通风系统在近地面处形成干燥空气层,可有效防止夏季热湿天气在地板表面出现结露现象,并且使这种新型空调系统条件下地面与室内的换热得到强化.通过理论分析和实验研究指出这是一种舒适、节能的空调方式.

Experimental Study of the Floor Radiant Cooling System Combined with Displacement Ventilation

To study the thermal characteristics of floor radiant cooling systems, running conditions of floor radiont cooling system under different outdoor temperature were tested, and these parameters of cooling quantity, floor surface temperature and indoor temperature distribution were achieved. In addition, heat transfer effect of the hybrid system was compared with that of floor radiant cooling system, and the new air conditioning system-floor radiant cooling system combined with displacement ventilation was proposed. The dry air layer near the floor formed by displacement ventilation system can effectively prevent dews on the surface of the floor in the wet and hot weather in summer, and the heat transfer effect between the floor and space was enhanced. The theoretical and experimental results indicate that the hybrid system of floor radiant cooling combined with displacement ventilation is comfortable and effective in summer.