含水层冷辐射墙面板的运行参数对温度均匀性和供冷量的影响OA

The experiment investigated the influence of operational parameters on the tem-perature uniformity and cooling capacity of the water layer radiant cooling wall panel.The heat transfer coefficient of water layer radiant panels was analyzed,along with the differ-ence in internal thermal resistance compared to air-layer radiant panels.Results indicate that the supply water temperature and air temperature significantly affect the temperature uniformity and cooling capacity of the radiant panels.The Weltens uniformity index(UI)increases with the supply water temperature and decreases with the air temperature.The temperature uniformity of the radiant panels is high,with a maximum UI of 0.995.The average convective heat transfer coefficient of the water layer radiant wall panels is 2.94 W/(m2·℃),the radiant heat transfer coefficient is 5.14 W/(m2·℃),and the total heat transfer coefficient is 7.33 W/(m2·℃).The average internal thermal resist-ance of air layer radiant panels is 0.069 2 m2·℃/W,while for water layer radiant cool-ing panels,it is only 0.020 3 m2·℃/W,indicating a lower internal thermal resistance for the water layer radiant cooling wall panels.