相变材料蓄能式吊顶辐射供冷系统热性能模拟研究  

Simulation Research on Thermal Performance of Radiant Cooling Ceiling with Phase Change Material for Thermal Storage

作　　者：张群力[1] 狄洪发[2] 

机构地区：[1]北京建筑工程学院北京市供热供燃气通风与空调重点实验室,北京100044 [2]清华大学建筑学院建筑技术科学系,北京100084

出　　处：《建筑科学》2012年第10期88-92,共5页Building Science

基　　金：国家自然科学基金青年基金资助项目(00351911032)

摘　　要：本文将单位体积蓄能密度较大的相变材料与毛细管网格栅埋入到建筑吊顶中,设计出了一种相变材料蓄能式吊顶辐射供冷末端形式,建立了分析该吊顶在间歇运行工况下热性能的数学模型,利用该模型可以分析不同相变材料物性对该相变材料蓄能式吊顶的表面平均热流密度和蓄能比的影响。通过对影响因素的敏感性分析,得出了影响吊顶热性能的主要因素。此外,对比分析了相变材料蓄能式吊顶与混凝土蓄能式吊顶热性能的差异,指出相变材料蓄能式吊顶辐射供冷方式具有蓄能比更高的特点。In this paper, a radiant cooling ceiling for thermal storage was presented, in which the capillary grid with phase change material was buried. Firstly, the mathematical model for the thermal performance of such ceiling under interval cooling conditions was set up. Secondly, the influences of various thermal property factors of phase change material on the average heat flux and energy storage ratio were analyzed, and the main influence factors were determined based on the sensitivity analysis. Thirdly, the thermal performance differences between the phase change material ceiling and the concrete ceiling were analyzed. The results indicated that the energy storage ratio of the former one was lager than that of the latter one.

关 键 词：相变材料 供冷吊顶 蓄能 

分 类 号：TU831.6[建筑科学—供热、供燃气、通风及空调工程]