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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, phase change material and capillary grid with large energy density per unit volume were buried in the ceiling of the building, a kind of phase-change material storage-type ceiling radiation cooling terminal was designed, The mathematical model of thermal performance under operating conditions can be used to analyze the effect of different phase change material properties on the average surface heat flux and energy storage ratio of the PCM ceiling. Through the analysis of the sensitivity of the influencing factors, the main factors that affect the thermal performance of the suspended ceiling are obtained. In addition, the difference of thermal performance between phase-change material storage ceiling and concrete storage-type ceiling is analyzed and compared. It is pointed out that the phase-change material storage ceiling has the characteristics of higher energy storage ratio.