Numerical and experimental research of cold storage for a novel expanded perlite-based shape-stabilized phase change material wallboard used in building
Numerical and experimental research of cold storage for a novel expanded perlite-based shape-stabilized phase change material wallboard used in building
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新型膨胀珍珠岩基稳形相变材料建筑墙板冷库数值与实验研究
DOI：
10.1016/j.enconman.2017.10.052
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发表时间：
2018-01-01
影响因子：
10.4
通讯作者：
Qia, Chengying
中科院分区：
文献类型：
--
作者：
Yao, Chengqiang;Kong, Xiangfei;Qia, Chengying
相变材料应用于建筑中可以增强建筑物的热惯性，改善室内热舒适性。以石蜡为相变材料，膨胀石蜡（EP）为支撑材料，采用卧式真空吸附旋转辊（HVARR）制备了一种新型的定形相变储能材料（PCMW）。测得其熔点和凝固点分别为27.60 ℃和23.56 ℃，熔化潜热和凝固潜热分别为67.13 J/g和67.06 J/g。对PCMW进行了实验和数值模拟研究，分析了其热性能。在我国北方典型气候条件下的集装箱内进行了为期5天的实验，结果表明，在建筑物中使用PCMW可以使室内温度最大降低2.53K。在数值研究中，基于等效热容法，建立了PCMW的一维传热模型，并与TRNN相结合。通过实验数据对模型进行了验证，数值计算结果与实验数据吻合较好。在夏季工况下，对一典型办公楼两个月内使用PCMW的数值研究表明，PCMW在办公楼运行时间内（7：00-18：00）平均可降低建筑物温度9.22K。此外，根据数值模型，还得到了我国寒冷地区PCMW机组的最优配置。该方法为PCMW的设计和应用提供了全面的指导。
Phase change material (PCM) used in building can enhance the thermal inertia of building and improve the indoor thermal comfort. A novel shape-stabilized phase change material wallboard (PCMW), in which paraffin was as the PCM and expanded perlite (EP) was the supporting material, has been prepared through a horizontal vacuum absorption rotate roller (HVARR) in this study. Its melting point and freezing point were measured to be 27.60 degrees C and 23.56 degrees C, respectively, and the melting and freezing latent heats reached to be 67.13 J/g and 67.06 J/g, respectively. PCMW was experimentally and numerically studied to analyze the thermal performance. The experimental result in 5 days, which was a demonstration in a container subject to weather conditions typical for the north China, showed that PCMW used in the building can maximally reduce the indoor temperature of 2.53 K. Eor the numerical study, based on the equivalent heat capacity method, a one-dimensional heat transfer model of PCMW was developed and combined with TRNSYS. This model was validated by the experimental data, and the numerical data agreed well with the experiment data. Under the summer condition, the numerical study of PCMW used in a typical office building during two months showed PCMW can averagely reduce the temperature of 9.22 K in the building operation time (7:00-18:00). Besides, according to the numerical model, an optimal configuration of PCMW in the cold zone of China has been obtained. The studied method provides a comprehensive guide to the PCMW design and application.