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Thermal performance analysis of PCM wallboards for building application based on numerical simulation

机译:基于数值模拟的建筑用PCM墙板热性能分析

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摘要

The use of phase change materials (PCMs) in buildings is an efficient way to reduce the building energy consumption. PCM wallboards used in buildings have been widely studied and optimized in many studies; however, further thermal performance analysis needs to be performed. To utilize the PCM more efficiently in practical engineering, five PCM wallboards used in the exterior wall of an air-conditioning room in Beijing were studied using numerical simulation, and four new aspects of the thermal performance analysis of PCM wallboards were presented. It was found that the energy consumption of the building using the PCM wallboard with a higher phase change range was 103 kJ less than the referenced wallboard in June, while 72 kJ more in December. Therefore, the thermal performance of the PCM wallboard might be adverse in different seasons, and the thermal performance analysis during an entire year was necessary. Using the heat ratio, the months in which the phase change had a significant effect on the thermal performance of the wall were found, and only in these months, the optimization of the thermal performance was effective. The heat transfer coefficient of the PCM wall was defined, and it was used to justify that the PCM met the design standard for energy efficiency of buildings. Using relative thermal conductivity, the effective months of the phase change for different areas of China were determined. The optimization of the thermal performance of the PCM wallboard should focus on these months. For Beijing, the months were June and September. For Harbin, the months were July and August. For Shanghai, the months were June, July, and September. For Guangzhou and Haikou, the months were May and April, respectively.
机译:在建筑物中使用相变材料(PCM)是减少建筑物能耗的有效方法。建筑物中使用的PCM墙板已被广泛研究并在许多研究中得到了优化。但是,需要进行进一步的热性能分析。为了在实际工程中更有效地利用PCM,通过数值模拟研究了北京空调房间外墙使用的五种PCM墙板,并提出了PCM墙板热性能分析的四个新方面。结果发现,使用相变范围更大的PCM墙板的建筑物的能耗比6月的参考墙板低103 kJ,而12月则高出72 kJ。因此,PCM墙板的热性能在不同季节可能会不利,因此有必要对全年进行热性能分析。使用热量比,发现相变对壁的热性能有显着影响的月份,仅在这些月份中,热性能的优化才有效。定义了PCM墙的传热系数,并用来证明PCM符合建筑节能设计标准。利用相对热导率,确定了中国不同地区相变的有效月份。 PCM墙板的热性能优化应该集中在这几个月。对于北京来说,几个月是六月和九月。哈尔滨的月份是七月和八月。对于上海来说,月份是六月,七月和九月。广州和海口的月份分别是五月和四月。

著录项

  • 来源
    《Solar Energy》 |2018年第3期|533-540|共8页
  • 作者单位

    Beijing Univ Technol, Key Lab Green Built Environm & Energy Efficient T, Beijing 100124, Peoples R China;

    Beijing Univ Technol, Key Lab Green Built Environm & Energy Efficient T, Beijing 100124, Peoples R China;

    Beijing Univ Technol, Key Lab Green Built Environm & Energy Efficient T, Beijing 100124, Peoples R China;

    Beijing Univ Technol, Key Lab Green Built Environm & Energy Efficient T, Beijing 100124, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Phase change material; Thermal performance; Heat ratio; Relative thermal conductivity;

    机译:相变材料;热性能;热比;相对导热率;
  • 入库时间 2022-08-18 00:22:52

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