Energy deficiency and environmental pollution are always the most significant issues that researchers confront. One of the solutions for economising on energy consumption in structures is to use phase change materials (PCMs) in elements such as wallboards, roofs and floors. PCMs have good thermal characteristics such as high fusion heat, large latent heat capacity, solid–liquid phase change and they are also eco-friendly. In this research, PEG600 was used as a PCM in gypsum sandwich-panels with thicknesses of 7 and 10 cm and a PCM ratio of 10 and 15%wt. Gypsum/PEG600 sandwich-panels were constructed in three types – standard, hollow-core and macro-encapsulated. They were tested using apparatus under the thermal conditions of two different cities, to measure the maximum reduction of the specimens’ inner side temperature, the time delay to reach the maximum daily temperature and the amount of reduction in temperature, comparing different ratios of integrating PEG600 into gypsum panels. Macro-encapsulated sandwich-panels performed better. These reduced the maximum daily temperature by up to 5.7°C; this amount was 5.6°C and 3.4°C for standard and hollow-core specimens, respectively. The compressive and flexural strengths of gypsum/PEG600 panels reduced with an increasing PEG600 ratio.

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相变材料石膏夹芯板的热力学性能

能源缺乏和环境污染一直是研究人员面临的最重要的问题。节约结构能源消耗的解决方案之一是在墙板、屋顶和地板等元素中使用相变材料 (PCM)。相变材料具有良好的热特性，如高聚变热、大潜热容量、固液相变和环保。在这项研究中，PEG600 被用作厚度为 7 和 10 cm 的石膏夹芯板中的 PCM，PCM 比例为 10 和 15%wt。石膏/PEG600 夹层板分为三种类型——标准型、空心型和宏观封装型。他们在两个不同城市的热条件下使用仪器进行了测试，以测量试样内侧温度的最大降低，达到日最高温度的时间延迟和降温量，比较了不同比例的PEG600融入石膏板。宏观封装的夹层板表现更好。这些措施将每日最高温度降低了 5.7°C；对于标准样品和空心样品，该量分别为 5.6°C 和 3.4°C。石膏/PEG600 面板的抗压和抗弯强度随着 PEG600 比例的增加而降低。