在不同气候条件下提高多层建筑围护结构能源效率的 相变材料(水泥-石灰砂浆)
摘要
估了使用五种不同成分的相变材料水泥-石灰砂浆的多层建筑围墙的热能行为。在 15℃ -82%RH(冷却)和 30℃ -
33%RH(加热)的气候条件下,作者研究了含有 20%的微胶囊相变材料和其他添加物(如纤维素纤维和珍珠岩,一
种轻质骨料(LWA))的水泥-石灰砂浆的行为,这些条件是通过气候室应用的。在实验室测试中,多层围墙两侧的
温度和热通量是通过实验测量的。相变材料水泥-石灰砂浆层两侧的温度也进行了测量。据观察,加入相变材料水
泥-石灰砂浆层后,通过围墙的热通量有所延迟。在一个加热周期内,相变材料的加入使热浪前沿的到来延迟了 30
分钟(与没有相变材料的参考砂浆相比,延迟了 8.1%)。在加入相变材料后的冷却循环中,与参考混合物相比,热波
前沿的到来延迟了 40.6%(延迟了 130分钟)。此外,在相变材料水泥-石灰砂浆中加入 LWA还改善了热绝缘性,进
一步提高了建筑围护结构的能源效率,不仅可用于新建建筑,还可用于现有建筑围护结构的能源修复。
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DOI: http://dx.doi.org/10.12361/2661-3654-04-02-86609
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