- 目录
- 保温材料与建筑节能
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基于保温隔热建筑墙体的相变混凝土热物理性能研究
作者：李成延1，廖玥琪1，方从启1，2
（1.上海师范大学 建筑工程学院，上海 201418；
2.上海交通大学 船舶海洋与建筑工程学院，上海 200240）
2.上海交通大学 船舶海洋与建筑工程学院，上海 200240）
摘要：以双层相变混凝土墙体为模型，通过测量比热容和导热系数以及升温曲线，研究相变混凝土墙体热物理性能，并结合COMSOL数值模拟的方法验证其节能潜力。结果表明，相变材料的掺入能降低混凝土的导热系数，并在相变温度区间大幅提高其比热容；高温火灾情况下，相变混凝土墙体升温速率远低于普通墙体；其对室内温度的自主调节能力也有大幅提升，在夏季可使室内最高温度降低2.7 ℃，日均节能率23.6%；冬季可使室内最低温度升高2.6 ℃，日均节能率36.6%；并推迟最高或最低温度的到来时间。
关键词：相变混凝土；建筑墙体；热物理性能；隔热保温；升温曲线
中图分类号：TU55+1 文献标识码：A 文章编号：1001-702X（2023）01-0084-06
Research on thermal physical properties of phase change concrete based on thermal insulation building walls
LI Chengyan1，LIAO Yueqi1，FANG Congqi1，2
（1.School of Construction Engineering，Shanghai Normal University，Shanghai 201418，China；
2.School of Naval Architecture，Ocean and Civil Engineering，Shanghai Jiao Tong University，Shanghai 200240，China）
Abstract：A double-layer phase change concrete wall was taken as a model. The thermal physical properties of phase change concrete wall were studied by measuring specific heat capacity，thermal conductivity and temperature rise curve，and its energy saving potential was verified by COMSOL numerical simulation. The results show that the incorporation of PCM can reduce the thermal conductivity of concrete and greatly increase its specific heat capacity at the phase change temperature range. In the case of high temperature fire，the heating rate of PCM wall is much lower than that of concrete wall. Its self-regulation ability to indoor ambient temperature is also greatly improved. In summer，the maximum indoor temperature can be reduced by 2.7 ℃，and the average daily energy saving rate is 23.6%. In winter，the minimum indoor temperature can be raised by 2.6 ℃，and the average daily energy saving rate is 36.6%. The arrival time of the maximum and minimum temperature can be delayed.
Key words：phase change concrete，building walls，thermal physical properties，thermal insulation，heating curves