多元复合相变墙体材料的性能研究
发布时间：2019-04-03 18:18
【摘要】：随着城市化进程不断的推进,当今全球能源危机已日益突出,我国能源供求关系尤为紧张,而且建筑能耗更是占全国总能耗的25%以上,同时目前已建建筑物中高能耗建筑占总建筑物数量的95%以上。因此节能减排、低碳经济,保护环境,已经成为当今世界发展的主旋律,而社会对建筑的节能环保方面提出更高的要求,节能建筑材料的开发受到广泛的关注。相变储能材料是通过其物相之间不断转换,而吸收或释放热量来达到控温效果。将相变材料掺入传统的水泥砂浆混凝土中制备新型高效节能建筑墙体材料,对经济效益和环境效益会有显著的提高,因此具有很高的研究价值。本文选用优质多孔载体材料膨胀珍珠岩(EP)与相变储能材料月桂酸(LA)、石蜡通过简单的物理熔化法进行熔融复合,制备出2种定型复合相变储能材料(SSPCM),为PCM与保温材料及墙体材料的相容性问题的解决提供了新的方法。对制备好的两种定型复合相变储能材料做一系列试验对其性能进行研究,掌握相变型保温墙体材料的控温性能的演化规律,阐明相变型保温墙体材料组成、结构对其性能的影响机制,为相变材料在建筑节能中的应用提供新的途径和方法。通过容留量试验确定相变材料的最佳浸渍时间设置是1h,最适宜的浸渍温度是70℃。从吸水率试验可知两种相变储能材料在与膨胀珍珠岩复合的过程中,会对膨胀珍珠岩的吸水率产生正面影响,能有效的降低基体材料的吸水率,月桂酸-膨胀珍珠岩复合相变材料的降低基体材料的吸水率能力低于石蜡-膨胀珍珠岩复合相变材料。从耐久性测试结果表明两种复合相变储能材料性能都比较稳定,而石蜡-膨胀珍珠岩复合相变储能材料比月桂酸-膨胀珍珠岩复合相变储能材料耐久性好,从步冷曲线中看出二者基本无过冷现象。同时通过DSC曲线测试了两种复合相变墙体材料的相变温度与相变潜热,建议其应用于实践的范围。将两种定型复合相变储能材料添加进墙体,进行性能测试。通过体积膨胀率试验可知随着相变材料含量的增加,两种墙体的体积膨胀率都逐渐增大。控温能力测试结果表明随着定型复合相变储能材料的添加量的逐步增多,调温能力随之提高,且月桂酸复合相变储能材料的相变潜热大于石蜡复合相变储能材料。结合力学试验可知相变储能墙体材料的水泥试件随复合相变的掺量的增加而强度减小,因此在墙体材料中应该添加合适的月桂酸-膨胀珍珠岩复合相变储能材料与石蜡-膨胀珍珠岩复合相变储能材料。
[Abstract]:With the continuous progress of urbanization, the global energy crisis has become increasingly prominent, the relationship between energy supply and demand in China is especially tense, and the energy consumption of buildings accounts for more than 25% of the total energy consumption in the country. At the same time, high energy consumption buildings account for more than 95% of the total number of buildings. Therefore, energy saving and emission reduction, low carbon economy and environmental protection have become the main theme of the development of the world today, and the society put forward higher requirements for building energy saving and environmental protection, and the development of energy saving building materials has received extensive attention. The temperature control effect of phase change energy storage materials is achieved by the continuous transformation between phases and the absorption or release of heat. The preparation of new type of energy-saving building wall materials by blending phase change materials into the traditional cement mortar concrete will significantly improve the economic and environmental benefits, so it has a high research value. In this paper, the high-quality porous carrier material, expanded perlite (EP), and the phase change energy storage material, (LA), paraffin, were used to melt and composite by a simple physical melting method, and two kinds of shaped composite phase change energy storage materials (SSPCM), were prepared. It provides a new method to solve the compatibility problem between PCM and insulation materials and wall materials. A series of tests were carried out to study the properties of two kinds of shaped composite phase change energy storage materials. The evolution rule of temperature control performance of phase change insulation wall materials was grasped, and the composition of phase change heat preservation wall materials was clarified. The influence mechanism of structure on its performance provides a new way and method for the application of phase change materials in building energy saving. The optimum impregnation time is 1 h and the optimum impregnation temperature is 70 鈩，
本文编号：2453436
[Abstract]:With the continuous progress of urbanization, the global energy crisis has become increasingly prominent, the relationship between energy supply and demand in China is especially tense, and the energy consumption of buildings accounts for more than 25% of the total energy consumption in the country. At the same time, high energy consumption buildings account for more than 95% of the total number of buildings. Therefore, energy saving and emission reduction, low carbon economy and environmental protection have become the main theme of the development of the world today, and the society put forward higher requirements for building energy saving and environmental protection, and the development of energy saving building materials has received extensive attention. The temperature control effect of phase change energy storage materials is achieved by the continuous transformation between phases and the absorption or release of heat. The preparation of new type of energy-saving building wall materials by blending phase change materials into the traditional cement mortar concrete will significantly improve the economic and environmental benefits, so it has a high research value. In this paper, the high-quality porous carrier material, expanded perlite (EP), and the phase change energy storage material, (LA), paraffin, were used to melt and composite by a simple physical melting method, and two kinds of shaped composite phase change energy storage materials (SSPCM), were prepared. It provides a new method to solve the compatibility problem between PCM and insulation materials and wall materials. A series of tests were carried out to study the properties of two kinds of shaped composite phase change energy storage materials. The evolution rule of temperature control performance of phase change insulation wall materials was grasped, and the composition of phase change heat preservation wall materials was clarified. The influence mechanism of structure on its performance provides a new way and method for the application of phase change materials in building energy saving. The optimum impregnation time is 1 h and the optimum impregnation temperature is 70 鈩，
本文编号：2453436
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