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目的制备一种适用于建筑内墙使用的、相变温度(室温)为一个区间段的复合相变材料,有效地提高能源利用率,达到节能减排的目的.方法对3种饱和脂肪酸以不同配比(质量比)进行复配,测试其升、降温曲线,优选适宜的复合相变材料,并采用理论计算分析与实验测试相结合的方法,估算研制出复合相变材料的相变潜热.结果复配所制复合相变材料,其相变温度介于19～26℃,相变潜热约为150 kJ/kg.在抹面砂浆只需加入5.76 kg所制复合相变材料,就可使14.85 m2房间的室内空气温度改变1℃.结论研制的复合相变材料具有适宜的温度范围,较大的相变潜热,有望应用于建筑抹面砂浆中.
Objective To prepare a composite phase change material which is suitable for the interior wall of a building and whose phase transition temperature (room temperature) is an interval section, effectively improve the energy utilization rate and achieve the purpose of energy conservation and emission reduction.Methods Three kinds of saturated fatty acids (Ratio by mass) to test the ascending and descending temperature curves of the composite phase change materials, and the suitable composite phase change materials are selected. The theoretical phase transformation calculation and experimental tests are combined to estimate the latent heat of phase transformation of the composite phase change materials. As a result, the phase transition temperature of composite phase change material was between 19 ℃ and 26 ℃, and the latent heat of phase transition was about 150 kJ / kg.After adding 5.76 kg of composite phase change material into plastering mortar, 14.85 m2 The indoor air temperature in the room changed by 1 ° C. Conclusion The composite phase change material developed has suitable temperature range and large latent heat of phase transformation and is expected to be applied to the mortar of architectural plastering.