硬脂酸正丁酯和石蜡复合相变储热材料的热性能测试

Experimental Studies on Compound Phase Change Material Composed of Butyl Stearate and Paraffin Used as Heat Storage in Greenhouses

根据材料的相变温度、相变潜热和价格,选择硬脂酸正丁酯和石蜡2种相变材料,按照不同的质量配合比7∶3、6∶4、5∶5、4∶6、3∶7混合制备成复合相变材料试样。采用差式扫描量热仪测试制备的试样及纯石蜡和硬脂酸正丁酯在升温和降温过程中,热流密度随温度升降的变化规律。研制可用于温室生产的硬脂酸正丁酯和石蜡复合相变材料。结果表明:新制备的复合材料的热性能优于单纯的石蜡和硬脂酸正丁酯,并且通过分析比较,得出质量配合比为5∶5的复合材料为最优。

The purpose was to find new compound phase change material which is suitable to heat storage in greenhouse,according to transition temperature,heat of fusion and price,we choosed butyl stearate and paraffin to mix into new compound phase change material.The mass propotion was 7∶3,6∶4,5∶5,4∶6,3∶7.Testing the heat flow chart with varying temperature of new compound phase change material and paraffin and butyl stearate samples using differential Scanning Calorimeter.Analyzing DSC chart it turned out that the thermal properties of new Compund PCMs were better than paraffin or butyl stearate. The mass proportion of 5 ： 5 of butyl stearate and paraffin was the best.