脂肪酸类相变材料传热及液相渗漏的研究进展

Review on heat transfer and liquid phase leakage of fatty acids phase change materials

能源的大量消耗使得储热技术研究越来越重要,相变材料作为一种有效的潜热储热材料在潜热储热系统中占据重要地位。脂肪酸相变材料因其来源广泛,具有共熔和共结晶特点、相变焓高和清洁可再生等优点受到广泛关注,但脂肪酸相变材料也存在热导率低和固-液相转变时液相渗漏等缺点。本文对国内外脂肪酸相变材料的传热和渗漏进行了综述与讨论,就热导率低的缺点提出了强化传热的方式,通过建立传热模型研究其导热行为并预测传热系数;就渗漏问题提出4种有效解决液相渗漏的方法,分析了各种方法的优缺点。对节能环保要求越来越高的今天,解决脂肪酸相变材料的传热和渗漏已成为热点问题。最后对脂肪酸相变材料的发展前景进行展望。

With increasing energy consumption,energy storage techniques are becoming more and more important. The phase change materials （PCM）,which are efficient latent heat thermal storage materials,play an important role in the latent heat thermal storage system. Fatty acids PCM because of its rich resources,characteristics of eutectic and cocrystallization,large latent heat,cleanness and renewableness have attracted extensive attention. However , poor heat conductivity , leakage in solid-liquid phase change are the disadvantages. In this paper,fatty acids PCM heat transfer and leakage are reviewed and heat transfer enhancement to resolve the shortcoming of low thermal conductivity is discussed. A thermal heat transfer model is established and the behavior of heat transfer is predicted,and coefficient on leakage issues raised. Four solutions of liquid leakage are proposed and their advantages and disadvantages are analyzed. The prospects of fatty acids PCM are presented.