Research progress on phase change heat of gas hydrates

doi:10.16085/j.issn.1000-6613.2016.07.013

Abstract

Abstract: Gas hydrates can be employed as a special phase-change material, as they have variable phase change heat changes during their formation or dissociation. This article summarizes the researches of phase change heat of gas hydrates from their measurements and applications. The direct and indirect methods of determining the phase change heat of gas hydrates are compared and analyzed in this work. The direct method is accomplished by using differential scanning calorimetry (DSC) while the indirect calculation method is achieved by Clausius-Clapeyron equation on basis of hydrate phase equilibrium data. The applications of phase change heat of gas hydrates are summarized comprehensively. Especially, the gas hydrates as the cold storage media in air condition systems are introduced in detail. The cold storage based on gas hydrates are discussed from cold storage media and cold storage devices. The key points and difficulties on the applications of phase change heat of gas hydrates are also pointed out. This paper is prone to provide a guide for the further utilization of phase change heat of gas hydrates.

Key words: hydrate, phase change heat, measurement, cold storage, optimization

摘要： 气体水合物作为一种特殊的相变材料,在形成与分解过程中会发生相态改变并伴随着相变热的变化。本文从气体水合物相变热的测定和应用两个方面对气体水合物相变热的研究现状进行了综述。对比分析了两种确定气体水合物相变热的方法,两种方法分别为差示扫描量热仪(DSC)实验直接测定法和基于相平衡的Clausius-Clapeyron方程间接计算法。综述了气体水合物相变热的应用研究现状,尤其是在空调蓄冷技术中的应用,其中气体水合物空调蓄冷技术从蓄冷工质和蓄冷装置两个方面进行了阐述。指出了气体水合物相变热应用研究中的重点和难点,为气体水合物相变热应用的进一步发展提供参考。

关键词: 水合物, 相变热, 测量, 蓄冷, 优化

CLC Number:

TQ026

HU Yafei, CAI Jing, XU Chungang, LI Xiaosen. Research progress on phase change heat of gas hydrates [J]. Chemical Industry and Engineering Progree, 2016, 35(07): 2021-2032.

胡亚飞, 蔡晶, 徐纯刚, 李小森. 气体水合物相变热研究进展[J]. 化工进展, 2016, 35(07): 2021-2032.

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