气体水合物蓄冷过程的特性研究

Performance Study on Alternative Gas Hydrate Cold Storage

本文以统计热力学为理论依据，对水合物蓄冷过程进行理论分析，指出由于Ｌａｎｇｍｕｉｒ常数很难计算使得水合物生成条件－分解温度，分解压力的直接推导非常麻烦，为此发展一种计算水合物生成条件的简便方法，得到分解温度和分解压力的理论关系式。在理论分析的基础上，以Ｒ１５２ａ和Ｒ１５２ａ／Ｒ１３４ａ水合物为蓄冷介质，进行实验研究，确定它们的生成条件。此外，通过测量水合物的冷却率，采用非稳态方法计算出Ｒ１５２ａ水合物的物性参数，为蓄冷系统的理论分析和设计提供参考依据。

First of all,theoretical analysis on gas hydrate is studied using statistical thermodynamics theory,a simple analytical calculation method is founded to obtain the relationship of decomposition pressure and temperature.Then R152a gas hydrate and R152a/R134a gas hydrate are studied experimentally as refrigeration alternatives to decide their decomposition temperature and pressure as well as the properties of R152a gas hydrate.The two effective factors are discussed finally.