纯烃物质的过热与过减压极限

Limits of superheat and super depressurization of pure hydrocarbons

比较了状态方程法、分子聚集理论、动力学理论和涨落理论等几种计算物质过热度的方法 ,计算了纯烃物质在常压和加压条件下的过热与过减压极限。结果表明 ,RK状态方程对多数纯烃物质具有较好的准确度 ,而涨落方法对于轻烃准确度较高。以甲烷和丙烷为例给出了过热极限和过减压极限的典型计算结果 ,分析了可能使液体达到过减压极限的储存条件。

Several methods for calculating limits of superheat,such as the state equation method,the molecular aggregation,the kinetic theory and the fluctuation theory,are introduced and evaluatedLimits of superheat and super depressurization of pure hydrocarbons are calculatedIt turns out that the RK equation is sufficiently accurate for most of these pure hydrocarbons,while the fluctuation theory is very good for light hydrocarbonsTypical results of the limits of superheat and super-depressurization for methane and propane are given,and the critical liquid storage conditions that can lead to limits of super depressurization are analysed