计算焦耳-汤姆逊系数的LKP方法

LKP Method for Calculating Jourle-Thomson Coefficient

本文使用LKP三参数对应态状态方程,导出了用D_z=D_z～(0)+_ωD_z～(1),即用偏压缩因数导数Z_T,与压缩因数Z之差D_z表达的焦耳-汤姆逊系数计算公式;并在P_r=0.1～10、T_r=0.3～4范围内,计算出D_z～(0)和D_z～(1)数据表。为焦耳-汤姆逊系数的测算,提供了一种较为简便准确的算法。对非烃气体——氧气和氮气,烃类气体——丙烷,以及天然气的焦耳-汤姆逊系数测算表明:所得结果与实验数据、文献资料吻合,误差在工程允许范围内。

Using three parameters LKP corresponding state equation of state, this paper derives the Jourle- Thomson coefficient calculation formula expressed by Dz=Dz^((0))+ωDz^((1)), i. e. the difference(Dz)be- tween bias compression factor derivative Z_r and compression factor Z, and calculates the data table of Dz^((0)) and Dz^((1)) at Pr=0. 1~10 and T_r=0. 3~4. It proposes a simple, convenient and accurate calcu- lation method for calculating Jourle-Thomson coefficient. Through calculating the Jourle-Thomson cof- ficients for non-hydrocarbon gases-oxygen and nitrogen, hydrocarbon gases-propane as well as natural gas, it is indicated that the results obtained are identical with the data of expcriment and literature in formation, the error is in the limit permitted for engineering.