基于遗传算法的双组分体系汽液相平衡计算  

Calculation of Vapor-liquid Phase Equilibrium of Two-component System by Genetic Algorithm

作　　者：陈惜明[1] 唐伟珊 瞿周 任静茹 何正端 CHEN Ximing;TANG Weishan;QU Zhou;REN Jingru;HE Zhengduan(School of Chemistry and Materials Science,Huaibei Normal University,235000,Huaibei,Anhui,China)

机构地区：[1]淮北师范大学化学与材料科学学院

出　　处：《淮北师范大学学报（自然科学版）》2019年第3期38-43,共6页Journal of Huaibei Normal University：Natural Sciences

基　　金：大学生创新创业项目(201710373045,201810373002)

摘　　要：混合物汽液相平衡计算是热力学性质计算的一项重要内容.等压泡点计算是已知混合体系压力和液相组成,求泡点温度和汽相组成,这类计算通常采用迭代法,但迭代法计算速度慢,且事先需要构造满足收敛性要求的迭代方程.遗传算法是求解最优化问题的一种搜索启发式算法.文章以甲醇-水体系为例,探讨遗传算法应用于等温泡点计算的程序实现,并与主流计算软件AspenPlus计算结果进行对比.计算结果表明,遗传算法用于相平衡计算时收敛速度快,算法稳定,结果可靠.Calculate mixture vapor liguid equilibrium(VLE)is an important thermodynamic properties calcula?tion.Iterative method is often used to calculate the bubble point temperature and the mole fractions of vapor when the pressure and mole fractions of liquid are known in the case of VLE.However,the iterative calcula?tion is slow and the iterative equation should be convergent.Genetic algorithm is a search heuristic algorithm for optimization problems.Genetic algorithm had been applied to calculate the isothermal bubble-point.The results calculated by genetic algorithm and Aspen had been compared.The calculated results show that the genetic algorithm is stable and converged rapidly when it was applied to calculate the phase equilibrium.It is superior to the iterative method.

关 键 词：等压泡点 遗传算法 迭代算法 WILSON方程 

分 类 号：TQ[化学工程]