Calculation of y from T, p and x Data in Vapor-Liquid Equilibrium Using Spline Function Method (Ⅱ) Ternary System

刘洪来; 英徐根; 胡英

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Calculation of y from T, p and x Data in Vapor-Liquid Equilibrium Using Spline Function Method (Ⅱ) Ternary System

更新时间：2025-12-16

- Calculation of y from T, p and x Data in Vapor-Liquid Equilibrium Using Spline Function Method (Ⅱ) Ternary System
- CIESC Journal Issue 4, (1991)
- 作者机构：
  
  华东化工学院热力学研究室,华东化工学院热力学研究室,华东化工学院热力学研究室 ,上海,上海,上海
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 August 1991，
  
  Published：25 August 1991
- 稿件说明：
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刘洪来, 英徐根, 胡英. Calculation of y from T, p and x Data in Vapor-Liquid Equilibrium Using Spline Function Method (Ⅱ) Ternary System[J]. CIESC Journal, 1991, (4).
DOI：

刘洪来, 英徐根, 胡英. Calculation of y from T, p and x Data in Vapor-Liquid Equilibrium Using Spline Function Method (Ⅱ) Ternary System[J]. CIESC Journal, 1991, (4). DOI：

摘要

采用模拟平板弯曲变形的曲面样条函数表达三元系过量自由焓函数Q

由此建立了一个在汽液平衡中由T、p、x数据推算y的间接算法.非线性方程组的求解采用Broyden改进的Newton—Raphson迭代程序

经过30个从接近理想到高度非理想的不同类型三元系的检验结果表明

本方法计算结果可靠

与实验值符合良好.本方法还具有算法稳定、对初值要求不高及收敛速度快、过量性质影响小等特点.

Abstract

By using a spline function for curved surface used in simulating the bending of a plate to describe the ternary excess free enthalpy function Q

a new indirect method for calculating ternary vapor composition y from T

p and liquid composition x was established. Broyden-Nowton-Raphson iteration procedure was used for solving the nonlinear equations. The calculation of 30 ternary systems from nearly ideal to highly nonideal phase behavior showed that this new method was very stable and reliable. The calculated results were in good agreement with the experimental data. More-over

this method had a variety of distinguishing features such as good convergence

no special requirement for initial values and little influence caused by neglecting the excess properties during calculation.

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