OPTIMUM DESIGN MODEL OF COMPLEX COUNTERCURRENT MULTI-EFFECT EVAPORATION AND ITS ALGORITHM

RUAN Qi; YE Changshen; CHEN Wenbo; HUANG Shihuang

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OPTIMUM DESIGN MODEL OF COMPLEX COUNTERCURRENT MULTI-EFFECT EVAPORATION AND ITS ALGORITHM

更新时间：2025-12-10

- OPTIMUM DESIGN MODEL OF COMPLEX COUNTERCURRENT MULTI-EFFECT EVAPORATION AND ITS ALGORITHM
- CIESC Journal Issue 8, (2001)
- 作者机构：
  
  福州大学化学工程系
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 August 2001，
  
  Published：25 August 2001
- 稿件说明：
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RUAN Qi, YE Changshen, CHEN Wenbo, et al. OPTIMUM DESIGN MODEL OF COMPLEX COUNTERCURRENT MULTI-EFFECT EVAPORATION AND ITS ALGORITHM[J]. CIESC Journal, 2001, (8).
DOI：

RUAN Qi, YE Changshen, CHEN Wenbo, et al. OPTIMUM DESIGN MODEL OF COMPLEX COUNTERCURRENT MULTI-EFFECT EVAPORATION AND ITS ALGORITHM[J]. CIESC Journal, 2001, (8). DOI：

摘要

建立了带有冷凝水闪蒸的复杂逆流多效蒸发系统优化设计的数学模型

该模型以整个蒸发系统的年总费用 (包括加热蒸汽年费用、真空泵年动力费用以及蒸发器和辅助设备的年折旧维修费用等 )最小为优化目标

以生蒸汽压力、冷凝器真空度及各效有效传热温度差为决策变量

提出一种新算法———复合形法结合Lagrangian乘子法、迭代法和矩阵法求解模型 .算例表明

生蒸汽压力、冷凝器真空度和冷凝水闪蒸对优化设计结果影响显著

优化设计比常规设计可节省年费用 11%左右 .新算法收敛稳定性好

收敛速度快

Abstract

The mathematical model of complex countercurrent multi-effect evaporation with condensed water flash is established

which aims at minimum annual cost (including cost of fresh vapor

vacuum pump power

evaporator

maintenance and depreciation).Based on such decisive variables as the pressure of fresh vapor

the pressure of condenser and heat-transfer mean temperature difference of vari-effect

the model is solved by the complex method

Lagrangian multiplier method

iteration method and matrix method.The practical example indicates that the influence of the pressure of fresh vapor

the pressure of condenser and flash of condensed water on the optimum design results is notable.The annual cost calculated by the optimum method is decreased by about 11% against that calculated by the conventional method.The new algorithm increases the convergence speed and stability.

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