The Thermodynamic Efficiency of MSF Process and the Conditions of Desalination by Waste Heat

王世昌

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The Thermodynamic Efficiency of MSF Process and the Conditions of Desalination by Waste Heat

更新时间：2025-12-16

- The Thermodynamic Efficiency of MSF Process and the Conditions of Desalination by Waste Heat
- CIESC Journal Issue 1, (1983)
- 作者机构：
  
  天津大学
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 March 1983，
  
  Published：25 March 1983
- 稿件说明：
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王世昌. The Thermodynamic Efficiency of MSF Process and the Conditions of Desalination by Waste Heat[J]. CIESC Journal, 1983, (1).
DOI：

王世昌. The Thermodynamic Efficiency of MSF Process and the Conditions of Desalination by Waste Heat[J]. CIESC Journal, 1983, (1). DOI：

摘要

本文从分析多级闪蒸过程的不可逆性出发

建立了加热过程和盐水循环多级闪蒸过程的可用能损失关系;讨论了余热利用的条件;并提出反映多级闪蒸系统热力学效率的不可逆温差函数.提供了评价该类装置热力学效率以及过程改进方向的方法.利用上述原理对一台5级海水淡化实验装置和大型生产设备的能源利用进行评价

结果表明:本文的方法可用于按节能原则选择闪蒸级数、传热端差和相对流量等过程参数.

Abstract

The exergy losses and thermodynamic efficiency of MSF plant with brine recirculation are discussed by means of temperature difference functions proposed by the author. In a MSF plant

the irreversible losses are found mainly in irreversible heat-transfer and flash evaporation processes. However

the basic variables are the temperature drop from stage to stage

and the temperature differences between flashed vapor and cooling water. In this paper

the flash temperature difference function

the heat transfer TD function

and the total TD function are suggested. The proposed TD functions of MSF plant provide a convenient tool toanalyse the irreversible behavior and evaluate the thermodynamic efficiency of this system

because without such improvement the calculation of the thermodynamic efficiency of a MSF plant according to the classical formula will be not only inconvenient but also insignificant. As a result of present analysis

the reasonable parameters based on the energy consumption are easily chosen. The above-mentioned principles are confirmed by typical commercial plants and a pilot plant in Tianjin.

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