Water network optimization with temperature constraints

LI Ruizhen; FENG Xiao; WANG Yufei

doi:10.11949/j.issn.0438-1157.20150142

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Water network optimization with temperature constraints

更新时间：2025-11-26

- Water network optimization with temperature constraints
- CIESC Journal Vol. 66, Issue 7, Pages: 2581-2587(2015)
- 作者机构：
  
  中国石油大学北京重质油国家重点实验室,北京,102249
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20150142
  CLC： Q021.8
- Online First：05 July 2015，
  
  Published：05 July 2015
- 稿件说明：
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LI Ruizhen, FENG Xiao, WANG Yufei. Water network optimization with temperature constraints[J]. CIESC Journal, 2015, 66(7): 2581-2587.
DOI：

LI Ruizhen, FENG Xiao, WANG Yufei. Water network optimization with temperature constraints[J]. CIESC Journal, 2015, 66(7): 2581-2587. DOI： 10.11949/j.issn.0438-1157.20150142.

摘要

实际用水过程有温度的要求

在用水网络集成中考虑温度的约束

使水耗和能耗同时降低

具有重要的意义。此外

过程系统中还存在只有温度限制的与用水无关的过程流股

将水网络中的水流股与其同时考虑热集成

可以使能量得到更合理的分配利用。在全过程系统能量集成的背景下

建立了对应的水网络优化方法。首先使用现有的废水直接回用水网络LP模型求解初始水网络并提取流股数据

然后在4条非等温混合规则的判断下

依次比较水网络流股与背景夹点、全过程夹点的关系

以排除不合理的非等温混合

最后以年总费用最低为目标进行全过程系统的热集成。使用本文提出的方法对某案例进行优化

得到的年总费用减少了6.27%

证明了该方法的可行性。

Abstract

In a practical water using process

a temperature requirement exists. Thus

it is significant to consider the temperature constraint in water network integration to decrease the water and energy consumption at the same time. Besides

there are non-water process streams which only have temperature requirements in the process system. If these streams are integrated with water streams in the water network

better energy efficiency can be reached. In this paper

a method for optimizing water networks is proposed under the background of heat integration in whole process system. First

an LP model is established to obtain the initial status of the water network and stream data. Then

four rules for non-isothermal mixing are proposed by comparing the relative position of water streams with the background and whole process pinches to exclude the irrational non- isothermal mixing. Finally

the heat integration in the whole system is performed with minimal total annual cost as the objective function. A case study is used to show the feasibility of the method

which can get a decrease of 6.27% in the annual cost.

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