Inter-plant waste heat integration for industrial park using two medium fluids

WU Changhao; LIU Linlin; ZHANG Lei; DU Jian

doi:10.11949/j.issn.0438-1157.20181145

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Inter-plant waste heat integration for industrial park using two medium fluids

Process system engineering | 更新时间：2026-07-24

- Inter-plant waste heat integration for industrial park using two medium fluids
- CIESC Journal Vol. 70, Issue 2, Pages: 431-439(2019)
- 作者机构：
  
  大连理工大学化工学院化工系统工程研究所，辽宁大连 116024
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20181145
  CLC： TQ 021.8
- Received：08 October 2018，
  
  Revised：2018-10-22，
  
  Online First：16 June 2020，
  
  Published：05 February 2019
- 稿件说明：
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吴长昊, 刘琳琳, 张磊, 都健. 采用两种中间介质的工业园区厂际余热集成[J]. 化工学报, 2019, 70(2): 431-439

WU Changhao, LIU Linlin, ZHANG Lei, DU Jian. Inter-plant waste heat integration for industrial park using two medium fluids[J]. CIESC Journal, 2019, 70(2): 431-439
吴长昊, 刘琳琳, 张磊, 都健. 采用两种中间介质的工业园区厂际余热集成[J]. 化工学报, 2019, 70(2): 431-439 DOI： 10.11949/j.issn.0438-1157.20181145.

WU Changhao, LIU Linlin, ZHANG Lei, DU Jian. Inter-plant waste heat integration for industrial park using two medium fluids[J]. CIESC Journal, 2019, 70(2): 431-439 DOI： 10.11949/j.issn.0438-1157.20181145.

摘要

发挥园区集群效应，借助中间介质回路将工业园区中各单厂内的余热于厂际间进一步回收利用，能够显著提高园区整体能源效率。其中，中间介质回路的设置与介质的选择将关系到整个余热回收系统的最优设计与节能效果。因此，不同于目前研究仅采用一种中间介质的集成策略，同时选用热水和导热油为介质开展厂际余热集成研究。提出耦合介质与厂内流股换热及介质流股在厂际间分配的换热器网络超结构，以年度总费用最小为目标建立MINLP热集成数学模型，优化获得包含介质回路结构与厂内换热器网络结构等内容的园区余热集成结果。最后，在一个包含3个厂的厂际余热集成案例中，分别研究了单种介质单回路、单种介质双回路及双种介质双回路3种情况，通过对比验证了所提方法的有效性。

Abstract

Considering the cluster effect of industrial park

it is expectable that could improve energy efficiency of the entire park by recovering the waste heat in each single plant

via

inter-plant medium fluids which absorb heat in some plants and release heat into other plants. Obviously

the selection of heat exchange medium and the setting of medium heat recovery loop will highly affect the optimal design of the waste heat recovery system and the energy-saving effect. Thus

other than single medium integration strategy

this work uses both hot water and thermal oil as mediums to implement the inter-plant waste hea

t integration. A heat exchanger network (HEN) superstructure coupling the matches between medium fluids and inner-plant process streams and the allocation of medium streams across plants is proposed. Accordingly

a mixed-integer non-linear programming (MINLP) model is formulated for network optimization aiming at the target of minimum total annual cost. At last

an example involving three plants is studied in three synthesis cases (single medium-single loop

single medium-dual loops

and dual mediums-dual loops). The effectiveness of the proposed method was verified by comparison.

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Keywords

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