New method for heat exchanger network retrofit using heat exchanger load diagram

被引：0
|
作者：
Li B. [1 ]
Li J. [1 ]
机构：
[1] Department of Chemical Engineering, Dalian Minzu University, Dalian, 116600, Liaoning
来源：
Huagong Xuebao/CIESC Journal | 2020年 / 71卷 / 03期
关键词：
Heat exchanger load diagram; Heat transfer; Optimization; Process system; Retrofit;
D O I：
10.11949/0438-1157.20190948
中图分类号：
学科分类号：
摘要：
At present, most graphic tools are only suitable for the design or retrofit of heat exchange networks (HEN) with the goal of saving energy. The increase of energy recovery is often accompanied by the increase of the number of heat exchange units, and the number of heat exchange units obviously affects the total equipment costs. A new method for the retrofit of heat exchanger networks by using heat exchanger load diagram (HELD) is proposed. Based on pinch analysis, selecting targeted matches and reconstructing the HELD, the problem is simplified. By shifting the heat flow curve horizontally, those cross-pinch heat loads are re-matched to reduce utility consumption, and the number of heat exchangers in the retrofitted heat exchanger network can be reduced as much as possible with the help of some heuristics. An industrial case of paper mill is retrofitted to demonstrate the effectiveness of the proposed approach. Compared with reported solutions, two new retrofit networks with similar energy saving values and fewer heat exchangers are obtained. © All Right Reserved.
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页码：1288 / 1296
页数：8
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