Research on optimization of self-utilization performance of air compression waste heat in air separation system

被引：0

作者：

Rong-Yang Y. ^{[1
,2
]}

Wu Q. ^{[3
]}

Zhou X. ^{[1
,2
]}

Fang S. ^{[1
,2
]}

Wang K. ^{[1
,2
]}

Qiu L. ^{[1
,2
]}

Zhi X. ^{[1
,2
]}

机构：

[1] Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou

[2] Key Laboratory of Refrigeration and Cryogenic Technology of Zhejiang Province, Hangzhou

[3] Hangzhou Oxygen Plant Group Co., Ltd., Hangzhou

来源：

Huagong Xuebao/CIESC Journal | 2021年 / 72卷 / 03期

关键词：

Air compressor; Economics; Firefly algorithm; Organic Rankine cycle; Thermodynamics process; Vapor compression refrigeration; Waste heat recovery;

D O I：

10.11949/0438-1157.20200747

中图分类号：

学科分类号：

摘要：

To explore the feasible method of using the air compression heat in the large-scale air separation unit, it was proposed to use the compression heat to drive the organic Rankine - vapor compression refrigeration coupling cycle. The cooling capacity was used to cool down compressors inlet air, to achieve the purpose of self-utilization of compression heat and self-enhancing of compression process. Taking the compression process in a 60000 m3/h scale air separation unit as an example, MATLAB was used to model the compression heat self-utilization system. Further, with the goal of maximizing the system economy, firefly algorithm was used for the optimization of heat exchange area of the main evaporators in typical humidity area. The result shows that when the relative humidity of the inlet air is 70% and 30%, the energy saving rate of the multi-stage air compression heat self-utilization system can reach 4.4% and 4.6%, respectively, and the payback time is 4.4 a and 5.5 a, respectively. The system shows better energy-saving effect and higher economic value. © 2021, Editorial Board of CIESC Journal. All right reserved.

引用

页码：1654 / 1666

页数：12

共 28 条

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