A Two-step Design Method for Shaft Work Targeting on Low-temperature Process

doi:10.1016/S1004-9541(14)60081-1

Chin.J.Chem.Eng. ›› 2014, Vol. 22 ›› Issue (6): 664-668.DOI: 10.1016/S1004-9541(14)60081-1

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A Two-step Design Method for Shaft Work Targeting on Low-temperature Process

LUO Yiqing¹, FENG Shengke¹, SUN Changjiang², YUAN Xigang ¹

1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
2. Beijing Risun Chemical Technologies Institute Company Limited, Beijing 100070, China

Received:2013-08-13 Revised:2013-09-09 Online:2014-06-06 Published:2014-06-28
Supported by:
Supported by the National Basic Research Program of China (2010CB720500) and the National Natural Science Foundation (21176178).

A Two-step Design Method for Shaft Work Targeting on Low-temperature Process

罗祎青¹, 冯胜科¹, 孙长江², 袁希钢¹

1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
2. Beijing Risun Chemical Technologies Institute Company Limited, Beijing 100070, China

通讯作者: TIAN Wende
基金资助:
Supported by the National Basic Research Program of China (2010CB720500) and the National Natural Science Foundation (21176178).

Abstract

Abstract: In low-temperature processes, there are interactions between heat exchanger network (HEN) and refrigeration system. The modification on HEN of the chilling train for increasing energy recovery does not always coordinate with the minimum shaft work consumption of the corresponding refrigeration system. In this paper, a systematic approach for optimizing low-temperature system is presented through mathematical method and exergy analysis. The possibility of "pockets", which appears as right nose section in the grand composite curve (EGCC) of the process, is first optimized. The EGCC with the pockets cutting down is designed as a separate part. A case study is used to illustrate the application of the approach for a HEN of a chilling train with propylene and ethylene refrigerant system in an ethylene production process.

Key words: exergy, shaft work, heat exchanger network, cold pocket, low-temperature process, optimization

摘要： In low-temperature processes, there are interactions between heat exchanger network (HEN) and refrigeration system. The modification on HEN of the chilling train for increasing energy recovery does not always coordinate with the minimum shaft work consumption of the corresponding refrigeration system. In this paper, a systematic approach for optimizing low-temperature system is presented through mathematical method and exergy analysis. The possibility of "pockets", which appears as right nose section in the grand composite curve (EGCC) of the process, is first optimized. The EGCC with the pockets cutting down is designed as a separate part. A case study is used to illustrate the application of the approach for a HEN of a chilling train with propylene and ethylene refrigerant system in an ethylene production process.

关键词: exergy, shaft work, heat exchanger network, cold pocket, low-temperature process, optimization

LUO Yiqing, FENG Shengke, SUN Changjiang, YUAN Xigang . A Two-step Design Method for Shaft Work Targeting on Low-temperature Process[J]. Chin.J.Chem.Eng., 2014, 22(6): 664-668.

罗祎青, 冯胜科, 孙长江, 袁希钢. A Two-step Design Method for Shaft Work Targeting on Low-temperature Process[J]. Chinese Journal of Chemical Engineering, 2014, 22(6): 664-668.

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A Two-step Design Method for Shaft Work Targeting on Low-temperature Process

A Two-step Design Method for Shaft Work Targeting on Low-temperature Process

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