Design of heat exchanger network based on entransy theory

doi:10.1016/j.cjche.2017.10.007

Chin.J.Chem.Eng. ›› 2018, Vol. 26 ›› Issue (8): 1692-1699.DOI: 10.1016/j.cjche.2017.10.007

• Selected Papers from the Chinese Process Systems Engineering Annual Meeting 2017 • Previous Articles Next Articles

Design of heat exchanger network based on entransy theory

Li Xia, Yuanli Feng, Xiaoyan Sun, Shuguang Xiang

Institute of Process System Engineering, Qingdao University of Science and Technology, Qingdao 266042, China

Received:2017-08-29 Online:2018-09-21 Published:2018-08-28
Contact: Shuguang Xiang,E-mail address:xsg@qust.edu.cn
Supported by:
Supported the National Natural Science Foundation of China (21406124).

Design of heat exchanger network based on entransy theory

Li Xia, Yuanli Feng, Xiaoyan Sun, Shuguang Xiang

Institute of Process System Engineering, Qingdao University of Science and Technology, Qingdao 266042, China

通讯作者: Shuguang Xiang,E-mail address:xsg@qust.edu.cn
基金资助:
Supported the National Natural Science Foundation of China (21406124).

Abstract

Abstract: The heat exchanger network (HEN) synthesis problem based on entransy theory is analyzed. According to the characteristics of entransy representation of thermal potential energy, the entransy dissipation represents the irreversibility of the heat transfer process, the temperature difference determines the entransy dissipation, and four HEN design steps based on entransy theory are put forward. The present study shows how it is possible to set energy targets based on entransy and achieve them with a network of heat exchangers by an example of heat exchanger network design for four streams. In order to verify the correctness of the heat exchanger networks design method based on entransy theory, the synthesis of the HEN for the diesel hydrogenation unit is studied. Using the heat exchange networks design method based on entransy theory, the HEN obtained is consistent with energy targets. The entransy transfer efficiency of HEN based on entransy theory is 92.29%, higher than the entransy transfer efficiency of the maximum heat recovery network based on pinch technology.

Key words: Process systems, Heat exchanger network synthesis, Heat transfer, Entransy, Energy target, Pinch

摘要： The heat exchanger network (HEN) synthesis problem based on entransy theory is analyzed. According to the characteristics of entransy representation of thermal potential energy, the entransy dissipation represents the irreversibility of the heat transfer process, the temperature difference determines the entransy dissipation, and four HEN design steps based on entransy theory are put forward. The present study shows how it is possible to set energy targets based on entransy and achieve them with a network of heat exchangers by an example of heat exchanger network design for four streams. In order to verify the correctness of the heat exchanger networks design method based on entransy theory, the synthesis of the HEN for the diesel hydrogenation unit is studied. Using the heat exchange networks design method based on entransy theory, the HEN obtained is consistent with energy targets. The entransy transfer efficiency of HEN based on entransy theory is 92.29%, higher than the entransy transfer efficiency of the maximum heat recovery network based on pinch technology.

关键词: Process systems, Heat exchanger network synthesis, Heat transfer, Entransy, Energy target, Pinch

Li Xia, Yuanli Feng, Xiaoyan Sun, Shuguang Xiang. Design of heat exchanger network based on entransy theory[J]. Chin.J.Chem.Eng., 2018, 26(8): 1692-1699.

Li Xia, Yuanli Feng, Xiaoyan Sun, Shuguang Xiang. Design of heat exchanger network based on entransy theory[J]. Chinese Journal of Chemical Engineering, 2018, 26(8): 1692-1699.

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Design of heat exchanger network based on entransy theory

Design of heat exchanger network based on entransy theory

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