Bypass Selection for Control of Heat Exchanger Network

doi:10.1016/S1004-9541(13)60472-5

Chinese Journal of Chemical Engineering ›› 2013, Vol. 21 ›› Issue (3): 276-284.DOI: 10.1016/S1004-9541(13)60472-5

• 过程系统工程与过程安全 • 上一篇下一篇

Bypass Selection for Control of Heat Exchanger Network

孙琳^1,2, 罗雄麟¹, 侯本权¹, 白玉杰¹

1 Research Institute of Automation, China University of Petroleum, Beijing 102249, China ;
2 Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, BC V6T1Z3, Canada

收稿日期:2012-07-20 修回日期:2012-11-05 出版日期:2013-03-28 发布日期:2013-04-01
通讯作者: SUN Lin
基金资助:
Supported by the National Natural Science Foundation of China (21006127), the National Basic Research Program of China (2012CB720500) and the Science Foundation of China University of Petroleum, Beijing (YJRC-2011-11).

Bypass Selection for Control of Heat Exchanger Network

SUN Lin^1,2, LUO Xionglin¹, HOU Benquan¹, BAI Yujie ¹

1 Research Institute of Automation, China University of Petroleum, Beijing 102249, China ;
2 Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, BC V6T1Z3, Canada

Received:2012-07-20 Revised:2012-11-05 Online:2013-03-28 Published:2013-04-01
Supported by:
Supported by the National Natural Science Foundation of China (21006127), the National Basic Research Program of China (2012CB720500) and the Science Foundation of China University of Petroleum, Beijing (YJRC-2011-11).

摘要/Abstract

摘要： Considering the flexibility and controllability of heat exchanger networks (HENs), bypasses are widely used for effective control of process stream target temperatures. However, the optimal location for the bypass is generally difficult to design with the trade-off between controllability and capital investments. In this paper, based on the steady-state model of heat exchanger networks the optimal bypass location was firstly selected by iteratively calculating the non-square Relative Gain Array (ns-RGA). To simplify the calculation process, rules of bypass selection were also proposed. In order to evaluate this method, then, the structural controllability of heat exchanger networks was analyzed. With both the consideration of the controllability and capital investments, the bypasses locations were finally selected. A case study on the HEN in Crude Distillation Unit was presented in which the ns-RGA and structural controllability were used to select bypasses and also to evaluate the results.

关键词: heat exchanger networks, bypass, process control, non-square Relative Gain Array, structural controllability

Abstract: Considering the flexibility and controllability of heat exchanger networks (HENs), bypasses are widely used for effective control of process stream target temperatures. However, the optimal location for the bypass is generally difficult to design with the trade-off between controllability and capital investments. In this paper, based on the steady-state model of heat exchanger networks the optimal bypass location was firstly selected by iteratively calculating the non-square Relative Gain Array (ns-RGA). To simplify the calculation process, rules of bypass selection were also proposed. In order to evaluate this method, then, the structural controllability of heat exchanger networks was analyzed. With both the consideration of the controllability and capital investments, the bypasses locations were finally selected. A case study on the HEN in Crude Distillation Unit was presented in which the ns-RGA and structural controllability were used to select bypasses and also to evaluate the results.

Key words: heat exchanger networks, bypass, process control, non-square Relative Gain Array, structural controllability

孙琳, 罗雄麟, 侯本权, 白玉杰. Bypass Selection for Control of Heat Exchanger Network[J]. Chinese Journal of Chemical Engineering, 2013, 21(3): 276-284.

SUN Lin, LUO Xionglin, HOU Benquan, BAI Yujie . Bypass Selection for Control of Heat Exchanger Network[J]. Chin.J.Chem.Eng., 2013, 21(3): 276-284.

参考文献

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Bypass Selection for Control of Heat Exchanger Network

Bypass Selection for Control of Heat Exchanger Network

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