SCI和EI收录∣中国化工学会会刊

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. 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 Lin1,2, LUO Xionglin1, HOU Benquan1, BAI Yujie 1   

  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: 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