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Heat Exchanger Network Dynamic Analysis
Author(s) -
Young Brent R.,
Westphalen Denis L.,
Svrcek William Y.
Publication year - 2006
Publication title -
developments in chemical engineering and mineral processing
Language(s) - English
Resource type - Journals
eISSN - 1932-2143
pISSN - 0969-1855
DOI - 10.1002/apj.5500140317
Subject(s) - heat exchanger , flexibility (engineering) , process integration , process (computing) , heuristic , capital cost , dynamic simulation , process control , process engineering , computer science , engineering , mechanical engineering , simulation , statistics , mathematics , electrical engineering , artificial intelligence , operating system
The continued high cost of energy has mandated that the Chemical Process Industries reduce operational and capital costs through process heat integration. However, the heat integration of process streams can lead to process structures that are difficult to operate and control. This paper addresses the control of heat exchanger networks and it shows the importance of dynamic simulations in the synthesis of workable control structures. Steady‐state simulations were used to delineate the trade‐off between flexibility and capital costs of networks. Dynamic simulations were used to assess the placement of the by‐pass on the process‐to‐process heat exchangers. Steady‐state and dynamic simulations showed that the use of stream splitting should be avoided as a control scheme. The analysis of several simple case studies allowed the proposal of heuristic rules to identify the best control strategy for a heat exchanger network.