Heat transfer intensification for retrofitting heat exchanger networks with considering exchanger detailed performances. Issue 6 (14th January 2018)

• Record Type: Journal Article
• Authors: Pan, Ming; Bulatov, Igor; Smith, Robin
• Is Part Of: AIChE journal. Volume 64:Issue 6(2018)
• Page Start: 2052
• Page End: 2077
• Publication Date: 2018-01-14
• Subjects: heat exchanger network (HEN) -- retrofit -- optimization -- mixed integer linear programming (MILP) -- iteration; Chemical engineering -- Periodicals; Génie chimique -- Périodiques; 660.28
• DOI: 10.1002/aic.16075
• Languages: English
• ISSNs: 0001-1541

Abstract

Abstract : The challenging of this work is to present a thorough study of implementing heat transfer intensification in heat exchanger network (HEN) retrofitting, including all details of exchanger geometry, stream bypassing and splitting, temperature‐variation of properties, LMTD and its correction, and pressure drops. This leads to very complex mixed integer nonlinear programming (MINLP) problems rarely reported before. By adopting the MILP‐based iterative approach proposed in the earlier work (Pan et al., Chem Eng Sci. 2013;104:498–524.), temperature‐variation of properties, LMTD and its correction are initialized to parameters at first, and the rest nonlinear terms are then linearized and expressed as first‐order Taylor series expansions. Finally, two iteration loops are executed to find optimal solutions. A small‐scale motivating problem and an industrial scale problem are presented to demonstrate the validity and efficiency of the proposed methods. © 2018 American Institute of Chemical Engineers AIChE J, 64: 2052–2077, 2018