Optimization for the retrofit of large scale heat exchanger networks with comprising different intensified heat transfer techniques

CATEGORY: HEAT TRANSFER

Applied Thermal Engineering, Available online 21 April 2012, In Press, Accepted Manuscript

Optimization for the retrofit of large scale heat exchanger networks with comprising different intensified heat transfer techniques

Ming Pan a, Igor Bulatov a, Robin Smith a, Jin-Kuk Kim b

a Centre for Process Integration, School of Chemical Engineering and Analytical Science, The University of Manchester, Manchester, M13 9PL, United Kingdom

b Department of Chemical Engineering, Hanyang University, Wangsimni-ro 222, Seongdong-gu, Seoul, 133-791, Republic of Korea

Abstract

Intensified heat transfer (IHT) techniques can achieve significant energy saving in heat exchanger network (HEN) by facilitating heat transfer intensification without network topology modification.  Consequently, they have been widely used for retrofit in the process industry. Authors develop an optimization method for dealing with the retrofit of large scale HENs.

The location for implementing intensified heat transfer within the network and its degree of intensification are systematically identified and given objective function and design constraints, including topological limitation in the existing heat recovery systems. The optimization framework is based on the iterative optimization of a relatively simple mixed integer linear programming (MILP) which can handle computational difficulties associated with nonlinearity.  Authors demonstrate the validity of their approach with a large-size industrial case study.

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