Optimal geometry and flow arrangement for minimizing the cost of shell‐and‐tube condensers

This paper presents a model for estimating the total cost of shell-and-tube heat exchangers (HEs) with condensation in tubes or in the shell, as well as a designing strategy for minimizing this cost. The optimization process is based on a genetic algorithm. The global cost includes the energy cost (i.e. pumping power) and the initial purchase cost of the exchanger. The choice of the best exchanger is based on its annualized total cost. Eleven design variables are optimized. Ten are associated with the HE geometry: tube pitch, tube layout patterns, baffle spacing at the center, baffle spacing at the inlet and outlet, baffle cut, tube-to-baffle diametrical clearance, shell-to-baffle diametrical clearance, tube bundle outer diameter, shell diameter, and tube outer diameter. The last design variable indicates whether the condensing fluid should flow in the tubes or in the shell. Two case studies are presented and the results obtained show that the procedure can rapidly identify the best design for a given heat transfer process between two fluids, one of which is condensing. Copyright © 2008 John Wiley & Sons, Ltd.

[1]  D. Gulley.  More accurate exchanger shell-side pressure drop calculations. Use this method to reduce equipment size and pumping power cost , 2004 .

[2]  Pradeep Bansal,et al.  An overview of condensation heat transfer on horizontal tube bundles , 1999 .

[3]  Karl Stephan,et al.  Modelling and simulation of the dynamic behaviour of a shell-and-tube condenser , 1997 .

[4]  D. Chisholm,et al.  Two-Phase Flow on the Shell-Side of a Segmentally Baffled Shell-and-Tube Heat Exchanger , 1979 .

[5]  Louis Gosselin,et al.  Minimizing shell‐and‐tube heat exchanger cost with genetic algorithms and considering maintenance , 2007 .

[6]  E. Damangir,et al.  Minimizing capital and operating costs of shell and tube condensers using optimum baffle spacing , 2004 .

[7]  Yusuf Ali Kara,et al.  A computer program for designing of shell-and-tube heat exchangers , 2004 .

[8]  Christopher R. Houck,et al.  A Genetic Algorithm for Function Optimization: A Matlab Implementation , 2001 .

[9]  Cihat Arslanturk,et al.  Modeling of central domestic water heater for buildings , 2004 .

[10]  Dogan Eryener,et al.  Thermoeconomic optimization of baffle spacing for shell and tube heat exchangers , 2006 .

[11]  Savvas A. Tassou,et al.  A mathematical model of the heat transfer process in a shell and tube condenser for use in refrigeration applications , 1981 .

[12]  Salman Ajib,et al.  Effect of tube pitch on heat transfer in shell-and-tube heat exchangers—new simulation software , 2006 .

[13]  Reza Yahyaabadi.  Analysing F-shell heat exchangers , 2005 .

[14]  D. P. Sekulic,et al.  Fundamentals of Heat Exchanger Design , 2003 .

[15]  Zahid H. Ayub.  A new chart method for evaluating single-phase shell side heat transfer coefficient in a single segmental shell and tube heat exchanger , 2005 .

[16]  S. L. Pandharipande,et al.  Modelling of heat exchangers: Using artificial neural network , 2004 .

[17]  Henrique A. Matos,et al.  A Cost-Based Strategy to Design Multiple Shell and Tube Heat Exchangers , 2004 .

[18]  John C. Chato,et al.  Laminar condensation inside horizontal and inclined tubes , 1960 .

[19]  M. Serna,et al.  An Efficient Method for the Design of Shell and Tube Heat Exchangers , 2004 .

[20]  Karl Stephan,et al.  An experimental investigation of the dynamic behaviour of a shell-and-tube condenser , 1997 .

[21]  S. Chand,et al.  Modeling for shell-side pressure drop for liquid flow in shell-and-tube heat exchanger , 2006 .

[22]  Ji De-wei.  Modelbase of Tube-and-shell Heat Exchangers and Its Application to Simulation of Heat Exchanger Networks , 2005 .

[23]  Reşat Selbaş,et al.  A new design approach for shell-and-tube heat exchangers using genetic algorithms from economic point of view , 2006 .

[24]  M. Serna,et al.  A Compact Formulation of the Bell–Delaware Method for Heat Exchanger Design and Optimization , 2005 .