Application of entransy theory on structure optimization of serrated fin in plate-fin heat exchanger

Abstract The effects of geometrical parameters of serrated fin in plate-fin heat exchanger (PFHE) on entransy-dissipation-based thermal resistance (EDTR) caused by heat transfer (Rht) and fluid friction (Rff) are investigated by design of experiment(DOE) and response surface methodology (RSM) in this paper. The results show that the fin height, fin interrupted length and fin space are positively correlated with Rht, while the fin thickness and PFHE length are negatively correlated with Rht. Rff is far larger than Rht, for about an order of magnitude, and Rff increases almost linearly with the increase of Re when geometric parameters are fixed. Rff increases with fin thickness and PFHE length, and decreases with fin height, fin interrupted length and fin space. Furthermore, Multi-objective Genetic Algorithm (MOGA) is carried out. Compared with the original design, Rht of optimal structure 1 and 2 obtained based on two objectives of minimizing Rff and minimizing Rht reduces by 27.9% and 41.2%, respectively, and Rff reduces by 65.3% and 55.8% respectively. Compared with the optimal results based on traditional objective functions (maximize j and minimize f), Rht and Rff obtained based on EDTR objective functions reduce by an average of 37.6% and 30.3% respectively, and the JF factor of EDTR optimal results increases by an average of 10.1%.The results show that the optimization results based on EDTR objective functions are better than that based on traditional objective functions for serrated fin in PFHE.

[1]  Mingtian Xu,et al.  Entransy dissipation number and its application to heat exchanger performance evaluation , 2009 .

[2]  X. Ming,et al.  AN APPLICATION OF ENTRANSY DISSIPATION THEORY TO HEAT EXCHANGER DESIGN , 2009 .

[3]  A. L. London,et al.  Laminar Flow Forced Convection Heat Transfer and Flow Friction in Straight and Curved Ducts - A Summary of Analytical Solutions , 1971 .

[4]  Lihua Guo,et al.  Lubricant side thermal-hydraulic characteristics of steel offset strip fins with different flow angles , 2008 .

[5]  Alberto Fichera,et al.  Optimization of a liquefaction plant using genetic algorithms , 2001 .

[6]  J. Tu,et al.  Optimization investigation on configuration parameters of sine wavy fin in plate-fin heat exchanger based on fluid structure interaction analysis , 2018, International Journal of Heat and Mass Transfer.

[7]  Xin-gang Liang,et al.  Entransy definition and its balance equation for heat transfer with vaporization processes , 2015 .

[8]  Jiangfeng Guo,et al.  Multi-objective optimization of heat exchanger based on entransy dissipation theory in an irreversible Brayton cycle system , 2013 .

[9]  J. E. Hesselgreaves.  Rationalisation of second law analysis of heat exchangers , 2000 .

[10]  R. M. Manglik,et al.  Heat transfer and pressure drop correlations for the rectangular offset strip fin compact heat exchanger , 1995 .

[11]  A. Bejan,et al.  Entropy Generation Through Heat and Fluid Flow , 1983 .

[12]  Thomas J. Santner,et al.  Design and analysis of computer experiments , 1998 .

[13]  Fengrui Sun,et al.  Entransy dissipation minimization for generalized heat exchange processes , 2016 .

[14]  C. Lee,et al.  Heat-Transfer and Friction Characteristics for the Louver-Fin Heat Exchanger , 2004 .

[15]  Wang Cai,et al.  Numerical study on air-side performance of an integrated fin and micro-channel heat exchanger , 2010 .

[16]  Yanzhong Li,et al.  Thermal design and optimization of plate-fin heat exchangers based global sensitivity analysis and NSGA-II , 2018 .

[17]  A. Bejan.  Second law analysis in heat transfer , 1980 .

[18]  Yanzhong Li,et al.  Optimization investigation on configuration parameters of serrated fin in plate-fin heat exchanger using genetic algorithm , 2016 .

[19]  Y. Hwang,et al.  Applicability of entransy dissipation based thermal resistance for design optimization of two-phase heat exchangers , 2013 .

[20]  An experimental investigation into rational enhancement of convective heat transfer in rectangular interrupted ducts of plate-fin heat-transfer surfaces , 2006 .

[21]  Xin Gu,et al.  Multi-parameter optimization of shell-and-tube heat exchanger with helical baffles based on entransy theory , 2018 .

[22]  XueTao Cheng,et al.  Entransy analysis of open thermodynamic systems , 2012 .

[23]  M. Khoshvaght-Aliabadi,et al.  Role of channel shape on performance of plate-fin heat exchangers: Experimental assessment , 2014 .

[24]  XinGang Liang,et al.  Entransy—A physical quantity describing heat transfer ability , 2007 .

[25]  Mingtian Xu,et al.  The Application of Entransy Dissipation Theory in Optimization Design of Heat Exchanger , 2012 .

[26]  R. Shah,et al.  Compact Heat Exchangers , 1990 .

[27]  Min-Kyu Kim,et al.  Optimal design of electric machine using genetic algorithms coupled with direct method , 1999 .

[28]  Sun Lijuan,et al.  Application of entransy-dissipation-based thermal resistance for performance optimization of spiral-wound heat exchanger , 2018 .

[29]  Wen-Quan Tao,et al.  Effectiveness–thermal resistance method for heat exchanger design and analysis , 2010 .

[30]  Guo Zengyuan,et al.  Physical Mechanism of Heat Conduction Ability Dissipation and Its Analytical Expression , 2007 .

[31]  C. Wang,et al.  Entransy analysis on boiler air pre-heater with multi-stage LHS unit , 2018 .

[32]  Ke Li,et al.  Energy and cost optimization of shell and tube heat exchanger with helical baffles using Kriging metamodel based on MOGA , 2016 .

[33]  Yu Wang,et al.  Heat transfer and hydrodynamics analysis of a novel dimpled tube , 2010 .

[34]  Kwan-Soo Lee,et al.  Analysis of heat transfer and pressure drop characteristics in an offset strip fin heat exchanger , 2009 .

[35]  Zaoxiao Zhang,et al.  Application of response surface method and multi-objective genetic algorithm to configuration optimization of Shell-and-tube heat exchanger with fold helical baffles , 2018 .

[36]  Sonja Kuhnt,et al.  Design and analysis of computer experiments , 2010 .