An analysis of performance on trisection helical baffles heat exchangers with diverse inclination angles and baffle structures

Abstract Investigations of thermo-hydraulic performance were conducted on five trisection helical baffle heat exchangers with different inclination angles, baffle shapes, or connection patterns, and one segmental baffle heat exchanger (SEG). A comparative analysis of three sector baffle schemes with inclination angles of 10° (10°S), 15° (15°S), and 20° (20°S); an ellipse baffle scheme with an inclination angle of 15° (15°E); and an axial overlap sector baffle scheme with an inclination angle of 20° (20°D) was performed. Local images were constructed to obtain pressure loss characteristics and flow field distributions. The flow field characteristics, such as the Dean vortex secondary flow and bypass leakage between adjacent baffles, are clearly shown and discussed. The same inclination angle schemes have completely different properties because of the baffle shapes or connection patterns. The performance of the end-to-end scheme is superior to that of the axial overlap scheme, and the ellipse baffle scheme is inferior to the sector baffle scheme. The 20°S scheme has the optimum comprehensive index and lowest shell-side pressure loss. The 10°S scheme has the highest shell-side Nusselt number and shell-side pressure loss, and can be selected only when heat transfer capability is very important in an engineering application.

[1]  Samad Jafarmadar,et al.  Tube bundle replacement for segmental and helical shell and tube heat exchangers: Experimental test and economic analysis , 2014 .

[2]  Min Zeng,et al.  EXPERIMENTAL AND NUMERICAL STUDIES ON SHELL-SIDE PERFORMANCE OF THREE DIFFERENT SHELL-AND-TUBE HEAT EXCHANGERS WITH HELICAL BAFFLES , 2011 .

[3]  Cong Dong,et al.  Impact of Block Plates on the Flow and Heat Transfer Performance of Middle-axial-overlap Helical Baffle Heat Exchangers , 2014 .

[4]  Karuppa Thundil R. Raj,et al.  Shell side numerical analysis of a shell and tube heat exchanger considering the effects of baffle inclination angle on fluid flow using CFD , 2012 .

[5]  Petr Stehlík,et al.  Different Strategies to Improve Industrial Heat Exchange , 2002 .

[6]  Yaping Chen,et al.  Numerical simulation on flow field in circumferential overlap trisection helical baffle heat exchanger , 2013 .

[7]  Jian Wen,et al.  Experimental investigation on performance comparison for shell-and-tube heat exchangers with different baffles , 2015 .

[8]  Lin Cheng,et al.  Effects of Shape and Quantity of Helical Baffle on the Shell-side Heat Transfer and Flow Performance of Heat Exchangers , 2014 .

[9]  Anas El Maakoul,et al.  Numerical comparison of shell-side performance for shell and tube heat exchangers with trefoil-hole, helical and segmental baffles , 2016 .

[10]  Ni Minglong.  Water to water heat transfer on shell-side of trisection helical baffle heat exchangers , 2012 .

[11]  Luhong Zhang,et al.  Numerical investigation of helical baffles heat exchanger with different Prandtl number fluids , 2013 .

[12]  Min Zeng,et al.  Review of Improvements on Shell-and-Tube Heat Exchangers With Helical Baffles , 2010 .

[13]  Farhad Nemati Taher,et al.  Tube bundle replacement for segmental and helical shell and tube heat exchangers: Performance comparison and fouling investigation on the shell side , 2013 .

[14]  Pan Chu,et al.  Design and optimization of heat exchangers with helical baffles , 2008 .

[15]  Zesen Nie,et al.  Experimental study of effects of baffle helix angle on shell-side performance of shell-and-tube heat exchangers with discontinuous helical baffles , 2015 .

[16]  Mehdi Bahiraei,et al.  A novel application for energy efficiency improvement using nanofluid in shell and tube heat exchanger equipped with helical baffles , 2015 .

[17]  Mehdi Bahiraei,et al.  Effects of geometrical parameters on hydrothermal characteristics of shell-and-tube heat exchanger with helical baffles: Numerical investigation, modeling and optimization , 2015 .

[18]  J. Lutcha,et al.  Performance improvement of tubular heat exchangers by helical baffles , 1990 .

[19]  Gongnan Xie,et al.  Experimental Study and Genetic-Algorithm-Based Correlation on Shell-Side Heat Transfer and Flow Performance of Three Different Types of Shell-and-Tube Heat Exchangers , 2007 .

[20]  Min Zeng,et al.  Shell-side Heat Transfer Enhancement for Shell-and-tube Heat Exchangers by Helical Baffles , 2010 .

[21]  Jin-Ping Wang,et al.  Experimental performance comparison of shell-and-tube oil coolers with overlapped helical baffles and segmental baffles , 2013 .

[22]  Min Zeng,et al.  Numerical investigation on combined multiple shell-pass shell-and-tube heat exchanger with continuous helical baffles , 2009 .

[23]  Min Zeng,et al.  Numerical Studies and Experimental Validation on Combined Parallel Multiple Shell-pass Shell-and-tube Heat Exchangers with Continuous Helical Baffles , 2010 .

[24]  Bin Li,et al.  Experimental performance comparison of shell-side heat transfer for shell-and-tube heat exchangers with middle-overlapped helical baffles and segmental baffles , 2009 .

[25]  Farhad Nemati Taher,et al.  Baffle space impact on the performance of helical baffle shell and tube heat exchangers , 2012 .

[26]  Ya-Ling He,et al.  Effects of baffle inclination angle on flow and heat transfer of a heat exchanger with helical baffles , 2008 .

[27]  Wen Jian,et al.  Numerical investigation on baffle configuration improvement of the heat exchanger with helical baffles , 2015 .

[28]  Bin Jiang,et al.  NUMERICAL STUDY OF THE SHELL−SIDE PERFORMANCE OF THE TRISECTION BAFFLED AND QUARTERN BAFFLED HEAT EXCHANGERS , 2014 .

[29]  Ting Ma,et al.  Recent development and application of several high-efficiency surface heat exchangers for energy conversion and utilization , 2014 .

[30]  Min Zeng,et al.  Effects of sealing strips on shell-side flow and heat transfer performance of a heat exchanger with helical baffles , 2014 .

[31]  Petr Stehlík,et al.  Helical Baffles in Shell-and-Tube Heat Exchangers, Part I: Experimental Verification , 1996 .