THERMAL SCIENCE

International Scientific Journal

Authors of this Paper

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Dazhang Yang

,

Naixin Wang

,

Jing Xie

,

Jinfeng Wang

A COMPREHENSIVE NUMERICAL STUDY OF ENERGY EFFICIENCY ANALYSIS OF A DOUBLE PIPE GAS COOLER BASED ON SECOND LAW ANALYSIS

ABSTRACT
A numerical simulation of energy efficiency in commercially available double pipe heat exchangers in the market was investigated based on the Second law of thermodynamics in this paper. The effects of CO2 mass-flow rate, water mass-flow rate, pressure, CO2 inlet temperature, and water inlet temperature of the double pipe heat exchanger were considered to evaluate the energy efficiency by analyzing entropy generation, exergy destruction, and entransy dissipation. The changes of the entropy generation, the changes of exergy destruction, and entransy dissipation are similar regardless of the operating conditions. Pressure has the most significant effect on the energy efficiency of the double pipe gas cooler compared to other operating conditions but negligible on the exergy destruction. The pressure, flow rate, and inlet temperature have completely different effects on energy efficiency depending on the region. The entropy generation and entransy dissipation at y = 0 m to y = 0.05 m (y-axis is the radial direction) decrease with increasing pressure and the opposite after that. The increase of CO2 inlet temperature at y < 0.5 m is accompanied by an increase of entropy generation, exergy destruction, and entransy dissipation but this situation disappears after y = 0.5 m. Entropy generation, exergy destruction, and CO2 and water mass-flow rate are first negatively and then positively correlated with the cut-off point at y = 0.1 m.
KEYWORDS
entropy generation, exergy destruction, entransy dissipation, supercritical CO2
PAPER SUBMITTED: 2021-07-19
PAPER REVISED: 2021-10-15
PAPER ACCEPTED: 2021-11-04
PUBLISHED ONLINE: 2022-05-22
DOI REFERENCE: https://doi.org/10.2298/TSCI210719052Y
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Issue 6, PAGES [4711 - 4722]
REFERENCES
  1. Sadighi Dizaji, H., et al., A Comprehensive Second Law Analysis For Tube-In-Tube Helically Coiled Heat Exchangers, Exp. Therm. Fluid Sci., 76 (2016), pp. 118-125
  2. Liu, X., et al., Numerical Study Of The Effect Of Buoyancy Force And Centrifugal Force On Heat Transfer Characteristics Of Supercritical CO2 In Helically Coiled Tube At Various Inclination Angles, Appl. Therm. Eng., 116 (2017), pp. 500-515
  3. Zhang, S., et al., Experimental Investigation On The Heat Transfer Characteristics Of Supercritical CO2 At Various Mass Flow Rates In Heated Vertical-Flow Tube, Appl. Therm. Eng., 157 (2019), pp. 113687
  4. Zhang, G.W., et al., Experimental And Simulation Investigation On Heat Transfer Characteristics Of In-Tube Supercritical CO2 Cooling Flow, Appl. Therm. Eng., 143 (2018), pp. 1101-1113
  5. Joneydi Shariatzadeh, O., et al., Comparison Of Transcritical CO2 Refrigeration Cycle With Expander And Throttling Valve Including/Excluding Internal Heat Exchanger: Exergy And Energy Points Of View, Appl. Therm. Eng., 93 (2016), pp. 779-787
  6. Wang, Y., et al., Energy, Exergy And Exergoeconomic Evaluation Of The Air Source Transcritical CO2 Heat Pump With Internal Heat Exchanger For Space Heating, Int. J. Refrig., (2021)
  7. Elbarghthi, A.F.A., et al., An Experimental Study Of An Ejector-Boosted Transcritical R744 Refrigeration System Including An Exergy Analysis, Energy Convers. Manag., 238 (2021), pp. 114102
  8. Zhang, H., et al., Heat Transfer Performance Of Supercritical Pressure CO2 In A Non-Uniformly Heated Horizontal Tube, Int. J. Heat Mass Transf., 155 (2020), pp. 119748
  9. Liu, X., et al., Flow Structure With Mixed Turbulent Flow Of Supercritical CO2 Heated In Helically Coiled Tube, Appl. Therm. Eng., 189 (2021), pp. 116684
  10. Yang, Z., et al., Effects Of Longitudinal Vortex Generators On The Heat Transfer Deterioration Of Supercritical CO2 In Vertical Tubes, Int. J. Heat Mass Transf., 152 (2020), pp. 119478
  11. Sun, F., et al., An Artificial-Neural-Network Based Prediction Of Heat Transfer Behaviors For In-Tube Supercritical CO2 Flow, Appl. Soft Comput., 102 (2021), pp. 107110
  12. Luo, Z., et al., Prediction Of "Critical Heat Flux" For Supercritical Water And CO2 Flowing Upward In Vertical Heated Tubes, Int. J. Heat Mass Transf., 159 (2020), pp. 120115
  13. Yang, J., et al., Improved Genetic Algorithm-Based Prediction Of A CO2 Micro-Channel Gas-Cooler Against Experimental Data In Automobile Air Conditioning System, Int. J. Refrig., 106 (2019), pp. 517-525
  14. Li, J., et al., Experimental And Numerical Study Of An Integrated Fin And Micro-Channel Gas Cooler For A CO2 Automotive Air-Conditioning, Appl. Therm. Eng., 116 (2017), pp. 636-647
  15. Wang, D., et al., Heating Performance Evaluation Of A CO2 Heat Pump System For An Electrical Vehicle At Cold Ambient Temperatures, Appl. Therm. Eng., 142 (2018), July, pp. 656-664
  16. Cai, H. fei, et al., Numerical Investigation On Heat Transfer Of Supercritical Carbon Dioxide In The Microtube Heat Exchanger At Low Reynolds Numbers, Int. J. Heat Mass Transf., 151 (2020), pp. 119448
  17. Katz, A., et al., Experimental Investigation Of Pressure Drop And Heat Transfer In High Temperature Supercritical CO2 And Helium In A Printed-Circuit Heat Exchanger, Int. J. Heat Mass Transf., 171 (2021), pp. 121089
  18. Bennett, K., Chen, Y. tung, One-Way Coupled Three-Dimensional Fluid-Structure Interaction Analysis Of Zigzag-Channel Supercritical CO2 Printed Circuit Heat Exchangers, Nucl. Eng. Des., 358 (2020), October 2019, pp. 110434
  19. Kim, S.G., et al., CFD Aided Approach To Design Printed Circuit Heat Exchangers For Supercritical CO2 Brayton Cycle Application, Ann. Nucl. Energy, 92 (2016), pp. 175-185
  20. Saeed, M., et al., Numerical Investigation Of Thermal And Hydraulic Characteristics Of SCO2-Water Printed Circuit Heat Exchangers With Zigzag Channels, Energy Convers. Manag., 224 (2020), August, pp. 113375
  21. Ameur, H., et al., Numerical Investigation Of The Performance Of Perforated Baffles In A Plate-Fin Heat Exchanger, Therm. Sci., 25 (2021), 5 Part B, pp. 3629-3641
  22. Menni, Y., et al., Improvement Of The Performance Of Solar Channels By Using Vortex Generators And Hydrogen Fluid, J. Therm. Anal. Calorim., (2020), 0123456789
  23. Karima, A., et al., CFD Investigations Of Thermal And Dynamic Behaviors In A Tubular Heat Exchanger With Butterfly Baffles, Front. Heat Mass Transf., 10 (2018)
  24. Han, Y., et al., A review of development of micro-channel heat exchanger applied in air-conditioning system, Proceedings, Energy Procedia, January 1, 2012, Vol. 14, pp. 148-153
  25. Jiang, P.X., et al., Experimental And Numerical Investigation Of Convection Heat Transfer Of CO2 At Supercritical Pressures In A Vertical Tube At Low Reynolds Numbers, Int. J. Therm. Sci., 47 (2008), 8, pp. 998-1011
  26. Jiang, P.X., et al., Convection Heat Transfer Of CO2 At Supercritical Pressures In A Vertical Mini Tube At Relatively Low Reynolds Numbers, Exp. Therm. Fluid Sci., 32 (2008), 8, pp. 1628-1637
  27. Jiang, P.X., et al., Experimental And Numerical Investigation Of Convection Heat Transfer Of CO2 At Supercritical Pressures In A Vertical Mini-Tube, Int. J. Heat Mass Transf., 51 (2008), 11-12, pp. 3052-3056
  28. Xu, R.N., et al., Experimental Research On The Turbulent Convection Heat Transfer Of Supercritical Pressure CO2 In A Serpentine Vertical Mini Tube, Int. J. Heat Mass Transf., 91 (2015), pp. 552-561
  29. Zhang, Y., et al., Numerical Investigation On Local Heat Transfer Characteristics Of S-CO2 In Horizontal Semicircular Microtube, Appl. Therm. Eng., 154 (2019), pp. 380-392
  30. Lei, X., et al., Experimental Study On Convection Heat Transfer Of Supercritical CO2 In Small Upward Channels, Energy, 176 (2019), pp. 119-130
  31. Cao, F., et al., Theoretical Analysis Of Internal Heat Exchanger In Transcritical CO2 Heat Pump Systems And Its Experimental Verification, Int. J. Refrig., 106 (2019), pp. 506-516
  32. Cao, F., et al., Experimental Investigation On The Influence Of Internal Heat Exchanger In A Transcritical CO2 Heat Pump Water Heater, Appl. Therm. Eng., 168 (2020), pp. 114855
  33. Fang, J., et al., Cooling Performance Enhancement For The Automobile Transcritical CO2 Air Conditioning System With Various Internal Heat Exchanger Effectiveness, Appl. Therm. Eng., 196 (2021), pp. 117274
  34. Hashemian, M., et al., A Comprehensive Numerical Study On Multi-Criteria Design Analyses In A Novel Form (Conical) Of Double Pipe Heat Exchanger, Appl. Therm. Eng., 102 (2016), pp. 1228-1237
  35. Jafarzad, A., Heyhat, M.M., Thermal And Exergy Analysis Of Air- Nanofluid Bubbly Flow In A Double-Pipe Heat Exchanger, Powder Technol., 372 (2020), pp. 563-577
  36. Chen, W., et al., Numerical Investigation Of Heat Transfer And Flow Characteristics Of Supercritical CO2 In U-Duct, Appl. Therm. Eng., 144 (2018), pp. 532-539
  37. Yang, Z., et al., Numerical Study On The Heat Transfer Enhancement Of Supercritical CO2 In Vertical Ribbed Tubes, Appl. Therm. Eng., 145 (2018), pp. 705-715
  38. Zhang, S., et al., Experimental And Numerical Comparison Of The Heat Transfer Behaviors And Buoyancy Effects Of Supercritical CO2 In Various Heating Tubes, Int. J. Heat Mass Transf., 149 (2020)
  39. Wang, H., Kissick, S.M., Modeling And Simulation Of A Supercritical CO2-Liquid Sodium Compact Heat Exchanger For Sodium-Cooled Fast Reactors, Appl. Therm. Eng., 180 (2020), pp. 115859
  40. Aly, W.I.A., Numerical Study On Turbulent Heat Transfer And Pressure Drop Of Nanofluid In Coiled Tube-In-Tube Heat Exchangers, Energy Convers. Manag., 79 (2014), pp. 304-316
  41. Sadighi Dizaji, H., et al., Experimental Studies On Heat Transfer And Pressure Drop Characteristics For New Arrangements Of Corrugated Tubes In A Double Pipe Heat Exchanger, Int. J. Therm. Sci., 96 (2015), pp. 211-220
  42. Sadighi Dizaji, H., et al., The Effect Of Flow, Thermodynamic And Geometrical Characteristics On Exergy Loss In Shell And Coiled Tube Heat Exchangers, Energy, 91 (2015), pp. 678-684
  43. Safikhani, H., Eiamsa-Ard, S., Pareto Based Multi-Objective Optimization Of Turbulent Heat Transfer Flow In Helically Corrugated Tubes, Appl. Therm. Eng., 95 (2016), pp. 275-280
  44. El Maakoul, A., et al., Numerical Investigation Of Thermohydraulic Performance Of Air To Water Double-Pipe Heat Exchanger With Helical Fins, Appl. Therm. Eng., 127 (2017), pp. 127-139
  45. Ali, S.K., et al., Experimental Validation And Numerical Investigation For Optimization And Evaluation Of Heat Transfer Enhancement In Double Coil Heat Exchanger, Therm. Sci. Eng. Prog., 22 (2021), pp. 100862
  46. Manjunath, K., Kaushik, S.C., Second Law Thermodynamic Study Of Heat Exchangers: A Review, Renew. Sustain. Energy Rev., 40 (2014), pp. 348-374
  47. Joppolo, C.M., et al., Numerical Analysis Of The Influence Of Circuit Arrangement On A Fin-And-Tube Condenser Performance, Case Stud. Therm. Eng., 6 (2015), pp. 136-146
  48. Yang, D., et al., An Experimental And Numerical Study Of Helix Tube Gas Cooler For Super-Critical Carbon Dioxide, J. Chem. Eng. Japan, 50 (2017), 12, pp. 900-908
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A comprehensive numerical study of energy efficiency analysis of a double pipe gas cooler based on second law analysis

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence