The heat transfer of supercritical fluids is a vastly growing field, specifically to find suitable alternatives to replace conventional R134a, which can be beneficial for climate change. Most of the experimental and numerical investigations have been conducted to explore supercritical water, carbon dioxide and R134a as heat transfer working fluids. Hydrofluoroolefin (HFO) and refrigerants blends have been considered the most environment-friendly refrigerants to replace Chlorofluorocarbons (CFCs), Hydrochlorofluoro-carbons (HCFCs) and Hydrofluorocarbons (HFCs). Their main advantage of zero Ozone Depletion Potential (ODP) and comparatively lower Global Warming Potential (GWP) have attracted growing amount of attention to mitigate environmental issues. This work adopts the computational method and takes the environmentally friendly refrigerants to investigate the heat transfer characteristics under widely used shear-stress transport (SST) model. A comprehensive comparison was performed at reduced pressure of 1.10 for supercritical fluids R515A, R1234ze(E) and R134a. The peaks of heat transfer coefficient occurred in the vicinity of pseudo critical temperature for all of these considered fluids; however, R134a resulted in higher heat transfer coefficient, Reynolds number and Prandtl number in comparison with R515A and R1234ze(E). The higher heat transfer coefficient of supercritical fluid R134a is owing to its thermophysical properties and the specific heat plays crucial role in the heat transfer of supercritical fluids. Owing to environmental issues, R515A can be a considerable replacement of R134a. R1234ze(E) is also promising alternative to R134a; however, safety issues should thoroughly concern its mild flammable characteristics.
Jiang, Y.-R., Hu, P. and Ibrahim, A. (2020) Experimental and Numerical Investigation on Heat Transfer Characteristics of Supercritical R1234ze (E) Cooled in Horizontal Tubes. International Journal of Heat and Fluid Flow, 85, Article ID: 108650. https://doi.org/10.1016/j.ijheatfluidflow.2020.108650
Zhang, G.-W., Hu, P., Chen, L.-X. and Liu, M.-H. (2018) Experimental and Simulation Investigation on Heat Transfer Characteristics of in-Tube Supercritical CO2 Cooling Flow. Applied Thermal Engineering, 143, 1101-1113. https://doi.org/10.1016/j.applthermaleng.2018.07.108
Ibrahim, A., Peng, H., Riaz, A., Basit, M.A., Rashid, U. and Basit, A. (2021) Molten Salts in the Light of Corrosion Mitigation Strategies and Embedded with Nanoparticles to Enhance the Thermophysical Properties for CSP Plants. Solar Energy Materials and Solar Cells, 219, Article ID: 110768. https://doi.org/10.1016/j.solmat.2020.110768
Tian, R., Wang, D., Zhang, Y., Ma, Y., Li, H. and Shi, L. (2019) Experimental Study of the Heat Transfer Characteristics of Supercritical Pressure R134a in a Horizontal Tube. Experimental Thermal and Fluid Science, 100, 49-61. https://doi.org/10.1016/j.expthermflusci.2018.08.027
Mishra, S., Nayak, M. and Misra, A. (2020) Thermal Conductivity of Nanofluids—A Comprehensive Review. International Journal of Thermofluid Science and Technology, 7, Article ID: 070301. https://doi.org/10.36963/IJTST.2020070301
Zhou, Y., Zhang, L., Bu, S., Sun, C., Xu, W., Xiao, Y. and Liu, L. (2020) Study on Heat Transfer Characteristics of the Whole Plate Fin Tube Cooler. International Journal of Thermofluid Science and Technology.
Islam, T., Parveen, N. and Asad, M. (2020) Hydromagnetic Natural Convection Heat Transfer of Copper-Water Nanofluid within a Right-Angled Triangular Cavity. International Journal of Thermofluid Science and Technology, 7, Article ID: 070304. https://doi.org/10.36963/IJTST.2020070304
Marques, S.P. and Campo, A. (2019) Finite Strip Method Applied to Steady Heat Conduction and Thermal Radiation in a Planar Slab: Absorbing-Emitting Gray Material and Parallel Diffuse Surfaces. International Journal of Thermofluid Science and Technology, 6, Article ID: 19060102.
Cui, Y., Wang, H. and Wang, Y. (2019) Experimental and Numerical Studies on Convective Heat Transfer of Supercritical R-134a in a Horizontal Tube. International Journal of Heat and Mass Transfer, 136, 34-45. https://doi.org/10.1016/j.ijheatmasstransfer.2019.02.083
Wang, D., Tian, R., Zhang, Y., Li, L., Ma, Y., Shi, L. and Li, H. (2019) Heat Transfer Investigation of Supercritical R134a for Trans-Critical Organic Rankine Cycle System. Energy, 169, 542-557. https://doi.org/10.1016/j.energy.2018.12.034
Ye, K., Zhang, Y., Yang, L., Zhao, Y., Li, N. and Xie, C. (2019) Modeling Convective Heat Transfer of Supercritical Carbon Dioxide Using an Artificial Neural Network. Applied Thermal Engineering, 150, 686-695. https://doi.org/10.1016/j.applthermaleng.2018.11.031
Ehsan, M.M., Guan, Z. and Klimenko, A. (2018) A Comprehensive Review on Heat Transfer and Pressure Drop Characteristics and Correlations with Supercritical CO2 under Heating and Cooling Applications. Renewable and Sustainable Energy Reviews, 92, 658-675. https://doi.org/10.1016/j.rser.2018.04.106
Huang, D., Wu, Z., Sunden, B. and Li, W. (2016) A Brief Review on Convection Heat Transfer of Fluids at Supercritical Pressures in Tubes and the Recent Progress. Applied Energy, 162, 494-505. https://doi.org/10.1016/j.apenergy.2015.10.080
Wang, H., Leung, L.K., Wang, W. and Bi, Q. (2018) A Review on Recent Heat Transfer Studies to Supercritical Pressure Water in Channels. Applied Thermal Engineering, 142, 573-596. https://doi.org/10.1016/j.applthermaleng.2018.07.007
Rahman, M.M., Dongxu, J., Beni, M.S., Hei, H.C., He, W. and Zhao, J. (2016) Supercritical Water Heat Transfer for Nuclear Reactor Applications: A Review. Annals of Nuclear Energy, 97, 53-65. https://doi.org/10.1016/j.anucene.2016.06.022
Zhang, S., Xu, X., Liu, C. and Dang, C. (2020) A Review on Application and Heat Transfer Enhancement of Supercritical CO2 in Low-Grade Heat Conversion. Applied Energy, 269, Article ID: 114962. https://doi.org/10.1016/j.apenergy.2020.114962
Knez, Ž., Markočič, E., Leitgeb, M., Primožič, M., Hrnčič, M.K. and Škerget, M. (2014) Industrial Applications of Supercritical Fluids: A Review. Energy, 77, 235-243. https://doi.org/10.1016/j.energy.2014.07.044
Huang, D. and Li, W. (2018) A Brief Review on the Buoyancy Criteria for Supercritical Fluids. Applied Thermal Engineering, 131, 977-987. https://doi.org/10.1016/j.applthermaleng.2017.12.042
Dang, C. ad Hihara, E. (2004) In-Tube Cooling Heat Transfer of Supercritical Carbon Dioxide. Part 1. Experimental Measurement. International Journal of Refrigeration, 27, 736-747. https://doi.org/10.1016/j.ijrefrig.2004.04.018
Dang, C. and Hihara, E. (2004) In-Tube Cooling Heat Transfer of Supercritical Carbon Dioxide. Part 2. Comparison of Numerical Calculation with Different Turbulence Models. International Journal of Refrigeration, 27, 748-760. https://doi.org/10.1016/j.ijrefrig.2004.04.017
Wang, J., Guan, Z., Gurgenci, H., Hooman, K., Veeraragavan, A. and Kang, X. (2018) Computational Investigations of Heat Transfer to Supercritical CO2 in a Large Horizontal Tube. Energy Conversion and Management, 157, 536-548. https://doi.org/10.1016/j.enconman.2017.12.046
Zahlan, H., Groeneveld, D. and Tavoularis, S. (2015) Measurements of Convective Heat Transfer to Vertical Upward Flows of CO2 in Circular Tubes at Near-Critical and Supercritical Pressures. Nuclear Engineering and Design, 289, 92-107. https://doi.org/10.1016/j.nucengdes.2015.04.013
Zhao, C.-R. and Jiang, P.-X. (2011) Experimental Study of In-Tube Cooling Heat Transfer and Pressure Drop Characteristics of R134a at Supercritical Pressures. Experimental Thermal and Fluid Science, 35, 1293-1303. https://doi.org/10.1016/j.expthermflusci.2011.04.017
Wang, D., Tian, R., Zhang, Y., Li, L. and Shi, L. (2019) Experimental Comparison of the Heat Transfer of Supercritical R134a in a Micro-Fin Tube and a Smooth Tube. International Journal of Heat and Mass Transfer, 129, 1194-1205. https://doi.org/10.1016/j.ijheatmasstransfer.2018.10.052
Wang, D., Tian, R., Li, L., Dai, X. and Shi, L. (2020) Heat Transfer of R134a in a Horizontal Internally Ribbed Tube and in a Smooth Tube under Super Critical Pressure. Applied Thermal Engineering, 173, Article ID: 115208. https://doi.org/10.1016/j.applthermaleng.2020.115208
Kang, K.-H. and Chang, S.-H. (2009) Experimental Study on the Heat Transfer Characteristics during the Pressure Transients under Supercritical Pressures. International Journal of Heat and Mass Transfer, 52, 4946-4955. https://doi.org/10.1016/j.ijheatmasstransfer.2009.06.005
Cui, Y.-L. and Wang, H.-X. (2018) Experimental Study on Convection Heat Transfer of R134a at Supercritical Pressures in a Vertical Tube for Upward and Downward Flows. Applied Thermal Engineering, 129, 1414-1425. https://doi.org/10.1016/j.applthermaleng.2017.10.120
He, J., Dang, C. and Hihara, E. (2018) Experimental Investigation of Heat Transfer to Supercritical R245fa Flowing Vertically Upward in a Circular Tube. International Journal of Heat and Mass Transfer, 127, 286-295. https://doi.org/10.1016/j.ijheatmasstransfer.2018.06.126
He, J., Dang, C. and Hihara, E. (2018) Supercritical Heat Transfer Characteristics of R1233zd(E) in Vertically Upward Flow. International Journal of Heat and Mass Transfer, 127, 497-505. https://doi.org/10.1016/j.ijheatmasstransfer.2018.07.078
Jiang, P.-X., Zhao, C.-R. and Liu, B. (2012) Flow and Heat Transfer Characteristics of r22 and Ethanol at Supercritical Pressures. The Journal of Supercritical Fluids, 70, 75-89. https://doi.org/10.1016/j.supflu.2012.06.011
Xiong, Z., Gu, H., Zhang, S. and Chen, J. (2017) Effect of Intermittent Heating on the Heat Transfer Performance of Supercritical R134a Flowing in a Pipe. Experimental Thermal and Fluid Science, 88, 434-443. https://doi.org/10.1016/j.expthermflusci.2017.06.014
Liu, X., Xu, X., Liu, C., Ye, J., Li, H., Bai, W. and Dang, C. (2017) 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. Applied Thermal Engineering, 116, 500-515. https://doi.org/10.1016/j.applthermaleng.2017.01.103
Zhang, S., Xu, X., Liu, C., Liu, X., Ru, Z. and Dang, C. (2020) Experimental and Numerical Comparison of the Heat Transfer Behaviors and Buoyancy Effects of Supercritical CO2 in Various Heating Tubes. International Journal of Heat and Mass Transfer, 149, Article ID: 119074. https://doi.org/10.1016/j.ijheatmasstransfer.2019.119074
Wang, K.-Z., Xu, X.-X., Liu, C., Bai, W.-J. and Dang, C.-B. (2017) Experimental and Numerical Investigation on Heat Transfer Characteristics of Supercritical CO2 in the Cooled Helically Coiled Tube. International Journal of Heat and Mass Transfer, 108, 1645-1655. https://doi.org/10.1016/j.ijheatmasstransfer.2017.01.004
Xiang, M., Guo, J., Huai, X. and Cui, X. (2017) Thermal Analysis of Supercritical Pressure CO2 in Horizontal Tubes under Cooling Condition. The Journal of Supercritical Fluids, 130, 389-398. https://doi.org/10.1016/j.supflu.2017.04.009
Wang, K., Xu, X., Wu, Y., Liu, C. and Dang, C. (2015) Numerical Investigation on Heat Transfer of Supercritical CO2 in Heated Helically Coiled Tubes. The Journal of Supercritical Fluids, 99, 112-120. https://doi.org/10.1016/j.supflu.2015.02.001
Palko, D. and Anglart, H. (2008) Theoretical and Numerical Study of Heat Transfer Deterioration in High Performance Light Water Reactor. Science and Technology of Nuclear Installations, 2008, Article ID: 405072. https://doi.org/10.1155/2008/405072
Liu, L., Xiao, Z., Yan, X., Zeng, X. and Huang, Y. (2013) Heat Transfer Deterioration to Supercritical Water in Circular Tube and Annular Channel. Nuclear Engineering and Design, 255, 97-104. https://doi.org/10.1016/j.nucengdes.2012.09.025
Wen, Q. and Gu, H. (2011) Numerical Investigation of Acceleration Effect on Heat Transfer Deterioration Phenomenon in Supercritical Water. Progress in Nuclear Energy, 53, 480-486. https://doi.org/10.1016/j.pnucene.2011.02.012
Podila, K. and Rao, Y. (2015) CFD Analysis of Flow and Heat Transfer in Canadian Supercritical Water Reactor Bundle. Annals of Nuclear Energy, 75, 1-10. https://doi.org/10.1016/j.anucene.2014.07.039
Zhao, H., Li, X. and Wu, X. (2017) Numerical Investigation of Supercritical Water Turbulent Flow and Heat Transfer Characteristics in Vertical Helical Tubes. The Journal of Supercritical Fluids, 127, 48-61. https://doi.org/10.1016/j.supflu.2017.03.016
Jaromin, M. and Anglart, H. (2013) A Numerical Study of Heat Transfer to Supercritical Water Flowing Upward in Vertical Tubes under Normal and Deteriorated Conditions. Nuclear Engineering and Design, 264, 61-70. https://doi.org/10.1016/j.nucengdes.2012.10.028
Han, C.-L., Zhang, Y.-N., Yu, H., Lu, Y.-P. and Jiao, B. (2018) Numerical Analysis on Non-Uniform Flow and Heat Transfer of Supercritical Cryogenic Methane in a Heated Horizontal Circular Tube. The Journal of Supercritical Fluids, 138, 82-91. https://doi.org/10.1016/j.supflu.2018.04.007
Zhang, P., Huang, Y., Shen, B. and Wang, R.Z. (2011) Flow and Heat Transfer Characteristics of Supercritical Nitrogen in a Vertical Mini-Tube. International Journal of Thermal Sciences, 50, 287-295. https://doi.org/10.1016/j.ijthermalsci.2010.06.014
Xiao, Y., Pan, J. and Gu, H. (2018) Numerical Investigation of Spacer Effects on Heat Transfer of Supercritical Fluid Flow in an Annular Channel. International Journal of Heat and Mass Transfer, 121, 343-353. https://doi.org/10.1016/j.ijheatmasstransfer.2018.01.030
Yang, Z., Cheng, X., Zheng, X. and Chen, H. (2019) Numerical Investigation on Heat Transfer of the Supercritical Fluid Upward in Vertical Tube with Constant Wall Temperature. International Journal of Heat and Mass Transfer, 128, 875-884. https://doi.org/10.1016/j.ijheatmasstransfer.2018.09.049
Kedzierski, M. and Lin, L. (2020) Pool Boiling of R515A, R1234ze(E), and R1233zd(E) on a Reentrant Cavity Surface. International Journal of Heat and Mass Transfer, 161, Article ID: 120252. https://doi.org/10.1016/j.ijheatmasstransfer.2020.120252
Petersen, M., Pottker, G., Sethi, A. and Yana Motta, S.F. (2018) Refrigerants with Low Environmental Impact for Commercial Refrigeration Systems. International Refrigeration and Air Conditioning Conference. https://docs.lib.purdue.edu/iracc/1882
Saengsikhiao, P., Taweekun, J., Maliwan, K., Sae-ung, S. and Theppaya, T. (2020) Investigation and Analysis of R463A as an Alternative Refrigerant to R404A with Lower Global Warming Potential. Energies, 13, 1514. https://doi.org/10.3390/en13061514
Tian, R., Xu, Y., Shi, L., Song, P. and Wei, M. (2020) Mixed Convection Heat Transfer of Supercritical Pressure R1234yf in Horizontal Flow: Comparison Study as Alternative to R134a in Organic Rankine Cycles. Energy, 205, 118061. https://doi.org/10.1016/j.energy.2020.118061
Longo, G.A., Mancin, S., Righetti, G. and Zilio, C. (2019) R1234yf and R1234ze(E) as Environmentally Friendly Replacements of R134a: Assessing Flow Boiling on an Experimental Basis. International Journal of Refrigeration, 108, 336-346. https://doi.org/10.1016/j.ijrefrig.2019.09.008
Jemaa, R.B., Mansouri, R., Boukholda, I. and Bellagi, A. (2017) Energy and Exergy Investigation of R1234ze as R134a Replacement in Vapor Compression Chillers. International Journal of Hydrogen Energy, 42, 12877-12887. https://doi.org/10.1016/j.ijhydene.2016.12.010
Mota-Babiloni, A., Navarro-Esbrí, J., Molés, F., Cervera, á.B., Peris, B. and Verdú, G. (2016) A Review of Refrigerant R1234ze(E) Recent Investigations. Applied Thermal Engineering, 95, 211-222. https://doi.org/10.1016/j.applthermaleng.2015.09.055
Li, J., Liu, Q., Ge, Z., Duan, Y. and Yang, Z. (2017) Thermodynamic Performance Analyses and Optimization of Subcritical and Transcritical Organic Rankine Cycles Using R1234ze(E) for 100-200°C Heat Sources. Energy Conversion and Management, 149, 140-154. https://doi.org/10.1016/j.enconman.2017.06.060
Yataganbaba, A., Kilicarslan, A. and Kurtbaş, İ. (2015) Exergy Analysis of R1234yf and R1234ze as R134a Replacements in a Two Evaporator Vapour Compression Refrigeration System. International Journal of Refrigeration, 60, 26-37. https://doi.org/10.1016/j.ijrefrig.2015.08.010
Janković, Z., Atienza, J.S. and Suárez, J.A.M. (2015) Thermodynamic and Heat Transfer Analyses for R1234yf and R1234ze (E) as Drop-in Replacements for R134a in a Small Power Refrigerating System. Applied Thermal Engineering, 80, 42-54. https://doi.org/10.1016/j.applthermaleng.2015.01.041