Condensation Heat Transfer Characteristics of R-1234yf with the Variation of Tube Diameter

Sung-Hoon Seol; Jung-In Yoon; Joon-Hyuk Lee; Seung-Yun Cha; Su-Jeong Ha

doi:10.7836/kses.2021.41.4.161

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2021 Vol.41, Issue 4 Preview Page Next Page

Research Article

Condensation Heat Transfer Characteristics of R-1234yf with the Variation of Tube Diameter R-1234yf의 관경 변화에 따른 응축 열전달 특성

30 August 2021. pp. 161-171

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Abstract

In this study, the condensation heat transfer characteristics of the R-1234yf refrigerant were analyzed according to the variation in tube diameter, which were then considered as condenser design data. The inner diameter of the experimental tube was varied from 3.7 mm to 5.3 mm. Subsequently, the heat transfer coefficient of R-1234yf was analyzed according to the changes in vapor quality, mass flux, saturation temperature, and pipe diameter. Slug flow was observed at a low mass flux, and annular flow was observed at a high mass flux. Furthermore, it was observed that the heat transfer coefficient’s value increased with increase in the vapor quality and mass flux, whereas it decreased with increase in the tube diameter and saturation temperature. By comparing the heat transfer coefficients of the refrigerants R-134a and R-1234yf, it was found that the heat transfer coefficient of R-134a is higher. Furthermore, four correlations were conducted, and it was found that the correlation of Dobson and Chato and the correlation of Bashar can predict the experimental condensation heat transfer coefficient within an error range of ±10%.

Keywords

Condensation heat transfer coefficient

Flow pattern

Variation of tube diameter

R-1234yf

키워드

응축 열전달계수

유동양식

관경 변화

R-1234yf

References

Yoo, H. K. and Jung, D. S., Computer Simulation Study for Analyzing Alternative Refrigerants in Residential Air-conditioners, Journal of the Korean Solar Energy Society, Vol. 15, No. 3, pp. 75-90, 1995.

Park, K. J., Lee, Y., Choe, D. S., and Jung, D. S., Performance of R1234yf and R1234yf/R134a Mixture under Mobile Air-conditioner Operating Conditions, Journal of Air-Conditioning and Refrigeration Engineerin, Vol. 22, No. 12, pp. 837-844, 2010.

Jetter, J. J., Smith, N. D., Ratanaphruks, K., Ng, A. S., and Tufts, M. W., Evaluation of Alternatives for HFC-134a Refrigerant in Motor Vehicle Air Conditioning, Proceedings of the International Conference on Ozone Protection Technologies, Washington, D. C., USA, pp. 845-854, 1997. 10.4271/970525

Nielsen, O. J., Javadi, M. S., Sulbaek Andersen, M. P., Hurley, M. D., Wallington, T. J., and Singh, R., Atmospheric chemistry of CF3CFCH2: Kinetics and mechanisms of gas-phase reactions with Cl atoms, OH radicals, and O3, Chemical Physics Letters, Vol. 439, No. 1-3, pp. 18-22, 2007. 10.1016/j.cplett.2007.03.053

Del Col, D., Torresin, C. D., and Cavallini, A., Heat Transfer and Pressure Drop During Condensation of the Low GWP Refrigerant HFO1234yf, International Journal of Refrigeration, Vol. 33, No. 7, pp. 1307-1318, 2010. 10.1016/j.ijrefrig.2010.07.020

Wang, L., Dang, C., and Hihara, E., Experimental Study on Condensation Heat Transfer and Pressure Drop of Low GWP Refrigerant HFO1234yf in a Horizontal Tube, International Journal of Refrigeration, Vol. 35, pp. 1418-1429, 2012. 10.1016/j.ijrefrig.2012.04.006

Illan-Gomez, F., Lopez-Belchı, A., Garcıa-Cascales, J. R., and Vera-Garcıa, F., Experimental Two-Phase Heat Transfer Coefficient and Frictional Pressure Drop Inside Mini-channels During Condensation with R1234yf and R134a, International Journal of Refrigeration, Vol. 51, pp. 12-23, 2015. 10.1016/j.ijrefrig.2014.11.014

Longo, G. A., Mancin, S., Righetti, G., and Zilio, C., Saturated Vapour Condensation of R134a Inside a 4 mm ID Horizontal Smooth Tube: Comparison with the Low GWP Substitutes R152a, R1234yf and R1234ze(E), International Journal of Heat and Mass Transfer, Vol. 133, pp. 461-473, 2019. 10.1016/j.ijheatmasstransfer.2018.12.115

Bashar, M. K., Nakamura, K., Kariya, K., and Miyara, A., Condensation Heat Transfer of R1234yf in a Small Diameter Smooth and Microfin Tube and Development of Correlation, International Journal of Refrigeration, Vol. 120, pp. 331-339, 2020. 10.1016/j.ijrefrig.2020.09.002

Kline, S. J. and McClintock, F. A., Describing Uncertainties in Single Sample Experiments, Mechanical Engineering, Vol. 75, No. 1, pp. 3-12, 1953.

Yang, C. Y. and Shieh, C. C., Flow Pattern of Air-water and Two-phase R-134a in Small Circular Tubes, International Journal of Multiphase Flow, Vol. 27, No. 7, pp. 1163-1177, 2001. 10.1016/S0301-9322(00)00070-7

Lee, S. W., Condensation Heat Transfer and Pressure Drop of HFO-1234yf in 4 mm Horizontal Tube, Thesis for the Degree of Master, Department of Refrigeration and Air Conditioning Engineering, The Graduate School, Pukyong National University, 2021.

Cavallini, A., Censi, G., Del Col, D., Doretti, L., Longo, G. A., and Rossetto, L., Experimental Investigation on Condensation Heat Transfer and Pressure Drop of New HFC Refrigerants (R134a, R125, R32, R410A, R236ea) in a Horizontal Smooth Tube, International Journal of Refrigeration. Vol. 24, pp. 73-87, 2001. 10.1016/S0140-7007(00)00070-0

Son, C. H. and Lee, H. S., Condensation Heat Transfer Characteristics of R-22, R-134a and R-410A in Small Diameter Tubes, Heat Mass Transfer, Vol. 45, pp. 1153-1166, 2009. 10.1007/s00231-009-0489-6

Dobson, M. K. and Chato, J. C., Condensation in Smooth Horizontal Tubes, Jornal of Heat Transfer, Vol. 120, No. 1, pp. 193-213, 1998. 10.1115/1.2830043

Shah,M.M., Chart Correlation for Saturated Boiling Heat Transfer Equations and Further Study, ASHRAE Transactions, Vol.88, pp. 185-196, 1982.

Bashar, M. K., Nakamura, K., Kariya, K., and Miyara, A., Development of a Correlation for Pressure Drop of Two-Phase Flow Inside Horizontal Small Diameter Smooth and Microfin Tubes, International Journal of Refrigeration, Vol. 11, pp. 80-91, 2020. 10.1016/j.ijrefrig.2020.08.013

Patel, T., Parekh, A. D., and Tailor, P. R., Experimental Analysis of Condensation Heat Transfer and Frictional Pressure Drop in a Horizontal Circular Mini Channel, Heat Mass Transfer, Vol. 56, pp. 1579-1600, 2020. 10.1007/s00231-019-02798-5

Information

Publisher :Korean Solar Energy Society
Publisher(Ko) :한국태양에너지학회
Journal Title :Journal of the Korean Solar Energy Society
Journal Title(Ko) :한국태양에너지학회 논문집
Volume : 41
No :4
Pages :161-171
Received Date : 2021-07-22
Accepted Date : 2021-08-15
DOI :https://doi.org/10.7836/kses.2021.41.4.161

Journal of the Korean Solar Energy Society ISSN:1598-6411(Print) 2508-3562(Online) 한국태양에너지학회 논문집

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