Condensation Heat Transfer Characteristics of R22, R134a, R410A and R407C on Single Horizontal Plain and Finned Tubes


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Abstract


This paper presents experimental results of the condensation heat transfer characteristics for pure refrigerants R22 and R134a, binary refrigerant R410A and non-azeotropic mixture R407C on single horizontal smooth and finned tubes. The experiments were conducted at saturated temperature (35 oC and 40 oC), inlet coolant temperature (25 oC and 30 oC) and coolant mass flow rate (100 - 800 kg/h) resulting refrigerant mass flux of 20 – 400 kg/m2s for smooth and finned tubes. For finned tubes, the pitch to height ratio varies from 0.5 to 3.08. Experimental results confirmed that the heat flux and the overall heat transfer coefficient for R22, R134a, R410A and R407C increase when coolant mass flow rate, saturation temperature and fin height increase or as both coolant inlet temperature and fin pitch decrease.  The heat flux and the overall heat transfer coefficient for R410A were correlated with the investigated parameters. Comparison among four refrigerants; R410A provides better condensation heat transfer characteristics and it yields higher condensation heat transfer coefficients than those of other refrigerants by 8 to 27%. However, the condensation heat transfer coefficients of R407C are much lower than those of other refrigerants for all investigated parameters. As a replacement of R22, R410A has more advantages than R407C in view of condensation heat transfer characteristics
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Keywords


Condensation Heat Transfer; Smooth and Finned Tubes; R22; R134a; R410; R407C

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References


R. Downing, Development of Chlorofluorocarbon Refrigerants: CFCs-Time of Transition, American Society of Heating, Refrigerating and Air Conditioning Engineers, Atlanta, Georgia, USA, pp. 16-22, 1989.

P. C. Koelet, Industrial Refrigeration: Principle, Design and Applications (Marcel Dekker Inc., Hong Kong, 1992).

K. Park, D. Jung, Condensation Heat Transfer Coefficients of HCFC22, R410A, R407C and HFC134a at Various Temperatures on a Plain Horizontal Tube, Journal of Mechanical Science and Technology, Vol. 21, pp. 804~813, 2007.
http://dx.doi.org/10.1007/bf02916359

ASHRAE, Fundamental Handbook, American Society of Heating, Refrigerating and Air Conditioning Engineers, Atlanta, Georgia, USA, 2001.

W. Chen, A comparative Study on the Performance and Environmental Characteristics of R410A and R22 Residential Air Conditioners, Applied Thermal Engineering, Vol. 28, pp. 1-7, 2008.
http://dx.doi.org/10.1016/j.applthermaleng.2007.07.018

S. N. Sapali, K. C. Gaikwad, P.W. Deshmukh, Condensation of R-134a in a Multi Flow Channel Aluminum Flat Tube Condenser with Micro-Fins, (2007) International Review of Mechanical Engineering (IREME), 1 (6), pp. 715 – 720.

N. Berrada, Ch. Marvillet, A. Bontemps, S. Daoudi, Heat Transfer in-Tube Condensation of a Zeotropic Mixture of HFC23/HFC134a in a Horizontal Smooth Tube, International Journal of Refrigeration, Vol. 19, pp. 463-472, 1996.
http://dx.doi.org/10.1016/s0140-7007(96)00005-9

D. W. Shao, E. Granryd, Experimental and Theoretical Study on Flow Condensation with Non-Azeotropic Refrigerant Mixtures of R32/R134a", International Journal of Refrigeration, Vol. 21 issue 3 May, pp. 230-246, 1998.
http://dx.doi.org/10.1016/s0140-7007(98)00015-2

R. Bassi, P. K. Bansal, In-Tube Condensation of Mixture of R134a and Ester Oil-Empirical Correlations, International Journal of Refrigeration, Vol. 26, pp. 402-409, 2003.
http://dx.doi.org/10.1016/s0140-7007(02)00152-4

W. Xiaoyong, F. Xiande, S. Rongrong, A Comparative Study of Heat Transfer Coefficients for Film Condensation, Energy Science and Technology, Vol. 3, n. 1, pp. 1-9, 2012.

H. S. Wang, H. Honda, Condensation of Refrigerants in Horizontal Micro Fin Tubes: Comparison of Prediction Methods for Heat Transfer, International Journal of Refrigeration, pp. 26 452-460, 2003.
http://dx.doi.org/10.1016/s0140-7007(02)00158-5

A. Cavallini, G. Censi, D. Del Col, L. Doretti, G.A. Longo,L. Rossetto, Experimental Investigation on Condensation Heat Transfer and Pressure Drop of New HFC Refrigerants (R134a, R125, R32, R410A and R236ea) in a Horizontal Smooth Tube, International Journal of Refrigeration, Vol. 24, pp. 73-87, 2001.
http://dx.doi.org/10.1016/s0140-7007(00)00070-0

D. Jung, C. Kim, S. Hwang, K. Kim, Condensation Heat Transfer Coefficients of R22, R407C, and R410A on a Horizontal Plain, Low Fin, and Turbo-C Tubes, International Journal of Refrigeration, Vol. 26, pp. 485–491, 2003
http://dx.doi.org/10.1016/s0140-7007(02)00161-5

A. S. Dalkilic, S. Wongwises, Intensive Literature Review of Condensation Inside Smooth and Enhanced Tubes, International Journal of Heat and Mass Transfer, Vol. 52, pp. 3409–3426, 2009.
http://dx.doi.org/10.1016/j.ijheatmasstransfer.2009.01.011

D. Jung, Youngmok, Kihopark, Flow Condensation Heat Transfer Coefficient of R22, R134a, R407C, and R410A Inside Plain and Micro-Fin Tubes, International Journal of Refrigeration, pp. 27 25-32, 2004.
http://dx.doi.org/10.1016/s0140-7007(03)00122-1

H. Zhang, J. Li, N. Liu, B. Wang, Experimental Investigation of Condensation Heat Transfer and Pressure Drop of R22, R410A and R407C in Mini-Tubes, International Journal of Heat and Mass Transfer, Vol. 55, pp. 3522–3532, 2012.
http://dx.doi.org/10.1016/j.ijheatmasstransfer.2012.03.012

D. Jung, Ch-B. Kim, S. Cho, K. Song, Condensation Heat Transfer Coefficient of Enhanced Tubes with Alternative Refrigerants for CFC11 and CFC12, International Journal of Refrigeration, Vol. 22, pp. 548-557, 1999.
http://dx.doi.org/10.1016/s0140-7007(99)00020-1

R. Kumar, H.K. Varma, B. Mohanty, K.N. Agrawal, Prediction of Heat Transfer Coefficient during Condensation of Water and R134a on Single Horizontal Integral-Fin Tubes, International Journal of Refrigeration, Vol. 25, pp. 111-126, 2002.
http://dx.doi.org/10.1016/s0140-7007(00)00094-3

R. Kumar, A. Gupta, S. Vishvakarma, Condensation of R-134a Vapor over Single Horizontal Integral-Fin Tubes: Effect of Fin Height, International Journal of Refrigeration, Vol. 28, pp. 428-435, 2005.
http://dx.doi.org/10.1016/j.ijrefrig.2004.04.007

F. P. Incropera, P. DeWitt, Fundamentals of heat and mass transfer (John Willy & Sons, New York, USA, 2003).

R. Moffat, Describing the Uncertainties in Experimental Results, Experimental Thermal and Fluid Science, Elsevier Science Pub. Co. Inc., New York, USA, 1988.
http://dx.doi.org/10.1016/0894-1777(88)90043-x

S. J. Kline, F. A. McClintock, Describing Uncertainties in Single-sample Experiments, Mechanical Engineers, Vol. 75, January, pp. 3–9, 1953.

W, Y. Cheng, C. C. Wang, Condensation of R134a on Enhanced Tubes, ASHRAE Transaction, Vol. 100, pp. 809-817, 1994.


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