Browse > Article
http://dx.doi.org/10.5916/jkosme.2008.32.4.542

Evaporation Heat Transfer and Pressure Drop of Mixture Refrigerant R-407C  

Roh, Geon-Sang (동명대학교 냉동공조공학과)
Oh, Hoo-Kyu (부경대학교 기계공학부 냉동공조공학과)
Son, Chang-Hyo (부경대학교 기계공학부)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.32, no.4, 2008 , pp. 542-549 More about this Journal
Abstract
The evaporation heat transfer coefficient and pressure drop of R-22 and R-407C in a horizontal copper tube were investigated experimentally. The main components of the refrigerant loop are a receiver, a compressor, a mass flow meter, a condenser and a double pipe type evaporator (test section). The test section consists of a smooth copper tube of 6.4 mm inner diameter. The refrigerant mass fluxes were varied from 100 to $300\;kg/m^2s$ and the saturation temperature of evaporator were $5^{\circ}C$. The evaporation heat transfer coefficients of R-22 and R-407C increase with the increase of mass flux and vapor quality. The evaporation heat transfer coefficients of R-22 is about $5.68{\times}46.6%$ higher than that of R-407C. The evaporation pressure drop of R-22 and R-407C increase with the increase of mass flux. The pressure drop of R-22 is similar to that of R-407C. In comparison with test results and existing correlations, correlations failed to predict the evaporation heat transfer coefficient of R-22 and R-407C. therefore, it is necessary to develope reliable and accurate predictions determining the evaporation heat transfer coefficient of R-22 and R-407C in a horizontal tube.
Keywords
Evaporator; Heat transfer coefficient; Mixture refrigerant; Pressure drop;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 C. Aprea, A. Greco and A. Rosato, 'Comparison of R407C and R417A heat transfer coefficients and pressure drops during flow boiling in a horizontal smooth tube', Energy Conversion and Management, In Press, Corrected Proof, Available online 22 January 2008
2 S. J. Kline and F. A. McClintock, 'Describing Uncertainties in Single Sample Experiments', Mechanical Engineering, Vol. 75, No. 1, pp. 3-12, 1953
3 M. O. McLinden, S. A. Klein, E. W. Lemmon, and A. P. Peskin,'NIST Thermodynamic Properties and Refrigerant Mixtures Database (REFPROP)', Version 6.01, National Institute of Standards and Technology, Gaithersburg, MD, U.S.A., 1998
4 Y. Taitel and A. E. Dukler,'A model for predicting flow regime transitions in horizontal and near horizontal gas-liquid flow', AIChE J, Vol. 22, pp. 47-55, 1976   DOI   ScienceOn
5 D. S. Jung, M. McLinden, R. Radermacher and D. Didion, A study of flow boiling heat transfer with refrigerant mixtures, Int. J. of Heat and Mass Transfer, Vol. 32, pp. 1751-1764, 1989   DOI   ScienceOn
6 E. A. Vineyard and J. K. Sand,'Evaluation of nonazeotropic refrigerant mixtures for capacity modulation', DOE/ORNL Heat Pump Conference Proceeding, pp. 47-54, 1998
7 W. Targanski and J. Cieslinski, 'Evaporation of R407C/oil mixtures inside corrugated and micro-fin tubes', Applied Thermal Engineering, Vol. 27, No. 13, pp. 2226-2232, 2007   DOI   ScienceOn
8 S. G. Kandlikar, A general correlation for saturated two-phase flow boiling heat transfer inside horizontal and vertical tubes, J. of Heat Transfer, Vol. 112, pp. 219-228, 1989   DOI
9 K. E. Gungor and R. H. S. Winterton, Simplified general correlation for saturated flow boiling and comparison with data, Chem. Eng. Res. Dev., Vol. 65, pp. 148-156, 1987
10 J. U. Han, S. J. Kim, D. S. Jung and Y. I. Kim, Flow boiling heat transfer characteristics of R22 alternative refrigerants in a horizontal smooth tube, Int. J. of Air-Conditioning and Refrigeration, Vol. 13, No. 4, pp. 242-251, 2001   과학기술학회마을
11 C. Aprea, F. de Rossi and A. Greco, 'Experimental evaluation of R22 and R407C evaporative heat transfer coefficients in a vapour compression plant', International Journal of Refrigeration, Vol. 23, pp. 366-377, 2000   DOI   ScienceOn
12 K. Hashizume,'Flow pattern and void fraction of refrigerant two-phase flow in a horizontal pipe', Bullettin of JSME, Vol. 26, No. 219, pp. 597-602, 1983
13 M. Shah, A new correlation for heat transfer during boiling flow through pipes, ASHRAE Transaction, Vol. 82, No. 2, pp. 66-86, 1976
14 E. Torrella, J. N. Esbri and R. Cabello, 'Boiling heat transfer coefficient variation for R407C inside horizontal tubes of a refrigerating vapour compression plant's shell and tube evaporator', Applied Energy, Vol. 83, No. 3, pp. 239-252, 2006   DOI   ScienceOn