[KSCI] Korea Science Citation Index Service

Characteristics of Hydrocarbon Refrigerants on Evaporating Heat Transfer and Pressure Drop

Lee Ho-Saeng (Graduate School, Refrigeration and Air-Conditioning Engineering, School of Mechanical Engineering, Pukyong National University)
Phan Thanh Tong (Graduate School, Refrigeration and Air-Conditioning Engineering, School of Mechanical Engineering, Pukyong National University)
Yoon Jung-In (School of Mechanical Engineering, Pukyong National University)

Publication Information

International Journal of Air-Conditioning and Refrigeration / v.14, no.3, 2006 , pp. 102-109 More about this Journal

Abstract

Experimental results for heat transfer characteristics and pressure gradients of HCs refrigerants R-290, R-600a, R-1270 and HCFC refrigerant R-22 during evaporating inside horizontal double pipe heat exchangers are presented. The test sections which has one tube diameter of 12.70 mm with 0.89 mm wall thickness, another tube diameter of 9.52 mm with 0.76 mm wall thickness are used for this investigation. The local evaporating heat transfer coefficients of hydrocarbon refrigerants were higher than that of R-22. The average evaporating heat transfer coefficient increased with the increase of the mass flux, with the higher values in hydrocarbon refrigerants than R-22. Hydrocarbon refrigerants have higher pressure drop than R-22. Those results from the investigation can be used in the design of heat exchangers using hydrocarbons as the refrigerant for the air-conditioning systems.

Keywords

Heat transfer coefficient; Hydrocarbon; Pressure drop; Natural refrigerant; Evaporator;

Citations & Related Records

Reference

1	Ebner, T. and Halozan, H., 1994, Testing the available alternative-an examination of R-134a, R-152a and R-290, IEA HPC Newsletter, Vol. 12, No. 1
2	Kwon, O. B., 1997, Performance characteristics of water sources heat pump using HCFC22 alternative refrigerants, PhD thesis, Pukyong National University, Korea
3	Chisholm, D., 1983, Two-Phase Flow in Pipelines and Heat Exchangers, Longman
4	Wijaya, H. and Spatz, M. W., 1995, Twophase flow heat transfer and pressure drop characteristics of R-22 and R-32/125, ASHRAE Transaction 101, Part 2, pp.1020-1026
5	Kandlikar, S. G., 1990, A general correlation for saturated two-phase flow boiling heat transfer inside horizontal and vertical tubes, Journal of Heat Transfer, Vol. 112, pp.219-228 DOI
6	Molina, M. J. and Rowland, F. S., 1974, Stratospheric sink for chlorofluoromethanes: chlorine atom catalyzed destruction of ozone, Nature, Vol. 249, pp.810-814 DOI
7	Didion, D. A. and Bivens, D. B., 1990, Role of refrigerant mixtures as alternatives to CFCs, International Journal of Refrigeration, Vol. 13, pp. 163-175 DOI ScienceOn
8	Torikoshi, K. and Ebisu, T., 1993, Heat transfer characteristics and pressure drop characteristics of R-134a, R-32 and a mixture of R-32/R-134a inside a horizontal tube, ASHRAE Transaction Research, Vol. 99, No.2, pp. 90-96
9	Kurylo, M. J., 1990, The chemistry of stratosphericozone: its response to natural and anthropogenic influences, International Journal of Refrigeration, Vol. 13, pp. 62-72 DOI ScienceOn
10	James, R. W. and Missenden, J. F., 1992, The use of propane in domestic refrigerators, International Journal of Refrigeration, Vol. 15, No.2, pp. 95-100 DOI ScienceOn