Browse > Article

Characteristics on Evaporating Heat Transfer and Pressure Drop of HCs Refrigerants  

Lee Kwang-Bae (Refrigeration and Air-Conditioning Engineering, School of Mechanical Engineering, Pukyong National University)
Lee Ho-Saeng (Refrigeration and Air-Conditioning Engineering, School of Mechanical Engineering, Pukyong National University)
Kim Jae-Dol (Refrigeration and Air-Conditioning Engineering, Tongmyong College)
Yoon Jung-In (School of Mechanical Engineering, Pukyong National University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.17, no.7, 2005 , pp. 681-687 More about this Journal
Abstract
Experimental results for heat transfer characteristic 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 m with 0.86 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. It showed the higher values in hydrocarbon refrigerants than R-22. Hydrocarbon refrigerants have higher pressure drop than R-22 in 12.7 mm and 9.52 mm. This results form the investigation can be used in the design of heat transfer exchangers using hydrocarbons as the refrigerant for the air- conditioning systems.
Keywords
Heat transfer coefficient; Hydrocarbon; Pressure drop; Natural refrigerant; Evaporator;
Citations & Related Records
연도 인용수 순위
  • Reference
1 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 ahorizontal tube, ASHRAE Transaction Research, Vol. 99, No. 2, pp. 90-96
2 Kwon, O. B., 1997, Performance characteristics of water sources heat pump using HCFC22 alternative refrigerants, Thesis for the Degree of Doctor of Philosophy, Pukyung University
3 Gursaran, D. and Mathur, P. E., 2000, Hydrodynamic characteristics of propane (R-290), isobutane (R -600a) and 50/50 mixture of propane and isobutane, ASHRAE Transactions Vol. 106, Part 2, pp. 571-582
4 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
5 Kurylo, M. J, 1990, The chemistry of stratosp heric ozone: Its response to natural and anthropogenic influences, Int. J Ref., Vol. 13, pp.62-72   DOI   ScienceOn
6 Wijaya, H. and Spatz, M. W, 1995, Twophase flow heat transfer and pressure drop characteristics of R-22 and R-32/125, ASHRAE Transaction, Vol. 101, Part 2, pp.1020-1026
7 Molina, M. J and Rowland, F. S., 1974, Stratospheric sink for chlorofluorornethanes: Chlorine atom catalyzed destruction of ozone, Nature, Vol. 249, pp.810-814   DOI
8 Ebner, T. and Halozan, H., 1994, Testing the available alternative- An examination of R-134a, R-152a and R-290, lEA HPC Newsletter, Vol. 12, No. 1
9 Spatz, M. W., Samuel, F. and Yana Motta, 2004, An evaluation of options for replacing HCFC-22 in medium temperature refrigeration systems, International Journal of Refrigeration, Vol. 27, No.5, pp.475-483   DOI   ScienceOn