International Journal of Air-Conditioning and Refrigeration

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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The Study on the Performance Characteristics due to the Degree of Superheat in $NH_3$ Refrigeration System III - The Comparison of Heat Exchanger Types -

  • Hong Suck-Ju (Department of Mechanical Engineering, Chosun University) ;
  • Ha Ok-Nam (Department of Mechanical Engineering, Chosun University) ;
  • Lee Kyu-Tae (Department of Mechanical Engineering, Chosun University) ;
  • Ha Kyung-Soo (Graduate School, Department of Mechanical Engineering, Chosun University) ;
  • Jeong Song-Tae (Graduate School, Department of Mechanical Engineering, Chosun University) ;
  • Hong Seong-In (Graduate School, Department of Mechanical Engineering, Chosun University) ;
  • Yun Kab-Sig (Gwangju Polytechnic College) ;
  • Kim Yang-Hyun (Department of Building Equipment Chosun College of Science & Technology) ;
  • Kwon Il-Wook (Mycom Korea Chemistry Plant) ;
  • Lee Jong-In (Department of Automobile, Chosun College of Science & Technology)
  • Published : 2006.03.01
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Abstract

Because the usage of CFC and HCFC based refrigerants are restricted due to the depletion of ozone layer, the $NH_3$ gas, in the experiment is evaluated to the performance characteristics for the superheat control to improve the energy efficiency. The experiment is carried out about the condensing pressure of refrigeration system from 1,500 kPa to 1,600 kPa through the degree of superheat from 0 to $10^{\circ}C$ at each condensing pressure. As a result, in the case of shell and tube type of heat exchanger, the COP is more efficient than other cases at the degree of superheat $1^{\circ}C$ at each condensing pressure. In the case of shell and disk type of heat exchanger, the COP is the most efficient at the degree of superheat 0.

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References

  1. E. I. du Pont de Nemours & Co. Ltd., Technical Report; 1989, Du Pont Alternative Refrigerants, Applications Testing of HCFC123 and HFC-134a
  2. Soloman, S. and Wuebbles, D., 1994, ODPs, GWPs, and Future Chlorine/Bromine loading, Scientific Assessment of Ozone Depletion, . pp. 131-136
  3. Res. Found. Inform. Bull. Refrig., 1979,Effeet of Ammonia, Washington, D.C., p.4
  4. Mclinden, M., Klein, S., Lernmin, E. and Peskin, A., 1998, NIST Thermodynamic and Transport Properties of Refrigerants and Refrigerant Mixture (REFPROP) ver.6.0, National Institute of Standards and Technology, Boulder, CO, U.S.A
  5. Ha, O. N., Kwon, I. W., Jean, S. S., Lee, S. J., lung, S. T., Ha, K. S., Yun, K. S., Lee, J. I. and Hong, K. H., 2005, The study on performance characteristics of $NH_3$ refrigeration system for various degree of super-heat II, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 17, No.4, pp.297-302
  6. Higuchi, K., 1986, Electronic expansion valve and control, Refrigeration, Vol. 61, pp.45-52
  7. Cengel, Y. A. 2002, Heat Transfer, McGrawHill, New York, pp. 461-505