Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
권호 표지

Performance Characteristics of a Cascade Refrigeration System with Internal Heat Exchanger using Carbon Dioxide (R744) and Propane (R290)

내부 열교환기 부착 $CO_2-C_3H_8$용 캐스케이드 냉동시스템의 성능 특성

  • Son, Chang-Hyo (School of Mechanical Engineering, Pukyong National Univ.)
  • 손창효 (부경대학교 기계공학부)
  • Published : 2009.12.30
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, cycle performance analysis of $CO_2-C_3H_8$ (R744-R290) cascade refrigeration system with internal heat exchanger is presented to offer the basic design data for the operating parameters of the system. The operating parameters considered in this study include subcooling and superheating degree and gas cooling pressure and evaporating temperature in the propane (R290) low temperature cycle and the carbon dioxide (R744) high temperature cycle. The main results were summarized as follows : The COP of cascade refrigeration system of $CO_2-C_3H_8$ (R744-R290) increases with the increasing subcooling degree, but decreases with the increasing superheating degree. The COP of cascade refrigeration system increases with the increasing evaporating temperature, but decreases with the increasing gas cooling pressure. Therefore, superheating and subcooling degree, compressor efficiency, evaporating temperature and gas cooling pressure of $CO_2-C_3H_8$ (R744-R290) cascade refrigeration system have an effect on the COP of this system.

Keywords

References

  1. Sawalha, S., 'Using $CO_2$ in supermarket refrigeration'. ASHRAE J. Vol. 47, No. 8, 2005, pp. 26-30
  2. Wilson, I. and Maier, D., 'Carbon dioxide for use as a refrigerant. In: Refrigeration Science and Technology', Proceedings, IIR-IRHACE Conference, Innovative Equipment and Systems for Comfort and Food Preservation. The University of Auckland, 2006, pp. 305-311
  3. S. N. Park and M. S. Kim, 'Performance of autocascade refrigeration system using carbon dioxide and R134a', Korea J. of Air-Conditioning and Refrigeration Engineering, Vol. 11, No. 6, 1999, pp. 880-890
  4. C. Chaichana, L. Aye and W.W.S. Charters, 2003. 'Natural working fluids for solar-boosted heat pumps'. Int. J. Refrigeration, Vol. 26, 2003, pp. 637-643 https://doi.org/10.1016/S0140-7007(03)00046-X
  5. T. S. Lee, C. H. Liu and T. W. Chen, 'Thermodynamic analysis of optimal condensing temperature of cascade condenser in $CO_2/NH_3 $cascade refrigeration systems', Int. J. Refrigeration Vol. 29, 2006, pp. 1100-1108 https://doi.org/10.1016/j.ijrefrig.2006.03.003
  6. S. Bhattacharyya, S. Mukhopadhyay, A. Kumar, R. K. Khurana and J. Sarkar, 'Optimization of a $CO_2$–$C_3H_8$ cascade system for refrigeration and heating', Int. J. Refrigeration, Vol. 28, 2005, pp. 1284-1292 https://doi.org/10.1016/j.ijrefrig.2005.08.010
  7. P. K. Bansal and S. Jain, 'Cascade systems: past, present, and future', ASHRAE Trans. Vol. 113, No. 1, 2007, pp. 245-252 (DA-07-027)
  8. EES: Engineering Equation Solver, 2006. fChart Software Inc