Experimental Studies on the Performance Characteristics of Heat Exchangers of $CO_2$ Air Conditioning System for Vehicle

자동차용 $CO_2$ 에어컨 시스템 열교환기 성능 특성에 관한 실험적 연구

  • 김성철 (자동차부품연구원 열제어시스템연구센터) ;
  • 이동혁 (자동차부품연구원 열제어시스템연구센터) ;
  • 원종필 (자동차부품연구원 열제어시스템연구센터)
  • Published : 2009.01.01

Abstract

The performance characteristics of heat exchangers which consist of a gas cooler, an evaporator and an internal heat exchanger have been investigated at various operating conditions of $CO_2$ air conditioning system by experiments. The heat exchangers were designed for use in the vehicle $CO_2$ air conditioning system, when considering the characteristics of heat transfer and high pressure as $CO_2$ refrigerant. This paper studied the performance of heat exchangers at various compressor speeds and expansion valve openings, and quantified the heat transfer rates and pressure drops. Heat transfer rates at the gas cooler and the evaporator were 6.9 kW and 5.2 kW, respectively, when the compressor speed was 4000 rpm and refrigerant vapor quality at the evaporator outlet was 0.98. Therefore, this paper carried out that the heat exchangers were analyzed to achieve superior performance for the vehicle transcritical $CO_2$ cycle.

Keywords

References

  1. EU News, Parliament opts for containment on F-gases, http://www.euractiv.com
  2. J. Yin, Y.C. Park, D. Boewe, R. McEnaney, A. Beaver, C.W. Bullard and P.S. Hrnjak, "Experimental and Model Comparison of Transcritical CO2 Versus R134a and R410 System Performance," Proc. of the IIR-Gustav Lorentzen Conference on Natural Working Fluids, Oslo, Norway, pp.376-387, 1998
  3. R. McEnaney, D. Boewe, J. Yin, Y.C. Park, C.W. Bullard and P.S. Hrnjak, "Experimental Comparison of Mobile A/C Systems When Operated with Transcritical $CO_2$ Versus Conventional R134a," Proc. International Refrigeration Conference at Purdue, pp.145-150, 1998
  4. J. S. Brown, S. F. Yana-Motta and P. A. Domanski, "Comparative Analysis of an Automotive Air Conditioning Systems Operating with $CO_2$ and R134a," Int. J. Refrig., Vol.25, pp.19-32, 2002 https://doi.org/10.1016/S0140-7007(01)00011-1
  5. H. Gentner, "Passenger car air conditioning using carbon dioxide as refrigerant," In: Proc. of the IIR-Gustav Lorentzen Conference on Natural Working Fluids, Oslo, Norway, pp. 303-313, 1998
  6. T. Tamura, Y. Yakumaru and F. Nishiwaki, "Experimental Study on Automotive Cooling and Heating Air Conditioning System Using $CO_2$ as a Refrigerant," Int. J. Refrig., Vol.28, pp.1302-1307, 2005 https://doi.org/10.1016/j.ijrefrig.2005.09.010
  7. S.C. Kim, J.C. Park, M.S. Kim and J.P. Won, "Performance Evaluation of a CO2 Heat Pump System for Fuel Cell Vehicles," Transactions of KSAE, Vol.16, No.1, pp.37-44, 2008
  8. S.C. Kim, D.H. Lee, H.S. Lee, J.P. Won, D.W. Lee and W.S. Lee, "Studies on the Performance Characteristics of an Electronically Controlled CO$_2$ Air Conditioning System for Fuel Cell Electric Vehicles," Transactions of KSAE, Vol.16, No.2, pp.150-157, 2008
  9. S.C. Kim, M.S. Kim and J.P. Won, "Experimental Studies on the Stack Cooling Performance Using a $CO_2$ Air Conditioning System in Fuel Cell Vehicles," Transactions of KSAE, Vol.16, No.3, pp.87-93, 2008
  10. M. Park, S.C. Kim, D.W. Kim and M.S. Kim, "Studies on the Steady State and Dynamic Characteristics of a Carbon Dioxide Air-conditioning System for Vehicles," KSME, Vol.31, No.6, pp.531-538, 2007 https://doi.org/10.3795/KSME-B.2007.31.6.531
  11. A. Rozhentsev and C. C. Wang, "Some Design Features of a $CO_2$ Air Conditioner," Applied Thermal Engineering, Vol.21, pp.871-880, 2001 https://doi.org/10.1016/S1359-4311(00)00087-9