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Performance of the Prototype of a Transcritical R744 Mobile A/C System
Technical Paper
1999-01-0872
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper describes the performance of a transcritical R744 a/c system for a typical compact car. The prototype was designed to have heat exchanger dimensions, face velocities and air-side pressure drops nearly identical to conventional R134a systems. Heat exchangers are made of flat aluminum extruded multiport tubes; the 21 cc compressor is of swash plate design, and the system can be controlled by either a needle valve or a backpressure valve.
Test matrices are defined for the purpose of developing component and system simulation models, as well as supporting data-to-data comparisons at normal, seasonal and extreme operating conditions. The design of experiments and test facility are also discussed. Results are presented for the R744 system operating in both steady state and cycling modes.
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Authors
- Ryan P. McEnaney - Air Conditioning and Refrigeration Center (ACRC), University of Illinois
- Y. C. Park - Air Conditioning and Refrigeration Center (ACRC), University of Illinois
- J. M. Yin - Air Conditioning and Refrigeration Center (ACRC), University of Illinois
- P. S. Hrnjak - Air Conditioning and Refrigeration Center (ACRC), University of Illinois
Citation
McEnaney, R., Park, Y., Yin, J., and Hrnjak, P., "Performance of the Prototype of a Transcritical R744 Mobile A/C System," SAE Technical Paper 1999-01-0872, 1999, https://doi.org/10.4271/1999-01-0872.Also In
References
- Lorentzen, G. Pettersen, J. 1993 A New, Efficient and Environmentally Benign System for Car Air-Conditioning Int. Journal of Refrigeration 16 1 4 12
- Yin J. Park Y. C. Boewe D. McEnaney R. Beaver A. Bullard C. W. Hrnjak P. S. 1998 Experimental and Model Comparison of Transcritical CO 2 versus R134a and R410 System Performance Natural Working Fluids ′98, IIR - Gustav Lorentzen conference Oslo 331 340
- McEnaney R.P. Boewe D.E. Yin J. M. Park Y. C. Bullard C. W. Hrnjak P.S. 1998 Experimental Comparison of Mobile A/C Systems when Operated With Transcritical CO 2 Versus Conventional R134a International Refrigeration Conference at Purdue 145 150
- Park Y. C. McEnaney R. Boewe D. Yin J. M. Hrnjak P. S. 1999 Steady State and Cycling Performance of a Typical R134a Mobile A/C System SAE International Congress and Exposition, Paper 99PC-4
- Boewe D. Park Y. C. Yin J. Bullard C. W. Hrnjak P. S. 1999 The Role of a Suction Line Heat Exchanger in Transcritical R744 Mobile A/C Systems SAE International Congress and Exposition, Paper 99HX-3