Effect of heat conduction through the fins of a microchannel serpentine gas cooler of transcritical CO2 system

International Journal of Refrigeration

Volumn 30, Issue 3, 2007, Pages 389-397

  Park, Chang Yong ^a   Hrnjak, Pega ^a  

^a University of Illinois at Urbana Champaign   (United States)

Author keywords

CO2; Compression system; Experiment; Fin; Gas cooler; Microchannel; Refrigeration system; Thermal conductivity; Transcritical cycle

Indexed keywords

CARBON DIOXIDE; COMPUTER SIMULATION; ELECTRIC DISCHARGE MACHINING; FINS (HEAT EXCHANGE); HEAT CONDUCTION; HEAT EXCHANGERS; INFRARED IMAGING; REFRIGERATION; SERPENTINE; THERMAL CONDUCTIVITY;

COMPRESSION SYSTEM; GAS COOLERS; REFRIGERATION SYSTEM; SERPENTINE GAS COOLERS; TRANSCRITICAL CYCLE;

COOLING SYSTEMS;

EID: 33847224546     PISSN: 01407007     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.ijrefrig.2006.09.005     Document Type: Article

References (15)

1. Bullard C.W., Yin J.M., and Hrnjak P.S. Compact counterflow gas cooler for R744. ASHRAE Symposium (2002) (Atlantic City)
2. 2 Mobile A/C System (May 1999), VTMS, London
3. 2 heat pump for simultaneous cooling and heating applications. Int J Refrigeration 27 (2004) 830-838
4. Asinari P., Cecchinato L., and Fornasieri E. Effect of thermal conduction in microchannel gas coolers for carbon dioxide. Int J Refrigeration 27 (2004) 577-586
5. Yin J.M., Bullard C.W., and Hrnjak P.S. R-744 gas cooler model development and validation. Int J Refrigeration 24 (2001) 692-701
6. Beaver A.C., Yin J.M., Bullard C.W., and Hrnjak P.S. An Experimental Investigation of Transcritical Carbon dioxide Systems for Residential Air-conditioning. (ACRC Report CR-18) (1999), University of Illinois at Urbana-Champaign, Urbana, IL (USA)
7. ARI Standard 210/240. Standard for Unitary Air Conditioning and Air Source Heat Pump Equipment (2003), Air Conditioning and Refrigeration Institute, Arlington, VA (USA)
8. Elbel S., and Hrnjak P. Flash gas bypass for improving the performance of transcritical R744 systems that use microchannel evaporators. Int J Refrigeration 27 (2004) 724-735
9. Taylor B.N., and Kuyatt C.E. Guidelines for Evaluating and Expressing the Uncertainty of NIST Measurement Results. (NIST TN 1297) (1994), National Institute of Standards and Technology, Gaithersburg, MD (USA)
10. Klein S.A. Engineering Equation Solver, Academic Professional V7.205 (2004), F-Chart Software, Madison, WI (USA)
11. Kays W.M., and London A.L. Compact Heat Exchangers. third ed. (1984), McGraw-Hill, New York
12. Span R., and Wagner W. A new equation of state for carbon dioxide covering the fluid region from triple-point temperature to 1100 K at pressures up to 800 MPa. J Phys Chem Ref Data 25 (1996) 1509-1596
13. Churchill S.W. Friction-factor equation spans all fluid flow regimes. Chem Eng 7 (1977) 91-92
14. Gnielinski V. New correlations for heat and mass transfer in turbulent pipe and channel flow. Int Chem Eng 16 (1976) 359-368
15. Chang Y.J., and Wang C.C. A generalized heat transfer correlation for louver fin geometry. Int J Heat Mass Transf 40 (1997) 533-544