Simulation and Performance Evaluation of Finned Tube Gas Cooler for Trans-Critical CO2 Refrigeration System


Article Preview

Carbon dioxide is one of the rediscovered sustainable options, as CFCs and HFCs are now in the list of regulated substances, to be phased out in time bound way. There are however various challenges to the successful use of CO2 as refrigerant. Cost effective and widely acceptable technology is demand of the time. Performance of trans-critical CO2 refrigeration systems is found to be sensitive to the gas cooler design. In the present work a detailed mathematical model is developed for a finned tube air cooled gas cooler and the same is validated using published literature. Subsequently, to achieve the lowest possible approach temperature, the performance of the gas cooler is analyzed for various air velocity and alternate pipe arrangements. The effect of increase in size of gas cooler to its performance is also studied.



Edited by:

Sally Gao and Tina Hu






D. K. Gupta and M. S. Dasgupta, "Simulation and Performance Evaluation of Finned Tube Gas Cooler for Trans-Critical CO2 Refrigeration System", Applied Mechanics and Materials, Vol. 281, pp. 324-328, 2013

Online since:

January 2013




[1] Gupta, D.K., Dasgupta, M.S., Gas Cooler Design Issues for Trans-critical Carbon Dioxide Refrigeration System in Indian Context; Proc. of the 3rd International Conference on Advances in Mechanical Engineering, SVNT, Surat, India, pp.229-233, January 4-6, (2010).

[2] Torahide, T., Development of Carbon Dioxide (CO2) Applied Refrigeration System, Automotive Alternate Refrigerant Systems Symposium, SAE, (2000).

[3] Bullard, C., Trans-critical CO2 Systems - Recent Progress and New Challenges, Review Article, IIR, (2004).

[4] Gupta, D.K., Singh, D.K., and Dasgupta, M. S, Environmental Effect on Gas Cooler Design for Trans-critical Carbon Dioxide Refrigeration System in Indian Context; Journal of Advanced Research in Mechanical Engineering (Vol. 1-2010/Iss. 3) pp.147-152.

[5] Yin, J.M., Bullard, C.W., and Hrnjak P.S., R-744 gas cooler model development and validation;, International Journal of Refrigeration 24 (2001) 692–701.

DOI: 10.1016/s0140-7007(00)00082-7

[6] Ortiz, T.M., D. Li, Groll, E.A., Evaluation of the performance potential of CO2 as a refrigerant in air-to-air air conditioners and heat pumps: system modeling and analysis, Final Report, ARTI-21CR/610-10030, December (2003).

[7] Kim .M.H., Pettersen , J., Bullard ,C.W., Fundamental process and system design issues in CO2 vapour compression systems; Progress in Energy and Combustion Science 30 (2004) 119–174.

DOI: 10.1016/j.pecs.2003.09.002

[8] Bensafi, A., Borg, S., Parent, D.; CYRANO a computational model for the detailed design of plate-fin-and-tube heat exchangers using pure and mixed refrigerants, International Journal of Refrigeration 20 (3) (1997) 218–228.

DOI: 10.1016/s0140-7007(96)00052-7

[9] Casson, V., Cavallini, A., Cecchinato, L. D. Del Col, L. Doretti, E. Fornasieri, L. Rossetto, C. Zilio, Performance of finned coil condensers optimized for new HFC refrigerants, ASHRAE Transactions 108 (2) (2002) 517–527.

[10] Hwang, Y. D., Jin, D.H., Adermacher, R., Hutchins, J.W.; Performance measurement of CO2 heat exchangers, ASHRAE Transactions (2005) 306–316.

[11] Pitla, S.S., Groll, E.A., Ramadhyani, S.; New correlation to predict the heat transfer coefficient during in-tube cooling of turbulent supercritical CO2, International Journal of Refrigeration 25 (2002) 887–895.

DOI: 10.1016/s0140-7007(01)00098-6

[12] Incropera, F.P.; DeWitt, D.P. Introduction to Heat Transfer, third ed., John Wiley and Sons, New York, (1996).

[13] Ge, T. Y., Croper, R. T.; Simulation and performance evaluation of finned-tube CO2 gas coolers for refrigeration systems; Applied Thermal Engineering 29 (2009) 957–965.

DOI: 10.1016/j.applthermaleng.2008.05.013

[14] Wang, C.C., Jang, J.Y., Chiou, N. F,. A heat transfer and friction correlation for wavy fin-and-tube heat exchangers, International Journal of Heat Mass Transfer 42 (1999) 1919–(1924).

DOI: 10.1016/s0017-9310(98)00288-9

In order to see related information, you need to Login.