Design optimisation of CO2 gas cooler/condenser in a refrigeration system

Y.T. Ge, S.A. Tassou, I. Dewa Santosa and K. Tsamos

Applied Energy, 2015, vol. 160, issue C, 973-981

Abstract: As a natural working fluid, CO2 has been widely applied in refrigeration systems where heat is conventionally released to ambient through external airflow. Owing to its extraordinary thermophysical properties, especially a low critical temperature, the CO2 heat release through a high-pressure side heat exchanger will inevitably undergo either supercritical or subcritical processes, depending on ambient air temperatures and head pressure controls. Correspondingly, the heat exchanger will act intermittently as either a gas cooler or condenser within the system during an annual operation. Such evidence should therefore be taken into account for an optimal design of the heat exchanger and head pressure controls in order to significantly enhance the performance of both components and the associated system.

Keywords: CO2 gas cooler or condenser; Test facilities; Experiment and modelling; Heat exchanger sizes and controls; Refrigeration system (search for similar items in EconPapers)
Date: 2015
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Citations: View citations in EconPapers (9)

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DOI: 10.1016/j.apenergy.2015.01.123

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