IIR document

Performance analysis of an experimental R404A/CO2 cascade refrigeration system.

Number: pap. n. 44

Author(s) : YILMAZ B., ÖZYURT A., YILMAZ D., et al.


The usage of CO2 in refrigeration systems recently becomes more frequent due to both being a natural refrigerant and its thermo–physical properties. In this study, the design, construction and experimental performance tests of a cascade R404A/CO2 refrigeration system at specified operating conditions are aimed. The investigated refrigeration system contains two cycles in which carbon dioxide and R404A refrigerants are used in high and low temperature cycles, respectively. The performance of the CO2 evaporator having 6 kW cooling capacity has been tested for specified standard room condition to be – 34°C according to ANSI/ASHRAE 33 (2000) standards. The temperature, pressure, mass flow rate and humidity measurements from different components of the system have been collected using a data acquisition system. Then data is processed to evaluate the overall coefficient of performance (COP) of the cascade refrigeration system.

Available documents

Format PDF

Pages: 8 p.


  • Public price

    20 €

  • Member price*

    15 €

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).


  • Original title: Performance analysis of an experimental R404A/CO2 cascade refrigeration system.
  • Record ID : 30014670
  • Languages: English
  • Source: 6th Conference on Ammonia and CO2 Refrigeration Technology. Proceedings: Ohrid, North Macedonia, April 16-18, 2015.
  • Publication date: 2015/04/16


See other articles from the proceedings (53)
See the conference proceedings