IIR document

Latest development of air cooled heat exchangers for CO2 applications.

Number: pap. ID18



In many refrigeration applications, CO2 seems to be an excellent and environmentally-friendly solution; LU-VE has been able to make important developments thanks to the use of its modern test ring, which can test the performance of CO2 finned heat exchangers, both air cooled unit coolers and gas coolers. The new testing plant enabled the launch of a specific project for a CO2 fin-and-tube heat exchanger, with the primary aim of improving knowledge of heat exchange phenomena in evaporation, condensation and during trans-critical gas cooling. The influence of oil on internal heat exchange coefficient also enters into the scope of the research. The paper describes the testing activity, the calibration made on software that calculates product performance, and potential improvements to products. In particular, it was possible to calibrate a specific method able to take into account the behaviour of the fluid during trans-critical cooling, properly considering all the parameters affecting real performance.

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Pages: 8 p.


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  • Original title: Latest development of air cooled heat exchangers for CO2 applications.
  • Record ID : 30012280
  • Languages: English
  • Source: 11th IIR Gustav Lorentzen Conference on Natural Refrigerants (GL2014). Proceedings. Hangzhou, China, August 31-September 2, 2014.
  • Publication date: 2014/08/02


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