IIR document

New generation of air cooled heat exchangers for CO2 applications.

Number: pap. n. 22

Author(s) : FILIPPINI S., MERLO U.


In several refrigeration applications, CO2 is an excellent and environmentally-friendly solution; LU-VE has designed very efficient heat exchangers for CO2 applications and has been able to make important developments thanks to the use of its modern test ring. This plant 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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  • Original title: New generation of air cooled heat exchangers for CO2 applications.
  • Record ID : 30014623
  • Languages: English
  • Source: 6th Conference on Ammonia and CO2 Refrigeration Technology. Proceedings: Ohrid, North Macedonia, April 16-18, 2015.
  • Publication date: 2015/04/16


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