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Flammability classification and advantages of CO2/propane over pure CO2 in cooling systems.

Number: 0829

Author(s) : PAEZ A., BALLOT-MIGUET B., TOBALY P.

Summary

To improve the efficiency of CO2 at warm ambient temperatures, blending it with other substances like hydrocarbons is a viable solution. This modification alters the critical point of the refrigerant, enabling operation in subcritical conditions at the same warm ambient temperatures. One promising alternative is the CO2/propane blend. Furthermore, the CO2 blend introduces a temperature glide, which can enhance heat transfer in the evaporator.  
The present article shows the experimental results carried out in a laboratory facility at warm ambient conditions (25 °C and 35 °C) and five secondary fluid inlet evaporator temperatures: - 5 °C, 0 °C, 5 °C, 12 °C for a 70/30 CO2/ propane mixture. This study compares the performance of pure CO2 with that of a CO2/ propane blend. It analyses the cooling capacity and optimal high-pressure behavior for each of these conditions. Additionally, a flammability study is carried out for the CO2/ propane blend.

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Pages: 12

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Details

  • Original title: Flammability classification and advantages of CO2/propane over pure CO2 in cooling systems.
  • Record ID : 30031843
  • Languages: English
  • Subject: Technology
  • Source: Proceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
  • Publication date: 2023/08/21
  • DOI: http://dx.doi.org/10.18462/iir.icr.2023.0829

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