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Experimental evaluation of alternative CO2-based blends for transcritical refrigeration systems.

Number: 0792

Author(s) : VIDAN-FALOMIR F., LARRONDO-SANCHO R., SÁNCHEZ D., MARTINEZ-ANGELES M., CALLEJA-ANTA D., NEBOT-ANDRÉS L., LLOPIS R., CABELLO R.

Summary

This work presents two refrigerant CO2 blends with R32 and R1270 designed with a theoretically non-flammability and a GWP below 150. Both mixtures were tested in a small-capacity vapour compression system with and without IHX, considering the same working conditions of heat rejection temperature and demanding conditions at the evaporator. Taking the pure CO2 results as a reference in a cycle without IHX, the blend of CO2/R32 enhanced the COP up to 18.1% with an optimal pressure reduction of 19.0% and a power consumption minimization of 17.1%. The mixture of CO2/R1270 presented a COP enhancement of 8.4% with an optimal pressure reduction of 8.0% and a power consumption minimization of 7.9%. In all cases, the use of the IHX resulted positively with increments compared to the pure CO2 base cycle of 6.4% for pure CO2, 13.3% for CO2/ R1270, and 24.7% for CO2/ R32. 

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Details

  • Original title: Experimental evaluation of alternative CO2-based blends for transcritical refrigeration systems.
  • Record ID : 30031837
  • Languages: English
  • Subject: HFCs alternatives
  • 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.2023.0792

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