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Evaluation of CO2-doped blends in single-stage with IHX and parallel compression refrigeration architectures.

Number: 0647

Author(s) : MARTINEZ-ANGELES M., SICCO E., TOFFOLETTI G., NEBOT-ANDRÉS L., SÁNCHEZ D., CABELLO R., CORTELLA G., LLOPIS R.

Summary

CO2 refrigeration systems are used worldwide for medium to large applications as they are environmentally friendly and have high security. Lately, the introduction of another refrigerant in small quantities to CO2 has aroused interest in scientific ambits, since CO2 mixed with fluids whom critical temperatures are higher permits the cycle move from transcritical conditions to subcritical with the consequent increments of COP in comparison to that of pure CO2. This work proposes a theoretical study of two of the most CO2 used cycles, base cycle with internal heat exchanger (IHX) and cycle with parallel compression (PC), working with CO2-doped mixtures, being the doping agents the fluids R-152a, R-1234yf, R1234ze(E) and R-1233zd(E). The work evaluates cycles energetic performances for an evaporating level of 10ºC and heat rejection temperatures from 20ºC to 40ºC. It anticipated improvements up to 5.8% for the IHX and 10.0% for the PC cycle.

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Pages: 13

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Details

  • Original title: Evaluation of CO2-doped blends in single-stage with IHX and parallel compression refrigeration architectures.
  • Record ID : 30031815
  • Languages: English
  • Subject: Technology, 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.2023.0647

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