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The effect of fractionation inside the storage vessel and the impact of cycle architecture on the performance of ejector system with low-GWP zeotropic mixture of R1234yf/R32.

Number: 0373

Author(s) : HAIDER M.

Summary

This study numerically evaluates the performance gain potentials of different cycle architectures using low-GWP zeotropic mixtures of R1234yf/R32. Heat exchangers are modelled using a finite volume approach, ejector is modelled using modified Kornhauser model, and the variable speed compressor is modelled using 10-coefficient polynomials. The study finds that the fractionation inside the storage vessel and its location in the cycle can have a significant impact on the system performance. The COP of systems like conventional system and condenser outlet split system that employ a receiver and have the same circulating composition, improves by 12-22 % when a small amount of high-volatile substance is added. However, COP of the standard ejector cycle having a separator, and thus, two different circulating compositions for high and low-sides, decreases by almost 15 %. Capacity can almost be doubled for all the system by modulating the composition. These results are significantly helpful in designing future experiments.

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Pages: 10

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Details

  • Original title: The effect of fractionation inside the storage vessel and the impact of cycle architecture on the performance of ejector system with low-GWP zeotropic mixture of R1234yf/R32.
  • Record ID : 30031795
  • 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.2023.0373

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