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Single-phase air parallel ejectors: An experimental and numerical study.

Author(s) : RAND C. P., POIRIER M., PONCET S.

Type of article: IJR article

Summary

Ejector-based refrigeration systems (ERS) raise a lot of interest, given their lower electrical consumption compared to conventional refrigeration systems. However, a single ejector suffers from a lack of capacity flexibility, while the commercial success of this technology often relies on its ability to handle the fluctuating heating load availability and cooling load requirements. To that end, this work proposes the use of multiple ejectors having similar performance curves that could operate individually or simultaneously, according to the needs. To investigate the suitability of the proposed solution, a test bench equipped with two ejectors having different capacities, and a turbulence model, are used. The results show that the performance of the two ejectors is exactly the same, whether they are used separately or simultaneously. To the best of the author’s knowledge, it is shown here for the first time that, when several ejectors are used simultaneously, they each retain their performance, without any disturbance of their entrainment ratio or critical outlet pressure. This important new finding paves the way for the design of ERS for variable capacity applications, such as solar cooling systems.

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Pages: 32-40

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Details

  • Original title: Single-phase air parallel ejectors: An experimental and numerical study.
  • Record ID : 30031653
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 150
  • Publication date: 2023/06
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2023.01.018

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