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An integration of the thermoelectric sub-cooler with the ejector-based vapour compression unit using natural refrigerants for system control and performance improvement.

Number: 0518

Author(s) : HAIDA M., ÖZYILDIZ T., BODYS J., FINGAS R., PENDZIALEK M., SMOLKA J., SÁNCHEZ D., ARANGUREN P.

Summary

The ejector technology has been widely introduced to vapour compression units, especially for the CO2 (R744) supermarket refrigeration systems, due to the significant COP improvement for high ambient temperatures. For this reason, further improvements of the system configuration and control that result in higher efficiency is required. Therefore, the main aim of this paper is to evaluate performance improvement and control of the ejector-based unit combined with the thermoelectric sub-cooler applied for refrigeration and heat pump applications. The investigation was done for different configurations of the thermoelectric sub-cooler implemented into the 50.0 kW R744 refrigeration test rig equipped with the vapour and liquid ejectors combined with thermoelectric sub-cooler and 8.0 kW propane ejector-based heat pump. Based on the preliminary results, the COP improvement was over 15% for the R744 refrigeration system and up to 14% for the R290 heat pump system when compared to the ejector-based system without thermoelectric sub-cooler.

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Pages: 11

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Details

  • Original title: An integration of the thermoelectric sub-cooler with the ejector-based vapour compression unit using natural refrigerants for system control and performance improvement.
  • Record ID : 30031804
  • 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.2023.0518

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