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Transcritical R744 multi-temperature refrigerated container system designed for high ambient temperature operation.

Number: 292575

Author(s) : LAWRENCE N., ELBEL S., HRNJAK P.

Summary

The paper describes the experimental evaluation of a transcritical R744 system designed to serve in a multi-temperature refrigerated container unit. The high ambient temperatures often encountered in this application, especially for a fluid like CO2, require careful attention to compressor selection and gas cooler design. To evaluate different compressor options, a laboratory breadboard CO2 system was used to test a single-stage compressor compared to an enhanced system with multi-stage compression and intercooler plus an ejector for improved evaporator performance and pressure lift. The results of the experimental evaluation show that the single-stage compression system is limited to an ambient temperature of about 40°C, while the multi-stage compression system is able to operate with sufficient capacity at ambient temperature in excess of 50°C. Also presented is the actual prototype CO2 refrigerated container unit to be evaluated.

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Details

  • Original title: Transcritical R744 multi-temperature refrigerated container system designed for high ambient temperature operation.
  • Record ID : 30027579
  • Languages: English
  • Subject: Technology
  • Source: 6th IIR International Conference on Sustainability and the Cold Chain. Proceedings: Nantes, France, August 26-28 2020
  • Publication date: 2020/08/26
  • DOI: http://dx.doi.org/10.18462/iir.iccc.2020.292575
  • Document available for consultation in the library of the IIR headquarters only.

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