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GL2024: Improving the performance of R744-refrigeration systems at high ambient temperatures

A paper presented during the 16th IIR-Gustav Lorentzen Conference on Natural Refrigerants proposes improving the performance of R744 refrigeration systems in transcritical operation using low-charge R290 mechanical subcooling.

At high ambient temperatures (above about 27°C), R744 refrigeration systems operate in transcritical mode, resulting in a significant increase in flash gas production during throttling. This results in a decrease in R744 cooling capacity and efficiency, which in turn ...

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