Beyond the direct environmental benefits of employing CO2, pioneers of transcritical systems like Sobeys are finding them to be more energy (and therefore cost) efficient than traditional DX (direct expansion) refrigeration systems using synthetic refrigerants. While this energy efficiency is well-documented in moderate climates such as those in which Sobeys operates, the question remains whether it can be duplicated in warmer climates farther south. Sobeys, in a comparison of three ...

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