Hydrofluorocarbons (HFCs) are widely used today in supermarket refrigeration and air conditioningapplications, despite their environmentally deleterious nature. However, the EU F-Gas Regulation 517/2014ambitiously aims at lessening the HFC consumption by 79% by 2030. A further drop in the intake andproduction of these man-made refrigerants on global perspectives is offered by the recent adoption of theKigali Amendment to the Montreal Protocol. Efficient HFC-free technologies for supermarket heating,cooling and refrigeration, such as fully integrated R744 multi-ejector enhanced parallel compression systems,are already available for the European food retail industry.In this theoretical work the energy consumption and the carbon footprint of a multi-ejector R744refrigeration solutionintegrated with the air conditioning (AC) equipment are contrasted with those of twoseparated HFC-based units. The investigation was based on an average-size supermarket located in variousSouthern Europe cities. The results revealed that reductions in the electricity intake as well as in the TotalEquivalent Warming Impact (TEWI) up to respectively 24.9% and 74.8% can be achieved by adapting therefrigerating system layout to the peculiarities of R744.
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