Semi-empirical analysis of HFC supermarket refrigeration retrofit with advanced configurations from energy, environmental, and economic perspectives
نویسندگان
چکیده
F-gas phase-down schedules will remove most of the HFCs (hydrofluorocarbons) used in refrigeration systems short term. Besides refrigerant substitution, configuration modifications can be considered existing installations to increase energy efficiency. Basic cycle, direct injection, economiser, parallel compression, and cascade configurations with internal heat exchanger have been proposed efficiency a supermarket system when replacing R-404A R-449A at low medium temperatures. Both are based on indirect expansion equipped subcooler. Their regular operation was recorded using during representative period. Then, semi-empirical approach is followed determine performance each configuration. Only compression (PC) basic cycle (IHX) benefit performance, highlighting temperature (MT) system. However, this not extended environmental analysis because charge PC significantly increases. Moreover, additional components extend expected payback period, drop-in replacement financially more interesting. Therefore, minor MT LT decreases 52% 60% carbon footprint, respectively. The period action below one year both circuits. This study provides methodology for predict alternative refrigerants' performance.
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ژورنال
عنوان ژورنال: International Journal of Refrigeration-revue Internationale Du Froid
سال: 2022
ISSN: ['1879-2081', '0140-7007']
DOI: https://doi.org/10.1016/j.ijrefrig.2022.02.017