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首页> 外文期刊>International Journal of Refrigeration >Experimental analysis of R-450A and R-513A as replacements of R-134a and R-507A in a medium temperature commercial refrigeration system
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Experimental analysis of R-450A and R-513A as replacements of R-134a and R-507A in a medium temperature commercial refrigeration system

机译：R-450A和R-513A在中温商业制冷系统中R-134a和R-507a的替代品的实验分析

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Highlights?R-450A and R-513A as drop-ins of R-134a and R-507A are analyzed in this paper.?Evaluation made with a MT commercial direct expansion system in a climatic chamber.?R-513A consumption varied between -1.6 to +1.2% vs R-134a, 8.2 to -4.4% vs R-507A.?R-450A consumption varied between +1.3 to +5.8% vs R-134a, 0 to -3.3% vs R-507AAbstractThis work presents the experimental evaluation of R-513A (GWP?=?573) and R-450A (GWP?=?547) as R-134a (GWP?=?1301) drop-in replacements and as R-507A (GWP?=?3987) retrofits in a commercial direct expansion refrigeration system for medium temperature applications (2?°C). The evaluation covered 24-hour tests using a single-stage cycle with semi-hermetic compressor, an electronic expansion valve customized for each refrigerant and a commercial vertical cabinet with doors placed inside a climatic chamber. The tests were performed at three water dissipation temperatures (23.3, 32.8 and 43.6?°C). Experimental results indicate that R-513A and R-450A can operate with R-134a plants, with increments in energy consumption between ?1.6 to +1.2% for R-513A and from +1.3 to +6.8% for R-450A, whereas in comparison with R-507A, R-513A offered reductions in energy consumption between 4.4 to 8.2% and R-450A between 0 to 3.3%. The paper analyzes the modification of the operating pressures/temperatures and the energy indicators using the four refrigerants.]]>
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