Influence of minor variation in R454B composition on performance of rooftop air-conditioning units
In order to study the influence of minor variation in R454B composition on the performance of the rooftop air-conditioning units,the test is conducted on one air-cooled rooftop air-conditioning unit under the refrigeration conditions,to analyze the changes of performance parameters such as cooling capacity,energy efficiency ratio and compressor discharge temperature under different composition ratios.The results show that the rated cooling capacity changes between 0.5%and 1.4%,and the rated EER chan-ges between-0.10%and 0.32%when the proportion of R32 increases from 1.4%to 2.2%.The changes of saturation condensing temperature and evaporating temperature are not significant.
rooftop air-conditioning unitsair-cooledrefrigerantcooling capacityenergy efficiency ratio
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