PERFORMANCE ANALYSIS OF REFRIGERATED DISPLAY CABINETS WITH R404A AND R22 REFRIGERANTS
Refrigerant R404A is being employed in modern supermarkets as a replacement of R22 because of its zero global warming potential. A modern supermarket contains a large number of display cabinets to store and display chilled and frozen food products. These display cabinets are invariably located remotely and served by central multi-compressor refrigeration systems. This paper simulates and compares the performance of R22 and R404A refrigerants in medium temperature refrigerated display cabinets for supermarket applications. The model of display cabinet is based on three sub-models, the air-cooling finned-tube evaporator, the air curtain and the display cabinet body. The evaporator coil is modeled using the distributed method which allows the investigation of alternative geometries. The air curtain is modeled using correlations developed from detailed finite difference models. Results indicate that a cabinet operating with R404A for the same operating conditions will have higher cooling load and higher refrigerant flow rate than as cabinet with R22. The model can be used to evaluate other refrigerants and optimize the performance of the evaporator coil. The model will also be used in an integrated supermarket refrigeration and environmental control system model.
Y.GE S.A.TASSOU
Mechanical Engineering, School of Engineering and Design ,Brunel University ,Uxbridge, Middlesex , UB8 3PH, UK
国际会议
The 22nd International Congress of Refrigeration(第22届国际制冷大会)
北京
英文
2007-08-21（万方平台首次上网日期，不代表论文的发表时间）