The cooling performance analysis of R290 refrigerant instead of R404a at commercial freezer

Recently developed and developing countries pay attention to climate change issue. Global warming problem has been entered our lives after industrial revolution with increasing greenhouse gases and it has many negative effects such as melting glaciers, decresing agricultural area. One of the most important issues with global warming is energy efficieny. It is seen that scientists have done many studies recently for the conservation of energy which has a very important place in our lives. In this study, useage of natural and environment friendly refrigerant R290 has been investigated instead of R404A which has negative effect to global warming. Examination has been made on shelf-cooled commercial freezer. Comparative performans tests were performed and energy and exergy analysis are done. According to cooling performance test results, it has been seen that cooling performance of R290 refrigerant was close to R404A refrigerant. Also according to analysis it has been seen that system COP and exergy efficiency of cooling system with R290 refrigerant is higher than cooling system with R404A refrigerant %7 and %17 respectively. These performance tests and energy and exergy analysis show that R290 refrigerant can be used with a suitable compressor selection instead of R404A refrigerant in commercial vertical freezer.