Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8070762 | Energy | 2018 | 30 Pages |
Abstract
The replacement of HFCs using lower GWP refrigerants in the coming years is a priority to reduce the predicted climate change. The exergy analysis of vapor compression systems can help to identify the feasibility of alternative fluids in existing installations and the potential to improve them. In this sense, this paper presents an exergy analysis of an experimental setup which operates with R134a and the alternative HFO/HFC mixture R513A. The evaporating temperature is ranges between â15â¯Â°C and 5â¯Â°C, while the condensing temperature is set at 30â¯Â°C and 35â¯Â°C. In this analysis, the highest amount of exergy destruction rate is obtained at the compressor, followed by the evaporator. The maximum exergy efficiencies are observed at the condenser and the thermostatic expansion device. Finally, the average global exergy efficiency of R513A when replaced R134a in this refrigeration experimental setup is 0.4% higher (absolute difference), and with respect to the components, there is only slight reduction in efficiency in the condenser using R513A. Therefore, the R513A replacement is acceptable according to the second law of thermodynamics.
Keywords
Related Topics
Physical Sciences and Engineering
Energy
Energy (General)
Authors
Adrián Mota-Babiloni, J.M. Belman-Flores, Pavel Makhnatch, JoaquÃn Navarro-EsbrÃ, J.M. Barroso-Maldonado,