Simulação de um sistema de refrigeração por compressão de vapor usando fluidos sintéticos de baixo impacto Ambiental

Abstract

The harmfull effects of refrigerants to man and the environment has been proved to be the driving cause for the search for new compounds capable of satisfying the demands of refrigeration. R1234yf and R1234ze(E) are hydrofluorolefins (HFOs) that constitute the fourth generation of refrigerants, with no ozone depletion potential (ODP) and low global warming potential (GWP). They were compared to R134a, which has high GWP, by means of simulations using the software Engineering Equation Solver in a vapor-compression refrigeration system. In the evaluation of system, parameters such as cooling capacity, coeficient of performance (COP), compressor power and flow rates were considered. utomotive refrigeration parameters were used because it is a sector that already employs the new generation of refrigerants in several products. Using R134a as a reference, for the same volumetric flow, R1234yf presented a reduction of 4.25% in the power required for the compressor and 5.8% in the cooling load, while R1234ze(E) showed decreases of 24.33% and 24.06% in the power required for the compressor and cooling load, respectively.