Author(s)

André Felippe Vieira da Cunha^1*, Sandino Lamarca Santos Souza²

¹Department of Nuclear Energy, Federal University of Pernambuco (UFPE), Recife, Brazil.
²Department of Mechanical Engineering, Federal University of Pernambuco (UFPE), Recife, Brazil.

The analysis of organic regenerative cycles is necessary to verify the possibilities of increasing the work and efficiency of a thermodynamic cycle according to some control parameters. The results obtained from this work can be beneficial in several areas such as solar thermal energy. Simulations of an organic regenerative cycle with up to 4 extractions were carried out in order to analyze the behavior of maximum efficiency and the work generated in the turbine. R134a was used as an organic fluid, used in low temperature cycles. Evaporation temperature data between 60°C and 100°C and superheat temperatures equal to 120°C, 200°C and 300°C were tested for cycle analysis. Thus, it was possible to verify the work behavior and maximum efficiency depending on the number of extractions, superheating temperature and evaporation temperature. The models and simulations were made using the Engineering Equation Solver (EES) software and the results were analyzed in Excel. It was concluded that the maximum efficiency increases with the increase of the evaporation temperature and the number of extractions and decreases with the increase of the superheat temperature. The turbine work grows by increasing the evaporation and superheat temperatures, but decreases with the increase in extractions.

Solar Energy, Regenerative Organic Rankine Cycle, R134a Refrigerant

Cunha, A. and Souza, S. (2020) Analysis of R134a Organic Regenerative Cycle. Journal of Power and Energy Engineering, 8, 32-45. doi: 10.4236/jpee.2020.85003.