TITLE:
Analysis of R134a Organic Regenerative Cycle
AUTHORS:
André Felippe Vieira da Cunha, Sandino Lamarca Santos Souza
KEYWORDS:
Solar Energy, Regenerative Organic Rankine Cycle, R134a Refrigerant
JOURNAL NAME:
Journal of Power and Energy Engineering,
Vol.8 No.5,
May
28,
2020
ABSTRACT: 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.