Eventos Anais de eventos
ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
CONDENSING TEMPERATURE OPTIMIZATION OF CASCADE CONDENSER IN A SUBCRITICAL REFRIGERATION SYSTEM WITH R1234YF/R744
Submission Author:
Frank Wiliam Adolfo Blanco Ojeda , MG , Colombia
Co-Authors:
Frank Wiliam Adolfo Blanco Ojeda, Erick Daniel Rincón Castrillo, ENIO PEDONE BANDARRA FILHO
Presenter: Frank Wiliam Adolfo Blanco Ojeda
doi://10.26678/ABCM.ENCIT2022.CIT22-0502
Abstract
In this paper a thermodynamic analysis of a subcritical refrigeration cycle is presented, emulating a supermarket application in a tropical climate, using the refrigerants R1234yf at the high temperature cycle and R744 at the low temperature cycle. These mentioned fluids are characterized by a low GWP and a zero OPD. In the study of a cascade condenser, a multiple linear equation is proposed using genetic algorithm, which expresses the COP values as a result of the condensing temperature at the low temperature cycle and the difference of temperatures between the high and low temperature cycles. These parameters are important, since it reflects directly on the efficiency of the cascade refrigeration system. Once the regression was obtained, the previously mentioned parameters were optimized for a maximum coefficient of performance, obtaining a maximum value of 1.97 for the condensing temperature of 1.4 °C and a temperature difference between the cycles of 1 °C at the cascade condenser.
Keywords
Refrigeration, condenser, Cascade, Optimization
