Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
ENERGY OPTIMIZATION TO REPLACE R134A IN A VAPOR COMPRESSION REFRIGERATION CYCLE
Submission Author:
Thiago Pereira Silva , MG
Co-Authors:
Thiago Pereira Silva, Kássio Nogueira Cançado, Katrine Barbosa Oliveira Chaves, Ramon de Paoli, Luiz Machado
Presenter: Katrine Barbosa Oliveira Chaves
doi://10.26678/ABCM.COBEM2023.COB2023-0489
Abstract
With the new directive implemented in 2014 by the European Parliament to reduce the use of gases with high GWP potential in the European Union and the growing increase in the refrigeration and air conditioning markets, several studies have been carried out to improve the efficiency of these cycles and find efficient alternatives to replace R134a as a refrigerant. The present work created a mathematical model capable of simulating different operating conditions of a refrigeration cycle that was validated with experimental data and enabled a genetic-type optimization algorithm to maximize energy efficiency based on the choice of condensing pressure and a refrigerant fluid. Adjusting the condensing pressure resulted in a 22% increase in the COP. COP increase of 32%, with R13,4a being the most energy energy-efficient for replacement of R134a, the fluid that showed the highest energy efficiency was R152a, with a COP increase of 28%abouto the initial conditions and efficiency 5% lower than that presented by R134a. The results also showed that, if well adjusted, it is possible to retrofit a refrigeration system without losing refrigeration capacity and energy efficiency.
Keywords
Optimization, GWP, COP, Refrigeration Cycle, R134a
