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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
SUBCRITICAL R744 REFRIGERATION SYSTEMS FOR SUPERMARKET APPLICATIONS: A REVIEW
Submission Author:
Frank Wiliam Adolfo Blanco Ojeda , MG , Colombia
Co-Authors:
Frank Wiliam Adolfo Blanco Ojeda, David Fernando Marcucci Pico, Elena Peñaranda, Erick Daniel Rincón Castrillo, ENIO PEDONE BANDARRA FILHO
Presenter: Frank Wiliam Adolfo Blanco Ojeda
doi://10.26678/ABCM.ENCIT2020.CIT20-0412
Abstract
This work presents a review of the arrangements propose in literature for subcritical refrigeration systems with R744, generally used in supermarkets. Therefore, are described different configurations with direct and indirect expansion such as: medium and low temperature evaporator configuration in the low temperature cycle and the medium temperature evaporator configuration in the high temperature cycle and the expansion configuration indirect with R744 and ethylene glycol. In addition, are presented the main performance results of the cascade refrigeration cycles that operate with different refrigerants in the high temperature cycle, as: R717, R290, R134a and R404A. The results indicate that the cascade configuration with flooded evaporator is the most promising configuration in terms of performance in cascade cooling systems with R744. However, the implementation of this system is more complex and costly, due to the use of the circulation pump.
Keywords
Supermarkets, Refrigeration, Cascade, R744, performance
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