EXPERIMENTAL EVALUATION OF A CASCADE REFRIGERATION SYSTEM USING R-134a AND R-404a
Resumo
Cascade refrigeration system is an attractive technology for low-temperature requirement, allowing operation under these conditions with positive suction pressures and a moderate condensation pressure at ambient temperature. This work describes a performance analysis of a cascade refrigeration prototype equipped with hermetic compressors working with R-134a and R-404a as refrigerants, thermally connected by a tube-in-tube-type cascade-condenser. Energy flows and performance parameters were evaluated under different evaporating temperature conditions of the low temperature cycle (LTC). The results showed an increase in energy efficiency ratio (EER) and coefficients of performance (COP) of cascade system as well as of each cycle with the increase of LTC evaporating temperature, even with a simultaneous increase of temperature difference in cascade-condenser.
Biografia do Autor
Engenheiro Mecânico com atuação na área de refrigeração e climatização, energia, petróleo e gás, biocombustíveis, motores de combustão interna, mestre em Mecatrônica e doutor em Energia. Professor do Instituto de Ciência, Tecnologia e Inovação da Universidade Federal da Bahia.
Bacharel em Ciências Exatas e Tecnológicas, Engenheiro Mecânico pela Universidade Federal do Recôncavo da Bahia. Atuante na área de Refrigeração por mais de 5 anos.
Técnico em Eletromecânica pelo CETEB, Engenheiro Mecânico, Bacharel Ciências Exatas e Tecnológicas, Engenheiro Mecânico pela Universidade Federal do Recôncavo da Bahia, pós-graduando em Engenharia de climatização pela Faculdade Profissional (FAPRO).
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