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157 - INFLUÊNCIA DE PARÂMETROS OPERACIONAIS NO COP DE CICLOS DE REFRIGERAÇÃO COM HIDROCARBONETOS: UMA ANÁLISE COMPARATIVA ENTRE R1270, R290 E R600a

Doi: 10.47094/978-65-284-0452-0/1546-1555

PALAVRAS CHAVE: Refrigerantes hidrocarbonetos. Ciclo de compressão de vapor. Simulação termodinâmica. Coeficiente de performance (COP). Sustentabilidade ambiental.

KEYWORDS: Hydrocarbon refrigerants. Vapor compression cycle. Thermodynamic simulation. Coefficient of performance (COP). Environmental sustainability.

ABSTRACT:
The growing demand for energy-efficient and environmentally sustainable refrigeration systems has driven the adoption of natural refrigerants, among which hydrocarbons stand out for their reduced global warming potential (GWP), zero ozone depletion potential (ODP), and high thermodynamic efficiency. In this context, this study performs a comparative analysis of the performance of a vapor compression refrigeration cycle operating with propylene (R1270), propane (R290), and isobutane (R600a), evaluating the individual influence of operational parameters on the coefficient of performance (COP). The simulations were conducted using CoolPack software, adopting a reference cycle and systematically varying condensation temperature, evaporation temperature, degrees of superheating and subcooling, pressure drops in the evaporator, condenser, and suction, liquid, and discharge lines, as well as the isentropic efficiency of the compressor. The results indicate that evaporation temperature, condensation temperature, and isentropic efficiency are the parameters with the greatest impact on COP, while pressure drops and thermal degrees exert a moderate influence on overall performance. Comparative analysis shows that the refrigerants (R1270, R290, and R600a) follow similar response patterns, but with small numerical variations in COP, which reinforces the importance of selecting the appropriate refrigerant according to operating conditions. These findings highlight the sensitivity of the cycle to operating conditions and contribute to the development of more efficient refrigeration solutions aligned with contemporary environmental requirements.

Autores

  • Arthur Souza Lyra

  • Cleiton Rubens Formiga Barbosa

  • Cleiton Rubens Formiga Barbosa Júnior

  • Edilson Marinho da Silva Junior

  • João Lucas Araujo Rodrigues

  • Rafael Matos de Souza

  • Thiago da Silva André

  • Wertson da Silva Resende

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