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Refrigerants Selection for Automotive Air Conditioning System in Tropical Climates Centro Federal de Educação Tecnológica de Minas Gerais (CEFE
- Format:
- Book
- Conference/Event
- Author/Creator:
- Oliveira Dias, Vinícius José de, author.
- Conference Name:
- SAE Brasil 2025 Congress (2025-10-07 : Sao Paolo, Brazil)
- Language:
- English
- Physical Description:
- 1 online resource cm
- Place of Publication:
- Warrendale, PA SAE International 2025
- Summary:
- Automotive air conditioning systems are essential for ensuring thermal comfort for passengers. However, these systems require the elimination of refrigerants with high Global Warming Potential (GWP) and a transition toward more environmentally friendly alternatives. For many years, R134a has been the industry standard in automotive applications, following the phase-out of chlorofluorocarbons (CFCs) such as R12. This study evaluates the energy efficiency and environmental impact of several refrigerants in automotive air conditioning systems in tropical climates. A comprehensive literature review is conducted to select the refrigerants to be compared with R134a. The following is chosen: R1234yf, R744 (CO2), R290, R600a and R152a. Then a mathematical model is prepared and validated. The deviation between the results presented by the mathematical model and those in the literature varies from -1.21% to 8.33%. The simulation results suggest that the Coefficient of Performance (COP) of R152a and R600a is approximately 3% higher than that of R134a. However, these fluids are flammable, requiring additional safety investments. While R1234yf shows a slight loss in efficiency, at almost 4% lower than R134a, it offers a degree of compatibility due to its similar overall properties. The performance of R290 is slightly worse, while that of R744 is significantly lower. Finally, the environmental analysis based on TEWI indicates that R152a and R600a result in a slightly lower impact compared to R134a. In contrast, R290 and R1234yf exhibit a slightly higher environmental impact than R134a
- Notes:
- Vendor supplied data
- Publisher Number:
- 2025-36-0143
- Access Restriction:
- Restricted for use by site license
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