<![CDATA[General Background Ambient temperature variations significantly influence the thermal performance of domestic refrigeration systems operating across residential and industrial sectors. Specific Background Elevated outdoor temperatures impose greater thermal loads on condensers, reducing heat rejection capability and lowering overall system efficiency. Knowledge Gap Limited empirical research exists on evaluating alternative refrigerants and optimizing wire-and-tube condenser surface areas under diverse hot climatic conditions. Aims This study experimentally evaluates the performance of traditional finned, few-finned, and no-finned condensers using R134a and R1234yf refrigerants at ambient temperatures of 20, 30, and 40°C. Results The traditional finned condenser consistently achieved the highest coefficient of performance, while R1234yf maintained stable operating characteristics despite lower overall efficiency compared to R134a. Novelty The research provides a comprehensive comparative assessment of condenser surface area configurations and alternative low-global-warming-potential refrigerants under controlled hot climate conditions. Implications These findings offer valuable guidance for optimizing domestic refrigerator designs in high-ambient temperature regions. Key Findings Highlights The traditional finned condenser consistently demonstrated superior thermal performance and higher energy efficiency than few-finned and no-finned designs across all tested ambient temperatures. Increasing the ambient temperature from 20°C to 40°C caused a reduction in cooling capacity and coefficient of performance while increasing compressor work due to higher condensing pressures. R1234yf exhibited more stable operating characteristics under varying ambient temperatures compared to R134a, confirming its potential as an environmentally friendly alternative despite its lower overall COP. Keywords Effect Of Ambient Temperature, Wire & Tube Condenser, Condenser Fins, R-1234yf, Condenser Performance]]>
