Töre, HKılıçarslan, A2026-03-312026-03-3120250140-70071879-2081http://dx.doi.org/10.1016/j.ijrefrig.2025.08.006https://hdl.handle.net/11491/9566The investigation of condensation phenomenon in industrial vapor compression refrigeration systems is significant due to the determination of optimum condenser area and condensation heat transfer efficiency. Previous studies in the literature have generally experimentally and/or numerically observed the condensation phenomenon in straight pipes or parallel pipe bundles. However, this study investigates the condensation phenomenon in an Industrial air-cooled finned tube condenser numerically. There is also a lack of literature investigating the condensation phenomenon along the pipe length of industrial air-cooled finned tube condensers as a function of air speeds, temperatures, and relative humidity conditions for different refrigerants, such as R134a, R1234yf, and R507a. The k-epsilon (k-epsilon) turbulence model and SIEMENS-FloEFD-v22.05 simulation software were used to model the condensation flow (two-phase flow) in the Computational Fluid Dynamics (CFD) analysis. As the temperature and relative humidity of the air passing through the condenser decreased or as the air speed increased, the length of the condenser pipe at which the refrigerants under study (R134a, R1234yf, and R507a) started to condense decreased. The smallest length of the condenser pipe at which condensation started (417 mm), in other words, the minimum area for condensation, was obtained using R507a as a refrigerant at a speed of 3.7 m/s, a temperature of 18.5 degrees C, and a relative humidity of 43 %.enCondensationCFDFinned tube condenserAir temperatureAir velocityRelative humidityArticle17910.1016/j.ijrefrig.2025.08.006WOS:001585629600001