CFD Analysis of the Impact of Temperature Variation on Condensation and Phase Transition Performance in Heat Exchangers

Authors : Fuat Tan, Hamid Orhun Tur

Pages : 80-93

Doi:10.46578/humder.1646589

View : 65 | Download : 38

Publication Date : 2025-06-30

Article Type : Research Paper

Abstract :This study investigates condensation in a rectangular copper heat exchanger with six circular tubes exposed to temperature variations. Three different temperature levels (380 K, 420 K and 460 K) were compared by examining heat transfer and phase change over a 5-second period with 1.25 s increments. A transient two-dimensional analysis model was developed. Physical modeling was performed using the Volume of Fluid (VOF) phase model and the Standard k-ε turbulence model. The analysis results were monitored along two horizontal lines at different heights on the plate. The simulation results show that rapid condensation occurs at low and medium temperature levels due to high heat transfer. At the high temperature level, a delayed phase change leads to a longer condensation duration. The study serves as a guide for thermal device design by emphasizing the need to select appropriate temperature ranges while considering both the amount and duration of condensation.
Keywords : CFD, Faz Değişimi, Isı Eşanjörü, Sıcaklık, Yoğuşma

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