The heat transfer and flowing resistance characteristics of air flow crossing over pin finned tube heat exchanger was studied numerically and experimentally. The purpose of this study is to improve the heat transfer characteristics of a pin finned-tube for better performance. A plain and solid pin finned tube heat exchanger models were fabricated and used to examine the heat transfer coefficient enhancement. In the numerical study, the finite volume mesh generation was performed using ANSYS Design modular and Fluent 18.0. Plain, solid and perforated pin finned tubes were studied numerically. The experimental results showed that Nusselt number is approximately 27% higher than that of the plain tube, while, the pressure drop value is 17% higher than that of the plain tube. The numerical results showed that perforated finned tube provides a good reduction in surface temperatures. The use of perforated pin finned tube results in increasing Nusselt number by 26% and increasing pressure drop by 22% in comparison with solid pin finned tube. A comparison between the numerical and experimental results showed a good agreement between them. Finally, correlation equations were developed for the heat transfer and friction factor.
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