International Research Journal of Innovations in Engineering and Technology - IRJIET International Open Access, Monthly, Peer Reviewed, Reputed Journal ISSN (online): 2581-3048

Impact Factor (2025): 6.9

DOI Prefix: 10.47001/IRJIET

Experimental Study of Thermal Performance of Air-Cooled Cross-Flow Heat Exchanger

Khoiri RoziMechanical Engineering, Diponegoro University, Jl. Prof. H. Soedarto, SH, Tembalang, Semarang 50275, IndonesiaBerkah Fajar TKMechanical Engineering, Diponegoro University, Jl. Prof. H. Soedarto, SH, Tembalang, Semarang 50275, IndonesiaDimas Gerald Ikhwanul MukminMechanical Engineering, Diponegoro University, Jl. Prof. H. Soedarto, SH, Tembalang, Semarang 50275, Indonesia

Vol 9 No 9 (2025): Volume 9, Issue 9, September 2025 | Pages: 30-33

International Research Journal of Innovations in Engineering and Technology

OPEN ACCESS | Research Article | Published Date: 19-09-2025

doi Logo doi.org/10.47001/IRJIET/2025.909005

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Abstract

This study aims to evaluate the effect of variations in Re_D and heating power on the thermal characteristics of a tube bundle. Tests were conducted using a test model with a channel cross-section of 150 mm × 150 mm and a length of 1540 mm, equipped with an air-driven fan and heating elements with varying power of 10 W, 20 W, and 30 W. The main parameters analyzed were the convection heat transfer coefficient (h) and the Nusselt number (Nu) as a function of Re_D and P. The results showed that increasing Re_D significantly increased h and Nu at all power levels, especially at high Re_D which produced maximum heat transfer due to the strengthening of turbulence effects. Increasing heating power also contributed to the increase in h and Nu, but the effect of Re_D was more dominant on the thermal performance of the system. The combination of high flow rates and large heating power was proven to maximize heat transfer efficiency in the tube bundle configuration.

Keywords

heat exchanger, tube bundle, Reynolds number, Nusselt number, heat transfer coefficient


Citation of this Article

Khoiri Rozi, Berkah Fajar TK, & Dimas Gerald Ikhwanul Mukmin. (2025). Experimental Study of Thermal Performance of Air-Cooled Cross-Flow Heat Exchanger. International Research Journal of Innovations in Engineering and Technology - IRJIET, 9(9), 30-33. Article DOI https://doi.org/10.47001/IRJIET/2025.909005

Licence Copyright (c) 2026 International Research Journal of Innovations in Engineering and Technology creative common licence This work is licensed under Creative common Attribution Non Commercial 4.0 Internation Licence
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