Heat transfer and fluid flow characteristics in a plate heat exchanger filled with copper foam
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ORIGINAL
Heat transfer and fluid flow characteristics in a plate heat exchanger filled with copper foam Kitti Nilpueng 1 & Lazarus Godson Asirvatham 2 & Ahmet Selim Dalkılıç 3 & Omid Mahian 4 & Ho Seon Ahn 5 & Somchai Wongwises 6,7 Received: 21 January 2020 / Accepted: 14 July 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract A small plate heat exchanger filled with copper foam which can be applied for small scale electronic cooling is presented. The heat transfer coefficient and pressure drop of water flow inside a plate heat exchanger filled with copper foam (PHECF) are experimentally studied. The effect of copper foam pore density and water velocity on the optimum thermal performance is also presented. The experiment is performed with a Reynolds number ranging from 1200 to 2000 and copper foam pore density ranging from 30 to 50 pores per inch (PPI). The results show that the heat transfer coefficient and pressure drop increased when the water velocity and pore density increased. The heat transfer coefficient is enhanced by 20.23%, 29.37%, and 40.28% for PHECF with a pore density of 30 PPI, 40 PPI, and 50 PPI as compared to a plate heat exchanger. The total pressure drop of water flow inside PHECF is dominated by inertial drag pressure drop. Thermal performance of PHECF with 50 PPI is highest with the average thermal performance factor of 1.21. The Nusselt number and friction factor correlation of water flow inside plate heat exchanger filled with copper foam are also proposed for practical applications. Keywords Flow visualization . Heat transfer enhancement . Porous media . Metal foam
Nomenclature A cross-sectional area of the flow channel, m2 As heat transfer area, m2 cp,c specific heat at constant pressure of cold stream, J/ kg K cp,h specific heat at constant pressure of hot stream, J/ kg K DH hydraulic diameter of the flow channel, m Da Darcy number f friction factor
F g K ks hc hh LMTD L
* Somchai Wongwises [email protected]
4
School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an, China
1
Department of Power Engineering Technology, King Mongkut’s University of Technology North Bangkok, Bangsue, Bangkok 10800, Thailand
5
Department of Mechanical Engineering, Incheon National University, Incheon, Republic of Korea
6
2
Department of Mechanical Engineering, Karunya Institute of Technology and Sciences, Coimbatore, Tamil Nadu, India
Department of Mechanical Engineering, Faculty of Engineering, King Mongkut’s University of Technology Thonburi, Bangmod, Bangkok 10140, Thailand
3
Department of Mechanical Engineering, Faculty of Mechanical Engineering, Yildiz Technical University, Yildiz, Besiktas, Istanbul, Turkey
7
National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand
˙c m
inertial coefficient of PHECF gravitational acceleration, m/s2 permeability of PHECF aluminum plate thermal conductivity, W/m K cold stream heat transfer coefficient, W/m2 K hot stream heat transfer coefficient, W/m2 K logarithmic me
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