Effects of metal foam on exergy and entropy of nanofluids in a heat sink applied for thermal management of electronic components
Corresponding Author
Cong Qi
Jiangsu Province Engineering Laboratory of High Efficient Energy Storage Technology and Equipments, China University of Mining and Technology, Xuzhou, China
School of Electrical and Power Engineering, China University of Mining and Technology, Xuzhou, China
Correspondence
Cong Qi, Jiangsu Province Engineering Laboratory of High Efficient Energy Storage Technology and Equipments, China University of Mining and Technology, Xuzhou 221116, China.
Email: [email protected]
Search for more papers by this authorTiantian Chen
Jiangsu Province Engineering Laboratory of High Efficient Energy Storage Technology and Equipments, China University of Mining and Technology, Xuzhou, China
School of Electrical and Power Engineering, China University of Mining and Technology, Xuzhou, China
Search for more papers by this authorJianglin Tu
Jiangsu Province Engineering Laboratory of High Efficient Energy Storage Technology and Equipments, China University of Mining and Technology, Xuzhou, China
School of Electrical and Power Engineering, China University of Mining and Technology, Xuzhou, China
Search for more papers by this authorYuying Yan
Fluids & Thermal Engineering Research Group, Faculty of Engineering, University of Nottingham, Nottingham, UK
Search for more papers by this authorCorresponding Author
Cong Qi
Jiangsu Province Engineering Laboratory of High Efficient Energy Storage Technology and Equipments, China University of Mining and Technology, Xuzhou, China
School of Electrical and Power Engineering, China University of Mining and Technology, Xuzhou, China
Correspondence
Cong Qi, Jiangsu Province Engineering Laboratory of High Efficient Energy Storage Technology and Equipments, China University of Mining and Technology, Xuzhou 221116, China.
Email: [email protected]
Search for more papers by this authorTiantian Chen
Jiangsu Province Engineering Laboratory of High Efficient Energy Storage Technology and Equipments, China University of Mining and Technology, Xuzhou, China
School of Electrical and Power Engineering, China University of Mining and Technology, Xuzhou, China
Search for more papers by this authorJianglin Tu
Jiangsu Province Engineering Laboratory of High Efficient Energy Storage Technology and Equipments, China University of Mining and Technology, Xuzhou, China
School of Electrical and Power Engineering, China University of Mining and Technology, Xuzhou, China
Search for more papers by this authorYuying Yan
Fluids & Thermal Engineering Research Group, Faculty of Engineering, University of Nottingham, Nottingham, UK
Search for more papers by this authorFunding information: Natural Science Foundation of Jiangsu Province, Grant/Award Number: BK20181359
Summary
To solve the high heat dissipation of the heat sink, a set of experimental device for the flow and heat transfer of the nanofluids through a heat sink filled with metal foam was established in this paper. The impacts of metal foam with diverse pore densities (PPI = 20, 30, 40), nanoparticle mass fractions (from β = 0.0 wt% to β = 0.5 wt%) and Reynolds numbers (Re = 414-1119) on the flow and heat transfer characteristics were investigated. In addition, the thermal and hydraulic properties were evaluated by the exergy efficiency and entropy generation. The conclusions displayed that the metal foam with a pore density (PPI = 40) is instrumental in strengthening the heat transfer under a certain porosity, and the heat sink under the working condition (β = 0.3 wt% and PPI = 40) possesses the best capacity of thermal performance. Nanofluids and metal foam (PPI = 40) can improve Nusselt number by 6.13% and 3.2% at most compared with water and metal foam (PPI = 20 and PPI = 30), respectively. Nanofluids with β = 0.3 wt% exhibit the highest exergy efficiency, and the metal foam with PPI = 40 shows the smallest entropy generation.
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