Thermal characteristics of tree-shaped microchannel nets with/without loops |
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| Authors: | Peng Xu X.Q. Wang A.S. Mujumdar C. Yap B.M. Yu |
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| Affiliation: | 1. Department of Mechanical Engineering, National University of Singapore, Singapore 117576;2. School of Physics, Huazhong University of Science and Technology, Wuhan 430074, P.R. China;1. School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China;2. Department of Mechanical Engineering, Chung Yuan Christian University, Chungli 32023, Taiwan;3. School of Power and Mechanical Engineering, Wuhan University, PR China;4. Department of Mechanical Engineering, University of California at Berkeley, CA 94720, USA;1. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing, Jiangsu, 210096, PR China;2. College of Electrical, Energy and Power Engineering, Yangzhou University, Yangzhou, 225127, PR China |
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| Abstract: | Several tree-shaped microchannel networks with/without loops are numerically examined and compared for application in cooling of electronic components. The physical model of microchannel electronic cooling system is set up with tree-shaped networks. The tree-shaped microchannel nets are embedded in a disk-shaped heat sink, which is attached to a chip to remove the heat dissipated by a chip. The effects of total branching level and loops on the thermal and flow performances of heat sink system are investigated numerically. Results show that tree-shaped nets with loops provide a great advantage when the structure experiences accidental damage to one or more channel segments since the loop assures continuity of coolant flow. Under blockage of some branches, the channel networks only experience an increase of pressure drop while maintaining the capability to remove the heat generated by the chip. |
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