Boiling Heat Transfer Characteristics of Noah-2100A and HFE-649 in Pin-Fin Microchannel Heat Sink

Hanying Jiang, Xiucong Zhao () and Meng Zhang ()
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Hanying Jiang: Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou 310027, China
Xiucong Zhao: Department of Mechanical Engineering, Yangzhou University, Yangzhou 225012, China
Meng Zhang: Department of Mechanical Engineering, Yangzhou University, Yangzhou 225012, China

Energies, 2024, vol. 17, issue 24, 1-17

Abstract: Noah-2100A and HFE-649, as two electronics fluorinated liquids (EFLs) with low saturation temperature, high safety, excellent insulation properties, and low environmental impact, are considered as replacements for the refrigerants with high Global Warming Potential (GWP), such as HFC-134a and HFC-245fa, in electronic cooling system. However, there is still a knowledge gap of boiling heat transfer for these two EFLs, especially in pin-fin microchannel. The effect of inlet temperatures, mass flow rates, and inlet vapor qualities on boiling heat transfer for two EFLs were studied experimentally in this paper. Overall, though the Noah-2100 has a higher pressure drop-in microchannel than HFE-649, Noah-2100A shows a higher overall thermal performance than HFE-649. Newly developed correlations of the Nusselt number (Nu) and pressure drop for two EFLs in a pin-fin microchannel heat sink were also presented. The proposed correlations can achieve a 10% and 11% mean average percentage error for Nu number and pressure drop.

Keywords: Noah-2100A; HFE-649; microchannel; heat transfer coefficient; pressure drop (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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