A analysis staff led by Prof. Ye Hong from the College of Science and Expertise of China has developed an alumina ceramic bionic wick with finger-like pores impressed by the stomatal array of pure leaves. Their analysis is printed in Langmuir.
Because the efficiency of digital chips continues to enhance, their energy consumption additionally will increase, posing new challenges for cooling methods. Loop warmth pipes (LHPs) are a compelling cooling answer attributable to their excessive warmth switch functionality, antigravity warmth switch, and absence of shifting elements.
Nevertheless, the differing necessities for movement resistance and capillary pressure make designing the pore construction of the capillary wick inside an LHP difficult. Particularly, bigger pores are wanted for gaseous working fluids to cut back movement resistance, whereas smaller pores are vital to offer ample capillary pressure for liquid suction.
To handle this dilemma, Prof. Ye Hong’s staff drew inspiration from the stomatal construction of plant leaves. Utilizing part inversion tape casting, they efficiently developed an alumina ceramic bionic wick with finger-like pore buildings. These finger-like pores, much like the stomatal construction of plant leaves, successfully enhance the gas-liquid interface space, permitting for the well timed expulsion of gaseous working fluids and decreasing mass switch resistance.
Concurrently, the micron-sized pores across the finger-like pores present ample capillary pressure to replenish liquid on the gas-liquid evaporation interface. Begin-up and operation assessments of the LHP confirmed the superior warmth and mass switch efficiency of the bionic wick.
This work not solely resolves the battle between enhancing capillary pressure and decreasing movement resistance, but in addition affords a novel answer for high-power-density digital chip cooling. It reveals potential utility worth in environment friendly thermal administration for aerospace, aviation, and microelectronics fields.
Extra info:
Kai Xu et al, Superior Warmth and Mass Switch Efficiency of Bionic Wick with Finger-like Pores Impressed by the Stomatal Array of Pure Leaf, Langmuir (2024). DOI: 10.1021/acs.langmuir.4c00434
College of Science and Expertise of China
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Bio-inspired wick enhances digital chip cooling (2024, September 11)
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