Design concept of the bionic wick: (a) schematic diagram of the working precept of a loop warmth pipe, (b) schematic diagram of a pure leaf sectional construction, (c) stomatal array on the abaxial floor of a Cinnamomum camphora leaf, (d) schematic cross-section of the bionic wick, and (e) schematic diagram of a finger-like pore array of the bionic wick. Credit score: Langmuir (2024). DOI: 10.1021/acs.langmuir.4c00434
A analysis workforce led by Prof. Ye Hong from the College of Science and Know-how of China has developed an alumina ceramic bionic wick with finger-like pores impressed by the stomatal array of pure leaves. Their analysis is published in Langmuir.
Because the efficiency of digital chips continues to enhance, their power consumption additionally will increase, posing new challenges for cooling methods. Loop warmth pipes (LHPs) are a compelling cooling resolution as a result of their excessive warmth switch functionality, antigravity warmth switch, and absence of shifting elements.
Nevertheless, the differing necessities for stream resistance and capillary drive 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 stream resistance, whereas smaller pores are mandatory to offer enough capillary drive for liquid suction.
To handle this dilemma, Prof. Ye Hong’s workforce drew inspiration from the stomatal construction of plant leaves. Utilizing section inversion tape casting, they efficiently developed an alumina ceramic bionic wick with finger-like pore constructions. These finger-like pores, just like the stomatal construction of plant leaves, successfully improve the gas-liquid interface space, permitting for the well timed expulsion of gaseous working fluids and lowering mass switch resistance.
Concurrently, the micron-sized pores across the finger-like pores present enough capillary drive 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 force and lowering flow resistancebut additionally provides a novel resolution for high-power-density digital chip cooling. It reveals potential utility worth in environment friendly thermal administration for aerospace, aviation, and microelectronics fields.
Extra data:
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
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Bio-inspired wick enhances digital chip cooling (2024, September 11)
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