2021 Fiscal Year Research-status Report
Creation of thermofluidic energy harvesting elements to surpass the solid-state thermoelectric energy conversion
| Project/Area Number |
21K18693
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| Research Institution | Kyushu University |
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Principal Investigator |
李 秦宜 九州大学, 工学研究院, 准教授 (60792041)
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| Co-Investigator(Kenkyū-buntansha) |
高橋 厚史 九州大学, 工学研究院, 教授 (10243924)
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| Project Period (FY) |
2021-07-09 – 2023-03-31
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| Keywords | 熱流体発電素子 / カーボンナノチューブ / ナノチャネル / グラフェン |
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| Outline of Annual Research Achievements |
In FY2021, mainly three studies have been implemented related to the energy harvesting with thermofluidics. First, we have developed a more accurate method to quantitatively characterize the slip flow in graphene nanochannels. To accurately measure the slip length in rectangular nanochannels, we developed a 3D capillary flow model that fully considers the nonuniform cross-section velocity profile, slip boundary conditions, as well as the dynamic contact angle. Using this measurement method, we have successfully measured the water slip length changing with the surface charge density. One related paper has been published in a well-recognized journal. Second, we have successfully measured the voltage generated by flow in an individual nanochannel. Third, we have successfully infused different fluids into a single carbon nanotube, which will be used for electrification tests.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
This project aims to elucidate the electrification phenomena with thermofluids using nanoscale measurements, and to provide guidance for the design of thermofluid-based energy harvesting devices. In FY2021, we have successfully fabricated nanoscale thermofluid devices, measured the flow characteristics, established the electrification measurement method and obtained the voltage generated by the thermofluid phenomena. Related results have been published in journals and reported in conferences.
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| Strategy for Future Research Activity |
In FY2022, we will first systematically study the thermofluid electrification phenomena in an individual nanochannel and elucidate the related physical mechanisms. Second, we will study the thermofluid electrification effects with individual low-dimensional materials.
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| Causes of Carryover |
次年度使用額が生じた理由:delayed maintenance of experimental equipment; cancelled collaboration, business trips and conferences due to COVID
使用計画:実験装置の維持費用、消耗品の購入、学会参加費と旅費、共同研究による人件費や謝金
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