Projects | Wentao Chen

Cooling for photovoltaic cell with self-cleaning coating

Sun, 01 Dec 2024 00:00:00 +0000

This collaborative program aims to enhance global partnerships. It focuses on merging self-cleaning coating technology for solar panels, an area of expertise for partner organizations, with cooling technology, a specialty of the Japanese team. Progress will be monitored through online meeting, while hands-on experiments will be conducted using cutting-edge equipment during in-person exchanges. Visiting researchers will receive training on advanced measurement tools, and those sent abroad will engage in interdisciplinary research projects. This initiative promotes bilateral exchange of emerging talent and fosters stronger ties between institutions.

Link: https://www.jst.go.jp/aspire/nexus/y-tec/theme/2024/vol043.html

Enhancement of global engineering education in mechanical engineering field through PBL

Mon, 01 Apr 2024 00:00:00 +0000

This exchange plan aims to increase interest in Japanese cutting-edge science and technology in the field of mechanical engineering through research seminars, laboratory visits, and cooperative learning activities, to create an environment that facilitates short- and long-term study at Kyutech, and to promote GE education and internationalization of Kyutech at the same time. To deepen research exchanges through research seminars and laboratory visits, and to build a system that facilitates joint research and ongoing research exchanges. In the experimental cooperative learning activities, GE course students can obtain credits for at least 60 hours of activities equivalent to online study abroad, which is appropriate and effective for the purpose and objectives of the above exchange plan.

Link: https://www.jst.go.jp/pr/info/info1706/index.html

Exploration of quasi-Casimir coupling induced phonon heat transfer mechanism by deep learning

Mon, 01 Apr 2024 00:00:00 +0000

As part of the global climate change response, advanced thermal management techniques at the nanoscale are required to achieve high energy conversion efficiencies. The applicant has discovered a thermal resonance phenomenon through quasi-Casimir coupling, in which two solids sandwiched in a vacuum nanogap of several molecular layers realize phonon transport only through intermolecular interactions. This new phonon heat transfer mechanism is characterized by the fact that it does not require an electromagnetic field, since the phonon transport is induced by quasi-Casimir coupling between two solid surfaces. In other words, only phonons are allowed to transmit and not electrons, which makes the heat transfer efficiency higher than that of near-field thermal radiation or Casimir heat transfer. The aim of this study is to clarify the principles of innovative nanoscale thermal management techniques for ultra-small localized regions based on the phonon heat transfer mechanism induced by quasi-Casimir coupling in the nanogap through molecular dynamics simulations and deep learning.

Thermal resonance induced by quasi-Casimir coupling for innovative nanoscale thermal management

Wed, 31 Aug 2022 00:00:00 +0000

Phonon heat transfer can be induced by quasi-Casimir coupling due to molecular interaction across a nanogap without electromagnetic fields. However, the quasi-Casimir coupling between the nanostructures and adsorbed water layers on the solid surfaces is still open for question. Therefore, we will verify phonon transmission across a nanogap via nanostructures and adsorbed water layers, focusing on quasi-Casimir coupling and thermal resonance.

Link: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-22K20412/

Innovative nanoscale thermal management by quasi-Casimir coupling induced phonon transport

Thu, 30 Jun 2022 00:00:00 +0000

Thermal resonance phenomenon by quasi-Casimir coupling has been discovered, in which phonon transport is realized by only intermolecular interactions between two solids sandwiched by a vacuum nanogap of a few molecular layers. Based on the quasi-Casimir coupling induced phonon heat transfer in the nanogap, this study aims to clarify the principle of innovative nanoscale thermal management technology in the ultra-small local region by both molecular dynamics simulations and experiments.

Link: https://kaken.nii.ac.jp/ja/grant/KAKENHI-PROJECT-22K18773/

Solid-liquid-vapor interfacial transport phenomena coupled with wetting/condensation/evaporation

Fri, 01 Apr 2022 00:00:00 +0000

Highly efficient energy conversion and utilization technologies are closely related to phase change phenomena such as macroscopic condensation, evaporation, and boiling through the solid-liquid-vapour interface. On the other hand, the effect of interfacial resistance due to the properties of the heat transfer surface relatively increases as the representative dimensions of the target system become smaller with the development of nano- and micro-technologies. In this study, we develop a microscopic heat and mass transfer model that takes into account the interfacial resistance at the solid-liquid-vapour interface.

Link: https://kaken.nii.ac.jp/ja/grant/KAKENHI-PROJECT-23K22687/

Solid-liquid-vapor interfacial resistance related multiphysis of tribology

Sun, 01 Apr 2018 00:00:00 +0000

Scale effect of the interfacial resistance at solid－liquid－vapor interface increases as increasing the characteristic length scale of the system, which might induce a significant deviation in microsystems from the classical heat transfer theory for macrosystem. In this study, the correlation between the interfacial resistance and the thermal/wetting/electrochemical properties at solid－liquid－vapor interface has been studied. The effects of interfacial resistances on thermal elastohydrodynamic lubrication were investigated to clarify the temperature rise and film thickness reduction of tribological surfaces under point contact.

Link: https://kaken.nii.ac.jp/ja/grant/KAKENHI-PROJECT-18H01385/