Current Affiliation Organization 【 display / non-display 】

Current Affiliation Organization 【 display / non-display 】

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Academic degree 【 display / non-display 】

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Published Papers 【 display / non-display 】

Published Papers 【 display / non-display 】

• Mist cooling lithium–ion battery thermal management system for hybrid electric vehicles

  Aoto Teranishi , Takuma Kurogi , Izuru Senaha , Shoichi Matsuda , Keita Yasuda

  Applied Energy     2024.06 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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  Battery Thermal Management System (BTSM) is essential for maintaining optimal operation conditions for hybrid electric vehicles (HEVs) and electric vehicles (EVs). This study aimed to propose an innovative impinging jet cooling BTMS for HEVs using mist cooling. The dilute mist completely evaporated to avoid the risk of external circuit failure or corrosion that could result from surface wetting. Impinging experiments were performed under the conditions where inflow air temperature, Ta,in, was 21.2 °C ≤ Ta,in ≤ 31.0 °C and initial humidity, φ, was 50.9 %RH ≤ φ ≤ 96.0 %RH. It was found that the target plate was cooled down by up to 0.8 K without surface wetting by adding 5.5 mg/s water mist to the air. Numerical analyses were performed under conditions ranging from 21.2 °C ≤ Ta,in ≤ 31.0 °C and 0.0 %RH ≤ φ ≤ 100.0 %RH. The results and discussion highlight the importance of the critical initial humidity, φcritical: the complete evaporative threshold. Deviation between the experimental and numerical results at a fixed inflow air temperature, Δφ, was −1.9 %RH ≤ Δφ ≤ 3.0 %RH. Δφ was within the range of measurement uncertainty U(φ) = 4.0 %RH. Thus, the experimental and numerical results were consistent within the experimental measurement uncertainty. As a result, φcritical tends to be high in the case of high inflow temperature. The mist cooling is a viable way of BTMS for HEVs without surface wetting due to its large cooling capacity that results in a 7.4 K cooling effect in a hot environment.

• Indoor Sea-algae Cultivation Technology and Welfare Employment Collaboration for Disabilities

  SENAHA Izuru, NAGAMATSU Kazunari, YAMAZAKI Rieko, YAMAKAWA Nobuo

  The Proceedings of the Tecnology and Society Conference ( The Japan Society of Mechanical Engineers )  2023 ( 0 ) 142   2023

  Type of publication: Research paper (scientific journal)

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  <p>In this study, we investigated and analysed issues related to the working environment and wages for employment of people with disabilities, particularly in the context of cooperation between agriculture and welfare. We also examined the possibility of a new business collaboration using the onshore seaweed farming technology developed by the Faculty of Engineering at the University of the Ryukyus. As a result, we proposed a sustainable social business model by building a cooperative system that introduces new stakeholders to the business model, where it has been difficult for people with disabilities to participate.</p>

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• Mathematical Modelling and Statistical Optimization of Fast Cultivation of Agardhiella subulata: Response Surface Methodology

  M S Islam, Izuru Senaha, Md. Matiar Rahman and Yoshifumi Yoda

  Energy Nexus ( ELSEVIER )  7   2022.07 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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  The production of algae within a short period has become an emerging issue among researchers due to its diversified usage. At the same time, researchers are working extensively on how to upsurge algae production using carbon dioxide. The motto of this study is to develop a fast algae production system utilizing carbon dioxide and employing mathematical as well as statistical analysis to optimize production. Response surface methodology (RSM) constructed on the central composite design (CCD) was applied to assess the potential contributions of cultivation time, irradiance light, and carbon dioxide concentration during the cultivation process. In addition, their interaction effects were evaluated in the cultivation period. In this study, the cultivation period was the most significant contributor to algae cultivation, followed by light and carbon dioxide. The highest A. Subulata of 0.24 g was attained with 418 μmol/m2/s, 7 days, and 19 mg/l for light intensity, cultivation time, and carbon dioxide concentration, respectively. The experimental data were analyzed using the modified Logistics, modified Gompertz, modified Schnute, and modified Richards models, and it was determined that the modified Logistics model fits the experimental data better than the other three models, as evidenced by the low values of RMSD (0.0286), AIC (-2.409), and BIC (-4.251) and high value of R² (0.98). Increasing algae production employing carbon dioxide will help to promote a sustainable environment and attain sustainable development goals (SDGs).

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• A study on heat transfer characteristics by impinging jet with several velocities distribution

  Diop S.N.

  Case Studies in Thermal Engineering ( Case Studies in Thermal Engineering )  26   2021.08 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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• Phase equilibrium condition measurements in carbon dioxide hydrate forming system coexisting with seawater

  Nakane R.

  Journal of Chemical Thermodynamics ( Journal of Chemical Thermodynamics )  152   2021.01 [ Peer Review Accepted ]

  Type of publication: Research paper (scientific journal)

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Other Papers 【 display / non-display 】

Other Papers 【 display / non-display 】

• Heat Transfer Enhancement Due to a Longitudinal Vortex Produced by A Single Winglet in A Pipe

  瀬名波出

      1900.01

   

• Heat Transfer Enhancement Due to a Longitudinal Vortex Produced by A Single Winglet in A Pipe

  瀬名波出

      1900.01

   

• 不足膨張噴流が衝突する平板上の温度および圧力分布(第1報,円形噴流が垂直に衝突する場合)

  瀬名波出

      1900.01

   

• Time-Spatial Characteristics of Heat Transfer and Flow in Duct with Turbulence Promoter Located at Various Duct Height

  瀬名波出

      1900.01

   

• Study on Time-spatial Characteristics of Heat Transfer by Visualization of InfraredImage and Dye Flow

  瀬名波出

      1900.01

   

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Presentations 【 display / non-display 】

Presentations 【 display / non-display 】

• Enhancement of Heat Transfer at Downstream of a Backward-Facing Step by Mist Flow

  Yoshitaka Miyafuji , Izuru Senaha ,Kenyu Oyakawa and Munehiko Hiwada

  Int. Conf on Jets, Wakes and Separated Flows  2008.09  -  2008.09 

• Flow Structure and Heat Transfer on Turbulence Field by Oscilating Flag

  Izuru Senaha, Ryota Yamashiro, Masaaki Ishikawa and MD. Didarul Islam

  Int. Conf on Jets, Wakes and Separated Flows  2008.09  -  2008.09 

Grant-in-Aid for Scientific Research 【 display / non-display 】

Grant-in-Aid for Scientific Research 【 display / non-display 】

• Grant-in-Aid for Young Scientists(B)

  Project Year: 2003.04  -  2005.03 

  Direct: 3,300,000 (YEN)  Overheads: 990,000 (YEN)  Total: 4,290,000 (YEN)

SDGs 【 display / non-display 】

SDGs 【 display / non-display 】