Kyushu University Academic Staff Educational and Research Activities Database
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Yasuyuki Takata Last modified date:2020.10.09

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 Reseacher Profiling Tool Kyushu University Pure
Thermofluid Physics Laboratory .
Academic Degree
Doctor of Engineering
Field of Specialization
Thermal Engineering
Outline Activities
1. Effect of Surface Wettability on Phase Change Phenomena
2. Study on Microrefrigerator ans Micro Heat Transfer Device
3. Thermophysical Properties of Hydrogen at Extremely High Pressures
4. Water Cooling of Hot Surfaces
5. Cooling Stability of Superconductors
6. Numerical Analysis of Heat and Fluid Flow with Phase Change at Liquid-Vapor Interface
7. Thermodynamic Analysis of Advanced Power Cycles

Undergraduate Course: Thermodynamics, Heat Transfer
Graduate School: Advanced Thermodynamics

[Social Activities]
Research Interests
  • Hydrogen Thermophysical Properties at High Pressures
    keyword : Thermophysical Property, Hydrogen, High Pressure
    2006.07Hydorgen Thermophysical Properties at Ultra High Pressure.
  • Joule-Thomson Micro-cooler
    keyword : JT cooler, MEMS
    2002.04Joule-Thomson Micro-cooler.
  • Effect of Surface Wettability on Liquid-Vpaor Phase Change
    keyword : Contact angle, Evaporation, Liquid drop
    2000.01Enhancement of Evaporation by Plasma-irradiation.
  • Development of Program Package of Thermophysical Properties of Fluids: PROPATH
    keyword : Thermophysical property, Database
    1984.03Program Package for Thermophysical Properties of Fluids.
  • Heat Transfer Enhancement of Boiling and Evaporation by Superhydrophilic Photocatalyst
    keyword : TiO2, Contact angle, Boiling, Condensation, Superhydrophilicity
    1996.03Heat Transfer Enhancement of Boiling and Evaporation by Superhydrophilic Photocatalyst.
Academic Activities
1. M. J. Assael, J.-A. M. Assael, M. L. Huber, R. A. Perkins, and Y. Takata, Correlation of the Thermal Conductivity of Normal and Parahydrogen from the Triple Point to 1000 K and up to 100 MPa, Journal of Physical and Chemical Reference Data, 10.1063/1.3606499, 40, 3, 033101, 2011.07.
2. N. Sakoda, K. Shindo, K. Shinzato, M. Kohno, Y. Takata, and M. Fujii, Review of the Thermodynamic Properties of Hydrogen Based on Existing Equations of State, International Journal of Thermophysics, 31, 2, 276-296, 2010.02.
3. Y. Takata, S. Hidaka, A. Yamashita and H. Yamamoto, Evaporation of Water Drop on a Plasma-irradiated Hydrophilic Surface, International Journal of Heat and Fluid Flow, 10.1016/j.ijheatfluidflow.2003.11.008, 25, 2, 320-328, Vol.25, No.2, pp.320-328, 2004.04.
4. Y.Takata, S.Hidaka, J.M.Cao, K. Tanaka, M.Masuda, T.Ito, T.Watanabe, M.Shimohigoshi, Boiling and Evaporation from a Superhydrophilic Surface, Thermal Science & Engineering, Vol.8, No.6, pp.33-41, 2000.11.
5. Y.Takata, K.Iwashige, K.Fukuda, S.Hasegawa, Three-Dimensional Natural Convection in an Inclined Cylindrical Annulus, International Journal of Heat and Mass Transfer, Vol. 27, No. 5, pp.747-754, 1984.05.
6. Y.Takata, K.Fukuda, S.Hasegawa, K.Iwashige, H.Shimomura, K.Sanokawa, Three-Dimensional Natural Convection in a Porous Medium in a Vertical Curved Annulus, Numerical Heat Transfer, Vol. 6, No.1, pp.29-39, 1983.01.
Works, Software and Database
1. PROPATH: A Program Package for Thermophysical Properties of Fluids.
1. Yasuyuki Takata, Thermal Problems of Hydrogen at High Pressures, Asian Thermophysical Properties Conference(ATPC2019), 2019.10, Hydrogen is a promising energy career in the future carbon-neutral society. In December 2014, Toyota motors has started to sell a commercial fuel cell vehicle (FCV) into Japanese market and has been increasing its production year by year. In order to disseminate the FCVs, the hydrogen refueling station (HRS) should be placed everywhere in the society. There are about 90 HRSs in Japan as of January 2019.
The current FCV has 5kg of hydrogen at 82MPa in tank pressure. Therefore, the HRS has to handle hydrogen with higher pressure up to 100MPa to refill it to FCVs. Currently, the charging time to fill up the H2 tank is expected to be 3 min or shorter. However, such a rapid refueling process causes temperature rise in the H2 tank by adiabatic compression. The limit temperature of the H2 tank is 85C because of the melting point of a bonding agent for carbon fibers of the tank. To avoid undesirable temperature rise, the recent HRSs are equipped with a precooling device that cools the hydrogen down to -40C in advance. However, this precooling process causes the other problems. One is the overcharge of hydrogen.
Since the hydrogen gas at low temperature is injected into tank up to target pressure at the end of refueling process, the tank pressure increases gradually due to heat transfer from the surrounding. This pressure rise by heat transfer sometimes exceeds the limit pressure of the tank. The second problem is a frost formation around the injection nozzle and the receptacle. Sometimes, ice is formed and the hydrogen nozzle is stuck to the receptacle. For safety operations of HRS, these thermal problems must be solved.
Our research effort is devoted to the first problem. To ensure the safety of FCVs during refueling hydrogen, transient pressure and temperature in tank should be predicted with sufficient accuracy. The first step is to collect accurate thermophysical property data for hydrogen in a wide range of pressures and temperatures. We have been measuring thermodynamic and transport properties of hydrogen up to 100MPa and 500C to develop a reliable database. Based on this hydrogen thermopysical proerty database, we have been developing a useful software for dynamic simulation of HRS which predicts flow rate, temperatures and pressures of HRS and H2 tank of FCV. Some typical thermo-technical problems with hydrogen refueling process are introduced in the presentation..
2. Yasuyuki Takata, Biao Shen, Sumitomo Hidaka, Koji Takahashi, The Role of Hydrophobicity on Early Onset and Enhancement of Nucleate Boiling, 6th Nano and Micro Flows Conference, 2018.09, Wettability effect is one of the key parameters that influences boiling characteristics. The present study reveals the role of hydrophobicity in relation to the effect of dissolved air in liquid water. The hydrophobicity works as an excellent nucleation site and, therefore, by making use of biphilic surface the nucleate boiling is significantly enhanced. The boiling performance of biphilic surface is of about 6 times larger than that of mirror copper surface in subatmospheric condition. The effect of dissolved air on the onset of nucleate boiling (ONB) has been made clear by making use of a special experimental apparatus that can remove air from boiling water. It was found that the dissolved air assists early onset of boiling and enhances boiling performance..
Membership in Academic Society
  • The Japan Society of Mechanical Engineers
  • Heat Transfer Society of Japan
  • Japan Society of Thermophysical Properties
  • The Iron and Steel Institute of Japan
  • Cryogenic Society of Japan
  • Atomic Energy Society of Japan
  • Photo Functionalized Materials Society
  • Outstanding Paper Award: 14th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics(HEFAT2019)
  • Significant Contribution Award: 12th Asian Thermophysical Properties Conference
  • ASME ICNMM Outstanding Leadership Award: This award recognizes a person whose service within the ICNMM is exemplary; the recipient of the award contributed significantly to the lasting success of the conference. Nominations are limited to professionals who have been involved for at least three years with the conference.
  • The JSME Medal for Outstanding Paper: Thermodynamic Behavior of Hydrogen Binary Systems with Critical Curve Divergence and Retrograde Condensation, Journal of Thermal Science and Technology, Vol.8, No.3, 2013 November
  • The JSTP Best Paper Award: Awarded by the Japan Society of Thermophysical Properties
  • JSME Thermal Engineering Achievement Award: Awarded by the Thermal Engineering Division, the Japan Society of Mechanical Engineers
  • The JSTP Award for Outstanding Achievement: Awarded by the Japan Society of Thermophysical Properties for development of PROPATH: A computer program package for thermophysical properties of fluids.
  • Best Poster Presentation Award: Awarded by the 11th International Heat Transfer Conference
  • Heat Transfer Society Award for Scientific Contribution: Awarded by the Heat Transfer Society of Japan for article entitled “Boiling and Evaporation from a Superhydrophilic Surface” published in Thermal Science & Engineering, Vol.8, No.6
Educational Activities
[Graduate School] Heat and Mass Transfer, Advanced Thermal ENgineering, Hydrogen Energy Engineering, Clean Energy Technologies

[Undergraduate Course] Engineering Thermodynamics, Heat Transfer Engineering
Other Educational Activities
  • 2004.05.
  • 2005.01.
  • 2003.06.
Professional and Outreach Activities
Regional Associate Editor of "Applied Thermal Engineering" since March 2006.