Kyushu University Academic Staff Educational and Research Activities Database
Researcher information (To researchers) Need Help? How to update
Tachikawa Yuya Last modified date:2021.07.15

Assistant Professor / Hydrogen Utilization Engineering
Department of Mechanical Engineering
Faculty of Engineering


Graduate School
Other Organization


Homepage
https://kyushu-u.pure.elsevier.com/en/persons/yuya-tachikawa
 Reseacher Profiling Tool Kyushu University Pure
http://www.mech.kyushu-u.ac.jp/~hup/index_en.html
Hydrogen utilization process laboratory .
Academic Degree
Ph.D. Eng.
Country of degree conferring institution (Overseas)
No
Field of Specialization
Energy analysis, fuel cell, mechanical engineering, numerical analysis
Total Priod of education and research career in the foreign country
00years00months
Research
Research Interests
  • water electrolysis and co-electrolysis
    keyword : Electrolysis
    2017.03.
  • Development of power generation system for carbon free energy
    keyword : Carbon free, power generation
    2015.04.
  • In-situ visualization of electrochemical reaction on SOFC electrode
    keyword : SOFC, visualization, image analysis technique
    2013.04.
  • Development of highly efficient SOFC system
    keyword : SOFC, efficiency, system analysis
    2014.04.
Academic Activities
Papers
1. K. Takino, Y. Tachikawa, K. Mori, S. M. Lyth, Y. Shiratori, S. Taniguchi, K. Sasaki, Simulation of SOFC performance using a modified exchange current density for pre-reformed methane-based fuels, International Journal of Hydrogen Energy, 10.1016/j.ijhydene.2019.12.089, 45, 11, 6912-6925, 2020.02, Numerical simulations can be used to visualize and better understand various distributions such as gas concentration and temperature in solid oxide fuel cells (SOFCs) under realistic operating conditions. However, pre-existing models generally utilize an anode exchange current density equation which is valid for humidified hydrogen fuels – an unrealistic case for SOFCs, which are generally fueled by hydrocarbons. Here, we focus on developing a new, modified exchange current density equation, leading to an improved numerical analysis model for SOFC anode kinetics. As such, we experimentally determine the exchange current density of SOFC anodes fueled by fully pre-reformed methane. The results are used to derive a new phenomenological anode exchange current density equation. This modified equation is then combined with computational fluid dynamics (CFD) to simulate the performance parameters of a three-dimensional electrolyte-supported SOFC. The new modified exchange current density equation for methane-based fuels reproduces the I–V characteristics and temperature distribution significantly better than the previous models using humidified hydrogen fuel. Better simulations of SOFC performance under realistic operating conditions are crucial for the prediction and prevention of e.g. fuel starvation and thermal stresses..