dr. S. Hajimolana (Yashar)

Assistant Professor

About Me

I am an assistant professor in Energy Technology within the Department of Thermal and Fluid Engineering. In 2010, I was awarded a BrightSparks Scholarship to complete my PhD on “Mathematical Modelling and Advanced Control of a Solid Oxide Fuel Cell” in the Chemical Engineering Department, University of Malaya, Malaysia. In 2013, I obtained the University Malaya Research Grant to work as a postdoctoral researcher, studying on thermal recovery and energy management strategies of fuel cells and energy storage integrated process systems using optimization and advanced controller aimed to emission reduction and energy planning. In 2015, I started working in Malaysia Innovation Hub as a director of clean energy technology. In 2016, I was appointed as a postdoctoral researcher at Delft University of Technology for two years, working on multiple Horizon2020 projects related to the energy systems integration, fuel cells/electrolysis and hydrogen technologies. For current research activities, please visit my group page: https://www.utwente.nl/en/et/tfe/research-groups/TE/research/subjects/Energy_Systems_Integration/


Engineering & Materials Science
Energy Storage
Solid Oxide Fuel Cells (Sofc)
Energy Consumption
Scenario Analysis


Research Focus:

  • Fuel cell and hydrogen systems: development of sustainable energy production through a range fundamental research, through modeling and experimental characterization of fuel cell and electrolysis cell components and research on system integration and demonstration. The aim is also to develop new and innovative smart energy system platforms based on fuel cells for different applications, such as stationary and transportation, including drones, ships, boats, heavy duty trucks and heating and cooling.
  • Power-to-X: Using renewable energy to synthesize valuable chemicals: Sector coupling can play a key role in the energy transition towards an energy system fueled by renewable energy sources. Surplus electricity can be stored in the form of chemicals through the co-electrolysis of H2O and CO2. This opens the possibility to decarbonize industrial heating, chemicals, and sectors such as transportation. However, there is a lack of understanding of the design and techno-economics of Power-to-X conversion pathways. We work on providing a Power-to-X roadmap for the decarbonization of chemicals and energy systems through the results from detailed modeling and techno-economic analysis of the electrosynthesis of chemicals. 
  • Integrated transportation and energy systems: The future transportation system will be more integrated with industries, smart buildings, energy grid and renewables, allowing for great opportunities to exploit these interconnections. For analyzing integrated mobility-energy systems a deep understanding of these interconnections and infrastructures is needed to support alternative fuels. Our aim is to explore system-level sustainable solutions for the transportation sector, including technology options to support the adoption of alternative fuel/electric vehicles and related infrastructure and the synergies between transportation and different energy sectors such as heat, gas and electricity. Our interests include developing strategic scenarios to explore the role of transportation in long-term energy futures.
  • Integrated Propulsion and Cooling Systems for Mobile Applications: The transport sector is responsible for 22% of CO2 emissions that significantly contributes to global warming. Greenhouse gas emissions from conventional diesel engine vapor compression refrigeration systems can be as high as 40% of the vehicle’s emissions. The aim is to develop the future of transport refrigeration-propulsion systems by developing applied advanced thermodynamic cooling cycle.


Pagani, G. , Acar, C. , & Hajimolana, Y. (2022). Green hydrogen for ammonia production – A case for the Netherlands. In I. Dincer, C. O. Colpan, & M. A. Ezan (Eds.), Proceedings of WHEC 2022 - 23rd World Hydrogen Energy Conference: Bridging Continents by H2 (pp. 240-242). International Association for Hydrogen Energy, IAHE.
Chakrabarti, B. K. , Hajimolana, Y. S., Ouygang, M., Rubio-Garcia, J., Singh, A. K., Xia, Y., Brandon, N. P., & Yufit, V. (2022). Efficient regenerative hydrogen/vanadium fuel cell using trichome-like electrodes for enhanced vanadium electrolyte utilization and its system integration. In I. Dincer, C. O. Colpan, & M. A. Ezan (Eds.), Proceedings of WHEC 2022 - 23rd World Hydrogen Energy Conference: Bridging Continents by H2 (pp. 833-835). (Proceedings of WHEC 2022 - 23rd World Hydrogen Energy Conference: Bridging Continents by H2). International Association for Hydrogen Energy.
Chakrabarti, B. K., Kalamaras, E., Ouyang, M., Liu, X., Remy, G., Wilson, P. F., Williams, M. A., Rubio-Garcia, J., Yufit, V., Bree, G. , Hajimolana, Y. S., Singh, A., Tariq, F., Low, C. T. J., Wu, B., George, C., & Brandon, N. P. (2021). Trichome-like Carbon-Metal Fabrics Made of Carbon Microfibers, Carbon Nanotubes, and Fe-Based Nanoparticles as Electrodes for Regenerative Hydrogen/Vanadium Flow Cells. ACS Applied Nano Materials, 4(10), 10754-10763. https://doi.org/10.1021/acsanm.1c02195
Chakrabarti, B. K., Kalamaras, E., Singh, A. K., Bertei, A., Rubio-Garcia, J., Yufit, V., Tenny, K. M., Wu, B., Tariq, F. , Hajimolana, Y. S., Brandon, N. P., John Low, C. T., Roberts, E. P. L., Chiang, Y. M., & Brushett, F. R. (2020). Modelling of redox flow battery electrode processes at a range of length scales: a review. Sustainable Energy and Fuels, 4(11), 5433-5468. https://doi.org/10.1039/d0se00667j
Venkataraman, V., Pérez-Fortes, M., Wang, L. , Hajimolana, Y. S., Boigues-Muñoz, C., Agostini, A., McPhail, S. J., Maréchal, F., Van Herle, J., & Aravind, P. V. (2019). Reversible solid oxide systems for energy and chemical applications – Review & perspectives. Journal of Energy Storage, 24, Article 100782. https://doi.org/10.1016/j.est.2019.100782
Other Contributions
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UT Research Information System

Google Scholar Link



I am involved in University Twente/Vrij Universiteit Amsterdam Bachelor Program Mechanical Engineering Semester 2 (Energy Transition and Sustainability):

  • Engineering Thermodynamics 
  • Project: focuses on analysis, development and optimization of a renewable energy system taking into account thermodynamics and life cycle analysis

University of Twente:

  • Energy and Heat Transfer for Second Year Bachelor Program Industrial Design Engineering
  •  Energy Conversion Technology (Fuel Cells) for Master Program Mechanical Engineering

Affiliated Study Programmes



Courses Academic Year  2023/2024

Courses in the current academic year are added at the moment they are finalised in the Osiris system. Therefore it is possible that the list is not yet complete for the whole academic year.

Courses Academic Year  2022/2023



Current Projects

Finished Projects

  • Improving methanol powered Solid Oxide Fuel Cell – Gas Turbine power units for Naval Support Vessels through fuel and heat recovery; The project cooperates with “Dutch Royal Navi”

  • System design and optimization of an electrolyser connected to a wind turbine; The project cooperates with “TNO”

Contact Details

Visiting Address

University of Twente
Faculty of Engineering Technology
Horst Complex (building no. 20)
De Horst 2
7522LW  Enschede
The Netherlands

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Mailing Address

University of Twente
Faculty of Engineering Technology
Horst Complex
P.O. Box 217
7500 AE Enschede
The Netherlands