Technology group Wärtsilä is part of a new research project exploring innovative technology for cleaner, more energy-efficient engines utilising a closed loop combustion cycle. The research will focus on the use of the inert gas argon to increase efficiency of balancing engines. The co-innovation project is run by the Integrated Hydrogen-Argon Power Cycle (iHAPC) consortium, led by the University of Vaasa, in partnership with Business Finland and a wide network of partners.
In the argon power cycle the combustion oxygen, present in the air fed to standard internal combustion engines, is replaced by an argon/oxygen mix. The research focuses on scaling up the power cycle to medium speed engines with full argon recovery. The use of argon enables a considerably higher thermodynamic efficiency owing to its properties.
When using hydrogen, oxygen and argon as input the only product from the process is water and the inert argon. Argon is recycled from exhaust to inlet forming a closed loop combustion cycle. Hydrogen and oxygen, the only inputs in the integrated Hydrogen Argon power cycle, are both products of electrolysis, which increases the overall efficiency of the power-to-hydrogen-to-power process.
Rasmus Teir, director of Sustainability & Future Plant Concepts at Wärtsilä Energy says: “We have the technologies needed to deliver a 100% renewable energy future. And our ambition must be to continuously innovate solutions that further improve affordability and sustainability. The argon power cycle is an innovative technology that has the potential to impact these factors positively.”
The most efficient engines run on gas today but are ready to be converted to sustainable fuels such as hydrogen when they are available at scale. With sustainable fuel production forecast to reach 38 million tonnes by 2030 (a third more than current demand) this transition is expected to be possible within the next decade.
The three-year project is part of the WISE (Wide and Intelligent Sustainable Energy) programme, led by Wärtsilä and funded by Business Finland, the official government agency for trade, investment promotion and innovation funding. The partners of the iHAPC project are University of Vaasa, University of Oulu, VTT Technical Research Centre of Finland, Parker Hannifin Manufacturing Finland Oy, Vahterus Oy, Vaisala Oyj and TotalEnergies.
Professor Maciej Mikulski from the University of Vaasa, the responsible leader of the iHAPC project, says: “The argon power cycle enables full valorisation of green hydrogen with unparalleled power generation efficiency. I see this as a potential breakthrough for the energy sector. With our expertise in fuel analytics, modelling and simulation, powertrain testing, and control development, we are well-equipped … to lead this project.”
