Researchers at Chalmers University of Technology in Sweden have projected that by 2045, the vast majority of air travel under 750 miles could be facilitated by hydrogen-powered aircraft. This development comes as part of efforts to decarbonize the aviation sector which has traditionally been challenging to address in terms of emissions. The study suggests that hydrogen-powered flights could potentially meet the needs of 97% of all intra-Nordic flight routes and 58% of the Nordic passenger volume by 2045. The research team focused on adapting existing aircraft models to run on hydrogen power, with a particular emphasis on innovative fuel tank designs and heat exchanger technology. These advancements are crucial in maintaining the efficiency and practicality of hydrogen aviation. The study revealed that implementing a new fuel tank capable of holding super-cold liquid hydrogen, alongside a sophisticated heat exchanger system, could significantly reduce fuel consumption by almost 8% and enhance an aircraft's range by up to 10%. Heat exchangers play a pivotal role in this technology, enabling the transfer of heat between the supercool hydrogen and the engine. By utilizing waste heat from the exhaust gases to preheat the fuel before combustion, the system becomes more energy-efficient. The team at Chalmers has been dedicated to developing a novel type of heat exchanger tailored for hydrogen aviation, leveraging the low storage temperature of hydrogen to optimize engine performance. Associate professor Carlos Xisto highlighted the importance of temperature in fuel efficiency, emphasizing that even small increases in temperature can have significant impacts on reducing fuel consumption and enhancing range. The researchers envision a future where hydrogen, along with electricity and e-jet fuel, will power a significant portion of global aviation by 2050, contributing to a substantial reduction in carbon dioxide emissions in the industry. This shift towards hydrogen-powered flight represents a promising step towards a more sustainable and environmentally friendly aviation sector.