Civil aviation provides an essential transportation network that connects the world and supports global
economic growth. To maintain these benefits while meeting environmental goals, next-generation aircraft must
have drastically reduced climate impacts. Hydrogen-powered aircraft have the potential to fly existing routes
with no carbon emissions and reduce or eliminate other emissions.
This paper is a comprehensive guide to hydrogen-powered aircraft that explains the fundamental physics and reviews current technologies. We discussthe impact of these technologies on aircraft design, cost, certification, and environment. In the long term,
hydrogen aircraft appear to be the most compelling alternative to today’s kerosene-powered aircraft. Using
hydrogen also enables novel technologies, such as fuel cells and superconducting electronics, which could lead
to aircraft concepts that are not feasible with kerosene. Hydrogen-powered aircraft are technologically feasible
but require significant research and development. Lightweight liquid hydrogen tanks and their integration with
the airframe is one of the critical technologies.
Fuel cells can eliminate in-flight emissions but must become
lighter, more powerful, and more durable to make large, fuel cell-powered transport aircraft feasible. Hydrogen
turbofans already have these desirable characteristics but produce some emissions, albeit much less damaging
than kerosene turbofans. Beyond airframe and propulsion technologies, the viability of hydrogen aircraft hinges
on low-cost green hydrogen production, which requires massive investments in the energy infrastructure.
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- Source: https://energycentral.com/c/cp/hydrogen-power-aviation