Researchers at the University of Illinois are leading a newly funded project from NASA to develop a novel approach for all-electric aircraft.
Although improvements in vehicle configurations and engine systems have increased flight efficiency over the past few decades, the continued dependency on hydrocarbon fuels makes aircraft operation costs volatile. It also means that commercial aviation will continue to contribute a significant amount of greenhouse gas emissions across the national and international transportation industry. And the forecast for air travel in the United States is expected to increase 90 percent within the next 20 years, leading to even greater emissions.
In an effort to address these issues, this research proposes a fundamental shift away from jet fuel towards more sustainable energy sources for aviation, and the introduction of new electrically-driven propulsion systems for commercial aircraft systems.
It's called CHEETA—the Center for Cryogenic High-Efficiency Electrical Technologies for Aircraft. NASA will provide $6 million over the course of three years.
"Essentially, the program focuses on the development of a fully electric aircraft platform that uses cryogenic liquid hydrogen as an energy storage method," said Phillip Ansell, assistant professor in the Department of Aerospace Engineering at Urbana-Champaign and principal investigator for the project.
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"The hydrogen chemical energy is converted to electrical energy through a series of fuel cells, which drive the ultra-efficient electric propulsion system. The low temperature requirements of the hydrogen system also provide opportunities to use superconducting, or lossless, energy transmission and high-power motor systems.
"It's similar to how MRIs work, magnetic resonance imaging," Ansell added. "However, these necessary electrical drivetrain systems do not yet exist, and the methods for integrating electrically driven propulsion technologies into an aircraft platform have not yet been effectively established. This program seeks to address this gap and make foundational contributions in technologies that will enable fully electric aircraft of the future."
Forget cars. We need electric airplanes.
The co-principal investigator on the project is Associate Professor Kiruba Haran in U of I's Department of Electrical and Computer Engineering.
"Advances in recent years on non-cryogenic machines and drives have brought electric propulsion of commercial regional jets closer to reality, but practical cryogenic systems remain the 'holy grail' for large aircraft because of their unmatched power density and efficiency," Haran said. "The partnerships that have been established for this project position us well to address the significant technical hurdles that exist along this path."
Keeping current with electric vehicles. Odds are you don't find yourself sitting in traffic next to an electric vehicle (EV) very frequently, but that may soon change. According to a recent report from Bloomberg New Energy Finance, global sales from EVs are expected to grow from 1.1 million in 2017 to 11 million in 2025, rising to 30 million in 2025. Furthermore, the forecast states: "By 2040, 55% of all new car sales and 33% of the global fleet will be electric." Although Tesla is often the first mentioned when talk around the water cooler turns to EVs, plenty of traditional automakers are charged up about them as well. For example, General Motors announced last October its intent to launch at least 20 new all-electric vehicles by 2023 as it drives toward a future where it intends to solely produce zero-emission, all-electric vehicles. Volkswagen AG, moreover, also aspires to satisfy the growing demand for EVs; the company plans on offering customers electric versions of all the models in its portfolio by 2030.
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Provided by University of Illinois at Urbana-Champaign
Citation: NASA funds aviation research on a new fuel concept (2019, May 13) retrieved 13 May 2019 from https://phys.org/news/2019-05-nasa-funds-aviation-fuel-concept.html
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