In a bid to revolutionize air travel and combat aviation's carbon footprint, GE Aerospace is setting its sights on hybrid engines for the next generation of single-aisle jets. This technology, targeted for commercial use by the mid-2030s, has the potential to significantly reduce emissions in an industry heavily reliant on single-aisle workhorses. While hybrid cars have become commonplace, decarbonizing the aerospace industry presents a far steeper challenge. GE's proposed solution combines traditional jet fuel, or even sustainable alternatives, with electric power. Initial estimates suggest this hybrid approach could cut fuel consumption by up to 5%.
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The technology hinges on embedding electric motors or generators within a high-bypass turbofan engine, the workhorse of modern commercial jets. This collaborative effort with NASA involves modifying a Passport engine to integrate these hybrid components. The project, known as the Hybrid Thermally Efficient Core (HyTEC), is just one piece of the puzzle for GE. They are also collaborating with Boeing on a separate program, the Revolutionary Innovation for Sustainable Engines (RISE), which aims for ground and flight tests of a hybrid electric system on a modified Saab aircraft later this decade.
GE has already achieved several milestones in developing this hybrid propulsion system. In 2016, they conducted a successful ground test of an electric motor-driven propeller. More recently, they completed the world's first test of a megawatt-class, high-voltage hybrid electric system at simulated cruising altitudes for single-aisle jets.
This innovative technology is not without its hurdles. Integrating electric components into existing engine architectures necessitates significant engineering advancements. Additionally, the weight and storage capacity of batteries onboard remain crucial factors for long-haul flights. Despite these challenges, GE's commitment to hybrid engine development represents a significant step towards a greener future for aviation. If successful, this technology could pave the way for cleaner skies and a more sustainable air travel industry.