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Axial flow electric motors with superconducting windings will have 3 times the power to weight of jet engines and would marry well with cryo hydrogen storage. The bottleneck is fuel cells, with much higher specific energy and energy density required for that system to work.
CSIRO finds hydrogen could reduce aviation emissions within 5 years
A new report from Australia’s national science agency CSIRO shows that clean hydrogen can significantly reduce aviation emissions with potential benefits seen within five years. The report, Opportunities for hydrogen in commercial aviation, which had technical input and funding from The Boein...
cujet: electric drive is not limited to 350mph. The Tupelov TU-114 achieved speeds of 540mph, similar to turbofan jets and used a turboprop with power to weight of a little over 3.8kw/kg. Radial flux electric motors have achieved 15kw/kg and will achieve 20kw/kg with superconducting windings. True, batteries aren't there yet but PEM fuel cells and cryo-compressed hydrogen are.
Wright Electric begins motor development program for 186-seat electric aircraft; 1.5MW motor, 3 kV inverter
Wright Electric announced the start of its electric propulsion development program for its flagship 186-seat electric aircraft, named Wright 1. In order to achieve the commercial flight capability of the Wright 1, Wright is engineering electrical systems at the megawatt scale by building a 1.5 ...
No mention in the analysis of the retirement of coal and petroleum carriers by 2050. Coal, oil and gas make up around 40% of global shipping, much of it becoming redundant if the world decarbonises as it needs to. https://chinadialogueocean.net/9192-global-shipping-industry-asset-stranding/
Study puts cost of decarbonizing shipping by 2050 at ~$1.4-$1.9T; largest investment needed in land-based systems
A new study by University Maritime Advisory Services (UMAS) and Energy Transitions Commission (ETC) prepared for the Global Maritime Forum for the Getting to Zero Coalition, estimates that the cumulative investment needed between 2030 and 2050 to halve shipping’s CO2 emissions amounts to approxi...
Coal, oil and gas comprise around 40% of maritime trade so the demise of that part of shipping alone would result in a huge reduction of it's emissions. Ammonia is already shipped all over the world so I don't see a problem with using it as fuel with the proper precautions.
I see hydrogen, split from ammonia using membrane technology, fueling Solid Oxide fuel cells, generating electricity for High Temperature Superconductor motors for future shipping. Hopefully, the same technology will replace fossil fuels in aviation even sooner.
Study: alcohol, biomethane and ammonia are the best-positioned fuels to reach zero net emissions for shipping; OPEX, not CAPEX challenge
A study by A.P. Moller - Maersk and Lloyds Register has found that the best opportunities for decarbonizing shipping lie in finding new sustainable energy sources. Based on market projections, the best positioned fuels for research and development into net zero fuels for shipping are alcohol, b...
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