Recent comments in /f/news

MightyH20 t1_jaqk2c6 wrote

Reply to comment by hiles_adam in Universal Hydrogen Successfully Completes First Flight of Hydrogen Regional Airliner by tooch_my_gooch

Thanks for looking it up! Usefull information that this article has left out imo.

>Today’s 15-minute flight used about 16kg of gaseous hydrogen — half the amount stored in two motorbike-sized tanks within the passenger compartment.

That is interesting. 1 kilograms of hydrogen equals to 33.33 kWh of useable energy. This means the entire flight consumed only 533.28 kWh.

I wonder under what pressure the hydrogen was stored given the relatively small size of the tanks with the total capacity to hold 30 kilograms.

>for 15 minutes of flight a 747 burns 3600L of aviation fuel, or 2880kg

This could be correct though. I know that a 747 uses around 3 to 4 liters of kerosine every second! And shows the massive efficiency difference between both technologies. 3600 L of kerosine equals to 37,564 kWh.

However, the major difference is probably the weight of the planes and that a 747 uses jet engines whereas this was a smaller prop-plane.

Perhaps a better comparison would be a comparison to a standard propellor plane. According to "the internet" a standard propellor plane uses 900 gallons of kerosine an hour or 225 gallons per 15 minutes. That equals to 8888 kWh.

Conclusion

Hydrogen prop plane 15 minutes flight: 533 kWh energy (16kg of hydrogen) consumption.

Standard fossil prop plane 15 minutes flight: 8888 kWh energy (225 gallons of kerosine) consumption

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bactatank13 t1_jaqemif wrote

Reply to comment by ArtifexCrastinus in Universal Hydrogen Successfully Completes First Flight of Hydrogen Regional Airliner by tooch_my_gooch

> what pressure we can use to for our local airlines to get on the list?

When they resolve the energy problem regarding hydrogen. What government need to do now is continue to fund and pressure R&D into Green Air Travel. Personally I think we are at least two decades from scalable green air travel. Half of the time will be spent on researching and the other half will be spent proving to everyone it is as safe as ICE. The latter being the hardest part.

" 18 gigawatt-hours every day, equivalent to the full production of one typical nuclear plant of 900 MW. If, to ensure that hydrogen production actually reduces carbon emissions, the electricity is produced through solar power, 44 square kilometers of solar panels would be needed—a footprint representing three times the entire surface area of the Orly airport itself. " source:https://www.kearney.com/transportation-travel/article/-/insights/aviations-hydrogen-the-airport-challenge

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hiles_adam t1_jaqdn93 wrote

Reply to comment by MightyH20 in Universal Hydrogen Successfully Completes First Flight of Hydrogen Regional Airliner by tooch_my_gooch

>and two large hydrogen tanks with 30 kg of fuel. Beneath the plane’s right wing, an electric motor from magniX was being driven by the new hydrogen fuel cell from Plug Power.
>
>Today’s 15-minute flight used about 16kg of gaseous hydrogen — half the amount stored in two motorbike-sized tanks within the passenger compartment. Universal Hydrogen plans to convert its test aircraft to run on liquid hydrogen later this year.

Found this in another article because I was curious as well

for 15 minutes of flight a 747 burns 3600L of aviation fuel, or 2880kg o.o that sounds so wrong but thats what google is telling me

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