How is that relevant? The article was an economic comparison, not an ecological one.
For an ecological comparison half the numbers. Synthetic fuels are only twice as expensive as fossil jet fuel which should mostly be caused by the needed energy.
By 2019, fossil jet fuel production cost was $0.3-0.6 per L given a $50–100 crude oil barrel, while aviation biofuel production cost was $0.7-1.6, needing a $110–260 crude oil barrel to break-even.
I’m not really sure what point you’re trying to make here -
It’s not like rails are in any significant way displacing solar panels.
If one were motivated, you could use the same land for tracks and for solar panels by raising the solar panels above the tracks and catenaries, making double use of the land at the expense of having to build platforms for the panels.
Finally, solar energy can’t be used to transport passengers by plane since electric plane travel is not at a mass-market scale (nor is it even certain that they will ever be able to).
The costs of the platforms would significantly reduce the efficiency of the solar cells.
My point is that planes have the advantage of not needing tracks which come with costs. There are the maintenance costs and the costs of not using them otherwise. We shouldn’t be surprised if trains can’t compete on many connections.
The average per year is calculated from that number by roughly multiplying with 10 in Europe. I have looked that up and not multiplied by hours in a year.
There is also a hidden cost from the tracks.
A rail track of 3m for 100km used for solar cells would generate enough electricity to transport 37500 passengers per plane.
Solar cells generate 2kWp per 10 square meters, which are 2MWh per year which is 5kWh per day.
300ksqm generate 150MWh per day.
4l kerosine per pessenger per 100km are about 40kWh.
150MWh are enough for 37500 passengers.
It’s not renewable but influences the economics.
That’s the most idiotic calculation I’ve ever read since I came across the brain melting insanity of solar roadways
Could you explain why, please?
How many electrical planes have you seen?
Four. The only one I’ve seen with more than one seat had an endurance aloft of 50 minutes at 100 knots indicated.
How is that relevant? The article was an economic comparison, not an ecological one.
For an ecological comparison half the numbers. Synthetic fuels are only twice as expensive as fossil jet fuel which should mostly be caused by the needed energy.
https://en.m.wikipedia.org/wiki/Aviation_biofuel#Production
I’m not really sure what point you’re trying to make here -
It’s not like rails are in any significant way displacing solar panels.
If one were motivated, you could use the same land for tracks and for solar panels by raising the solar panels above the tracks and catenaries, making double use of the land at the expense of having to build platforms for the panels.
Finally, solar energy can’t be used to transport passengers by plane since electric plane travel is not at a mass-market scale (nor is it even certain that they will ever be able to).
The costs of the platforms would significantly reduce the efficiency of the solar cells.
My point is that planes have the advantage of not needing tracks which come with costs. There are the maintenance costs and the costs of not using them otherwise. We shouldn’t be surprised if trains can’t compete on many connections.
The amortized savings of having the tracks outweigh any opportunity costs introduced by the tracks taking up space.
Do you have any numbers?
2 kWp means 2 kilo watt peak. It’s the maximum they can produce and in no way the average.
You are right, I considered that.
The average per year is calculated from that number by roughly multiplying with 10 in Europe. I have looked that up and not multiplied by hours in a year.