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Author Topic: Direct Air Capture (of Carbon Dioxide)  (Read 2478 times)

Bob Wallace

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Re: Direct Air Capture (of Carbon Dioxide)
« Reply #50 on: Today at 06:49:52 PM »
Floating solar islands to turn CO2 into alternate fuel:
https://weather.com/science/environment/news/2019-06-18-floating-islands-solar-carbon-methanol:
https://weather.com/science/environment/news/2019-06-18-floating-islands-solar-carbon-methanol

Sounds expensive.  More likely we'll see wind and solar electricity used for electrolysis to generate hydrogen which will then be converted into a more usable fuel form.

Having lived a few years floating on oceans I have an appreciation of how corrosive salt water can be.  Floating solar farms on fresh water is something entirely different.

rboyd

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Re: Direct Air Capture (of Carbon Dioxide)
« Reply #51 on: Today at 06:51:51 PM »
The Great Lakes covered in solar panels and wind turbines, the price of the future?

Bob Wallace

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Re: Direct Air Capture (of Carbon Dioxide)
« Reply #52 on: Today at 07:11:15 PM »
The Great Lakes covered in solar panels and wind turbines, the price of the future?

No, you hugely, hugely overestimate the amount of land required for a 100% RE future.  Some wind turbines not too far from major population centers (minimize transmission costs while minimizing aesthetic objections).  And no floating solar installation on large bodies of water subject to major storms and major ice events.


gerontocrat

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Re: Direct Air Capture (of Carbon Dioxide)
« Reply #53 on: Today at 08:31:30 PM »
The Great Lakes covered in solar panels and wind turbines, the price of the future?

No, you hugely, hugely overestimate the amount of land required for a 100% RE future.  Some wind turbines not too far from major population centers (minimize transmission costs while minimizing aesthetic objections).  And no floating solar installation on large bodies of water subject to major storms and major ice events.
One thing that Musk has got about right.

Quote
“If you wanted to power the entire United States with solar panels, it would take a fairly small corner of Nevada or Texas or Utah; you only need about 100 miles by 100 miles of solar panels to power the entire United States,” Musk said at at the event in Rhode Island. “The batteries you need to store the energy, so you have 24/7 power, is 1 mile by 1 mile. One square-mile.”

One of many visualisations that have failed to kick this misconception into the bin is attached
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

Bob Wallace

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Re: Direct Air Capture (of Carbon Dioxide)
« Reply #54 on: Today at 08:42:31 PM »
100 x 100 square miles of panels to supply the United States with all the energy it needs = 10,000 mi².

Area of the Great Lakes = 94,250 mi².