The next big thing - energy exports? (18 Aug, 2020)

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The next big thing - energy exports? (18 Aug, 2020)

Postby aardvark_admin » Tue Aug 18, 2020 7:15 am

This column is archived at: https://aardvark.co.nz/daily/2020/0818.shtml

Could Australia pull this off?

Might filling the outback with PVAs and then exporting the power they generate over to SE Asia really be a viable proposition?

Or are there too many "gotchas" in the details?

How could the fill in the gaps, given that solar is at beast a periodic generator but demand will be fairly constant?
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Re: The next big thing - energy exports? (18 Aug, 2020)

Postby Ossified Location » Tue Aug 18, 2020 8:06 am

I think they might do better using the power to create high value products and export those instead.
https://helsinkismart.fi/portfolio-items/solar-foods-makes-food-out-of-thin-air/
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Re: The next big thing - energy exports? (18 Aug, 2020)

Postby Malcolm » Tue Aug 18, 2020 8:15 am

I saw a similar proposal for North Africa and a HVDC undersea cable (or series of cables) to mainland Europe. I think it was considered technically feasible but the political will and the capital to do it were what was missing.
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Re: The next big thing - energy exports? (18 Aug, 2020)

Postby ffirman » Tue Aug 18, 2020 12:38 pm

There will likely be a distance for a cable where the efficiency loss means that it is near to the efficiency of making hydrogen or methane and using them to transport the energy.

At least if it has been stored in to a energy carrier like that then having it available when required is solved.

Electricity -> Hydrogen -> Electricity is about 40%
Electricity -> Methane -> Electricity is about 35%.
(Source : https://en.wikipedia.org/wiki/Power-to- ... owerplants.)

This doesn't take in to account the transport of the compressed or liquefied gas, and here methane as a liquid is about 2 times more dense, so could tip the scales by taking 3 times the amount of energy for the same trip. Or the transport costs are then 1/2 of using hydrogen.

Hydrogen = 2.8kwh/l
Methane = 6.2kwh/l
Lithium Iron = 0.5kwh/l

Source (https://en.wikipedia.org/wiki/Energy_density)

Now if we had some room temperature super conducting cables, then the losses would basically be zero, though would still have the issue of supply at night etc.

Cheers
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Re: The next big thing - energy exports? (18 Aug, 2020)

Postby Perry » Tue Aug 18, 2020 3:23 pm

I hear that Arabs use dried camel dung for energy for water heating.
Could we export politicians' dried oral dung for similar purposes? :twisted:
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Re: The next big thing - energy exports? (18 Aug, 2020)

Postby aardvark_admin » Tue Aug 18, 2020 3:54 pm

Perry wrote:I hear that Arabs use dried camel dung for energy for water heating.
Could we export politicians' dried oral dung for similar purposes? :twisted:

Although I believe that the politician's product should produce many hours of top quality heat, the fact is that it just does not deliver on its promises (but then we should have already known that) :lol:
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Re: The next big thing - energy exports? (18 Aug, 2020)

Postby phill » Tue Aug 18, 2020 5:19 pm

making enough for there own use is the first hurdle

not sure an undersea cable is a great idea .. it has to go over one of the most actives plate boundaries on the planet

conversion to methane brings carbon into the equation
hydrogen not so much

for the immediate future solid storage ( battery ) is out of the mix
but things change
huge batteries are a required thing now
that means research into making one
( ,,,,,,,, ....... A E I O U use em sparingly theres probably not enough )

i might live and eat in a sewer .. but hey look how many of these shiny things i have got
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Re: The next big thing - energy exports? (18 Aug, 2020)

Postby cjet » Tue Aug 18, 2020 8:58 pm

Thorium is 1,000,000 times the energy density that carbon hydrogen bond

And as plentiful as Pb

So look at every lead acid battery volume

Then multiply that volume by one million

Think a gallon of petrol multiplied by one million

That is thorium

It is a shame that the next 500,000 years of human history can’t be imagined

Thorium power. In molten Fluride salt reactor.
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