Elex from carnot-cycle to remove CO2 from resulting fluid flows

[James Bowery]

Benthic and tropopause are the the two main sources of temperature difference with the ocean surface, for proposed carnot cycles that generate electricity in the tropical oceans.  These cycles necessarily create large fluid flows near the ocean surface which pass next to the site where electricity is being generated.

Utilizing that electricity to remove CO2 from those fluid flows makes virtue of necessity.

I understand there are quite a number of techniques proposed for such oceanic carnot-cycles, but the aforementioned "virtue of necessity" applies to all of them. Therefore, I would suggest that these ocean thermal electrical generation proposals are inherently suited to carbon dioxide removal.

*I was instrumental in helping Michaud get his grant from Thiel, and remain unconvinced by Bonnelle's critique regarding Rayleigh Instability -- so I do have a dog but I won't unleash him in this particular fight.  Let's not quibble when we can agree on more fundamentally important issues.  (And by the way, I brought up "tropopause" rather than "upper trophosphere" precisely because I am aware of the danger of overshoot delivering water vapor to the stratosphere.  So don't jump all over that either.)

[Michael Hayes]

James, et al.,

Overshooting moist hot air into the stratosphere will likely transfer much of the heat out into space, and the moisture will crystalize out at submicron size.

The last large volcanic eruption demonstrated the physics, the southern hemisphere did temporarily cool due to the added cloud ice.

Mimicking the natural oceanic H2O cycle, via hot moist air injected into the tropopause, can likely be supported by TGE operations. The Thermal Geoengineering technology should be able to power a high air injection operation, the moisture does not go much higher as liquid water or ice, most of the heat ends up in the much hotter thermosphere.

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[James Bowery]

If there is an ocean thermal electric system that can beat 7cents/kWh it may be feasible to leverage the "virtue of necessity" I describe in fluid flow -- specifically ocean water flow.  The recent purported breakthrough in direct ocean carbon dioxide removal described in "Asymmetric chloride-mediated electrochemical process for CO2 removal from oceanwater" is a candidate for leveraging this "virtue of necessity". Assuming $60/tonne CO2 carbon credit and the 122 kJ/mol reported in that paper:


122kJ/(mol CO2);44g/mol;60usd/(tonne CO2)?usd/kWh
> ((122 kilo~joule / (mole CO2)) / (44 gramm / mole))^-1 * (60 usd / (tonnem CO2)) ? usd / (kilo~watthour)
> ((122 kilo~joule / (mole CO2)) / (44 gramf / mole))^-1 * (60 usd / (tonnef CO2)) ? usd / (kilo~watthour)
> (122 kilo~joule / (mole CO2))^-1 * (44 gramm / mole) * (60 usd / (tonnem CO2)) ? usd / (kilo~watthour)
> (122 kilo~joule / (mole CO2))^-1 * (44 gramf / mole) * (60 usd / (tonnef CO2)) ? usd / (kilo~watthour)
= 0.0779016 usd/kWh

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