15670Re: [gaiapc] MIT Scientists Created a New Method of Turning CO2 into Fuel
- 30 Nov, 2017I cannot remember the specific references, but from a number of them. Greeks and others before them, ref Salon via Plato.... polished man sized copper mirrors and shields to focus sunlight onto an enemy force or ship, to stun burn, start fires...rOn 2017-11-29, at 7:27 PM, Jada Thacker jadathacker@... [gaiapc] wrote:"Apparently the ancients did this too and then weaponized it."Can you elaborate on this?I agree that the solar-salt heat arrays are impressive, though I don't know what the EROEI may be. As usual, scalability is always a problem, not to mention that only limited geographical regions have cloudless, high-intensity solar radiation year round -- which introduces transmission-loss problems. So there are a lot of issues.JadaOn Wednesday, November 29, 2017 1:56 PM, "Richard Balfour balfourarch@... [gaiapc]" <gaiapc@...> wrote:See the French and Spanish fields of arrays that focus the sun on a tower collector, the temperatures can be staggering, creating instant steam, and if scaled up with enough heat that nothing can withstand it. Apparently the ancients did this too and then weaponized it.On 2017-11-28, at 4:56 PM, Steve Kurtz kurtzs@... [gaiapc] wrote:EROEI? Done using solar or waste heat according to this, but extremely high temperatures are required.Steve—————————————Doubt is not a pleasant condition, but certainty is absurd.
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