Goldman Sachs invests $250M in compressed air energy storage
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Goldman Sachs invests $250M in compressed air energy storage
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Re: Goldman Sachs invests $250M in compressed air energy storage
#2I knew Danielle Fong from Lightsail Energy, folded in 2016, and at that time compressed air seemed like a great solution especially for LatAm that needed robust low cost batteries for critical infrastructure (like hospitals) on an unreliable power grid. https://en.wikipedia.org/wiki/Danielle_Fong
Would be great to see this technology reach maturity!
Re: Goldman Sachs invests $250M in compressed air energy storage
#3What is the expected efficiency of this?
Re: Goldman Sachs invests $250M in compressed air energy storage
#4What is the expected efficiency of this?
I too was wondering that as the ideal gas law states that PV = nRT. When you compress a gas it gets hotter, conversely, allowing it to decompress cools it. I assume they store the heat energy...
Re: Goldman Sachs invests $250M in compressed air energy storage
#5This brings to mind the other post about the Amish that's on today's front page. I believe the Amish sometimes use compressed air as an alternative form of power.
Re: Goldman Sachs invests $250M in compressed air energy storage
#6What is the expected efficiency of this?
CAES has lower efficiency, probably closer to 70% and only if you use something to reheat the air. (Compressed air loses temperature and needs an external source of heat to restore it to full volume)
Even if you use natural gas as a reheating element, the compressed air stores a significant amount of energy and is doing the majority of the work.
Re: Goldman Sachs invests $250M in compressed air energy storage
#7Interesting. There's a good video describing the operation here: https://www.youtube.com/watch?v=cOWjwwKSR78
After watching it, I now understand that they aren't flooding the entire borehole, but rather are building a smaller high-pressure chamber at the bottom. The chamber is connected to pipes to a surface reservoir. When air is pumped into the chamber, it displaces water up toward the surface. When generating, the water flows back into the subsurface chambers, forcing out the high pressured air.
Re: Goldman Sachs invests $250M in compressed air energy storage
#8Given it's GS, $250m is peanuts.
Re: Goldman Sachs invests $250M in compressed air energy storage
#9What is the expected efficiency of this?
I too was wondering that as the ideal gas law states that PV = nRT. When you compress a gas it gets hotter, conversely, allowing it to decompress cools it. I assume they store the heat energy... https://en.wikipedia.org/wiki/Compressed-air_energy_storage
Yes, their website says they have a thermal store.
Re: Goldman Sachs invests $250M in compressed air energy storage
#10This brings to mind the other post about the Amish that's on today's front page. I believe the Amish sometimes use compressed air as an alternative form of power.
Also quite popular in mines because it doesn't create sparks.