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Solo

Storage of excess power by freezing air

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1 minute ago, Solo said:

https://www.scientificamerican.com/article/to-store-renewable-energy-try-freezing-air/

This sounds like something Eskom could use instead of pumped water storage and diesel 

Look compressed air storage is useful, and definitely another tool in the toolbox.

But its has a high energy losses, its only has around 40-50% round trip efficiency, where pumped hydro storage can have around 75% round trip efficiency.

So in places where you have excess power more often than not CAES makes a lot of sense, but in SA where we barely have enough generation to begin with I don't see it taking off anytime soon, unless of course PV does truly explode onto the scene in SA, and we start measuring installed capacity in multiple GW's  then bring it on.

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