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Joined 1 year ago
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Cake day: June 21st, 2023

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  • well no storage can be 100% efficient but you are correct that thermal storage is very efficient if you want a thermal gradient to leverage for heating (cooling as well)

    I am assuming you mean Pumped-storage hydroelectricity when you say PHES and no it also falls under F=ma, but when using the terrain is able to increase the amount of mass to a more industrial useful scale. The larger the scale the smaller the losses. Hence most economical when one has mountains for the storage of the water. (metal/plastic tanks on elevated platforms tend to be much less efficient and more expensive).

    I guess it depends on what you mean by rare long duration events but yes one can imagine a situation where the burning of hydrogen is justified on an energy needs basis.