[jerven]

Yes, in theory, but your process control would be terrible, thus your product would also be terrible. Unless you invent something very clever.

[BiteCode_dev]

But that makes them superb heat battery, which is under used at the moment to store energy.

[pas]

because of the Carnot cycle, no? it just doesn't make much sense to store energy as heat

[BiteCode_dev]

A lot of energy is spent to heat things anyway.