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Existing low-cost, reliable heaters only go to about 850 C.
Ultimately, Forsberg suggests, the bricks themselves could be made electrically conductive, so that they could act as low-cost resistance heaters on their own, both producing and storing the heat.
Distributors determine how much power they expect to need during each hour, and suppliers bid based on their expected costs for producing that power.
Depending on the needs at a given time, these prices can be low, if only baseload natural gas plants are needed, for example, or they can be much higher if the demand requires use of much more expensive “peaking” power plants.
For example, bricks to be placed in the center of the assemblage could have high thermal conductivity, so that they can easily take in heat from the resistance heaters.