Thermal energy storage tank using modular heat batteries

摘要

A thermal energy storage apparatus comprising a thermally insulated tank having a bottom, side wall and roof; a plurality of spaced apart modular heat batteries inside the tank supported on load bearing thermal insulation on the tank bottom; each heat battery constituting an enclosed metal shell containing a bed of solid objects and around which objects a liquid can flow; a conduit to feed a hot or cold liquid from outside of the tank to the top of each bed in each battery; and a conduit to withdraw a hot or cold liquid from the bottom of each bed in each battery and deliver it to a destination outside of the tank.