2 MEGAWATT HOUR ENERGY STORAGE-BOILER TANK.

Massive energy storage involves utilization of major tonnages of storage material. An energy-storage boiler tank is described in which heat is effectively transferred to and from large quantities of fusible salt by condensation and evaporation of heat transfer fluid. Temperature drops within the salt are minimized by making available large areas for heat conduction by encapsulating the salt in containers with a large aggregate surface area. It describes the coupling of the energy storage medium to a steam generator which functions as a condensation boiler. In this paper we describe laboratory studies carried out in support of plans to construct a 7. 2 GJ (2 MWh) storage tank using these principles, and the design status of the 2 MWh tank.