WASHINGTON, Sept. 28 -- The U.S. Department of Energy announced that it expects to award up to 15 cooperative agreements for renewable energy research and development. The agency description of the cooperative agreement states: "Specifically, this FOA will implement two approaches to energy storage in concentrated solar-thermal (CST) systems: thermochemical storage via solar fuel production and local thermal energy storage (TES) for dispatchable energy. The two technologies will support the gov more ST