Economic Long-Duration Electricity Storage by Using Low-Cost Thermal Energy Storage and High-Efficiency Power Cycle
Project Innovation + Advantages:
The National Renewable Energy Laboratory team will develop a high-temperature, low-cost thermal energy storage system using a high-performance heat exchanger and Brayton combined-cycle turbine to generate power. Electric heaters will heat stable, inexpensive solid particles to temperatures greater than 1100°C (2012°F) during charging, which can be stored in insulated silos for several days. To discharge the system, the hot particles will be fed through the fluidized bed heat exchanger, heating a working fluid to drive the gas turbine attached to a generator. The electricity storage system is designed to be deployed economically anywhere in the United States.
Energy storage technologies could help improve grid efficiency and promote the growth of domestic renewable energy sources.