Economically Viable Intermediate to Long Duration Hydrogen Energy Storage Solutions for Fossil Fueled Assets

The goal of this research is to explore and advance an innovative hydrogen (H2) energy storage system – the Synergistically Integrated Hydrogen Energy Storage System (SIHES) – with existing or new coal- and gas-fueled electricity generating units (EGUs) that are best suited for the intermediate- to long-duration energy storage needs (i.e., from 12 hours to weeks). Such a storage system enables the EGUs to operate at optimal baseload operation conditions. The added round-trip electricity (E)-H2-E cost is $5-10/MWh, or less than 10% of the levelized cost of energy (LCOE) of today's fossil plant for 30 years operation.