Abstract
Impact of battery and hydrogen co-firing technology under high penetration of renewable energy is discussed in this paper. Today, management of surplus electricity from renewable energy is becoming an important issue for establishing a low carbon society. For managing surplus electricity from domestic renewable energy, we evaluate the co-firing technology which is premised on utilizing imported hydrogen. The optimization of energy model incorporating battery and hydrogen co-firing is used for economic impact evaluation. Optimized results suggest that utilization of both technologies reduces the total cost of electricity and further lower the limit of CO2 emissions. From the sensitivity analysis under 100gCO2/kWh as emission factor constraint, the efficiency of gas fired power plant shows relatively high sensitivity by increasing the overall efficiency of co- firing. It is also suggested that levelized cost of electricity (LCOE) is insufficient and overall system evaluation is essential for impact evaluations of energy storage technologies.
