Power-To-Gas for Energy Storage, Rob Harvey, Hydrogenics
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Power-to-Gas for Energy Storage Rob Harvey Director, Energy Storage DOE Electrolytic Hydrogen Production Workshop National Renewable Energy Laboratory, Golden, CO – Feb 28, 2014 1 Power-to-Gas converts clean generation when it is not needed into renewable fuel, power or heat where and when it is needed Power-to-Gas Solution Integrate Renewables Renewable Gas Options H2 Clean Fuel Wind Power Dispatchable Power H2 Surplus Power H2/NG Blend Electrolyzer Natural Gas Grid H2 Low Carbon Heating Solar Power Industrial H2 2 The value proposition is compelling Power-to-Gas Applications Direct H2 Fueling Industrial Biogas Captive Value Proposition Injection Station H2 Feed Methanation RE Ancillary Services Store Energy Seasonal Storage Tx Grid Capital Deferral Renewable H2 Only hydrogen can provide seasonal storage capacity by charging consecutive days or even weeks without needing to discharge Hydrogen storage far exceeds the capacity of competing storage technology Source: KBB underground 8000 This much could be fed into an underground hydrogen reservoir 6000 (2 M m3salt cavern): (MW) 600,000 MWh 4000 2000 Pumped Hydro Storage Potential 0 Oct 1CAES PotentialOct 3 for Oct 5 Oct 7 Oct 9 Oct 11 Oct 13 2 Mm3 Salt Cavern Source: GM presentation, Freese, May 13, ‘094 4 An alternative operating model for a Power-to-Gas plant is to capture low-cost power and provide ancillary services $/MWh Capital amortized over too few hours a year Higher average electricity cost Optimal LCOE Note: Illustrative example based on SBC Energy Institute simulation based on DOE H2A Model. © 2013 SBC Energy Institute. Source: Excerpt from presentation by Benoit Decourt entitled Hydrogen-Based Energy Storage Solutions at the IEA Hydrogen Roadmap Workshop, Paris – July 10, 2013. 5 For example, an electrolyzer operating 12-15 hours a day could accommodate a wide range of fueling demand and provide a useful regulation band for the ISO Illustrative Lowest Demand Hours Price Per kWh Hydrogenics’ PEMWE Operation System 125 Power Balancing Service (% Nominal) 100 +/- 250kW 75 50 25 0 110 120 130 140 150 160 170 180 190 200 Hydrogen Fueling Demand (kg/day) 6 A number of challenges remain… Remove Barriers to Energy Storage . Power-to-Gas proponents need to join energy storage associations to support efforts to smooth adoption of energy storage technologies . Includes wholesale power input prices, provision of ancillary services, ITCs, procurement targets Testing MW Stacks . Facilities/resources for product development testing of full size electrolyzer stacks in MW and Multi-MW configurations Launch MW-Scale Power-to-Gas Pilot Projects . Need field deployments for different P2G applications . Demonstration of technology and provision of ancillary services . Real operating data will lay foundation for contracting commercial projects 7 Power-to-Gas pilot plants today will drive commercial scale deployments tomorrow To Date… Needs… Future… Demonstration projects Pilot projects using large Commercial scale plants using proven technology scale electrolysis platforms 2 MW Alkaline 1 MW PEM 40 MW Plant 8 .