WORKSHOP ON TECHNOLOGY PATHWAYS FORWARD FOR CARBON CAPTURE & STORAGE ON NATURAL GAS POWER SYSTEMS April 22, 2014 Revis W. James Director, Generation R&D.

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Presentation transcript:

WORKSHOP ON TECHNOLOGY PATHWAYS FORWARD FOR CARBON CAPTURE & STORAGE ON NATURAL GAS POWER SYSTEMS April 22, 2014 Revis W. James Director, Generation R&D Overview of Natural Gas Power Generation Future Scenarios

2 © 2014 Electric Power Research Institute, Inc. All rights reserved. EPRI Overview Mission Assure long-term availability of affordable, reliable, and environmentally responsible electricity through research, development and demonstration. Key Facts 450+ participants in more than 30 countries EPRI members generate approximately 90% of the electricity in the United States International funding of nearly 25% of EPRI’s research, development and demonstrations Non-profit, independent, collaborative R&D institution

3 © 2014 Electric Power Research Institute, Inc. All rights reserved. Generation Technology Options Policy Constraints CO 2 emissions reduction Existing limits(e.g. SO x, NO x, Hg, thermal pollution) Water availability Environmental impact of renewables (e.g. avian, bats) Policy-driven technology choices (e.g. renewables)

4 © 2014 Electric Power Research Institute, Inc. All rights reserved. Meet demand Maintain reliability Minimize cost Recognize long lead times for technology deployment. Hedge technology risks Generation Technology Options Technical Requirements

5 © 2014 Electric Power Research Institute, Inc. All rights reserved. Natural Gas - Strengths Low NG prices make CTCCs attractive –breakpoint with coal regionally dependent, but generally in $4-$6/mmBtu range Reduced fossil plant emissions, including CO 2 More operational flexibility compared to coal units. Smaller capital outlay for new capacity, can be constructed more quickly, lower water requirements compared to coal/nuclear Delays need to invest in more expensive options (e.g. coal, nuclear) –Gives lead time to develop more advanced technologies in for other generation technologies.

6 © 2014 Electric Power Research Institute, Inc. All rights reserved. Natural Gas – Challenges Dynamic combustion control –Balancing efficient operations w/emissions control CTCC cycling/HRSG reliability –Renewable portfolio standards + increasing role of demand response, end-use efficiency => increased cycling of CTCCs => performance, reliability issues –Heat Recovery Steam Generators (HRSGs) particularly important, problematic Assurance of supply –Concerns regarding increasing opposition to fracking. Hedging against future high NG prices, price volatility –Substantially increased demand for natural gas from the power sector could significantly drive prices up. –~55% of electricity production costs for CTCCs = fuel cost.

7 © 2014 Electric Power Research Institute, Inc. All rights reserved. Trending Toward Higher Efficiency Improved Metallurgy, Coatings, Cooling, Aerodynamics, Size Majority of existing units

8 © 2014 Electric Power Research Institute, Inc. All rights reserved. R&D Focus Areas Improved Efficiency, Flexibility, and Durability Fuel Flexibility –LNG and Natural Gas Variability –Lower NO x and CO Emissions/Combustion Dynamics Operational Flexibility –Fast Startup and Shutdown –Frequent Cycling (Many Starts Per Year) –Part Load Efficiency and Low Load Emissions –Load Following and Frequency Control System/Component Durability –Preventive Maintenance –Repair and Replacement Costs –Forced/Unscheduled Maintenance, Catastrophic Failures

9 © 2014 Electric Power Research Institute, Inc. All rights reserved. R&D Focus – CTCC + CCS Evaluate the performance and cost impact of applying post-combustion capture (PCC) to today’s NGCC Cases considered: –Reference 556-MWe (Net) base NGCC plant –Retrofit post combustion plant to base plant –New build NGCC plant designed with capture –New build NGCC plant designed with capture + exhaust gas recycle (EGR). PCC technology = advanced amine solvent (Aker Clean Carbon) Conclusions –Retrofitting is more expensive than integrated design. –Key sensitivities Engineering, procurement & construction (EPC) contingency Unit capacity factor Overall levelized cost of electricity more sensitive to fuel cost than to avoided CO 2 cost

10 © 2014 Electric Power Research Institute, Inc. All rights reserved. Overview from Electricity Sector Perspective

Together…Shaping the Future of Electricity