edf and sco2 · 2 turbomachinery design wp2 designing a boiler meeting sco2 operation conditions...
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WHY AND HOW
SCO2 IS NOW A
RESEARCH TOPIC
FOR EDF
2nd European sCO2 Conference
August 30th, 2018
This project has received funding from the European Union’s Horizon
2020 research and innovation programme under grant agreement No
764690
Before…
2nd European sCO2 Conference
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OUR AIMBe the leading electricity company and global leader for low-carbon energy production
WORLD’S No. 1
ELECTRICITY
COMPANYThe Group is particularly well established in Europe, especially France, the United Kingdom, Italy and Belgium. A marked increase in the use of renewables is bringing change to its energy production operations, which are underpinned by a diversified low-carbon energy mix founded on nuclear power capacity.
LEADER IN LOW-
CARBON
PRODUCTIONNo. 1 producer of nuclear electricityin the world.No. 1 producer of renewables in Europe.No. 3 European operator of energy services.
EDF COVERS
ALL
ELECTRICITY
ACTIVITIESGeneration.Transmission and distribution.Supply.Energy services.
2nd European sCO2 Conference
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AN R&D DIVISION SERVING THE COMPANY'S
OBJECTIVES
2nd European sCO2 Conference
R&D IN FIGURES
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STRATEGICPRIORITIES4in line with the EDF Group CAP 2030 strategic project
CONSOLIDATE AND DEVELOP COMPETITIVE AND ZERO-CARBON PRODUCTION MIXES
Help successfully deliver renewable
energy projects and prepare for
tomorrow’s technologies
Consolidate the Group's nuclear
power assets and build its future,
Ensure flexibility in the nuclear and
renewable mix,
Manage and anticipate environmental
impacts
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CONTEXT BEFORE SCO2 ACTIVITIES
2nd European sCO2 Conference
OUR TEAM IN EDF R&D :• MANAGEMENT OF SEVERAL PROJECTS FOR EMISSIONS REDUCTION OF FOSSIL PLANTS
• PARTICIPATION TO THE NUMEROUS PROJECTS ON RENEWABLES DEVELOPMENT IN EDF
TO DECARBONIZE ELECTRICITY PRODUCTION WE MUST CONSIDER :• CARBON CAPTURE ON FOSSIL POWER PLANTS
• RENEWABLE ENERGIES DEVELOPMENT
FOR EXISTING PLANTS :
POST
COMBUSTION
PROCESS
EFFICIENCY
PENALTY
LOWER
FINANCIAL
GAINS
DEVELOPMENT
HANDICAP
2 SOLUTIONS :
IMPROVE POST-COMBUSTION PROCESS
INCREASE POWER PLANT EFFICENCY
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IMPROVE, BUT HOW ?
2nd European sCO2 Conference
DIFFERENT WAYS ARE POSSIBLE:
• Research on A-USC coal plant
• Expensive costs still a barrier
Improve the known existing system
• Research on precombustion carbon capture
• Change cycle to adapt high TRL post-combustion capture processes
Change of point of view, so change of cycle type
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2012, BEGINNING OF OUR REFLECTION ON THE
USE OF AN SCO2 CYCLE
EDF Scientific paper by Yann Le Moullec :
SCO2 Brayton cycle combined with Carbon Capture and Storage (CSS) in coal power
plant
Adaptation of cycle initially planned for
nuclear power to a coal cycle
Significant gain in the plant's efficiency, to
absorb the penalty of the post-combustion
capture system
2nd European sCO2 Conference
| 92nd European sCO2 Conference
Politic ambition to reduce greenhouse gasemissions
Increase of renewablesdevelopment
Need for flexibility
Decrease of interest in fossil plants
Reduced coal plant investments
SCO2 CYCLE FOR COAL POTENTIAL COSTS-
KILLER AND FLEXIBLE
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2014 TO 2017 : DEVELOPMENT OF SCO2
ACTIVITIES IN EDF
2nd European sCO2 Conference
2014
2015
2017
2016
Internal expertise: analysis of technological barriers First performance estimates (process simulation)
Roadmap for the technological development of the SCO2 cycle
Start of the PhD thesis on SCO2 cycle optimization[Qiao ZHAO]
Scientific Congress: Clean Coal Technologies 2015
x4
Pre-sizing toolbox for the main components[EDF China] Scientific publication: SCO2 Brayton cycle for coal power plant
Preliminary studies on the flexibility of the SCO2 cycle
Scientific congresses: SCO2 symposium USA + Europe + congress in China
European project accepted: SCO2-FLEX. EDF iscoordinator
Opportunity for retrofitting, boiler pre-sizing[EDF China]
Development of a complete dynamic physical model on Dymola[EDF China]
Scientific publications: in "Science" and otherscientific journals
Scientific congresses: SFGP Nancy 2017, WCCE Barcelona 2017
x2
x2
Now…
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STRATEGIC OBJECTIVES FOR THE
COLLABORATIVE PROJECT SCO2-FLEX
Objective 1:
Upgrade of skills on this new cycle for our teams
Objective 2:
Define a real roadmap for the technology
development with an operator's point of view
Objective 3:
Develop at European level a real network of expertise on this cycle, in order to discuss on an equal level
with USA and Asia
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SCO2-FLEX OBJECTIVES
To design a supercritical CO2 (sCO2) Brayton cycle able to increase the
flexibility and efficiency of existing and future coal and lignite power plants
To run at the lowest
possible part load and at the highest
possible efficiency.
Operational flexibility is a
significant challenge for
fossil fuel power
High potential for
integration of both existing
and new thermal
power plants.
Low greenhouse
gas emissions,
residue disposal and water need
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SCO2-FLEX ORGANISATION
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MAIN CHALLENGES
High rotation
speeds
Heat sink
management
Bearings and sealings
leak-tightness
(high p and T)
Materials (high p
and T): corrosion,
metal dusting,
oxidation
Materials (creeping)/sealings
stability
High differential pressure
Pressure drops
Pressure losses inside
the boiler
High flow rates
management, purity
and storage, CO2leakage related risks
Total pressure drops
Cycle optimization
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SCO2-FLEX OVERALL CONCEPT
Phase 1 : Flexible Framework basis
make a preliminary selection of the most
promising architectures of the cycle for
managing load fluctuations and their
operating specifications
Phase 2 : Critical components
development
validate equipments and carry out detailed
cost estimation
Phase 3 : Cycle Integration and flexibility
assessment
finalize the design of a 25MWe cycle,
building on the previously generated data
exploitation and dissemination
2nd European sCO2 Conference
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WP1Defining cycle architecture and specifications would allow to meet future flexibility needs, while increasing efficiency, reducing its environmental impacts and being cost-effective and competitive
WP3Designing turbomachinery and its optimal configuration
Shaft line configuration
Compressor design
Turbine study
Dynamic simulations
sCO2 Turbomachinery design
WP2Designing a boiler meeting sCO2 operation conditions
Boiler thermodynamic modelling
Corrosion analysis
Optimal materials selection
Pre-heating solution design
sCO2 Boiler design
WP6 25 MWe sCO2 cycle final design with a focus on flexibility and reliability conditions Complementarity with CCS solutions and applications
WP7Economic Impacts & Environmental Impacts & Social Impacts
Economic
WP8Exploitation & Dissemination & Communication
How to make coal and lignite power plants more flexible?THEORETICALLY, through a Supercritical CO2 Brayton cycle, BUT IN PRACTICE nobody has developed…. So…
WP4Designing and testing innovative compact HX
HX configuration & materials selection
HX design study
HX prototype design
HX prototype manufacturing
HX prototype testing
WP5Defining the optimal sCO2 plant configuration to guarantee both outstanding flexibility and high performance Instrumentation and
control strategiesStatic simulations at system level
Dynamic simulations at system level
Benchmark simulations on experimental data
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SCO2-FLEX : OVERALL STRUCTURE
2nd European sCO2 Conference
And then…
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SCO2 CYCLES DEVELOPMENT NEEDS
Develop the cycle for other production plants, in particular renewable and nuclear power
Acquire real experience in piloting this cycle for operators
Control and reduce investment and operating costs of sCO2 cycle in order to create and sustain the market
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TO CONCLUDE
Continue discussions between researchers, industry and operators
Develop collaborative projects again and again to control research costs and best meet the needs of end users
Identify and continue our efforts on the steps needed to develop sCO2 cycles
2nd European sCO2 Conference
Thank You
This project has received funding from the European Union’s Horizon 2020 research and
innovation programme under grant agreement No 764690
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