edf and sco2 · 2 turbomachinery design wp2 designing a boiler meeting sco2 operation conditions...

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…


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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.


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AN R&D DIVISION SERVING THE COMPANY'S

OBJECTIVES


R&D IN FIGURES

| 52nd European sCO2 Conference

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


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 ?


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



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


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



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


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


Thank You

This project has received funding from the European Union’s Horizon 2020 research and

innovation programme under grant agreement No 764690

edf and sco2 · 2 turbomachinery design wp2 designing a boiler meeting sco2 operation conditions...

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