Research Centre Rez

sCO2 experimental loop and

CVR R&D activities

Aleš Vojáček

01.09.2017

Providing a facility to study key aspects of the

Brayton cycle (heat transfer, performance of

compressor and turbine, erosion, corrosion etc.)

with wide range of parameters: temperature up to

550°C, pressure up to 30 MPa

The sCO2 loop is flexible, easy to modify and

suitable for testing key components of the Brayton

cycle:

compressor and turbine

heat exchangers

heaters

valves

Goals SUSEN sCO2 loop

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SUSEN sCO2 loop

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- High pressure section

- Low pressure section

Circulation pump

Pressure pulse dumper

Electrical pre-heater

Low temperature HX

High temperature HX

Test-section with

the main heater

Oil cooler Reduction valveMain water cooler

CVR S-CO2 loop (SUSSEN)Max. operating temperature: 550˚C

Max. pressure at high pressure site: (25) 30 MPa

Max. pressure at low pressure site: (12,5) 15MPa

Max. flow rate: 0,4 kg/s

Total heating power: 110 kW

Power of the pre–heater : 20 kW

Power of the main heater : 90 kW

SUSEN sCO2 loop

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SUSEN sCO2 loop

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SUSEN sCO2 loop

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Manufacturing process

Pressure vessels

Heat exchangers, heaters, coolers, pipeline system….

Other parts are purchased and assembled in CVR

All pumps (CO2 , oil, H2O,), oil cooler, oil HX, valves, vacuum

pump, heatings rods, isolation… etc.

GoFastR / FP7 / 2010-2013 / finished

Optimisation of CO2 cycle for GFR reactor

SUSEN – sCO2 loop / finishing

Design, construction, calculations, fabrication,

commissioning

COPRO / TAČR / 2014 - disapproved

Partners – CVR, UJV, UJV – EGP, DOOSAN

Goals – cycle optimization, basic design of the turbine,

material selection, material testing, ...

CVR projects

6

sCO2-HeRo / H2020 / 2015 – 2018 / ongoing

The sCO2 loop was used for testing heat transfer

components, particularly air heat sink. Further, the turbo

machine (compressor, turbine) is tested to verify the

numerical results of the performance map.

CVR projects

7

http://www.sco2-hero.eu/

sCO2-HeRo / H2020 / 2015 – 2018 / ongoing

Experimental data – air heat sink

CVR projects

8

T_CO2_in=166°C

V_air=12 000 m3/h

9 000 m3/h

6 000 m3/h

12 000 m3/h

p_CO2_in=7.8 MPa

T_CO2_out=34.5°C 34.9°C 35.8°C

T_air_out=50°C55°C

65°C

T_air_in=23.5°C

3 min.

6.4 MPa

7.8 MPa 7.8 MPa

CVR projects

9

Modeling and simulation play a key role in the design

phase and performance optimization of the sCO2 loop

Modeling TH tools for sCO2 loop

Modelica simulation language (object-oriented,

equation based) in Dymola environment

complex systems, e.g., systems containing

mechanical, electrical, electronic, hydraulic, thermal,

control, electric power or process-oriented

subcomponents

Open source - Modelica library – ClaRa (Clasius-

Rankine cycles)

Dynamic investigation of power processes

sCO2-HeRo / H2020 / 2015 – 2018 / ongoing

Dynamic model of air heat sink

CVR projects

10

sCO2-HeRo / H2020 / 2015 – 2018 / ongoing

Air heat sink experimental data vs Dynamic model

CVR projects

11

sCO2-HeRo / H2020 / 2015 – 2018 / ongoing

Air heat sink experimental data vs Dynamic model

CVR projects

12

sCO2-HeRo / H2020 / 2015 – 2018 / ongoing

Air heat sink experimental data vs Dynamic model

CVR projects

13

sCO2-HeRo / H2020 / 2015 – 2018 / ongoing

Air heat sink experimental data vs Dynamic model

CVR projects

14

sCO2-HeRo / H2020 / 2015 – 2018 / ongoing

Air heat sink experimental data vs Dynamic model

CVR projects

15

sCO2-HeRo / H2020 / 2015 – 2018 / ongoing

Air heat sink experimental data vs Dynamic model

CVR projects

16

sCO2-HeRo / H2020 / 2015 – 2018 / ongoing

Operating scheme for TG testing

CVR projects

17

POSITIF / TAČR / 2017 – Czech – China

colaboration/ disapproved

Physical properties, heat transfer, critical flow and dynamic

oscilation in super-critical media

Partners – CVR, SJTU, (CVUT)

sCO2-Flex - project for demonstration unite /

H2020 – start in 2018

develop and optimize the design of a 25 MWe sCO2 Brayton

cycle and its main components (boiler, HX, turbomachinery,

instrumentation and control strategies).

Partners: EDF (coordinator), GE, Fives Cryo, Politecnico di

Milano, Centro Sviluppo Materiali S.p.A. , University of

Duisburg-Essen, CVR, University of Stuttgart, ZABALA

Innovation Consulting

CVR activity proposal – sustainability of sCO2 SUSEN loop

Cycle calculations, TH code validation and/or benchmarking, HX

testing, corrosion tests

CVR projects

18

Fluoride salt cooled High temperature Reactor /

Molten Salt Reactor - potential applications for

small modular reactors

FHR/MSR - potential applications –

ongoing

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