Solar Thermochemical Pilot Plant Operation at PROMES-CNRS MegaWatt Solar Furnace

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1 Solar Thermochemical Pilot Plant Operation at PROMES-CNRS MegaWatt Solar Furnace Anton Meier Solar Technology Laboratory, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland

2 Outline 100 kw Pilot Plant at MWSF Installation Commissioning Scientific Background Solar ZnO dissociation at 2000 K Solar reactor technology CNRS 1 MW Solar Furnace Odeillo, France Experimental Results Solar reactor experiments Flux measurements Outlook / Acknowledgements 2

3 PROMES-CNRS Odeillo: 1 MW Solar Furnace (MWSF) 3

4 100 kw Solar Pilot Plant for Thermal Dissociation of Zinc Oxide Installation (2) Moved to solar tower of MWSF (1) Mounted on mobile carriage (2) Installed in focus of the MWSF (3) (1) (3) 4

5 100 kw Solar Pilot Plant for Thermal Dissociation of Zinc Oxide Commissioning (4) Gas supply and off-gas system (1) Cooling water supply (2) Electrical and electronic connections (3) Process control and DAQ systems (4) (1) (2) (3) 5

6 Solar Thermochemical Splitting of H 2 O and CO 2 Concentrated Solar Energy ZnO SOLAR REACTOR ½ O 2 ZnO Zn + ½ O 2 H = 557 kj/mol, T H > 2000 K Zn H 2 O + CO 2 REDUCTION REACTOR 2Zn + H 2 O + CO 2 2ZnO + H 2 + CO recycling H = -67 kj/mol, T L = 400 K ZnO ZnO H 2 + CO (Syngas) Liquid fuels Materials 3, , Partners: Funding: PSI & ETH Zurich SFOE, PSI, ETHZ 6

7 Solar Reactor Technology Cavity receiver Rotary joint Front cone Quartz window ZnO Zn + ½ O 2 Concentrated solar radiation Outlet tube Quench unit Insulation Aperture Front shield Partners: Funding: PSI & ETH Zurich SFOE, PSI 7

8 100 kw Solar Pilot Plant Layout Window Support for radiation shield Rotary reactor Screw feeder ZnO container Mixer motor Screw motor Filter Bosch profile Motorized wheels for cavity rotation Mobile carriage Product gas outlet Data acquisition system Partners: Funding: PSI & ETH Zurich SFOE, PSI 8

9 Solar Experimental Campaign 2012 Timetable Installation (1 day) Commissioning (3 days) Solar Experiments (11 days) Maintenance/Analysis (19 days) Flux Measurements (9 days) Decommissioning (2 days) 9

10 Temperature Devolution Typical run (July 12, 2012) 7 B- and 9 K-type thermocouples installed throughout the reactor Preliminary Results Doors closed Doors closed 10

11 Ray Tracing and Transient Heat Transfer Modeling shutter doors solar reactor Circumferentially averaged parabolic dish tower heliostat field Cooper, MSc Thesis, ETH Zurich,

12 Flux Measurement Scheme Array of 5 thermogages (Vatell) arranged on a 600 mm dia. disk (corresponding to window dia.) By rotating the disk in steps of 45 degrees, 33 data points are measured per heliostat Flux Measurement 12

13 Flux Measurement Flux Measurement Device (1) Automatic rotation of disk in steps of 45 degrees DAQ (1) Image of concentrated sunlight from heliostat on rotating disk and radiation shield (2) (2) Image of heliostat on parabolic mirror (3) (3) 13

14 Preliminary Results Flux Measurement (Heliostat Field) Row 8 Row 7 Row 6 Row 5 Row 4 Row 3 Row 2 Row 1 Columns out of 63 heliostats used 14

15 Conclusions and Outlook Experimental Campaigns at MWSF Year SFERA PSI Spare weeks 3 weeks 2 weeks weeks 3 weeks 1 week Valuable operational experience in unique solar facility CNRS 1 MW Solar Furnace Odeillo, France Data evaluation Publication Future Objectives 100 kw reactor optimization Conceptual design for MW plant (Next experimental campaign in 2014?) 15

16 Acknowledgements Financial Support Swiss Federal Office of Energy (SFOE) European Project SFERA, grant No Contributions PSI staff: Yvonne Bäuerle Rahul Bhosale Majk Brkic Alwin Frei Daniel Meyer Peter Schaller Willy Villasmil Daniel Wuillemin PROMES-CNRS staff: Emmanuel Guillot Jean-Louis Sans; Nicolas Boullet Hosting Gilles Flamant, Marie Prouteau PROMES-CNRS 1 MW Solar Furnace Odeillo, France 16

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