9-O-3A-4 Cryogenic system for the 43 T Hybrid Magnet at LNCMI Grenoble From the needs to the commissioning

Transcription

1 9-O-3A-4 Cryogenic system for the 43 T Hybrid Magnet at LNCMI Grenoble From the needs to the commissioning L. Ronayette, G. Caplanne, P. Hanoux, R. Pfister, M. Pissard, P. Pugnat CNRS-LNCMI, Grenoble, France C. Berriaud, R. Berthier, P. Graffin, B. Hervieu, FP. Juster CEA-IRFU, Saclay, France S. Crispel, M. Gorski, T. Hergat, B. Vincent Air Liquide Advanced Technologies, Sassenage, France

2 Outline European Magnetic Field Laboratory LNCMI-G Hybrid Magnet Superconducting coil Cryogenic system Helium liquefier (S. Crispel) Conclusion

3 High Magnetic Field Laboratories in Europe Continuous Pulsed 1 st January 2009: Merger of Grenoble and Toulouse to create LNCMI Nijmegen (2003) Dresden (2006) Grenoble (1992) Toulouse (1990) 27 th January 2015: foundation

4 The LNCMI-G Hybrid Magnet Modular Platform for the production of High Magnetic Field Equipex 43 T / 34 mm hybrid magnet 24 MW T / Supra + Bitter + Poly-helix 34 T / 34 mm hybrid magnet 12 MW 27 T / 170 mm hybrid magnet 18 MW 17.5 T / 376 mm hybrid magnet 12 MW 8.5 T / 800 mm superconducting magnet alone = 43 T Under Study Upgrade phase of resistive magnets + 9 T produced by the superconducting coil 43 T / 34 mm 45 T / 34 mm? Hydraulics : Total stored Energy : 300 l/s 108 MJ 23 kg TNT More details on resistive magnets : F. Debray et al IEEE Trans. Appl. Supercond. vol. 22, Last status report on the Hybrid project : P. Pugnat et al IEEE Trans. Appl. Supercond. vol. 26,

5 The superconducting Nb-Ti coil: 8.5 T / 1.8 K CEA - CNRS Collaboration RCOCC : "Rutherford Cable On Conduit Conductor" - Study and production of 44 lengths of 280 m: (production line under commissioning) - Realization production line: Soft alloy tape Flat Rutherford cable 19 strands dia. = 1.62 mm 6264 filaments/strand, dia. = 14 µm More details on the RCOCC conductor : P. Pugnat, et al IEEE Trans. on Appl. Supercond. 22, Coil : - 37 x 245 m long double pancake of 2 x 26 turns - Electrical connection of double-pancake in series - Vacuum impregnation of each double-pancake separately - Mass = 16.2 tons - Operating temperature = 1.8 K - Inner / outer dia. = 1150 / 1868 mm - Height = 1400 mm - Nominal / ultimate current = 7100 / 7500 A - 38 junctions R < 1 nω / junction Study : Realization : (contract signed January 2016) Flux Cu-Ag 0.05% (RRR 60) extruded stabiliser

6 The cryostat 5 levels of temperature and an innovative patented insulating support ferrule More details on both mechanical and cryogenic designs : B.Hervieu et al Physics Procedia

7 The cryogenic system principle: Superfluid pressurized LHe bath at 1.8 K, 1200 hpa Inventor of this principle : G. Claudet ICEC Mendelssohn Award 2002 More details on the cryogenic system : L. Ronayette et al Proc. of the 12 th International Institute of Refrigeration Conference - Cryogenics 65-72

8 The cryoplant Pumping system Commissioned and tested in June g/s 20 C 10 hpa (+ 60 % / estimated needs in 2013) Recovery compressor 120 m 3 /h NTP (i.e. 5.5 g/s) up to 400 bara Recommissioned and retested in September 2014 Recommissioned and retested in October 2014 And an Helial ML helium liquefier...

9 Main features of the specification Air Liquide proposal Magnet operation mode LHe at 4.5 K 1.3 bara requirements (l/h) 4.5 K non energ. 0 T K non energ. 0 T K energ. 8.5 T K energ. 9 T 115 Magnetic environment (coldbox in mt straight field) Existing 4500 L Dewar with dedicated flange Additional port on liquefier to supply 20K to cryostat Full turnkey system through existing building (high voltage area) with anticipated piping work at beg. of project => System capacity requirement > 130 L/h 62 meters Global solution => 135 L/h with LN 2 precooling, purifier in normal operation (pumped helium through recovery circuit) with He 99.9% and exceptional with H Cold box automatic and adaptative mode when magnet in stand-by or reduced operation Liquefaction production without LN 2 : 40 L/h 9 08/03/2016 Air Liquide, leader mondial des gaz, technologies et services pour l industrie et la santé

10 Installation Continuous operation dryer 190 kw 54 bara oil screw compressor with VFD HELIAL ML & 4500 L Dewar Oil removal system C3 3D and 2D turbines 10 08/03/2016 Air Liquide, leader mondial des gaz, technologies et services pour l industrie et la santé

11 Successful integration & commissioning Schedule Project awarded : 7/08/ st phase mechanical integration during lab shut-down : December 2013 to February 2014 Final mechanical completion : Nov (with module delivery) Final acceptance (24h at nominal cond. : 19/02/2015 Performance : + 11% thanks: Overcapacity on compressor flowrate : +5.8% Better turbine efficiencies (1st double 3D turbines on C3 range turbine ) : > 80 % Final performances Complete cool-down = 5.5 h Liquefaction rate = L/h with LN2 preccoling, Purifier ON (99.9%) Stable operation with transfer simulation (200 L/h) Maximum Liquefaction rate = L/h with LN 2 preccoling, Purifier ON (99.9%) 11 08/03/2016 Air Liquide, leader mondial des gaz, technologies et services pour l industrie et la santé

12 Conclusion CNRS-LNCMI in close collaboration with CEA-IRFU is in the last phase of the development of the French 43 T Hybrid Magnet For this project, Air Liquide has developed and installed a global solution based on the most powerful Helial ML liquefying system ever made The cryoplant has been successfully commissioned and is now ready to be connected to supply the cryogenic system (planned for 2018) The cryoplant is regularly operated and functionally controlled (every week for the recovery system, twice per month for the cycle compressor, every two months for the pumping station and twice per year for the liquefier and the LHe Dewar) /03/2016 Air Liquide, leader mondial des gaz, technologies et services pour l industrie et la santé

13 This project is supported and funded by