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IWC-HTS 2017, OR5-4
P.1CEC-ICMC 2013 4EOrB3-02
Development of High-capacity Single-stage GM Cryocoolers at SHI
Mingyao Xu, Qian Bao and Takaaki Morie
September 14, 2017
Technology Research CenterSumitomo Heavy Industries, Ltd.
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IWC-HTS 2017, OR5-4
P.2
• Introduction
• Scotch-yoke-driven Single-displacer GM cryocooler
• Scotch-yoke-driven dual-displacer GM cryocooler
• Pneumatic dual-displacer GM cryocooler
• Conclusions
Contents
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IWC-HTS 2017, OR5-4
P.3
• Introduction
• Scotch-yoke-driven Single-displacer GM cryocooler
• Scotch-yoke-driven dual-displacer GM cryocooler
• Pneumatic dual-displacer GM cryocooler
• Conclusions
Contents
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P.4
• Applications including HTS superconducting motor, powertransmission line and power generator are usually consideredto consume 100 W to 10,000 W cooling power.
• Most of those applications are currently using direct liquidnitrogen cooling or Turbo-Brayton cryocoolers. Thoughhaving the potential to significantly reduce the cost andspace requirement, current commercial GM cryocoolers lackthe suitable cooling power which is crucial in HTSapplications.
• Since 2013, Sumitomo Heavy Industries, Ltd. (SHI) has beendeveloping high capacity single stage GM cryocoolers for HTSapplications around 80 K.
• GM cryocoolers with a conventional scotch-yoke-drivensingle-displacer, a dual-displacer and a pneumatic dual-displacer were developed.
Introduction
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IWC-HTS 2017, OR5-4
P.5
• Introduction
• Scotch-yoke-driven Single-displacer GM cryocooler
• Scotch-yoke-driven dual-displacer GM cryocooler
• Pneumatic dual-displacer GM cryocooler
• Conclusions
Contents
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P.6
Single-displacer GM Cryocooler
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P.7
Schematic
Displacer
RegeneratorSlipper seal
Cylinder Compression room
Expansion room
High pressure
valve
Low pressure
valve
Scotch yoke
Compressor
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P.8
Cooling Performance
• a cooling capacity of 650 W was achieved withan input power of about 13 kW
Bao Q, Xu M Y and Yamada K, Cryocoolers 19 (2016), pp.
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IWC-HTS 2017, OR5-4
P.9
• Introduction
• Scotch-yoke-driven Single-displacer GM cryocooler
• Scotch-yoke-driven dual-displacer GM cryocooler
• Pneumatic dual-displacer GM cryocooler
• Conclusions
Contents
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IWC-HTS 2017, OR5-4
P.10
Scotch-yoke-driven Dual-displacer GM Cryocooler
Displacer
Regenerator
Slipper seal
Cylinder Compression room
Expansion room
High pressureLow
pressure
Scotch yoke
Expansion room
Displacer
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P.11
Ph
Pl
Ph
Pl
Upper expander
Lower expander
Supply
SupplyDischarge
Discharge
180°0° 360°
Valve timing, Pressure and P-V Power
Single displacer
Dual-displacer ・ Conventional GMx2494W@80K/13.5kW
・ Dual-displacer GMx1560W@80K/13.5kW
Cooling capacity 66Wup, efficiency 13% up
P-V
Pressure in expansion rooms
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P.12
・ After optimization, a cooling capacity of 725W@80K was achieved with an input power of 13.8 kW
Cooling Performance
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IWC-HTS 2017, OR5-4
P.13
• Introduction
• Scotch-yoke-driven Single-displacer GM cryocooler
• Scotch-yoke-driven dual-displacer GM cryocooler
• Pneumatic dual-displacer GM cryocooler
• Conclusions
Contents
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IWC-HTS 2017, OR5-4
P.14ICC17 WO3-1
Pneumatic Dual-displacer GM Cryocooler
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P.15
Pressure, Displacement
・ a cooling capacity of 700 W at 80 K was achieved with an input power of 18.0 kW.
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IWC-HTS 2017, OR5-4
P.16
• Introduction
• Scotch-yoke-driven Single-displacer GM cryocooler
• Scotch-yoke-driven dual-displacer GM cryocooler
• Pneumatic dual-displacer GM cryocooler
• Conclusions
Contents
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IWC-HTS 2017, OR5-4
P.17
• With a conventional scotch-yoke-driven single-displacer GM cryocooler, a cooling capacity of 650W was achieved with an input power of about 13kW.
• With a scotch-yoke-driven dual-displacer concept, acooling capacity of 725 W at 80 K was achievedwith an input power of 13.8 kW.
• With a pneumatic dual-displacer concept, a coolingcapacity of 700 W at 80 K was achieved with aninput power of 18.0 kW.
Conclusions
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IWC-HTS 2017, OR5-4
P.18CEC-ICMC 2013 4EOrB3-02
Thank you!
