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Electromagnetic Pump Fabrication and Predicted Performance

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Electromagnetic Pump Fabrication and Predicted Performance. Presented to: ... MHD Systems' ALIP Design Software and proprietary fabrication practices ... – PowerPoint PPT presentation

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Title: Electromagnetic Pump Fabrication and Predicted Performance


1
Electromagnetic Pump Fabrication and Predicted
Performance
  • Presented to
  • Nuclear and Emerging Technologies for Space

James Werner Idaho National Laboratory Harold
Adkins Pacific Northwest National Laboratory
June 16, 2009
2
Annular Linear Induction Pump (ALIP)
  • Operates in a manner similar to a polyphase
    induction motor.
  • Contains an electromagnetic stator assembly
    surrounding the annular duct assembly.
  • Power is applied to the three-phase stator
    winding,
  • a traveling wave is produced in the liquid metal
    annulus
  • this magnetic field induces voltage in the NaK
    fluid contained in the duct induced voltage
    currents will flow in the fluid.
  • currents interact with the magnetic field of the
    stator to produce a body force on the fluid,
    causing it to move through the annular duct,
    thereby developing pressure.
  • The pressure gradient at any point in the fluid
    is proportional to the magnetic field strength.
  • The total pressure rise developed by the pump is
    integral over the axial length of flow passages
    in the pump duct.

Pre-Decisional, For Discussion Purposes Only
3
Technology Heritage/Pedigree
Pre-Decisional, For Discussion Purposes Only
  • MHD Systems ALIP Design Software and proprietary
    fabrication practices
  • Represents over 35 years of development of
    electromagnetic (EM) Annular Linear Induction
    Pump (ALIP) technology
  • Software has been benchmarked and proven to be a
    highly effective predictive tool
  • Used to design and construct 55 liquid metal
    units ranging in capacity from 0.3 kg/s to 40
    kg/s (MHD Systems, Inc. 1972-1996)
  • Predictions performed by software over past 20
    years have been within 10 to 15 of actual
    post-tested unit operations (associated
    predictions typically erred on conservative side)

4
Technology Heritage/Pedigree
Pre-Decisional, For Discussion Purposes Only
  • MHD Systems ALIP Design Software and proprietary
    fabrication practices
  • Have been applied at operating temperatures
    ranges of 358K to 1116K
  • Used to developed units for Lithium, Sodium,
    Magnesium, and NaK(78)
  • In-loop and submersibles developed

5
Technology Heritage/Pedigree
Pre-Decisional, For Discussion Purposes Only
6
Technology Heritage/Pedigree
Pre-Decisional, For Discussion Purposes Only
7
Preliminary FSP ALIP Demonstration Unit
Pre-Decisional, For Discussion Purposes Only
  • Characteristics
  • Weight 82 kg
  • Length 69 cm
  • Diameter 24 cm
  • Speculated Efficiency 15
  • Source Requirements 70 volt, 36 Hz
  • Performance Requirements
  • Operating temperature 800-825K
  • Nominal Exit Pressure 194 kPa
  • Developed head pressure 58 - 68 kPa
  • Working fluid NaK(78)
  • Fluid flow 4.0 - 4.3 kg/s

8
Preliminary ALIP Demonstration Unit Construction
Goals
Pre-Decisional, For Discussion Purposes Only
  • Design Evolution of tools
  • Construction Evolution of assembly process
  • Investment to streamline future initiative

9
ALIP 3-D Model
10
ALIP component materials
  • Materials List
  • Flux Return Core Hyperco 50
  • Stator Laminates Hyperco 50
  • Coil rings Aluminum Nitrate
  • Coils Dispersion Hardened Copper
  • Mica sheet
  • Bellows SSt 304 or 347
  • Conax feed throughs SSt 316
  • Duct SSt 316
  • Housing, Flux Shell, etc. SSt 316

11
Building Stators
12
Coil Assembly
13
Pump assembly
14
Final Assembly and Shipment
15
ALIP Pressure vs. Voltage
36 Hz, NaK at 825 K with a 5.08 cm diameter inlet
/ outlet
16
ALIP Flow Rate vs. Voltage
36 Hz, NaK at 825 K with a 5.08 cm diameter inlet
/ outlet
17
ALIP Efficiency vs. Voltage
36 Hz, NaK at 825 K with a 5.08 cm diameter inlet
/ outlet
18
CONCLUSIONS
  • A new design of an ALIP pump has been completed
    that will meet the operational performance
    characteristics for Fission Surface Power (FSP)
  • Initial modeling and analysis indicate that the
    pump will be able to meet the established FSP
    design requirements
  • Because ALIP pumps have not been built for quite
    some time, it was necessary to re-establish or
    develop new fabrication, coating and assembly
    processes and identify material and component
    vendors
  • Testing will begin at NASA Marshall this summer

19
Pre-Decisional, For Discussion Purposes Only
Questions?
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