This content is not included in your SAE MOBILUS subscription, or you are not logged in.
AMTEC Cell Optimization for Advanced Radioisotope Power System (ARPS) Design
ISSN: 0148-7191, e-ISSN: 2688-3627
Published August 02, 1999 by SAE International in United States
Annotation ability available
An AMTEC cell optimization study investigated various cell design performance tradeoffs for an AMTEC cell operating in a 4-GPHS (General Purpose Heat Source) ARPS using 16 AMTEC cells per system. The design objective was to generate 141 watts at beginning-of-mission (BOM), 112 watts at 6-year end-of-mission (EOM), and 99 watts at 14-year EOM from the 4-GPHS/16-cell system at a system voltage of 28 volts (cell voltage 3.5 volts). Cell performance predictions on a system-level compared the effect of BASE tube number, BASE tube sizing, electrode performance parameters, thermal shield design, and condenser emissivity on cell-level and system- level performance. The selected reference cell design is 2 inches diameter, 4 inches length using electrodes characterized by a B=120 A-K1/2/m2-Pa and G=10, one cylindrical and 21 conical thermal radiation shields, and eight BASE tubes having a 0.40 inch diameter and 1.0 inch active length. The reference design is projected to produce a system power output of 140-143 watts at 28 volts from the 4-GPHS, 16-cell system configuration. Cell power output at a cell voltage of 3.5 volts is projected to be 8.76 - 8.95 watts/cell. The cell is capable of producing a peak power of 9.0-9.25 watts at approximately 4.0 volts per cell, so the power penalty at 3.5 volts is minimal. Equally important, the maximum BASE tube temperatures are projected to be about 818-821°C, well below the 850°C maximum specification, and evaporator temperatures are predicted to be 788-790°C for electrodes characterized by B=120 A-K1/2/m2-Pa and G=10. These relatively low temperatures will greatly alleviate material compatibility and material degradation issues within cell components.
CitationHendricks, T., Huang, C., and Huang, L., "AMTEC Cell Optimization for Advanced Radioisotope Power System (ARPS) Design," SAE Technical Paper 1999-01-2655, 1999, https://doi.org/10.4271/1999-01-2655.
- Crowley. C.J. Izenson, M.G. Wallis, P.N. 1996 Demonstration of Micromachined Condensers for AMTEC Cells Creare, Inc. Final Report #TM-1743, NASA Contract #NAS7-1241
- Cullimore, B.A. Ring, S.G. Goble, R.G. Jensen, C.L. 1997 SINDA / FLUINT - Systems Improved Numerical Differencing Analyzer and Fluid Integrator Version 4.0
- Hendricks, T.J. Huang, C. 1998 System Design Impacts on Optimization of the Advanced Radioisotope Power System AMTEC Cell Proceedings of 33rd Intersociety Energy Conversion Engineering Conference Colorado Springs, CO August 2-6, 1998 Space Energy Conversion II Session, Paper #98-I407
- Hendricks, T.J. Huang, C. Giglio, J.C. 1999 Experimental Validation of a Thermal / Fluid Dynamic / Electrical Performance Model of a Multiple- Tube, Vapor-Vapor AMTEC Cell Proceedings of 1999 International Mechanical Engineering Congress and Exposition Nashville, TN November 14- 19, 1999 paper accepted for publication
- Hendricks, T.J. Borkowski, C.A. Huang, C. 1998 Development and Experimental Validation of a SINDA / FLUINT Thermal / Fluid / Electrical Model of a Multi-Tube AMTEC Cell Proceedings of the 15th Symposium on Space Nuclear Power and Propulsion Albuquerque, NM January 25-29, 1998 American Institute of Physics New York AIP Conference Proceedings 420 3 1491 1501
- Panczak, T.D. Ring, S.G. 1998 RadCAD - CAD-Based Thermal Radiation Analyzer Version 2.1
- Ryan, M.A. Shields, V.B. Cortez, R.H. Lara, L. Homer, M.L. Williams, R.M. 1999 Lifetimes of AMTEC Electrodes: Rhodium-Tungsten and Titantium Nitride, Proceedings of the 34th Intersociety Energy Conversion Engineering Conference Vancouver, BC August 2-5, 1999 Society of Automotive Engineers
- Schock, A. Noravian, H. Or, C. Kumar, V. 1998 Improved OSC AMTEC Generator Design To Meet Goals of JPL’s Candidate Europa Orbiter Mission Proceedings of 33rd Intersociety Energy Conversion Engineering Conference Colorado Springs, CO August 2-6, 1998 Space Energy Conversion I Session, Paper #98-I245
- Williams, R.M. Loveland, M.E. Jeffries-Nakamura, B. Underwood, M.L. Bankston, C.P. Leduc, H. Kummer, J.T. 1990a Kinetics and Transport at AMTEC Electrodes - I. The Interfacial Impedance Model Journal of Electrochemical Society 137 6 1709 1716
- Williams, R.M. Jeffries-Nakamura, B. Underwood, M.L. Bankston, C.P. Kummer, J.T. 1990b Kinetics and Transport at AMTEC Electrodes - II. Temperature Dependence of the Interfacial Impedance of Na (g) / Porous Mo / Na-Beta” Alumina Journal of Electrochemical Society 137 6 1716 1723
- Underwood, M.L. Williams, R.M. Ryan, M.A. Jeffries- Nakamura, B. O’Connor, D. 1992 An AMTEC Vapor-Vapor, Series Connected Cell Proceedings of 9th Symposium on Space Nuclear Power Systems Albuquerque, NM January 1992 American Institute of Physics New York Conference Paper No. 920104 1331 1337