Heat shields for alkali metal thermal to electric conversion (AM

Batteries: thermoelectric and photoelectric – Thermoelectric – Peltier effect device

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H01L 3528

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active

059293713

ABSTRACT:
The present invention provides an alkali metal thermal to electric conversion (AMTEC) cell of the type employing an alkali metal flowing between a high-pressure zone and low-pressure zone in the cell through a solid electrolyte structure. The cell preferably includes a condenser communicating with the low-pressure zone for condensing alkali metal vapor migrating through the low-pressure zone from the solid electrolyte structure. An artery is coupled to the condenser for directing condensed alkali metal from the condenser toward a hot end of the cell. An evaporator for evaporating the condensed alkali metal is coupled to the artery and communicates with the high-pressure zone. A heat shield is disposed in the low pressure zone of the cell for reducing the radiative heat transfer between the hot end of the cell and the cold end of the cell. The heat shield preferably includes a first end having a known area transitioning to a second end encompassing a smaller area than the first end.

REFERENCES:
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patent: 4098958 (1978-07-01), Bettman
patent: 4808240 (1989-02-01), Sievers
patent: 4948679 (1990-08-01), Hunt et al.
patent: 5085948 (1992-02-01), Tsukamoto et al.
patent: 5228922 (1993-07-01), Sievers
"Performance Analysis of a Multitube Vapor-Anode AMTEC Cell", Tournier, Jean-Michel, El-Genk, Mohamed S., Huang, Lianmin, and Schuller, Michael, Institute for Space and Nuclear Power Studies, Dept. of Chemical and Nuclear Engineering, The University of New Mexico Albuquerque, NM, and Power Systems Branch, Phillips Laboratory, Kirtland AFB, Albuquerque, NM, Document No. 97-378. No Date Available.
"Thermal Modeling of High Efficiency AMTEC Cells", Ivanenok, Joseph F. III, Sievers, R.K., and Crowley, C.J., Advanced Modular Power Systems, Inc., Ann Arbor, MI, and Creare, Inc., Hanover NH. No Date Available.
"The Effect of Radiation Shields on Power and Efficiency of an Internally Heated AMTEC Cell", Weber, Neill, Rasmussen, James R., Olsen, Scott L., Beta Power, Inc., Document No. 929147. No Date Available.
"Parasitic Heat Loss Reduction in AMTEC Cells By Heat Shield Optimization", Borkowski, C.A., Svedberg, R.C., and Hendricks, T.J., Advanced Modular Power Systems, Inc., Ann Arbor, MI, Document No. 97420. No Date Available.
"Series II AMTEC Cell Design and Development", Sievers, R.K., Pantolin, Jan E., Svedberg, R.C., Butkiewicz, David A., Huang, C., Hendricks, T.J., and Hunt, T.K., Advanced Modular Power Systems, Inc., Ann Arbor, MI, Document No. 97335. No Date Available.
"Vacuum Testing of High Efficiency Multi-Tube AMTEC Cells", Merril, John M., Schuller, Michael J., Sievers, Robert, Borkowski, Chris, Huang, Lianmin, and El-Genk, Mohamed S., Nichols Research Corporation, Albuquerque, NM, Phillips Laboratory/VTVP, Kirtland AFB, NM, Advanced Modular Power Systems, Inc., Ann Arbor, MI and Institute for Space Nuclear Power Studies, The University of New Mexico, Albuquerque, NM. No Date Available.
"Micromachined Evaporator for AMTEC Cells", Izenson, Michael G., and Crowley, Christopher J., Creare, Inc., Hanover, NH, Document No. 93221, .COPYRGT. American Chemical Society, 1993. No Month Available.
"A Five Volt AMTEC Multicell", Underwood, Mark L., Suitor, Jerry W., Williams, Roger M., Ryan, Margaret A., Jeffries-Nakamura, Barbara, and O'Connor, Dennis, Jet Propulsion Laboratory, Pasadena, CA, Document No. 93471, .COPYRGT. American Chemical Society, 1993. No Month Available.
"Component Selection, Accelerated Testing, and Improved Modeling of AMTEC Systems for Space Power", Williams, R.M., Jeffries-Nakamura, Barbara, Ryan, Margaret A., Underwood, Mark L. Suitor, Jerry W., and O'Connor, Dennis, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, Document No. 93197, .COPYRGT. American Chemical Society, 1993. No Month Available.
"Emissivities and Thermal Characterization of Components for AMTEC Cells", Ryan, Margaret A., Kisor, A., Williams, R.M., Jeffries-Nakamura, Barbara, Underwood, Mark L., and O'Connor, Dennis, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, Document No. 93322, .COPYRGT. American Chemical Society, 1933. No Month Available.
"Research Program on a One KWe Sodium Heat Engine (SHE) System--Final Technical Report for Phase 5", Hunt, Thomas K., Ford Motor Company Research Staff, Dearborn, MI, Sep. 18, 1989.

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