Electrical generator or motor structure – Dynamoelectric – Conducting fluid
Patent
1993-06-30
1997-03-25
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Conducting fluid
H02K 4412
Patent
active
056147732
ABSTRACT:
Two-phase LMMHD energy conversion systems have potentially significant advantages over conventional systems such as higher thermal efficiency and substantial simplicity with lower capital and maintenance costs. Maintenance of low velocity slip is of importance for achieving high generator efficiency. A bubbly flow pattern ensures very low velocity slip. The full governing equations have been written out, and a computer prediction code has been developed to analyze performance of a two-phase flow LMMHD generator and nozzle under conditions of no slip. Three different shapes of an LMMHD generator have been investigated. Electrical power outputs are in the 20 kW range. Generator efficiency exceeds 71 percent at an average void fraction of about 70 percent. This is an appreciable performance for a short generator without insulating vanes for minimizing electrical losses in the end regions.
REFERENCES:
patent: 4047094 (1977-09-01), Rosa
patent: 4151423 (1979-04-01), Hendel
patent: 4180752 (1979-12-01), Gorlin et al.
patent: 4218629 (1980-08-01), Kayukawa et al.
patent: 4260913 (1981-04-01), Bitjurin et al.
patent: 4317057 (1982-02-01), Bazarov et al.
patent: 4328436 (1982-05-01), Biblarz et al.
patent: 4388542 (1983-06-01), Lee et al.
patent: 4430588 (1984-02-01), Way et al.
patent: 4450361 (1984-05-01), Holt
patent: 4454436 (1984-06-01), Last et al.
patent: 4608627 (1986-08-01), Holt
patent: 4847525 (1989-07-01), Sukoriansky et al.
patent: 5026681 (1991-06-01), Hed
patent: 5091118 (1992-02-01), Burgher
patent: 5236649 (1993-08-01), Fabris
Fabris, B., and R.G. Hantman, "Interaction of Fluid Dynamics Phenomena and Generator Efficiency in Two-Phase Liquid-Metal Gas Magnetohydrodynamic Power Generators," Energy Conversion and Management: An International Journal 21:49-60, 1981 (month unknown).
Fabris, G., and E.S. Pierson, "The Role of Interfacial Heat and Mechanical Energy Transfers in a Liquid-Metal MHD Generator," Energy Conversion: An International Journal, 19:101-118, 1979 (month unknown).
Fabris, G., "Formulation of the Slip Loss in a Two-Phase Liquid-Metal Magnetohydrodynamic Generator," Progress in Astronautics and Aeronautics 84:218-224, 1983 (month unknown).
Fabris, G. et al., "Two-Phase Flow Bubbly Mixing for Liquid Metal Magnetohydrodynamic Energy Conversion," Proceedings of the 25th Intersociety Energy Conversion Engineering Conference 2:486-493, Reno, Nevada, 1990 Aug.
Fabris, G., "Discussions on Liquid Metal Magnetohydrodynamics," Proceedings of the 6th International Conference on Magnetohydrodynamics Electric Power Generation VI:427 Washington, DC, 1975 Jun.
Tanatugu, N. et al., "Electrical Conductivity of Liquid Metal Two-Phase Mixture in Bubbly and Slug Flow Regime," Journal of Nuclear Science and Technology 9(12):57-59, Dec. 1972.
Gherson, P. et al., "Analytical Study of End Effects in Liquid Metal MHD Generators," School of Nuclear Engineering, Dept. of Mathematical Science, Purdue Univ., Lafayette, IN, 1978, pp. 590-594 (month unknown).
Branover, H., Magnetohydrodynamic Flow in Ducts, John Wiley & Sons, New York, 1978. pp. 49-56, 71-102, 241-271 (month unknown).
Moszynski, J.R., "Reduction of Electrical End Losses in MHD Generator Channels by Insulating Vanes," Argonne National Laboratory, Report 7188, 1967 Sep.
Fabris, G., and L. Back, "Prediction of Performance of Two-Phase Flow Nozzle and Liquid Metal Magnetohydrodynamic (LMMHD) Generator for No Slip Condition," Jet Propulsion Laboratory, Calif. Institute of Technology, Aug. 5, 1992.
California Institute of Technology
Carlson David V.
Jones Judson H.
Stephan Steven L.
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