Inertial Energy Storage for High-Speed and Short-Time Electrical Supply pra-0099

Full Title Improvement of Inertial Energy Storage for High-Speed Installations for Short-Time Electrical Supply Tech Area / Field

• NNE-MEC: Non-Nuclear Energy / Miscellaneous Energy Conversion

• MAN-MCH: Manufacturing Technology / Machinery and Tools

• OTH-ELE: Other / Electrotechnology

Brief Description of Technology Short-time electrical supply installations play an important role in such spheres as time maintenance of voltage during break-downs, in power supply systems for electrophysical installations (e.g. tokamaks and arc gas heaters) and electromobile transport. A flywheel, made by metallic forging, is usually used as the energy storage element. There are two main directions for the improvement of inertial energy storage. The first is connected to the production of flywheels with a relatively low mass index (g/J) for energy transport equipment. A tungsten flywheel for an experimental test-bench has been manufactured at our institute (mass: 4 t, diameter: 1820 mm, rotational speed: 6000 RPM). It was necessary to develop a special technology for the production and the elaboration of titanium forging. The second direction is connected to the maximum rise of energy accumulated in one flywheel installation. Today, the energy storage of one horizontal flywheel made from alloyed steel for installations with a rotational speed of 3000 RPM is not higher than 10⁹ Joule. The flywheels were manufactured by the joint-stock company “Izhorskie Zavodi” (5 flywheels with an overall mass of 81 t).

Legal Aspects The flywheels were constructed and manufactured according to technical standards. They were used in unique installations for the electric supply for large tokamaks. Author certificate “Steel” (USSR N 1317904, 1987).

Special Facilities in Use and Their Specifications Full complex of equipment for the investigation of the physical and mechanical properties of steel forgings.

There is a disk with a diameter of 2,000 mm and a thickness of 600 mm, made from highly pure steel, from which experimental flywheels with a fluidity limit of 850 Mpa can be produced.

Scientific Papers P.G. Rutberg, E.G. Kasharsky, M.Yu. Platonova, G. M. Hutoretsky. Technical Decision Choices in the Creation of Power Sources, Including Synchronous Flywheel Generators. Applied Energy, V 33, N5, 1995, pp.56-59, NY.

P.G. Rutberg, E.G. Kasharsky, M.Yu. Platonova, G.B. Pinsky. Perspectives of the Creation of Flywheel Generators of Short Time Action on the Basis of Household Hydroelectric Generators. Annotation of the Reports of 6th Conference on “Engineering Problems of Thermonuclear Reactors”. May 27-29, 1997, St. Petersburg.

I.A. Glebov, E.G. Kasharsky, N.N. Kustov. Materials for Inertial Energy Storage. Isvestia AN USSR, Energetics and Transport, 1982, N1, pp.32-37.

R.B. Goncharenko, E.G. Kasharsky, N.N. Kustov, P.A. Rovinsky. Traction Transmission, Including Flywheels, for a Large Electromobile. In the collection “Reconstruction of St. Petersburg 2005”, St. Petersburg, 1995.