Electric power generation system

Patent metadata

Field	Value
Publication number	US-9605657-B2
Application number	US-201615153829-A
Country	US
Kind code	B2
Filing date	May 13, 2016
Priority date	Oct 15, 2009
Publication date	Mar 28, 2017
Grant date	Mar 28, 2017

Abstract

An electric power generation system includes a wind turbine, a conductor rotating as the wind turbine rotates, a heat transfer medium vessel, a magnetic field generator, a heat accumulator, and an electric power generation unit. The magnetic field generator is operated to generate a magnetic field and therein the conductor is rotated and thus heated through induction, and the conductor's heat is transmitted to the water in the heat transfer medium vessel to generate steam which is in turn supplied to a steam turbine and thus drives an electric power generator to generate electric power.

First claim

The invention claimed is:

1. An electric power generation system comprising:
a wind turbine having a rotary shaft;
a conductor directly connected to said rotary shaft of said wind turbine and rotating as said wind turbine rotates;
a magnetic field generator generating a magnetic field traversing said conductor;
a heat transfer medium receiving heat from said conductor rotated in said magnetic field and thus heated through induction; and
an electric power generation unit converting heat of said heat transfer medium into electrical energy,
wherein said magnetic field generator includes first and second magnetic poles opposite to a surface of said conductor, said first and second magnetic poles are disposed in a direction in which said conductor rotates, and said first magnetic pole has a first polarity and said second magnetic pole has a second polarity different from said first polarity.

2. The electric power generation system according to claim 1 , comprising:
a tower extending higher than a position of said electric power generation unit;
a nacelle provided at an upper portion of said tower and provided with said wind turbine, said conductor and said magnetic field generator;
a heat transfer medium vessel disposed in said nacelle and having accommodated therein said heat transfer medium receiving heat from said conductor; and
a transport pipe delivering heat of said heat transfer medium in said heat transfer medium vessel to said electric power generation unit.

3. The electric power generation system according to claim 1 , wherein said electric power generation unit has a turbine rotated by a working fluid having heat from said heat transfer medium, and an electric power generator driven by said turbine.

4. The electric power generation system according to claim 1 , comprising a heat accumulator accumulating the heat of said heat transfer medium.

5. The electric power generation system according to claim 1 , wherein said conductor has a portion provided with a magnetic substance.

6. The electric power generation system according to claim 1 , wherein said magnetic field generator has a coil generating a magnetic field.

7. The electric power generation system according to claim 6 , wherein said coil is a superconducting coil.

8. The electric power generation system according to claim 1 , wherein said magnetic field generator generates a revolving magnetic field revolving in a direction opposite to that in which said conductor rotates.

9. The electric power generation system according to claim 1 , wherein said first and second magnetic poles are oppositely disposed with said conductor posed therebetween.

10. The electric power generation system according to claim 1 , wherein at least three magnetic poles including said first and second magnetic poles are disposed in said direction in which said conductor rotates such that said first polarity and said second polarity are alternately disposed in said direction in which said conductor rotates.

11. The electric power generation system according to claim 3 , further comprising a heat exchanger which exchanges heat between said heat transfer medium and said working fluid.

12. The electric power generation system according to claim 1 , wherein said heat transfer medium is water, oil, a molten salt, or a liquid metal.

13. The electric power generation system according to claim 4 , wherein said heat accumulator is a steam accumulator.

14. The electric power generation system according to claim 4 , wherein said heat accumulator is a heat accumulator of a sensible heat type.

15. The electric power generation system according to claim 4 , wherein said heat accumulator is a heat accumulator of a latent heat type.

Assignees

• Sumitomo Electric Industries

Inventors

• Okazaki Toru

Classifications

• H02K7/1823

  structurally associated with turbines or similar engines · CPC title

• H05B6/109

  using magnets rotating with respect to a susceptor · CPC title

• Y02E10/721

  Cross-Sectional Technologies · mapped topic

• F01D15/10

  Adaptations for driving, or combinations with, electric generators · CPC title

• Y02E10/725

  Cross-Sectional Technologies · mapped topic