Liquid Piston Stirling Engine with Linear Generator

• US 20190323451A1
• Filed: 04/22/2019
• Published: 10/24/2019
• Est. Priority Date: 04/20/2018
• Status: Active Grant

• Current Assignee: Stratum Ventures, LLC
• Original Assignee: Stratum Ventures, LLC
• Inventors: Goyette, Donald
• Granted Patent: US 10,774,783 B2
• Time in Patent Office: Days
• CPC Class Codes: F02G 1/053 Component parts or details
• CPC Class Codes: F02G 2243/36 with twin-expansion cylinders, e.g. "Rainbow" engines
• CPC Class Codes: F02G 2270/30 Displacer assemblies
• CPC Class Codes: F02G 2270/70 Liquid pistons
• CPC Class Codes: F02G 2280/10 Linear generators

Abstract

A liquid piston Stirling engine electrical generator, the generator being a linearly reciprocating electrical generator that is powered by a Stirling engine having a liquid piston that is displaced by the cyclic contraction and expansion of a gas resulting from increases and decreases in temperature. The liquid piston and dynamic components of the linear generator are retained within a U-shaped tube or chamber, the tube being oriented in use to consist of a two upwardly extending, first and second vertical segments joining a horizontal segment. A liquid, such as oil or hydraulic fluid, is present in sufficient quantity to fill the horizontal segment and extend upward into the vertical segments.

Claims

1. A liquid piston Stirling engine linear generator device comprising:

a U-shaped chamber having a first vertical segment and a second vertical segment joined by a horizontal segment;

a liquid piston comprising a liquid occupying said horizontal segment, a portion of said first vertical segment and a portion of said second vertical segment;

a cycle head of a Stirling engine connected to and in fluid communication with said first vertical segment;

a gas spring chamber connected to and in fluid communication with said second vertical segment;

a first volume gas occupying said cycle head and in contact with said liquid occupying said first vertical segment, and a second volume gas occupying said gas spring chamber and in contact with said liquid occupying said second vertical segment;

a slider disposed within said horizontal segment, said slider able to move in reciprocating manner within said horizontal segment;

magnets disposed on said slider; and

a stator comprising wire coils annularly encircling said horizontal segment;

whereby expansion and contraction of said first volume gas upon operation of said cycle head results in reciprocal movement of said slider relative to said wire coils such that electrical current is generated.

2. The device of claim 1, said slider having a transverse cross-sectional configuration and said horizontal segment having a transverse cross-sectional configuration, wherein said slider transverse cross-sectional configuration corresponds to said horizontal segment transverse cross-sectional configuration.

3. The device of claim 2, wherein said slider transverse cross-sectional configuration and said horizontal segment transverse cross-sectional configuration preclude rotational movement of said slider within said horizontal segment.

4. The device of claim 3, wherein said slider comprises a bridging member connecting two lobes to form a pair of channels, and wherein said magnets are disposed within said channels.

5. The device of claim 1, wherein said liquid is chosen from the group of liquids consisting of hydraulic fluid and oil.

6. The device of claim 1, wherein said cycle head comprises a rotary displacer.

7. The device of claim 1, wherein said slider is disposed within said liquid piston.

8. The device of claim 1, wherein said stator is disposed on said horizontal segment.

9. The device of claim 1, wherein said stator is comprised of a portion of said horizontal segment.

10. A liquid piston Stirling engine linear generator device comprising:

a U-shaped chamber having a first vertical segment and a second vertical segment joined by a horizontal segment, said U-shaped chamber structured to retain a liquid;

a liquid piston comprising an essentially non-compressible liquid occupying said horizontal segment, a portion of said first vertical segment and a portion of said second vertical segment;

a cycle head of a Stirling engine connected to and in fluid communication with said first vertical segment, said cycle head comprising a hot side heat exchanger, a cold side heat exchanger and a displacer;

a gas spring chamber connected to and in fluid communication with said second vertical segment;

a first volume gas occupying said cycle head and in contact with said liquid occupying said first vertical segment, and a second volume gas occupying said gas spring chamber and in contact with said liquid occupying said second vertical segment;

a slider disposed within said horizontal segment and within said liquid piston, said slider retaining magnets and able to move in reciprocating manner within said horizontal segment; and

a stator disposed on or formed as part of said horizontal segment, said stator comprising wire coils annularly encircling said horizontal segment and surrounding said slider;

said slider having a transverse cross-sectional configuration and said horizontal segment having a transverse cross-sectional configuration, wherein said slider transverse cross-sectional configuration corresponds to said horizontal segment transverse cross-sectional configuration;

whereby expansion and contraction of said first volume gas upon operation of said cycle head results in reciprocal movement of said liquid piston within said U-shaped chamber and reciprocal movement of said slider relative to said wire coils such that electrical current is generated.

11. The device of claim 10, wherein said slider transverse cross-sectional configuration and said horizontal segment transverse cross-sectional configuration preclude rotational movement of said slider within said horizontal segment.

12. The device of claim 11, wherein said slider comprises a bridging member connecting two lobes to form a pair of channels, and wherein said magnets are disposed within said channels.

13. The device of claim 10, wherein said liquid is chosen from the group of liquids consisting of hydraulic fluid and oil.

14. The device of claim 10, wherein said cycle head comprises a rotary displacer.

15. The device of claim 10, wherein said stator is disposed on said horizontal segment.

16. The device of claim 10, wherein said stator is comprised of a portion of said horizontal segment.