Electrical power generation system using renewable energy

Patent metadata

Field	Value
Publication number	US-9835133-B2
Application number	US-201514631765-A
Country	US
Kind code	B2
Filing date	Feb 25, 2015
Priority date	Aug 22, 2013
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

The electrical power generation system using renewable energy is particularly adapted to provide electrical power to an independent or remotely situated electrical device such as a street light, emergency call box, or illuminated road sign. The system includes a pivotally mounted venturi with vanes assuring that the venturi is oriented into the prevailing wind. A vertical axis wind turbine is installed in the venturi throat, and drives a shaft extending through the column upon which the venturi is installed to a generator at the base of the column. The venturi and vanes may include photovoltaic cells thereon for further electrical power. The venturi may be heated from a geothermal source, and may include a variable diameter internal wall to adjust the cross-sectional area of the throat of the venturi. The use of functionally graded materials and other phase change materials may also improve the performance of the device.

First claim

We claim:

1. An electrical power generation system using renewable energy, comprising:
a venturi having an inner wall, an outer wall spaced from the inner wall, an inlet, and a throat, the throat having a smaller diameter than a diameter of the inlet, wherein the outer wall of the venturi is substantially rigid, the inner wall of the venturi is substantially flexible and diametrically adjustable, and the outer wall and the inner wall extend completely about the entire venturi;
a vertical axis wind turbine disposed entirely within the smaller diameter throat of the venturi to generate electrical power by rotation of the wind turbine by air flowing through the throat of the venturi; and
geothermal heating means communicating with the outer wall of the venturi to convectively heat the air flowing through the venturi to increase the velocity of the air flowing through the throat of the venturi to increase the rotational speed of the wind turbine to increase the electrical power generated by rotation of the wind turbine.

2. The electrical power generation system using renewable energy according to claim 1 , wherein the flexible, diametrically adjustable inner wall of the venturi further comprises a phase change material (PCM) including a fabric substrate coated with microspheres, the microspheres including paraffinic hydrocarbons, a surfactant, a dispersant, an anti-foam agent, and a thickener.

3. The electrical power generation system using renewable energy according to claim 1 , further including a plurality of adjustable struts disposed between the outer wall and the inner wall of the venturi substantially throughout the entirety thereof, the adjustable struts selectively adjusting the diameter of the entire inner wall of the venturi.

4. The electrical power generation system using renewable energy according to claim 1 , further comprising:
a functionally graded material (FGM) disposed within the venturi, the functionally graded material being adapted to vary the thermal insulation properties thereof according to variations in ambient temperature.

5. The electrical power generation system using renewable energy according to claim 1 , further comprising:
at least one wind vane extending from a rearward portion of the venturi; and
a plurality of photovoltaic cells disposed upon the venturi and the at least one wind vane to additionally generate electrical power.

6. The electrical power generation system using renewable energy according to claim 1 , further comprising;
a plurality of photovoltaic cells disposed upon the venturi to additionally generate electrical power.

7. An electrical power generation system using renewable energy, comprising:
a venturi having an outer wall, an inlet, and a throat, the throat having a smaller diameter than a diameter of the inlet, wherein the venturi has a substantially rigid outer wall and a substantially flexible, diametrically adjustable inner wall;
a plurality of adjustable struts disposed between the outer wall and the inner wall of the venturi substantially throughout the entirety thereof, the adjustable struts selectively adjusting the diameter of the entire inner wall;
a vertical axis wind turbine disposed entirely within the throat of the venturi; and
a phase change material (PCM) disposed within the venturi, the PCM being adapted for varying the thermal insulation properties thereof according to variations in ambient temperature to adjust the rotational speed of the vertical axis wind turbine to increase electrical power generated by rotation of the wind turbine.

8. The electrical power generation system using renewable energy according to claim 7 , further comprising:
geothermal heating means communicating with the outer wall of the venturi to convectively heat the air flowing through the venturi to increase the velocity of the air flowing through the throat of the venturi to increase the rotational speed of the vertical axis wind turbine to increase the electrical power generated by rotation of the wind turbine.

9. The electrical power generation system using renewable energy according to claim 7 , wherein the flexible, diametrically adjustable inner wall of the venturi further comprises the PCM, the PCM including a fabric substrate coated with microspheres, the microspheres including paraffinic hydrocarbons, a surfactant, a dispersant, an anti-foam agent, and a thickener.

10. The electrical power generation system using renewable energy according to claim 7 , further comprising:
at least one wind vane extending from a rearward portion of the venturi; and
a plurality of photovoltaic cells disposed upon the venturi and the at least one wind vane to additionally generate electrical power.

Assignees

• Univ King Fahd Pet & Minerals

Inventors

• Al-Garni Ahmed Z
• Aves Mohammed

Classifications

• F03D3/0418

  comprising controllable elements · CPC title

• Y02E10/74

  Wind turbines with rotation axis perpendicular to the wind direction · CPC title

• F03D3/0427 Primary

  with converging inlets, i.e. the guiding means intercepting an area greater than the effective rotor area (F03D3/0463, F03D3/049 take precedence) · CPC title

• F05B2240/12

  Fluid guiding means, e.g. vanes · CPC title

• F03D3/005 Primary

  the axis being vertical · CPC title