Systems and methods for offshore electrical energy generation

Patent metadata

Field	Value
Publication number	US-9951753-B1
Application number	US-201615158815-A
Country	US
Kind code	B1
Filing date	May 19, 2016
Priority date	May 19, 2016
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

In various embodiments, an offshore electrical energy generator is disclosed. The generator includes a buoy configured to float on a body of water. A wind turbine is mounted to the buoy. An air storage tank is configured for submersion. An air compressor is stowed within the buoy and coupled to the wind turbine and configured to charge the air storage tank in response to receiving wind energy collected by the wind turbine. An expansion turbine is stowed within the buoy and is configured to receive compressed air stored within the air storage tank and to decompress the compressed air to generate electrical energy.

First claim

What is claimed is:

1. An offshore electrical energy generator, comprising:
a buoy configured to float on a body of seawater;
a wind turbine mounted to said buoy;
an air storage tank configured for submersion;
an air compressor stowed within said buoy and coupled to said wind turbine, said air compressor configured to charge said air storage tank in response to receiving wind energy collected by said wind turbine; and
an expansion turbine stowed within said buoy, said expansion turbine configured to receive compressed air stored within said air storage tank and to decompress the compressed air to generate electrical energy;
a first thermal jacket configured to enclose and cool said air compressor, wherein said first thermal jacket is a bronze or stainless steel envelop;
a second thermal jacket configured to enclose and heat said expansion turbine, wherein said second thermal jacket is a bronze or stainless steel envelop;
wherein said heating and cooling is by continuously flushing said first thermal jacket and said second thermal jacket with seawater during operation.

2. The offshore electrical energy generator according to claim 1 , wherein said air storage tank comprises a balloon.

3. The offshore electrical energy generator according to claim 1 , wherein said air storage tank is configured to be anchored to a seabed.

4. An offshore electrical energy generating system, comprising:
a plurality of generators;
wherein each generator in said plurality of generators further comprising:
a buoy configured to float on a body of seawater;
a wind turbine mounted to said buoy;
an air compressor stowed within said buoy and coupled to said wind turbine, said air compressor configured to charge an undersea air storage tank in response to receiving wind energy collected by said wind turbine; and
an expansion turbine stowed within said buoy, said expansion turbine configured to receive compressed air stored within said undersea air storage tank and to decompress the compressed air to generate electrical energy;
a first thermal jacket configured to enclose and cool said air compressor, wherein said first thermal jacket is a bronze or stainless steel envelop;
a second thermal jacket configured to enclose and heat said expansion turbine, wherein said second thermal jacket is a bronze or stainless steel envelop;
wherein said heating and cooling is by continuously flushing said first thermal jacket and said second thermal jacket with seawater during operation.

5. The offshore electrical energy generating system according to claim 4 , wherein said plurality of generators is four generators.

6. The offshore electrical energy generating system according to claim 4 , further comprising a collector substation to which said expansion turbine is electrically-coupled and to which said expansion turbine supplies electrical energy.

7. The offshore electrical energy generating system according to claim 6 , wherein said expansion turbine supplies electrical energy to said collector substation in response to an electrical load on said collector substation.

8. The offshore electrical energy generating system according to claim 6 , wherein said expansion turbine is electrically-coupled to said collector substation by way of an undersea power line.

9. A method of offshore electrical energy generation, comprising:
collecting wind energy with an offshore, floating wind turbine;
compressing air, by an air compressor, utilizing the collected wind energy;
storing, within an air storage tank, the compressed air,
wherein a first thermal jacket encloses said air compressor, wherein said first thermal jacket is a bronze or stainless steel envelop;
releasing, on demand, the compressed air into an expansion turbine;
wherein a second thermal jacket encloses said expansion turbine, wherein said second thermal jacket is a bronze or stainless steel envelop;
cooling said air compressor during operation by continually flushing said first thermal jacket with seawater;
heating said expansion turbine during operation by continually flushing said second thermal jacket with seawater;
wherein said releasing task generates electrical energy.

Assignees

• Us Navy

Inventors

• Sinclair Nathan A
• Wilkinson David P
• Kilpatrick Jeffrey P

Classifications

• F01D25/10

  Heating, e.g. warming-up before starting · CPC title

• F01D15/10

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

• F03D9/003 Primary

  Mechanical Engineering · mapped topic

• F01D25/12

  Cooling · CPC title

• F03D9/001

  Mechanical Engineering · mapped topic