Effective and scalable solar energy collection and storage

Patent metadata

Field	Value
Publication number	US-9705449-B2
Application number	US-201214345933-A
Country	US
Kind code	B2
Filing date	Sep 28, 2012
Priority date	Sep 28, 2011
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

Abstract

Solar energy collection and storage systems and processes of using such systems. Non-direct solar energy collection and storage systems can generate electricity from solar radiation using a solar thermoelectric generator and at the same time capture solar thermal energy in a working fluid. The working fluid can then transfer the heat to a thermal storage medium where the heat can be retrieved on demand to generate electricity and heat a fluid. Direct solar energy collection and storage systems can store solar thermal energy in a thermal storage medium directly from solar radiation and the heat from the thermal storage medium can be used on demand to generate electricity and heat a fluid.

First claim

We claim:

1. A solar energy collection and storage system, comprising:
a first energy converter with a first side and a second side;
a solar radiation concentrator so as to concentrate solar radiation on the first side of the first energy converter;
a first heat exchanger attached to the second side of the first energy converter, wherein a first fluid moves through the first heat exchanger and then through a thermal storage medium;
a second energy converter with a first side and a second side;
a second heat exchanger attached to the first side of the second energy converter, wherein a second fluid moves through the thermal storage medium and then through the second heat exchanger, the thermal storage medium configured to allow the first fluid to move through the thermal storage medium without coming into contact with the second fluid;
a fluid storage vessel configured to allow the second fluid to move through without coming into contact with a third fluid; and
a third heat exchanger attached to the second side of the second energy converter, wherein the third fluid moves through the third heat exchanger and then into the fluid storage vessel.

2. The solar energy collection and storage system of claim 1 , wherein the thermal storage medium contains a plurality of channels configured for at least one of allowing fluid to move through and resembling blood vessels.

3. The solar energy collection and storage system of claim 1 , wherein the thermal storage medium comprises at least one of a solid, a gel, and a phase change material.

4. The solar energy collection and storage system of claim 1 , wherein the first energy converter is at least one of a solar thermoelectric generator and a photovoltaic electrical generator.

5. The solar energy collection and storage system of claim 1 , wherein the second energy converter is a thermoelectric generator.

6. The solar energy collection and storage system of claim 1 , wherein the first fluid returns to the first heat exchanger after exiting the thermal storage medium.

7. The solar energy collection and storage system of claim 1 , further comprising a controlled switch configured to change on demand the direction of the second fluid exiting the second heat exchanger to flow through the fluid storage vessel or to bypass the fluid storage vessel.

8. The solar energy collection and storage system of claim 7 , wherein the second fluid returns to the thermal storage medium after exiting the fluid storage vessel when the controlled switch changes on demand the direction of the second fluid exiting the second heat exchanger to flow through the fluid storage vessel.

9. A process of collecting and storing solar energy, the process comprising:
concentrating solar radiation on a first side of a first energy converter;
generating electricity via the first energy converter;
heating a first fluid by moving the first fluid through a first heat exchanger that is attached to a second side of the first energy converter;
storing the heated first fluid in a thermal storage medium;
moving the heated first fluid through a second heat exchanger that is attached to a first side of a second energy converter;
generating electricity via the second energy converter;
heating a second fluid by moving the second fluid through a third heat exchanger that is attached to a second side of the second energy converter; and
storing the heated second fluid in a fluid storage vessel, wherein the first fluid moves through the fluid storage vessel after exiting the second heat exchanger to further heat the second fluid.

10. A process of collecting and storing solar energy, the process comprising:
concentrating solar radiation on a first side of a first energy converter;
generating electricity via the first energy converter;
heating a first fluid by moving the first fluid through a first heat exchanger that is attached to a second side of the first energy converter;
heating a thermal storage medium with the heated first fluid;
heating a second fluid by moving the second fluid through the thermal storage medium;
moving the second fluid through a second heat exchanger that is attached to a first side of a second energy converter;
generating electricity via the second energy converter;
heating a third fluid by moving the third fluid through a third heat exchanger that is attached to a second side of the second energy converter; and
storing the heated third fluid in a fluid storage vessel, wherein the second fluid moves through the fluid storage vessel after exiting the second heat exchanger to further heat the third fluid.

11. The process of collecting and storing solar energy of claim 10 , wherein the first energy converter is at least one of a solar thermoelectric generator and a photovoltaic electrical generator.

12. The process of collecting and storing solar energy of claim 10 , further comprising reusing the first fluid in the first heat exchanger after the first fluid exits the thermal storage medium.

13. The process of collecting and storing solar energy of claim 10 , further comprising tracking a solar radiation source and moving a solar radiation concentrator to be perpendicular to the solar radiation source.

Assignees

• Univ California

Inventors

• Yazawa Kazuaki
• Bian Zhixi
• Shakouri Ali

Classifications

• F24S10/20

  having circuits for two or more working fluids (with means for exchanging heat between two or more fluids F24S10/30) · CPC title

• F28D20/02

  using latent heat · CPC title

• Y02E10/60

  Thermal-PV hybrids · CPC title

• Y02E10/40

  Solar thermal energy, e.g. solar towers · CPC title

• F24S10/30

  with means for exchanging heat between two or more working fluids · CPC title