Title: Thermal energy storage and power generation systems and methods

Abstract

A solar power system and materials capable of storing heat energy by thermochemical energy storage are disclosed. Thermal energy is stored as chemical potential in these materials through a reversible reduction-oxidation reaction. Thermal energy from concentrated sunlight drives a highly endothermic reduction reaction that liberates lattice oxygen from the oxide to form O.sub.2 gas, leaving energy-rich, oxygen-depleted particles. When desired, the heat is recovered as the particles are re-oxidized in an exothermic reaction upon exposure to air. The system may be integrated with a power generation system to generate power.

Inventors:

Ambrosini, Andrea; Miller, James E.; Gill, David D.

Issue Date:

Tue Oct 23 00:00:00 EDT 2018

Research Org.:

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1491254

Patent Number(s):

10107268

Application Number:

14/846,201

Assignee:

National Technology & Engineering Solutions of Sandia, LLC (Albuquerque, NM)

Patent Classifications (CPCs):

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01G - COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01P - INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

Show more

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01G - COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F

C01G45/125 - {of the type[MnO3]n-, e.g. Li2MnO3, Li2[MxMn1-xO3],
C01G45/1264 - {containing rare earth, e.g. La1-xCaxMnO3, LaMnO3}
C01G49/009 - {Compounds containing, besides iron, two or more other elements, with the exception of oxygen or hydrogen}
C01G51/006 - {Compounds containing, besides cobalt, two or more other elements, with the exception of oxygen or hydrogen

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01P - INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

C01P2002/34 - perovskite-type
C01P2002/72 - by d-values or two theta-values, e.g. as X-ray diagram
C01P2006/90 - Other properties not specified above

C - CHEMISTRY C09 - DYES C09K - MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

C09K5/16 - Materials undergoing chemical reactions when used

F - MECHANICAL ENGINEERING F03 - MACHINES OR ENGINES FOR LIQUIDS F03G - SPRING, WEIGHT, INERTIA OR LIKE MOTORS

F03G6/003 - {having a Rankine cycle
F03G6/064 - {having a gas turbine cycle, i.e. compressor and gas turbine combination}

F - MECHANICAL ENGINEERING F28 - HEAT EXCHANGE IN GENERAL F28D - HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT

F28D20/003 - {using thermochemical reactions}

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

Y02E10/46 - Conversion of thermal power into mechanical power, e.g. Rankine, Stirling solar thermal engines
Y02E60/14 - Thermal storage

Show less

DOE Contract Number:  

AC04-94AL85000

Resource Type:

Patent

Resource Relation:

Patent File Date: 2015 Sep 04

Country of Publication:

United States

Language:

English

Subject:

25 ENERGY STORAGE; 36 MATERIALS SCIENCE