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Title: High temperature synthesis for power production and storage

Abstract

Thermochemical energy storage (TCES) for concentrating solar power (CSP) systems provides higher energy density than sensible energy storage systems. An ammonia-based TCES system dissociates endothermically into hydrogen and nitrogen. The stored energy is released when supercritical hydrogen and nitrogen react exothermically to synthesize ammonia. Prior ammonia synthesis systems are unable to produce temperatures consistent with modern power blocks requiring a working fluid, for example steam or carbon dioxide, to be heated to greater than 600° C., for example about 650° C. An ammonia synthesis system heats steam from, for example 350° C. to 650° C. under pressure of about 26 MPa. The hydrogen and nitrogen are preheated with a flow of supercritical fluid prior to the synthesis step to provide reaction rates sufficient to heat power block working fluid to the desired temperature.

Inventors:
; ; ; ;
Issue Date:
Research Org.:
Univ. of California, Oakland, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1650856
Patent Number(s):
10641524
Application Number:
15/739,125
Assignee:
The Regents of the University of California (Oakland, CA)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F24 - HEATING F24S - SOLAR HEAT COLLECTORS
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
DOE Contract Number:  
EE0006536
Resource Type:
Patent
Resource Relation:
Patent File Date: 06/27/2016
Country of Publication:
United States
Language:
English

Citation Formats

Lavine, Adrienne Gail, Wirz, Richard Edward, Aryafar, Hamarz, Chen, Chen, and Lovegrove, Keith Malcolm. High temperature synthesis for power production and storage. United States: N. p., 2020. Web.
Lavine, Adrienne Gail, Wirz, Richard Edward, Aryafar, Hamarz, Chen, Chen, & Lovegrove, Keith Malcolm. High temperature synthesis for power production and storage. United States.
Lavine, Adrienne Gail, Wirz, Richard Edward, Aryafar, Hamarz, Chen, Chen, and Lovegrove, Keith Malcolm. Tue . "High temperature synthesis for power production and storage". United States. https://www.osti.gov/servlets/purl/1650856.
@article{osti_1650856,
title = {High temperature synthesis for power production and storage},
author = {Lavine, Adrienne Gail and Wirz, Richard Edward and Aryafar, Hamarz and Chen, Chen and Lovegrove, Keith Malcolm},
abstractNote = {Thermochemical energy storage (TCES) for concentrating solar power (CSP) systems provides higher energy density than sensible energy storage systems. An ammonia-based TCES system dissociates endothermically into hydrogen and nitrogen. The stored energy is released when supercritical hydrogen and nitrogen react exothermically to synthesize ammonia. Prior ammonia synthesis systems are unable to produce temperatures consistent with modern power blocks requiring a working fluid, for example steam or carbon dioxide, to be heated to greater than 600° C., for example about 650° C. An ammonia synthesis system heats steam from, for example 350° C. to 650° C. under pressure of about 26 MPa. The hydrogen and nitrogen are preheated with a flow of supercritical fluid prior to the synthesis step to provide reaction rates sufficient to heat power block working fluid to the desired temperature.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {5}
}

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Works referenced in this record:

Steam turbine power-generation plant and steam turbine
patent, October 2000


Storage capacity in hot dry rock reservoirs
patent, November 1997


Method for converting solar thermal energy
patent, September 2012


Combustion turbine fuel inlet temperature management for maximum power outlet
patent, July 2003