Chemical Energy Storage System for Solar Electric Generating System (SEGS) Solar Thermal Power Plant

1992 ◽  
Vol 114 (4) ◽  
pp. 212-218 ◽  
Author(s):  
D. R. Brown ◽  
J. L. La Marche ◽  
G. E. Spanner
Keyword(s):  
Energy Storage ◽  
Pacific Northwest ◽  
Power Plants ◽  
Storage System ◽  
Thermal Power ◽  
Chemical Energy ◽  
Solar Thermal ◽  
Solar Thermal Power ◽  
The Impact ◽  
Generating System

The Pacific Northwest Laboratory evaluated the potential feasibility of using chemical energy storage at the Solar Electric Generating System (SEGS) power plants developed by Luz International. Like sensible or latent heat energy storage systems, chemical energy storage can be beneficially applied to solar thermal power plants to dampen the impact of cloud transients, extend the daily operating period, and/or allow a higher fraction of power production to occur during high-valued peak demand periods. Higher energy storage densities make chemical energy storage a potentially attractive option. The results of the evaluation indicated that a system based on the reversible reaction, CaO + H2O = Ca(OH)2, could be technically and economically feasible for this application, but many technical and economic issues must be resolved.

Reducing the Number of Turbine Starts in Concentrating Solar Power Plants Through the Integration of Thermal Energy Storage

2014 ◽  
Vol 137 (1) ◽  
Author(s):  
Rafael Guédez ◽  
James Spelling ◽  
Björn Laumert
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Power Plants ◽  
Thermal Power ◽  
Solar Thermal ◽  
Annual Number ◽  
Thermal Power Plants ◽  
Solar Thermal Power ◽  
Solar Power Plants

The operation of steam turbine units in solar thermal power plants is very different than in conventional base-load plants. Due to the variability of the solar resource, much higher frequencies of plant start-ups are encountered. This study provides an insight to the influence of thermal energy storage (TES) integration on the typical cycling operation of solar thermal power plants. It is demonstrated that the integration of storage leads to significant reductions in the annual number of turbine starts and is thus beneficial to the turbine lifetime. At the same time, the effects of storage integration on the electricity costs are analyzed to ensure that the designs remain economically competitive. Large storage capacities, can allow the plant to be shifted from a daily starting regime to one where less than 20 plant starts occur annually. Additionally, the concept of equivalent operating hours (EOHs) is used to further analyze the direct impact of storage integration on the maintenance planning of the turbine units.

Optimal Operation Strategies for Thermal Energy Storage Systems in Solar Thermal Power Plants

2015 ◽  
Author(s):  
Louis A. Tse ◽  
Richard E. Wirz ◽  
Adrienne S. Lavine
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Thermal Power ◽  
Economic Benefits ◽  
Optimal Operation ◽  
Solar Thermal ◽  
Levelized Cost Of Electricity ◽  
Solar Thermal Power ◽  
The Impact

This paper examines the economic benefits of various operation strategies for a thermal energy storage (TES) system in a solar thermal power plant. A thermodynamic model developed to evaluate different design options has been utilized to calculate system performance and assess the impact of operation strategies, storage capacity, and market prices on the value of TES. The overall performance is also investigated through several parametric studies, such as solar multiple, geographic location, and choice of HTF. The influence of these parameters has been evaluated in consideration of exergy destruction due to heat transfer and pressure drop. By incorporating exergy-based optimization alongside traditional energy analyses, the results of this study evaluate the optimal values for key parameters in the design and operation of TES systems, as well as highlight opportunities to minimize thermodynamic losses. Annual performance for each case is characterized both by nominal and part-load efficiency. Levelized cost of electricity (LCOE) is calculated for all cases, illustrating a set of optimal parameters that yield a minimum LCOE value.

High-Temperature Solid-Media Thermal Energy Storage for Solar Thermal Power Plants

2012 ◽  
Vol 100 (2) ◽  
pp. 516-524 ◽  
Author(s):  
Doerte Laing ◽  
Carsten Bahl ◽  
Thomas Bauer ◽  
Michael Fiss ◽  
Nils Breidenbach ◽  
...  
Keyword(s):  
High Temperature ◽  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Power Plants ◽  
Thermal Power ◽  
Solar Thermal ◽  
Thermal Power Plants ◽  
Solar Thermal Power ◽  
Solid Media

Reducing the Number of Turbine Starts in Concentrating Solar Power Plants Through the Integration of Thermal Energy Storage

2013 ◽  
Author(s):  
Rafael Guédez ◽  
James Spelling ◽  
Björn Laumert ◽  
Torsten Fransson
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Power Plants ◽  
Thermal Power ◽  
Solar Thermal ◽  
Annual Number ◽  
Thermal Power Plants ◽  
Solar Thermal Power ◽  
Solar Power Plants

The operation of steam turbine units in solar thermal power plants is very different than in conventional base-load plants. Due to the variability of the solar resource, much higher frequencies of plant start-ups are encountered. This study provides an insight to the influence of thermal energy storage integration on the typical cycling operation of solar thermal power plants. It is demonstrated that the integration of storage leads to significant reductions in the annual number of turbine starts and is thus beneficial to the turbine lifetime. At the same time, the effects of storage integration on the electricity costs are analyzed to ensure that the designs remain economically competitive. Large storage capacities, can allow the plant to be shifted from a daily starting regime to one where less than 20 plant starts occur annually. Additionally, the concept of equivalent operating hours is used to further analyze the direct impact of storage integration on the maintenance planning of the turbine units.

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