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Title: Performance Analysis of Thermocline Energy Storage Proposed for the 1 MW Saguaro Solar Trough Plant

Abstract

No abstract prepared.

Authors:
;
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
889911
DOE Contract Number:
AC36-99-GO10337
Resource Type:
Conference
Resource Relation:
Conference: Solar Engineering 2006: Proceedings of the ASME 2006 International Solar Energy Conference (ISEC2006), 9-13 July 2006, Denver, Colorado; Included as part of Solar 2006 (CD-ROM) containing Proceedings of 35th ASES Annual Conference, Proceedings of 31st National Passive Solar Conference, Proceedings of the 1st Renewable Energy Policy and Marketing Conference, and Proceedings of the ASME 2006 International Solar Energy Conference; Related Information: Paper no. ISEC2006-99005
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; ENERGY STORAGE; PERFORMANCE; SOLAR ENERGY; Solar Energy - Thermal

Citation Formats

Kolb, G. J., and Hassani, V.. Performance Analysis of Thermocline Energy Storage Proposed for the 1 MW Saguaro Solar Trough Plant. United States: N. p., 2006. Web.
Kolb, G. J., & Hassani, V.. Performance Analysis of Thermocline Energy Storage Proposed for the 1 MW Saguaro Solar Trough Plant. United States.
Kolb, G. J., and Hassani, V.. Sun . "Performance Analysis of Thermocline Energy Storage Proposed for the 1 MW Saguaro Solar Trough Plant". United States. doi:.
@article{osti_889911,
title = {Performance Analysis of Thermocline Energy Storage Proposed for the 1 MW Saguaro Solar Trough Plant},
author = {Kolb, G. J. and Hassani, V.},
abstractNote = {No abstract prepared.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}

Conference:
Other availability
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  • A study was performed to compare the annual performance of 50 MW{sub e} Andasol-like trough plants that employ either a 2-tank or a thermocline-type molten-salt thermal storage system. trnsys software was used to create the plant models and to perform the annual simulations. The annual performance of each plant was found to be nearly identical in the base-case comparison. The reason that the thermocline exhibited nearly the same performance is primarily due to the ability of many trough power blocks to operate at a temperature that is significantly below the design point. However, if temperatures close to the design pointmore » are required, the performance of the 2-tank plant would be significantly better than the thermocline.« less
  • Parabolic trough power systems that utilize concentrated solar energy to generate electricity are a proven technology. Industry and laboratory research efforts are now focusing on integration of thermal energy storage as a viable means to enhance dispatchability of concentrated solar energy. One option to significantly reduce costs is to use thermocline storage systems, low-cost filler materials as the primary thermal storage medium, and molten nitrate salts as the direct heat transfer fluid. Prior thermocline evaluations and thermal cycling tests at the Sandia National Laboratories' National Solar Thermal Test Facility identified quartzite rock and silica sand as potential filler materials. Anmore » expanded series of isothermal and thermal cycling experiments were planned and implemented to extend those studies in order to demonstrate the durability of these filler materials in molten nitrate salts over a range of operating temperatures for extended timeframes. Upon test completion, careful analyses of filler material samples, as well as the molten salt, were conducted to assess long-term durability and degradation mechanisms in these test conditions. Analysis results demonstrate that the quartzite rock and silica sand appear able to withstand the molten salt environment quite well. No significant deterioration that would impact the performance or operability of a thermocline thermal energy storage system was evident. Therefore, additional studies of the thermocline concept can continue armed with confidence that appropriate filler materials have been identified for the intended application.« less
  • Abstract not provided.