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Analysis of Once-Through Boiler Concepts in Parabolic Troughs

Feldhoff, Jan Fabian (2015) Analysis of Once-Through Boiler Concepts in Parabolic Troughs. Dissertation, RWTH Aachen.

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Abstract

Solar thermal power plants use collectors to concentrate the sunlight and heat up a fluid to high temperatures. This heat can be used to run a steam turbine and generate electricity. Such plants work similar to conventional steam power plants, with the only difference in replacing the fossil steam Generator by a solar one. The steam can directly be generated within the solar field. This direct steam generation (DSG) process is analyzed in detail for parabolic trough collectors. As in conventional power plants, there exist two main concepts, one with forced circulation during the evaporation phase and one in a once-through configuration. This work covers the complete range of solar once-through steam generators for the first time. Design criteria are derived, transient models are validated and robust control strategies for large-scale commercial plants are developed. Those are validated by experiments at a Commercial scale test facility at Plataforma Solar de Almería in Spain. Furthermore, a methodology for component life time estimation is proposed for such plants and the overall economic potential of the once-through configuration is compared to the state-of-the-art recirculation type. It is demonstrated for the first time that solar once-through steam generators are technically feasible and economically very promising.

Item URL in elib:https://elib.dlr.de/102085/
Document Type:Thesis (Dissertation)
Title:Analysis of Once-Through Boiler Concepts in Parabolic Troughs
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Feldhoff, Jan FabianJan.Feldhoff (at) dlr.dehttps://orcid.org/0000-0003-1636-5429
Date:18 December 2015
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:244
Status:Published
Keywords:concentrated solar power, CSP, direct steam Generation, DSG, parabolic trough, solar thermal power plant, once-through steam Generator, solar once-through Boiler, OTSG, steam temperature control, model predictive control, MPC, thermo-mechanical load, DNI characterisation, disturbance class
Institution:RWTH Aachen
Department:Fakultät für Maschinenwesen
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Concentrating Solar Thermal Technology
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Advanced Heat Transfer Media (old)
Location: Stuttgart
Institutes and Institutions:Institute of Solar Research > Linienfokussierende Systeme
Deposited By: Feldhoff, Dr.-Ing. Jan Fabian
Deposited On:15 Jan 2016 09:59
Last Modified:31 Jul 2019 19:59

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