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Influence of different operation strategies on transient solar thermal power plant simulation models with molten salt as heat transfer fluid

Wagner, Patrick H. and Wittmann, Michael (2014) Influence of different operation strategies on transient solar thermal power plant simulation models with molten salt as heat transfer fluid. Energy Procedia, 49, pp. 1652-1663. Elsevier. DOI: [10.1016/j.egypro.2014.03.174] ISSN 1876-6102

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Official URL: http://www.sciencedirect.com/science/article/pii/S1876610214006286

Abstract

One of the advantages of solar thermal power plants (STPPs) with molten salt as heat transfer fluid is the direct storage system. This means that the thermal energy collected by the solar field and the electric power generation can be fully decoupled. The plant operator must therefore make the daily decision when to start-up or to shut-down the power block (PB). Normally, the solar field of these STPPs is overdesigned which leads to dumping of solar energy during days with high solar radiation, due to the inability of the hot tank and the PB to consume all the collected thermal energy. The PB must therefore start as soon as possible to prevent excessive dumping of solar energy. Contrarily, on days with low solar radiation, the PB should not start too early to prevent a second start-up on this day, because of a low hot tank level. In order to operate within these counter bounds, a fixed and a dynamic operation strategy are proposed. The so-called solar-driven strategy serves as a reference. Using this strategy, the PB operates whenever the solar field is online. The two proposed operation strategies are compared to the reference strategy by means of a transient STPP simulation model. Using the dynamic operation strategy, the annual unnecessary PB start-ups and the auxiliary heater thermal energy for anti-freeze protection are decreased, whereas the annual net electricity is increased.

Item URL in elib:https://elib.dlr.de/91603/
Document Type:Article
Additional Information:Proceedings of the SolarPACES 2013 International Conference
Title:Influence of different operation strategies on transient solar thermal power plant simulation models with molten salt as heat transfer fluid
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Wagner, Patrick H.DLR Institute of Solar ResearchUNSPECIFIED
Wittmann, Michaelmichael.wittmann (at) dlr.deUNSPECIFIED
Date:2014
Journal or Publication Title:Energy Procedia
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:49
DOI :[10.1016/j.egypro.2014.03.174]
Page Range:pp. 1652-1663
Publisher:Elsevier
ISSN:1876-6102
Status:Published
Keywords:Operation Strategy, Molten Salt, Solar Thermal Power Plant, Parabolic Trough, Transient
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Concentrating Solar Systems (old)
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Line-Focusing Systems (old)
Location: Stuttgart
Institutes and Institutions:Institute of Solar Research > Linienfokussierende Systeme
Deposited By: Wittmann, Michael
Deposited On:06 Nov 2014 14:08
Last Modified:06 Sep 2019 15:22

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