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Modelling and optimization of transient processes in line focusing power plants with single-phase heat transfer medium

Noureldin, Kareem und González-Escalda, Leopoldo M. und Hirsch, Tobias und Nouri, Bijan und Pitz-Paal, Robert (2016) Modelling and optimization of transient processes in line focusing power plants with single-phase heat transfer medium. In: AIP Conference Proceedings (1734). AIP. SolarPACES 2015, 2015-10-13 - 2015-10-16, Kapstadt, Südafrika. doi: 10.1063/1.4949169.

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Offizielle URL: http://dx.doi.org/10.1063/1.4949169

Kurzfassung

A large number of commercial and research line focusing solar power plants are in operation and under development. Such plants include parabolic trough collectors (PTC) or linear Fresnel using thermal oil or molten salt as the heat transfer medium (HTM). However, the continuously varying and dynamic solar condition represent a big challenge for the plant control in order to optimize its power production and to keep the operation safe. A better understanding of the behaviour of such power plants under transient conditions will help reduce defocusing instances, improve field control, and hence, increase the energy yield and confidence in this new technology. Computational methods are very powerful and cost-e�ective tools to gain such understanding. However, most simulation models described in literature assume equal mass flow distributions among the parallel loops in the field or totally decouple the flow and thermal conditions. In this paper, a new numerical model to simulate a whole solar field with single-phase HTM is described. The proposed model consists of a hydraulic part and a thermal part that are coupled to account for the e�ect of the thermal condition of the field on the flow distribution among the parallel loops. The model is specifically designed for large line-focusing solar fields o�ering a high degree of flexibility in terms of layout, condition of the mirrors, and spatially resolved DNI data. Moreover, the model results have been compared to other simulation tools, as well as experimental and plant data, and the results show very good agreement. The model can provide more precise data to the control algorithms to improve the plant control. In addition, short-term and accurate spatially discretized DNI forecasts can be used as input to predict the field behaviour in-advance. In this paper, the hydraulic and thermal parts, as well as the coupling procedure, are described and some validation results and results of simulating an example field are shown.

elib-URL des Eintrags:https://elib.dlr.de/108671/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Modelling and optimization of transient processes in line focusing power plants with single-phase heat transfer medium
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Noureldin, Kareemkareem.noureldin (at) dlr.dehttps://orcid.org/0000-0003-3833-2425NICHT SPEZIFIZIERT
González-Escalda, Leopoldo M.Marquesado SolarNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Hirsch, Tobiastobias.hirsch (at) dlr.dehttps://orcid.org/0000-0003-0063-0128NICHT SPEZIFIZIERT
Nouri, Bijanbijan.nouri (at) dlr.dehttps://orcid.org/0000-0002-9891-1974NICHT SPEZIFIZIERT
Pitz-Paal, Robertrobert.pitz-paal (at) dlr.dehttps://orcid.org/0000-0002-3542-3391NICHT SPEZIFIZIERT
Datum:2016
Erschienen in:AIP Conference Proceedings
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Ja
DOI:10.1063/1.4949169
Verlag:AIP
Status:veröffentlicht
Stichwörter:CSP, parabolic trough, Simulation tool, transient
Veranstaltungstitel:SolarPACES 2015
Veranstaltungsort:Kapstadt, Südafrika
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:13 Oktober 2015
Veranstaltungsende:16 Oktober 2015
Veranstalter :SolarPACES
HGF - Forschungsbereich:Energie
HGF - Programm:Erneuerbare Energie
HGF - Programmthema:Konzentrierende solarthermische Technologien
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E SF - Solarforschung
DLR - Teilgebiet (Projekt, Vorhaben):E - Neue Wärmeträgerfluide (alt)
Standort: Stuttgart
Institute & Einrichtungen:Institut für Solarforschung > Linienfokussierende Systeme
Hinterlegt von: Noureldin, Kareem
Hinterlegt am:01 Dez 2016 19:43
Letzte Änderung:24 Apr 2024 20:13

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