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Modelling and Optimization of Transient Processes in Line Focusing Power Plants with Single-Phase HTF

Noureldin, Kareem and González-Escalda, Leopoldo M. and Hirsch, Tobias and Nouri, Bijan and Pitz-Paal, Robert (2015) Modelling and Optimization of Transient Processes in Line Focusing Power Plants with Single-Phase HTF. In: Proceedings SolarPACES 2015 Conference, 1734. SolarPACES 2015, 13-16 Oct 2015, Cape Town, South Africa. doi: 10.1063/1.4949169. ISBN 978-0-7354-1386-3.

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Official URL: http://dx.doi.org/10.1063/1.4949169 


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-effective 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 effect 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 offering 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.

Item URL in elib:https://elib.dlr.de/98919/
Document Type:Conference or Workshop Item (Speech)
Title:Modelling and Optimization of Transient Processes in Line Focusing Power Plants with Single-Phase HTF
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
González-Escalda, Leopoldo M.Marquesado SolarUNSPECIFIEDUNSPECIFIED
Hirsch, TobiasUNSPECIFIEDhttps://orcid.org/0000-0003-0063-0128UNSPECIFIED
Pitz-Paal, RobertUNSPECIFIEDhttps://orcid.org/0000-0002-3542-3391UNSPECIFIED
Date:14 October 2015
Journal or Publication Title:Proceedings SolarPACES 2015 Conference
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Series Name:AIP Conference Proceedings
Keywords:Line focusing systems, concentrated solar power, simulation, solar field, molten salt
Event Title:SolarPACES 2015
Event Location:Cape Town, South Africa
Event Type:international Conference
Event Dates:13-16 Oct 2015
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 - Qualification (old), E - Line-Focusing Systems (old)
Location: Stuttgart , other
Institutes and Institutions:Institute of Solar Research > Linienfokussierende Systeme
Institute of Solar Research > Qualifizierung
Deposited By: Noureldin, Kareem
Deposited On:30 Oct 2015 15:46
Last Modified:10 Jul 2023 11:04

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