• search hit 12 of 9803
Back to Result List

Advanced two phase flow model for transient molten salt receiver system simulation

  • In order to realistically predict and optimize the actual performance of a concentrating solar power (CSP) plant sophisticated simulation models and methods are required. This paper presents a detailed dynamic simulation model for a Molten Salt Solar Tower (MST) system, which is capable of simulating transient operation including detailed startup and shutdown procedures including drainage and refill. For appropriate representation of the transient behavior of the receiver as well as replication of local bulk and surface temperatures a discretized receiver model based on a novel homogeneous two-phase (2P) flow modelling approach is implemented in Modelica Dymola®. This allows for reasonable representation of the very different hydraulic and thermal properties of molten salt versus air as well as the transition between both. This dynamic 2P receiver model is embedded in a comprehensive one-dimensional model of a commercial scale MST system and coupled with a transient receiver flux density distribution from raytracing based heliostat field simulation. This enables for detailed process prediction with reasonable computational effort, while providing data such as local salt film and wall temperatures, realistic control behavior as well as net performance of the overall system. Besides a model description, this paper presents some results of a validation as well as the simulation of a complete startup procedure. Finally, a study on numerical simulation performance and grid dependencies is presented and discussed.

Export metadata

Additional Services

Share in Twitter Search Google Scholar
Metadaten
Author:Christian Schwager, Robert Flesch, Peter Schwarzbözl, Ulf HerrmannORCiD, Cristiano José Teixeira BouraORCiD
DOI:https://doi.org/10.1016/j.solener.2021.12.065
ISSN:0038-092X (print)
ISSN:1471-1257 (online)
Parent Title (English):Solar Energy
Publisher:Elsevier
Place of publication:Amsterdam
Document Type:Article
Language:English
Year of Completion:2022
Date of the Publication (Server):2024/03/15
Tag:Dynamic simulation; Molten salt receiver system; Molten salt solar tower; Transient flux distribution; Two-phase modelling
Volume:232
First Page:362
Last Page:375
Link: https://doi.org/10.1016/j.solener.2021.12.065
Institutes:FH Aachen / Fachbereich Energietechnik
FH Aachen / Solar-Institut Jülich
FH Aachen / ECSM European Center for Sustainable Mobility
FH Aachen / Kommission für Forschung und Entwicklung
collections:Verlag / Elsevier