Development and validation of a numerical latent heat thermal energy storage model with application in a CSP-biomass system
Kohnen, Oliver
Promotor(s) : Dewallef, Pierre
Date of defense : 8-Sep-2016/9-Sep-2016 • Permalink : http://hdl.handle.net/2268.2/1675
Details
Title : | Development and validation of a numerical latent heat thermal energy storage model with application in a CSP-biomass system |
Translated title : | [fr] Développement et validation d'un model numerique d'un stockage thermique latent avec application dans un système CSP-biomass |
Author : | Kohnen, Oliver |
Date of defense : | 8-Sep-2016/9-Sep-2016 |
Advisor(s) : | Dewallef, Pierre |
Committee's member(s) : | Lemort, Vincent
Quoilin, Sylvain Léonard, Grégoire Hengstberger, Florian |
Language : | English |
Number of pages : | 127 |
Keywords : | [en] Latent heat storage [en] phase change material [en] numerical model [en] Bricker [en] CSP-biomass [en] PCM-storage [en] Modelica [en] ThermoCyle |
Discipline(s) : | Engineering, computing & technology > Energy |
Research unit : | Austrian Institute of Technology (AIT) |
Target public : | Researchers Professionals of domain Student General public |
Institution(s) : | Université de Liège, Liège, Belgique Austrian Institute of Technology, Vienna, Austria |
Degree: | Master en ingénieur civil électromécanicien, à finalité approfondie |
Faculty: | Master thesis of the Faculté des Sciences appliquées |
Abstract
[en] This master thesis relates to the development of a latent heat thermal energy storage (LHTES) model and the validation against experimental measurement data. Two 2D numeric models based on the ThermoCycle Modelica library using diff erent model approaches have been established: A white-box discretized and a grey-box single-node model have been developed. The models account for the temperature dependence of all material properties of phase change material (PCM), storage and heat transfer fluid (HTF). Validation of both models based on experimental data from a LHTES labscaled prototype with partial and full charging and discharging has been performed. The statistical analysis proved the validity and usefulness of the model parameter sets. Di fferences between both models in terms of estimated parameters, relative errors and simulation times are presented and analysed. After the optimized model parameters have been found, the validated discretized white-box PCM storage model is integrated in a practical application to improve the overall system e ciency. The application scenario consists in a concentrated solar power (CSP) biomass combined heat and power (CHP) system based on organic Rankine cycle (ORC) technology developed in the framework of the EU founded BRICKER project. The PCM storage is introduced to the solar field in order to maximize the solar generated energy and hence reduce the biomass consummation. A comparison with a thermocline storage concludes this work.
File(s)
Document(s)
Description: Master thesis Oliver Kohnen
Size: 4.16 MB
Format: Adobe PDF
Annexe(s)
Description: Discretized white-box PCM storage Modelica model
Size: 296 kB
Format: Unknown
Description: Single-node grey-box PCM storage Modelica model
Size: 528.49 kB
Format: Unknown
Description: Bricker Modelica model with PCM storage
Size: 114.9 kB
Format: Unknown
Cite this master thesis
The University of Liège does not guarantee the scientific quality of these students' works or the accuracy of all the information they contain.