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Faculté des Sciences appliquées
Faculté des Sciences appliquées
MASTER THESIS
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Development and validation of a numerical latent heat thermal energy storage model with application in a CSP-biomass system

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Kohnen, Oliver ULiège
Promotor(s) : Dewallef, Pierre ULiège
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 ULiège
Date of defense  : 8-Sep-2016/9-Sep-2016
Advisor(s) : Dewallef, Pierre ULiège
Committee's member(s) : Lemort, Vincent ULiège
Quoilin, Sylvain ULiège
Léonard, Grégoire ULiège
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.


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Document(s)

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Access Master_thesis_Oliver_Kohnen.pdf
Description: Master thesis Oliver Kohnen
Size: 4.16 MB
Format: Adobe PDF

Annexe(s)

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Access PCM_storage_discretized.mo
Description: Discretized white-box PCM storage Modelica model
Size: 296 kB
Format: Unknown
File
Access PCM_storage_single_node.mo
Description: Single-node grey-box PCM storage Modelica model
Size: 528.49 kB
Format: Unknown
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Access Bricker_model.mo
Description: Bricker Modelica model with PCM storage
Size: 114.9 kB
Format: Unknown

Author

  • Kohnen, Oliver ULiège Université de Liège > Master ing. civil électro., fin. appr. (ex 2e master)

Promotor(s)

Committee's member(s)

  • Lemort, Vincent ULiège Université de Liège - ULg > Département d'aérospatiale et mécanique > Systèmes énergétiques
    ORBi View his publications on ORBi
  • Quoilin, Sylvain ULiège Université de Liège - ULg > Département d'aérospatiale et mécanique > Systèmes énergétiques
    ORBi View his publications on ORBi
  • Léonard, Grégoire ULiège Université de Liège - ULg > Department of Chemical Engineering > Intensif.des procéd. de l'indust.chim.basée sur l'anal.syst.
    ORBi View his publications on ORBi
  • Hengstberger, Florian Austrian Institute of Technology, Donau-City-Strasse, 1, A-1120 Vienna, Austria
  • Total number of views 57
  • Total number of downloads 1409










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