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Article

Optimization of Design Variables of a Phase Change Material Storage Tank and Comparison of a 2D Implicit vs. 2D Explicit Model

GREiA Research Group, University of Lleida, Pere de Cabrera s/n, 25001 Lleida, Spain
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Academic Editor: Laura Fedele
Energies 2021, 14(9), 2605; https://doi.org/10.3390/en14092605
Received: 25 March 2021 / Revised: 21 April 2021 / Accepted: 28 April 2021 / Published: 2 May 2021
In this study, a thermal energy storage tank filled with commercial phase change material flat slabs is investigated. The tank provides heat at around 15 °C to the evaporator of a seasonal thermal energy storage system developed under the EU-funded project SWS-Heating. A 2D numerical model of the phase changed material storage tank based on the finite control volume approach was developed and validated with experimental data. Based on the validated model, an optimization was performed to identify the number, type and configuration of slabs. The final goal of the phase change material tank model is to be implemented into the whole generic heating system model. A trade-off between results’ accuracy and computational time of the phase change material model is needed. Therefore, a comparison between a 2D implicit and 2D explicit scheme of the model was performed. The results showed that using an explicit scheme instead of an implicit scheme with a reasonable number of nodes (15 to 25) in the heat transfer fluid direction allowed a considerable decrease in the computational time (7 times for the best case) with only a slight reduction in the accuracy in terms on mean average percentage error (0.44%). View Full-Text
Keywords: phase change material; numerical model; design variables optimization; latent heat thermal energy storage; 2D implicit vs. 2D explicit model comparison phase change material; numerical model; design variables optimization; latent heat thermal energy storage; 2D implicit vs. 2D explicit model comparison
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MDPI and ACS Style

Crespo, A.; Zsembinszki, G.; Vérez, D.; Borri, E.; Fernández, C.; Cabeza, L.F.; de Gracia, A. Optimization of Design Variables of a Phase Change Material Storage Tank and Comparison of a 2D Implicit vs. 2D Explicit Model. Energies 2021, 14, 2605. https://doi.org/10.3390/en14092605

AMA Style

Crespo A, Zsembinszki G, Vérez D, Borri E, Fernández C, Cabeza LF, de Gracia A. Optimization of Design Variables of a Phase Change Material Storage Tank and Comparison of a 2D Implicit vs. 2D Explicit Model. Energies. 2021; 14(9):2605. https://doi.org/10.3390/en14092605

Chicago/Turabian Style

Crespo, Alicia, Gabriel Zsembinszki, David Vérez, Emiliano Borri, Cèsar Fernández, Luisa F. Cabeza, and Alvaro de Gracia. 2021. "Optimization of Design Variables of a Phase Change Material Storage Tank and Comparison of a 2D Implicit vs. 2D Explicit Model" Energies 14, no. 9: 2605. https://doi.org/10.3390/en14092605

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