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Optimization of Multilayered Walls for Building Envelopes Including PCM-Based Composites

Fachinotti, Victor D. ; Bre, Facundo ; Mankel, Christoph ; Koenders, Eduardus A. B. ; Caggiano, Antonio (2024)
Optimization of Multilayered Walls for Building Envelopes Including PCM-Based Composites.
In: Materials, 2020, 13 (12)
doi: 10.26083/tuprints-00016978
Article, Secondary publication, Publisher's Version

Copyright Information: CC BY 4.0 International - Creative Commons, Attribution.

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Item Type: Article
Type of entry: Secondary publication
Title: Optimization of Multilayered Walls for Building Envelopes Including PCM-Based Composites
Language: English
Date: 15 January 2024
Place of Publication: Darmstadt
Year of primary publication: 2020
Place of primary publication: Basel
Publisher: MDPI
Journal or Publication Title: Materials
Volume of the journal: 13
Issue Number: 12
Collation: 13 Seiten
DOI: 10.26083/tuprints-00016978
Corresponding Links:
Origin: Secondary publication DeepGreen

This work proposes a numerical procedure to simulate and optimize the thermal response of a multilayered wallboard system for building envelopes, where each layer can be possibly made of Phase Change Materials (PCM)-based composites to take advantage of their Thermal-Energy Storage (TES) capacity. The simulation step consists in solving the transient heat conduction equation across the whole wallboard using the enthalpy-based finite element method. The weather is described in detail by the Typical Meteorological Year (TMY) of the building location. Taking the TMY as well as the wall azimuth as inputs, EnergyPlusTM is used to define the convective boundary conditions at the external surface of the wall. For each layer, the material is chosen from a predefined vade mecum, including several PCM-based composites developed at the Institut für Werkstoffe im Bauwesen of TU Darmstadt together with standard insulating materials (i.e., EPS or Rockwool). Finally, the optimization step consists in using genetic algorithms to determine the stacking sequence of materials across the wallboard to minimize the undesired heat loads. The current simulation-based optimization procedure is applied to the design of envelopes for minimal undesired heat losses and gains in two locations with considerably different weather conditions, viz. Sauce Viejo in Argentina and Frankfurt in Germany. In general, for each location and all the considered orientations (north, east, south and west), optimal results consist of EPS walls containing a thin layer made of the PCM-based composite with highest TES capacity, placed near the middle of the wall and closer to the internal surface.

Uncontrolled Keywords: thermal-energy storage (TES), phase change materials (PCMs), multilayered walls, building envelopes, non-linear optimization, genetic algorithms
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-169787
Additional Information:

This article belongs to the Special Issue Energy in Construction and Building Materials

Classification DDC: 600 Technology, medicine, applied sciences > 624 Civil engineering and environmental protection engineering
Divisions: 13 Department of Civil and Environmental Engineering Sciences > Institute of Construction and Building Materials
Date Deposited: 15 Jan 2024 14:10
Last Modified: 18 Mar 2024 10:15
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/16978
PPN: 516346962
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