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Authors
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Zhao, J.; Karalis, G.; Liebscher, M.; Tzounis, L.; Köberle, T.; Fischer, D.; Simon, F.; Al Aiti, M.; Cuniberti, G.; Mechtcherine, V.
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Title
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Mineral-impregnated carbon-fiber based reinforcing grids as thermal energy harvesters: A proof-of-concept study towards multifunctional building materials
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Date
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01.11.2023
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Number
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0
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Abstract
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This proof-of-concept study demonstrates for the first time the fabrication of a multifunctional reinforcing grid-building material within a thermoelectric element generator (TEG) configuration. Commercially available carbon fiber yarns, which possess inherent Seebeck coefficient (S) values of −2.5 μV/K (n-type) and +7.4 μV/K (p-type), were thoroughly investigated prior to their impregnation with a geopolymer (GP)-based suspension. The resulting hardened mineral-impregnated carbon-fiber (MCF) reinforcements were subsequently tested regarding their physicochemical and mechanical properties. Afterward, individual MCFs were employed as n-/p-type thermoelements to assemble a grid-like TEG consisting of five serially interconnected junctions. The TEG-enabled reinforcing grid exhibited a voltage output of 1.8 mV, corresponding to a generated power of 22.3 nW upon exposure to an in-plane temperature difference (ΔT) of 50 K. Multifunctional building materials are envisaged to exploit thermal gradients on a large-scale during their service lifetime, contributing towards zero energy consumption constructions.
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Publisher
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Energy and Buildings
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Wikidata
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Citation
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Energy and Buildings 298 (2023) 113564
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DOI
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https://doi.org/10.1016/j.enbuild.2023.113564
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Tags
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