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Specific heat and excess heat capacity of grout with phase change materials using heat conduction microcalorimetry
RISE Research Institutes of Sweden, Säkerhet och transport, Brand och Säkerhet.ORCID-id: 0000-0001-7163-1692
RISE Research Institutes of Sweden, Samhällsbyggnad, Infrastruktur och betongbyggande.ORCID-id: 0000-0002-4182-5653
Waters Sverige AB, Sweden.
RISE Research Institutes of Sweden, Säkerhet och transport, Brand och Säkerhet.ORCID-id: 0000-0002-6430-6602
Vise andre og tillknytning
2023 (engelsk)Inngår i: Construction and Building Materials, E-ISSN 1879-0526, Vol. 401, s. 132915-132915Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Microencapsulated phase-change-materials (PCMs) incorporated in cementitious grout can be used as a source of energy in an underground thermal energy storage system. Differential scanning calorimetry (DSC) is a widely used technique to measure the latent heat or specific heat of PCM-embedded cementitious materials. However, using milligram sample sizes (as required by DSC) of a cementitious material fails to represent the actual scale of cementitious components. This is the reason why, in the present paper, non-isothermal heat conduction microcalorimetry (MC) was evaluated as a tool for determining the thermal properties of PCM-embedded grout as well as pure PCM (three PCMs were used). An MC experimental protocol (using both single and 5–6 temperature cycles) was developed and used to measure latent heat and melting and crystallization temperatures, which were in good agreement with those reported for pure PCMs by the producers. In addition, the specific heats of the PCM-containing grout also agreed with measurements using the hot disk technique. Overall, the results show that the MC technique can be used as a potential standard method in determining thermal processes in complex systems, such as in PCM-embedded cementitious systems, where a large sample size is needed to represent the material.

sted, utgiver, år, opplag, sider
2023. Vol. 401, s. 132915-132915
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URN: urn:nbn:se:ri:diva-66941DOI: 10.1016/j.conbuildmat.2023.132915OAI: oai:DiVA.org:ri-66941DiVA, id: diva2:1799142
Merknad

This article is part of a project that has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No 727583.

Tilgjengelig fra: 2023-09-21 Laget: 2023-09-21 Sist oppdatert: 2023-09-21bibliografisk kontrollert

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Pushp, MohitArun Chaudhari, OjasBlomqvist, PerLönnermark, Anders

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