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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, Safety and Transport, Fire and Safety.ORCID iD: 0000-0001-7163-1692
RISE Research Institutes of Sweden, Built Environment, Infrastructure and concrete technology.ORCID iD: 0000-0002-4182-5653
Waters Sverige AB, Sweden.
RISE Research Institutes of Sweden, Safety and Transport, Fire and Safety.ORCID iD: 0000-0002-6430-6602
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2023 (English)In: Construction and Building Materials, E-ISSN 1879-0526, Vol. 401, p. 132915-132915Article in journal (Refereed) 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.

Place, publisher, year, edition, pages
2023. Vol. 401, p. 132915-132915
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:ri:diva-66941DOI: 10.1016/j.conbuildmat.2023.132915OAI: oai:DiVA.org:ri-66941DiVA, id: diva2:1799142
Note

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.

Available from: 2023-09-21 Created: 2023-09-21 Last updated: 2023-09-21Bibliographically approved

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Pushp, MohitArun Chaudhari, OjasBlomqvist, PerLönnermark, Anders

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