Modeling of heat capacity peaks and enthalpy jumps of phase-change materials used for thermal energy storage

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F17%3A00304308" target="_blank" >RIV/68407700:21110/17:00304308 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.ijheatmasstransfer.2016.11.024" target="_blank" >http://dx.doi.org/10.1016/j.ijheatmasstransfer.2016.11.024</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.ijheatmasstransfer.2016.11.024" target="_blank" >10.1016/j.ijheatmasstransfer.2016.11.024</a>

Result language
angličtina
Original language name
Modeling of heat capacity peaks and enthalpy jumps of phase-change materials used for thermal energy storage
Original language description
We consider three phase-change materials (PCMs) in which a change between two phases may be used to store/release thermal energy. Their enthalpy and heat capacity were measured in a quasistatic regime by adiabatic scanning calorimetry and show, within a certain temperature range, a single distinct jump and peak, respectively. We present a microscopic development from which the jumps and peaks can be accurately fitted and that could be analogously applied even to other PCMs. In addition, we determine the baseline and excess part of the heat capacity and thus the latent heat associated with the phase change. The development is based on the observation that PCMs often have polycrystalline structure, being composed of many single-crystalline grains. The enthalpy and heat capacity measured in experiments are therefore interpreted as superpositions of many contributions that come from the individual grains.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20303 - Thermodynamics

Project
<a href="/en/project/GBP105%2F12%2FG059" target="_blank" >GBP105/12/G059: Cumulative time dependent processes in building materials and structures</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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