Latent heat accumulators: An equation for the mass change of phase

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60162694%3AG43__%2F26%3A00564204" target="_blank" >RIV/60162694:G43__/26:00564204 - isvavai.cz</a>

Alternative codes found

RIV/60076658:12310/25:43909858

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S1359431124029314" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1359431124029314</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.applthermaleng.2024.125263" target="_blank" >10.1016/j.applthermaleng.2024.125263</a>

Result language

angličtina

Original language name

Latent heat accumulators: An equation for the mass change of phase

Original language description

This study addresses the critical problem of modelling phase changes in latent heat accumulators, focusing on accurately quantifying the mass of phase-change material undergoing transition during charging and discharging processes. Understanding this behaviour is crucial for optimizing latent heat accumulators, which are increasingly used in thermal energy storage systems for applications such as solar installations. A new analytical framework is developed, introducing an equation that explicitly links the mass change of phase-change material to operational and material parameters, extending prior models limited by assumptions of stationary heat flows. The approach integrates thermal resistance dynamics, specific heat transfer properties, and geometric configurations of spherical phase-change material capsules. Validation is achieved by comparing the model's predictions against experimental data, demonstrating its robustness across varying conditions. The novel incorporation of time-dependent thermal resistance reflects the evolving physical state of phase-change material, offering improved precision over previous stationary models. This work advances the state of the art by deriving a generalized, yet practical, solution for calculating phase-change material mass changes. It enables comprehensive characterization of latent heat accumulator performance, encompassing temperature distribution, phase transition kinetics, and energy transfer efficiency. These findings provide a foundation for the enhanced design and operation of latent heat accumulators in renewable energy and thermal management systems.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20303 - Thermodynamics

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

APPLIED THERMAL ENGINEERING

ISSN

1359-4311

e-ISSN

1873-5606

Volume of the periodical

262

Issue of the periodical within the volume

March 2025

Country of publishing house

GB - UNITED KINGDOM

Number of pages

7

Pages from-to

125263

UT code for WoS article

001392693900001

EID of the result in the Scopus database

2-s2.0-85212571632