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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/60076658:12310/25:43909858

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20303 - Thermodynamics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

APPLIED THERMAL ENGINEERING

ISSN

1359-4311

e-ISSN

1873-5606

Svazek periodika

262

Číslo periodika v rámci svazku

March 2025

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

125263

Kód UT WoS článku

001392693900001

EID výsledku v databázi Scopus

2-s2.0-85212571632