2026-05-07T23:29:44Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/72722024-05-14T10:59:02Zcom_10259_4393com_10259_5086com_10259_2604col_10259_4394

A Numerical Simulation of an Experimental Melting Process of a Phase-Change Material without Convective Flows García Fuente, Manuel González Peña, David Alonso Tristán, Cristina PCM Convective flows CFD Numerical simulation Experimental Electrotecnia Electrical engineering The melting process of lauric acid in a square container heated from the top surface was numerically studied from an experimental case. Knowledge of this process is of special interest for computationally efficient modeling systems, such as PCM-enhanced photovoltaic panels in horizontal positions or energy storage using PCM embedded on flat surfaces. In these systems, the geometric arrangement of the PCM hinders the fluid-phase movements through natural convection, which slows the melting process and can cause overheating in the fluid phase. Using Ansys Fluent Software, three different approaches and two simulation methods, enthalpy-porosity and effective heat capacity, were developed for the numerical study. The results were compared with experimental measurements in a successful evaluation of the accuracy of computational fluid dynamics simulations. It could be observed that the effective heat capacity method presented significant advantages over the enthalpy-porosity method, since similar accuracy results were obtained, and a lower computational cost was required. The authors gratefully acknowledge the financial support provided by the Regional Government of Castilla y León under the “Support Program for Recognized Research Groups of Public Universities of Castilla y León” (BU021G19) and the Spanish Ministry of Science & Innovation under the R+D+i state program “Challenges Research Projects” (Ref. RTI2018-098900-B-I00). 2023-01-19T10:22:30Z 2023-01-19T10:22:30Z 2022-04 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/10259/7272 10.3390/app12073640 2076-3417 eng Applied sciences. 2022, V. 12, n. 7, 3640 https://doi.org/10.3390/app12073640 info:eu-repo/grantAgreement/Junta de Castilla y León//BU021G19//Metodología para la rehabilitación energética de edificios de uso público en castilla y león mediante integración fotovoltaica/ info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-098900-B-I00/ES/ANALISIS ESPECTRAL DE LA RADIACION SOLAR: APLICACIONES CLIMATICAS, ENERGETICAS Y BIOLOGICAS/ Atribución 4.0 Internacional http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess application/pdf MDPI