2026-07-18T12:19:13Zhttps://riubu.ubu.es/oai/request

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

García Fuente, Manuel González Peña, David Alonso Tristán, Cristina 2023-01-19T10:22:30Z 2023-01-19T10:22:30Z 2022-04 http://hdl.handle.net/10259/7272 10.3390/app12073640 2076-3417 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). application/pdf eng MDPI 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 PCM Convective flows CFD Numerical simulation Experimental Electrotecnia Electrical engineering A Numerical Simulation of an Experimental Melting Process of a Phase-Change Material without Convective Flows info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Applied Sciences 12 7