{"title":"Effects of the inclination angle of planar encapsulated PCM in freezing and melting kinetics","authors":"","doi":"10.1016/j.ijheatmasstransfer.2024.126272","DOIUrl":null,"url":null,"abstract":"<div><div>Experiments and simulations have been used to study the freezing and melting kinetics of a single capsule containing a phase change material (PCM) for thermal energy storage. A commercial encapsulated PCM (EPCM) has been selected, with a melting/freezing temperature of approximately −3 °C, and the effect of the inclination angle on the phase change kinetics has been studied. Experimentally, the freezing and melting times have been determined using a thermocouple located in the center of the capsule. The results show a non-monotonic trend in the freezing time with the inclination angle, with a maximum at 45°, both in the simulations and experiments. For the melting, a decreasing trend is observed in the simulations, which cannot be verified experimentally due to the measurement errors. Additionally, the simulations indicate that the misallocation of the internal probe within the nodule center can affect the results only marginally. Finally, the simulations show that the loose material within the capsule slows down the freezing, and increases the effect of the inclination angle.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":null,"pages":null},"PeriodicalIF":5.0000,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Heat and Mass Transfer","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0017931024011013","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Experiments and simulations have been used to study the freezing and melting kinetics of a single capsule containing a phase change material (PCM) for thermal energy storage. A commercial encapsulated PCM (EPCM) has been selected, with a melting/freezing temperature of approximately −3 °C, and the effect of the inclination angle on the phase change kinetics has been studied. Experimentally, the freezing and melting times have been determined using a thermocouple located in the center of the capsule. The results show a non-monotonic trend in the freezing time with the inclination angle, with a maximum at 45°, both in the simulations and experiments. For the melting, a decreasing trend is observed in the simulations, which cannot be verified experimentally due to the measurement errors. Additionally, the simulations indicate that the misallocation of the internal probe within the nodule center can affect the results only marginally. Finally, the simulations show that the loose material within the capsule slows down the freezing, and increases the effect of the inclination angle.
期刊介绍:
International Journal of Heat and Mass Transfer is the vehicle for the exchange of basic ideas in heat and mass transfer between research workers and engineers throughout the world. It focuses on both analytical and experimental research, with an emphasis on contributions which increase the basic understanding of transfer processes and their application to engineering problems.
Topics include:
-New methods of measuring and/or correlating transport-property data
-Energy engineering
-Environmental applications of heat and/or mass transfer