{"title":"利用新型爪形鳍片提高三管相变储能装置的能量存储/释放性能","authors":"","doi":"10.1016/j.ijheatmasstransfer.2024.126368","DOIUrl":null,"url":null,"abstract":"<div><div>A novel claw-shaped fin has been developed to address the heat-transfer differences between the melting and solidification processes to enhance the efficiency of the melting/solidification cycles. The enthalpy-porous medium model simulated the phase change material's (PCM) melting and solidification process. The impact of branch number, length ratio (<em>L</em>), branch angle (<em>α</em>), and fin material on the PCM phase change process was analyzed utilizing liquid fraction/temperature contours, liquid fraction curves, and Nusselt numbers. Results indicate that the improvement in melting performance due to adding branches is primarily attributed to enhanced heat conduction and coordinates the radial solidification rate by improving the radial temperature response. For a fixed fin volume, increasing <em>L</em> and decreasing <em>α</em> are beneficial for reducing the PCM's melting and solidification times. Materials with lower thermal conductivity can weaken the ability of heat to transfer quickly from the fin base to the branches, thereby reducing the effectiveness of direct heat transfer to the PCM. Based on RSM, the <em>L</em> significantly impacts melting/solidification performance more than the <em>α</em>; the optimized four-branch fins (<em>L</em> = 1.7, <em>α</em> = 21.6°) reduce the melting/solidification time by 47.8 % compared to V-shaped fins. Further increasing branches does not significantly enhance heat-transfer performance.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":null,"pages":null},"PeriodicalIF":5.0000,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Enhancing the energy storage/release performance of a triple-tube phase change storage unit with novel claw-shaped fins\",\"authors\":\"\",\"doi\":\"10.1016/j.ijheatmasstransfer.2024.126368\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>A novel claw-shaped fin has been developed to address the heat-transfer differences between the melting and solidification processes to enhance the efficiency of the melting/solidification cycles. The enthalpy-porous medium model simulated the phase change material's (PCM) melting and solidification process. The impact of branch number, length ratio (<em>L</em>), branch angle (<em>α</em>), and fin material on the PCM phase change process was analyzed utilizing liquid fraction/temperature contours, liquid fraction curves, and Nusselt numbers. Results indicate that the improvement in melting performance due to adding branches is primarily attributed to enhanced heat conduction and coordinates the radial solidification rate by improving the radial temperature response. For a fixed fin volume, increasing <em>L</em> and decreasing <em>α</em> are beneficial for reducing the PCM's melting and solidification times. Materials with lower thermal conductivity can weaken the ability of heat to transfer quickly from the fin base to the branches, thereby reducing the effectiveness of direct heat transfer to the PCM. Based on RSM, the <em>L</em> significantly impacts melting/solidification performance more than the <em>α</em>; the optimized four-branch fins (<em>L</em> = 1.7, <em>α</em> = 21.6°) reduce the melting/solidification time by 47.8 % compared to V-shaped fins. Further increasing branches does not significantly enhance heat-transfer performance.</div></div>\",\"PeriodicalId\":336,\"journal\":{\"name\":\"International Journal of Heat and Mass Transfer\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.0000,\"publicationDate\":\"2024-11-01\",\"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/S0017931024011979\",\"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}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Heat and Mass Transfer","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0017931024011979","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}
Enhancing the energy storage/release performance of a triple-tube phase change storage unit with novel claw-shaped fins
A novel claw-shaped fin has been developed to address the heat-transfer differences between the melting and solidification processes to enhance the efficiency of the melting/solidification cycles. The enthalpy-porous medium model simulated the phase change material's (PCM) melting and solidification process. The impact of branch number, length ratio (L), branch angle (α), and fin material on the PCM phase change process was analyzed utilizing liquid fraction/temperature contours, liquid fraction curves, and Nusselt numbers. Results indicate that the improvement in melting performance due to adding branches is primarily attributed to enhanced heat conduction and coordinates the radial solidification rate by improving the radial temperature response. For a fixed fin volume, increasing L and decreasing α are beneficial for reducing the PCM's melting and solidification times. Materials with lower thermal conductivity can weaken the ability of heat to transfer quickly from the fin base to the branches, thereby reducing the effectiveness of direct heat transfer to the PCM. Based on RSM, the L significantly impacts melting/solidification performance more than the α; the optimized four-branch fins (L = 1.7, α = 21.6°) reduce the melting/solidification time by 47.8 % compared to V-shaped fins. Further increasing branches does not significantly enhance heat-transfer performance.
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