Study of effects of constructed fins on melting of PCM in helical coil heat exchanger

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering Pub Date : 2025-02-18 DOI:10.1016/j.csite.2025.105896

S.A. Marzouk , Fahad Awjah Almehmadi , Ahmad Aljabr , Maisa A. Sharaf , Tabish Alam , Dan Dobrotă

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Abstract

The PCM melting process using a helical coil heat exchanger with a plain tube, longitudinal fins, and constructed fins is investigated. Water serves as the heat transfer fluid and paraffin wax as the PCM. A numerical simulation by Ansys Fluent software is conducted to study the liquid fraction and temperature of the PCM with time and the effectiveness of the melting process. The numerical results illustrate a 52 % and 65 % liquid fraction increase with longitudinal fins and constructed fins, respectively. The melting time can be shortened for longitudinal fins by 29 % and for constructed fins by 50 %. The effectiveness of the PCM melting process decreases over time due to the reduction in water outlet temperature. Constructed fins improve melting efficiency by increasing surface area and heat transfer. Radial melting starts at the tube wall, driven by conduction and convection. Fins on the tube surface enhance heat transfer, shorten melting time, and increase liquid fraction, improving the overall performance of the PCM melting process.

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来源期刊

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.