Heat transfer enhancement in cylindrical heat pipes with MgO-Al2O3 hybrid nanofluids in water-ethylene glycol mixture: An RSM approach

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering Pub Date : 2024-10-21 DOI:10.1016/j.csite.2024.105278

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Abstract

Heat pipes are passive devices crucial for thermal management in various applications. However, conventional water-based fluids can limit their heat transfer capacity, especially in cold environments where freeze protection is necessary. This study investigates the potential of MgO-Al₂O₃ hybrid nanofluids to enhance heat transfer performance in cylindrical mesh heat pipes while addressing these limitations. The research demonstrates significant improvements in thermal performance compared to a water-ethylene glycol mixture. The MgO-Al₂O₃ hybrid nanofluid reduces thermal resistance by enhancing surface wettability in the evaporator section. Additionally, the formation of a nanofluid coating on the evaporator surface leads to a higher heat transfer coefficient. Furthermore, RSM successfully models the relationship between nanoparticle concentration, power input, and key thermal responses (thermal resistance and heat transfer coefficient). These findings highlight the effectiveness of MgO-Al₂O₃ hybrid nanofluids for augmenting heat transfer in heat pipes and provide valuable RSM models for predicting thermal behavior within the investigated range.

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在水-乙二醇混合物中使用 MgO-Al2O3 混合纳米流体增强圆柱形热管中的传热：RSM 方法

热管是一种无源装置，在各种应用中对热管理至关重要。然而，传统的水基流体会限制其传热能力，尤其是在需要防冻的寒冷环境中。本研究探讨了氧化镁-Al2O3 混合纳米流体在提高圆柱形网状热管传热性能方面的潜力，同时解决了这些局限性。研究结果表明，与水-乙二醇混合物相比，热性能有了明显改善。氧化镁-Al2O3 混合纳米流体通过增强蒸发器部分的表面润湿性来降低热阻。此外，在蒸发器表面形成纳米流体涂层可提高传热系数。此外，RSM 成功地模拟了纳米粒子浓度、输入功率和关键热反应（热阻和传热系数）之间的关系。这些发现凸显了氧化镁-Al2O3 混合纳米流体在增强热管传热方面的有效性，并为预测研究范围内的热行为提供了有价值的 RSM 模型。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.