MWCNT和石墨烯纳米颗粒中Fe2O3杂化对H-theta v形波纹板换热器性能的影响

IF 3.9 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Vacuum Pub Date : 2025-08-28 DOI:10.1016/j.vacuum.2025.114700

Abdul Razack Mohammad , Dora Nagaraju , Vuppula Santhosh Reddy , T. Raju

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引用次数: 0

摘要

采用不同浓度和雷诺数的Fe2O3/石墨烯和Fe2O3/MWCNT制备了两种混合纳米流体，对高θ v形波纹板换热器进行了测试。由于有效的官能化和合成，杂化产生了稳定的纳米流体，其导热性增强。结果表明，当Fe2O3/石墨烯的质量流率为8 L/min， Fe2O3/MWCNT的纳米流体质量流率为0.03%时，与水相比，性能分别提高了35%和17%。观察到，F2O3/石墨烯杂化材料的Nusselt数和总换热系数均有所提高，提高了PHE效率。更高浓度的纳米颗粒改善了传热性能，但增加了压降和泵送功率。fm - 0.03%和fg - 0.03%纳米流体都能显著降低熵产，其中fg - 0.03%效果最好。然而，在高雷诺数下，由于粘度和团聚问题，性能下降。该研究强调了彻底测试和长期稳定性评估的必要性，以优化实际使用的纳米流体，建议结合金属氧化物。

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Influence of Fe2O3 hybridization in MWCNT and graphene nanoparticles separately on the performance of H-theta Chevron corrugated Plate heat exchanger

High-theta chevron corrugated plate heat exchanger is tested with two hybrid nanofluids prepared using Fe₂O₃/graphene and Fe₂O₃/MWCNT at various concentrations and Reynolds numbers. The hybridization resulted in stable nanofluids with enhanced thermal conductivity due to effective functionalization and synthesis. The results indicated that at an 8 L/min mass flow rate of Fe₂O₃/graphene, and Fe₂O₃/MWCNT of 0.03 % nanofluid, enhancement by 35 % and 17 % achieved compared to water. It is observed that the F₂O₃/graphene hybrid showed improved Nusselt numbers and overall heat transfer coefficient, enhancing PHE efficiency. Higher concentrations of nanoparticles improved heat transfer performance, but increased pressure drops and pumping power. Both FM-0.03 % and FG-0.03 % nanofluids significantly reduced entropy production, with FG-0.03 % being the most effective. However, performance decreased at higher Reynolds numbers due to viscosity and agglomeration issues. The study emphasizes the necessity for thorough testing and long-term stability assessments to optimize nanofluids for practical use, suggesting that combining metal oxides.

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.