Heat Transfer Performance Study of Magnetic Fe2O3/Graphene Nanofluid in DASC

IF 2.5 4区工程技术 Q3 CHEMISTRY, PHYSICAL

International Journal of Thermophysics Pub Date : 2025-03-20 DOI:10.1007/s10765-025-03542-4

Mengmeng Ma, Shan Qing, Xiaohui Zhang, Mingci Hu, Zhihui Jia

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引用次数: 0

Abstract

Magnetic nanofluids have come to attention due to their special physical properties, but their poor thermophysical properties limit their generalized use in DASC. In this study, Fe₂O₃/graphene nanoparticles were obtained by attaching magnetic Fe₂O₃ to graphene sheets with excellent thermophysical properties, which enhanced the thermophysical properties of magnetic nanofluids. The study first analyzed the effects of different reaction conditions on the structural composition of the nanoparticles as well as the thermophysical properties of the nanofluids, and then applied the Fe₂O₃/graphene nanofluids in a DASC simulator to analyze the photothermal conversion performance of the nanofluids. The results show that the saturation magnetization strength of the G3 sample reaches 47.47 emu·g⁻¹, and the thermal conductivity of the nanofluid after its preparation into a nanofluid reaches 0.642 W·m⁻¹·K at 80 °C, whereas the thermal conductivity of the base fluid is only 0.41 W·m⁻¹·K. For the photothermal conversion performance, with the increase of the proportion of Fe₂O₃, the photothermal conversion efficiency shows a trend of increasing and then decreasing, and the highest value of its photothermal conversion efficiency appears in the G2 sample at 200 ppm, reaching 58.21 %, which is 31.9 % higher than that of the base fluid.

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来源期刊

International Journal of Thermophysics 物理-力学

CiteScore

4.10

自引率

9.10%

发文量

179

审稿时长

5 months

期刊介绍： International Journal of Thermophysics serves as an international medium for the publication of papers in thermophysics, assisting both generators and users of thermophysical properties data. This distinguished journal publishes both experimental and theoretical papers on thermophysical properties of matter in the liquid, gaseous, and solid states (including soft matter, biofluids, and nano- and bio-materials), on instrumentation and techniques leading to their measurement, and on computer studies of model and related systems. Studies in all ranges of temperature, pressure, wavelength, and other relevant variables are included.