Thermo-optical characterization of novel MXene/Carbon-dot hybrid nanofluid for heat transfer applications

纳米流体 热导率 材料科学 太阳能集热器中的纳米流体 纳米材料 传热 吸收(声学) 量子点 化学工程 纳米技术 纳米颗粒 热的 复合材料 热力学 物理 光电-热混合太阳能集热器 工程类
作者
Sreehari Sreekumar,Abhijit Ganguly,Sameh Khalil,Supriya Chakrabarti,Neil Hewitt,Jayanta Deb Mondol,Nikhilkumar Shah
出处
期刊:Journal of Cleaner Production [Elsevier]
卷期号:434: 140395-140395 被引量:16
标识
DOI:10.1016/j.jclepro.2023.140395
摘要

Nanofluid has emerged as a promising heat transfer fluid (HTF) due to their significant thermophysical, and optical characteristics enhancement over base fluids. Hybrid nanofluids with multiple nanomaterials have the advantage of synergistic properties in comparison to monocomponent nanofluids. The present study proposes an energy-efficient and cleaner synthesis method for developing carbon quantum dot (C-dot), MXene, and a hybrid MXene/C-dot hybrid nanofluids, for heat transfer application. In-situ microwave pyrolysis technique and two-step method were adopted for nanomaterial and nanofluid synthesis. The morphological, phase structural, chemical, and elemental compositional analysis of the nanomaterials was performed. The material characterization confirms the hybridization of C-dot on MXene nanosheets. The thermal conductivity and volumetric heat capacity of the nanofluids were measured using the transient plane source (TPS) method. Thermal conductivity was observed to increase with nanofluid concentration and temperature. Results indicate that MXene has the highest thermal conductivity enhancement (50 %) over water, followed by hybrid (42.2 %) and C-dot nanofluid (33.2 %). The volumetric heat capacity of nanofluids decreased with concentration and temperature. A semi-empirical correlation, as a function of nanofluid concentration and temperature, was coined for predicting thermal conductivity and volumetric heat capacity. Optical property characterization study shows that C-dot nanofluid exhibited considerable absorption along the UV range, while MXene nanofluid showed absorption in the visible and near-infrared (NIR) region. Hybrid nanofluids demonstrated complementary absorption properties of C-dot and MXene nanofluids.
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