Minea Alina Adriana
Faculty of Materials Science and Engineering, "Gheorghe Asachi" Technical University of Iasi, 700050 Iasi, Romania.
Nanomaterials (Basel). 2021 Jan 3;11(1):86. doi: 10.3390/nano11010086.
Research on nanoparticle enhanced fluids has increased rapidly over the last decade. Regardless of several unreliable reports, these new fluids have established performance in heat transfer. Lately, polyethylene glycol with nanoparticles has been demarcated as an innovative class of phase change materials with conceivable uses in the area of convective heat transfer. The amplified thermal conductivity of these nanoparticle enhanced phase change materials (PCMs) over the basic fluids (e.g., polyethylene glycol-PEG) is considered one of the driving factors for their improved performance in heat transfer. Most of the research, however, is centered on the thermal conductivity discussion and less on viscosity variation, while specific heat capacity seems to be fully ignored. This short review abridges most of the recent investigations on new PEG-based fluids and is dedicated especially to thermophysical properties of the chemicals, while a number of PEG-based nanofluids are compared in terms of base fluid and/or nanoparticle type and concentration. This review outlines the possibility of developing promising new heat transfer fluids. To conclude, this research is in its pioneering phase, and a large amount of experimental and numerical work is required in the coming years.
在过去十年中，对纳米颗粒增强流体的研究迅速增加。尽管有一些不可靠的报告，但这些新型流体在传热方面已展现出性能优势。最近，含有纳米颗粒的聚乙二醇已被划定为一类创新的相变材料，在对流换热领域具有潜在应用价值。这些纳米颗粒增强相变材料（PCM）相对于基础流体（如聚乙二醇 - PEG）而言，其热导率的提高被认为是它们在传热性能改善方面的驱动因素之一。然而，大多数研究集中在热导率的讨论上，而对粘度变化的关注较少，比热容似乎完全被忽视了。这篇简短的综述总结了最近对新型聚乙二醇基流体的大部分研究，特别关注这些化学物质的热物理性质，同时比较了多种聚乙二醇基纳米流体在基础流体和/或纳米颗粒类型及浓度方面的差异。这篇综述概述了开发有前景的新型传热流体的可能性。总之，这项研究尚处于开拓阶段，未来几年需要大量的实验和数值研究工作。
