High-heat conductivity coefficient water-based nanofluid and preparation method thereof

Abstract

The invention discloses high-heat conductivity coefficient water-based nanofluid and a preparation method thereof. The high-heat conductivity coefficient water-based nanofluid is prepared from the following raw materials in percentage by weight: 0.05-0.15 percent of nanoparticles, 99.73-99.90 percent of distilled water and 0.05-0.12 percent of dispersing agent. The water-based nanofluid stable in suspension prepared by adopting a two-step method is simple in process and low in cost, the nanoparticles in the nanofluid are small in particle size, low in content and narrow in distribution range, the collision frequency among the nanoparticles is low, the dispersing stability is high and can be stably maintained for 30-60 days, compared with that of a water medium, the heat conductivity coefficient of the nanofluid is increased by 10.1-15.8 percent, the nanofluid is widely applied to the fields of aerospace, electronics, medical treatment, chemical industry, buildings and foods, high-efficiency low-resistance compaction and other performance indexes of heat exchange equipment can be greatly improved, and the volume of the heat exchange equipment is reduced.

Description

technical field [0001] The invention relates to a heat transfer or cooling working medium, in particular to a nanofluid heat transfer or cooling working medium. Background technique [0002] With the rapid development of science and technology and the increasingly prominent energy problems, the heat transfer load and heat transfer intensity of the heat exchange system are increasing day by day. The requirements for performance indicators such as compact resistance are getting higher and higher, and new and higher requirements are put forward for enhanced heat transfer technology, such as thermal control of spacecraft, cooling of high-temperature superconductors, thermal control in thin film deposition, and strong laser mirrors. Cooling and heat dissipation of high-power electronic components, etc. Therefore, there is an urgent need to develop high-efficiency and compact heat exchange equipment with small size, light weight, and good heat transfer performance to meet the req...

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Problems solved by technology

[0006] For example, the patent document whose publication number is "CN1115372C" discloses a nanofluid material that can be used as a heat transfer cooling fluid. % liquid medium and 0.2%-0.5% dispersant or surfactant, the composition of this nanofluid material is unreasonable, the content of nanoparticle particles is large, resulting in high collision frequency between nanoparticles in nanofluid, easy to Cause particle aggregation, and then form agglomeration, and the agglomerates are easy to settle, which is not conducive to the formation of a uniform and stable suspension, thus affecting the improvement of the thermal conductivity of the nanofluid. Through experiments, this nanofluid can only last for about 1-3 days, which cannot meet the requirements of large Requirements for some products on heat transfer cooling fluid