Olmo Cristian, Méndez Cristina, Ortiz Félix, Delgado Fernando, Ortiz Alfredo
Electrical and Energy Engineering Department, University of Cantabria, 39005 Santander, Cantabria, Spain.
Nanomaterials (Basel). 2020 Mar 26;10(4):603. doi: 10.3390/nano10040603.
The assessment of a TiO vegetal-based dielectric nanofluid has been carried out, and its characteristics and behavior have been tested and compared with a previously tested maghemite nanofluid. The results obtained reflect a similar affectation of the main properties, with a maximal improvement of the breakdown voltage of 33% at 0.5 kg/m, keeping the thermal conductivity and the viscosity almost constant, especially the first one. This thermal characterization agrees with the results obtained when applying the TiO optimal nanofluid in the cooling of an experimental setup, with a slightly worse performance than the base fluid. Nevertheless, this performance is the opposite to that noticed with the ferrofluid, which was capable of improving the cooling of the transformer and decreasing its temperature. The similarities between the characterizations of both nanofluids, the differences in their cooling performances and their different magnetic natures seem to point out the presence of additional thermomagnetic buoyancy forces to support the improvement of the cooling.
已对一种基于二氧化钛的植物基介电纳米流体进行了评估，并测试了其特性和行为，并与先前测试的磁赤铁矿纳米流体进行了比较。获得的结果反映了主要性能的类似影响，在0.5 kg/m时击穿电压最大提高了33%，同时热导率和粘度几乎保持不变，尤其是前者。这种热特性与在实验装置冷却中应用二氧化钛最佳纳米流体时获得的结果一致，其性能略逊于基础流体。然而，这种性能与铁磁流体的情况相反，铁磁流体能够改善变压器的冷却并降低其温度。两种纳米流体表征之间的相似性、它们冷却性能的差异以及它们不同的磁性似乎表明存在额外的热磁浮力来支持冷却的改善。
