Affiliation:
1. Department of Thermo-Chemical Processes and Nanotechnologies, Gas Institute of National Academy of Sciences, 39 Degtyarivska str., Kyiv, 03113, Ukraine
Abstract
Current study was dedicated to explore cooling performance of TiO2 nanofluid. Preliminary tests have shown the possibility of significant improvement of emergency cooling performance by nanofluids in the case of overheated surfaces. Tests that were held during current investigation
were performed with cylinders of stainless steel, which were used as an overheated surface. The temperature was recorded by a digital system of 3 type-K thermocouples. The object, preheated in a furnace to high temperatures (600–800 °C), was immersed into boiling distilled water.
Usage of the set of thermocouples allows to determine heat flow in steel cylinder by its temperature distribution. The implementation of emergency cooling was to add a certain amount of nanofluid concentrate to the volume of boiling distilled water. The experiment was continued until the complete
cooling of the object (up to 100 °C—the temperature of the surrounding liquid). Calculations confirmed increase of heat transfer coefficient for NF and, respectively, about 40% decrease in cooling time for NanoFluid compared to distilled water was observed. Three method of determination
of heat transfer coefficient were compared.
Publisher
American Scientific Publishers
Subject
Fluid Flow and Transfer Processes,Mechanical Engineering
Cited by
2 articles.
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