Investigação experimental de termossifões contendo nanofluido de pentóxido de nióbio com diferentes concentrações mássicas

Abstract

This study presents an experimental investigation of the thermal performance of thermosyphons used for the cooling of electronic systems, employing distilled water and particles niobium pentoxide-based nanofluids as working fluids, at two different mass concentrations: 1.0 and 0.1g/L. The thermosyphons were made of copper, with an inner diameter of 7.75mm, outer diameter of 9.45mm, and total length of 200mm, operating vertically under thermal loads ranging from 5 to 45W. The results showed that the use of niobium pentoxide nanofluid significantly improved the thermal performance of the thermosyphons, with reductions of up to 47% in operating temperature and 81% in thermal resistance for the 1.0g/L concentration. For the 0.1g/L sample, maximum reductions of 38 and 87% were observed, respectively. The lowest concentration provided the best performance, establishing it as the best concentration among those tested for thermal applications.