Surface modification of carbon nanotubes with copper oxide nanoparticles for heat transfer enhancement of nanofluids

摘要: Over the last few years, nanoparticles have been used as thermal enhancement agents in many heat transfer based fluids to improve conductivity of fluids. Recently, experiments carried out prepare different types nanofluids (NFs) showing a tremendous increase base with addition small amount nanoparticles. However, little experimental work has proposed calculate flow behaviour and exact mechanism for effective exchangers. This study mainly focuses on development nanomaterial composites by incorporating copper oxide (CuO) onto surfaces carbon nanotubes (CNTs). The CNT–CuO nanocomposite was water-based NFs. morphological loading contents were characterized using field emission scanning electron microscopy (FE-SEM), transmission (TEM), X-ray photoelectron spectroscopy (XPS) thermogravimetric analysis (TGA) while physical properties differential calorimetry (DSC), Mathis TCi system viscosity meter measuring capacity, synthesized NFs, respectively. pressure drop studies NFs conducted horizontal steel tube counter-flow exchanger under turbulent conditions. results showed that developed concentrations modified CNTs (0.01, 0.05 0.1 wt%) yielded significant specific capacity (102% higher than pure water) (26% even at low concentration. also revealed rate NF liquid (water) increased increasing concentration Furthermore, no effect observed.