Abstract
To evaluate the synthesis and characterization of MWCNT (Multi-walled Carbon Nanotubes) with different degrees of functionalization in distilled water. The thermophysical properties (thermal conductivity and viscosity) of these nanofluids were measured at a temperature range (20-60°C) and concentrations (0.005-0.05%) by volume. Increases in thermal conductivity and viscosity were found 9.3% and 4.7%, respectively, at a volumetric concentration of 0.01% at a temperature of 30°C. The study of new fluids that improve the rate of removal of heat is fundamental to obtain greater efficiency of energy systems. Among the several factors that compromise the efficiency of the energy systems, we can highlight the thermophysical limitations of the conventional fluids, inhibiting in a very significant way some industrial applications. In this work we intend to improve the heat transfer characteristics of fluids commonly used by the addition of nanoparticles, made up of carbon nanotubes, in water which is the most used fluid for the cooling of nuclear reactors in operation today. It is intended to improve the heat transfer characteristics of fluids commonly used by the addition of nanoparticles, made of carbon nanotubes, through the addition of nanoparticles, made up of carbon nanotubes, in water which is the most used fluid for refrigeration of nuclear reactors currently in operation. In order to assess its benefits for the applicability and nuclear systems, ie primary coolant, safety systems, major accident mitigation strategies.
Highlights
A nanofluids are composed of colloidal dispersions with a traditional refrigerant as a base on which the nanoparticles are suspended
In view of energy security and environmental concern, the performance of the refrigeration system needs to be improved, which can be done by modifying the systems or properties of the primary and secondary working fluids
Nanofluids or hybrid nanofluids have gained interest in many engineering fields because of their excellent thermophysical properties, which can be used in refrigeration and air conditioning systems for many performance enhancing functions
Summary
A nanofluids are composed of colloidal dispersions with a traditional refrigerant as a base on which the nanoparticles are suspended. They became part of the scientific scenario in 1995, when researcher Stephen US Choi and his collaborators aimed to improve the heat transfer process for optical elements of high-flow X-ray apparatus in Argonne National Laboratory and reported significant improvements in heat transfer performance [1]. In view of energy security and environmental concern, the performance of the refrigeration system needs to be improved, which can be done by modifying the systems or properties of the primary and secondary working fluids. Nanofluids or hybrid nanofluids have gained interest in many engineering fields because of their excellent thermophysical properties, which can be used in refrigeration and air conditioning systems for many performance enhancing functions
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