Thermo-physical properties of waste cooking oil-based nanofluids

In order to reduce the cost of loss of industrial machinery and protect environment, waste cooking oil could be used in industrial machinery. However, the thermal efficiency of waste cooking oil is limited. It will cause the damage of the machines because of overheating. Recently, nanofluid is one of the most popular fluids in recent scientific community, which exhibits attractive heat transfer properties. In this paper, thermal conductivity, viscosity and dielectric constant of nanofluids have been investigated at a certain conditions for studying its thermo-physical property. Authors used two-step method to fabricate SiC/TiO2 oil-based nanofluids. The effects of dispersant, temperature and concentration on thermal conductivity of nanofluids were investigated. In result, adding nanoparticles in the waste cooking oil, which effectively improved the solution of heat transfer rate and enhanced the rheology behavior. It also has lubricant effect, reduces the loss of machine and reduces the pollution of the waste cooking oil to the environment.