SYNTHESIS AND CHARACTERIZATION OF HYBRID NI-SIO2 NANOPARTICLES IN WATER- GLYCERIN BASE LIQUIDS FOR HEAT TRANSFER APPLICATIONS

摘要

The invention relates to hybrid nanoparticles of NiSiO2 were mixed in different proportions (hybrid) in water Glycerin base liquid and estimation of dispersion behavior, determination of the effective thermal conductivity and viscosity and the estimation of forced convection heat transfer coefficients undertaken which are useful in the design of heat exchangers. The fundamental knowledge of the interactions of various parameters due to enhanced nanofluid thermal conductivity by 25% is useful in size reduction by 8 - 12% and consequently the cost of an automobile radiator and heat exchangers. In the present invention a method for heat transfer augmentation, said method comprises:(a) Preparing nanoparticles of Ni; (b) synthesizing of SiO2 nanoparticles; (c) Preparing Ni-SiO2 hybrid particles from said nanoparticles of Ni and said SiO2 nanoparticles; and(d) Synthesizing of stable hybrid nanofluids of said Ni- SiO2 hybrid particles in Water-Glycerin base liquid is disclosed.