Progress in Industrial Ecology An International Journal · 2017 · 12 citations · 0 references
EngineeringChemical EngineeringMaterials ScienceHeat TransferNanomaterialsTransport PhenomenaHeat ConductionHeat FlowHeat Transfer In FluidsSolar Energy SystemsSolar RadiationSolar Thermal SystemsConcentrating Solar CollectorsDispersant ApplicationDispersant ChemistryHeat Transfer FluidsSolar-to-thermal Conversion EfficiencyThermal Fluid Dynamics
Co3O4-H2O solution along with surfactant is subjected to magnetic stirring and ultra-sonication at 60°C. The obtained homogenous dispersant was divided into four samples of varying volume fractions 0.1vol% to 0.4vol%.Each sample was filled in a metered tank and recirculated in a closed loop solar thermal collector. The setup was subjected to incident solar flux with an average value of 650 W/m2.At a constant fluid flow of 4LPM, the heat transfer coefficient was evaluated for different volume fractions of nanofluid. The obtained values are compared with the values for water as the working fluid. It was observed that at 0.4vol% of nanofluid and 60°C fluid temperature, the heat transfer coefficient increased by 8% when compared to the values for water.