Experimental study of thermal conductivity, viscosity and breakdown voltage of mineral oil-based TiO2 nanofluids
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Enio P. Bandarra Filho
Abstract
The nanofluids applied to transformer oil base can be considered the new insulating fluids for the next generation, since the potential to improve the dielectric strength and thermal performance of the transformer compared to pure mineral oils. In this study, performance tests of nanofluids with TiO2 nanoparticles were performed to dielectric strength with various values of volume concentration and compared with the performance of the pure oil. Additionally, thermal conductivity and viscosity were experimentally measured. The dielectric strength (breakdown voltage AC) of nanofluids were obtained by measuring the breakdown voltage of the samples in a dielectric strength tester. The experimental results showed that the volume concentration of 0.05 % showed the largest increase of dielectric strength. Furthermore, it was obtained an increase in the thermal conductivity of 3-4 % and no significant change in the viscosity, showing good potential to application.
Abstract
The nanofluids applied to transformer oil base can be considered the new insulating fluids for the next generation, since the potential to improve the dielectric strength and thermal performance of the transformer compared to pure mineral oils. In this study, performance tests of nanofluids with TiO2 nanoparticles were performed to dielectric strength with various values of volume concentration and compared with the performance of the pure oil. Additionally, thermal conductivity and viscosity were experimentally measured. The dielectric strength (breakdown voltage AC) of nanofluids were obtained by measuring the breakdown voltage of the samples in a dielectric strength tester. The experimental results showed that the volume concentration of 0.05 % showed the largest increase of dielectric strength. Furthermore, it was obtained an increase in the thermal conductivity of 3-4 % and no significant change in the viscosity, showing good potential to application.
Kapitel in diesem Buch
- Frontmatter I
- Preface V
- Contents VII
- About the editors XI
-
Part I: Future cities
- Biopotent social technology: occupations park and university extensions 1
- Performance potentials: the optimization of buildings in operation 21
- Climate culture building: comparison of different computer generated building envelope designs for different Brazilian climate zones 35
- Electrical energy efficiency in urban infrastructure systems: nonintrusive smart meter for electrical energy consumption monitoring 47
- Distinct approaches to reproduce hygrothermal behavior of building materials based black-box models 61
-
Part II: Modern urban agriculture
- Investigating the challenges and opportunities of urban agriculture in global north and global south countries 95
- Social technology and urban agriculture in Brazil: the social technology network and the social technology DataBank project 111
- Orchards from the forest: Urban agriculture as a lab for multiple learning 121
-
Part III: Renewable energy
- The challenges of the new energy revolution 137
- Synthesis of inorganic energy materials 159
-
Part IV: Sustainable smart materials
- Nature-inspired smart materials for multifunctional applications 177
- Smart fiber-reinforced polymer composites and their resource-efficient production by means of sensor integration 191
- The role of biologically inspired design to 4D printing development 205
- Influence of different carbon nanotubes types in dynamic-mechanical properties of lightweight carbon felt/CNTs composites 215
- Light-assisted synthesis of colloids and solid films of metallic nanoparticles 225
- The influence of polymeric interlayers on damping behavior of a fiber metal laminate 239
- Piezoresistivity of low carbon nanotubes content in elastomeric polymer matrix 259
- Improvement of fatigue strength of carbon fiber reinforced polymers by matrix modifications for ultrafast rotating flywheels 279
- Experimental study of thermal conductivity, viscosity and breakdown voltage of mineral oil-based TiO2 nanofluids 290
Kapitel in diesem Buch
- Frontmatter I
- Preface V
- Contents VII
- About the editors XI
-
Part I: Future cities
- Biopotent social technology: occupations park and university extensions 1
- Performance potentials: the optimization of buildings in operation 21
- Climate culture building: comparison of different computer generated building envelope designs for different Brazilian climate zones 35
- Electrical energy efficiency in urban infrastructure systems: nonintrusive smart meter for electrical energy consumption monitoring 47
- Distinct approaches to reproduce hygrothermal behavior of building materials based black-box models 61
-
Part II: Modern urban agriculture
- Investigating the challenges and opportunities of urban agriculture in global north and global south countries 95
- Social technology and urban agriculture in Brazil: the social technology network and the social technology DataBank project 111
- Orchards from the forest: Urban agriculture as a lab for multiple learning 121
-
Part III: Renewable energy
- The challenges of the new energy revolution 137
- Synthesis of inorganic energy materials 159
-
Part IV: Sustainable smart materials
- Nature-inspired smart materials for multifunctional applications 177
- Smart fiber-reinforced polymer composites and their resource-efficient production by means of sensor integration 191
- The role of biologically inspired design to 4D printing development 205
- Influence of different carbon nanotubes types in dynamic-mechanical properties of lightweight carbon felt/CNTs composites 215
- Light-assisted synthesis of colloids and solid films of metallic nanoparticles 225
- The influence of polymeric interlayers on damping behavior of a fiber metal laminate 239
- Piezoresistivity of low carbon nanotubes content in elastomeric polymer matrix 259
- Improvement of fatigue strength of carbon fiber reinforced polymers by matrix modifications for ultrafast rotating flywheels 279
- Experimental study of thermal conductivity, viscosity and breakdown voltage of mineral oil-based TiO2 nanofluids 290
