Natural Convection Heat Transfer Enhancement using Functionalized Nanodiamonds in Transformer Oil
- Resource Type
- Conference
- Authors
- Prabhu, Vinit V.; Languri, Ethan; Davidson, Jim L.; Kerns, David; Costa, Lino; Wilson, Glenn
- Source
- 2022 21st IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (iTherm) Thermal and Thermomechanical Phenomena in Electronic Systems (iTherm), 2022 21st IEEE Intersociety Conference on. :1-4 May, 2022
- Subject
- Aerospace
Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Computing and Processing
Engineered Materials, Dielectrics and Plasmas
Photonics and Electrooptics
Power, Energy and Industry Applications
Robotics and Control Systems
Transportation
Temperature
Cooling
Oils
Thermomechanical processes
Oil insulation
Transformer cores
Containers
Functionalized Nanodiamond (fND)
Natural Convection Heat Transfer
Transformer Cooling
- Language
- ISSN
- 2694-2135
Efficient transformer cooling is an important factor in increasing the lifetime of transformer and reducing the associated maintenance costs. It has been reported that the lifetime of the transformer is increased by 10% with 1 °C decrease in the core temperature. The transformer oil which is a typically a mineral oil, used commonly in cooling of transformers has an inherent disadvantage of low thermal conductivity. This limits the amount of heat transfer from the core of the transformer to the surroundings. This research discusses the improvement of thermal conductivity of transformer oil by using functionalized nanodiamond (fND) particles in transformer oil. In this study, enhancement in natural convection heat transfer is studied by using two different concentrations (0.2 wt.% and 0.4 wt.%) of fND in transformer oil and compared with the base transformer oil. A tall container insulated from all sides and heated from one side is considered for the experiment's geometry. The natural convection is observed in the container and the experimental results are validated with the theoretical model. The observed enhancement in heat transfer coefficient for 0.2 wt.% sample was 41.7% and for 0.4 wt.% sample was 82.5%.