Virgin coconut oil dielectrical properties as electrical insulation material

Abstract

Mineral oil played an important role as insulating liquid such as to reduce failure, ageing effect, increase the life span and heat transfer agent. Mineral oil had a good dielectric strength and cooling performance but it had serious negative environmental impact like non-biodegradable, non-renewable resource and difficult to dispose when it deteriorates completely. Hence, virgin coconut oil (VCO) was chosen as alternative to replace mineral oil since it biodegrades completely without toxic and easy to get in the tropical country. Three dielectric tests were conducted to investigate the dielectric properties of VCO. Those were breakdown voltage, water content and kinematic viscosity. A study about the effect of the moisture level of VCO on the breakdown voltage and kinematic viscosity was also presented. VCO and mineral oil also undergone heating process to reduce moisture in sample. The study showed that VCO has good potential breakdown voltage with the ability to absorb a lot of moisture keeping the KRAFT paper dry. However, VCO had very high kinematic viscosity compared to mineral oil. Further, the rate of breakdown voltage decreases with increasing of moisture of VCO was lower than mineral oil.

The Use of Single-Phase Immersion Cooling by Using Two Types of Dielectric Fluid for Data Center Energy Savings

“…The low VCO's effectiveness was related to its high viscosity that affect in a convention reduction of heat transfer rate [24]. It also has a high-water vapor absorption capacity, resulting in fluctuate water content [24,27]. However, the VCO's viscosity at operating temperature (40-100 • C) was better than sunflower oil and soya oil based on other research [28].…”

“…This indicated that the VCO's ability to cool was damaged. The low VCO's effectiveness was related to its high viscosity that affect in a convention reduction of heat transfer rate [24]. It also has a high-water vapor absorption capacity, resulting in fluctuate water content [24,27].…”

“…With this open system, the material was also easily dirty and its fluid thickens faster, increasing its viscosity because it binds to dust scattered in the room. The more viscosity of dielectric fluid affects to lowering the convection heat transfer [24]. To overcome this situation, a combination of immersion cooling is needed with a closed system method, such as in a car engine radiator application.…”