Oil Cooling For Marine Transformers: An Efficient Heat Dissipation Solution Suitable For Marine Environments

1, Core cooling method
Oil immersed self cooling (ONAN): relying on natural convection of oil for heat dissipation, with a simple structure and high reliability, suitable for small and medium-sized marine transformers, requiring no additional power and low maintenance costs.
Oil immersed air cooling (ONAF): By adding a fan on top of self cooling, the heat dissipation efficiency can be increased by 50% -60%, and the capacity can be increased by more than 30%. It is suitable for medium capacity and high load fluctuation ship scenarios.
Forced oil circulation water cooling (OFWF): The oil pump drives the hot oil to exchange heat through a water cooler, with the highest cooling efficiency. It is suitable for high-power transformers in large ships and offshore platforms, and needs to ensure that the oil pressure is higher than the water pressure to prevent water from seeping into the oil.

2, Marine Environment Adaptation Design
Corrosion and salt spray resistance: The fuel tank is mostly made of 316L stainless steel, combined with epoxy zinc rich paint protection, and has passed a 2000 hour neutral salt spray test to resist marine salt spray erosion.
Anti sway impact: structurally reinforced design, capable of withstanding 22.5 ° sway and 15 ° tilt, with oil circulation and sealing system adapted to ship dynamic working conditions.
Temperature control and safety: Install oil temperature and winding temperature monitoring. The upper oil temperature usually does not exceed 55 ℃. The strong oil circulation system needs to be linked to start and stop to ensure safe operation.
3, Application and advantages
Oil cooled ship transformers are widely used in bulk carriers, oil tankers, and offshore platforms. Compared with dry-type transformers, they have stronger heat dissipation capabilities and better overload performance, which can meet the high-power and continuous power supply needs of ships; At the same time, insulating oil can buffer impact, reduce noise, and adapt to the complex electrical environment of ships.