How does a submarine ballast tank work?

When the ballast tanks are filled with air, the submarine rises to the surface because it has positive buoyancy. With water inside the tanks, the sub has negative buoyancy so it sinks deeper into the ocean.

Simply so, what is a submarine ballast?

To control its buoyancy, the submarine has ballast tanks and auxiliary, or trim tanks, that can be alternately filled with water or air (see animation below). When the submarine is on the surface, the ballast tanks are filled with air and the submarine’s overall density is less than that of the surrounding water.

Similarly, how does a ballast pump work? It is a pump for transferring or discharging water ballast. Ballast pump is usually in a pump room on board the ships or vessels. Together with the tank, pipe, valves, it is composited of the ballast system. When cargo has been discharged, it is used to improve vessel’s stability.

Similarly one may ask, how does a submarine submerge and then float on water?

Submarines float on the surface by using ballast tanks full of air. There are valves at the top of the ballast tanks that are opened when it’s time for the submarine to submerge. As the air escapes, seawater comes in a the bottom of the tank. It makes the sub heavier, and then it submerges.

How does a nuclear powered submarine work?

Nuclear submarines employ nuclear reactors for this task. They either generate electricity that powers electric motors connected to the propeller shaft or rely on the reactor heat to produce steam that drives steam turbines (cf. Submarines may carry nuclear fuel for up to 30 years of operation.

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