What is a submersible pump and how does it work?

Question

It is used in a water pumping station.

Answer 1

A submersible pump is a pump which has a hermetically sealed motor close-coupled to the pump body. The whole assembly is submerged in the fluid to be pumped. The advantage of this type of pump is that it can provide a significant lifting force as it does not rely on external air pressure to lift the fluid.


ESP systems are effective for pumping produced fluids to surface.A system of mechanical seals are used to prevent the fluid being pumped entering the motor and causing a short circuit. The pump can either be connected to a pipe, flexible hose or lowered down guide rails or wires so that the pump sits on a "ducks foot" coupling, thereby connecting it to the delivery pipework.

Submersible pumps are found in many applications, single stage pumps are used for drainage, sewage pumping, general industrial pumping and slurry pumping. Multiple stage submersible pumps are typically lowered down a borehole and used for water abstraction or in water wells.

Submersible pumps are also used in oil wells. By increasing the pressure at the bottom of the well significantly, more oil can be produced from the well compared to natural production. This makes Electric Submersible Pumping (ESP) a form of "artificial lift" (as opposed to natural flow) along with Gas Lift, Beam Pumping, Plunger Lift and Progressive cavity pump. New varieties of ESP can include a water/oil separator which permits the water to be reinjected into the reservoir without the need to lift it to the surface.

The ESP system consists of a number of components that turn a staged series of centrifugal pumps to increase the pressure of the well fluid and push it to the surface. The energy to turn the pump comes from a high-voltage (3 to 5 kV) alternating-current source to drive a special motor that can work at high temperatures of up to 300 °F (150 °C) and high pressures of up to 5000 lb/in² (34 MPa), from deep wells of up to 12000 feet (3.7 km) deep with high energy requirements of up to about 1000 horsepower (750 kW). ESPs have dramatically lower efficiencies with significant fractions of gas, greater than about 10% volume at the pump intake. Given their high rotational speed of up to 4000 rpm (67 Hz) and tight clearances, they are not very tolerant of solids such as sand.

Special attention to the type of ESP is required when using certain types of liquids. ESP's commonly used on board naval vessels cannot be used to dewater contaminated flooded spaces. These use a 440 volt A/C motor that operates a small centrifugal pump. It can also be used out of the water, taking suction with a 2-1/2 inch non-collapsible hose. The pumped liquid is circulated around the motor for cooling purposes. There is a possibility that the gasoline will leak into the pump causing a fire or destroying the pump. So hot water and flammable liquids should be avoided.

Answer 2

What Is Submersible Pump

Answer 3

This Site Might Help You.

RE:
What is a submersible pump and how does it work?
It is used in a water pumping station.

Answer 4

What Is A Submersible

Answer 5

It a waterproof pump that go underwater without shorting out. It uses an impeller to move the water. Some impellers look like a star and some look like the Impeller on a car water pump. There different designs depending on the amount of water the pump will pump.

Answer 6

if you think jame is wrong, then go check online or some old dusty textbook. i reckon she knows her stuff.

i would have said that its a pump that works underwater and works by differencial pressures. hehe. i don't know my pumps i guess.....gotta open my pump design textbk that has been collecting dust now do i?

Answer 7

1) Voltage doesn't kill. Amperage does. As little as a few milliamps. If you are solidly grounded, can't get loose and have a weak heart. The amperage interferes with the signal to the heart and can cause it to flutter. Any electrical device in your home has that potential. The good news is that you are not likely to be unable to get loose. Same with your cat. This is why animals nearly always survive chewing through electrical cords. The initial shock cause muscles to contract and in so doing we/they break contact. That's not to say it doesn't hurt! 2) Low water level will result in failure of the pump. It burns up internally. Should not result in current escaping to ground. ie being an electrical shock hazard. 3) I have no idea what they mean by "always run under direct supervision". Try contacting them for an explanation. 4) Yes, the unit itself is of the grounded type. Unfortunately, just because the receptacle you are using has 3 prongs doesn't mean it is properly grounded. In older homes that didn't have a ground it is not uncommon to find the 2 prong outlets have been replaced with 3 prong type without the addition of a grounding means. If your home is say less than 25 years old, they most likely are grounded. For about $6 you can get a 3 prong outlet tester and plug it in to the receptacle. It will tell you if it is or isn't grounded. (spend the extra #3 and get one that also has the push button on it. That feature allows you to also test GFI receptacles and GFCI breakers.) Replacing the existing receptacle with a GFI isn't all that hard. The key is identifying the incoming power (Line) and putting those wires in the correct location. If additional wires are present in the box you have the option of putting them on the Load side terminals of the GFI and thus having GFI protection on outlets "downstream". Or putting them on the Line side terminals along with the incoming hot. This way should the GFI trip nothing else (downstream) looses power. Take a good look at the paper work that came with. Do you see the UL label listed anywhere? If not then I would be concerned. If it is present, you should be just fine.

Answer 8

Listen to JAME, she knows...