Sharda University School of Engineering and TechnologyDepartment of Mechanical & Automobile Engineering SUBMERSIBLE PUMP A Report of a Seminar delivered by Mehul Gupta in Partial Fulfillment of the Degree Requirements as per SU Syllabus for the award ofBachelor of Technology (Mechanical Engineering) Batch of12009-13
CONTENT 2 Introduction Types of pump Centrifugal pump Submersible pump Working principle of submersible pump Application Disadvantage
INTRODUCTION OF PUMP 3Pump is a machine or mechanic equipment which isrequired to lift liquid from low level to high level orto flow liquid from low pressure area to highpressure area .low pressure at suction side of pump and a highpressure at discharge side of pump.Principally, pump converts mechanic energy ofmotor into fluid flow energy. Energy which isreceived by fluid will be used to lift pressure and tobridge over resistances which are exists in the linethat passed.
TYPES OF PUMPS 41. POSITIVE DISPLACEMENT High pressure Low flow Flow does not change when pressure changes2. CENTRIFUGAL Low pressure High flow flow changes when pressure changes
Pumps Used in Building Services 5 Sump Pumps Monobloc Bore well Pumps Submersible Pumps Jet Pumps
CENTRIFUGAL PUMPS 6 centrifugal pump is a rotodynamic pump that uses a rotating impeller to create flow by the addition of energy to a fluid. Centrifugal pumps are commonly used to move liquids through piping. The fluid enters the pump impeller along or near to the rotating axis and is accelerated by the impeller, flowing radially outward into a diffuser or volute chamber (casing), from where it exits into the downstream piping. Centrifugal pumps are used for large discharge through smaller heads
Submersible pump 8 A submersible pump (or electric submersible pump (ESP) is a device which has a hermetically sealed motor close-coupled to the pump body. The whole assembly is submerged in the fluid to be pumped. A submersible pump is a pump that is able to be placed underwater and still carry out its intended purpose. Some pumps may be designed to work while being fully submerged, whereas others may be submerged or placed in a dry area. A submersible water pump pushes water to the surface, instead of sucking the water out of the ground like above ground water pumps.
Working principle 10 The submersible pumps used in ESP installations are multistage centrifugal pumps operating in a vertical position. Although their constructional and operational features underwent a continuous evolution over the years, their basic operational principle remained the same. Produced liquids, after being subjected to great centrifugal forces caused by the high rotational speed of the impeller, lose their kinetic energy in the diffuser where a conversion of kinetic to pressure energy takes place.
•The pump shaft is connected to the protector by amechanical coupling at the bottom of the pump. Wellfluids enter the pump through an intake screen andare lifted by the pump stages.•Other parts include the radial bearings (bushings)distributed along the length of the shaft providingradial support to the pump shaft turning at highrotational speeds.•An optional thrust bearing takes up part of the axialforces arising in the pump but most of those forcesare absorbed by the protector’s thrust bearing. 11
Applications 13Submersible pumps are found in many applications: Single stage pumps are used for drainage, sewage pumping, general industrial pumping and slurry pumping. They are also popular with aquarium filters. Multiple stage submersible pumps are typically lowered down a borehole and used for water abstraction, water wells and in oil wells.
ADVANTAGE 14 Efficiency: Compared to the ordinary pumps, the submersible pumps are more efficient as it pumps liquid which is close to the pump. It therefore functions less than the ordinary pumps. As these pumps are placed inside the sumps, it can detect the level of water quite easily.
15 Noise level: The submersible pumps seldom produce less amount of noise as it is submerged under water. The walls of the sump help to soften the sounds caused by the pumps. The ordinary pumps are placed outside the wells or sumps which creates a huge amount of noise.
16 Safe: These pumps are quite safe compared to the other types of pumps as all the potential dangerous components of the pumps are placed under water. It is usually covered and seldom involves the prospects of children tampering with its internal components and valves.
DISADVANTAGE 17 The largest disadvantage of these pumps is that you put it in the water. This means it will have a shorter life because it is sitting in and sucking up muck from your pond. It is also harder to clean and maintenance because it is sitting on the bottom of the pond. There is the chance the pump will become corroded and lose its seals, thus allowing liquid to penetrate into the motor housing and causing substantial damage to the unit.
CONCULSION 18 The submersible pump was driven by its own power source – mains electricity or generator – so the eductor trucks could switch off their engines while being filled. This reduced fuel costs to the eductor companies. Moreover, it reduced the amount of noise generated by the works, such that there was a noticeable reduction in impact on adjoining residents. This was the same pattern for both the mains electricity version, and the generator-driven version, which was extensively sound-proofed.
19 In our opinion, a submersible pump may have a place in heavily populated residential areas as a source of water supply. In this application the submersible advantage of quite operation, unobtrusive surface equipment and low initial cost may outweigh the disadvantag.