Iscentropic flow of a vapor or gas through a nozzle. This article will assist you to know the main functionalities of each type of pump. Positive displacement compressors cab be further divided into reciprocating and rotary compressors. Som,department of mechanical engineering,iit kharagpur. Centrifugal pumps can be classified based on the manner in which fluid flows through the pump. A submersible pump is a pump that is able to be placed underwater and still carry out its intended purpose. Pumps and pumping system bureau of energy efficiency 1 syllabus pumps and pumping system. Purpose of hydraulic pump is to generate flow so that energy conversion from mechanical to.
Consider figure 2 which shows a simple centrifugal pump. Suresh a kartha,department of civil engineering,iit guwahati. Centrifugal pumps rotodynamic pumps end suction pumps. Centrifugal pumps are commonly used to move liquids through a piping system. They add energy directly to a movable boundary, which imparts the energy to the fluid.
A centrifugal pump is a rotodynamic pump that uses a rotating impeller to increase the pressure and flowrate of a fluid. Many turbomachines contain some type of housing or casting that surrounds the rotating blades or rotor, thus forming a n internal flow passageway through. Types of pumps continued positive displacement pump. If you like this article, dont forget to share it on social networks.
In many of the references, you can see them being written pdps and all. This type of pump results in a high head and a low flow. Reciprocating pump in reciprocating pumps, the chamber is a stationary cylinder that contains a piston or plunger. The second type of pump is the positive displacement design, the most common of which is the diaphragm type. Introduction to fluid machinery turbines, pumps, blowers. Some of the rotary pumps are centrifugal pumps, axial flow pumps. Positive displacement machines denoted as the static type. Mod01 lec16 matching of pump and system characteristics. Great range of misalignment allowable these couplings are applicable for a wide variety of systems because of their great range of allowable misalignment. We suggested that, there are two main classification of pumps. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Valves in a pump perform a crucial function of regulating, controlling and directing the flow of fluids in a reciprocating pump. They are of various types as discussed in the next suctions.
It is a hydraulic machine which converts mechanical energy into hydraulic energy. Nptel syllabus fluid mechanics web course course outline the basic purpose of this course is to introduce 2nd year chemical students to the concepts of fluid mechanics. And the second type is dynamic or momentumchange pumps. Mod01 lec01 introduction to fluid machines 1 youtube. Common types check non return valves check valves or non return valves are designed to ensure one way flow only. Pump design 1classification of water pumps water pumps can be divided into three types. Machinery fault diagnosis and signal processing by prof.
There are many types of valves available such as disc valve, where the valve is opened and closed by a disc and provides excellent performance for. Unlike the ssme, the ariane v has just one hydrogen and one oxygen pump as shown in figure 11. Classification of pumps types of pumps and their working. Pumps are generally grouped into two broad categoriespositive displacement pumps and dynamic centrifugal pumps. The whole assembly is submerged in the fluid to be pumped. Chapter 7 lasers after having derived the quantum mechanically correct suszeptibility for an inverted atomic system that can provide gain, we can use the twolevel model to study the laser and its dynamics.
This type uses a rotating impeller to draw water into the pump and pressurize the discharge flow. Volumetric output delivery rate or capacity is the amount of liquid that a pump can deliver at its outlet port per unit of time at a given drive speed, usually expressed in gpm or cubic inches per minute. Iit kharagpur notes converted into high quality audio source nptel. The manner in which fluid flows through the pump is determined by the design of the pump casing and the impeller. Positive displacement pumps can be of reciprocating and rotary type. Fundamentals of fluid mechanics chapter 12 pumps and. Mechanical engineering types and performance of pumps and compressors essam e. How does the lobe pump differ from the other gear type pump. Submersible pump 8 a submersible pump or electric submersible pump esp is a device which has a hermetically sealed motor closecoupled to the pump body.
In centrifugal pumps the direction of flow of the fluid changes by ninety degrees as it flows over impeller, while in axial flow pumps the direction of flow is unchanged. Types of pumps pdf 20200422 infusion pump wikipedia characteristics of cr injectors denso industrial valves manufacturers industrial valves market. Here we give just a few examples of pumps from a range of di. The type of pump, as well as selection, mainly depend on our requirement. Read here to know about various types of air compressors used and get a clear inside view of each type of compressor with the attached pictures. Positive displacement pumps use a mechanical means to vary the size of or move the fluid chamber to cause the fluid to flow. Screw pumps are a special type of rotary positive displacement pump in which the flow through the pumping elements is truly axial. As from the construction point of view a pump and a motor from a particular. The fluid enters the pump impeller along or near to the rotating axis and is accelerated by the impeller, flowing radially.
Mohanty,department of mechanical engineering,iit kharagpur. Extract energy from the fluid the fluid does work on them. Common rental pumps include standard, trash and submersible models. With seemingly endless variety of pump sizes and types on the market, it can be confusing. Types, performance evaluation, efficient system operation, flow control strategies and energy conservation opportunities 6. The theory of this dynamic pump is based on the very simple concept of change in. Different types of pumps are suitable for pumping of various media differing in viscosity, toxicity, abrasiveness and many other parameters. Volutes will be considered in more detail later in this section. Nptel chemical engineering chemical engineering design ii joint initiative of iits and iisc funded by mhrd page 2 of 31 lecture 1. The application mainly includes the type of fluid you desire to pump. Centrifugal pumps the centrifugal pump produces a head and a flow by increasing the velocity of the liquid through the machine with the help of a rotating vane impeller.
Introduction to fluid machines and compressible flow by prof. Centrifugal pumps develop pressure by increasing the velocity of the liquid liquid is literally flung out of the cutwater. The three types of flow through a centrifugal pump are radial flow, axial flow, and mixed flow. Khalil encyclopedia of life support systems eolss 1. Centrifugal pumps can also be constructed in a manner that results in two distinct volutes, each receiving the liquid that is discharged from a 180. This research hasnt been cited in any other publications.
Pumps of this type are called double volute pumps they may also be referred to a split volute pumps. Nptel provides elearning through online web and video courses various streams. We aim to clear up the confusion in the classification of pumps. Positive displacement pumps allow liquid to flow into an open cavity trap the liquid in the pump transport liquid from the suction to discharge port mechanically force liquid out of the pump. Fluid with high momentum passes through open passages and converts its high velocity into pressure types of dynamic pumps rotary. Mod01 lec introduction to rotodynamic pumps youtube. There are different types of pumps available in the market. Centrifugal pumps rotodynamic pumps the centrifugal or rotodynamic pump produce a head and a flow by increasing the velocity of the liquid through the machine with the help of the rotating vane impeller. Fluid with high momentum passes through open passages and converts its high velocity into pressure types of dynamic pumps rotary pumps special pumps centrifugal pumps jet pump or ejector axial flow pumps electromagnetic pumps for liquid metals mixed flow pumps fluidactuated. Force fluid into or out of a chamber by changing the volume of the chamber. Pumps are in general classified as centrifugal pumps or rotodynamic pumps and positive displacement pumps. Usually used in water pipework systems and installed immediately after the pump. A rotary vane vacuum pump is an oilsealed rotary displacement pump. Fundamentals of fluid mechanics chapter 12 pumps and turbines.
The presentation will generally follow a framework of progressivelydecreasing speci. Types of pumps pumps come in a vast array of shapes and sizes and in a great range of designs. The most common check valve is the disc type horizontal or vertical. In either case liquid is displaced from the low pressure suction side to. The pumping system consists of a housing 1, an eccentrically installed rotor 2, vanes that move radially under spring.
Screw pumps are highvolume, nonclog, atmospheric head devices that can pump a variety of solids and debris in raw waste water without screening. So, what do you mean by positivedisplacement pumps. Introduction evaporation is the removal of solvent as vapor from a solution, slurry or suspension. The designed pump delivers 100 ls flow rate against a head of 24 m. So screw pumps can pump viscous media with different inclusions without damaging structure of the medium, and can successfully be used in foodprocessing industry for pumping of jams and pastes with. Centrifugal pumps are the most common type of pump used to move liquids through a piping system. Sliding vane pumps operate quite differently from gear and lobe types.
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