Types Of Pumps And Their Working Principles Pdf
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Generally Pumps classification done on the basis of its mechanical configuration and their working principle.
Different Types of Pumps: Working and Their Applications
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Ashok Kashyap. Show More. No Downloads. Views Total views. Actions Shares. No notes for slide. Pumps and types of pumps in detail 1. Design of system through which fluid will flow 2.
Calculation of losses that will occur when the fluid flows 3. Fixed volume cavity opens2. Fluid trapped in the cavity through an inlet3. Cavity closes, fluid squeezed through an outlet4. A direct force is applied to the confined liquid5. Flow rate is related to the speed of the moving parts of the pump6. The fluid flow rates are controlled by the drive speed of the pump7. In each cycle the fluid pumped equals the volume of the cavity8.
Pulsating or Periodic flow9. Allows transport of highly viscous fluids Performance almost independent of fluid viscosity Sturdy construction is required 2. Pressure-relief valves are required avoid damage from complete shutoff conditions 4. Add somehow momentum to the fluid through vanes, impellers or some special design2. Do not have a fixed closed volume3. A very simple machine Illustration Two main parts 1.
Outward fluid enters an increasing area region. Centrifugal Pumps: Working Principal1. Whatever discussed earlier is qualitative due to assumptions. The presentation of performance data is exactly same for 1. Centrifugal pumps 2.
Axial flow pumps 3. Mixed flow pumps 4. Typical Characteristic Curves of Centrifugal Pumps Head drops to zero at Qmax4. Having same casing size but different impeller diameters2. Rotating at different rpm3.
For power requirement and efficiency one needs to interpolate Impeller recirculations, important at low flow rates2. Frictional losses3. Shock losses due to mismatch of blade angle and flow inlet important at high flow rates These characteristic curves, valid only for the liquid reported 3.
A centrifugal pump will always develop the same head in feet of that liquid regardless of the fluid density 4. However P will change. Brake HP will vary directly with the liquid density2. Viscous liquids tend to increase the pump BHP If the pump isinstalled at an altitude of ft and is pumping cold water at 60oF,what is the maximum suction lift it can attain? D diameter 2. Effect of Re, almost constant4. In real life, however:-manufacturers use the same case for different rotors violating geometrical similarity -larger pumps have smaller ratios of roughness and clearances-the fluid viscosity is the same, while Re changes with diameters.
Changing the fluid2. Changing the speed3. Higher Reynolds Number 2. Lower roughness ratios 3. Whatshould be a the pump size and speed and b brake horsepower,assuming operation at best efficiency? Concept of Specific Speed-1 Speed-The type of applications for which centrifugal pumps are required are;1.
High head low flow rate2. Moderate head and moderate flow rate3. Low head and high flow rateQ. Would a general design of the centrifugal pump will do all the three jobs? What should be the design features to accomplish the three specified jobs? Answer to this question lies in the basic concept of centrifugal pump working principle.
Vanes are used to impart momentum to the fluid by applying the centrifugal force to the fluid. Concept of Specific Speed-2 Speed More the diameter of the vane more will be the centrifugal force4. More will be the diameter more will be the radial component of velocity and lesser will be the axial component5. More will be the radial velocity more will be the head developed6. Hence to get more head you need longer vanes and vice versa7. These simple physics principles lead us to the variation in impeller design to accomplish the three jobs mentioned Ns refers only to BEP 2.
Directly related to most efficientRigorous form, dimensionless pump design 3. Ns leads to specific pump applications 6. Low Ns means high head pump Lazy but common form, 7. Revisit of Confusing Example-1 Example- Dimensionless performance curves for a typical axial- flow pump. Constructed from data for a in pump at rpm. Static head due to elevation2. The head due to velocity head, the fictional head loss3. If K changes system curve shifts
Introduction to Pumps
There are different types of pumps available in the market. This article will assist you to know the main functionalities of each type of pump. The type of pump, as well as selection, mainly depend on our requirement. The application mainly includes the type of fluid you desire to pump, the distance you desire to move the fluid, and the quantity you require to get over a particular time frame. However, it is complicated to recognize accurately what kind of pump you must select.
Pump is a machine or mechanical equipment which is required to lift liquid from low level to high level or to flow liquid from low pressure area to high pressure area or as a booster in a piping network system. Principally, pump converts mechanical energy of motor into fluid flow energy. Pump also can be used in process operations that requires a high hydraulic pressure. Due to low pressure at suction side of pump, fluid will lift from certain depth, whereas due to high pressure at discharge side of pump, it will push fluid to lift until reach desired height. Pumps may be classified on the basis of the applications they serve, the materials from which they are constructed, the liquids they handle, and even their orientation in space.
Centrifugal Pumps are the most popular and commonly used type of pump for the transfer of fluids. In simple words, it is a pump that uses a rotating impeller to move water or other fluids by using centrifugal force. Centrifugal Pumps are useful since they can generally handle large quantities of fluids, provide very high flow rates which may vary with the changes in the Total Dynamic Head TDH of the particular piping system and have the ability to adjust their flow rates over a wide range. More viscous liquids such as 10 or 20 wt. For viscous liquids of more than 30 wt. Let us understand in detail, how a Centrifugal pump works. Centrifugal pumps are used to induce flow or raise a liquid from a low level to a high level.
The pump casing is specially designed to constrict the fluid from the pump inlet, direct it into the impeller and then slow and control the fluid before discharge. The impeller is the key component of a centrifugal pump. It consists of a series of curved vanes.
My Enquiry List: 0 items View list. Enquiry List. There are two main families of pumps; positive displacement and centrifugal rotodynamic , both of which have their uses and best areas of application. It is important however to be able to identify when each pump type should be selected, which ultimately comes down to their working principle and the application at hand.
Click Here To Download Now. A ship consists of various types of fluids moving inside different machinery and systems for the purpose of cooling, heating, lubrication, and as fuels. These liquids are circulated by different types of pumps, which can be independently driven by ship power supply or attached to the machinery itself.
A pump is a device that moves fluids liquids or gases , or sometimes slurries , by mechanical action, typically converted from electrical energy into hydraulic energy. Pumps can be classified into three major groups according to the method they use to move the fluid: direct lift , displacement , and gravity pumps. Pumps operate by some mechanism typically reciprocating or rotary , and consume energy to perform mechanical work moving the fluid.
- Хейл вздохнул и повернулся к своему компьютеру. В этом вся ее сущность. Блестящий криптограф - и давнишнее разочарование Хейла. Он часто представлял, как занимается с ней сексом: прижимает ее к овальной поверхности ТРАНСТЕКСТА и берет прямо там, на теплом кафеле черного пола.
Хейл лично знаком с Танкадо. И снова постаралась держаться с подчеркнутым безразличием. - Он поздравил меня с обнаружением черного хода в Попрыгунчике, - продолжал Хейл. - И назвал это победой в борьбе за личные права граждан всего мира. Ты должна признать, Сьюзан, что этот черный ход был придуман для того, чтобы ввести мир в заблуждение и преспокойно читать электронную почту.
У нас только две рыжеволосые… Две рыжеволосые, Иммакулада и Росио… Росио… Росио… Беккер остановился как вкопанный. А еще считаюсь лингвистом. Он не мог понять, как до него не дошло .
Это его первый выстрел в публичном месте. Смит был прав. Между деревьев в левой части кадра что-то сверкнуло, и в то же мгновение Танкадо схватился за грудь и потерял равновесие.