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What is the minimum number of stages that a steady state thermodynamic heat engine or heat pump can have?
If it only has 2 stages it really isn't an engine. It is possible to describe a heat engine/heat pump with 3 stages, but calculating the changes in thermodynamic properties, work, and heat in each stage can be difficult with only 3 stages. It is also extremely difficult to build an actual pump or engine that only uses 3 stages - you always seem to wind up with one that really has 4 stages with one of them being a very short stage between 2 of the 3 you meant to have. For all practical purposes, you will have at least 4 stages in a heat engine or heat pump.
What is the difference between a positive and non-positive displacement pump?
Non-positive displacement has slippage inside the pump and it is a continous, variable flow. But positive displacement has no slippage inside the pump, and it is a constant flow.
Which reverses the normal flow of thermal energy?
heat pump
How do you find the maximum and average velocities in the pipe as well as the volume flow rate?
Pump flow. You should know what is the hydraulic pump. Dubai is defined. Amount of fluid inthe hydraulic diameter of the pipe passes.
Does a pump develop flow or pressure?
the pump develops pressure to have the ability to make a flow of a gas or fluid take place through a vessel, pipework or valve system, as long as there is an open end to the pipe system or vessel allowing distribution of fluid to an outlet or a return pipe back to the pump body.
What is mixed flow pump?
Preethi Mixer
What is the difference in working between axial flow pumps and mixed flow pumps?
In axial flow pumps, fluid enters and exits along the same direction parallel to the rotating shaft giving high flow rates and low head. In radial flow pumps, fluid enters and leaves perpendicular to the rotating shaft giving high head and low flow rates. Thus, in mixed we have combined of both axial and radial.i.e.Liquid will go behind the impeller at certain angle between 0-90degrees normally below 45degree.Mixed flow replace axial when we require head not provided by the axial pump as we have to lift water from a water a lower level and then discharge it. physically,mixed flow can be identified by bellmouth(diverging converging shape) which shows its between axial and radial. BILAL BIN NASIR
What is difference between axial piston pumps and vane pumps?
An axial piston pump is a positive displacement pump that has a number of pistons in a circular array within a cylinder block. It can be used as a stand-alone pump, a hydraulic motor or an automotive air conditioning compressor.A radial piston pump is a form of hydraulic pump. The working pistons extend in a radial direction symmetrically around the drive shaft, in contrast to the axial piston pump.
What causes radial thrust in a centrifugal pump?
When a centrifugal pump operates at its best efficiency point (BEP), the flow angles match with the impeller vane angles. At the BEP, the flow velocity in the volute is uniform around the volute (i.e., there is not acceleration of the fluid in the volute). Therefore, the pressure around the volute is uniform. The uniform pressure around the circumference results in a net zero radial force on the impeller (or the shaft). Note this is theoretical. In practice even at BEP, there is a small radial load because the pressure is not uniform. If the pump is operated away from the BEP, the flow velocities in the volute are non-uniform which results in a non-uniform pressure field and a net radial load (can be obtained by integrating the pressure around the circumference of the volute or the impeller).
What are the main types of hydralic pumps?
Gear pumps. A vane pump. Piston pumps. Radial pump. Centrifugal pumps.
What is the disadvantages of centrifugal compressor?
A centrifugal pump cannot pump air, therefore cannot self prime, like a positive displacement pump.
Calculate pump efficiency for submersible pump?
pump eff. = (pump dynamic head x pump flow)/(pump h.p x 3960)flow=gallon per minute
Why use submersibe pump?
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. This is the main operational mechanism of radial and mixed flow pumps. The pump shaft is connected to the gas separator or the protector by a mechanical coupling at the bottom of the pump. Well fluids enter the pump through an intake screen and are lifted by the pump stages.Other parts include the radial bearings (bushings) distributed along the length of the shaft providing radial support to the pump shaft turning at high rotational speeds. An optional thrust bearing takes up part of the axial forces arising in the pump but most of those forces are absorbed by the protector's thrust bearing.
Where might you find a cam-actuated radial piston pump on a highway truck?
Fuel
What is the flow of 5 hp motar pump?
The flow of 5 hp motor pump is around 90 GPM.
What is the difference between booster pump and lifting pump?
The circ pump is used to circulate the water thru the filter. The booster pump is for running the pool sweeper.
Types of positive displacement pump?
gear pump, crescent gear pump, axial-piston pump, radial-piston pump, linear-piston pump, & vane pump Also, fuel injection pumps such as linear piston pumps and rotary piston pumps.
