the main difference between them is the way that energy is added to the fluid to be converted to pressure increase.
In dynamic pumps, energy is added to the fluid continuously through the rotary motion of the blades. These rotating blades raise the momentum of fluid and the momentum then is converted to pressure energy through diffuser in pump outlet.
In positive displacement pumps, the energy is added periodically to the fluid. the pump has reciprocating motion by pistons for example. When the fluid enters the pump through valves, the reciprocating piston begins to press the fluid resulting in going out of the pump with pressure rise.
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because they deliver a fixed quantity of the discharge irrespective of their rpm
The thrust pads will be there at the front or non drive end of the turbine side....These are usually used to limit the axial displacement of the rotor( Means to minimize the movement of rotor axially in order to maintain the axial clearance between the moving blades and the fixed blades of steam turbine rotor).....
Turndown: The allowable operating range for the centrifugal compressor between the design point and the surge line at any given speed for a fixed compressor head.
Assume a 3 phase AC Induction motor. The speed of the motor is derived by the formula N = (120/f)/P. N speed, f - frequency, P number of poles. In an induction motor P is fixed by the winding. f system frequency. Variable speed drives change the system frequency so that the speed (N) can be varied. Drive is a power electronic device through which the system frequency can be varied
Single fixed pulley
Fixed
difference between fixed and variable inputs
Direct labor which do not vary with level of production is fixed direct labor while labor vary with change in production is variable direct labor.
The difference between fixed and variable mortgages are that in a fixed mortgage, the rate can not change. In a variable mortgage, the rate changes with time.
its the colour of the fixed and the variable we define it by its power and name
The relataionship of cost between the level of production is determine the fixed or variable cost if cost change with production level then it is variable cost otherwise fixed cost.
different between variable intervals and fixed ratio
The difference between a fixed second mortgage and one with a variable rate is that fixed second mortgage has a fixed rate and is commonly thought of as safer than a mortgage with a variable rate.
The difference between fixed overhead and variable overhead is that fixed overheads are the ones that do not change regardless and variable overheads are the ones that vary depending on the number of units that it produces. An example of fixed overhead is a managers salary.
There is a huge relationship between fixed cost and variable cost. These two costs are the opposite of each other.
Variable overhead cost variance is that variance which is in variable overheads costs between the standard cost and the actual variable cost WHILE fixed overheads cost variance is variance between standard fixed overhead cost and actual fixed overhead cost.
the main differences between fixed and floater rigs