By Jacques Chaurette
This e-book is meant for those who desire to know the way pump platforms paintings and particularly how centrifugal pumps are sized intimately and often meant for faculty or engineering scholars and execs. the fundamental equations for calculating pump overall head, N.P.S.H., strain head at any place within the method and others are derived from easy rules. this can be a strong total overview of the topic and an exceptional reference guide. when you've got forgotten find out how to measurement a pump this handbook will inform you near to every little thing you must recognize.
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Extra resources for Pump System Analysis and Sizing
We can determine the pressure head anywhere on the suction side of the pump by the same method. In this case, ∆HP = 0 since there is no pump within the control volume (see Figure 2-12). ∆HP = 0 and subscript 2 is replaced with subscript X in equation [2-12]. We obtain: H X = −(∆H F 1− X + ∆H EQ1− X ) + 1 2 2 (v1 − v X ) + z1 + H1 − z X 2g [2-15] The velocity vX must be the same as would occur at point X in the complete system. In chapter 3, we will use equation [2-15] to calculate the available Net Positive Suction Head of the pump.
25. 2 ft 2 • 16 THE APPLICATION OF THERMODYNAMICS TO PUMP SYSTEMS Equipment Pressure Head Difference POINT 1 TO S There is no equipment in this portion of the line. ∆HEQ1-S = 0 POINT P TO 4 The filter between point P and 4 is considered a piece of equipment. The filter manufacturer's technical data states that this filter will produce a 5 psi pressure drop at a flow rate of 500 USGPM. 31, see equation [1-5]). 5 ft POINT 4 TO 2 The control valve between point P and 4 is considered a piece of equipment.
E. pressure, velocity and elevation) of the inlet and outlet of the system must be known. It will always be possible to disconnect our system from another if the pressure head, velocity and elevation (H , v and z) at the connection point is known (more about disconnecting interconnected systems later in this chapter). Therefore, Figure 2-8 can represent all possible situations. 8 THE DETERMINATION OF TOTAL HEAD FROM THE ENERGY BALANCE We now have all the background information necessary to determine the work required of the pump and therefore the Total Head.
Pump System Analysis and Sizing by Jacques Chaurette