A pump test reports the section pressure at a pump inlet to be 20 kPa below atmosphere.  The discharge pressure at a point 1,147 mm above the inlet is 520 kPa.  If the volume flow rate of water in the system is 58 L/min, calculate the power, in Watts, delivered by the pump to the fluid.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A pump test reports the section pressure at a pump inlet to be 20 kPa below atmosphere.  The discharge pressure at a point 1,147 mm above the inlet is 520 kPa.  If the volume flow rate of water in the system is 58 L/min, calculate the power, in Watts, delivered by the pump to the fluid.

Expert Solution
Step 1

Given Data:

  • The inlet pressure of the pump  Pi = -20 kPa.
  • The outlet pressure of the pump Pf= 520 kPa.
  • The height of discharge is h = 1147 mm.
  • The flow rate is Q = 58 L/min.

The mass flow rate can be determined as,

m˙=ρQ=1000 kg/m3×58 Lsec×1 m31000 L=58 m3/sec

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