A water pump driven by an 800 W electric motor is used to pump water from the ground level to a tank at the rate of 20000 L/hour. Water is being discharged into the tank at 10 meters above the ground; this is the maximum rise this pump can achieve. The water and the ambient temperatures are both 10 °C. The inlet and outlet pipe diameters for the pump are both 8 cm, respectively. Determine: (1)/ The average inlet linear flow velocity of the water; 2) Assuming the efficiency of the electric motor is 95%, calculate the efficiency of the motor-pump unit; 3) The pressure difference between the inlet and the outlet of the pump.
A water pump driven by an 800 W electric motor is used to pump water from the ground level to a tank at the rate of 20000 L/hour. Water is being discharged into the tank at 10 meters above the ground; this is the maximum rise this pump can achieve. The water and the ambient temperatures are both 10 °C. The inlet and outlet pipe diameters for the pump are both 8 cm, respectively. Determine: (1)/ The average inlet linear flow velocity of the water; 2) Assuming the efficiency of the electric motor is 95%, calculate the efficiency of the motor-pump unit; 3) The pressure difference between the inlet and the outlet of the pump.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:Question 2
A water pump driven by an 800 W electric motor is used to pump water from the ground
level to a tank at the rate of 20000 L/hour. Water is being discharged into the tank at 10
meters above the ground; this is the maximum rise this pump can achieve. The water and
the ambient temperatures are both 10 °C. The inlet and outlet pipe diameters for the pump
are both 8 cm, respectively. Determine:
(1)/ The average inlet linear flow velocity of the water;
2) Assuming the efficiency of the electric motor is 95%, calculate the efficieney-of the
motor-pump unit;
3) The pressure difference between the inlet and the outlet of the pump.
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