Question text A water pump delivers 6 hp of shaft power when operating. The pressure differential...
Question text A water pump delivers 6 hp of shaft power when operating. The pressure differential between the outlet and the inlet of the pump is measured to be 1.2 psi when the flow rate is 10 ft3/s, and the velocity changes to 5 ft/s from 2 ft/s as the water passes through the pump. Determine the mechanical efficiency of this pump assuming the water density to be 62.4 lbm/ft3 (written in decimal form with 3 significant figures).
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Question text A water pump delivers 6 hp of shaft power when
operating. The pressure differential...
A water pump delivers 6 hp of shaft power when operating. The pressure differential between the...
A water pump delivers 6 hp of shaft power when operating. The pressure differential between the outlet and the inlet of the pump is measured to be 1.2 psi when the flow rate is 10 ft3/s, and the velocity changes to 5 ft/s from 2 ft/s as the water passes through the pump. Determine the mechanical efficiency of this pump assuming the water density to be 62.4 lbm/ft3 (written in decimal form with 3 significant figures).
A water pump delivers 6 hp of shaft power when operating. The pressure differential between the...
A water pump delivers 6 hp of shaft power when operating. The pressure differential between the outlet and the inlet of the pump is measured to be 1.2 psi when the flow rate is 15 ft3/s, and the velocity doubles from 3 ft/s as the water passes through the pump. Determine the mechanical efficiency of this Dumn
Please help, been trying to find the right answer to this for a long time now!...
Please help, been trying to find the right answer to this for a long time now! A water pump delivers 6 hp of shaft power when operating. The pressure differential between the outlet and the inlet of the pump is measured to be 1.2 psi when the flow rate is 10 ft3/s, and the velocity changes to 5 ft/s from 2 ft/s as the water passes through the pump. Determine the mechanical efficiency of this pump assuming the water density...
A water pump operating at 85% motor efficiency is used to transfer water from a lake...
A water pump operating at 85% motor efficiency is used to transfer water from a lake reservoir to a storage tank 100 ft above the lake level. The inlet to the pump is 2 inches. Thfae outlet of the pump is 2 inches. The storage tank is open to atmosphere. Useful Constants: Density of water is 624 lbm/ft. g-322 ft/s, &-32.2 Ibmt/Ibhs) Generalized 1st Law Iul2 dt dt dt ρν HINT: Must use 2 Control Volumes to solve problem Useful...
A farmer is to pump water at 70'F from a river to a water storage tank nearby using a 125-ft-long...
A farmer is to pump water at 70'F from a river to a water storage tank nearby using a 125-ft-long, 5-in-diameter plastic pipe with three flanged 90 smooth bends. The water velocity near the river surface is 6 ft/s, and the pipe inlet is placed in the river normal to the flow direction of water to take advantage of the dynamic pressure. The elevation difference between the river and the free surface of the tank is 12 ft. For a...
Question 13 5 pts An electric motor delivers 67-HP mechanical power when its shaft turns at...
Question 13 5 pts An electric motor delivers 67-HP mechanical power when its shaft turns at 2,832 RPM. What is the shaft torque in N.m? 1 HP = 746 W. Question 14 5 pts Copy of A DC motor supplied from 48 V draws 5 amps and turns at 157 rad/sec when the load torque is 1.45 N.m. What is the efficiency in percent?
6. Determine the setting of a centrifugal pump, given that flow rate = 2.4 m/min; diameter...
6. Determine the setting of a centrifugal pump, given that flow rate = 2.4 m/min; diameter of intake pipe = 160 mm; entrance losses = one velocity head in suction pipe; required NPSH = 42 kPa; water temperature = 30°C N D1, D2 : inlet and outlet diameters of impeller (rotor) b : impeller width 0,6 : inlet and outlet impeller vane angles (degrees) : speed of rotation of impeller (and its driver) in rpm V, V :tangential and radial...
A radial water pump with an exit radius of 5 in. an exit blade thickness of...
A radial water pump with an exit radius of 5 in. an exit blade thickness of 0.6 in. develops an actual pressure head of 100 ft at 500 gpm when rotating at 1750 rpm. The shaft power is measured to be 21 hp and the losses are estimated to be 1.4 hp for disk friction, 0.5 hp for bearings/seals, and 20 gpm for leakage. Determine: 3. a) Volumetric Efficiency b) Mechanical Efficiency c) Hydraulic Efficiency d) Exit blade angle
Question 6 a) Differentiate between a pump-head capacity curve and system-head capacity curve. [2 Marks] b)...
Question 6 a) Differentiate between a pump-head capacity curve and system-head capacity curve. [2 Marks] b) A pump has the characteristics listed in the Table Q6 (b) when operated at 1170 rpm. i. Develop head-capacity curves for a pump operated at 870 and 705 rpm. [4 Marks] Hence or otherwise, determine the head at 870 rpm corresponding to Q = 0.44 m3/s. [2 marks] Table Q6 (b) Capacity(m/s) Efficiency (%) 0.0 0.1 0.2 0.3 0.4 Head(m) 40.0 39.0 36.6 34.4...
A water pump delivers 6 hp of shaft power when operating. The pressure differential between the outlet and the inlet of the pump is measured to be 1.2 psi when the flow rate is 15 ft3/s, and the velocity doubles from 3 ft/s as the water passes through the pump. Determine the mechanical efficiency of this Dumn
A water pump operating at 85% motor efficiency is used to transfer water from a lake reservoir to a storage tank 100 ft above the lake level. The inlet to the pump is 2 inches. Thfae outlet of the pump is 2 inches. The storage tank is open to atmosphere. Useful Constants: Density of water is 624 lbm/ft. g-322 ft/s, &-32.2 Ibmt/Ibhs) Generalized 1st Law Iul2 dt dt dt ρν HINT: Must use 2 Control Volumes to solve problem Useful...
A farmer is to pump water at 70'F from a river to a water storage tank nearby using a 125-ft-long, 5-in-diameter plastic pipe with three flanged 90 smooth bends. The water velocity near the river surface is 6 ft/s, and the pipe inlet is placed in the river normal to the flow direction of water to take advantage of the dynamic pressure. The elevation difference between the river and the free surface of the tank is 12 ft. For a...
Question 13 5 pts An electric motor delivers 67-HP mechanical power when its shaft turns at 2,832 RPM. What is the shaft torque in N.m? 1 HP = 746 W. Question 14 5 pts Copy of A DC motor supplied from 48 V draws 5 amps and turns at 157 rad/sec when the load torque is 1.45 N.m. What is the efficiency in percent?
6. Determine the setting of a centrifugal pump, given that flow rate = 2.4 m/min; diameter of intake pipe = 160 mm; entrance losses = one velocity head in suction pipe; required NPSH = 42 kPa; water temperature = 30°C N D1, D2 : inlet and outlet diameters of impeller (rotor) b : impeller width 0,6 : inlet and outlet impeller vane angles (degrees) : speed of rotation of impeller (and its driver) in rpm V, V :tangential and radial...
A radial water pump with an exit radius of 5 in. an exit blade thickness of 0.6 in. develops an actual pressure head of 100 ft at 500 gpm when rotating at 1750 rpm. The shaft power is measured to be 21 hp and the losses are estimated to be 1.4 hp for disk friction, 0.5 hp for bearings/seals, and 20 gpm for leakage. Determine: 3. a) Volumetric Efficiency b) Mechanical Efficiency c) Hydraulic Efficiency d) Exit blade angle
Question 6 a) Differentiate between a pump-head capacity curve and system-head capacity curve. [2 Marks] b) A pump has the characteristics listed in the Table Q6 (b) when operated at 1170 rpm. i. Develop head-capacity curves for a pump operated at 870 and 705 rpm. [4 Marks] Hence or otherwise, determine the head at 870 rpm corresponding to Q = 0.44 m3/s. [2 marks] Table Q6 (b) Capacity(m/s) Efficiency (%) 0.0 0.1 0.2 0.3 0.4 Head(m) 40.0 39.0 36.6 34.4...
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