Pump Selection
Pumps
Selection, Operation & Maintenance
Dr. M.F. Khalil
Professor Mech. Eng. Dept. Alexandria University
Alex.Eng.Society Short Course By MFKhalil 1
Pumps
Function Classification Construction, Theory , Operation & Applications
Alex.Eng.Society Short Course By MFKhalil 2
Pump
Pump is a mechanical device which • converts mechanical energy of its driving unit ( electric motor, diesel engine, steam turbine ,gas turbine ,wind turbine.. Etc.) to hydraulic energy .This hydraulic energy increases the energy of the pumped liquid and enabled it to overcome the static head and hydraulic losses in piping in which the pump is interposed.
Alex.Eng.Society Short Course By MFKhalil 3
Hst Hm Hss
Hmd
Hsd
Hms
Pump in piping system
Alex.Eng.Society Short Course By MFKhalil 4
•Total static head Hst = the vertical distance between the water surface level of the suction and discharge tanks. •Static discharge head Hsd = the vertical distance from the pump centerline up to The water surface level in the discharge tank. •Static suction head Hss (+ve) Applies when the supply tank is above the pump. It isThe vertical distance from the pump centerline up to the water surface level in the suction tank.. •Static suction lift Hss (-ve) Applies when the supply tank is below the pump. It is the vertical distance from the pump centerline down to the water surface level Alex.Eng.Society Short Course By
MFKhalil 5
•Velocity head v2 /2g = the kinetic energy of liquid in pipe. • Head loss hls =The head needed to overcome the head loss due to pipe friction & fittings. •Manometric delivery head Hmd = static delivery head +head loss in delivery pipe. pipe •Manometric suction head Hms =the static suction head -the velocity head ( in The suction pipe) –head loss in the suction pipe. •Total Manometric head Hm = the difference between the Manometric delivery head and the Manometric suctionBy head. Alex.Eng.Society Short Course
MFKhalil 6
Total Static Head:
Selection, Operation & Maintenance
Dr. M.F. Khalil
Professor Mech. Eng. Dept. Alexandria University
Alex.Eng.Society Short Course By MFKhalil 1
Pumps
Function Classification Construction, Theory , Operation & Applications
Alex.Eng.Society Short Course By MFKhalil 2
Pump
Pump is a mechanical device which • converts mechanical energy of its driving unit ( electric motor, diesel engine, steam turbine ,gas turbine ,wind turbine.. Etc.) to hydraulic energy .This hydraulic energy increases the energy of the pumped liquid and enabled it to overcome the static head and hydraulic losses in piping in which the pump is interposed.
Alex.Eng.Society Short Course By MFKhalil 3
Hst Hm Hss
Hmd
Hsd
Hms
Pump in piping system
Alex.Eng.Society Short Course By MFKhalil 4
•Total static head Hst = the vertical distance between the water surface level of the suction and discharge tanks. •Static discharge head Hsd = the vertical distance from the pump centerline up to The water surface level in the discharge tank. •Static suction head Hss (+ve) Applies when the supply tank is above the pump. It isThe vertical distance from the pump centerline up to the water surface level in the suction tank.. •Static suction lift Hss (-ve) Applies when the supply tank is below the pump. It is the vertical distance from the pump centerline down to the water surface level Alex.Eng.Society Short Course By
MFKhalil 5
•Velocity head v2 /2g = the kinetic energy of liquid in pipe. • Head loss hls =The head needed to overcome the head loss due to pipe friction & fittings. •Manometric delivery head Hmd = static delivery head +head loss in delivery pipe. pipe •Manometric suction head Hms =the static suction head -the velocity head ( in The suction pipe) –head loss in the suction pipe. •Total Manometric head Hm = the difference between the Manometric delivery head and the Manometric suctionBy head. Alex.Eng.Society Short Course
MFKhalil 6
Total Static Head: