Pump head

Sanket · October 21, 2015, 10:04

Dear

I have a centrifugal pump test report
In this report data shown as bello

Capacity, Total H, Static Head, Dynamic Head,

What is static Head and Dynamic Head?

Total is 41.5, Static is 40.7 and dynamic is 0.8 meter

Please explain me, what is static head and dynamic head in this report

fluid23 · October 21, 2015, 13:41

According to Google:

Static Head: Difference between suction and discharge head.

Dynamic Head: Static Head - Friction Head

Sanket · October 22, 2015, 05:31

Dymanic head value is to small in report
How is it possible?

agd · October 22, 2015, 11:57

If I were to wager a guess, and this is only a guess, I would say that the total head is the head being generated by the pump, the static head is the actual usable pressure generated by the pump (the net head) and the dynamic head is the head loss due to friction in the pump. Then

net head = total head - dynamic head

But as I said, this is only a guess. It's been 30 years since my last class on rotary pumps

Sanket · October 30, 2015, 12:27

any body can expain more about static and dynamic head?

LuckyTran · October 30, 2015, 14:33

I would suggest getting in touch with the authors of your report to figure out their definition of total, static, and dynamic head.

Other than the very obvious 0.8 + 40.7 = 41.5 I am not able to decipher the presumed definitions.

Definitions vary considerably. For example, some manufacturers define static head as the pressure head at the inlet of the pump when the pump is not running and dynamic head as the pressure head at the same location with the pump running. Obviously the sum of these two do not mean anything, they simply describe the operational state of the pump.

October 21, 2015, 10:04	Pump head	#1
Sanket New Member Sanket Join Date: Oct 2015 Posts: 3 Rep Power: 10	Dear I have a centrifugal pump test report In this report data shown as bello Capacity, Total H, Static Head, Dynamic Head, What is static Head and Dynamic Head? Total is 41.5, Static is 40.7 and dynamic is 0.8 meter Please explain me, what is static head and dynamic head in this report

October 30, 2015, 12:27	Static And Dynamic Head	#5
Sanket New Member Sanket Join Date: Oct 2015 Posts: 3 Rep Power: 10	any body can expain more about static and dynamic head?

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October 21, 2015, 13:41		#2
fluid23 Senior Member Matt Join Date: Aug 2014 Posts: 947 Rep Power: 17	According to Google: Static Head: Difference between suction and discharge head. Dynamic Head: Static Head - Friction Head

October 22, 2015, 05:31		#3
Sanket New Member Sanket Join Date: Oct 2015 Posts: 3 Rep Power: 10	Dymanic head value is to small in report How is it possible?

October 22, 2015, 11:57		#4
agd Senior Member Join Date: Jul 2009 Posts: 354 Rep Power: 18	If I were to wager a guess, and this is only a guess, I would say that the total head is the head being generated by the pump, the static head is the actual usable pressure generated by the pump (the net head) and the dynamic head is the head loss due to friction in the pump. Then net head = total head - dynamic head But as I said, this is only a guess. It's been 30 years since my last class on rotary pumps

October 30, 2015, 14:33		#6
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,674 Rep Power: 66	I would suggest getting in touch with the authors of your report to figure out their definition of total, static, and dynamic head. Other than the very obvious 0.8 + 40.7 = 41.5 I am not able to decipher the presumed definitions. Definitions vary considerably. For example, some manufacturers define static head as the pressure head at the inlet of the pump when the pump is not running and dynamic head as the pressure head at the same location with the pump running. Obviously the sum of these two do not mean anything, they simply describe the operational state of the pump.