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mratheesh05
Associate

Join Date: Dec 2011
Posts: 28

Parallel Operation of Motor Driven Pump with Steam Driven Pump

07/15/2012 9:07 AM

In a Expansion project , a new pump to be added with existing Pumps.

Existing Pumps: Screw Type , 1 Working( Steam Turbine driven) 1 stand by(Motor Driven)

New Pump: Screw Type Parallel working with existing pump, Motor Driven.

Qustion: A)1n 1working +1 stand by case, Motor driven is usually working and steam turbine driven is stand by. Is it possible ? ot it is a mistake in Datasheet

B)2 pumps working in parallel one with motor driven and another with Steam Turbine

Driven , is it possible?

C)A note is given in datasheet "Rate performance in existing rotary positive displacement pumps G-9002 & 9002S with turbineand motor respectively. Provide new G-9002C equivalent capacity with turbine drive."

What is the meaning of sentence "Provide new G-9002C equivalent capacity with turbine drive."
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lyn
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Join Date: Oct 2008
Posts: 42355
Good Answers: 1693
#1

Re: Parallel operation of Motor Driven Pump with Steam Driven Pump

07/15/2012 12:40 PM

You must be a student of coolyaar.
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TonyS
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Join Date: Aug 2010
Location: Resting under the Major Oak
Posts: 4347
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#2
In reply to #1

Re: Parallel operation of Motor Driven Pump with Steam Driven Pump

07/16/2012 9:44 AM

The very thought makes my blood run cold!

__________________
 The reports of my death are greatly exaggerated.
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MUKULMAHANT
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Engineering Fields - Systems Engineering - New Member Hobbies - Model Rocketry - New Member

Join Date: Dec 2006
Location: Long.92E,Lat.26N
Posts: 1336
Good Answers: 14
#3

Re: Parallel Operation of Motor Driven Pump with Steam Driven Pump

07/16/2012 10:23 AM

Answers :

A Motor Driven Normally -Steam Driven when Motor is at fault-OK

B Possible at double( Or close to) output- if Output side can take the higher flow throughput at combined higher Q-H

C Asks you TO plot your own system curve with both pumps running onto YOUR load

"----ALONGWITH turbine drive"

mm
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Kingcow Protector
Active Contributor

Join Date: Jul 2012
Posts: 10
#4

Re: Parallel Operation of Motor Driven Pump with Steam Driven Pump

07/18/2012 6:26 AM

A) It is quite possible for a turbine driven pump to be main, depending on the availability of excess steam from steam balance, or criticality of the process service or due to the unreliable elctric power supply.

B) It is quite possible without any difficulty, with proper control of ST governor.

C) It means that the new pump (G-9002C motor driven) shall be procured to match the exact verified current capacity of the turbine driven pump now under operation. (possibly to account for the loss in Volumetric efficiency of the working pump intended to work in parallel with the new motor driven pump)

Hope this helps,

King cow Protector
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sivabalan
Active Contributor

Join Date: Oct 2009
Posts: 14
#5

Re: Parallel Operation of Motor Driven Pump with Steam Driven Pump

08/06/2012 2:21 PM

A simple suggestion.. put NRV in the both pump discharge.. as u said parallel operation & expansion project it is very simple..
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Kingcow Protector (1); lyn (1); MUKULMAHANT (1); sivabalan (1); TonyS (1)

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