RE: Surge Tank

From: <Erik>
Date: Mon Dec 06 2004 - 09:48:00 EST

What are the boundery conditions ?
Is there a receiver at a height over 33ft above the level of the tank from which the water is drawn?
Is there a valve a the end of the pipeline who closes to prevent the tank from draining back when the pump is off?

A surge tank prevents a fluid column separation and rejoining.

When air enters the pipe and the pump is restarted, the column of water will be accelerated into a partial empty pipe. Given a long anough void, the column of water can accelerate to its terminal velocity of perhaps 5 to 10 fps before striking the valve face.
Upon collision with the valve, the kinetic energy of motion is converted into potential energy by compressing the liquid.

There should always be water in the surgetank.

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Van: Omid Hamlehdar [mailto:omid_7_ae@yahoo.com] Verzonden: maandag 6 december 2004 11:51 Aan: <a href="/group/PipingDesign/post?postID=jPL_78C97-PN_fZdYWEmA-3xyWBvjW0nJ-QblS3g_8BtqMqDPjsQPe1qIw1dOwKxaE3a-srbhwc9_45_-Za3tyfm">PipingDesign@yahoogroups.com</a> Onderwerp: [PipingDesign] Surge Tank

Hi everybody

I have a question and will be pleasure to have your opinion.

After analysis a pipe line for water transfer purpose, I found that I have extreme down surge, to suppress this surge I assumed a one way surge tank, my question:

1. Is it ok if air will enter in pipe line after water has finished in one way surge tank?
2. In terms of restarting (priming) the line, if air has entered to system, is there any consideration required regarding probable impact regarding column separation in line?

Your contribution is highly appreciated

Omid

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[Non-text portions of this message have been removed] Received on Mon Dec 06 09:48:00 2004