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Power-User
Engineering Fields - Electrical Engineering - New Member

Join Date: Dec 2009
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Pressure Shaft and Surge Shaft.

11/15/2011 12:55 AM

what is the meaning of pressure shaft and surge shaft of in a hydropower plant?

sks

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Guru
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#1

Re: Pressure shaft and surge shaft.

11/15/2011 1:12 AM

Could you include some passages where these terms are used in context?

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Power-User
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#2
In reply to #1

Re: Pressure shaft and surge shaft.

11/15/2011 1:27 AM

sorry......i can not.......!! these terms i found used repetitively earlier, and could not figure out their exact meaning.

sks

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Guru
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#4
In reply to #2

Re: Pressure shaft and surge shaft.

11/15/2011 1:36 AM

Did someone use these terms all by themselves, with no accompanying statements? If the terms were used repetitively, there must be some sentences in which they were used....

For instance, "shaft" may mean a solid metal cylinder (mechanoical component), or it may mean a tube or tunnel (as in a mineshaft or penstock).

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Guru
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#7
In reply to #2

Re: Pressure shaft and surge shaft.

11/15/2011 9:58 AM

Why doesn't it surprise me you can't explain your question.

For someone that is supposed to work in a power plant you must have access to information from supervisors, or are they feed up with inane questions.

Pick up your brush and carry on sweeping.

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#3

Re: Pressure shaft and surge shaft.

11/15/2011 1:32 AM

I tried to look for the meaning of it in Google and this is what I found, A surge tank (or surge drum) is a standpipe or storage reservoir at the downstream end of a closed aqueduct or feeder pipe to absorb sudden rises of pressure as well as to quickly provide extra water during a brief drop in pressure. An open tank to which the top of a surge pipe is connected so as to avoid loss of water during a pressure surge. Hope this one helps..

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Guru
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#5
In reply to #3

Re: Pressure shaft and surge shaft.

11/15/2011 1:43 AM

Welcome to CR4! Your guess is as good as mine, when it comes to such a vague question.

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#6
In reply to #5

Re: Pressure shaft and surge shaft.

11/15/2011 3:25 AM

thanks Tornado for the warm welcome..

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Guru
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#8

Re: Pressure Shaft and Surge Shaft.

11/15/2011 2:16 PM

To complement Gwyneth's answer, specifically for hydropower...

The purpose of the surge shaft to damp surges in the headrace tunnel of the underground hydropower plant.
It dampens hammering in HRT and prevent it from bursting. It actually consist of an orifice, which helps in regulating the flow in HRT gradually.


A surge shaft is one of the components of water conductor system of a hydr Power Plant. It is not a part in Dam but Dam can be one of the components of an hydro power Plant.

If you have a very high head hydro power plant with a water conductor system or so called HRT, Pressure Shaft and a Steel Penstock then a Surge Shaft is necessary to dampen the Water Hammer pressures immediately occurring due to the Load rejection cases which are frequent and are related to fluctuations in the load demand and other deficiencies or machine faults or line faults etc. Due to water hammer pressure the flowing water into the turbines gets rejected and the water starts travelling in the form of back pressure or oscillating waves with a very high velocity or celerity. This has to be dampened or else there is a possibility of cracking of penstocks or collapse of tunnel linings etc.

Read more: http://wiki.answers.com/Q/What_is_a_surge_shaft_in_dam#ixzz1dnq2WdH1

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