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raj
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Fluid Mechanics in Overhead Water Tank

07/27/2009 1:51 AM

hi, in the overhead water tank with the help of T joint at the bottom of the tank-one end is connected to tank,another to the supply line and from 3rd end there is a pipeline which is in vertically upward vented to atmosphere.could you tell me why this venting is provided?And from the solar heated water tank the length of this vertical pipe is very high,could you explain me why??

thanks in advance....
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Pathfinder Tags: fluid mechanics
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user-deleted-1105
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#1

Re: in overhead water tank!!!-fluid mechanics

07/27/2009 2:29 AM

Probably just to allow for expansion or pump pressure.

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raj
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#9
In reply to #1

Re: in overhead water tank!!!-fluid mechanics

07/28/2009 2:21 AM

hello sir,sorry i could not understand what you r trying to say.Expansion of what?why about pump pressuer?
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user-deleted-1105
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#10
In reply to #9

Re: in overhead water tank!!!-fluid mechanics

07/28/2009 2:31 AM

Water expands with heat.
If it is a solar hot water system it may well have a circulation pump... (mine does)
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rakesh_semwal
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#2

Re: in overhead water tank!!!-fluid mechanics

07/27/2009 3:23 AM

I think at the beginning of pipe line if all the outlets are closed and drain valve is opened, The trapped air in pipe will not let the water to go in. This vertical pipe work like an air breather and offer an easy exit for air.
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user-deleted-1105
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#3
In reply to #2

Re: in overhead water tank!!!-fluid mechanics

07/27/2009 3:27 AM

...I was going to say that too....
Between us I think we have covered everything except maybe it's there to facilitate the escape of trapped snakes?
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rakesh_semwal
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#4
In reply to #3

Re: in overhead water tank!!!-fluid mechanics

07/27/2009 3:40 AM

lol
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gsuhas
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#7
In reply to #3

Re: in overhead water tank!!!-fluid mechanics

07/27/2009 11:10 PM

If air vent is big enough, may be cat also will enter in.
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bhrescobar
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#5

Re: Fluid Mechanics in Overhead Water Tank

07/27/2009 5:30 PM

From my side, I bet on thermal expansion and vapor condensation. ... snakes would not be able to go out from that long pipe up...

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gsuhas
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#6

Re: Fluid Mechanics in Overhead Water Tank

07/27/2009 11:08 PM

Can you pease put the schematic drawing for clear understanding?
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raj
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#8
In reply to #6

Re: Fluid Mechanics in Overhead Water Tank

07/28/2009 2:19 AM

hi,the arrangement is as like Mr.rakesh_semwal put in his reply
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Prayman
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#11

Re: Fluid Mechanics in Overhead Water Tank

07/28/2009 11:13 AM

I agree with the comments; Breather, expansion and also as a guage for inlet pressure and if there is a graduated glass on one side of this vertical tube, this could indicate water level, when in steady flow.
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graysurpa
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#12

Re: Fluid Mechanics in Overhead Water Tank

07/29/2009 3:45 AM

Vertical pipe is intended for pressure relief purpose. Since it is a solar heated water tank, water expands and contract due thermal changes. pressure increases due to increase in temperature and pressure decreases when temperature decreases. In this case pressure is release when the tank temperature increases.

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bhrescobar (1); graysurpa (1); gsuhas (2); Prayman (1); raj (2); rakesh_semwal (2); user-deleted-1105 (3)

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