Unvented cylinder in house with low water pressure

[WDIK]

I never knew that

 

[doitall]

We Discussed him last year as well Balski.

So which bit don't you agree with.

 

[ChrisR]

If you add an accumulator, the dynamic pressure AND flow go up.

If you want to split hairs it depends where exactly you measure the pressure.
If it's 2 bar in the road it'll still be 2 bar in the road.
If all the flow's going into a bucket and you dip your pressure gauge in the bucket it'll (still) say zero.

Is that what dia means by "the pressure stays the same"???????

If you measure the pressure behind the showerhead ( you ought to try it some time ..........) you'll find it's HIGHER with an acc fitted - until the acc depletes.

Does anyone really need a picture???

 

[simond]

Apology, Doitall?

 

[doitall]

Apology, Doitall?

The pressure will not be higher than the mains.

If the standing pressure is 2bar, then that is the maximum available.

 

[simond]

Sounds like the penny has dropped.......


Be a big man and tell us about the dynamic pressure and how wrong you were.

It's late, no one will be watching. Go on, say it.

 

[doitall]

If you measure the pressure behind the showerhead ( you ought to try it some time ..........) you'll find it's HIGHER with an acc fitted - until the acc depletes.

A smaller rose or jets will do the same

 

[doitall]

Sounds like the penny has dropped.......


Be a big man and tell us about the dynamic pressure and how wrong you were.

It's late, no one will be watching. Go on, say it.

Oh all right.

An accumulator will not boost the pressure

 

[doitall]

If an accumulator boost the pressure, therefore in increases the head.

If I increase the head, I can install an accumulator to an storage tank and feed a shower higher than the water level.

 

[WDIK]

Apology, Doitall?

Apology, Doitall?

The pressure will not be higher than the mains.

If the standing pressure is 2bar, then that is the maximum available.

come on guys you are both bigger than this

hey Smon has said sorry, accept it John what purpose is served by perpetuatiion?

be excellent to one another

 

[doitall]

You read it wrong WDIK

 

[Agile]

The same flowrate ??.
If the dynamic pressure has risen to 1 bar then why has the flowrate not increased also ?.
What would be the point of fitting an accumulator if the flowrate remains the same ?.
Seems pointless to me.

The difference is that the tap can be closed to enable a higher dynamic presure with the same flow rate.

We are not considering a kitchen tap here.

We are considering a shower head which needs about 1 Bar dynamic pressure to give a good high velocity jet to provide an invigorating and a flow rate of about 10 li/min.

We are not just thinking of a kitchen tap where 6 li/min is usually adequate.

Of course an accumulator will give a greater flow rate for filling a bath if thats whats needed. The average 1 Bar dynamic pressure will dump 30 li/min into a bath with a 1 Bar dynamic if thats whats needed.

Of course an accumulator does not boost pressure above the maximum mains pressure during the recharging period. Thats not its purpose!

But it will boost the dynamic pressure and the flow rate above what the mains can provide ( for a limited time and to about a 1/3 of the accumulator's capacity ).

Tony

 

[Agile]

If you measure the pressure behind the showerhead ( you ought to try it some time ..........) you'll find it's HIGHER with an acc fitted - until the acc depletes.

A smaller rose or jets will do the same

Yes, it will do but at the expense of a very low flow rate!

Hardly enough to wash the soap off!

Tony

 

[WDIK]

You read it wrong WDIK

cool

 

[Agile]

Isn't it time that Mad Mod 10 locked this thread?

If it goes on much longer it will look like those with Dr Drivell's postings.