best way to increase water pressure

[blainegrfl08]

I need to increase my water pressure to a water generator, i have a elevation of 265ft, a run of 2100ft. a 2" line flows down hill to nozzle of 1/4" hitting a water turbine. i have 75psi now and i need 140psi. without getting move elevation is there a way to increase my nozzle pressure?

 

[vsynth]

1) use a bigger pipe, could be expensive for that length of run though.
2) increase the size of the nozzle.
3) use a pump.

 

[doitall]

265 feet should give you approximately 112 psi.

The only way to increase that is with a pump or raising the water level.

 

[doitall]

1) use a bigger pipe, could be expensive for that length of run though.
2) increase the size of the nozzle.
3) use a pump.

1 & 2 wouldn't work.

 

[blainegrfl08]

1) use a bigger pipe, could be expensive for that length of run though.
2) increase the size of the nozzle.
3) use a pump.

1 & 2 wouldn't work.

i cannot get a pump to my water source. do you think increasing pipe size at beginning and then reducing size at bottom will increase pressure?
i am considering another line and then another nozzle at the impellor?

 

[joe-90]

I would have thought the only way was decrease the nozzle size and use a pump but that would probably use the power generated by the turbine in the first place.

 

[doitall]

Increacing the size of the pipe will increase the volume of water not the pressure.

I would have thought 112 psi (8bar) would be more than enough

 

[crazycanuck]

Only way I know is to build a large resivoir at turbine end , then have small outlet to turbine .
Head of water close to turbine with large surface area plus weight of water will make pressure.

 

[doitall]

Only way I know is to build a large resivoir at turbine end , then have small outlet to turbine .
Head of water close to turbine with large surface area plus weight of water will make pressure.

No it won't

If your talking about large flow then fine increase the pipe size, however if you are talking pressure, the height of the storage tank dictates that, for every 39 ft in height you get 14.2 psi

 

[crazycanuck]

True but such a long length of 2" hose creates a lot of drag in the hose so he really only has a 1" flow, now reduce it at source and he only has a trickle of starting pressure.
He has to shorten distance from source to turbine.

 

[doitall]

You probably know more what is needed than me, so are we looking for flow rate or pressure.

The current set-up should give him give or take a squirt or two 8bar (112psi ish) that would make an impressive jet of water in anyones book.

Assuming he's making some sort of hydro-electric plant he shouldn't need anything like that pressure.

 

[Space cat]

Use heavy water!

Seriously, the only way to increase the pressure is to raise the height of the reservoir. Pressure = height x density x g. You can get your viscous losses down with bigger pipe but you'll never get past that limit.

Since this is a turbine, increasing the nozzle size, and hence the flow rate, should have the same effect as the pressure increase that you can't get. The force on the turbine blades is proportional to mass flow times velocity. More pressure would increase the velocity from the nozzle but a bigger nozzle will give you more mass flow.