Pressure Reduction with the Pump as turbine in drinking water pipeline
Pressure Reduction with the Pump as turbine in drinking water pipeline
(OP)
Hello,
Local drinking water supply company has problem with high pressure in the pipeline. Reservoir is located 100m above the valley so the pressure inside the pipeline at the bottom is 10 bar and it is supposed to be 4 bar. Average water flow through this main pipe is around 80 l/s. I am thinking about using pump as turbine to reduce some of this pressure, but flow is fluctuating through the day/year so some kind of pressure reducing valve has to be used so that pressure around 4 bar can be achieved in every flow condition. My question is at what elevation this pump as turbine has to be and where pressure reduction valve has to be placed (immediately behind the turbine ?). In that arrangement with pressure reducing valve how do we estimate head for power calculation (neglect pipeline loss)?
Thanks
Local drinking water supply company has problem with high pressure in the pipeline. Reservoir is located 100m above the valley so the pressure inside the pipeline at the bottom is 10 bar and it is supposed to be 4 bar. Average water flow through this main pipe is around 80 l/s. I am thinking about using pump as turbine to reduce some of this pressure, but flow is fluctuating through the day/year so some kind of pressure reducing valve has to be used so that pressure around 4 bar can be achieved in every flow condition. My question is at what elevation this pump as turbine has to be and where pressure reduction valve has to be placed (immediately behind the turbine ?). In that arrangement with pressure reducing valve how do we estimate head for power calculation (neglect pipeline loss)?
Thanks





RE: Pressure Reduction with the Pump as turbine in drinking water pipeline
If you search on this site for hydro power turbine, you'll find quite a lot of useful info. You would nerd some sort of variable resistance to be able to maintain a fixed speed and frequency but with variable power output. That's the theory anyway...
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: Pressure Reduction with the Pump as turbine in drinking water pipeline
Johnny Pellin
RE: Pressure Reduction with the Pump as turbine in drinking water pipeline
http://www.google.ae/url?sa=t&rct=j&q=&...
Independent events are seldomly independent.
RE: Pressure Reduction with the Pump as turbine in drinking water pipeline
Johnny Pellin
RE: Pressure Reduction with the Pump as turbine in drinking water pipeline
Valuable advice from a professor many years ago: First, design for graceful failure. Everything we build will eventually fail, so we must strive to avoid injuries or secondary damage when that failure occurs. Only then can practicality and economics be properly considered.
RE: Pressure Reduction with the Pump as turbine in drinking water pipeline
As a result of those companies being "absorbed" by Sulzer and Flowserve respectively, those Engineering files are most likely gone forever; they were all on paper and probably chunked.
RE: Pressure Reduction with the Pump as turbine in drinking water pipeline
Independent events are seldomly independent.
RE: Pressure Reduction with the Pump as turbine in drinking water pipeline
If we have 100m head available how can we use just 60m?