Recent content by PaulJankel

Stanier, I downloaded EPANET software as you suggested. It might take me a while to figure out how to use it but it looks simple and intuitive. Thank you. Paul

I can summarise my specs. as: head = 350m (net head required for turbine) length of pipe = 750m (although this might be +/- 200 m depending on topography) diameter of pipe = 0.5m (internal) flow = 2 cubic m/s (required for turbine) material = welded stainless steel (to maximise the life span of...

Stanier, Thank you for your thoughts. I am aware of water hammer issues, which I believe can be solved by the control system closing valves slowly. I have found an equation to determine 'critical' time for this operation. The system will use a Pelton (impulse) turbine, which provides a physical...

Guyz, What Can I say ? Thank you all very much for this detailed information. I am now trying to digest it. Katmar, most significant is the increased flow which could generate an additional 50% energy output, above and beyond my initial minimum requirement. I will certainly check out your site...

CVG, Thank you for the clarification. Can you tell me which equation would be used? Paul

Katmar, Thank you. That's the 'hf=f(L/D)V*V/2g' one right ? (sorry cant write V squared) - what friction factor did you use ? I am now drawn to use stainless steel with welded joints for the pipe (as opposed to concrete lined). By the way. I was trying to work out the Reynolds number for this...

Wow Katmar :) Thank you. That is close to what I was gestimating. No one has designed the pipe yet. I am formulating 'what if' scenarios before I pay for a formal design. There is a wide range of turbines available, and it is really that decision which relied on the flow rate. Please please...

Thank you JStephen. The pipe will be submerged and will be full. However I will be limiting the flow as it will be used to power a turbine. I would be satisfied with a 2 cubic m / s flow. I am trying to work out the minimum river flows necessary, and whether I can carry more water volume and...

Hello, I am trying to establish the equations required to calculate the potential flow of water through an almost straight cement lined ductile iron pipe (diameter 0.5m / length 750m / head drop 350m) if i feed it from an open channel flow (i.e. a river) with flow 'x' cubic m / s. My objective...