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Hey Bimr, I wish you statement regarding power pricing was true in my country. Here, industry (which i define as users with a load greater than 5MW continuous) pay the least for their energy. We have a system for industrial users called time-of-use (TOU) pricing where the price changes every...

Hi All, To expand further, this project has about 200 pump stations throughout the region so 77JQX's comments are relevant. Another option already mentioned is to remove the small town reservoir and pump into the reticulation from the main reservoir. But you still face the same issues already...

Hi All, I thank you for your thoughts. 77JQX- I really get your points regarding the different flow requirements meaning the potential for oversized pumps. Elevated storage is effectively a battery providing a 'grace period' should issues occur esp as power outages are common. Thanks again

OK, I will do that. This is a great forum and look forward to offer my advice to you guys in the future!

Hi All, I am working with a local council in an area of New Zealand that is very flat, so everything needs to pumped for reticulated water to houses. In this system, water is transferred (using pumps) from a bore and stored in a main reservoir (3,500cu m)where it is treated. From the main...

Hi All, Thanks for all your ideas and discussion. Very interesting indeed. I think I will go back and question the motor size and try to utilise an energy efficient motor.

Thanks Kllrwolf, This is where my electrical knowledge is lacking so trying to join the dots to get a better understanding. Isnt a motor rated at a certain power based on the frequency? So isnt a 90kW motor delivering 90kW at 50Hz? A VFD can increase/decrease the power accordingly by altering...

Thanks for that Artisi and TD2K I think I will take your advice and go back to them to discuss further.

Not sure if this will help with determining the most suitable pump. 860gpm = 0.054cum/s is pretty low flow and doesnt really mention on this curve. But maybe useful anywayhttp://files.engineering.com/getfile.aspx?folder=f6df47f1-37fc-4290-a139-e3a6b6bd92e7&file=IMG088.jpg

Hi there, This is my first post so hopefully you're able to answer this. A pump supplier recently specified a pump for a duty of 105 l/s and 60m Head- Abs pump power 72.5 kW, NOL Power 75.3 kW. All good. The next step is to match a motor to this pump and the closet matching they have available...