0
$\begingroup$

When lifting water to a high height like a water tower, I see where water pumps have an efficiency curve, that drops off fast. Could building a reservoir at the height of the curve, and then installing a second pump to finish the lift save electricity? Could bubbles improve the efficiency curve or save electricity by inserting a vortex jet into the pipe?

$\endgroup$

closed as off-topic by ZeroTheHero, Kyle Kanos, Jon Custer, user191954, Qmechanic Sep 22 '18 at 14:35

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "This question appears to be about engineering, which is the application of scientific knowledge to construct a solution to solve a specific problem. As such, it is off topic for this site, which deals with the science, whether theoretical or experimental, of how the natural world works. For more information, see this meta post." – ZeroTheHero, Kyle Kanos, Jon Custer, Community, Qmechanic
If this question can be reworded to fit the rules in the help center, please edit the question.

1
$\begingroup$

You can absolutely get more efficiency from doing this properly.

There are many ways to run pumps in series to get a better efficiency than if you used a single pump with one curve. I found a pretty good article on this page.

You can match the curves to use less horsepower to get the same head pressure and flow rate.

The main downside is the increased equipment costs of buying and maintaining multiple pumps. You would also have to make sure that the final pump can operate with the maximum head pressure in your system.

As far as inserting a vortex into the pump; I don't think this is often a good solution. Generally you want to avoid having any air in the system. For this reason, pump designs have to be wary about suction pressures to avoid forming air bubbles on the propellers (called cavitation).

$\endgroup$

Not the answer you're looking for? Browse other questions tagged or ask your own question.