The Hydraulic Institute and Euro-pump have jointly published a book entitled 'Variable Speed Pumping: A Guide to Successful Applications', which details seven ways to save energy
-
Design systems with lower capacity and total head requirements. Do not assume these requirements are fixed. -
Avoid allowing for an excessive margin of error in capacity and/or total head. It typically will be less expensive to add pumping capacity later if requirements increase. -
Despite the tendency to emphasize initial cost, you will save in the long run by selecting the most efficient pump type and size at the onset. -
Use SHS to avoid losses from throttle valves and bypass lines, except when the system is designed with high static heads. -
Use two or more smaller pumps, instead of one larger pump, so that excess pump capacity can be turned off. -
Use pumps operating as turbines to recover pressure energy that would otherwise be wasted. -
Maintain pumps and all system components in virtually new condition to avoid efficiency loss.
The energy efficiency of a pumping system depends on the control method used. The SHS is especially efficient when the pump is running with partial flow.
