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Efficient power consumption per cubic meter

Efficient power consumption per cubic meter

(OP)
I am reviewing the energy demand for a group of water pumping station (potable), the process in most of these stations is based on river intake, coagulation, filtration, storage and distribution pumping.

In most of these stations, throttling is used and the need for VFD arises with potential power factor saving. I wonder if there is a common figure for a kwh/m3 that I can use as a target? the stations metering isn't in the best condition as well!.

Any clue?

RE: Efficient power consumption per cubic meter

Power0020

No there are too many variables in these sort of installations to use a "common figure."

All i can suggest is you start work on one station and see how much difference various changes make. Use the initial condition as a benchmark. When successful roll out the changes elsewhere.

When you are refferring to the stations metering do you mean the power meters or flow metering?

Regards
Ashtree
"Any water can be made potable if you filter it through enough money"

RE: Efficient power consumption per cubic meter

Agree. Each water treatment plant is unique with different unit processes and elevation.

The big power consumption will be getting the water to the plant and pressurizing the plant effluent to distribution pressure. Water treatment plant generally do not have unit processes that consume large amounts of power with the exception of the RO processes.

RE: Efficient power consumption per cubic meter

if an existing system, the power consumption is relatively fixed due to pump selection and installation configuration. However, if undertaking a power audit, you need to review the operating point of the pumps, the overall pump condition in terms of efficiency, pipe configurations and sizing, valving and any other item of equipment likely to reduce efficiency. VFD in themselves don't always guarantee power savings.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

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