Xylem Europe Gmbh

Xylem IP Management S.a R.l.

Martin Wessman

Jürgen Mökander

Lars Uby

Staffan Aldenfalk

The invention relates to a method for monitoring and controlling the operation of a pump station () comprising a tank () for storage of a liquid and at least one pump (), the pump station () further comprises an outlet conduit () connected to the pump (), the method comprising the steps of: determining the Geodetic head (Hgeo) of the pump station (), determining the pumped Flow (Q) for a given pump operation duty point, determining the consumed Power (P) for the given pump operation duty point, and determining a Normalized Specific Energy (nSE) of the pump station () based on the determined values of Geodetic head (Hgeo), pumped Flow (Q) and consumed Power (P), by means of the formula (nSE)=(P/Q)/Hgeo.

Method for monitoring and controlling the operation of a pump station

A mixer machine assembly having a drive unit with an electric motor, a drive shaft assembly connected to the electric motor, and a propeller. The propeller has a hub, a plurality of blades, and a propeller shaft from the drive shaft assembly. The control unit is operatively connected to the electric motor, and is configured for monitoring and controlling the operation of the mixer machine. The control unit monitors a drive shaft torque about a drive shaft of the drive shaft assembly. The control unit determines an average torque range based on at least one torque range, wherein each torque range is the difference between the highest and the lowest torque value detected during a predetermined angle of rotation of the propeller during operation of the mixer machine assembly. The control unit compares the determined average torque range with a predetermined torque range limit value.

Method for monitoring and controlling mixer operation

A treatment plant and method for controlling a treatment plant suitable for treatment of wastewater. The treatment plant includes a circulation channel housing liquid, a submersible flow generating machine arranged in the circulation channel and generating a liquid flow along the circulation channel, and a control unit that is operatively connected to the flow generating machine. The flow generating machine is driven in operation by the control unit. The method includes the steps of: driving the flow generating machine at a nominal speed, decreasing the rotational speed of the flow generating machine from the set nominal speed, detecting the rotational speed at which the torque of the flow generating machine is equal to a predetermined threshold, and determining the flow velocity of the liquid at the flow generating machine based on a predetermined relationship between the rotational speed of the flow generating machine and the flow velocity of the liquid.

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Solna, Sweden

Martin Wessman