Pumping system control
AssigneeABB AB
InventorsJussi TAMMINEN, Tero AHONEN, Jero AHOLA
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Abstract
A method and a control arrangement are disclosed to measure a total flow rate through a pump device before a pump pressure or rotational speed change; and to change at least one of: the pump pressure by a predetermined pressure step or the pump rotational speed by a predetermined rotational speed step. The arrangement can measure a total flow rate through the pump device after the pump pressure or rotational speed change; and determine a need for a further pump pressure or rotational speed change step based on total flow rate measurements carried out before and after the pump pressure change.
Claims20
A method of controlling a pump system having a pump device and at least two branches, wherein each of the branches has a flow control element, and a pump device control is provided in connection with the pump device, the method comprising:
- measuring a total flow rate through the pump device before a pump pressure or rotational speed change;
- changing at least one of:
- the pump pressure by a predetermined pressure step or the pump rotational speed by a predetermined rotational speed step;
- measuring a total flow rate through the pump device after the pump pressure or rotational speed change;
- and
- determining a need for a further pump pressure or rotational speed change step based on the total flow rate measurements carried out before and after the pump pressure or rotational speed change.
A control arrangement for a pump system having a pump device and at least two branches, wherein each branch has a flow control element, the control arrangement comprising:
- means for measuring a total flow rate through a pump device, the means for measuring the total flow rate being configured to measure the total flow rate before a pump pressure or rotational speed change and after a pump pressure or rotational speed change;
- and
- pump device control means, configured to change, by a predetermined step, at least one of pump pressure or pump rotational speed, the pump device control means being configured to determine a need for a further pump pressure or rotational speed change step based on said total flow rate measurements before and after a pump pressure or rotational speed.
Dependencies are inferred from the claim text.