Method and controller for operating a pump system

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United States of America Patent

PATENT NO 9091259
APP PUB NO 20130108473A1
SERIAL NO

13667910

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Abstract

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A method and controller for operating pumps wherein each pump is modelled by a QH model indicating a high-efficiency region, a high-H region and a high-Q region and a rotational speed limit. A controller dynamically maintains a current set of operating pumps and controls their rotational speed (n). In steady-state operation, wherein the pumps operate in the high-efficiency region and below the rotational speed limit, all pumps of the current set are controlled together. If the pumps operate in the high-Q region or beyond the speed limit, a new pump is added to the current set, started and brought to a speed that produces flow. A balancing operation (12-3) follows the pump addition operation, wherein the speed of the pumps of the current set are adjusted for equal heads. If the pumps operate in the high-H region, a pump is removed from the current set of pumps.

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Patent Owner(s)

  • ABB TECHNOLOGY OY

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Tamminen, Jussi Lappeenranta, FI 15 83
Viholainen, Juha Espoo, FI 1 23

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