Abstract
A method for a pump-integrated estimation and control of the fluid level in open storage tanks is proposed. Automatic control with a variable speed pump can reduce the energy consumption significantly, compared to fixed speed solutions. The proposed method uses only sensors that are by default integrated into the pumping unit. The modeling and tuning effort is higher than for fixed speed solutions, however. We outline automatic procedures for process identification and controller synthesis that reduce the user workload to a minimum and therefore can be expected to increase the level of acceptance of an energy efficient automatic control solution despite the added complexity.
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