ENERGY EFFICIENCY INVESTIGATION OF A DRY DOCK DEWATTERING PUMPS ADJUSTABLE ELECTRIC DRIVE ON PHYSICAL MODEL

Abstract

Based on the Arduino Due platform and electric pump U4814, a physical model has been de- veloped to study the energy efficiency of the dry dock pumping station. It allowed to obtain the optimal con- trol law for the supply voltage of the electric pump while maintaining its constancy and among piecewise linear time functions due to the numerical solution of the boundary value problem. A comparative analysis of competing managements confirmed the feasibility of using an adjustable electric drive. If, with a constant supply voltage, an optimal transient is performed, when the set liquid level is reached at the specified time with minimal energy consumption, the optimal piece-linear diagram of the pump motor supply voltage varia- tion at the same time of the transient process provides a gain in the amount of energy consumed above 10% . Mathematical optimal operation modes modeling of the real dock pumping station main pumps predicts a lower saving value than the value obtained on the physical model, which is due to the use on the model of an electropump with a relatively small nominal The power of a long steady-state operating mode.