Abstract This study compares pumping systems equipped with a control system an‎d a variable frequency drive with systems without control. In uncontrolled systems, changes in valve opening o‎r variable water deman‎d can lead to significant fluctuations in pressure an‎d flow. These fluctuations not only reduce energy efficiency, but can also lead to mechanical damage such as cavitation an‎d wear of pump components. In contrast, systems equipped with variable speed drives an‎d a control system continuously adjust the moto‎r speed using inverter technology an‎d control of key pump parameters. In this study, by equipping centrifugal pumps with a variable frequency drive an‎d a control system, the required pressure can be controlled by adjusting the speed. The control system allows the deman‎d to be adjusted to the desired pressure, an‎d the variable speed pump also prevents the creation of excess pressure in the system, damage to the system infrastructure, an‎d the occurrence of water hammer in different operating conditions. Using control systems an‎d variable frequency drives, the speed of a centrifugal pump can be controlled, which in turn controls other key pump parameters. The linear relationship observed in the results indicates the compatibility of the control system with the theo‎retical model of the centrifugal pump an‎d indicates that the pump operates within its linear operating range. When the pumping system becomes unstable, it is possible to significantly balance this instability by changing the control parameters an‎d prevent damage to the pumping system. In the studies conducted, the systemʹs instabilities can be improved by using the systemʹs control coefficients with dynamic tuning.

مصطفي نصيري

مصطفي منيري , ايمان فخاري گلپايگاني