Abstract
Centrifugal fans with high-voltage asynchronous drives consume a large proportion of the electricity at various production facilities. The majority of the fan installations, however, operate with excessive energy consumption. This can be reduced by adapting the performance of the fans to the operation needs. Selecting the most energy-efficient method requires the investigation of a mathematical model that takes all relevant site characteristics into account. The authors review a mathematical model of the centrifugal fan based on its rated aerodynamic parameters. This model is necessary to solve the optimal control problem for high-power industrial fans using the minimum power consumption criterion. Solving this problem requires a theoretical research of various fan output control methods and selecting the most energy-efficient method for the given operating conditions. This work rationalizes the modification of the known approximating functions of the aerodynamic parameters that do not account for the fan output control using the axial distributor. The authors provide an analytical description of aerodynamic parameters of a high-power fan using a power polynomial of three variables fit for the researching of fan energy efficiency under frequency control, throttling, and axial-distributor control. The article describes the model in a compact matrix form and sets forth the limitations of its applicability. The authors obtain a target function to solve the optimal control problem for fans. The maximum energy efficiency function determines the optimum mode of fan operation according to the criterion of minimum energy consumption. The function determines the range of fan speed and blade angle of the axial distributor that corresponds to the energy-efficient control range of the fan performance.
Keywords
Centrifugal fan, aerodynamic parameters, energy efficiency, output control, axial distributor.
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Vecherkin M.V., Sarvarov A.S., Samarina I.G., Romanova I.P., Bogacheva I.Yu. Modeling the Aerodynamic Parameters of Centrifugal Fans with an Axial Distributor. Elektrotekhnicheskie sistemy i kompleksy [Electrotechnical Systems and Complexes], 2022, no. 4(57), pp. 69-75. (In Russian). https://doi.org/10.18503/2311-8318-2022-4(57)-69-75