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The article presents the methods for calculating the pressure loss of the pneumatic transport system of a cotton harvester related to the power consumption of the fan drive. Mathematical models for computer calculation are presented. Numerical studies of the influence of the pipeline diameter and the air mixture composition on the power consumption of the fan drive are presented. It was determined that with an increase in the diameter of the pipeline from 0.15 m to 0.175 m and a change in the mixture concentration  μ  = 0.228 ÷ 0.338 for a serial receiving chamber, the fan drive power decreases from 10.3 kW to 5.79 kW.

Methods for calculating the pressure loss of the air flow and energy consumed by the fan of the cotton harvester