Justification of dependence of the sprinkler machine power supply system efficiency on the irrigation process parameters

The article considers the problem of choosing the power supply system of the sprinkler machine. The energy supply system can be represented by different types of the drive of the chassis of the machine: hydraulic, electrical and mechanical. Not only types of drives, but also whole systems in terms of an indicator - coefficient of performance (COP) are compared. The COP of the energy supply system takes into account the parameters of the irrigation process: the pressure of irrigation water at the entrance to the sprinkler machine (SM), the remoteness of the reservoir from the fixed support of the SM, the remoteness of the SM from the village. During the analysis, the dependencies of the COP of the hydraulic and electrical (powered from the cable line) systems on the parameters of the irrigation process were established. The conditions for ensuring the action of SM on a hydraulic drive are determined. It was found that the COP of the hydraulic system has a higher efficiency of up to 14.8% at a pressure created by the pump of more than 0.65 MPa with a distance of SM from the pumping station of not more than 4 km. In other conditions of irrigation, the efficiency of the electrical system is slightly higher - from 1.43% to 40.54%. For a reasonable choice of the energy supply system, other parameters should be taken into account, for example, the cost of the energy supply system, the lifespan of the SM, and others.