The study of the causes and patterns of sediment deposition at the bottom of water intake structures of pumping stations, the negative impact of sediments on the efficiency of their operation is one of the important measures taken to improve the efficiency of the water recovery system. The issues of studying the determination of the deposition rate and the trajectory of solid particles at the bottom of structures were analyzed, and the main shortcomings and shortcomings in determining the parameters of particle deposition were identified. An equation is proposed that allows determining the trajectory of solid particles deposition taking into account their concentration in the flow, the main properties (density, geometric parameters) of particles and water flow, as well as the design dimensions of the pump station’s advance chamber. The obtained calculated results based on the proposed equation were verified by the results of the study of deposits at the bottom of the advance chamber of the operating pumping station, which showed that the spread of the obtained data does not exceed 7…12 %. At the same time, the smallest particles settle at the end of the prechamber in the water suction zone. The obtained data showed the possibility of using the proposed equation to determine the trajectory of sediment particles deposition at the bottom of water intake structures of pumping stations.
It has been determined that the reduction of siltation of the front chamber is necessary because the deposited sediments seriously violate the planned hydraulic structure of the flow when water is sucked up by pumps, as a result of which their efficiency decreases. The method of calculating the pipeline system of a new device designed to significantly reduce the siltation of the front chamber of irrigation pumping stations by artificially creating turbulence in the water flow in the bottom layer of the structure is presented. This calculation methodology is based on the use of the theory of flooded water jets, which makes it possible to determine the main characteristics of the jet. The latter allows calculating the design parameters of the pipeline system. The results of experimental studies are presented to compare the calculated data with the results of experiments, as well as to determine the effectiveness of the proposed device for a significant reduction in siltation of the front chamber of irrigation pumping stations.
This article deals with the analysis and development perspectives of the use pumped storage power plants use to increase the reliability and regime controllability of electric power systems of the Republic of Uzbekistan.
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