Methodology for assessing the efficiency of water jet pumps in auxiliary systems of irrigation pumping stations

Abstract

The reliability and efficiency of irrigation pumping stations operation primarily depends on the well-coordinated operation of all systems. Drainage system should ensure that the building and territory of the pumping station are not flooded by drainage (filtration) water. At many pumping stations (especially those with long pressure lines), water jet pumps are installed as pumps for pumping out drainage water. The experience of operating such plants has revealed their undeniable advantages in comparison with conventional vane centrifugal pumps (type K and D) – sufficient reliability in operation due to the simplicity of the design, the absence of rubbing parts in the installation, the possibility of pumping contaminated liquids and the possibility of their use in the absence of power supply. But with all this, water jet pumps are extremely low-efficiency. To justify the use of jet pumps, a methodology is needed that would allow for a comprehensive consideration of all the main factors that affect their reliability, ease of operation and energy efficiency in the drainage system. On the example of the pumping station “Kiziltepa-2”, these factors were identified and the energy efficiency of water jet pumps was calculated. Various applications of jet pumps are considered, and their efficiency is evaluated.

Practice of permanent presence and equipment of Karshi main canal

“…Processing of the results of field studies was carried out based on the laws of hydromechanics. The results of studies of irrigation institutes on the largest cascades generally accepted standard methods for testing pumps, statistical processing of the results of measuring the parameters of units for their further use and application were used [3,4].…”

Elements of technical water supply system of pumping units

“…The calculation of the reliability of the operation of the described nano-conveying structures and settling tanks includes a new reliability criterion for which the turbidity of the flow at the outlet of the settling tank is taken [17,18]. The length of sediment sedimentation is determined by the equation of sedimentation dynamics: Based on analytical, full-scale, and model studies, the obtained dependencies of the transporting capacity for the modernization of the operation of the head settling tanks of the inlet channels of the PS make it possible to increase the efficiency of controlling the irrigation system operation [19][20][21][22][23].…”

Methodology for determining technical, economic and environmental performance of combined power plants

“…This task is reduced to the need to determine and evaluate power plants' technical, economic, and environmental indicators. [9,10,11].…”

“…Experimental studies of PVM were conducted on the territory of the Tashkent State Technical University (Department of "Hydropower and Hydraulics). The areas of activities of the department are the calculation of improving the efficiency of hydraulic structures [20,21,22], especially pumping stations [3,7,11,23] and hydroelectric power plants [13], as well as power plants based on renewable energy sources [1,3] and especially combined with hydropower plants [9,12]. Currently, one of the main areas of scientific research is the study of the operating modes of power plants based on renewable energy sources and the development of methods for assessing economic efficiency.…”