Experimental study on micro-pump turbine test bed and pump performance under working conditions

Abstract

In order to explore the actual performance of a micro-pump turbine under pump conditions, this paper builds a micro-pumped storage test platform based on micro-mixed-flow pump turbine, and then conducts energy characteristics tests in pump conditions and hump region on this basis. The final determination of the hump area range of 10.6 m3/h∼18.2 m3/h; When the flow rate is 52 m3/h, the pump turbine efficiency reaches the maximum 81.91%, and the head is 16.683 m. In the test, it is found that when the unit runs to the hump area, the noise and vibration of the flow parts are generated, and the output power and efficiency curves show nonlinear growth of abnormal speed. In this paper, by setting up a test bench and conducting real machine tests, the pump operation of the micro-pump turbine is explored, and the hump phenomenon found in the test is further tested, which provides data support and improvement ideas for the next application and optimization design of the micro-pumped storage power station.