Comprehensive weighted evaluation method of pump unit energy consumption

Abstract

Provided is a comprehensive weighted evaluation method of pump unit energy consumption, and belongs to the technical field of water conservancy projects. The method disclosed by the present invention comprises: based on a pump unit physical model test or a CFD numerical calculation result, selecting characteristic working condition data of a plumb unit, and when a lift of a plumb unit in the i working condition of the plumb unit is Hi, obtaining a value of Qi [Eta]i of the i working condition; using a pump unit group energy consumption calculation formula to deduce a single working condition energy consumption index P.E.I of pump unit energy consumption, and determining a P.E.I value of the i working condition of the pump unit; introducing days of the pump unit characteristic working condition for comprehensive weighted average, and determining weighting factors for different working conditions; and finally putting traffic, efficiency and operating days of different working conditions into a comprehensive evaluation index M.P.E calculation formula of the pump unit energy consumption, so as to obtain a comprehensive evaluation index of the pump unit energy consumption. The method disclosed by the present invention facilitates energy saving of an actual pump station, and saves energy costs of the pump station.

Description

technical field [0001] The invention belongs to the technical field of water conservancy engineering, and in particular relates to a comprehensive energy consumption evaluation technology for a pumping station operating under multiple working conditions. Background technique [0002] The average installation efficiency of large-scale irrigation and drainage pumping stations in my country is only 40% to 50%, and the average unit energy consumption reaches 7 to 8kW h / (kt m). ) The efficiency requirements of pump devices in Section 9.1.11 vary greatly. The actual operating conditions of many pump stations deviate significantly from the design conditions. The energy consumption of pump stations has become a hot issue in the field of water conservancy engineering. At present, in actual engineering, the selection of the hydraulic model of the pumping station generally only considers the efficiency of the pumping station in the design working condition. Station efficiency, choosing...

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Problems solved by technology

Under the determined head conditions of the pumping station, if the total pumping volume of the pumping station is the same, the energy consumption of the pumping station unit is the least and the efficiency of the pumping device is the highest. The energy consumption of the pumping station is the same, but the unit with a larger flow rate of the pumping station unit has a short running time, low loss rate of electromechanical equipment, high reliability, and better overall performance of the unit, so only the efficiency of the pumping station in the design working condition is selected as the hydraulic model The basis for this is somewhat unscientific. It is difficult to determine the energy consumption of the two pumping station units only by the single index of pumping station efficiency.

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