A method for adjusting the variable water volume operation of an open multi-pump transmission and distribution system

Abstract

The invention discloses a variable-water-volume operation regulating method for an open multi-water-pump transmission and distribution system. The operation regulating method comprises the following steps: fitting the single-water-pump equipment performance constants, so as to obtain the single-water-pump head as well as the relation between the single-water-pump efficiency and the flow rate variation; according to a pipeline resistance expression, calculating the pipeline network impedance; drawing a single-water-pump characteristic curve, a single-water-pump efficiency curve, a multi-water-pump parallel characteristic curve, as well as a transmission and distribution system pipeline network characteristic curve; according to the determined flow rate of the transmission and distribution system, acquiring different corresponding non-designed operating points and calculating the quantity of applied water pumps by adopting a valve throttling control method and a water pump variable-speed control method respectively; calculating the water pump efficiency of the different operating points, so as to obtain the energy consumption values of the transmission and distribution system; and comparing the energy consumption values based on the different control methods, and selecting the control method with the minimum energy consumption as the operation regulating method. By adoption of the operation regulating method, the energy consumption of the transmission and distribution system is effectively lowered, the operation expense is reduced, the equipment service life is prolonged, the energy-saving and economical effects are remarkable, and the application prospect is very good.

Description

technical field [0001] The invention relates to an operation adjustment method, in particular to a variable water volume operation adjustment method for a split multi-water pump transmission and distribution system. Background technique [0002] Building energy consumption, as a major consumption terminal of the total energy consumption of the society, accounts for about 28% of the total energy consumption of the society, and the energy consumption of the heating and air-conditioning system accounts for about 50%. In order to reduce the energy consumption of the heating system, a heat pump system is used for heating in winter The number of communities is gradually increasing. With the continuous development of the urbanization process, the amount of secondary effluent water discharged by the sewage treatment plant is also increasing. Since the secondary effluent water contains a large amount of low-grade heat energy and the water volume is basically constant, the secondary w...

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Problems solved by technology

For example: in the technical content disclosed in the patent CN200810059657, it involves a circulating cooling water system transportation optimization method, through collecting, analyzing and optimizing the data of each link of the system, the type of water pump required in the system and the problems that should be corrected are determined, but there is no Analyze how to determine the operation adjustment method under non-design working conditions according to the existing equipment of the transmission and distribution system; as in the technical content disclosed in the patent CN201410728977, a method for controlling the variable speed adjustment of the water pump based on the terminal constant impedance is proposed, but the The proportional relationship between speed and power based on is only applicable to closed pipeline systems, and this proportional relationship is not satisfied in open pipeline network systems.

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