Method for determining optimal operational number of variable-frequency pump units and method for controlling increment or reduction of number of variable-frequency pump units

A technology for determining methods and control methods, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as low efficiency and high energy consumption

Active Publication Date: 2016-01-13
湖南集森节能环保科技有限公司
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Problems solved by technology

[0005] The present invention provides a method for determining the optimal number of variable-frequency pump sets and a method for controlling the number of pumps to be added or subtracted to solve the problem of low efficiency and high energy consumption in the prior art. question

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  • Method for determining optimal operational number of variable-frequency pump units and method for controlling increment or reduction of number of variable-frequency pump units
  • Method for determining optimal operational number of variable-frequency pump units and method for controlling increment or reduction of number of variable-frequency pump units
  • Method for determining optimal operational number of variable-frequency pump units and method for controlling increment or reduction of number of variable-frequency pump units

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[0035] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of means consistent with aspects of the invention as recited in the appended claims.

[0036] Each embodiment in this specification is described in a progressive manner, the same and similar parts of each embodiment can be referred to each other, and each embodiment focuses on the differences from other embodiments.

[0037] In this embodiment, the variable frequency pump set is a continuously variable flow system, and each pump is equipped with a frequency converter that can display the frequency ...

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Abstract

The invention provides a method for determining the optimal operational number of variable-frequency pump units. The method comprises the following steps of drawing a flow-efficiency curve chart containing different operational numbers N of the variable-frequency pump units, and obtaining a theoretical switching node AN,N+1(QN, eta N), wherein N is a continuous integer greater than or equal to 0, and when N is greater than 1, the variable-frequency pump units are parallel variable-frequency pump units; within the range of QN+/-5%QN, performing trial running on two groups of variable-frequency pump units, with the operational numbers of N and N+1 respectively by the same flow value, and obtaining a switching node when the corresponding power PN' and PN+1' is same, wherein the switching node is an actual switching node AN,N+1'(QN', eta N'); and if the total flow Q of the variable-frequency pump units in actual operation is greater than or equal to QN' and less than or equal to QN+1', the optimal operational number of the variable-frequency pump units is N+1. Correspondingly, the invention furthermore provides a method for controlling the increment or reduction of the optimal operational number of the variable-frequency pump units to solve the problems of low efficiency and high energy consumption in a method for determining the number of variable-frequency pump units and a method for controlling the increment or reduction of the number of variable-frequency pump units in the prior art.

Description

technical field [0001] The invention relates to the technical field of a method for selecting the operating number of equipment, in particular to a method for determining the optimal operating number of variable frequency pump sets and a control method for adding and subtracting the number. Background technique [0002] A pump is a machine that transports or pressurizes a liquid. It transmits the mechanical energy of the prime mover or other external energy to the liquid to increase the energy of the liquid. The pump is mainly used to transport liquids such as water, oil, acid-base liquid, emulsion, suspoemulsion and liquid metal, and can also transport liquid, gas mixture and liquid containing suspended solids. It is widely used in agriculture, mining, chemical petroleum, national defense And various fields such as electricity, at the same time, all aspects of people's daily life are also inseparable from the use of pumps. Since the parallel connection mode can improve the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 聂光方焰彭卫胡水波
Owner 湖南集森节能环保科技有限公司
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