Central heating distributive frequency conversion two-stage pump system energy-saving control method

Abstract

The invention relates to a central heating distributive frequency conversion two-stage pump system energy-saving control method. The method comprises the following steps: adjusting the opening of an indirect heat supply form two-stage pump running frequency and an electric three-way valve arranged in front of a direct heat supply form two-stage pump according to a secondary supply water temperature, controlling the opening and closing of the electric two-way valve according to temperature difference of the electric two-way valve and a boiler outlet on a decoupling pipe and pressure difference on the two ends of the decoupling pipe, and maintaining the normal operation of a system when the two-stage pump running frequency changes or the opening of the three-way valve changes. The central heating distributive frequency conversion two-stage pump system energy-saving control method comprises a method used for controlling the running frequency of a main circulation pump according to the rated flow of each boiler and also comprises a control method used for adjusting the running frequency of a secondary pump according to outdoor meteorological parameter in a staging manner. The control method accurately adjusts the heating load of a system, the system simultaneously reduces the power consumption of a circulating water pump according to the required heat supply, the control method can carry out real-time monitoring and adjustment on a heat supply system through wireless communication, and the district heating automation level is improved.

Description

technical field [0001] The invention relates to an energy-saving control system for central heating, in particular to an energy-saving control method for a distributed frequency conversion secondary pump system. Background technique [0002] At present, with the development of economy and society and the improvement of people's living standards, the demand for heating in winter is getting higher and higher. The rapid development of central heating business has become more and more large-scale. The corresponding increase in energy consumption and the aggravation of environmental pollution require that the central heating system must adopt refined management methods to achieve the effect of energy saving and emission reduction. For central heating systems, especially large-scale central heating systems, when designing and selecting water pumps, the calculation principle is to meet the pressure loss of the most unfavorable circulation loop of the system. For the water pump sel...

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Problems solved by technology

[0003] Utility model patent 200720169829.X "distributed frequency conversion secondary pump hot water boiler heating system" and utility model patent 200820136105.X expound the composition of the secondary pump system and its function, without involving the specific control method of the system

The control method is the essence of

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