Central heating system heat balance control method

Abstract

The invention discloses a central heating system heat balance control method. According to the central heating system heat balance control method, firstly, whether a central heating system needs heatbalance control or not is judged, and then the heat balance control is performed; the central heating system of the central heating system heat balance control method is provided with a central control center, and each heat exchange station is equipped with a set of heat exchange station automatic control system; the central control center predicts heat load in the next 24 hours and predicts one secondary side water supply temperature target value Ts of the multiple heat exchange stations; the key to the balance control is to modify one secondary side water supply temperature target value Tn of the heat exchange stations, and a heat exchange station controller reduces the opening K of an adjusting valve under the new Tn; and a control logic designed by the central heating system heat balance control method is correspondingly adjusted according to different working conditions, the central heating system heat balance control is guaranteed to make all tail end users obtain balanced heating, and finally, the heating quality of the whole heating system is guaranteed.

Description

technical field [0001] The invention relates to a heat supply balance control method, which belongs to the field of central heating, in particular to a heat balance control method of a central heating system. Background technique [0002] Heating in winter is a rigid demand in the northern region. The central heating system has become the development trend of heating in winter in the north due to its advantages of high energy utilization, low pollutant emissions, and high system safety. There are two types of central heating systems: direct heating and indirect heating. Small-scale central heating systems generally use direct heating. The system consists of four components: heat source, heating network, heating network water supply equipment, and terminal radiator. The hot water generated by the heat source is directly transported to the user's terminal radiator through the heating network. The small-scale central heating system has fewer heat users, short heat transmission...

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Problems solved by technology

When encountering extremely cold weather, the heat supply capacity of the heat source is often unable to meet the heat load demand. If the target temperature value of each heat exchange station is still adjusted independently, it will cause the heat exchange station close to the heat source due to the small resistance of the pipe network. There is a lot of heat to be "grabbed", and the heat exchange station far away from the heat source has a large resistance of the pipe network. Even if the opening of the regulating valve reaches 100%, it cannot "grab" the required heat. This phenomenon of "water grabbing" between heat exchange stations It will destroy the heat balance of the heating system, resulting in the deterioration of the heat supply quality of the heat users far away from the heat source

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