A heat balance control method for a central heating system

Abstract

The invention discloses a heat balance control method for a central heating system. Firstly, it is judged whether the central heating system needs heat balance control, and then the heat balance control is performed; The station is equipped with a set of heat exchange station automatic control system. The centralized control center predicts the heat load for the next 24 hours, and predicts the target value Ts of the water supply temperature on the secondary side of heat exchange. The key to balance control is to correct the target value Tn of water supply temperature on the secondary side of the heat exchange station, and the controller of the heat exchange station reduces the opening degree K of the regulating valve under the new Tn. The control logic designed by this method is adjusted accordingly based on different working conditions to ensure the balanced control of heat in the central heating system, so that all end users can obtain balanced heat supply, and ultimately ensure the heat supply quality of the entire heating system.

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...

AI Technical Summary

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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