Temperature difference type flow control system of secondary heating pipe network and control method thereof

Abstract

The invention provides a temperature difference type flow control system of a secondary heating pipe network, comprising an outdoor temperature collector, a secondary return water pressure sensor, secondary supplied and return water temperature collectors, a transducer, a secondary circulating pump and a controller. The outdoor temperature collector, the secondary return water pressure sensor, the secondary supplied water temperature collector, the secondary return water temperature collector and the transducer are respectively connected with the controller; the transducer is connected with the secondary circulating pump; the controller is used for collecting various parameters such as outdoor temperature, secondary return water pressure and secondary supplied and return water temperatures, and outputting corresponding frequency-conversion regulating signals to the transducer which carries out the frequency-conversion regulating to the secondary circulating pump. The invention also provides a control method of the system. The invention has the advantages and the positive effects of: regulating the circulating pump operating parameters in real time according to the heat demand of the individual metering users and the ordinary users and the outdoor temperature, confirming the reasonable operating pressure and the operating temperature difference, and ensuring the stable system pressure and saving the electric energy consumption through regulating the circulating pump operating frequency.

Description

technical field [0001] The invention relates to a heat supply pipe network control system and method, in particular to a secondary heat supply pipe network temperature difference flow control system and a control method thereof. Background technique [0002] In the traditional secondary circulation pump control system of the heating pipe network, the selection of the secondary circulation pump is carried out according to the design load. Since the operation time to reach the design load is very short in actual operation, most of the time are operating at less than the design load. At present, because the output power of the water pump cannot be adjusted, about 70% of the time in a heating season is in an energy-wasting operating state. Especially for users with household metering, due to the different nature of users, the heat demand is also different, resulting in 95% of the time the actual load is less than the design load state, and the energy waste is very serious. At ...

AI Technical Summary

Problems solved by technology

At present, the pumps are not able to regulate the output power, so about 70% of the time in a heating season is in a wasteful operation state

Especially for users with household metering, due to the different nature of users, the heat demand is also different, resulting in 95% of the time the actual load is less than the design load state, and the energy waste is very serious

At the same time, when the user actively opens and closes the control valve for household metering, the stability of the heating system will also be threatened, and the pressure changes frequently. At this time, artificial adjustment in the system cannot meet the requirements of system changes, resulting in safety Hidden dangers

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