Heat exchange unit operation control method and system

Abstract

The invention provides a heat exchange unit operation control method and system. The method comprises the following steps that the supply water temperature and the return water temperature of the secondary side of a heat exchange unit and the return water temperature of each building or apartment are obtained; the thermal unbalance degree of each building or apartment is calculated by using the data obtained in the above step, and the minimum thermal unbalance degree value is determined; whether to adjust the set frequency of a circulating pump or not is judged according to the relationship between the minimum thermal unbalance degree value and a set threshold value; and the heat exchange unit operates according to a comparison table or a characteristic curve of the outdoor average temperature and the secondary pipe network supply and return water average temperature. The system comprises a PLC controller, the heat exchange unit, an electric control valve, a frequency converter, the circulating pump and a building or an apartment. By means of the operation control method, the purpose of saving the power consumption of the circulating pump to the maximum extent can be achieved on the premise that the heating effect and the heat consumption of the heat exchange unit are not changed, and therefore the heating operation cost can be reduced.

Description

technical field [0001] The invention relates to the technical field of energy saving of heat exchange stations, in particular to an operation control method and system of a heat exchange unit. Background technique [0002] In the heating system, due to hydraulic imbalance, there is a common thermal imbalance phenomenon of uneven cold and heat. In order to improve the heating effect and overcome the imbalance of thermal working conditions, the operation mode of "large flow and small temperature difference" is often adopted in China at present. Sometimes the operating flow of the second network far exceeds the need to overcome thermal imbalance, resulting in waste of power consumption of the circulating pump. Contents of the invention [0003] The object of the present invention is to provide a heat exchange unit operation control method and system. By using the system and the heating operation control method of the system, it can realize maximum heating without changing the...

AI Technical Summary

Problems solved by technology

In order to improve the heating effect and overcome the imbalance of thermal working conditions, the operation mode of "large flow and small temperature difference" is often adopted in China at present. Sometimes the operating flow of the second network far exceeds the need to overcome thermal imbalance, resulting in waste of power consumption of the circulating pump

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