Secondary network balancing method based on computer simulation adjustment

Abstract

The invention discloses a secondary network balancing method based on computer simulation adjustment and belongs to the technical field of secondary networks of heat supply systems. According to the technical scheme, the method comprises the following steps: drawing a secondary pipe network plan of a heat supply system, determining the heat supply area of each entry branch, and establishing a secondary network system model; utilizing a hydraulic analysis system, and obtaining the flow of each pipe section and the ideal opening degree of a valve through hydraulic calculation; carrying out primary debugging of the valve, and achieving initial balance during cold state operation before heat supply; combining water return temperature of a system vertical pipe and the change of the room temperature at the heat supply initial stage to carry out heat state debugging of the valve so as to realize hydraulic balance. The method has the advantages that the balance method is used for solving the phenomenon of hydraulic imbalance of the secondary network of the heat supply system, the hydraulic working condition of the heat supply system is simulated through a computer, in combination with the valve flow characteristic curve, the opening degree of the valve is calculated, and then the hydraulic balance of the secondary network is realized according to the calculated opening degree of the valve.

Description

technical field [0001] The invention belongs to the technical field of the secondary network of the heating system, in particular to a method for balancing the secondary network based on computer simulation adjustment. Background technique [0002] At present, the energy-saving transformation of the heating system is mainly aimed at the primary pipe network, that is, the unattended transformation of the heat exchange station, and rarely involves the secondary pipe network, which leads to the extremely common phenomenon of hydraulic imbalance in the secondary pipe network. The resulting ineffective heat supply is currently the The biggest problem of excessive energy consumption is that the loss accounts for about 20% of the heat supply. At the same time, due to the imbalance of the secondary pipe network, the intelligent production system cannot fully exert the energy-saving effect. [0003] The hydraulic imbalance of the secondary network is mainly manifested in the unbalan...

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Problems solved by technology

[0002] At present, the energy-saving transformation of the heating system is mainly aimed at the primary pipe network, that is, the unattended transformation of the heat exchange station, and rarely involves the secondary pipe network, which leads to the extremely common phenomenon of hydraulic imbalance in the secondary pipe network. The resulting ineffective heat supply is currently the The biggest problem of excessive energy consumption, the loss accounts for about 20% of the heat supply

At the same time, due to the imbalance of the secondary pipe network, the intelligent production system cannot fully exert the energy-saving effect

[0003] The hydraulic imbalance of the secondary network is mainly manifested in the unbalanced flow transmission and distribution of each loop, resulting in uneven room temperature of users, high room temperature of near-end users, excessive heating, and high operating costs of enterprises; Low frequent complaints, high corporate social pressure

In order to alleviate the thermal imbalance problem of the heating system, the method of increasing the circulation flow is often adopted, that is, the heating operation mode of "large flow and small temperature difference" is adopted. Although it can alleviate the problem of insufficient heat supply for some users, it will make most users The heat supply is too large, resulting in a great waste of energy, and increasing the circulation pump flow will inevitably lead to an increase in power consumption

At the same time, due to the imbalance of the secondary pipe network, the automatic control system of the heat exchange station cannot realize automatic operation indirectly, so that the operation mode stays in the remote manual adjustment, and the energy saving benefit is not great

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