A swarm intelligence optimization method for dynamic hydraulic balance of central air-conditioning chilled water pipe network

Abstract

The invention discloses a group intelligent optimization method for the dynamic hydraulic balance of the central air-conditioning chilled water pipe network. Intelligent computing nodes CPN are set in the air-conditioning box, bypass valve and water pump equipment in the chilled water pipe network. All the intelligent computing nodes CPN are based on actual physical Topological connections are connected to form a network communication system with a group intelligent architecture; corresponding distributed calculations are completed for adjustment tasks, and finally the dynamic hydraulic balance of the chilled water pipe network is realized with the minimum total system power; the intelligent computing node CPN of the air conditioning box is obtained through information interaction calculation The minimum supply and return water pressure difference and total flow of the system that meet the flow requirements of each air-conditioning box at the end of the system, and calculate the opening of the water valve of the air-conditioning box surface cooler; And the total flow demand, calculate the optimal operation strategy of the parallel pump system, and finally achieve the purpose of optimizing the dynamic hydraulic balance of the chilled water pipe network and saving energy and reducing consumption.

Description

technical field [0001] The invention belongs to the technical field of air-conditioning and refrigeration, and in particular relates to a group intelligence optimization method for dynamic hydraulic balance of a central air-conditioning chilled water pipe network. Background technique [0002] The energy consumption of the central air-conditioning system has always accounted for a large proportion of the building energy consumption, so it is of great significance to conduct energy-saving optimization research on the central air-conditioning system. [0003] At present, in the design process of the central air-conditioning system, the terminal load is calculated according to the maximum load of the building; when the equipment is selected, the performance parameters are also determined according to the design flow, and the designer considers the system margin. The safety factor of the equipment is artificially increased; in addition, the equipment model is discrete and change...

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Problems solved by technology

[0003] At present, in the design process of the central air-conditioning system, the terminal load is calculated according to the maximum load of the building; when the equipment is selected, the performance parameters are also determined according to the design flow, and the designer considers the system margin. The safety factor of the equipment is artificially increased; in addition, the equipment model is discrete and changes discontinuously. When the calculated performance parameters are between the two models, the designer often chooses a larger model of equipment, resulting in The selection is too large; and when the system is running, affected by changes in external factors such as weather conditions, the system is almost always working under partial load

Therefore, during the operation of the system, the user's flow demand is often less than the design flow, which makes the temperature of the end room uneven, causing the dynamic hydraulic imbalance of the system, resulting in energy waste and user comfort.

[0004] At present, the existing method basically realizes the dynamic hydraulic balance of the pipe network system through the balance valve device, but this solution will lead to an increase in the impedance of the pipe network, thereby increasing the energy consumption of the pump, and cannot fully achieve the purpose of saving energy and reducing consumption.

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