Overall energy saving control method of central air conditioner

Abstract

The invention discloses an overall energy saving control method a central air conditioner. The method is characterized by including: generating the behavior feature models of each equipment and the operating environment of the central air conditioner, updating the feature models, performing optimization calculation while the central air conditioner water system balance and heat and mass balance conditions are satisfied and on the basis of behavior feature predicting models, and executing optimal operating work conditions. The prediction-based overall energy saving control method of the central air conditioner has the advantages that the operation data of each equipment and the operating environment, the structure-uniformed and universal behavior feature predicting models of each equipment and the operating environment are generated and updated on the basis of the system identification technology, the behavior feature predicting models can constantly approach the actual operating features of each equipment and the operating environment in an online manner, and the equipment which is used for a long time and has performance degradation and deviation can be accurately predicted; the central air conditioner water system balance and heat and mass balance conditions are introduced into the prediction, and overall work condition optimization is achieved.

Description

technical field [0001] The invention relates to energy-saving control, in particular to an overall energy-saving control method for a central air conditioner. Background technique [0002] With the development of social economy, the proportion of building energy consumption in the total energy consumption of the whole society is getting higher and higher, reaching about 30%, and in the whole building energy consumption, the energy consumption of central air conditioning accounts for about 40%~ Therefore, fully exploiting the energy-saving space of the central air-conditioning system can not only bring huge energy-saving benefits, but also help to achieve the current increasingly difficult energy-saving and emission-reduction goals. [0003] At present, the design of the central air-conditioning system is mostly based on the design daily load, and the design daily load is basically close to the annual maximum load. Under partial load conditions, not only the equipment may ha...

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Problems solved by technology

[0003] At present, the design of the central air-conditioning system is mostly calculated according to the design daily load, and the design daily load is basically close to the maximum load of the year. Partial load conditions, not only the equipment may have unfavorable operating conditions in low load conditions, but also the energy consumption of the entire central air conditioning system will increase

[0004] Conventional central air-conditioning automatic control systems mainly control different equipment, such as chillers, water pumps, cooling towers, and air-conditioning boxes. This traditional control method cannot reflect the interaction between different devices in the system, which may lead to a substantial increase in the energy consumption of the entire air conditioning system while saving energy for a certain device

[0005] In addition, the existing prediction model-based central air-conditioning energy-saving control methods and systems have problems such as complex prediction models, lack of versatility, rough update methods, and lack of a unified control system. They all belong to local energy-saving control, and most of the prediction There is no way for the model to fully take into account system delays, equipment performance attenuation or performance deviation after long-term use

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