Method and device for predicting energy efficiency ratio of refrigeration main machine of central air-conditioning system

Abstract

The invention relates to a method and device for predicting the energy efficiency ratio of a refrigeration main machine of a central air-conditioning system. The method comprises the steps: S1, acquiring historical data of operating parameters of the central air-conditioning system; S2, processing the acquired historical data of the operating parameters of the central air-conditioning system to acquire effective historical data of the operating parameters, and setting cultivation parameters of a BP neural network cultivation model; S3, substituting the effective historical data of the operating parameter into the set BP neural network cultivation model to train to acquire a corresponding relational expression of the operating parameters of the central air-conditioning system and the energy efficiency ratio of the refrigeration main machine; S4, acquiring the operating parameters of the central air-conditioning system at the time T0 and substituting the operating parameters into the corresponding relation expression to obtain the energy efficiency ratio of the refrigeration main machine of the central air-conditioning system at the time T0. The energy efficiency ratio of the refrigeration main machine of the central air-conditioning system is predicted in advance, so that waste of energy consumption can be effectively avoided, the service life of the refrigeration main machine is prolonged and the indoor heat comfortability is improved.

Description

technical field [0001] The invention relates to the field of large-scale central air-conditioning in buildings, and more specifically, to a method and device for predicting the energy efficiency ratio of a refrigeration host of a central air-conditioning system. Background technique [0002] In my country, building energy consumption exceeded 1.25 billion tons of standard coal in 2014, accounting for 30% of total social energy consumption. The energy consumption of central air-conditioning accounts for 65% of the total energy consumption of buildings, and the energy consumption of air-conditioning machine rooms accounts for about 70% of the energy consumption of air-conditioning systems. It can be seen that the energy saving of building central air-conditioning system is imperative. At present, the central air-conditioning ratio (COP: Coefficient Of Performance) is a simple and intuitive parameter that can describe the energy efficiency of the central air-conditioning syste...

AI Technical Summary

Problems solved by technology

However, this method can only feed back the energy efficiency of the main unit of the central air conditioner to the user, and cannot realize the prediction of the energy efficiency of the main unit, and cannot improve the indoor air quality in time and reduce the indoor comfort.

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