Dynamic load tracking central air conditioner cold source global optimum energy-saving control method

Abstract

A dynamic load tracking central air conditioner cold source global optimum energy-saving control method relates to the technical field of air conditioning. The method aims at achieving the effect of saving operation energy consumption of the central air conditioner. The method includes first building a water chilling unit model, a water pump model and a speed changing cooling tower model of the central air conditioner, collecting working condition samples of the central air conditioner, estimating model coefficients of each model according to the collected working condition samples, building a system optimizing model of the central air conditioner according to the water chilling unit model, the water pump model and the speed changing cooling tower model, utilizing the system optimizing model to calculate the theoretical working conditions of water chilling units, water pumps and cooling tower fans in the operation process of the central air conditioner and adjusting the water chilling units, the water pumps and the cooling tower fans according to a calculation result. The method is suitable for being matched with a central air conditioner system in use.

Description

technical field [0001] The invention relates to air-conditioning technology, in particular to a technology of a global optimal energy-saving control method for central air-conditioning cold sources with dynamic load tracking. Background technique [0002] At present, the energy consumption of air-conditioning in summer is rising sharply. The surge of air-conditioning power consumption has caused the power grid to be tight. A large amount of electricity is consumed by air-conditioning in industrial and civil buildings, especially the energy consumption of central air-conditioning systems in large buildings is quite high. The design capacity of central air-conditioning is calculated according to the maximum load, and most buildings only have dozens of days in a year when the central air-conditioning is at the maximum load state, and the central air-conditioning cooling load is always in dynamic changes, such as day and night, different temperatures, climate Changes, environmen...

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Problems solved by technology

[0004] The traditional central air-conditioning system operates in the mode of constant flow, or the mode of constant flow on the cold source side and variable flow on the load side. The load required by the system is based on the maximum load, the worst weather conditions and the worst working environment. In actual operation, the load required by the system is below 50% most of the time, and when the load changes, the operating parameters of the traditional central air-conditioning system cannot be adjusted synchronously at all. In addition to ground loading and unloading, there are almost no other control methods, so the traditional central air-conditioning system has a huge waste of energy

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