A method for controlling cooling balance at the end

Abstract

The invention provides a tail end cooling capacity equilibrium control method. The tail end cooling capacity equilibrium control method comprises the following steps that cooling capacity equilibrium control over all chilled water branch loops is dynamically adjusted through a fuzzy cascade control strategy; cooling capacity equilibrium control over the cold site refrigerating capacity and the tail end cold requirement is achieved through feedforward and feedback control; and step control is used for achieving coupling control between the cooling capacity equilibrium control and the cooling capacity balanced control, and energy-saving control over a chilled water system is achieved. According to the tail end cooling capacity equilibrium control method, fuzzy cascade closed-loop control is adopted for achieving cooling capacity equilibrium control overall all loops at the tail end of a chilled water system; on the basis of tail end equilibrium, the tail end total cooling capacity requirement is analyzed by collecting chilled water relevant data, communication with an air conditioner main machine is achieved, the cooling capacity of the air conditioner main machine is calculated by collecting air conditioner main machine relevant data, and the refrigerating performance of the tail end equipment and energy-saving running of the system are guaranteed.

Description

technical field [0001] The invention relates to a control method of a central air conditioner, in particular to a method for controlling balance of cooling capacity at an end. Background technique [0002] With the development of modern science and technology and the improvement of people's living standards, central air-conditioning is widely used, providing a comfortable environment for people's work and life, but also bringing more power consumption and greenhouse gas emissions. The energy consumption of central air-conditioning accounts for 40% to 60% of the energy consumption of the entire building. The chilled water system is an important part of the central air-conditioning system, and the energy consumption of the chilled water system accounts for 10% to 15% of the energy consumption of the entire central air-conditioning system. The operation of the chilled water system not only directly consumes a large amount of electric energy but also directly affects the termin...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the common problems of hydraulic imbalance and uneven energy distribution in the actual operation of the central air-conditioning chilled water system, the constant temperature difference or constant pressure difference variable flow control strategy commonly used in engineering cannot coordinate the energy saving of the chilled water system Contradictions with the comfort of terminal air conditioning

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