Cold water system control method and device of distributed central air conditioner

Abstract

The invention discloses a cold water system control method and device of a distributed central air conditioner. The control method is based on basic judgment to the essence of things, all tail end branch FCU controllers in the system are formed by intelligent DDC digital controllers or intelligent temperature controllers, distributed control is implemented to tail end FCUs independently, and intelligent PID controllers are arranged in the tail end FCU controllers; the feedback closed-loop automatic control technology is adopted so as to reduce uncertainty; and the actual value of the controlled temperature variable is measured and is compared with a user set value, the deviation of the actual value and the user set value is calculated to correct system responses, and the aim of controllingthe flow q of cold water flowing through a cold coiled pipe is achieved by adjusting and controlling the opening degree of a temperature control adjusting valve. On the premise of meeting the user air conditioner service quality, economic operation management is achieved, energy-saving operation benefits are acquired, meanwhile, the control system is simpler and clearer, operation is rapid and reliable, and the remarkable enegy-saving effect and the actual application meaning are achieved.

Description

technical field [0001] The invention relates to the technical field of energy-saving control of a cold water system in a centralized air conditioning system, in particular to a method and device for controlling a cold water system of a distributed centralized air conditioner. Background technique [0002] Article 5.3.2 of the current national standard GB50155-2015 "Heating Ventilation and Air Conditioning Terminology Standard" defines the air conditioning system that centrally processes, transports and distributes the working medium as a centralized air conditioning system (central air conditioning system), commonly known as central air conditioning The system has been widely used in modern civilized society, and has become one of the facilities with the largest energy consumption in modern buildings and industrial production. The development, research and innovative application of its energy-saving operation control technology and devices have been widely valued worldwide. ...

AI Technical Summary

Problems solved by technology

Therefore, the existing central air-conditioning energy-saving control technology based on the collection and control of physical parameters of cold water operation in the cooling medium system is difficult to meet the technical requirements of all end users in the system for service quality, and there is room for continuous improvement and perfection of technology

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