Intelligent Control Design and Implementation on Factory Area Cooling Water Supply System
The cooling water supply system in a certain factory area can only operate in manual mode,and cannot achieve the au-tomatic constant pressure water supply,it has the characteristics of high energy consumption,high equipment loss,and poor adapta-bility to flow fluctuations in the pipeline network;The programmable logic controller(PLC)program of the system is redesigned to implement the logic control of the addition and subtraction pumps and the pressure setting of the pipeline network,which achieves the constant pressure control of the pipeline network based on the frequency converter;Through the logic control and redundant configu-ration of the water pump rotation,the automatic rotation operation of water pumps is achieved;By enabling the water pumps and manually setting the pipeline pressure,the flexibility of system control is improved;By optimizing the loading conditions of water pumps and the touch screen function,the interference of equipment failures on the automatic operation of the system is eliminated.After the operation verification for 10 months,the system runs steadily,with a one-third reduction of water pumps,and the operating pressure of the pipeline network decreases by 12.8％.The number of adjustable parameters increases from 3 to 15,and the saving en-ergy of the cooling water supply pump group reaches more than 23％.
cooling water supplyintelligent controlPLC(programmable logic controller)constant pressuresaving energy
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