Hybrid Compressor Model for Optimal Operation of CDA System

摘要

CDA(Compressed Dry Air) is an essential utility to be used in a variety of processes inrnLCD(Liquid Crystal Display) production industry. Since the demands for CDArnfluctuate largely from moment to moment, it is common to supply compressed air withrna number of small-capacity compressors rather than few large-capacity ones. In order tornmeet the varying demands, operation conditions of compressors change at every secondrnand hence the efficiency of compressors is low. To find optimal operating strategy ofrnsuch compressor network, first a hybrid modeling technique of ideal model andrnempirical model is developed to predict efficiency and power consumption of eachrncompressor in the network. Then, optimization procedure is applied to search optimalrnoperation strategy. The proposed method was applied to actual off-line data of LCDrnproduction industry and about 5% of annual power consumption was saved byrnoptimization.