Abstract: The operation mode of circulating water system of unit number 1 and unit number 2 in Huadian Baotou Power Generation Corporation Limited and related parameters of the circulating water pump, the water tower and the condenser were analyzed and researched. The motors of water circulating pumps number 4 and number 2 were reformed into high and low speed mode, and were put into operation. According to the feature of lower load in winter, the operation mode of circulating water system was optimized; based on the original ‘three pumps for two units’ operation mode, the ‘one pump for two units’ operation mode was realized successfully, and favorable economical benefit was obtained.

Key words: water circulating pump, motor, energy saving reformation, operation mode, optimization