Plant 2 of OPTC collaborates with its suppliers and Academia Sinica to examine the operation of the cooling pump at the processing area and determine actual needs. The plant recalibrated the flowmeters based on the analysis, and noticed that the total cooling water flow is higher than the system design. This is an opportunity for energy reduction. The plant conducted hydraulic and energy analysis to accomplish this goal, and decided to switch to high-efficiency pumps. Three cooling pumps were added and variable-frequency drive for motors was installed to regulate pump operation. The improvement reduced 124 kWh of power consumption per hour, 990 MWh per year, and saves NT$2.48 million in costs.