Energy saving renovation case of factory air compressor station

There are 8 air compressors in the factory's air compressor station. The following table shows the operating status of the air compressors. The core of centralized control is to eliminate no-load operation, as no-load operation consumes 45% of the power. (Operating 24 hours per day, 300 days per year, electricity cost is 0.7 yuan per kWh).

Total wasted power is the sum of the power wasted when each unit is unloaded
185x0.02+185x0.07+185x0.005+185x0.137+220x0.14+75x0.19+185x0+185x0.168=119KW

No-load wasted power = Total wasted power x 45% no-load waste = 119KW * 0.45 = 53.6KW;

Annual wasted electricity cost = No-load wasted power x operating time x electricity price = 53.6x24x300x0.7 = 270,000 yuan/year

Energy saving effect 1: Centralized control can eliminate 80% of no-load; annual saving of 216,000 yuan.

Energy saving effect 2: Centralized control + frequency conversion; can eliminate about 100% of no-load; annual saving of about 270,000 yuan