How much energy is saved by variable frequency air compressor than power frequency air compressor

Compared with the power frequency air compressor, the variable frequency air compressor has significant advantages in energy saving. Specifically, the frequency conversion air compressor can save about 20% to 40% of the electric energy compared to the power frequency air compressor. This energy saving effect is mainly due to the adaptive adjustment ability of the variable frequency air compressor when the load changes.

energy saving reason analysis:

1. load regulation capacity:

   • the variable frequency air compressor controls the motor speed through the frequency converter, and can automatically adjust the motor speed according to the actual gas demand to realize the precise control of the compressed air. When the load is low, the variable frequency air compressor can reduce the speed and reduce energy consumption; and when the load is high, it can quickly increase the speed to meet production needs.

2. Reduce unnecessary energy consumption:

   • when the power frequency air compressor is running, no matter how the load changes, its motor will run at a constant speed. This results in a low load, the air compressor will still produce a lot of useless work, resulting in a waste of energy. The variable frequency air compressor can adjust the motor speed according to the actual load situation to avoid unnecessary energy consumption.

3. Avoid energy loss during unloading:

   • the operation mode of standard screw air compressor is divided into two states: loading and unloading. During the unloading operation, the motor is running normally, but the air compressor has no high-pressure air output, and the power consumption is about 35% of that at the time of loading. The variable speed technology of the variable frequency air compressor minimizes the energy consumption of the compressor by avoiding the energy loss during unloading.

Actual Case:

taking a 75kW air compressor as an example, when idling, the variable frequency air compressor can save about 13.8kWh of electric energy per hour compared with the power frequency air compressor (assuming that the power frequency air compressor consumes 75kWh per hour when idling and the variable frequency air compressor consumes about 60kWh per hour when idling). According to the calculation of idling for 3000 hours per year, about 414000 kWh of electric energy can be saved in a year, and about 414000 yuan of electricity can be saved in a year based on the industrial electricity cost of 1.00 yuan per kilowatt-hour.

Summary:

compared with the power frequency air compressor, the variable frequency air compressor has significant advantages in energy saving. Through the adaptive adjustment ability, the variable frequency air compressor can adjust the motor speed in real time according to the actual demand, avoid unnecessary energy consumption, and save a lot of electric energy. In practical applications, companies can choose the appropriate variable frequency air compressor model and power according to their own needs to achieve the best energy-saving effect.