Variable air compressor than the general air compressor function and energy saving advantages, mainly have the following points:
1, the variable frequency air compressor pressure setting can be a point, that is, the minimum pressure to meet the requirements of the production equipment as the set pressure, variable frequency air compressor will be based on the trend of pipe network pressure fluctuation, adjust the speed of the air compressor speed, and even eliminate the unloading operation of the air compressor, saving energy.
2. As the compressor cannot sweep away the possibility of long-term operation under full load, the capacity of the motor can only be determined according to the maximum demand, so the planned capacity is generally too large.In practical operation, the proportion of light-load operation time is very high.If choose frequency conversion speed regulation, can greatly improve the operating efficiency.Therefore, the potential for energy conservation is great.
3, some conditioning methods (such as adjusting the valve opening and changing the Angle of the blade, etc.), even in the case of small demand, can not reduce the running power of the motor.After selecting frequency conversion speed regulation, when the demand is small, the motor speed can be reduced, reduce the motor running power, and then further complete energy saving.
4, most of the single motor drive system can not be adjusted according to the weight of the load.And after choosing frequency conversion to adjust speed, can undertake successively conditioning very conveniently, can hold to the parameter such as pressure, discharge, temperature is safe, raise the job function of compressor greatly next.
The frequency conversion series introduced by hande includes permanent magnet frequency conversion twin-screw air compressor, super permanent magnet frequency conversion twin-screw air compressor and low pressure permanent magnet frequency conversion twin-screw air compressor.The frequency conversion series have a common double-layer oil-cooled permanent magnet frequency conversion special motor, which USES a smooth system of air compressor to circularly cool the motor through the oil channel, ensuring the motor to operate at low temperature within the full frequency range and avoiding the demagnetization at high temperature of the system.With very little or no gas, the system goes into dormancy.To achieve maximum energy saving,
In the dormancy, when the practice pressure reaches the dormancy wake-up pressure, the frequency converter responds with high speed and launches immediately.Can save more than 40% of energy consumption:
Example of power saving: a 75KW general air compressor, running for 8000 hours a year, electricity fee 0.7 yuan/KWH, the annual electricity fee is 75KW*8000*0.7= 420,000 yuan
Hande permanent magnet frequency conversion air compressor, a year can save about 40% of the electricity, then 420,000 yuan *40%= 168,000 yuan
Power consumption of variable frequency air compressor.The motor speed is proportional to the power supply frequency, n = f x 120 / p (without considering the difference in the speed), for example: 2-pole motor at 50Hz is 3000 RPM;The 4-pole motor rotates at 50Hz at 1500 RPM;The 6-pole motor rotates at 760rpm at 38Hz;The 2-pole motor rotates at 25Hz at 1500 RPM (with frequency converter);4-pole motor at 100Hz rotation speed of 3000 RPM (with frequency converter);The 6-pole motor rotates at 155Hz at 3100 RPM (with frequency converter).It can be seen that, in the case of other parameters unchanged, the air compressor flow and rotor speed is proportional, and the air compressor power consumption and flow is proportional, therefore, the compressor power consumption and power frequency is proportional to change.