Nowadays, the energy consumption of air compressors is huge. In general, up to 70% of the electricity bill of a factory comes from the consumption of air compressors. Therefore, it is imperative to choose an energy-saving two-stage compression permanent magnet variable frequency screw air compressor. The annual electricity bill saved by an energy-saving air compressor can reduce a huge amount of expenditure for an enterprise. So which air compressor is more energy-saving?
1: Energy efficiency level
Taking a model with a rated power of 37kw as an example, the pressure is 0.8MPa, the rotation speed is 3660rpm, and the exhaust volume is 5.84m3/min. The input power of the permanent magnet synchronous frequency conversion model is measured to be 40.36kw, and the input specific power of the complete machine is 6.91; while the input power of the ordinary asynchronous power frequency model is measured to be 43.64, and the input specific power of the complete machine is 7.47.
According to the energy efficiency limit value and energy efficiency grade standard of the positive displacement screw air compressor, the first-level energy efficiency is the input specific power qi<7.2, and the second-level energy efficiency is the input specific power range 7.2≤qi<8.1. Therefore, it can be seen that the permanent magnet synchronous machine The model belongs to Level 1 energy efficiency, while ordinary asynchronous power frequency models can only achieve Level 2 energy efficiency. The two-stage energy-saving screw air compressor of BOSS is 10% more energy-efficient than the national first-class energy efficiency.
2: Energy saving calculation
Take the two previous models with rated power of 37kw as examples. When the load rate is only 60%, the input power of the ordinary asynchronous power frequency model is 38.2kw, while the shaft power of the permanent magnet variable frequency model is 23.6kW, saving The electricity rate reaches 37.5%.
If it is assumed that it works for 4,000 hours per year, the annual electricity cost of an ordinary asynchronous power frequency model is 107,200 yuan, and if a permanent magnet synchronous frequency conversion model is used, the annual electricity cost is 65,800 yuan. Calculated in this way, the annual electricity cost is 107,200 yuan. The electricity bill saved is 41,400 yuan.
Post time: Dec-27-2024
