By employing two stage screw air compressor, an intermediate cooler can be introduced between the stages. This allows the compressed gas, after the initial compression stage, to undergo isobaric cooling, reducing its temperature before entering the subsequent cylinder. Lower temperature and increased density of the two stage screw compressor facilitate further compression, resulting in significant power savings compared to single-stage compression. Consequently, the work area under two-stage compression at the same pressure is smaller than that of single-stage compression.
1.Industry Applications:
Two stage screw air compressors are vital in industries like petrochemical, automotive, and manufacturing, delivering high-pressure air for pneumatic tools, assembly lines, and quality control processes.
2.Clean Room Operations:
These two stage screw air compressors play a key role in environments requiring clean air, such as clean rooms in semiconductor manufacturing, pharmaceutical production, and electronics assembly, ensuring air quality standards are met.
3.Food and Beverage Industry:
Two stage screw compressors are utilized in food and beverage processing plants to maintain air quality during production, packaging, and storage, adhering to strict hygiene regulations.
4.Healthcare Sector:
Hospitals and healthcare facilities rely on these 2 stage screw compressors for medical air supply, powering equipment like ventilators, dental tools, and surgical instruments, where air purity is critical.
5.Laboratory Settings:
In research labs and testing facilities, two stage screw air compressors provide high-pressure air for various analytical instruments, maintaining precise conditions for accurate experiments and results.
The principle of the wholesale screw air compressor involves a natural air intake through an air filter into the first compression stage. In this stage, the incoming air mixes with a small amount of lubricating oil and is compressed to an intermediate pressure. The compressed gas by double stage screw compressor then enters a cooling channel where it comes into contact with a significant amount of oil mist, effectively reducing its temperature. After cooling, the compressed gas enters the second rotor for the second compression stage, resulting in the gas being compressed to the final discharge pressure. Finally, the compressed gas is discharged through an exhaust flange, completing the entire compression process. While various designs exist, the fundamental principles are similar.
Distinguishing Between Single-Stage and Two-Stage Air Compressors Based on Machine Structure.
A single-stage air compressor consists of a pair of rotors that make up a rotary screw compressor, achieving air compression in a single step.
A two-stage air compressor consists of two pairs of rotors. After the gas undergoes the first stage of compression, the 2 stage screw compressor enters the second stage for further compression. The compression ratio is higher, and the power is reduced compared to a single-stage compressor.
By splitting the compression process into two stages and setting inter-stage pressure using equal pressure ratios, the compression ratio of double stage screw compressor for each stage is significantly lower than that of a single-stage compressor. This results in a substantial reduction in rotor backflow leakage, leading to improved volumetric and adiabatic efficiencies, consequently increasing the final gas output.
Compared to single-stage compression, two-stage compression tends towards the most energy-efficient isothermal compression. In principle, two stage screw air compressor is 5%-8% more energy-efficient than single-stage one.
