Relationship between air displacement and gas production of screw air compressor

The displacement and gas production of screw air compressor are two related but different concepts, which play an important role in the performance evaluation of screw air compressor. The following is a detailed explanation of the two concepts and their relationship:

ventilation:

definition: The displacement of the screw air compressor usually refers to the volume of air discharged from the compressor per unit time.

Influencing factors: The displacement is affected by many factors, including screw diameter, effective screw length, screw speed, and temperature and humidity in the compression chamber.

Calculation formula: The calculation formula of the theoretical displacement is Vt = (& pi;/4) ×d² ×L×n, where d is the screw diameter, L is the effective length of the screw, and n is the screw speed. The actual displacement will also be affected by the actual displacement coefficient.

Gas production:

definition: Gas production refers to the amount of compressed air produced by the screw air compressor per unit time, usually calculated by the mass or volume per unit time.

Influencing factors: In addition to the displacement, the gas production is also affected by the mechanical efficiency and volumetric efficiency of the compressor. The mechanical efficiency reflects the performance of the mechanical drive system, while the volumetric efficiency takes into account losses such as backflow of air during compression.

Calculation formula: The calculation formula of gas production usually takes into account factors such as the exhaust volume, speed, mechanical efficiency and volumetric efficiency of the host. For example, gas production = (main engine exhaust volume x rotational speed x mechanical efficiency x volumetric efficiency) / 60.

displacement and gas production of the relationship:

displacement is the basis of gas production: gas production is based on the displacement, further considering the mechanical and volumetric efficiency and other factors. Therefore, the size of the displacement directly affects the gas production.

Efficiency factors: Although a large displacement volume may mean that more air is discharged, the gas production is also affected by mechanical and volumetric efficiency. If the efficiency is low, the gas production may not be ideal even if the displacement is large.

Considerations in practical application: When selecting a screw air compressor, in addition to considering the displacement, it is also necessary to comprehensively consider its mechanical efficiency, volumetric efficiency and other performance indicators to ensure satisfactory gas production.

In summary, the displacement and gas production of the screw air compressor are interrelated, but they are affected by different factors. When evaluating the performance of the screw air compressor, these two indicators and related efficiency factors should be considered comprehensively.