The air volume of the air compressor usually refers gas production(I. e., exhaust volume), but this parameter is related suction there is a close relationship between the two, there is an essential difference. The following is a detailed explanation:
1. Definition of gas production (exhaust)
- standard Definitions: The gas production (displacement) of the air compressor refers volume of compressed air discharged per unit time at rated discharge pressure, converted intake state(I. e. standard temperature and pressure conditions) after the gas volume.
- Unit: Usually expressed in cubic meters per minute (m & sup3;/min) or liters per second (L/s).
- core meaning: The gas production reflects the actual output of the compressed air volume of the air compressor and is a key parameter for equipment selection and use.
2. Definition of suction volume
- standard Definitions: The suction volume is an air compressor volume of air drawn in from the air inlet per unit time, Also converted to the gas volume in the intake state.
- Relationship with gas production: The suction volume is the "input" of the air compressor compression process, and the gas production is the "output". Due to energy losses during compression (e. g., mechanical friction, heat loss), gas production is usually less than suction.
3. The core reason for the difference between the two.
| Factors | effect on intake and gas production |
|---|
| compression efficiency | the higher the efficiency, the more gas production converted per unit of suction. |
| internal loss | mechanical friction, heat loss caused by part of the intake air is not converted into effective gas production. |
| pressure loss | the pressure drop from the compression chamber to the exhaust port reduces gas production. |
| Leakage | when the equipment is not sealed enough, the inhaled air may leak, reducing the effective gas production. |
4. Key conclusions in practical application
- selection basis: When selecting an air compressor, it should be based on actual gas demand(I. e. required gas production) to match the equipment, rather than simply referring to the suction volume.
- Energy Efficiency Assessment: Gas-electricity ratio (the electric energy required to produce unit gas production) is the core index to evaluate the energy efficiency of air compressors. The calculation formula is:
gas-electricity ratio = power consumption (kW · h)/gas production (m & sup3;) - leak Management: System leakage will lead to "virtual high" gas production (because part of the compressed air does not reach the use end), and the pipeline needs to be inspected and maintained regularly.
5. Example Description
assuming that the suction volume of an air compressor is 10 m & sup3;/min, but due to the compression efficiency of 85%, its gas production is only 8.5 m & sup3;/min. If there is 5% leakage in the system, the final effective gas production is only 8.075 m & sup3;/min.
Summary: The gas volume of the air compressor usually refers to the gas production, but the suction volume is the basis of the gas production. In the selection and use of equipment, it is necessary to consider the relationship between the two to ensure the efficiency and reliability of the compressed air system.
