2026-04-15Views：
There is a direct relationship between the suction volume and the exhaust volume of the air compressor, but affected by many factors, the actual exhaust volume is usually less than the suction volume. The following is a detailed technical explanation:
according to the ideal gas equation of state, in adiabatic compression in the process, the relationship between the suction volume (V suction) and the exhaust volume (V row) is:
V suction = V row + & Delta;V temperature risewhere & Delta;V temperature rise is the increase in volume caused by the increase in gas temperature during compression. The greater the compression ratio (& pi;= P suction and P row), the more significant the temperature rise, and the greater the V temperature rise.
in actual operation, the following factors lead exhaust volume <suction volume:
| Compressor type | rated pressure (bar) | suction/exhaust volume | η_v |
|---|---|---|---|
| piston type | 7 | 1.15:1 | 78% |
| screw type | 7 | 1.08:1 | 85% |
| centrifugal | 3 | 1.02:1 | 92% |
Conclusion: The relationship between suction volume and exhaust volume is affected by compressor type, working conditions, design efficiency and so on. In the actual selection, it is necessary to combine the compression ratio, cooling mode, sealing performance and other parameters, select the model with high & eta;_v and less leakage to match the demand and reduce energy consumption.
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