2026-04-17Views：
The relationship between the gas production of the same air compressor under different pressures can be explained by the following logic and principles, the core of which is to understand the dynamic balance between the exhaust pressure, volume flow, power consumption and efficiency of the air compressor:
the gas production of the air compressor (usually refers to the volume flow, such as m & sup3;/min or CFM) and the exhaust pressure are inverse relationship. Namely:
Reason:
the compression process of the air compressor follows the laws of thermodynamics. When the exhaust pressure increases, the compression ratio (exhaust pressure/intake pressure) increases, and the compressor needs to consume more energy to overcome the gas resistance, resulting in compression per unit time. The volume of gas is reduced. Conversely, when the pressure is reduced, the compression process is easier and the gas production increases.
the performance of the air compressor is usually pressure-flow curve the curve is provided by the manufacturer and reflects the actual gas production under different pressures. For example:
Curve shape:
the flow decreases gradually with increasing pressure, but the rate of decrease may vary depending on the compressor type (piston, screw, centrifugal). For example:
suppose a screw air compressor produces 10m & sup3 at 7bar;/min with a power of 75kW. If the pressure rises to 8bar:
the gas production of the same air compressor is inversely proportional to the exhaust pressure, and the increase in pressure leads to a decrease in gas production and an increase in energy consumption. In practical application, it is necessary to balance the gas production and energy consumption by optimizing the pressure setting, using frequency conversion control or gas storage tank buffer and other measures to achieve efficient operation.
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