How to select the air compressor exhaust volume based on the air consumption

The core principle for selecting air compressor exhaust volume based on air consumption is to ensure that the exhaust volume is slightly greater than the actual air demand, and reserve appropriate margin to cope with fluctuations or future expansion.The specific steps are as follows:

1. Calculate actual gas demand

1. Count the total air consumption of equipment
   Summarize the rated air consumption of all gas equipment (unit: cubic meters/minute, m³/min). If the equipment parameters are unclear, you can contact the equipment supplier or refer to industry standards.
2. Consider simultaneous use factor
   According to the workshop size and production model, multiply by the simultaneous use factor (K):
   • Small workshop (1-3 pieces of equipment): K=0.7-0.8
   • Medium workshop (4-10 units of equipment): K=0.6-0.7
   • Large workshop (more than 10 units): K=0.5-0.6
     example: The total air consumption of 5 equipment is 5m³/min. Take K=0.6, and the actual demand =5×0.6=3m³/min.
3. Compensate for pipeline leaks
   There may be leaks at the pipe connections, and the margin needs to be increased by 10%-15%.
   example: The actual demand is 3m³/min, after compensation =3×1.15=3.45m³/min.
4. Reserve room for future expansion
   If you plan to add equipment or if the gas consumption fluctuates significantly, add the margin by another 10%-20%.
   example: After compensation, the demand is 3.45m³/min, and 20% margin is reserved =3.45×1.2≈4.14m³/min.

2. Match the air compressor exhaust volume

1. Select a model with a displacement slightly greater than the calculated value
   The air compressor exhaust volume needs to cover the calculated value to avoid long-term full-load operation causing failures.
   example: The calculated value is 4.14m³/min. Models with a displacement of 4.5m³/min. can be selected.
2. Multiple equipment running in parallel (suitable for large workshops)
   If a single air compressor cannot meet the demand, multiple small displacement air compressors can be used in parallel to start and stop on demand to save energy.
   example: The total demand is 8m³/min, and two 4m³/min models can be used in parallel.

3. Special scene adjustments

1. Long-distance gas supply
   If the distance between the air end and the air compressor is long, the margin needs to be increased by 20%-30% to compensate for the pipe pressure loss.
   example: The calculated value is 4.14m³/min, and the demand for long-distance gas supply =4.14×1.3≈5.38m³/min.
2. Intermittent gas use or large fluctuations
   Priority is given to frequency conversion air compressors, and the energy saving effect is significant by adjusting the speed to match the air consumption.

4. Advantages of Granklin water-lubricated screw air compressor

1. Environmental Protection and energy saving
   Using water lubrication technology, there is no lubricating oil pollution, the compression process is closer to isothermal compression, and the energy efficiency is improved by more than 20% compared with traditional models.
2. stable and reliable
   Single screw and star wheel design has fewer moving parts and less mechanical wear, making it suitable for continuous high-load operation.
3. low noise
   Symmetrically arranged star wheels improve dynamic balance, low operating vibration, and noise ≤75dB.
4. easy maintenance
   No wearing parts (such as air valves, piston rings, etc.), long maintenance cycle and convenient operation.

V. Summary

1. core formulas：
   Demand exhaust volume = total equipment air consumption × simultaneous utilization factor × (1 + leakage rate) × (1 + reserved margin)
   (Leakage rate is recommended to be 10%-15%, and reserved margin is recommended to be 10%-20%)
2. Selection suggestions：
   • Small workshop: Single air compressor, the exhaust volume covers the calculated value and reserves a margin.
   • Large workshop: Multiple small-displacement air compressors are connected in parallel and started and stopped on demand.
   • Scenes with large fluctuations: Priority frequency conversion models are energy-saving and stable.
3. Granklin’s scheme：
   Water-lubricated screw air compressors focus on environmental protection, energy conservation and stability. They are suitable for industries with high air quality requirements (such as food, medicine, electronics, etc.) and can provide enterprises with long-term and reliable compressed air solutions.