What is the power rating of a 0.5 m³/min air compressor? Analysis of the Relationship between Traffic and Power

0.5m³ /min typical power range of air compressor

for the exhaust volume0.5m³/min(I.e. 30m³/h) the shaft power of the air compressor is usually4–7.5 kWbetween, depending on the compression form, pressure level, energy efficiency level and cooling method.

Key factors affecting power

• exhaust pressure: 0.7MPa (7bar) under working conditions, the common power is about 4. 5–5.5kW; If it rises to 1. 0MPa, the power may reach 6- 7.5kW;
• compression type: the screw type is more efficient than the piston type, and the power is 10-lower under the same flow rate- 15%;
• isentropic efficiency and volumetric efficiency: the actual selection needs to be combined with the performance curve provided by the manufacturer, rather than relying only on empirical formulas;
• ambient temperature and intake conditions: high temperature or high humidity will slightly increase power consumption.

Simple power estimation method

we can refer to the empirical formula (applicable to medium and low pressure screw machine, exhaust pressure 0. 7–0.8MPa):
shaft power (kW) ≈ traffic (m³/min) × pressure ratio × 1.8~2.2
0. 5m³/min, exhaust pressure 0. 7MPa (Pressure ratio ≈ 8). Take coefficient 2.0 as an example:
0.5 × 8 × 2.0 ≈ 8kW (Conservative, usually 5- 6kW), indicating that this formula is only used for initial screening reference,the final sample data of the manufacturer shall prevail..

Selection suggestions

incompressor selectionduring the process, do not match power only based on traffic. We recommend that you confirm the synchronization:
• Whether the rated exhaust pressure matches the pipe network requirements;
• Whether frequency conversion control is equipped to cope with load fluctuation;
• Motor protection level (IP55) and insulation grade (F级) whether it meets the on-site environment;
• Whether to provide energy efficiency labels (such as china’s energy efficiency level ii or above).