I, 0.5m³ /min typical power range of air compressor
0.5m³/min (I.e. 0.5 cubic meters of displacement per minute) belongs to small-sized air compressor common specifications and is widely used in laboratory, pneumatic tools, small manufacturing workshops and other scenarios. Its supporting motor power is usually3～7.5 kWdepending on the technology type:
- piston air compressor: simple structure, frequent start and stop, generally equipped with 4-5.5 kW motor;
- screw Air Compressor(Micro permanent magnet frequency conversion type): higher energy efficiency, common 3-4 kW can meet the demand of continuous gas supply;
- oil-Free scroll: suitable for clean environment with slightly higher power (about 5- 6 kW), but the operation is more quiet and stable.
II. Key factors affecting power
exhaust volume (0.5m³/min) only the volume flow is reflected, and the actual power required is restricted by the following factors:
- exhaust pressure(For example, 0. 7 MPa vs 1.0 MPa): every pressure rise is 0. 1 MPa, shaft power increases by about 8%- 12%;
- inlet temperature and altitude: high temperature or altitude will reduce the volume efficiency and require higher input power compensation;
- transmission mode and energy efficiency grade: direct connection is better than belt drive; IE3 /IE4 high-efficiency motor saves 10% of electricity compared with ordinary motor- 15%.
III. Selection suggestions: pay attention to energy efficiency matching, not just the nominal exhaust volume
when purchasing a 0.5m³ air compressor, the only standard should not be ‘air displacement standard. Should be combined with the actual gas pressure, load rate (such as intermittent vs continuous), environmental conditions, priority selectionfrequency conversion adjustmentandsmart start and stopfunction model, and check its under the target working conditionspecific power value (kW /(m³/min))— High quality small screw machine can be as low as 6. 2 kW /(m³/min), and the old piston machine may be as high as 9.5 or more.
Energy efficiency matching: power distribution of different technical routes under the same exhaust volume
Piston type
4.5 kW
Screw type
3.7 kW
Scroll
5.2 kW
0.5 m³/min exhaust volume
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