Compressed air accounts for a significant part of total energy costs for industrial manufacturers – typically about 12% and may be as high as 40% in some facilities. This means that any compressed air energy savings that are achieved will have a big impact on a factory’s total energy consumption and CO2 emissions
As a rule of thumb for most compressors, a reduction of 1 bar in pressure (14.5 psi) could lead to a 7% saving in electricity consumption. The pressure settings of the compressor should be adjusted until the lowest pressure can be reached, and the pressure band reduced without affecting the applications.
For centralized systems utilizing multiple compressors, by using a central controller, the network can be set to run within a narrow pressure band which ensures that the compressed air network matches the precise needs. The controller can also allow manufacturers to manually or automatically create two different pressure bands to optimize energy use within different periods, drastically reducing energy costs at low-use times.
Also, lowering the system pressure reduces the impact of leaks. A 1 bar pressure reduction decreases the effect of air leaks by 13%.
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