Compressed air is an expensive source of energy. And that, even though the raw material air is available to all companies free of charge and in unlimited quantities.
The costs do not arise with the procurement of the air, but on the way to the application!
Although this fact is well known to all companies that work with compressed air, it is seldom systematically explored how high these costs really are, how they come about and how they can be reduced.
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What You Should Know About Compressed Air / Energy Efficiency Guide
DENA - German Energy Agency