Don’t Let System Components Kill Air Compressor Efficiency
How to minimize cycling, pressure differentials and unloaded run time
By Ron Marshall from Plant Services Magazine
A commonly recommended energy strategy for a lubricant-injected rotary screw air compressor is to add main storage receiver capacity to enable the switch from inefficient modulation control to the more efficient load/unload mode. A typical guideline was to add 1-2 gal of storage receiver volume for every cfm of main compressor capacity.
While this amount of storage is better than nothing, this rule represents old thinking that was used for large reciprocating compressors and might be draining your pocketbook. And even when systems have greater volumes of storage, it’s common to discover this measure hasn’t produced the expected results. Further, the cause might not be what you expect.