In this study, three different centrifugal compressor diffuser
scenarios were compared in terms of energy consumption and
greenhouse gas savings in an example case of supporting the aeration
process in a waste water treatment plant. The results clearly
indicate that improvements in the compressor energy efficiency
have a significant effect on the total energy use in the aeration process.
In the presented example process, the energy savings ranged
between 2.5% and 4.9% in the annual energy use. Although representing
only the energy saving potential in a system-specific case,
the targeted example illustrates a very typical end-use process for
centrifugal compressors.