Compared to an axial flow compressor, a centrifugal flow compressor is generally:

• A. Cheaper
• B. More expensive
• C. The same price
• D. Less reliable

Answer: (A)

Cost and complexity differences come from how the compressor is built. A centrifugal flow compressor uses a single radial impeller with a diffuser and volute, so the flow path is relatively simple and the part count is lower. This straightforward design means easier manufacturing, fewer specialized blade rows, and less precision required in assembly, all of which keep production and maintenance costs down. An axial flow compressor, by contrast, relies on many stages of precisely contoured blades and stators across a long, tightly matched flow path. That complexity drives higher manufacturing, testing, and assembly costs, especially for larger units or higher pressure rises. Because of this simpler construction and easier upkeep, a centrifugal compressor is generally cheaper than an axial flow compressor for similar duty.