What does the term double entry centrifugal compressor refer to?

What does the term double entry centrifugal compressor refer to?

• A. Two inlets on top
• B. A compressor with ducts on both sides of the inlet
• C. One-stage impeller
• D. Vacuum compressor

Answer: (B)

Double-entry in a centrifugal compressor means there are two suction paths feeding air into the impeller from opposite sides. This arrangement uses ducts on both sides of the inlet, increasing the flow capability for a given impeller speed and improving inlet flow distribution. It’s about how the air enters the compressor, not the number of stages or the inlet being on a particular surface. So, the description that matches this concept is a compressor with ducts on both sides of the inlet. The other ideas don’t fit because they describe different aspects (where the inlets are located, the number of stages, or a vacuum-focused design) rather than the two-side inlet configuration.

Double-entry in a centrifugal compressor means there are two suction paths feeding air into the impeller from opposite sides. This arrangement uses ducts on both sides of the inlet, increasing the flow capability for a given impeller speed and improving inlet flow distribution. It’s about how the air enters the compressor, not the number of stages or the inlet being on a particular surface. So, the description that matches this concept is a compressor with ducts on both sides of the inlet. The other ideas don’t fit because they describe different aspects (where the inlets are located, the number of stages, or a vacuum-focused design) rather than the two-side inlet configuration.