Capacity control of a centrifugal...

Capacity control of a centrifugal...

Question 1 of 2921866636eee28f7522a1c51e5d6

Capacity control of a centrifugal refrigeration compressor can be accomplished by what means?

Question 1 of 29218

Q

Capacity control of a centrifugal refrigeration compressor can be accomplished by what means?

🔍 Key Concepts

• Centrifugal refrigeration compressor basic operation (dynamic compressor, not positive displacement) • Common capacity control methods: speed control, inlet guide/prerotation vanes, hot gas or discharge gas bypass • Think about which methods actually change load vs. just waste energy

💭 Think About

• For each option, ask: does this method change how much refrigerant mass flow the compressor actually handles, or does it just redirect flow? • Which of these methods are realistically used in industrial or large HVAC centrifugal chillers you’ve seen in diagrams or manuals? • Is there any option that would be incompatible with centrifugal compressor design, as opposed to reciprocating or screw compressors?

✅ Before You Answer

• Identify which methods affect refrigerant mass flow through the impeller (not just system pressure). • Recall if inlet guide vanes/prerotation vanes are a standard feature on centrifugal chillers for part‑load control. • Check whether a discharge bypass in centrifugal systems is considered a true capacity control or more of a stabilization/anti‑surge or hot‑gas bypass technique.