1.1. Positive Displacement Compressors

Try these first

1. 1.

   What is a positive displacement compressor?

   Hint

   Think about how they handle refrigerant.

2. 2.

   Name a type of reciprocating compressor.

   Hint

   Recall the compressor types discussed.

3. 3.

   Which type of compressor uses a piston-cylinder mechanism?

   • Rotary
   • Centrifugal
   • Reciprocating

   Hint

   Recall the different mechanisms we discussed.

4. 4.

   True or False: Rotary compressors are more complex and have more moving parts than reciprocating compressors.

   • True
   • False

   Hint

   Think about the design and complexity of each type.

5. 5.

   An HVAC engineer must choose between a reciprocating and a rotary compressor. What factors should influence their decision, and why?

   Hint

   Consider the environments where these compressors thrive.

6. 6.

   Calculate the pressure ratio achieved by a reciprocating compressor that extracts vapor from a system at 5 psi and discharges it at 25 psi. Is this within typical limits for reciprocating compressors?

   Hint

   Think about how pressure ratios relate to compressor performance.