Mumbai University > Mechanical Engineering > Sem8 > Refrigeration and Air Conditioning

Marks: 6M

Year: May 2012

Advantages of multistage compression are:

1) Reduced work of compression per kg of refrigerant

2) COP increases

3) Wall thickness of L.P. cylinder is reduced, since it has to withstand lower pressures. This makes compressor lighter and cheaper.

4) Heat removal during condensation is reduced hence size of condenser is reduced.

5) Volumetric efficiency of compressor increases due to reduced pressure ratio in each stage.

6) Temperature at end of compression would be less. As a result lubrication would be effective. Hence, compressor life increases.

7) Leakages past the piston are reduced

8) Operating cost is reduced

9) It gives more uniform torque, hence size of flywheel is reduced.