Cop Of Vapour Compression Cycle

Cop of vapour compression cycle Introduction :  The most common refrigeration cycle in used today.  Vapour compression refrigeration system is based on vapour compression cycle.

 Vapour compression refrigeration system is widely used method for air conditioning of buildings and automobiles. It is also used in domestic and commercial refrigerators .Large scale warehouses for child or frozen storage.

The vapour compression cycle.  These are the four principal control volumes involving these components. 1. Evaporator 2. Compressor 3. Condenser 4. Expansion valve.

Vapour compression cycle.  The processes for these cycle are.

Processes 4-1: Two phase liquid vapour mixture of refrigerant is evaporatored through heat transfer from the

refrigerated space.

Vapour compression cycle.  Process 1-2 : Vapour refrigerant is compressed to a relatively high temperature and Pressure requiring work input.

 Process 2-3 : Vapour refrigerant condenses to liquid through heat transfer to the cooler. Surroundings.

Vapour compression cycle.  Process 3-4: Liquid refrigerant expands to the evaporator pressure.

The vapour compression cycle :

The vapour compression cycle. Engineering model: 

Each component is analyzed as a control volume at stead y

.

State.

 Dry compression is presumed, the refrigerant is a vapour.  The compressor operates adiabatically.  The refrigerant expands through the valve under goes a tthrottlig

. Process.  Kinetic and potential energy changes are ignored.

Coefficient of performance (COP) It is the performance parameter of simple vapour compression cycle. If Refrigerating effect is increases or work input is decreases than performance of simple vapour compression cycle are increase.

Cop :

 This equation represents the maximum theoretical coefficient of performance of any refrigeration cycle operating between cold and hot regions at temperatures T c and T h repectivily.

Coefficient of performance of single stage vapour compression cycle.  A refrigerator used to produce refrigeration effect only.,that is, COP ref