Simple vapour compression system

Complete description about vapor compression system with t-s and schematic diagram, advantages and disadvantages processes in vcr system.

1. Simple Vapour Compression Cycle Prepared by Kaushal Patel

2. Simple Vapour Compression System The simple v apour compression is most popular and widely used in refrigeration and air condition for both domestics and industrial application. It is generally used for all purpose for small domestic refrigerator to a big industrial air conditioning plant.

3. A vapour compression refrigeration system is an improved type of refrigeration system in which a suitable working substance, termed of refrigerant is used. It condensed and evaporates at temperature and pressure close to the atmospheric condition. This refrigerant is usually used for ammonia,carbon dioxide and sulphur dioxide.

4. VCR Cycle Advantages It is less smaller size for given capacity of refrigeration. It has less running cost. The coefficient of performance is quite high.

5. VCR Cycle Disadvantage The initial cost is high. The prevention of leakage of refrigerant is the major problem in VCR.

6. VCR Cycle Components Most common refrigeration cycle in use today. There are four principal control volumes involving these components: Evaporator Compressor Condenser Expansion valve All energy transfers by work and heat are taken as positive in the directions of the arrows on the schematic and energy balances are written accordingly.

7. Two-phase liquid-vapor mixture Schematic Diagram of VCR Cycle

8. Processes of VCR Cycle Process 4-1 : Two-phase liquid-vapor mixture of refrigerant is evaporated through heat transfer from the refrigerated space. Process 1-2 : Vapor refrigerant is compressed to a relatively high temperature and pressure requiring work input. Process 2-3 : Vapor refrigerant condenses to liquid through heat transfer to the cooler surroundings. Process 3-4 : Liquid refrigerant expands to the evaporator pressure.

9. T-s Diagram When Vapour is Dry And Saturated After Compression

10. T-s Diagram of When Vapour is Super Heated After Compression

11. T-s Diagram When Vapour is Wet After Compression

12. C.O.P of VCR System  

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