1. A presentation on “VAPOUR COMPRESSION REFRIGERATION SYSYTEM”
M.E. Thermal Engineering(021)
Mahatma Gandhi Institute of Technical Education and Research centre

2. CONTENT:- INTRODUCTION COMPONENTS OF SIMPLE VCR SYSYTEM
VAPOUR COMPRESSION CYCLE
IMPROVEMENTS IN SIMPLE SATURATION CYCLE
COMPOUND VCR SYSTEMS
MULTIPLE EVAPORATOR AND COMPRESSOR SYSTEMS

3. 1. INTRODUCTION:-
A vapour compression refrigeration system is an improved type of air refrigeration system in which a suitable working substance, termed as refrigerant, is used.
It condenses and evaporates at temperatures and pressures close to atmospheric conditions.
The refrigerants, usually used for this purpose are ammonia (NH3), carbon dioxide (CO2) and Sulphur dioxide (SO2).
The vapour compression Refrigeration system is nowadays used for all purpose refrigeration.
It is generally used for all industrial purpose from a small domestic refrigerator to a big air conditioning plant.

4. 2. COMPONENTS OF SIMPLE VCR:-

5. Advantages Disadvantages The initial cost is high.
The prevention of leakage of the refrigerant is the major problem in vapour compression system.
Advantages
It has smaller size for the given capacity of refrigeration.
It has less running cost.
It can be employed over a large range of temperatures.

6. 3. VAPOUR COMPRESSION CYCLE :-NO
NAME
T-S DIAGRAM
h-s diagram 1.
Cycle with dry saturated vapour after compression 2.
Cycle with wet vapour after compression

7. NO
NAME
T-S DIAGRAM
h-s diagram 3.
 Cycle with superheated vapour after compression 4.
Cycle with superheated vapour before compression

8. NO
NAME
T-S DIAGRAM
h-s diagram 5.
 Cycle with undercooling or subcooling of refrigerant

9. SIMPLE SATURATION CYCLE:-
4. IMPROVEMENTS IN
SIMPLE SATURATION CYCLE:- NO
NAME
T-S DIAGRAM
h-s diagram 1.
 with flash chamber 2.
With accumulator or Pre-cooler

10. NO
NAME
T-S DIAGRAM
h-s diagram 3.
 Subcooling with liquid refrigerant by vapour refrigerant 4.
Subcooling with liquid refrigerant by liquid refrigerant

11. 5. COMPOUND VCR SYSTEMS:-NO
NAME
T-S DIAGRAM
h-s diagram 1.
 With liquid intercooler 2.
With Water Intercooler & Liquid Sub-cooler

12. NO
NAME
T-S DIAGRAM
h-s diagram 3.
 With Water Intercooler, Liquid Subcooler & Liquid Flash Chamber 4.
With Water Intercooler, Liquid Subcooler & Flash Intercooler

13. NO
NAME
T-S DIAGRAM
h-s diagram 5.
 Three stage compression with water intercoolers 6.
Three stage compression with Flash chamber

14. NO
NAME
T-S DIAGRAM
h-s diagram 7.
 Three stage compression with Flash Intercooler 8.
Three stage compression with Multiple Expansion valves and Flash chamber

15. 6. MULTIPLE EVAPORATOR AND COMPRESSOR SYSTEMS:-NO
NAME
T-S DIAGRAM
h-s diagram 1.
 At same temp. With single compressor and Expansion valve 2.
At different temp. with single compressor individual expansion valves and Back pressure valve `

16. NO
NAME
T-S DIAGRAM
h-s diagram 3.
At different temp. with single compressor Multiple expansion valves and Back pressure valve 4.
At different temp. with Individual compressor Individual expansion valves

17. NO
NAME
T-S DIAGRAM
h-s diagram 5.
 At different temp. with Individual compressor Multiple expansion valves 6.
At different temp. with compound compressor Individual expansion valves

18. NO
NAME
T-S DIAGRAM
h-s diagram 7.
 At different temp. with compound compressor Individual expansion valves and Flash Intercooler 8.
At different temp. with compound compressor Multiple expansion valves and Flash Intercooler

19. Thank You !