A presentation on VAPOUR COMPRESSION REFRIGERATION SYSYTEM M

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

CONTENT: 1. INTRODUCTION 2. COMPONENTS OF SIMPLE VCR SYSYTEM 3. VAPOUR COMPRESSION CYCLE 4. IMPROVEMENTS IN SIMPLE SATURATION CYCLE 5. COMPOUND VCR SYSTEMS 6. MULTIPLE EVAPORATOR AND COMPRESSOR SYSTEMS

1. INTRODUCTION: ü A vapour compression refrigeration system is an improved type of air refrigeration system in which a suitable working substance, termed as refrigerant, is used. ü It condenses and evaporates at temperatures and pressures close to atmospheric conditions. ü The refrigerants, usually used for this purpose are ammonia (NH 3), carbon dioxide (CO 2) and Sulphur dioxide (SO 2). ü The vapour compression Refrigeration system is nowadays used for all purpose refrigeration. ü It is generally used for all industrial purpose from a small domestic refrigerator to a big air conditioning plant.

2. COMPONENTS OF SIMPLE VCR: -

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

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

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

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

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

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

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

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

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

N O NAME T-S DIAGRAM 7. Three stage compression with Flash Intercooler 8. Three stage compression with Multiple Expansion valves and Flash chamber h-s diagram

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

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

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

NO NAME 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 T-S DIAGRAM h-s diagram

Thank You !