Question

A bell collman cycle works between 1 bar and 5 bar , adiabatic effficiency of compression 85%and expansion 90% . find cop of system and tonnage

Answer 1

1. <ul><li>Introduction to </li></ul><ul><li>Refrigeration & Air Conditioning </li></ul>ME0223 SEM-IV Applied Thermodynamics & Heat Engines Applied Thermodynamics & Heat Engines S.Y. B. Tech. ME0223 SEM - IV Production Engineering

2. Outline <ul><li>Applications of Refrigeration. </li></ul><ul><li>Bell – Coleman Cycle. </li></ul><ul><li>COP and Power Calculations </li></ul><ul><li>Vapour – Compression Refrigeration System. </li></ul><ul><li>Presentation on T-S and P-h diagram. </li></ul><ul><li>Vapour – Absorption System. </li></ul>ME0223 SEM-IV Applied Thermodynamics & Heat Engines

3. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Refrigeration REFRIGERATION – Science of producing and maintaining temperature below that of surrounding / atmosphere. REFRIGERATION – Cooling of or removal of heat from a system. Refrigerating System – Equipment employed to maintain the system at a low temperature. Refrigerated System – System which is kept at lower temperature. Refrigeration – 1) By melting of a solid , 2) By sublimation of a solid, 3) By evaporation of a liquid. Most of the commercial refrigeration production : Evaporation of liquid. This liquid is known as Refrigerant.

4. Refrigeration Circuit Refrigeration Circuit ME0223 SEM-IV Applied Thermodynamics & Heat Engines Evaporator Compressor Condenser Expansion Valve

5. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Refrigeration - Elements Compressor Condenser Evaporator Expansion Valve W net, in Surrounding Air Refrigerated Space Q H Q L High Temp Source Low Temp Sink Q H Q L Wnet, in

6. ME0223 SEM-IV Applied Thermodynamics & Heat Engines Refrigeration - Applications 1. Ice making . 2. Transportation of food items above and below freezing. 2. Industrial Air – Conditioning . 4. Comfort Air – Conditioning . 5. Chemical and related industries. 6. Medical and Surgical instruments. 7. Processing food products and beverages. 8. Oil Refining. 9. Synthetic Rubber Manufacturing. 10. Manufacture and treatment of metals. 11. Freezing food products. 12. Manufacturing Solid Carbon Dioxide. 13. Production of extremely low temperatures ( Cryogenics ) 14. Plumbing. 15. Building Construction. Applications :