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Thermodynamic cycles

  1. 1. THERMODYNAMICS CYCLES • Umar Tariq • Junaid Badar • Muhammad Zaroon
  2. 2. Flow Of Presentation  Introduction  Relation b/w Carnot and Ideal Cycle  Carnot Cycle  Stirling Cycle  Diesel Cycle  Rankine Cycle  Reheat Cycle  Q/A session
  3. 3. Thermodynamic cycle Introduction  STATEMENT ’’Thermodynamic processes that involve the transference of heat and work into and out of the system by varying pressure, temperature, and other state variables within the system’’
  4. 4. Thermodynamics cycle Ideal Cycle A cycle that resembles the actual cycle closely but is made up totally of internally reversible processes is called an Ideal cycle. Carnot Cycle : Infect , it is a type of an ideal Cycle because carnot cycle has maximum efficiency closer to ideal cycle.
  5. 5. Thermodynamics cycle Carnot Cycle 1-2 Reversible Isothermal Expansion (Heat Addition) 2-3 Reversible Adiabatic expansion 3-4 Reversible Isothermal compression (Heat Rejection) 4-1 Reversible Adiabatic Compression
  6. 6. Thermodynamics cycle Stirling cycle 1-2 Reversible Isothermal Expansion (Heat Addition) 2-3 Reversible Adiabatic expansion 3-4 Reversible Isothermal compression (Heat Rejection) 4-1 Reversible Adiabatic Compression
  7. 7. Thermodynamics cycle Stirling cycle (Efficiency )  Highest theoretical efficiency  Expensive to make  Not competitive with other types for normal commercial use
  8. 8. Thermodynamics cycle Diesel Cycle (Figure Representation) 1-2 Isentropic compression 2-3 Constant-Pressure heating 3-4 Isentropic expansion 4-1 Constant-volume heat rejection
  9. 9. Thermodynamics cycle Diesel Cycle (Diagram Representation) 1-2 Isentropic compression 2-3 Constant-Pressure heating 3-4 Isentropic expansion 4-1 Constant-volume heat rejection
  10. 10. Thermodynamics cycle Diesel Cycle (Efficiency)  Diesels Engines, efficiency of about 40%  Turbo charged has efficiency of 50%
  11. 11. Thermodynamics cycle Rankine Cycle
  12. 12. Thermodynamics cycle Rankine Cycle
  13. 13. Thermodynamics cycle Rankine Cycle (steam engine) 1-2 isentropic pump 2-3 constant pressure heat addition 3-4 isentropic turbine 4-1 constant pressure heat rejection 1 2 3 4
  14. 14. Thermodynamics cycle  Reheat Cycle
  15. 15. Thermodynamics cycle Rankine Cycle (Efficiency) Rankine cycle which has a maximum Carnot efficiency of 63%
  16. 16. Thermodynamics cycle Question/Answering
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