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chapter 7 Compressor and Turbine

chapter 7 Compressor and Turbine. 7-1 Classification of Compressor. compressor. Positive displacement. Turbine. reciprocating. rotary. centrifugal. axial flow . This is the type we will study. 7-2 Compressor Work. p. v. 7-2-1 The cycle of compressor. 7-2-2 Compressor Work.

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chapter 7 Compressor and Turbine

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  1. chapter 7 Compressor and Turbine

  2. 7-1 Classification of Compressor compressor Positive displacement Turbine reciprocating rotary centrifugal axial flow This is the type we will study

  3. 7-2 Compressor Work p v 7-2-1 The cycle of compressor

  4. 7-2-2 Compressor Work

  5. If isothermal If polytropic If isentropic

  6. p Isothermal Polytropic Isentropic v

  7. 7-3 Real compressor 7-3-1 Clearance volume

  8. 7-3-2 The effect of Clearance volume p v

  9. 7-4 Multistage Compression with Intercooling p p2 B pm A p1 v

  10. Since p1v1=pmvm

  11. To get the minimum work Then:

  12. 7-5 Steam Turbine 7-5-1 Steam Turbine

  13. v h p2 p1 T1 T2 c X=1 X=0.8 X=0 X=0.6 s 7-5-2 h-s Diagram • constant pressure curves (2) Isothermal curves (3) constant specific volume curves (4) constant dryness fraction curves

  14. 7-6 Adiabatic Efficiency of Steady-Flow Devices 7-6-1 Compressor If an adiabatic compressor:

  15. h P2 2’ 2 w’ w P1 s 1 Draw the process on a h-s diagram But if the process is an irreversible process, it will be: Therefore we define the inner efficiency of compressor as following: This equation can also be used for pump

  16. h P1 1 w’ w P2 s 2 2’ 7-6-2 Turbine If an adiabatic turbine: If irreversible: Therefore we define the inner efficiency of turbine as following: This equation can also be used for nozzle

  17. The end of this chapter

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