Power Plant (Part 2)

Turbines

ME 268 - Fundamentals of Mechanical Engineering

(Model Lab)

Partha Kumar Das Lecturer Dept. of Mechanical Engineering, BUET

2

Turbo Machinery

3

Classification of Turbo Machinery

4

Turbines

1. Hydraulic Turbines, 2. Gas Turbines, 3. Steam Turbines, 4. Wind Turbines

According to Hydraulic Action

1. Impulse Turbines (Pelton Wheel, Girard Turbine, Banki Turbine, Jonval Turbine)

2. Reaction Turbines (Francis Turbine, Kaplan Turbine, Propeller Turbine)

According to Direction of Flow of Water

1. Axial Turbines (Kaplan, Propeller) 2. Radial Turbines (Francis)

3. Tangential Flow Turbines (Pelton)

According to Head

1. High Head Turbines (Pelton) 2. Medium Head Turbines (Francis)

3. Low Head Turbines (Kaplan, Propeller)

5

Pelton Wheel

Impulse, Tangential flow, High Head

6

Pelton Wheel

7

Pelton Wheel (Bucket)

8

Francis Turbine

Reaction, Radial flow, Medium Head

9

Kaplan Turbine

Reaction, Axial flow, Low Head

10

Kaplan Turbine

Reaction, Axial flow, Low Head

11

Hydroelectric Power Plant

12

Hydroelectric Power Plant

13

GAS TURBINE

14

GAS TURBINE

15

GAS TURBINE

Heat

Exchanger

16

CCPP

17

Jet Engine

18

Turbojet Engine

19

Turbofan Engine

• More efficient than the turbo jet

• Quieter engine due to the bypass air. Bypass ratio is 2:1 or 5:1

20

Turbofan Engine

21

Turboprop Engine

• More turbine power for running both compressor and heavy propeller

• Limited to low altitude and low speed

22

Turboprop Engine

Airbus Military Cargo Aircraft

23

24

Ram Jet

• Needs to be brought to sufficiently high speed by an external source before it can be fired.

• Performs best when air craft speed is above 2-3 Mach

25

Ram Jet

SR-71 Blackbird (1964 -2001)

26

Pump

27

Classification of Pump Positive Displacement and Rotodynamic Pump

Positive Displacement Pump

Reciprocating Pump Rotary Pump

28

Rotodynamic Pump

29

Rotodynamic Pump (Centrifugal Pump)

30

Priming in Centrifugal Pump

References

31

1. Power Plant Technology by M.M.El Wakil

2. Hydraulics And Fluid Mechanics Including Hydraulics

Machines by Dr. S.M. Seth and P. N. Modi

3. http://teacher.buet.ac.bd/aashiquear

Thank you