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Thermal Engineering Premium Lecture Notes - Sreedhar Edition

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Thermal Engineering Premium Lecture Notes - Sreedhar Edition
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Thermal Engineering Premium Lecture Notes (All 5 Units) Prepared by Sreedhar. Specially for Mechanical Engineering. Syllabus Covered based on Anna University B.E Mechanical Engineering.
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Thermal Engineering Premium Lecture Notes (All 5 Units) Prepared by Sreedhar. Specially for Mechanical Engineering. Syllabus Covered based on Anna University B.E Mechanical Engineering.

Content :

THERMAL ENGINEERING

UNIT-1

GAS POWER CYCLE

Cycle

Thermodynamic cycle

Power cycles area classified as follows

  1. Vapour power cycle
  2. Gas power cycle

Different types of air standard cycle

  1. Thermal combustion engine cycle
  2. External combustion engine cycle
  3. Air standard efficiency or ideal efficicency
  4. Otto cycle or constant volume cycle

Mean effective pressure

Expression for mean effective pressure of otto cycle

DIESEL CYCLE OR CONSTANT PRESSURE CYCLE

Dual combustion cycle

BRAYTON CYCLE

Basic terms used in IC engine

 

UNIT-2

IC ENGINE

Heat engine

  1. GC engine
  2. EC engine

Thermal combustion engines

Classification of IC engine

Working cycle

  1. Four stroke engine
  2. Two stroke engine

Fuel

  1. Petrol engine
  2. Diesel engine
  3. Gas engine

Thermodynamic cycle

  1. Otto cycle
  2. Diesel cycle
  3. Dual cycle

Speed

  1. Low speed engine
  2. Medium speed engine
  3. High speed engine

Method of cooling

  1. Air cooled engine
  2. Water cooled

Application

  1. Stationary engine
  2. Marine engine
  3. Automobile engine
  4. Motor cycle engine
  5. Aero engine
  6. Locomotive engine

Method of ignition

  1. Spark ignition engine
  2. Compression ignition engine

Arrangement of engine cylinder

  1. Horizontal engine
  2. Vertical engine
  3. V-engine
  4. In line engine
  5. Opposed cylinder engine
  6. Opposed piston engine
  7. Radial engine

I.C engine components and function

Comparision of four stroke and two stroke cycle engine

Fuel supply system in IC engine

Carburetor

Simple carburetor

  1. Float and float chamber
  2. Venture and throttle value
  3. Chope value

Fuel pump

Ignition system

Requirement of a ignition system

BATTERY OR COIL IGNITION SYSTEM

Advantages

Disadvantages

Performance test on IC engine

Indicator diagram

Indicated power

Mean effective pressure (pm)

Brake power

Different arrangement used to fulid brake power

  1. Pope brake arrangement
  2. Prony brake arrangement
  3. Based brake

Friction power

Mechanical efficiency

Thermal efficiency

Volumetric efficiency

Dynamometer

Problems

Heat balance sheet

Requirement of a good fuel

Knocking

 

UNIT-3

Steam nozzles

Application

Shape of steam nozzle

Mass flow rate of steam

Critical pressure ratio

Maximum velocity

Velocity diagram for impulse turbine

Problems

 

UNIT-4

AIR COMPRESSOR

Application

Classification of air compressor

  1. According to working
    1.  Reciprocating air compressors
    2. Rotary compression
    3. According to action
      1. Single acting
      2. Double acting
      3. According to number of stages
        1. Single stage
        2. Multistage compressor
        3. Air compressor may further classified as
          1. Air pumps and exhauster
          2. Blowers and super chargers
          3. Air boosters
          4. According to the method of cooling
            1. Air cooled
            2. Water cooled
            3. According to number of cylinder
              1. Simplex
              2. Duplex
              3. Triplex
              4. According to power drive
                1. Direct drive
                2. Belt drive
                3. Chain drive
                4. According to application
                  1. Rock drill compressor
                  2. Parameter land tool compressor
                  3. Sand blasting compressor
                  4. Spray compressor
                  5. According to principle of operation
                    1. Positive displacement compressor
                    2. Dynamic compressor
                    3. According to nature of installation
                      1. Portable
                      2. Semi fixed
                      3. Fixed

Problems

Clearance volume

 

UNIT-5

REFRIGERATION AND AIR CONDUCTING

Types

Unit of refrigeration

Reversed carnot  cycle

Coefficient of performance

Conclusion

Problems

Velocity diagram for impulse turbine

Reactive turbine

Degree of reaction

Steam turbine

Classification of turbine

  1. Impulse turbine
  2. Reaction turbine

Mass flow rate of system

Critical pressure ratio

Additional Information

Additional Information

Pages 94
Author Sreedhar
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