In this article we will discuss about:- 1. Meaning of Compressor 2. Classification of Compressors 3. Performance Characteristics 4. Limitations. Meaning of Compressor: Compressor is a device which compresses air/gases or vapours from low pressure to high pressure. It needs external energy input in the form of work. Out of the total work input to the compressor, some work is [...]
In this article we will discus about:- 1. Construction and Principle of Operation of Centrifugal Compressor 2. Velocity Diagrams of a Centrifugal Compressor 3. Work Requirement (Euler's Work) 4. Slip Factor 5. Pressure Ratio of Compression 6. Influence of Impeller Blade Geometry 7. Influence of Compressor Geometry on the Performance 8. Pre-Whir 9. Losses. Contents: Construction and Principle of Operation [...]
The function of a governor is to control the fluctuation of speed of a prime mover within the prescribed limits with the variation of loads on it. In case of steam turbines when it is connected to drive an alternator for converting its mechanical energy into electrical energy, device is used to vary the turbine output according to the load [...]
In this article we will discuss about:- 1. Simple Impulse Turbine 2. Reaction Turbine 3. Impulse Reaction Turbine. Simple Impulse Turbine: The impulse turbine depends completely upon the dynamic action of the steam. The direction of motion of the steam is changed as it passes across the blade. As a result of change of direction of steam across the blade, [...]
In this article we will discuss about:- 1. Meaning 2. Steam Engine Parts and Their Function 3. Working 4. Indicator Diagram 5. Indicated Power (I.P.) 6. Efficiencies 7. Steam Consumption 8. Governing. Contents: Meaning of Steam Engine Steam Engine Parts and Their Function Working of a Steam Engine Indicator Diagram of Steam Engines Indicated Power (I.P.) of Steam Engine Efficiencies [...]
In this article we will discuss about:- 1. Introduction to Compound Steam Engines 2. Classification of Compound Steam Engines 3. Intermediate Pressure 4. Advantages and Disadvantages. Introduction to Compound Steam Engines: Nowadays high pressure steam from the high pressure boilers is generally used for power generation purpose because- 1. It gives higher cycle efficiency 2. Plant requires less space/kW of [...]
Compilation of lecture notes on ‘Steam Turbines’ for engineering students. Lecture Note # 1. Optimum Operating Conditions: Lecture Note # 2. Blade Height of Turbine: For impulse turbine the blade height at a particular section of a turbine will be function of mass flow rate (m), specific volume (v), area (A), and velocity of steam Let, P = pitch = distance [...]
In this article we will discuss about:- 1. Classification of IC Engines 2. Working of an IC Engine 3. Parts 4. Combustion 5. Performance. Internal combustion engines or IC engines are extensively used in automobiles, locomotives, marine application, power generation etc. Here the working media is hot and high pressure products of combustion of air and gasoline/diesel fuel. The combustion [...]
On the basis of the actual data available for the engine working, we can find the ideal cycle work and its efficiency. The actual work produced or developed in the engine cylinder will be less than the ideal work calculated from the ideal cycle. The amount of actual work obtained depends upon where it is measured. In Fig. 25.1, for [...]
In this article we will discuss about:- 1. Definition of Nozzle 2. Some Applications of a Nozzle 3. General-Flow Analysis 4. Velocity 5. Mass-Flow Rate 6. Critical Pressure Ratio 7. Effect of Friction 8. Velocity Coefficient 9. Super Saturated or Metastable Flow 10. Phenomenon in Nozzles Operating Off the Design Pressure Ratio. Contents: Definition of Nozzle Some Applications of a [...]