AirCompressor_20EE035_p lknlnresentation.pptx

Air compressor Slides

1. Air Compressor and its Classification

2. Air Compressor The process of increasing the pressure of Air reducing its volume is known as compression and the mechanical device that perform this process is known as Air Compressor. Prime mover(motor) is used as input to run the compressor. The compressed air has wide applications in different industries,like : Chemical, Fertilizer, Refrigeration, Cold Storage & etc. 2

3. 3 As per 2 nd law of thermodynamics Sink Prime Mover Source Compressor Heat of Friction and Coolant Low Pressure Air Compressed Air Work Heat Heat Rejected

4. Air Compressor 4

5. Applications of Air Compressors It is also plays a vital role in following systems: Power Generations / Gas Turbine Engine Jet Engine Submarines Oil & Gas Refinery / Productions Starting and Supercharging of I.C Engines Pneumatic Tools (drills, hammer, riveters etc.) Spray Paint Gun CNG Stations, & etc. 5

6. Classification Of Air Compressors 6

7. Classification of Air Compressor Positive Displacement compressor: The main disadvantage of positive displacement compressor is that the displacing mechanism provides lower mass flow rates than the non-positive is placement compressors. Dynamic OR Centrifugal Compressor: Dynamic type are those compressors in which air is not trapped in the specified boundaries, but flow is continuously and steadily through the compressor by an action of Centrifugal Forces 7

8. Reciprocating Air Compressor Reciprocating Air Compressor is a type of positive displacement Air Compressor in which air is sucked into a chamber and compressed with the help of a reciprocating piston. (produce high pressure effect) 8

9. WORKING OF RECIPROCATING AIR COMPRESSOR Working depends upon three strokes; Suction stroke(air entering process) Compression stroke(air compressing process) Delivery stroke(air is taken out) 9

10. Types of Reciprocating Compressor Single stage, single Cylinder Single stage two Cylinder Two stage two cylinder 10

11. SINGLE STAGE, SINGLE CYLINDER RECIPROCATING AIR COMPRESSOR 11

12. SINGLE STAGE,TWO CYLINDER AIR COMPRESSOR 12

13. TWO STAGE, TWO CYLINDER AIR COMPRESSOR 13

14. DYNAMIC OR CENTRIFUGAL AIR COMPRESSOR Centrifugal Compressors efficiently converts the energy utilizing a series of stages to compress and cool the air as it continuously flows through the unit. 14

15. Efficiency of Air Compressor n C = W ideal / W actual 15

16. Minimizing the Compressor Work Input When the compression process is executed in an internally reversible manner. A way of reducing the compressor work is to keep the specific volume of the gas as small as possible during the compression process. By maintaining the gas temperature as low as possible during the compression process. This requires that the gas be cooled as it is compressed. 16

17. 17