“Frictionless Compressor Technology”
In the partial fulfillment for award the degree of Bachelor of Engineering From
University of Rajasthan, Jaipur
Guided By:Mr. Kuldeep Sharma Lect. Department of Mechanical Engineering
Submitted By:Akshat Yadav IV Year, Mechanical Engineering
DEPARTMENT OF MECHANICAL ENGINEERING JAIPUR ENGINEERING COLLEGE AND RESEARCH CENTRE Session 2007-2008
JAIPUR ENGINEERING COLLEGE AND RESEARCH CENTRE
This is to certify that Akshat Yadav, student of VIII Semester, B.E., Mechanical Engineering, has completed the work of seminar and compiled the report entitled “ the submission.
Frictionless Compressor Technology”
guidance and supervision. Report has been found satisfactory and approved for
Mr. Kuldeep Sharma Lect. Department of Mechanical Engineering
I wish to express my sincere gratitude to Mr. Pankaj Sharma, Asst. Professor & Head, Department of Mechanical Engineering, who not only inspired me to work on this seminar but also guided me at each and every step so as to bring out this report in the present form. I would also like to thank s Mr. Kuldeep Sharma Lect. Department of Mechanical Engineering for their valuable advices at crucial times. I would also like to thank my friends who provided me with a proper atmosphere of study. Finally I would like to thank the almighty for his blessings without which this work could not have been accomplished.
Akshat Yadav IV Year, Mechanical Engineering
Table of Contents
1. Types of compressors 1.1 Centrifugal compressors 5 1.2 Diagonal or mixed-flow compressors 1.3 Axial-flow compressors 1.4 Reciprocating compressors 1.5 Rotary screw compressors 1.6 Rotary vane compressors 1.7 Scroll compressors 1.8 Diaphragm compressors 2. The “Emerging Technology in Centrifugal Compressor 3. Frictionless compressor 4. Mechanicalcomponents11 5. Advantages 6. Applications 7. References 24 25 26 10 9
1. Gas compressor
A gas compressor is a mechanical device that increases the pressure of a gas by reducing its volume. Compressors are similar to pumps: both increase the pressure on a fluid and both can transport the fluid through a pipe. As gases are compressible, the compressor also reduces the volume of a gas. Liquids are relatively incompressible, so the main action of a pump is to transport liquids.
Types of compressors
The main types of gas compressors are illustrated and discussed below:
Centrifugal compressors Centrifugal compressors use a rotating disk or impeller in a shaped housing to force the gas to the rim of the impeller, increasing the velocity of the gas. A diffuser (divergent duct) section converts the velocity energy to pressure energy. They are primarily used for continuous, stationary service in industries such as oil refineries, chemical and petrochemical plants and natural gas processing plants. Their application can be from 100 hp (75 kW) to thousands of horsepower. With multiple staging, they can achieve extremely high output pressures greater than 10,000 psi (69 MPa). Many large snow-making operations (like ski resorts) use this type of compressor. They are also used in internal combustion engines as superchargers and turbochargers. Centrifugal compressors are used in small gas turbine engines or as the final compression stage of medium sized gas turbines.
Diagonal or mixed-flow compressors Diagonal or mixed-flow compressors are similar to centrifugal compressors, but have a radial and axial velocity component at the exit from the rotor. The diffuser is often used to turn diagonal flow to the axial direction. The diagonal compressor has a lower diameter diffuser than the equivalent centrifugal compressor. Axial-flow compressors Axial-flow compressors are dynamic rotating compressors that use arrays of fan-like aerofoil to progressively compress the working fluid. They are used where there is a requirement for a...