ECE5320 Mechatronics Assignment #1 Literature Survey on
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Transcript ECE5320 Mechatronics Assignment #1 Literature Survey on
Prepared by: Berk Demirgok
Dept. of Electrical and Computer Engineering
Utah State University
3/15/2012
References
Overview
Types of compressors
Major applications
Purchasing
Fluid Mechanics: Fundamentals and
Applications By Yunus A. Çengel, John M.
Cimbala - McGraw-Hill College (2009)
Introduction to Fluid Mechanics [Book] by
Robert W. Fox, Philip J. Pritchard, Alan T.
McDonald
Mechanical measurements by Thomas G.
Beckwith, Roy D. Marangoni, John H. Lienhard
Wikipedia
http://www.chem.queensu.ca/people/faculty
/mombourquette/firstyrchem/GasLaws/inde
x.htmhttp://www.electronicstutorials.ws/io/io_2.html
http://www.fscconline.com/%22Passing%20Gas%22article/passing_gas.htmlhttp://www.autonics.
com/products/products_2.php?big=01&mid=
01/06
https://engineering.purdue.edu/~propulsi/pr
opulsion/jets/basics/comp.html
http://knowledgepublications.com/doe/doe_
mechanical_science_web_educational_textbook
_solar_hydrogen_fuel_cells.htm
Compressors increases pressure on a fluid,
gasses with compressing gasses. With
increasing pressure, volume of gasses are
reduced by compressors. However, liquids are
incompressible and cannot be used as a fluid
for compressors.
Also, note that when compressors change the
pressure of a fluid, fluid’s temperature changes
Moreover, pumps are like compressors. They
both work in the same principle. However,
pumps can only transport the fluid.
http://www.aardvarkclay.com/catalog_p
ages/compressors.html
Compressibility helps us to measure volume
change of fluids as a reaction to change in
pressure.
𝑃 ∗ 𝑉 = 𝑛 ∗ 𝑅 ∗ 𝑇 is the relation between
volume, pressure, unity and temperature. This
equation is called ideal gas law and we can use
it as a compressibility factor equation.
Compressibility factor equation is
𝑃∗𝑉 =𝑍∗𝑅∗𝑇
𝑃∗𝑉 =𝑛∗𝑅∗𝑇
𝑃∗𝑉 =𝑍∗𝑅∗𝑇
P is the pressure and its unit is Pa in SI units.
V is the volume and its unit is m^3.
N is the amount of substance of a gas and its unit
is mol.
R is the universal gas constant, 0.08206
L*atm*mol^-1*K^-1.
T is the temperature and its unit is K.
Z is compression factor for gasses.
For each type of fluid or gasses, they have their
own compression factors. Next slide shows z
factors for only air.
• http://www.chem.queensu.ca/people/
faculty/mombourquette/firstyrchem/G
asLaws/images/compressibility.gif
Turbo Compressors
Axial
Centrifugal
Displacement Compressors
Reciprocating
Rotary
Screw
http://www.refrigeratortroubleshoot.com
/refrigerating-compressors.html
Centrifugal Compressors are also called
annular compressors.
It uses a rotating impeller rotating with really
high speed to apply force on refrigerant into a
diffuser. Diffuser section converts the velocity
energy into pressure energy.
Advantages
Easy to design and fabrication
It generally rises the pressure enough for efficient
combustion with only one step without any
problems.
Disadvantages
Less fuel efficiency
Pressure ratio is generally lower causing creating
less thrust.
http://www.georgiapower.com/energy_k
nowhow/images/c00090.gif
Working fluid goes through out parallel the
axis of rotation. However working fluid goes
vertical for centrifugal compressors.
Advantages
It creates higher flow rate and pressure so that
increases thrust and fuel efficiency.
High peak efficiency.
They large mass flow volume.
Disadvantages
Axial compressors are hard to built and costs a lot
of money to manufacture.
They weigh much higher than centrifugal
compressors.
In order to start axial compressors, it requires high
starting power.
Typical axial Compressor is shown below.
http://www.adl.gatech.edu/classes/prop
ulsion/prop12.html
Reciprocating compressors that the volume of
fluid is reduced by a movement of a piston
inside cylinder.
Rotary compressors that the volume of fluid is
reduced by rotation of some parts without
reciprocating or piston movement.
Reciprocating and rotary compressor
http://nuclearpowertraining.tpub.com/h1
018v2/img/h1018v2_86_1.jpg http://knowledgepublications.com/doe/i
mages/DOE_Mechanical_Science_Recipro
cating_Air_Compressor.gif
Advantages
They are inexpensive.
They have very wide-range horsepower options.
Better mass flow rate.
Better efficiency.
Compressors are widely used in our world.
Some of the application areas are:
Medical use
Welding use
Aircrafts
Air conditioner
Pipeline transport
Rail transport
Automotive Industry
Price range is very different for each type of
compressor. You can reduce your cost by
thinking buying used compressors.
There are some good online stores to buy
compressors.
www.aircompressorsdirect.com
www.lowes.com
www.compressor.pronto.com
www.northerntool.com