compress air engine & why not so in use

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COMPRESSED AIR VEHICLE VIEW WHY NOT SO IN USE
SEMINAR MEH801
Submitted By Sachin Garg Mechanical 4th
year 116248
Under Guidance Of Mr. Bhupesh Kumar Dept. of
Mechanical Engg.
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References
1.Haisheng Chen et al. Air fuelled zero emission
road transportation A comparative study,
Applied Energy 88 (2011), 24 June 2010, pp
337342 2. Amir Fazeli et al. A novel
compression strategy for air hybrid engines
Applied Energy 88 (2011), 8 March 2011, pp
29552966 3. Ulf Bossel Thermodynamic Analysis
of Compressed Air Vehicle Propulsion European
Fuel Cell Forum,Morgenacherstrasse 2F CH-5452
Oberrohrdorf/Switzerland, April 2,
2009 4.MDIEnterprisesS.A(http//www.mdi.lu/eng/aff
icheeng.php?pageminicats).Mdi.luRetrieved
2010-12-12. 5.www.theaircar.com 6.www.
zeropollution.com 7.www.howstuffwork.com 8.www.the
hindubusinessline.com 9.thefraserdomain.typepad.co
m
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Outline

• INTRODUCTION
• PROBLEM WITH GASOLINE
• COMPRESSED AIR VECHICLE
• BASIC PRINCIPLE
• WORKING
• ADVANTAGES
• LIMITATIONS
• CONCLUSION

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INTRODUCTION

• Our world is facing fuel crisis, air pollution.
• All kind of conventional source of fuel are on
  verge of exhaustion.
• Gasoline is the primary source of fuel.
• Gasoline is becoming more and more expensive and
  impractical.

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Problem With GASOLINE
Polluted
Expensive
Non Renewable
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Alternative energies

• Air Energy
• Solar Energy
• Electric Energy

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compressed-air vehicle

• A compressed-air vehicle is powered by an air
  engine, using compressed air, which is stored in
  a tank.
• Instead of mixing fuel with air and burning it in
  the engine to drive pistons with hot expanding
  gases.
• Compressed air vehicles (CAV) use the expansion
  of compressed air to drive their pistons.
• One manufacturer claims to have designed an
  engine that is 90 percent efficient.

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Basic PRINCIPLE

• First of all inflate a balloon
• Then the elastic skin of balloon is hold the air
  very tightly from inside, but at the same time
  when use to create a hole through pin into it.
• Then the air expands in the outward direction
  with so much energy that the balloon explodes
• Compressing the gas into a small space is a way
  to store energy
• If again the gas expands ,thats mean energy is
  released to do work
• Thats the basic principle behind it to makes the
  engine go.

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Working

• Normally in off condition Solenoid valve air
  inlet hole are B and D and outlet hole are E and
  C.

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Cont
In ON condition Solenoid valve air inlet hole are
B and E and outlet hole are Dand A.
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Cont
We weld two crankshafts and connect pneumatic
cylinder with them and fix them on body frame
with the help of bearing
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Power Transmission
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Cont
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Advantages from research papers

• Bharat Raj Singh1 and JP Yadav2 (2011) in their
  endeavour have evaluated the performance of
  compressed air engines.
• Their preliminary analysis based on the prototype
  calculation shows that around 3 cubic metre of
  air at a pressure more than 30bar can give a
  mileage equivalent to one litre petrol i.e. Rs 64
  
• Cost of production of one cubic metre of air at a
  pressure of 50bar is Rs 3.
• Hence air of Rs 9 can give the mileage of Rs 64
  of petrol.
• 1 Bharat Raj Singh, Associate Director, SMS
  Institute of Technology, Lucknow
• 2 JP Yadav, Associate Professor, Chandra Shekhar
  Azad University of Agriculture Technology

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Information from other research papers

• Technical benefits
• The temperature of the engine while working will
  be slightly less than the ambient temperature.
• Smooth working of the engine due to very less
  wear and tear of the components.
• There is no possibility of knocking.
• No need of cooling systems and spark plugs or
  Complex fuel injection systems

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Cont

• Air, on its own, is non-flammable, abundant
  economical, transportable, storable and, most
  importantly, nonpolluting.
• Compressed air technology reduces the cost of
  vehicle production by about 20, because there is
  no need to build a cooling system, fuel tank,
  spark plugs or silencers.
• The mechanical design of the engine is simple
  and robust.
• Low manufacture and maintenance costs as well as
  easy maintenance.
• Lighter vehicles would mean less abuse on roads,
  thus, resulting in longer lasting roads.
• The price of fueling air powered vehicles will
  be significantly cheaper than current fuels.

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WHY NOT IN SO USE?
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Limitations from research papers

• A 2005 study demonstrated that cars running on
  lithium-ion batteries outperform both compressed
  air and fuel cell vehicles more than three-fold
  at same speeds.
• MDI has recently claimed that an air car will be
  able to travel 140km in urban driving, and have a
  range of 80 km with a top speed of 110km/h on
  highways.

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Cont

• Less power output
• Probability of air leakage.
• Less air station are available.
• Biggest disadvantage is the energy needed to
  compress the air is greater than the energy
  stored
• Within the vehicle, expansion and consequent
  pressure reduction in the throttle or engine
  chills the air, reducing its effective pressure.
  Addition of ambient heat will increase this
  pressure and this addition leads to a more
  complex propulsion system.
• Passenger compartment heating is more difficult
  since the propulsion system does not provide a
  source of waste heat. Some form of heat pump, or
  more likely, an electric heater would be
  required.

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Cont

• Refueling the compressed air container using a
  home or low-end conventional air compressor may
  take as long as 4 hours though the specialized
  equipment at service stations may fill the tanks
  in only 3 minutes.
• Tanks get very hot when filled rapidly. Tanks are
  sometimes immersed in water to cool them down
  when they are being filled. That would not be
  possible with tanks in a car and thus it would
  either take a long time to fill the tanks, or
  they would have to take less than a full charge,
  since heat drives up the pressure.

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Conclusion

• Its important to remember that while vehicles
  running on only compressed air might seem like a
  distant dream, but they still have public
  interest due to their environmental friendly
  nature.
• Efforts should be to make them light, safe, cost
  effective and economical for deriving.
• Electric-powered cars and bikes already available
  on the market put a strong competition to
  compressed air car not only in terms of cost but
  also their environment friendly role.
• The technology still looks distant but that has
  not deterred inventors from working on it.

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THANK YOU
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Question ??