Fuels Ppt 1dw7

Title: FUELS

Introduction Types of Fuels used in Vehicles Properties of different Fuels Factors considered for selection of a vehicle based on Fuel Conclusion References

INTRODUCTION Fuel? Fuel is any material that stores energy that can later be extracted to perform mechanical work in a controlled manner.

Types and Properties of Fuels As in India, diesel and petrol are main fuel types where the main difference is defined by the cost of operating. Today we will discuss about some other fuels along with the conventional type .Which is better for what? And which should I choose? Though there are alternative fuels like bio-gas and ethanol, we are not dealing in detail as they are not used in practice due to non-availability in sufficient quantity. Petrol Diesel CNG LPG Compressed Air Apart from these fuels we can also use Electric and Hybrid Vehicles which are eco-friendly

Gasoline Gasoline or petrol is a petroleum-derived liquid mixture which is primarily used as a fuel in internal combustion engines is a fuel of the past. A typical gasoline is predominantly a mixture of paraffin's ,naphthenes and olefins Energy content per kilogram is higher than for gasoline (higher hydrogen to carbon ratio)

The weight-density of gasoline is about 740 kg/m³ (6.175 lb/US gal) Gasoline contains about 43.2 MJ/L energy content The CO2 emissions from diesel are 73.38 g/MJ Octane rating of gasoline is it’s ability to resist Auto-ignition is measured relative to a mixture of 2,2,4-trimethylpentane (an isomer of octane) and n-heptane

Diesel Diesel in general is any liquid fuel used in diesel engines produced from petroleum and many other sources. Density of diesel is about 0.832 kg/l (6.943 lb/US gal), about 12% more than ethanol free petrol (gasoline), which has a density of about 0.745 kg/l (6.217 lb/US gal) Offers a net heating value of 43.1 MJ/kg as opposed to 43.2 MJ/kg for gasoline Higher volumetric energy density at 35.86 MJ/l (128 700 BTU/US gal) vs. 32.18 MJ/l (115 500 BTU/US gal) for gasoline The CO2 emissions from diesel are 73.25 g/MJ, just slightly lower than for gasoline at 73.38 g/MJ Cetane number for diesel is a measure of the fuel’s delay of ignition time

CNG Compressed natural gas (CNG) is a fossil fuel substitute for gasoline (petrol), diesel, or propane/LPG.

Produced by compressing natural gas methane [CH4]), to less than 1% of the volume it occupies at standard atmospheric pressure. It is stored and distributed in hard containers at a pressure of 200–248 usually in cylindrical or spherical shapes. Volumetric energy density is estimated to be 42% of LNG's (because it is not liquefied), and 25% of conventional vehicles. CNG is less likely to auto-ignite on hot surfaces, since it has a high auto-ignition temperature (540 °C) and a narrow range (5%-15%) of flammability. CNG can be used in Otto-cycle (gasoline) and modified Diesel cycle engines except the design should be altered.

CNG fuel systems are sealed, which prevents any spill or evaporation losses CNG does not contaminate and dilute the crankcase oil. CNG takes up more space for each gasoline gallon equivalent (GGE) and greater amount of space for fuel storage

LPG Liquefied petroleum gas (LPG) is a flammable mixture of hydrocarbon gases used as a fuel in heating appliances and vehicles. The international standard is EN 589. Specific calorific value of 46.1 MJ/kg compared with 42.5 MJ/kg for fuel-oil and 43.5 MJ/kg for grade petrol (gasoline) Energy density per volume unit of 26 MJ/l is lower than either that of petrol or fuel-oil Higher calorific value (94 MJ/m3 equivalent to 26.1kWh/m³) than natural gas (methane) (38 MJ/m3 equivalent to 10.6 kWh/m3) Used as an aerosol propellant and a refrigerant to reduce ozone layer damage compared to CFC’s. Liquefied Compressed Natural Gas (LCNG). LNG can be pressurized and vaporized to give LCNG.

COMPRESSED AIR If we can use air as fuel, why think ing anything else? Air is all around us. Air never runs out. Air is nonpolluting. Best of all, air is free. Less working temperatures up to only 100 degree Celsius Carbon or glass fiber tanks can crack easily are used to avoid explosion during accidents where Air is stored at a pressure of 4,351 psi  Priced at $12,700-$15000 can hit 68 mph at a range of 125 miles Takes just minutes to get refueled

Cost only around $2 to fill the car up with 340 liters of air 0.176 pounds of carbon dioxide emissions per mile compared to 0.40 of I.C engines

Already the “ Evolution car ” that is being built by Zero Pollution Motors, in Brignoles, and the engine is some 50% more efficient than the four-stroke variety.

CityCAT developed by MDI is about to be introduced in India by TATA Motors

ELECTRIC VEHICLE An Electric car is a plug-in battery powered automobile which is propelled by electric motor(s) unlike a hybrid car, which is propelled by gasoline and uses a battery and motor to improve efficiency . 12g per km CO2 emissions compared to 250g for a conventional vehicle $5000 - $ 8000 more expensive than an conventional vehicle

Battery consumption cost of US$ 0.1174 per 1 mile (1.6 km) Top speed of 250 mph and can accelerate from 0 to 60 mph (97 km/h) in 3.7 seconds On-board efficiency of around 80% compared to 15% of gasoline and 20% of Diesel engines Vehicle efficiency is typically 24.4 kW·h/100 km High torque over a larger range of speeds during acceleration because they are function of current, not rotational speed

HYBRID VEHICLE A Hybrid electric vehicle (HEV) is that which uses two or more distinct power sources to move the vehicle generally an I.C engine and one or more electric motors. The types of Hybrids are: • Parallel hybrid • Mild parallel hybrid • Power-split or series-parallel hybrid • Series hybrid • Plug-in hybrid electrical vehicle (PHEV) HEV has an average mileage rating of 60 mpg/city and 66 mpg/highway Top speed of 50 to 100 miles from 90 horsepower at 5,700 rpm The rare earth element dysprosium used in motor parts and Neodymium in high-strength are rare and costly elements

Reduce air emissions of smog-forming pollutants by up to 90% and 50% of CO2 Use of lithium-ion batteries reduces the weight of the vehicle and also achieves improved fuel economy of 30% better than gasoline-powered vehicles Shutting down the engine during traffic stops or while coasting or during periods Improving aerodynamics

Reduces mechanical losses Regenerative braking

Factors influencing to choose a vehicle are: Now that we have understood about each type of vehicle , let us check out some more commercial factors affecting a customer. Investment Running cost Maintenance Comfort Performance Environment Availability

Investment Of the fuel types mentioned, we can easily state that petrol engine is the cheapest. This is because the petrol engine is the base engine and simplest one. CNG and LPG both require minor engine modifications. The diesel engine is technically more complex than the petrol engine and hence also more expensive. The Electric and Hybrid are also costly because of the design changes and might charge up to 250000 more than petrol engine.

Rank

Fuel Type

Expense vs. Petrol

1

Petrol

0

2

LPG

20000

3

CNG

40000

4

Diesel

100000

5

Air

150000

Running cost The running costs of different fuel types, is determined by the cost per liter/kg of the fuel, and the mileage of the same. Electric and Hybrid vehicles cost very cheap up to Rs 05 / L

Rank

Fuel Type

Cost

1

CNG

Rs 18 / KG

2

LPG

Rs 25 / KG

3

Diesel

Rs 38 / L

4

Petrol

Rs 50 / L

5

Air

Rs 0.3 / L

A gasoline vehicle’s expected mileage is around 15 KMPL on an average and hence the cost per KM will be Rs 3.3 (Rs 50 divided by 15) and as shown for others.

Rank

Fuel Type Cost

Mileage (AVG) Cost per KM

1

CNG

Rs 18 / KG

21 KM/KG

Rs 0.84

2

LPG

Rs 25 / KG

21 KM/KG

Rs 1.15

3

Diesel

Rs 38 / L

17 KMPL

Rs 2.3

4

Petrol

Rs 50 / L

15 KMPL

Rs 3.3

5

Air

Rs 25 / L

28 KMPL

Rs 0.9

Maintenance •Maintenance is mainly of two types

• Periodic (scheduled) maintenance is replacing of parts etc as per the expected good life • Breakdown maintenance is the replacement of damaged parts of problems that arise suddenly •Diesel engines maintenance are costlier to petrol vehicles also are LPG/CNG engines. •CNG/LPG engines, the cost of repairs will increase with problems arising in head assy. •Electric/Hybrid batteries needs to be checked daily . Rank

Fuel Type

1

Petrol

2

Diesel

3/4

CNG / LPG

5

Air

Comfort Petrol engines are recognized for its smoother operation, quietness and good acceleration Diesel engines on the other hand are quite noisy, have slower pickup and frequent cold starting problems LPG and CNG, problems are reported for foul smell, cold starting problems The Electric, Air and Hybrid probably produce lesser noise than others Rank

Fuel Type

1/2

Air

3

Petrol

4

LPG/CNG

5

Diesel

Performance Petrol engines have an advantage over other fuels in of faster pickup and power Diesel engines accelerate slowly and are more suitable for long usages LPG/CNG fitments suffer from a slight lack of initial pickup, but accelerate faster than their diesel type Electric and Hybrid operate at good speeds but the Air vehicle remains at the last Rank

Fuel Type

1

Petrol

2/3

LPG/CNG

4

Diesel

5

Air

Environment Petrol has the disadvantage of emitting carbon monoxide, which is a very poisonous gas

Diesel, though it emits dusty gas, has more environment friendly emissions than petrol LPG/CNG are much more environmental friendly and produces a clean exhaust gas Electric is the least polluter as Air and Hybrid follow them Rank

Fuel Type

1

Air

2/3

LPG/CNG

4

Diesel

5

Petrol

Availability Petrol and diesel are easily available at all gas stations LPG, CNG ,a large amount of it is produced in India and risk of price shocks is smaller Electricity is a problem which the government should come up with a solution

Rank

Fuel Type

1

Petrol

2

Diesel

3/4

LPG/CNG

5

Air

Conclusion Usually in certain areas either of CNG or LPG is available. Hence, for s, the choice is generally between diesel, petrol or CNG (for North India) or diesel, petrol or LPG (for South India).

Engine Type Petrol

Investment 1

Running Mainte- Comfort PerforCost nance mance 3 5 4 1

Environ- Availabili Conclument ty sion 6 4 ?

Diesel

3

2

6

6

3

5

5

?

LPG/CNG

2

1

3

5

2

4

2

?

Electric

4

6

2

1

5

1

6

?

Air

6

5

1

3

6

2

1

?

Hybrid

5

4

4

2

4

3

3

?

Now, I have left the conclusion column empty on purpose. Why? Because, this depends completely on your personal preferences. Do you want a speedy, fast car? Then petrol is the way to go.

Are you nuts about the environment? CNG , LPG or HYBRID are for you. Do you want economy with carefree ownership? Then diesel would be most likely be better for you.

Near zero emissions go for Electric.

THANK YOU

References http://www.howstuffworks.com/electric-car.htm http://www.hybridcars.com/electric-car http://www.cartradeindia.com/car-bike-news/petrol+-diesel+cng-or-lpg-we-help-you-choose--111207.html http://en.wikipedia.org/wiki/Liquefied_petroleum_gas http://en.wikipedia.org/wiki/Compressed_natural_gas

JOURNAL OF ENGINES – SAE Transactions http://www.aircarfactories.com/FAQ_AirCar.html www.tiaxllc.com