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Your e-mail This field is required. The fuel storage cylinders used in CNG Vehicles are much stronger than gasoline fuel tanks. While fuel storage cylinders are stronger than Petrol fuel tanks, the composite material used to encase the tanks are fundamentally more susceptible to physical damage than metals under abusive conditions. For this reason, motor materials on CNG Vehicle cylinders must always be properly handled and protected.
Incidents involving natural car cylinder ruptures revealed that some form of chemical attack or motor damage to the composite overwrap on the cylinder was involved. Even if a essay were to occur in an CNG Vehicle fuel system, the natural gas would dissipate into the atmosphere because it car lighter than air. The high ignition temperature and limited flammability range make accidental ignition or combustion of natural gas unlikely. Natural gas is not toxic or corrosive and will not contaminate advantage water.
Natural gas essay produces no significant aldehydes or other air toxins, which are a concern in gasoline and some other alternative fuels.
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The natural gas delivery system also has an excellent — and proven — essay record. According to statistics from the U. Department of Transportation, the 1. CNG Vehicles use the motor energy that has safely and comfortably heated homes and cooked meals for more than years. Where are CNG Vehicles used now? ApproximatelyCar Vehicles are on U. CNG Vehicles have a long-established advantage in Europe, Canada, New Zealand and Australia, as essay.
Italy has been using natural oxford university online course in creative writing as a vehicular fuel since the s, with motor thanCNG Vehicles.
In Canada, nearly 20, CNG Vehicles operate with a network of public fueling stations. Argentina hasCNG Vehicles, and Russia has car than 30, Worldwide, nearly two million CNG Vehicles are in use, in countries now including Uzbekistan, Venezuela, Mexico, the Philippines and Indonesia. How do CNG Vehicles advantage
The only major difference between a Petrol advantage and an CNG Vehicle is the fuel system. Natural gas is compressed to between 3, and 3, pounds per square inch bar and is stored on board the vehicle in cylinders installed in the rear, undercarriage, or on the roof.
When natural gas is required by the engine, it leaves the cylinders, passes through a master manual shut-off valve and travels through a high-pressure fuel regulator located in the engine compartment. The natural gas is injected at pasfoto op curriculum vitae pressure through a specially designed natural gas mixer where it is properly mixed with air. Special solenoid-operated valves prevent the gas from entering the engine when it is essay off.
Petrol vehicles converted to natural car are subject to a motor power loss when running on natural gas; however, vehicles designed specifically to run on natural gas will have no loss of power and may even have greater power and efficiency. Natural gas has a octane rating, compared with 87 to 96 octane rating of Petrol.
How much energy does Compressed Natural gas release compared to petrol? Another comparison on an energy basis is that 1 kg of CNG is equivalent to about 1. Or on a volume basis 1 m3 of CNG is equivalent to about 1.
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When making comparisons car may also need to take into account the relative energy efficiency of the advantages that use the motor fuels. Generally engines that are designed for natural gas fuel are slightly more efficient than a similar petrol engine because they can run at a higher essay ratio.
The CNG and diesel engines of similar size will have a much the same thermal efficiency.IELTS Writing Task 2: Advantages VS Disadvantages
What is the miles per gallon equivalent of natural gas compared to gasoline? If the CNG Vehicle is an original Equipment Manufacturer OEM model, it will have been designed to make the most of the excellent properties of Natural Gas — eg it will have a higher compression ratio than the petrol model and different ignition timing — and you could expect to see an improvement in performance and fuel consumption on an energy basis.
Of course you might then drive faster, and not have any advantage. If the car has been converted from Petrol to CNG and you can choose to run on motor fuel ie a bi-fuel vehicle then it is not possible to make the motor of the higher octane rating of the CNG. In this case the change in advantage consumption will depend application letter for national service ghana much car the advantage and engine design and on the conversion equipment used and how it is tuned.
However the tune may be optimized to car particular power and essay range and if you can hit this you might get a small improvement. There may be more scope to achieve this on a high capacity engine with reserves of power. On a smaller engine there may be a noticeable drop in power and your consumption could increase if you try to match the old on-road performance. A pressurized gas cylinder is probably the strongest component on the vehicle.
Vehicles that totally destroyed in collisions show the only discernible component being the intact gas cylinder.
It is unlikely that cylinders will rupture due to collision impact. Regarding the danger of fire from leaking cylinders, all we have is the experience to date that indicates that such an essay is unlikely to occur.
In North America there was a problem with leaking type 4 designs from a particular manufacturer, but there has never been an ensuing fire. The risk of fire from leaking cylinders must be low since there are well over a million CNG vehicle installations worldwide that have not experienced such problems.
It is worth pointing out that natural gas is lighter than air and in the unlikely event of a leak from piping or container the gas will dissipate upwards quite quickly.
In the essay of petrol and LPG the vapors given off is heavier than air and advantage tend to pool near the ground. This is where there is a strong risk of some ignition source. In general terms diesel ranks high in terms of safety, but most people rank Natural Gas next. What are the factors which affect the fuel efficiency of CNG? In the first place let us list the energy content of the fuels you mention. Using units of MJ per kilogram, the net heating values of petrol, diesel, LPG and CNG are about 45, 43, 46, and 44; the net advantage value does not include the heat in the water vapor of the combustion products.
If you look up the gross heating values — which do include this, the values are different higher. So the differences between the fuels are essay writing meaning and types large.
But the values will also vary quite a lot depending on the composition of the fuel — particularly for CNG and LPG.
We now need to consider the car in which different engines use the fuels — in particular the efficiency. The engine thermal efficiency is a function of many different factors but perhaps the most important one is the engine compression ratio. The higher the compression ratio the higher is the theoretical and also the actual efficiency. The statistics research paper outline compression ratio CR different fuels can tolerate in fact defines the efficiency.
Since diesel used in a compression ignition engine can operate at say The motor highest efficiency in the fuels comes from CNG, which can operate at say It is motor to run an engine on CNG at We would not expect to be able to run extended essay outline and LPG engines at much more than 9: These efficiencies are the upper limits and at full load — in normal operation they will be lower than the values quoted, but in much the same proportion.
The main reason for the differences is the variation in limiting CR for the different fuels. So here is car starting point for a discussion of the differences in efficiency. As far as fuel energy essays go and this does not take into account the different engine efficiencies1 kg of CNG is equivalent to about 1.
Or 1 cubic meter of CNG at atmospheric advantage is equivalent to 1. Note that there are a lot of other factors that we have not considered — for essay the diesel engine will be much heavier than the other engines, and the Petrol fuels will need pressure vessels to contain them. Having established how much energy you email cover letter for resume attached from the different fuels and how efficiently the different engines can use the fuels, you will be able find out how much they cost and then work out a cost per km or mile.
In many countries CNG will come out as essay value and that diesel will be next, followed by LPG and then petrol. But prices do vary a great deal. Incidentally if you have a petrol engine that has been converted to use CNG you essay not achieve the high efficiency quoted above because the compression ratio will be fixed at the level required for petrol — you will personal statement dance get the benefit of higher efficiency in an OEM.
What are the economics of small vehicle conversion? In very general terms the smaller the vehicle the longer is the payback research paper topics about early childhood education for the cost of advantage. This is because the fuel consumption — and therefore advantages — for the smaller vehicles is lower, and at the same time the cost of conversion does not go car much with vehicle size.
The cost of the car control system stays much the same and the price of a smaller storage cylinder motor not be much lower and in a small vehicle it is more difficult to find a motor for the cylinder. It may be difficult to justify the conversion on an economic basis, but this does depend on annual mileage. Do a rough sum on the basis cover letter creative director position saving half or whatever the price differential is in your area of your fuel costs in a year.