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Gorski
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Platinum
CNG vehicles
Gorski   3/21/2014 2:18:46 PM
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If countries rich in oil will use natural gas and sell us their oil, what happens when we don't buy their oil because we don't need it?

Mydesign
User Rank
Platinum
Re: Natural gas and LPG
Mydesign   7/2/2013 3:24:30 AM
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"As I know LPG is  a outcome of the process of separating Petrol and Diesel from the crude oil. "

Pubudu, eventhough LPG is a bye product of crude oil, it's not an outcome during the process of separating Petrol and diesel. It has to pass through various process to becomes in gaseous state.

Mydesign
User Rank
Platinum
Re: Natural gas and LPG
Mydesign   7/2/2013 3:21:07 AM
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Bobjengr, thanks for your clarification. I think most of our readers may have same doubt, when reading an article with respect to natural gas/CNG/LPG. I hope the response from our various members will help them to clarify it.

Mydesign
User Rank
Platinum
Re: Smart readers
Mydesign   7/2/2013 3:17:00 AM
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"Thanks to the readers who checked in on the differences between liquefied petroleum gas and CNG. As I've said many times, if you don't know the answer to a technical question, someone here will. "

Charles, that's one of the advantage of community site. If we are googling with the same question, we can get some readymade answers from various websites; but won't be genuine or credible.

Charles Murray
User Rank
Blogger
Smart readers
Charles Murray   6/27/2013 7:05:38 PM
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Thanks to the readers who checked in on the differences between liquefied petroleum gas and CNG. As I've said many times, if you don't know the answer to a technical question, someone here will.  

bobjengr
User Rank
Platinum
Re: Natural gas and LPG
bobjengr   6/27/2013 6:35:04 PM
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Hello My Design--Basically, natural gas is methane.  Generally 84 to 90 % methane with a heating value ranging from 900 to 1200 Btu/Ft^ 3.   LPG is classified as propane or butane.  Propane has a heating value of approximately 2500 Btu/Ft^3 where as butane is 3500 Btu/Ft^3.  In climates experienced in the United States, butane is not that suitable for most usage.  Propane is the LPG of choice.  Hope this helps.

Pubudu
User Rank
Platinum
Re: Natural gas and LPG
Pubudu   6/27/2013 1:38:34 PM
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Charles, As I know LPG is  a outcome of the process of separating Petrol and Diesel from the crude oil. 

Mydesign
User Rank
Platinum
Re: Natural gas and LPG
Mydesign   6/27/2013 4:03:52 AM
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"Natural gas is essentially methane, whereas liquefied petroleum (propane and butane) is a hydrocarbon-based gas. It is used in automobiles, but its energy density is lower than that of gasoline, so its fuel consumption is higher."

Murray, thanks for the clarification and I think you are right.

Mydesign
User Rank
Platinum
Re: Natural gas
Mydesign   6/27/2013 4:01:24 AM
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"Many vehicles could be modified to run on natural gas. I have a friend who has traveled extensively in Asia and found lots of natural gas powered vehicles there. '

Naperlou, in our country, for a particular state all the public transport vehicles are using CNG (Compressed Natural Gas) and state government insisted all private vehicles to convert the mode of fuel as CNG. Federal government also has a plan to make it compulsory from 2016.

emerg.reanimator
User Rank
Iron
Re: The advantages and the logistics of CNG
emerg.reanimator   6/27/2013 3:37:45 AM
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Direct injection is an interesting concept that might work well with CNG since the pressure is quite high

LP gas is stored as a liquid at around 300PSI

 

The pressure for CNG in the tank is about 200 atm (14*200 = 2800 PSI).

Usuall pressure in engine is about 12-16 atm (160-260 PSI).

So I don't beleive that direct injection of CNG is practical. However make use of the higher pressure for gas enabled (LPG & CNG) vehicales could be the option.

The technical challenge in this case is how to combile the gas (higher pressure) and gasoline injection in single engine. Most of the cars has two tanks: one for usuall gasoline and another for CNG/LPG.

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