Natural gas as road fuel?
Discussion
Yes I was sat in a jam... Bored but thinking. Why can't we charge a gas tank in the car from a gas tap at home? The same as LPG but natural gas. Some sort of compressor could be tapped in to, to push the gas into a high pressure cylinder. I understand the tax implications need to be met but any technical reason why this may be a wacky idea???
Already done in Germany and many other countries across the world
http://en.m.wikipedia.org/wiki/Compressed_natural_...
http://en.m.wikipedia.org/wiki/Compressed_natural_...
BFG TERRANO said:
How does tax work? Do users have to meter how much is used as road fuel?
Yep, it'll all be documented.I've got a 1200l LPG tank in my back garden. I can't use it for road fuel, legally, because it's not duty paid. But I can't fill the LPG tank on my camper from it, either, despite the fact that only powers the fridge and cooker - I have to buy road-use taxed LPG for that... <mutter>
TooMany2cvs said:
Yep, it'll all be documented.
I've got a 1200l LPG tank in my back garden. I can't use it for road fuel, legally, because it's not duty paid. But I can't fill the LPG tank on my camper from it, either, despite the fact that only powers the fridge and cooker - I have to buy road-use taxed LPG for that... <mutter>
Do you mean you physically can't fill it, or because you're a model citizen?I've got a 1200l LPG tank in my back garden. I can't use it for road fuel, legally, because it's not duty paid. But I can't fill the LPG tank on my camper from it, either, despite the fact that only powers the fridge and cooker - I have to buy road-use taxed LPG for that... <mutter>
Scuffers said:
Indeed.
It's not very cheap to get a CNG rig put in at home, and there are some reasonably strict regulations around where the tank can be sited.
CNG isn't LPG so the car would have to be specifically converted for CNG, you can't just stick CNG in an LPG car.
LPG is generally the easier option for most people which is why CNG conversions are so rare.
As others have said though CNG is used in some applications.
CNG isn't LPG so the car would have to be specifically converted for CNG, you can't just stick CNG in an LPG car.
LPG is generally the easier option for most people which is why CNG conversions are so rare.
As others have said though CNG is used in some applications.
Main issue is that CNG needs to be stored at very high pressure as already pointed out, yes you can but again repeating others, LPG is easier for this reason.
LPG is (from memory) liquid at around 120psi so you have a great energy density whereas CNG remains a gas at normal temperatures.
So you have very thick very heavy and rather slim vessels to store the gas, think of welder's acetylene cylinders.
LPG is (from memory) liquid at around 120psi so you have a great energy density whereas CNG remains a gas at normal temperatures.
So you have very thick very heavy and rather slim vessels to store the gas, think of welder's acetylene cylinders.
996TT02 said:
Main issue is that CNG needs to be stored at very high pressure as already pointed out, yes you can but again repeating others, LPG is easier for this reason.
LPG is (from memory) liquid at around 120psi so you have a great energy density whereas CNG remains a gas at normal temperatures.
So you have very thick very heavy and rather slim vessels to store the gas, think of welder's acetylene cylinders.
Exactly, LNG is preferable, but expencive from a storage point of view (although becoming more popular with the increase in fracking.)LPG is (from memory) liquid at around 120psi so you have a great energy density whereas CNG remains a gas at normal temperatures.
So you have very thick very heavy and rather slim vessels to store the gas, think of welder's acetylene cylinders.
http://en.wikipedia.org/wiki/Liquefied_natural_gas
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