GPL: latest news

[Woodcutter]

Prof, do you have any information on the variability in the composition of LPG and, by extension, if it can have a significant influence on pollutant emissions?

For my part, the only variation I could see is the propane / butane ratio, which can vary from country to country.

Are there any standards for setting this ratio to a "national" distribution level?

[professeur31]

Prof, do you have any information on the variability in the composition of LPG and, by extension, if it can have a significant influence on pollutant emissions?

For my part, the only variation I could see is the propane / butane ratio, which can vary from country to country.

Are there any standards for setting this ratio to a "national" distribution level?

I will see what I can find as information and I will communicate it if I find it.
For having carried out tests and measurements in pure butane then in pure propane and finally in LPG, I think that the influence of the ratio is negligible because I did not see any significant difference concerning the pollutants emitted in the 3 cases.
For the standards, I will check because I know that this ratio is well defined; this does not necessarily imply normalization.
Your question is very interesting from the technical point of view, I take care of it.

a ++

[Woodcutter]

Well, I found that: FAQ Primagaz.
Apparently in France, it's 50 / 50.

[professeur31]

Well, I found that: FAQ Primagaz.
Apparently in France, it's 50 / 50.

Mashed + faster than me the lumberjack !!
Effectively, I just found it is 50 / 50.
Go to a little woods school:
Do you know the additional fuel consumption factor in LPG compared to gasoline?
It will not please our friend paedolien

LOLLLLLLLLLLLLLLLL

[professeur31]

I am helping you:
conso factor sup = Gasoline PCI: PCI GPL.

That's where it hurts !!!!

hihihihihi.

[Woodcutter]

I am helping you:
conso factor sup = Gasoline PCI: PCI GPL.

That's where it hurts !!!!

hihihihihi.

Oue but the PCI is expressed en masse while the conso is expressed in liters, that's where it stuck ...

The density of LPG is about 0,55 I think, right?

By cons I have not found anything on the standard EN589 ... I do not know if on Legifrance or sites like that we can find information of this type ...

[professeur31]

I am helping you:
conso factor sup = Gasoline PCI: PCI GPL.

That's where it hurts !!!!

hihihihihi.

Oue but the PCI is expressed en masse while the conso is expressed in liters, that's where it stuck ...

The density of LPG is about 0,55 I think, right?

By cons I have not found anything on the standard EN589 ... I do not know if on Legifrance or sites like that we can find information of this type ...

ok then we will take the combustion values ​​in MJ / l
for gasoline it is 32.7 and for GPL 25.1.
so 32.7 / 25.1 = 1.30 !!! it is really that in reality, I found it !!!
In reality the overhead of conso is between 23 and 30% compared to gasoline and this is a function of the settings.

For the EN589, I have nothing, I will continue to search.

Petrol density = 0.750 and GPL = 0.546.

[I Citro]

MOUAIS ...
I do not quite agree with this simplistic approach;
PCS, MJ / L, Density ...

In fact it is necessary to synthesize all the characteristics of 2 fuels.
I did (some time ago) a work of comparison between the different fuels.
The density: 0.555 kg / l of lpg and 0.75kg / l of sp95 does not have much interest (except when I fill my bottles of butane with lpg, to check that the pump does not rob me ) I weigh my gas and I check that the volume in liter corresponds to its weight.
The PCS alone is not explicit, it is rather PCS / PCI report
MJ / l or Kwh / l are not exact refflets for performance differences between 2 fuels.
The actual difference is closer to 20% than 30% announced above!

Indeed, the rate of combustion, the speed of the flame front and many other parameters such as the ability to form a gaseous mixture (air / fuel) homogeneous ...

In general, it is easier to have "complete" lpg combustion than for gasoline which is characterized by high levels of unburned hydrocarbons (% HC). oil of gasoline cars (on a lpg the oil remains clean) as well as the exhausts.

All these beautiful figures are obtained in test tubes of the lab, on engines in operation, it is a very different affair ...

[neant]

In Bucheron theory, if you want to find the norms, you have to get out of your wallet, because a norm is bought.

Bucheron, I'm intelectually limited, but I'm not wasting my time looking for a standard, intellectually, I know you have to buy it. And as financially, I am limited ...
well, I do not know what a fuel is made of, mouhahahahaha
Note, it would serve me nothing, I could intelligently not understand the composition being intelectuellement limited.

What I like the irony with you, Bucheron, you are a perfect toy, in addition, you make spell check, better than google !!!

[neant]

But what I love above all Bucheron, and it is also valid for Professor, is that suddenly, you start to ask questions that you did not ask before.

Gender "Does the composition of a fuel directly affect its combustion, on emissions of pollution?"

I think it's a good question to start a serious study. no?

(limited intelectually, eh Bucheron!)

Here, I allow myself to make an affirmation. there are LPGs, diesels, and species that pollute less than others.
But behind that, by reasoning like a bell, mouahahaha, I ask myself questions, where do the fuels that pollute the least, or the most, come from?
And which process is best able to provide a less polluting or smoother fuel?
And also, what is the most stable process in production series?

grrr c relou the quality !!!