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Calor Gas, Gas Left In Cylinder


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Tony W

 

I don't wish to seem too picky but - I always understood that the calorific value per kg of butane, was higher than that of propane (see Arc System post) but the post says "Multiply amount of gas remaining by calorific value ( butane 13. 7 kWh/Kg, propane 13. 9 kWh/Kg )".

 

Please could you clear this up.

 

Mike

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Tony W

 

I don't wish to seem too picky but - I always understood that the calorific value per kg of butane, was higher than that of propane (see Arc System post) but the post says "Multiply amount of gas remaining by calorific value ( butane 13. 7 kWh/Kg, propane 13. 9 kWh/Kg )".

 

Please could you clear this up.

 

Mike

5151[/snapback]

 

Please read post you refer to in its entirety - I only copied it there for reference - post originally posted by JonF.

 

Me, I weigh the bottle on scales or give it a shake. You'll soon know then if it is getting empty.

 

This thread is duplicating one already on the board and will be deleted in 24 hours.

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Sorry Tony for reopening the topic but this confused me also. I know butane has a higher calorific value than propane. Now just a thought, are we talking about the new regulators on the new vans? And is this calorific value through the single regulator? I do not know it is just a thought. Now I have got this off my chest I will leave the topic open until Tony deletes.

 

Regards

Pete

PS I give mine a shake as well Tony LOL!!!!!!

Volvo
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Get a automatic change over valve if it is such a Worry then who cares how much is left in it it is not that much of a hard ship if it runs out is it as long as you have got a Spare

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Get a automatic change over valve if it is such a Worry  then who cares how much is left in it it is not that much of a hard ship if it runs out is it as long as you have got a Spare

5221[/snapback]

 

 

But surely if you have an automatic changeover valve and the gas runs out, you're stuffed as the second cylinder will now be empty!

 

Mlamont

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But surely if you have an automatic changeover valve and the gas runs out, you're stuffed as the second cylinder will now be empty!

 

Mlamont

5222[/snapback]

 

If you got the other cylinder filled when it ran out or as soon as you can you do not have to run out any more do you it is not as if you are using a bottle of gas a day

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Sorry Tony for reopening the topic but this confused me also. I know butane has a higher calorific value than propane. Now just a thought, are we talking about the new regulators on the new vans? And is this calorific value through the single regulator? I do not know it is just a thought.   Now I have got this off my chest I will leave the topic open until Tony deletes.

 

Regards

Pete

PS I give mine a shake as well Tony LOL!!!!!!

5210[/snapback]

 

Pete

 

That's what confused me. But it's PROPANE that has the higher calorific value weight for weight. Gary gave a complete explanation before on why butane is cheaper to use but, after a long discussion we have decided that it's not. The calorific value varies dependent upon whether you measure it by weight or volume. We now think that the cost of boiling 500 kettles of water is the same, regardless of whether you use butane or propane (using Calor's pricing) but would like this confirming (with a full explanation).

 

Tony

 

Please don't delete this yet, I really would like to know the full answer.

 

Mike

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Sorry Tony for reopening the topic but this confused me also. I know butane has a higher calorific value than propane. Now just a thought, are we talking about the new regulators on the new vans? And is this calorific value through the single regulator? I do not know it is just a thought.   Now I have got this off my chest I will leave the topic open until Tony deletes.

 

Regards

Pete

PS I give mine a shake as well Tony LOL!!!!!!

5210[/snapback]

 

I got confused even more - I didn't even write the original. ..................

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Live life on the edge, carry a spare gas bottle and a spanner, :huh:

 

and worry about, were the next beers are coming from. :D

 

Paul

Paul B

. .......Mondeo Estate & Elddis Avanté 505 (Tobago)

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All right boys and girls, you asked for it:

 

Propane is lighter than Butane - average Butane 1. 7415 litres per Kg Propane 1. 992 litres per Kg. This means 7kg Butane gives 9. 9 litres 6 Kg Propane gives 11. 9 litres.

 

Calorific values:

Butane - 112. 9 (MJ/m3) dry

Propane - 86. 1 (MJ/m3) dry

This means you get a total of 1. 117 MJ from a 7Kg bottle of Butane and 1. 02 MJ from a 6Kg bottle of Propane. Nett result - Butane more economical if bottle prices are the same. Now, What prices are you paying. .........?

 

BTW Boiling point at atmospheric pressure Æ’C approx. -2 Butane -45 Propane

 

Try that one!!! :rolleyes:

 

Martin W

 

P. S. really looks like I know about these things but I picked up the info from the LPGA Association web site!!!

Discovery D3 HSE + Coachman VIP 575/4 2016

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All right boys and girls, you asked for it:

 

Propane is lighter than Butane - average Butane 1. 7415 litres per Kg Propane 1. 992 litres per Kg. This means 7kg Butane gives 9. 9 litres 6 Kg Propane gives 11. 9 litres.

 

Calorific values:

Butane - 112. 9 (MJ/m3) dry

Propane - 86. 1 (MJ/m3) dry

This means you get a total of 1. 117 MJ from a 7Kg bottle of Butane and 1. 02 MJ from a 6Kg bottle of Propane.

Martin W

5586[/snapback]

 

That's what I missed. .."Propane is lighter that Butane", BUT also Propane, (because it is lighter), gives off a greater volume of gas for the same amount of liquid. .I think??..

There is a lot more chemistry to this. .but the essential fact is. ..both 6 and 7kg bottles as our leader JonF states, "contain the same amount of usable energy"..near as damn it. ..Propane leads by a tiny fraction because the kg's have been rounded to the nearest whole number. ..and this would account for the price differential. ..we are paying for Kw's not weight

As I see it, it blows all of what I said about relative cost out of the water. ..and for that I apoligise. ..humbly :blush:

gary1s.gif

 

Arc Systems are specialist Carver caravan product repairers, committed to providing a comprehensive service as well as spare parts for these popular heaters.

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That's what I missed. .."Propane is lighter that Butane", BUT also Propane, (because it is lighter), gives off a greater volume of gas for the same amount of liquid. .I think??..

There is a lot more chemistry to this. .but the essential fact is. ..both 6 and 7kg  bottles as our leader JonF states, "contain the same amount of usable energy"..near as damn it. ..Propane leads by a tiny fraction because the kg's have been rounded to the nearest whole number. ..and this would account for the price differential. ..we are paying for Kw's not weight

As I see it, it blows all of what I said about relative cost out of the water. ..and for that I apoligise. ..humbly :blush:

5634[/snapback]

 

Yeah but!!!. My local garage sells a 7kg Calor butane for £9. 50 but don't do propane which I have to source elsewhere at £11. 75.

 

All things being equal, why do we use butane? There appears to be no advantage (using Calor RRPs) at all and would save juggling bottles in winter.

 

Mike

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