Staying Safe In Manchester.....
ChatterBank1 min ago
No best answer has yet been selected by bibacux2001. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.1L of LPG = Whatever-sized-container-you-decide-to-put-it-in cm� of Petroleum Gas.
In other words, a gas expands to fill a (rigid) vessel completely.
LPG is only a liquid because it is under pressure. Release the pressure and it will turn to gas. The liquid in a cigarette lighter is usually butane (technically an LPG) - when you press the valve, a small stream of liquid butane turns to gaseous butane as it decompresses - (the flint ignites it at the same time to create a flame.)
If you allowed a liquified gas to expand into a non-rigid vessel (eg. a balloon), the liquid would turn into a gas and expand until the pressure exerted by the gas equals the contracting pressure exerted by the elastic skin of the balloon. This volume you can measure - however, it varies with temperature......For example, a ballon of a fixed volume of gas will have, say, a volume of 1L (1000cm�) at 21�C, but will be less for the same mass of gas at 2�C (in other words, the gas contracts at lower temperatures, assuming the pressure remains the same.
If you Google 'Charles' Law' and 'Boyles Law' you will hopefully see the relationship between volume, pressure and temperature of gases - and if you are feeling adventurous - try 'saturated vapour pressure' to see the effect of gas/liquid phase systems.
If you are trying to get a cost comparison for lpg then even knowing the equivalent in gas volume to town gas is not going to help because they have a different calorific value. It also bares no relation to oil per litre.
I used to work this out for heating systems when oil was much cheaper. Oil was cheapest, then town gas, solid fuel, electricity and LPG by twice as much as oil.
I would guess that the order now is town gas, solid fuel, oil, electricity and LPG probably by a considerable amount as it is related to oil prices unless demand is low.