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Conversion Rate

  • 20-04-2010 08:42PM
    #1
    Pembily
    Registered Users, Registered Users 2 Posts: 14,404 ✭✭✭✭


    Hi, I have to convert Litres to kWh, I have found a conversion rate for Oil but the gas is saying depends on location, anyone have any ideas??

    Thanks


Comments

  • #2
    mawk
    Registered Users, Registered Users 2 Posts: 2,738 ✭✭✭mawk


    uuuuh.. thats kind of like asking how many miles there are to the ton.

    well if you want to find out the stored energy in a material, what you want to read up on is the calorific value. work out the mass by getting the litre value and the density. multiply the number of kilograms of the fuel by the calorific value to get the energy of the fuel. this will probably be in the 50-80Mj range for one kilo of methane iirc.

    to get that back into kwh divide the energy by 3'600'000 (3600seconds by 1000 to get Kw/hr)


  • #3
    spideog7
    Registered Users, Registered Users 2 Posts: 1,230 ✭✭✭spideog7


    And don't forget the efficiency (or lack thereof) of the converter (boiler/turbine etc.).


  • #4
    bnt
    Registered Users, Registered Users 2 Posts: 13,138 ✭✭✭✭bnt


    Litres is a measure of volume, but when it comes to gas, the volume depends on the temperature and pressure. If we assume that we're talking about standard temperature and pressure conditions, then the Wikipedia article on natural gas tells me that "The gross heat of combustion of one cubic meter of commercial quality natural gas is around 39 megajoules (≈10.8 kWh), but this can vary by several percent."

    A cubic metre = 1000 litres, so 1 litre ≈ 0.0108 kWh.

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  • #5
    Pembily
    Registered Users, Registered Users 2 Posts: 14,404 ✭✭✭✭Pembily


    bnt wrote: »
    Litres is a measure of volume, but when it comes to gas, the volume depends on the temperature and pressure. If we assume that we're talking about standard temperature and pressure conditions, then the Wikipedia article on natural gas tells me that "The gross heat of combustion of one cubic meter of commercial quality natural gas is around 39 megajoules (≈10.8 kWh), but this can vary by several percent."

    A cubic metre = 1000 litres, so 1 litre ≈ 0.0108 kWh.


    Thanks a million!!! :)


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