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Fast E.V. Charging.

https://www.dailymail.co.uk/sciencetech/article-6892099/New-ultra-fast-pumps-charge-electric-car-minutes-theres-battery-handle-it.html

Z.
Parents
  • Dave,

    I agree with some of what you say but there are definate benefits in moving the combustion away from certain areas such as inner cities and mountain passes. Some of the reductions can be made with rail and tramways but there will always be a need for transport away from the tracks. I do think that your doubling of the infrastructure is excessive. I did some calculations for Germany, looking at the amount of oil and petrol consumed and calculating the electrical equivalent. This ended up with around a 30% increase in electricity consumption. The calculations are here:
    First step how much petrol and diesel is currently used?
    From the IEA
    www.iea.org/.../GermanyOSS.pdf
    Germany petrol and diesel consumption 2010-2011.
    Petrol 450 000 barrels per day
    Diesel 1050 000 barrels per day
    As a cross check on the total consumption:
    world.bymap.org/OilConsumption.html
    Total consumption petroleum consumption for Germany 2015
    2 372 000 barrels per day
    Next step what is the electrical energy equivalent of 1 barrel of Petrol/Diesel? From a couple of sources:
    peakoil.com/.../how-much-energy-is-there-in-a-barrel-of-oil
    1 barrel (crude) is 1,700 kilowatt hours 
    letthesunwork.com/.../barrelofenergy.htm
    A barrel of oil contains about six gigajoules of energy. That’s six billion joules or 1667 kilowatt-hours
    If we take 1.7 MWh per barrel for petrol annual automotive energy input is:
    Petrol 765 000 MWh per day= 765 GWh per day = 279 000 GWh = 279 TWh
    Assuming an efficiency of 20% for a petrol vehicle the energy required for petrol automotive use in Germany is 55.8 TWh per year.
    Taking an overall efficiency for an electric vehicle to be 80% (electricity transmission losses, battery charging efficiency) replacing the petrol vehicles with electric vehicles would require 70 TWh per year.
    What proportion of the diesel is for automotive use against road or rail transport is not obvious. Suggesting a total of 100TWh for the annual automotive consumption seems reasonable.
    If all the diesel consumers were replaced by electric vehicles the annual electricity consumption would increase by around 220 TWh per year
     Currently Germany produces around 600 TWh of electricity annually.
    www.cleanenergywire.org/.../germanys-energy-consumption-and-power-mix-charts
     Increasing this to 700 TWH to allow for the charging of electric cars is not trivial, nor is the reinforcement of the distribution infrastructure. Increasing to 820 TWh to replace all fossil fuelled transport will require significant time.

    Germany currently has it's own unique problems with the phasing out of nuclear power and the misguided dash for renewables but that's another issue.

    Best regards

    Roger


Reply
  • Dave,

    I agree with some of what you say but there are definate benefits in moving the combustion away from certain areas such as inner cities and mountain passes. Some of the reductions can be made with rail and tramways but there will always be a need for transport away from the tracks. I do think that your doubling of the infrastructure is excessive. I did some calculations for Germany, looking at the amount of oil and petrol consumed and calculating the electrical equivalent. This ended up with around a 30% increase in electricity consumption. The calculations are here:
    First step how much petrol and diesel is currently used?
    From the IEA
    www.iea.org/.../GermanyOSS.pdf
    Germany petrol and diesel consumption 2010-2011.
    Petrol 450 000 barrels per day
    Diesel 1050 000 barrels per day
    As a cross check on the total consumption:
    world.bymap.org/OilConsumption.html
    Total consumption petroleum consumption for Germany 2015
    2 372 000 barrels per day
    Next step what is the electrical energy equivalent of 1 barrel of Petrol/Diesel? From a couple of sources:
    peakoil.com/.../how-much-energy-is-there-in-a-barrel-of-oil
    1 barrel (crude) is 1,700 kilowatt hours 
    letthesunwork.com/.../barrelofenergy.htm
    A barrel of oil contains about six gigajoules of energy. That’s six billion joules or 1667 kilowatt-hours
    If we take 1.7 MWh per barrel for petrol annual automotive energy input is:
    Petrol 765 000 MWh per day= 765 GWh per day = 279 000 GWh = 279 TWh
    Assuming an efficiency of 20% for a petrol vehicle the energy required for petrol automotive use in Germany is 55.8 TWh per year.
    Taking an overall efficiency for an electric vehicle to be 80% (electricity transmission losses, battery charging efficiency) replacing the petrol vehicles with electric vehicles would require 70 TWh per year.
    What proportion of the diesel is for automotive use against road or rail transport is not obvious. Suggesting a total of 100TWh for the annual automotive consumption seems reasonable.
    If all the diesel consumers were replaced by electric vehicles the annual electricity consumption would increase by around 220 TWh per year
     Currently Germany produces around 600 TWh of electricity annually.
    www.cleanenergywire.org/.../germanys-energy-consumption-and-power-mix-charts
     Increasing this to 700 TWH to allow for the charging of electric cars is not trivial, nor is the reinforcement of the distribution infrastructure. Increasing to 820 TWh to replace all fossil fuelled transport will require significant time.

    Germany currently has it's own unique problems with the phasing out of nuclear power and the misguided dash for renewables but that's another issue.

    Best regards

    Roger


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