[Greenbuilding] Energy Numbers

[Joe Killian]

    If the nuts & sucrose & other hydrocarbons in the candybar are 
oxidized (burnt), they release this much energy.  It's how much energy 
is available from the candy bar using chemical reactions.  It's what our 
bodies use as an energy source.
   Shows how efficient animal metabolism is.  We all know intuitively 
that burning a candybar in any man-made vehicle (even one of 120 pounds) 
would nowhere near move that machine the 7 miles or so the woman would 
travel in the hour.
   I remember in high school (too many years ago to count) the class 
being led through calculating how many pullups the energy in a sugar 
cube would supply energy for.  I don't remember the number, but it was 
quite a few.  There's a lot of room to make our machines a lot more 
efficient than they currently are.

   Joe


On 7/15/2012 8:10 AM, Reuben Deumling wrote:
> This comparison I didn't understand:
>
> Explosion of 1 kg of TNT 10e6 Joules
> Woman running for 1 hr  10e6 Joules
> Candy bar                       10e6 Joules
>
> I'd like to know a little more about how these numbers are calculated. 
> Presumably in the case of TNT it is energy released; in the case of 
> the woman it is expended, but in the case of the candy bar I'm not 
> sure - contained in the nuts and sucrose? Seems kind of gimmicky.
>
> On Sun, Jul 15, 2012 at 7:51 AM, Gennaro Brooks-Church - Eco Brooklyn 
> <info at ecobrooklyn.com <mailto:info at ecobrooklyn.com>> wrote:
>
>     Here is an interesting breakdown of different energy amounts:
>     http://www.ocean.washington.edu/courses/envir215/energynumbers.pdf
>     For example the energy content of a candy bar vs. a pound of coal.
>
>
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