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Energy

As I switch on my low energy light bulbs 5 mins before I need to use them and think of the 0.7% of UK energy consumption we will save when we all switch (calculations available for anybody that wants them). But I am also aware that when I bring my fiery Fiat Punto to a stop from 30mph at a traffic light I dissipate the same energy as a 100w lamp running for 15mins.

Oh Dear. Notably that's the energy I dissipate not what I actually use getting the car up to 30mph. Never mind because when I put my foot down it generates enough power to run 440 100watt light bulbs that's right 440. Its the car they should be looking at.


And then there is driving to the bottle bank! One website says you save as much as 1 hour of 100w bulb for every bottle you chuck in. Gee that's enough energy to slow down from 30mph 4 times.

  1. By the way the car isn't 100% efficient its probably 30% if your very lucky.
  2. Currently there is loads of glass nobody knows what to do with.
  3. Actually the energy to make a bottle is huge so it isn't really saving much. Re-use is the answer, like we used to have in the 1970s

And by the way this is all based on some very basic calculations, but can I find anything detailed anywhere.

No. Because governments are more interested in saving votes then energy. So if you got any good figures on all this I'd love to see them. No not the votes silly, the energy calculations. Yes I mean the full calculations, I've already seen the basic stats.

Politicians save votes, not energy! (Pre-Ramble)

If you just want to some fact, not my pre-ramble skip this.

A long long time ago, at the start of the industrial revolution they came up with a concept called energy, defined as the potential to do work. They also came up with a few basic mathematical ideas to go with it but they probably need not have bothered because right now we are undergoing a second energy revolution. One in which people and politicians who don't know the difference between energy and power are making decisions to try and save energy. Like trying to drive a car without really knowing the difference between the break and the accelerator.

Most sensible people who are not sure about something prefer not to do it. I buy excellent Italian ice cream on the the Charring Cross Road at the back of Leicester Square and I would not presume to tell the proprietor how to make ice cream and nor would I dare to sit on an ice cream standards committee.

Lets take a look at just one "great" energy saving idea! Low energy light bulbs, and what it will really save. Oh by the way "Carbon emissions from international aviation are currently excluded from UK and international carbon reduction targets. Due to the current and projected rise in passenger numbers, the sector is expected to become a major source of emissions in the future." Wikipedia

Appearance is Everything, Reality is Nothing!

Energy basics (If you need them)

If you are familiar with basic energy equations for potential and kinetic energy, then please skip this.

A long long time ago, at the start of the industrial revolution I think quite a few clever people came up with a concept called energy, defined as the potential to do work;

Energy (in Joules) = Force (in Newtons) x Distance (in Meters)

That just says;

The work done or energy = how hard you push x how far you go

That's kind of common sense, if you think of leaver it makes sense that work do at one end is the same as the work you get out at the other.

Now it also turns out that if you take a stationary object and push it with a certain Force through a certain Distance the energy you use to do it will send the object off at some Velocity. And the relation is;

Energy (in Joules) = 1/2 x Mass (in Kilogrammes) x Velocity x Velocity (in Meters per Second)

That just says;

The work done or energy = half x how heavy it is x how fast its going x how fast its going

These two equations are enough to work out a lot of things about energy and I shall use them soon.