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The Size of Items Purchased

When ever you buy something there is a process which goes through your mind?

You assesses

  1. A need for an item
  2. The size to do the biggest job you can think off
  3. The price of that item
  4. Can you afford this item
  5. Should I get the next size up just in case because you can afford it.

The result

Probably purchased an item too big for the job , but “no worries it will be OK”

Based on your financial position this is how it works or, someone else has or has seen one this size and you get one this size or perhaps bigger.

The fact that size seems unimportant to a world that has everything, no one stops to think about the consequences.

Any well designed object runs at its best efficiency at full load. (Note ! the percentages are for illustration only).

  1. The 1% of the  time it is used at full load efficiency =============       99%      say
  2. 9% of the  time it is used at ¾ full load efficiency =============         80%
  3. 60% of the  time it is used at1/2 full load efficiency = ===========        75%
  4. Remaining 30% of the time it is used at 1/4full load efficiency ==== =      60%

From these estimates  it runs at 74%  throughout  it’s life or 26% of waste

This is because we could not purchase one item to suit all the load applications. – the ideal is a variable item which maintains the high efficiency for any load.

A device to do this was conceived to make electric motors vary in speed – for example refrigeration, electric drills. The result a large increase in efficiency say 25% minus losses 10% due to heat loss in the controller .

These losses appear over probably 10 major items per family in Australia

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