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How much energy does it take to make a cup of tea?

August 20, 2014 Benjamin Gray

Dr Matt Little sometimes works with us on projects at phenoptix and does some really very interesting work with the rest of his time. He has a great blog where I just spotted this post:

"Its very difficult to explain the concepts of power and energy. People often ask me "Can I power my kettle with that?".

So to try and put the energy in a cup of tea into perspective I built the 'Cuppa-meter'.

The 'Cuppa-meter' shows a cup of tea which lights up as the energy required for a cup of tea is generated. This can be plugged into a pedal generator and people can 'feel' the energy required to make a cup of tea.

They can either pedal slowly (and hence low power) for a long time, or they can pedal hard (high power) for a shorter time. The end result (the energy) is the same - a nice hot cup of tea (or rather a lit up image of one).

This post gives a few images of the cup of tea and also the calculations used."




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