| Note the Kh 7.2
number on the tag in the photo above. This says that the wheel takes 3600/72 or 50
seconds to make a complete rotation, when the house is drawing one kilowatt of power.
Using a stopwatch, you can measure how much power your house is drawing from the utility
grid. First, measure the time (T) it takes for the wheel to make one rotation.
Take that number and insert it into the equation below.
Power = 3600/72 X 1/T
As an example, suppose you measured 7.5 seconds for the
wheel to make one rotation. Then, using the equation, you would be drawing 6.7 kilowatts
of power. |
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