Noise Filter
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| Motor noise filter. |
I added three ceramic capacitors across the hair dryer motor and the
USB motor noise interference is gone. The following link was very helpful:
I heated the engine up to 80ºC and the engine is not quite
self sustaining. I can tell that I am close. One problem is that the cold side
of the engine warms about 10ºC for every five minutes of use. By the time the hot
side has warmed to 80ºC, the cold side is at 35ºC. Without active cooling I can
only get, at maximum, a 45ºC temperature gradient for a few minutes. The engine was designed to run on a 60ºC temperature difference and that 15ºC is sorely missed. Power of these engines seems to increase exponentially as the temperature gradient increases.The whole challenge of this experiment was to see if usable work could be extracted from a low temperature gradient. I must start thinking about installing water cooled tubing.
I am going ahead with the building of Jackrabbit’s
second engine. The second engine’s power stroke is offset from the first
engine’s by 90 degrees. The combination should supply continuous torque to the
flywheel, through the entire engine cycle. I will experiment with adding a cooling
coil to the second bucket. If I have success, I will retrofit the first bucket
with a cooling coil.
We are thinking of
installing eight new windows in the front of the house. When I start working on
that, this engine project will have to be delayed.
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