Claimed OU circuit of Rosemary Ainslie

[MileHigh]

.99:

I would just measure at the center of the shaft.  I think that it is reasonable to assume that every point on the resistor could be used as a reference for the delta-temp measurements.  The center of the resistor is the center of the thermal mass which would imply that that point acts as the smoothest low pass filter for the power dissipation, but that is really splitting hairs.  Every point on the resistor body still smooths out the varying heat power into a constant temperature, as long as you keep measuring at the same point.  You could also lower the angle of the shaft if you wanted to slow down the moving column of air which should even out the temperature more.

MileHigh

[fuzzytomcat]

Hi everyone,

Here is a video link for the posting at Energetic Forum by Harvey http://www.energeticforum.com/70123-post2902.html on exactly how the data was compiled from the 40µs_520V_10_05_09_.xlr  excel spread sheet file

http://rapidshare.com/files/289473647/40us_520V_10_05_09_.xlr

http://www.youtube.com/watch?v=xy3R2q7pNcM

Thanks Harvey !!

Fuzzy 

[Hoppy]

Hi everyone,

Here is a video link for the posting at Energetic Forum by Harvey http://www.energeticforum.com/70123-post2902.html on exactly how the data was compiled from the 40µs_520V_10_05_09_.xlr  excel spread sheet file

http://rapidshare.com/files/289473647/40us_520V_10_05_09_.xlr

http://www.youtube.com/watch?v=xy3R2q7pNcM

Thanks Harvey !!

Fuzzy 

Something to be aware of when inductive discharge current is fed back to a LA battery in this type of circuit setup is that even light battery loading can cause the terminal voltage to drop very slowly, stay steady, or even rise for a period of time whilst the internal resistance of the battery adjusts to the load, depending on the state of charge. The computated supplied power / energy measurements could therefore be misleading when based on battery voltage readings.

The problems in using battery voltage measurements for calculating very accurate power / energy consumption was well discussed in the early days of this project, where I think it was generally acknowleged that battery terminal voltage changes is a poor indicator of energy removed from a battery.

Hoppy

[poynt99]

MH,

I guess we will have to wait and see if/how Rose and Fuzzy weigh in on this. Obviously it will substantially affect their results too.

I think mounting the resistor horizontal still may be an option worth looking at. That way we should be able to take a measurement anywhere along the top and it should not vary much.

.99

[poynt99]

The inductor current changes direction every half cycle as part of the natural ringdown process.

The positive and negative excursions of ringdown current largely cancel each other. Even so, the net mean current should still fall out of the sampled data, so it would seem there is something amiss.

Taking the mean value of the source's current provides a true picture of power draw from the source when combined with the source voltage.

.99