Re: FW: Re: Tesla Coil Efficiency Test

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Barton B. Anderson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <tesla123-at-pacbell-dot-net>

Hi John,

Can you do me a favor and write up the test procedure for the lamp test in
detail and send here or
offlist (whichever you prefer). I'll make the measurements.

Take care,
Bart

Tesla list wrote:

> Original poster: "John H. Couture by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>
>
> Bart -
>
> The reason the Hi-Voltage Lab, University, and Commercial coilers avoid the
> TC efficiency issue is because there is not a good reason for building TC's
> like going to the moon so there will not be millions of dollars available
> for TC research.
>
> I do not agree that TC efficiency is subjective if tests like the lamp tests
> are used. For these tests you only have to be able to read meters correctly
> and that can be objective. However, there are a lot of problems when spark
> outputs are used and this can be subjective. This is why there is no
> agreement on this method amongst coilers. However, there is agreement on the
> definition of TC efficiency. It is
>       TC eff = energy out/energy in
>
> Why not utilize the TC data we already have available to come up with a
> resonable approach to TC efficiency. We can then verify this procedure with
> additional testing. Our tests to date indicate that a well designed TC will
> give a range of sparks 1 to 40 ft with a 200 watt to 48000 watt input. With
> this start we can use this equation.
>      Spark output ft = (watt in)^.67/34.8
>
> With these spark outputs we can then find the range of
> watts in/ft of spark. This gives us a range of about 200 to 1200 watts/ft of
> spark for the 200 to 48000 watts input. With this information we can then
> estimate the TC efficiency. We can start with this equation
>       TC eff = 7.1/sqrt(watt in/ft spark)
>
> The current in the spark channel increases as the watts input increases and
> this equation allows for this current increase. This equation may have to be
> changed to agree with new tests.
>
> Note that I do not use bps. The equations above refer to total watts per sec
> or energy per second which is needed to find the TC efficiency. Divide the
> total watts per second by bps to find the energy in each break. Things like
> air density, etc, are not involved with the lamp tests. However, these are
> details of the spark tests that would require the spark data to be converted
> to standard conditions. These details would probably change the data by
> negligible ammounts for our purposes.
>
> Keep in mind that this all comes from test data we have already obtained
> except for the estimated efficiency. All we have to do now is to verify the
> above by additional tests like the lamp test. The List will then have made
> more progress towards finding the TC efficiency than any other person or
> organization?
>
> John Couture