Re: Tesla Coil Efficiency Test

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

Original poster: "rheidlebaugh by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rheidlebaugh-at-zialink-dot-com>

John: I beleave if you use a remote reading thermometer gun to read the
temprature of the light bulb you could get a good repeatable measurement
safely. The temprature guns read the Infra red light not visable , but are
the same action with a well designed narrow field of view and calibrated.
  Robert  H

> From: "Tesla list" <tesla-at-pupman-dot-com>
> Date: Thu, 04 Jul 2002 12:54:02 -0600
> To: tesla-at-pupman-dot-com
> Subject: Re: FW: Re: Tesla Coil Efficiency Test
> Resent-From: tesla-at-pupman-dot-com
> Resent-Date: Thu, 4 Jul 2002 13:02:46 -0600
> 
> 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
> 
> 
> 
>