Apparent C.O.P. of 1.413469133935024 ...

[TinselKoala]

Hi.

My latest test results :

INPUT VOLTAGE : 18.03 VDC

INPUT CURRENT : 0.15 A

INPUT WATTS  = V*I = 18.03*0.15 = 2.7045 W


LOAD : 220 Ohms


OUTPUT VOLTAGE : 29 VDC

OUTPUT CURRENT : V/R = 29/220 = 0.1318181818181818 A

OUTPUT WATTS = V*I = 29*0.1318181818181818 = 3.822727272727273 W


APPARENT C.O.P. = 3.822727272727273/2.7045 = 1.413469133935024

I have a call-out to attend to, when i get back this evening i will try to self-run.


Thanks,

Gary.

Before we go much further, let me please point out to you that when you say:

APPARENT C.O.P. = 3.822727272727273/2.7045 = 1.413469133935024

You are saying it is NOT 1.413469133935025 and NOT 1.413469133935023...that is, you are giving ridiculous precision that you in no way can support with actual measurements.

Please let me remind everyone that your final answer CANNOT POSSIBLY be more precise than your LEAST PRECISE measurement.

That is, in the above experiment, DeepCut, you have measured your input voltage and current to 2 decimal places. This means your intermediate results and your final answers cannot be more than 2 decimal places in precision --- even assuming that your input data is correct in the first place. (Have you calibrated your meters?)

Please, quoting precision to all the digits that your calculator spits out only assures you of 2 things: 1) that you are wrong (that is, the true value is certainly NOT 1.413469133935024), and 2) people like me, who do this stuff for a living, pay less attention to you because we know your numbers aren't credible.

Now, if you like, we can address the issue of your apparent COP of ABOUT 1.41. First, though, perhaps you would like to check up on the difficulties associated with power measurements in oscillating circuits, particularly using consumer-grade DMMs.

For an example, I have a device here that draws 5 to 8 amps at 120VAC from the wall, and produces over 250 kV with a continuous plasma arc that can carry well over that 9 amps. Using your method of simple calculation of COP, what do I get? Does it mean I've made free energy?
Maybe...
http://www.youtube.com/watch?v=PdOhIoA1Z-k&feature=related

[DeepCut]

@Omnibus

Hi Omni, you haven't missed it, just forgotten a previous discussion we had

Here's  a process-list :

1. 18 VDC PSU powering a Bedini-circuit.
2. Bedini circuit linked to the usual bifilar-wound 'drive' coil.
3. A small iron rod inside the drive coil.
4. A diametrically-magnetised cylinder magnet mounted horizontally above the drive coil on a carbon-rod axle.
5. An output coil consisting of 1.15 kilometres of 0.25mm copper magnet wire, this coil is on a separate former that is larger than the drive coil's former and so can be placed around the drive coil.

I suppose it's a pulse-driven induction generator, here are some pictures, please excuse the mess :

http://qvision.pwp.blueyonder.co.uk/pic1.JPG

http://qvision.pwp.blueyonder.co.uk/pic2.JPG

http://qvision.pwp.blueyonder.co.uk/pic3.JPG

My new analogue meter should arrive tomorrow or Thursday then i can measure the current directly also.


Thanks,

Gary.

[DeepCut]

Hi Tinsel.

Yes, please excuse my ignorance and shoddy methods, i am learning all the time.

Where i have used only a couple of decimal places is because there was constant variance (!) and i took an average.

*EDIT* and my PSU only goes up to 2 decimal places. *EDIT**

I hope to get a scope next year and to grow into a more mature experimenter.


Thanks,

Gary.

[TinselKoala]

Keep up the work, Gary, and don't worry about it. And especially don't let it get you down.
There's a lot to learn, electronics wise, and I'm just a chapter or two ahead of you. I suffer from a traditional education, though, and I even see the merits of a lot of it, so if I get a bit pedantic about things like significant digits and power measurements...well, just consider the source, take what you need and leave the rest.

I'd like to see the circuit you are working with, and I know others would too.

cheers--
--TK

(Often, believe it or not, a good ANALOG meter like the legendary Simpson can give you a better reading (that is, a more honest and stable average) than a typical DMM on spiky oscillating signals. If you can find one surplus, it's a great piece of kit for the FE experimenter. Of course, a fast oscilloscope is even better, but more costly and has a steeper learning curve...)

EDIT to add: OK, I see the description. Thanks ! Good luck.

[DeepCut]

Thanks TK.

I think you're probably a few kilos of volumes, rather than chapters, ahead of me !

I suffer from a lack of education, sometimes that has it's merits ;+}

The circuit is the standard SSG circuit, in the black box in the pictures i posted a couple of posts above this one.

I ordered this today :

http://www.rmcybernetics.com/files/pdf/PWM-OCXI.pdf

So i'll probably be offending your electronic sensibilities with some ridiculous coil-pulsing-related posts in the very near future.


Thanks,

Gary.