[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Nitrogen VS Compressed air quenching
Original poster: "June Heidlebaugh" <rheidlebaugh-at-desertgate-dot-com>
The presents of oxygen changes the arc voltage a great amount. Nitrogen or
any other gas has a known breakdown voltage. WHEN OXYGEN IS PRESENT THE
BREAKDOWN VOLTAGE BECOMES UN PREDICTABLE.
Robert H
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, May 03, 2004 8:16 AM
Subject: Re: Nitrogen VS Compressed air quenching
> Original poster: "Jim Lux" <jimlux-at-earthlink-dot-net>
>
>
> ----- Original Message -----
> From: "Tesla list" <tesla-at-pupman-dot-com>
> To: <tesla-at-pupman-dot-com>
> Sent: Sunday, May 02, 2004 3:42 PM
> Subject: Re: Nitrogen VS Compressed air quenching
>
>
> > Original poster: "john cooper" <tesla-at-tesla-coil-dot-com>
> >
> > I've added photos of my prototype nitrogen manifold to my website,
here's
> > the link:
> >
> > http://www.tesla-coil-dot-com/bipolar.htm
> >
> > They're at the bottom of that page. There's a photo of it installed in
> the
> > original cabinet and two close-ups of the manifold that I just took
> > today. For quenching ability the nitrogen is extremely effective while
> > compressed air is barely noticeable, apples and oranges. FWIW a 42
cubic
> > foot bottle costs about 14.00 to fill and lasts for two 8 to 10 minute
> > runs, the bottle and regulator were around 400.00
>
> I'll bet a 300 cu ft T sized bottle doesn't cost much more to fill. A few
> (<5) years back, I was paying around $16 for a T bottle of nitrogen. You
> don't need any exotic grade, of course.
>
>
> I wonder why there's such a huge difference. Could it be temperature
> related? If 42cu ft lasts for 16-20 minutes, that implies an airflow of
> 2cfm.
>
> If nitrogen is a lot better, then rigging up a compressor (or a fan) and
> some cooling tubing with a recirculating arrangement might be worthwhile.
> You're running 100 psi, but I assume that's at the regulator. What's the
> pressure at the gap (or, more properly, at the orifices). Are you at
choked
> flow (i.e. the flow through slot/hole is supersonic)?
>
>