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Re: [TCML] RSG Cooling - was - a new coil being born + PICTURES



I don't know an answer to your question but I have found that 400cfm per 10kW works to air cool medium sized SRGs (given G11, proper design, rotary heatsinks, etc.).

Jeff

----- Original Message ----- From: "Yurtle Turtle" <yurtle_t@xxxxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: Wednesday, July 30, 2008 6:25 PM
Subject: Re: [TCML] RSG Cooling - was - a new coil being born + PICTURES


This thread got me thinking...
Is there any consensus over "approximately" how much power is lost (heat I need to remove) through a rsg? I have a 10" pig/coil I usually run at around 10 kVA with a "four gap" rotary. If I were to try and design a cooling system, what would a good rating be for watts to dissipate? I probably run around 400 - 480 bps with a 100 nF cap. I wanted to check the Joules per bang, but hot-streamer is down and that's where I have my specs.

Adam

--- On Tue, 7/29/08, Jeremy Scott <supertux1@xxxxxxxxx> wrote:

From: Jeremy Scott <supertux1@xxxxxxxxx>
Subject: Re: [TCML] a new coil being born + PICTURES
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Date: Tuesday, July 29, 2008, 11:05 AM



> It'll be interesting to see
> how hot it gets.

Yeah I thought that might be an issue too but I'm not
too concerned.
The purpose of the ballast is to ramp up to full power
slowly so most of the time the core won't even be in. I
built everything for 50A but realistically I'll probably
only run it at 30A. (#10 wire in the
ballast.)

> >Here's some of the  50A 220V cables I'm
going
> to use. TIP: Recreational
> >vehicle (RV)  stores are a great supply for 50A
> extention cables.
>
>
> That's a great tip, thanks!
>
> >Maxwell Caps. I've had these for awhile. 100KV
@
> 10nF.
>
> >I can easily short out the last capacitor for 70KV
@
> 15nF:
>
> >
>
>http://mywebspace.wisc.edu/jeremyscott/web/MaxCaps.JPG
>
>
> I hope those outside terminals don't come too
close to
> all that pretty wood!

They actually go through the wood on the ends of the box
and there are two screws that I crank down to sandwich the
bank together. When I want to take a capacitor out, I loosen
the press and stick some wire in there to short out one of
the capacitors then tighten it again. Is that bad? I've
used this capacitor bank before without problems, and I coat
the exposed terminals with polyurethane for an extra little
bit of insulation. (Home Depot has this liquid rubber stuff
I want to try, but it's ugly orange.)





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