[Stoves] partial fan compensation by static-mixers?

[Boll, Martin Dr.]

Dear Paul and Andrew,

 

For building a simple static-mixer I have a good and a bad news. 

The good news is: I can "twist" a double-helicoid -by hand- out of sheet
metal.

The bad news is, up to now I reach only 5mm (1/5'') breadth, and that size
does not make sense to construct a static-mixer.

 

I have in mind an idea for a "twister", to be able to get bigger helicoids.
But I still know, there is another difficulty: one can twist up to break the
metal-band, because of too hard twisting=stretching in the peripheral area.
And that will give another limit. But I have to test this, when I have the
possibility to form/twist bigger sheet-metal-bands. 

 

By lack of time, I can only tell you this.  The earliest date I can begin to
realize that twister, will be end of August. 

I will keep you informed about the progress. 

For the discussion up to now, static-mixers are only theoretically. 

But meanwhile you can have a look for working and flow-resistance of
existing static-mixers which are in use in industrial installations. 

There are quite different shaped mixers, which are too complicated for me to
build and too expansive to buy.

Quite a while ago I looked for it. Naturally at first place in German
web-sites.(they are called: Statik-Mischer)

I don't know now the companies and web-addresses. I had to google again.

 

The right area, to use the static-mixers in stoves, -theoretically-, seems
to me the same as you (Andrew) proposed. 

I proposed putting them into the burning chamber, because I feared the
static-mixers could cool down the gas-stream too much, and therefore make a
negative effect for burning in the end of the secondary burning area.

What I read about static mixers in industry-use: I am not concerned they
would make too much flow-resistance. 

Even by reducing the draft a little bit, I hope the better mixture of gasses
and air will be the more positive effect, than reducing velocity/draft.

Practice will show, not theory! 

 

( P.S. scientists said: Bumble-bees can theoretical not fly!  Non scientists
did not believe that statement. Meanwhile scientists search to know, how it
is possible that bumble-bees do fly.) 

>From Saturday on I will be off line for some days.

I whish you all a great Aprovechio-meeting!

 

 

Martin