page about flames

[Przemek]

This is my first post, so hello everybody!

I have created a webpage about flames and clean combustion.
www.piec-zero.tk
I understood the problem of bad combustion after I had heard about rocket mass heaters and their design. It was about 5 years ago.
Then I read some theory and came to conclusion that in principle clean combustion is not that difficult.
About 1.5 years ago I started writing a webpage and also found Peter's batch box stoves.
Since then my internet friend created some proof-of-concept devices (he is more interested in coal burning).
I started everything in Polish and now I translated main pages to English.
I put a google translator switch for all pages but sometimes there is also a British flag in Navigation menu, which links to manually corrected English page.
I would appreciate help with correcting language errors.

On the welcome page I tried to make an abstract and I point to 3 pages which present a main thought.
I'm not sure what to do further. I'm theoretician so now I turn to NOx equations analysis and probably CFD simulations in some future.

I would say this is a synthesis why some stoves or burners are good and clean and others have some deficiencies.
A point of view.
Perhaps nothing new, but on the other hand, I haven't found it presented in simple words.

My friend created some test stoves which I presented on the blog page. Up to now I have translated only one post from March this year.
Probably discussion about our stoves should go to "other stoves" section but, as I see, this section is for more theoretical topics.

My question is whether my page can be useful for practitioners.

[gadget]

Hi Przemek,

I finally got a chance to read through your translation and there is allot of errors. It may be easier to just have it rewritten. It is a complex topic and that makes correcting it harder.

I think it is great to help educate and spread the knowledge. Wood heat has a future and it is clean.

Have you heard of the term "3 T's of efficient combustion"?

Time
Temperature
Turbulence

Also, I learned allot researching thermal oxidizers, they are the cleanest there is when it comes to combustion 

-Gadget

[Przemek]

Well, it's not very good.
You mean errors in the presented material or language errors? My English is probably not the best and also it was not a real translation, I just corrected google translator here and there to make it comprehensible. There is very little interest in the subject (i.e. I tried to present it on some other, Polish, forum) and it's somewhat discouraging.
Initially I wrote everything as a wiki site with hope that other users would contribute, but wordpress is simpler.
Thank you very much for reading my pages and for your post.
And if you mean errors in the presented material, I would be glad to discuss it.

3 T's, yes, I've heard about it, sure.
I would write them in this way: Temperature + (Time+Turbulence)
Combustion reactions rates depend on the temperature very much. In a practical stove context one can think about temperature as an on/off switch.
And time is related to diffusion and turbulence. Diffusive flames are called so because mixing of fuel and oxidizer is what controls the reaction speed. And mixing happens because of diffusion.
Turbulence mixes large areas making edges. And the smallest edges are mixed further by diffusion. Strong turbulence makes smaller edges and in the small scale diffusion acts faster so stronger turbulence allows shorter times (to some extend of course) and makes easier to keep the Temperature high.

I think 3T's can be written like Temperature + Mixing because probably it should be possible (I don't mean easy) to make nearly perfect combustion without any turbulence, using laminar static mixers. Initially I wanted to explore this direction but after few experiments it seems that solid fuel make a lot of problems by itself and now we (with my colleague) try to make just stable, controllable burning of solid fuel. For turbulence you just need some pressure difference. With electric fan it's easy, although some people prefer to avoid electricity.

By thermal oxidizer you mean this? en.wikipedia.org/wiki/Thermal_oxidizer
It is a very close subject. Wiki article even uses the term "afterburner" for our case.
One already has a source of heat and flame in a stove (furnace, boiler) so the point is to use it properly. If you look at page www.piec-zero.tk/wp/summary-en/ I've made a distinction "A/B". A is a main part of a flame and a source of heat and B is a place where we want to help to oxidize combustion leftovers by using this heat. The simplest way is to insulate afterburner to prevent heat dissipation but other directions are also possible.

[gadget]

Hey Przemek,

Language errors. The materials look good from what I have read so far. I was reading through some other pages and they had less errors and was easier to read. That site has allot of good info thanks for sharing. Sorry I can't help with any language corrections.

[manU]

Hi przemek. Thanks for sharing your work. What I have seen of it makes sense to me and is in line with my understanding of fire and flames. And with the concept of the 3 Ts. Also found interesting videos that I had not seen before. I haven't read it completely in detail, but I think is a good resource for anyone thinking about clean combustion, and you are doing a good work explaining complex ideas. Don't be discouraged, be patient...
Cheers

[gadget]

I just want to add that it is the 3 T's of combustion "efficiency", not just combustion. Combustion would be the fire triangle = Fue,l Heat, and Oxygen (or oxidizer). 3 T's comes after the fuel triangle so the emphasis is on efficiency.


Just to clarify..

-Gadget