[Stoves] Water heating with TLUDs

[Erin Rasmussen]

I put the Ed's message and photos on the web site, and you can see the
youtube video on the same page. 
http://stoves.bioenergylists.org/content/welsh-biochar-making

- Erin Rasmussen
erin at trmiles.com 

-----Original Message-----
From: ajheggie at gmail.com [mailto:ajheggie at gmail.com] 
Sent: Wednesday, October 09, 2013 12:02 PM
To: Discussion of biomass cooking stoves
Cc: Erin Rasmussen
Subject: Water heating with TLUDs

This message below from Ed in Wales contained a number of images which are
too large for [stoves]. The link to youtube shows the overall layout of Ed's
indoor water heater and though the audio is poor he explains how it works.

I expect Erin will see if she can upload the images to the website.

AJH
> 
>Hi sorry I havn't been following all of this thread, but I thought this 
>might be of interest to somebody,
>
> I
>am a market gardener, I produce a steady stream of biochar from my 
>water heating systems. I live in Wales, it is cold and wet here and I 
>like washing in hot water.
>
> I
>have played with bringing tlud stoves indoors but it is not easy and so 
>I have built water heating systems using what I call biochar rocket 
>stoves (sorry if this brings back bad memories Crispin!) Because they 
>are not filled, lit and emptied from the top they can easily be left in 
>place under heat exchangers, hot plates and a flue outlet pipe. Here in 
>Wales this is important.
> If
>you run them in the evening, when you most need space heat and cooking, 
>then after a couple of hours you have your biochar. It is fine to keep 
>them burning for as long as you want (whereas there is a limit to how 
>much you can keep topping up a tlud) Unlike wood burning stoves, it is 
>possible to have the flue outlet angled up about 30 degrees from 
>horizontal and surrounded in a thermal mass to capture residual heat. 
>Otherwise the 8th photo is of a section of flue outlet with integral 
>thermal mass.
> Shut
>a door on the front and the biochar goes out overnight. My CO meter has 
>yet to read 1ppm indoors. Empty the biochar by sliding out the floor of 
>the stove and it drops straight into a metal bucket, no quenching, no 
>dust and no mess.
> The
>first photos are of these stoves connected to a 50 litre water tank + 
>hotplate and oven for cooking. (The pipe in the second picture is to 
>give secondary air to the flames.) The system in these photos is mobile 
>and connected to a small header tank so that I can do demos at 
>permaculture conventions and workshops.
> The
>youtube video link below is of something different; a double walled 
>flue pipe with feed and empty hoppers for putting in biomass and 
>emptying out biochar. A bit like an anila stove except the inner 
>combustion pipe has no floor, it goes straight through to the stove 
>below. If its ok with Crispin, I was thinking of calling this flue pipe 
>an anila flue pipe.
> 
>http://youtu.be/MTiSTrdYuoA
> 
>Sorry
>Crispin, I do not have the time, money or inclination to test these 
>systems to your required standards. They are capable of heating  over 
>200 litres on one 3 hour burn and catch residual heat in a thermal mass
without any visible emissions.
>
> Ed