Hermit DeLuxe wrote:
Thank you Satamax. I also believe in a rocket stove designs without needing the tons of mass. A stand alone rocket stove heating the room with scraps of wood safely is all some of us want. Besides isn't the room and all the objects in the room being heated mass? A well insulated home will retain heat for days, if not for many hours depending on building heat loss. Too much is being made on the added efficiency of the mass to the rocket stove design.
The true area to extract the heat of the rocket stove is top center of the drum. Fooling around with the exhaust gases to heat a mass seems a little dangerous, I know it works, but it isn't the only way. For those folks with the cobb houses and a permies lifestyle, rocket stove heated cobb benches work great. But most of us depend on our furnace to heat the house when were away and need a alternative method to use when we are home to help offset the gas bill.
Hermit DeLuxe wrote:
Also I have found the minimal mass of my rocket stove seems to keep putting out a lot of heat for twenty or thirty minutes after the flames has gone out with just a bed of glowing coals. A efficient a low mass or no mass rocket stove is possible and I hope to work out a working design or at least something that works for me. I hope for more banter on this subject, Thank you.
The mass heater burns as fast as it can producing mostly CO2 and water...
Sorry Len, i gonna be picky.
You say ""
But mass has nothing to do with this full burning. It's the oxygen intake of the stove which makes the burning cleaner.
And, if the whole of the heat is already extracted before it reaches the mass, the mass serve no purpose. I know it's not. That's why i'm trying to work on this side. Extending the size of the heat exchange surface.
Mild climate? Here's my winter office, in the end of april
That's france, and southern too
But i'm in the southern alps, right next to the italian border. My flat and workshop are around 4900 feet high.
I'll see if i can extract enough heat to make the workshop uncomfortable I'm planing an air jacket around the radiator, with tubes and a fan to get the heat to the insulated part of the workshop.
I still want as small a footprint as possible. kerosene heaters put out a good bit of heat for a small footprint and I think the same effect can be obtained from a small footprint rocket stove where it would burn hot for a short while to warm up the area then be out. I am still mulling over my options but because money is tight I do not want a massive chimney which would cost money and attract attention. if burning efficiently I should be able to have a simple vent outside perhaps 3 or 4 inch diameter.
Go for it! we are all experimenting anyway... I've had to make adjustments to mine already... and it isn't even finished.
Mine will have mass but still only be 25 inches in diam. unless I add more. I figure the mass will be about 700lbs. The water in a 50gal water tank might be 500lbs so not much more... (I know a cubic foot of water is just over 60lbs, but not how many gal/cuft... not sure how close to 10lbs/gal it is).
Len, just thought since I lurk around here.
7.48 galons to cubic foot.
8.34 pounds per galon.
62.4 pounds cubic foot.
These are figures for water at a specific gravity of 1, and realize this would be much like at the temp that would be drank out of the tap.
Which gallon? An imperial barrel is 45 gal and 55us gal.
Looking it up, the imperial gallon is based on 10 pounds of water.... how can you tell I'm from Canada?