allen lumley wrote: Leonard Allen : Part of the magic of a good working Rocket Stove is the heat gain in the system as the 'flue gases' cool down below 212 F.
At that point we gain the rather surprisingly large heat of condensation. Due to all of the variables, it would be nearly impossible to tell when
and where in the Thermal Benches Stovepipe that this condensation begins. This should be one or more threads all to thereselves ! The point
here is that approximately the last 1/4 of the pipe should slope slightly downhill to allow water to drain out of the pipe to the out doors!
Any slope that is enough to be visible is enough slope !
There are out there high efficient, Home heating, Forced air oil and gas fired furnaces that for a variety of reasons have a 'booster fan' inline in the
exhaust pipe, The failure rate for the 'booster fan' in oil fired furnaces runs ~5 years~, thats three replacements in the 20 year warentee'd life of
the Furnace, the failure rate for gas furnaces seems longer, none of these fans are like what S.G. B. suggests and would be a D.I.Y. build 1
For the good of the craft, be warm, be safe, PYROmagicly - Big Al
allen lumley wrote: To All : I know I'm overstating the obvious here but, We have a design that is capable of great efficiency in turning wood, ESPECIALLY small wood,
into heat energy, it has a name and that is - Rocket Stove ! After we have created this minor(!) miracle, we still need to deal with this gift properly
If we make a serious effort to use this great gift and not squander it the way that conventional Wood Stoves do, we are given a second miracle. When
we use this boon from mother nature as we must believe we were intended to use it, (and store it for later use ) frugally, it's name is Thermal Mass .
Its use reveals this second gift, the latent heat of vaporization, which we 'get back' and use or store as the flue gas temperatures drop back below 212F!
And what cost do we pay, what burden must we bear to be given this benison. Its simple, we properly design our thermal battery/mass to use all of the
heat energy to a point near 150 F or lower at the outdoor chimney, and allow for the drainage of condensed water vapor in the last 1/4 of the Thermal
Mass! For the good of the Craft, be safe, keep warm, PYRO magically -Big AL
Andrew Ray wrote:wouldn't a sink trap (that is filled before first firing) keep the gases out?
in case my terminology is off, a sink trap is that u-shaped piece under a sink that always stays filled with water to prevent any bad smelling gasses from the drain pipes coming up through the sink.