The stove is located outside the house
and acts as a heat exchanger through a double wrapped flue pipe. It is
indeed vertically -stack-loaded directly from the top (the fuel is fed
in through the top of that front vertical tube below which is about 6 ft
tall). The stack is then sealed.
The hot exhaust is then directly
ducted /sucked up through a stainless steel flue/chimney/heat
exchanger, about 16 ft straight up in fact. Around this core chimney, he
has wrapped a larger sheet metal outer pipe. He then attached
smaller conventional sheet metal tubes onto the 10' tall heat exchanger
pipe near its upper and lower end. These serve to feed exhaust air from
the house into the annular space between the chimney and the larger
sheet metal tube- DOWN and out from that tube back into the house, as
heated air, acting as a heat exchanger in effect.
The system is positively charged in
that air is force fed by fan into the upper duct so that if any leaks
occurred it would vent off to the atmosphere and not into the house.
Harold next to vertical stack-fed
cross draft heat exchanging stove. Stack feeder is the shorter vertical
rusty, creosote caked, square, heavy walled steel tube ( he is planning
to resolve this with a better design of the top cap). The sheet metal
halfway up this rusty tube was used as heat shield during tests
The rusty but very hefty square steel
pipe, with a loosely positioned galvanized sheet steel heat baffle
around its lower half which he is pointing at, is the feed tube for the
The tall galvanized stack in back is a
heat exchanger for his flue.. The whole issue is of course regulating
flash back up the feed tube while keeping moving parts to the minimum..
The taller tube of sheet metal is the
heat exchanger. Core tube inside this is stainless. The larger exterior
tube acts as a heat shroud.. The air inlet tube (coming from the house
ceiling / attic) is the upper horizontal sheet metal tube. Air is
blown in and down the annulus of this larger vertical tube to be ducted
into the house at floor level from the base
Grate in Combustion chamber.
Briquettes fall down thru the rusty vertical air sealed stack to rest on
the upper grate. Ashes fall off to lower pan. Heat is ducted to rear and
up and out the chimney (behind the front feed stack /tube shown). Air
flow is coming in through the front door:
Stove core box is square heavy walled
steel tube same size as stack a baffle surrounds this fire box.
Secondary air fed in thru channels in side wall and into back of stove
just beyond the combustion zone.
Last night I lit the fire and left the
air damper open a little wider than usual. As you can see in the picture
I had to jam a triangular piece of metal into the damper so that it
would not slide open. The stove body was entirely glowing red and to
look into the air inlet was like looking at a welding arc.
is a combination of paper, sawdust and leaves
The flue contains a 5/8" shaft 16'
long that has many pieces of expanded metal welded to it. The expanded
metal scrapes the inside of the flue so that soot and ash does not build
up an insulating surface. this expanded metal also acts as heat transfer
fins that are in contact with the inner flue wall.
This is an extrusion press with a 60"
handle and 2" work end. It produces a 4" x 4" extrusion with a 1.25"
hole. The output is about one inch per minute but has a very simple
operation; Load the hopper, force material into the piston, pull the
large lever down. Finished material extrudes out the end onto a board
for cutting into various lengths.
12" long logs stacked to dry. These
logs are of various combinations of paper/cardboard pulp, saw dust, and
coffee grounds. So far the best recipe for pressing a nice looking log
is about 50% paper/card pulp with 40% sawdust and 10% coffee.
This is the wide open piston loading
chamber. It holds about two cups of wet material. the hopper holds about
5 gallons of material.
This is a side view of the lever
action. As the lever is pressed down, the pressure applied to the piston
increases until it locks in the fully compressed position.
Thanks to Richard Stanley from the
for authoring some of this page.