Comments on: Our rocket stove water heater: 2.5 years on

By: milkwoodkirsten

milkwoodkirsten — Thu, 25 Apr 2013 02:06:55 +0000

well done Joe! onward and upward (did you see what i did there?)

By: Joe Meijer

Joe Meijer — Thu, 25 Apr 2013 01:39:00 +0000

Dear Milkwood people
Brilliant!! thanks so much for sharing this, well done.
Many thanks because it has helped me build a system which I have just tested, and I would like to share the details:
Rocket stove j type 150mm square section, feed tube 500mm high, no heat riser.
Boiler 200mm dia. 305mm high, 8x 38mm flue tubes (6.6l water capacity). positioned straight on burn tunnel.
firebox with slide gate for control to 100mm dia flue 3meters tall.
for test connected to 80l hot water cylinder.
9:30am water temp at start 10.8degrees celcius
10.00am 42 degrees
10:30 65 degrees
11:00 68 degrees
During test the smokebox surface temp reached a max of 146 degrees.

Very happy with results, just need to work on making the burn tunnel from firebrick now. Kind regards joe blow

By: Edward Metcalfe

Edward Metcalfe — Tue, 02 Apr 2013 22:47:18 +0000

Do you have a ratio of size for the feed barrel compared to the burn tube and also to the burn tube to its house outside diameter? I would also love to know the ratio for the height of the burn tube to it’s size? I want to work on something very small and test ratios by making mini rocket stoves. Say I have a 4 inch round cylinder by 7 inch tall. I could guess at the tubing used for the heat riser and fee barrel but want a ratio that can be adapted to a larger model?

By: milkwoodkirsten

milkwoodkirsten — Tue, 19 Mar 2013 20:08:46 +0000

Er, we’re in Australia

By: Diana

Diana — Tue, 19 Mar 2013 19:38:52 +0000

THIS IS WHAT MADE THIS COUNTRY GREAT,LOVE OF GOD,LOVE OF FAMILY,FREEDOM and AMERICAN INGENUITY,WELL DONE!!!

By: Enrique Garcia

Enrique Garcia — Mon, 28 Jan 2013 20:16:14 +0000

Awesome !! I built a small rocket stove out of cans just to try it out & it works great !! I wanna build one of these next !! Need some land first !!

By: pajamas

pajamas — Mon, 19 Nov 2012 19:02:28 +0000

hi i have three questions: 1) where does the water come from and go to after the shower, 2) are you using electricity to pump the water to the shower, 3) what’s the temperature of the air coming out of the exhaust vent, if you know?

k thx. beautiful job, i like your creativity and courage to try something new.

By: Joe blow

Joe blow — Wed, 03 Oct 2012 02:55:25 +0000

Simo
I keep seeing this same question on other blogs too, allow me to warn you. copper pipe has too much surface area in relation to its volume. you will make steam instead of hot water. I have welded up a boiler type heat exchanger, and if you don’t want rusty water you will need a stainless one, don’t let that put you off though. I have a boiler 250mm dia. 500mm long with 8 flue tubes dia 38mm. works a treat just to be safe add a pressure, temp relief just like a hot water cylinder. A fabrication shop can help you might even be cheaper than you think. I can supply you with a drawing.
Kind regards Joe blow

By: Joe blow

Joe blow — Wed, 03 Oct 2012 02:48:21 +0000

to modify your firepit, just build the lower part of the j type rocket stove using firebricks, it will be self stoking to some degree too kind regards joe blow

By: Joe blow

Joe blow — Tue, 02 Oct 2012 02:51:30 +0000

To whom it may concern at milkwood
I had a little question about the rocket stove shower system.
I think I’t great!
is there any reason why the burn tunnel is so much higher than it is wide?
Thanks Joe Blow