Post by robgrip on Nov 30, 2014 4:44:07 GMT -8
hoi,
New member here.
I am Rob Grip
live in Groningen ,netherlands
I really like this website and at last i decided to become a member.
Altough i am not good with computers and sending messages .(I hope this one makes it to the site)
I like to share ideas and experience with you
I have build about 10 rocketstove's.all different size's.
started with barrelstove's "aproveccho style",ended up building portable multi- use auto feed rocketstove pizza ovens,
Build several kinds of woodstove's .Indoor stove's from small size to very big, outdoor stove's, sauna-stove's and a hot tub stove .All mainly build from scrap iron.
Build/ put together a construction kit masonairy stove "tichelofen". This had a pre manufactured combusting area .
Lately i build two rocketstove mass heaters in Groningen.
The first one has a six inch (16 cm) duct system about 5 meter long and a three meter chimney
It was build during a workshop
Using drawings and information from Internet .Mainly from Ianto and Erica.
It works well exept the mass doesnt get really warm . Ducting buried to deep in the sandy mass.
the owner took one layer of stone away ,so the bench is 8 cm lower now.
Also changed the mass by taking away the sandy mixture . replaced it for cob
It is gettin better ,but still not really as we expected .
the last one I / we build is for for a sort of restaurant. (the free cafe)
This one has an 8 inch system (18 cm) 9 meter duct system designed in a bench and a 3 meter chimmney
It dint work so well at all at start. Smoke in the room after a while. looked like no draft in the cold staying vertical
exhaust .It was an awkward moment.A lot of work done and a non functional system .Tried heating the exhaust with a hair dryer and that helped.
I / we needed more hot air at the end of the system to provide draft.
Took the thing apart and Made the heat riser about 9 inch taller as recommended in drawings (It was 72 cm.,now it is 85 cm.)
At first the 8 millimeter thick steel heat riser was 3 times longer than the burn tunnel, now it is 4 times longer
I guess because the longer heatriser gives more "volume's" hot air to push it trough the 9 meter horizontal duct system wich ends in the ± 3 meter high chimmney.
Also made the gap between end of heat riser bigger. instead of ±3 centimeter(±1,5 inch) it is now ±7 centimeter (±5 inch) to make the hot air flow easier.
Also made the "manifold" bigger and shaped it more in the direction of the hot flue.
The exhaust is now hand warm when it leave's the building instead of cold before.
The barrel is less warm ,but the mass heats up very well.
No smoke in the room anymore and a nice draft and sound in the feed tube.
A awful lot of condensed water came out of the connections of the duct system by the exhaust at start. Building moisture i guess ,becouse it is getting better . now only a few drops
Also very high consumption of wood in the beginning.
It wasnt economical /thrifty at all.
This is also getting better.
The whole thing weighs about 5000 kilo so i guess you need a lot of wood to heat that up.
Altough r.m.h. are efficient , you can't expect miracles i guess
It looks really good, is nice and warm and really is a big contribution the the place!
Outside i plastered with clay/ loam with chalk . The backrest i plastered with a chalk-cement mixture to prevent dirty clothes when leaning to it
i put chalk into the plaster mixtures in order to make the plaster mixture more "elastic" ,For easier handling and also to prevent cracks in the surface
I wonder if there are more dutch members so we can meet up ,expiriment and build together
New member here.
I am Rob Grip
live in Groningen ,netherlands
I really like this website and at last i decided to become a member.
Altough i am not good with computers and sending messages .(I hope this one makes it to the site)
I like to share ideas and experience with you
I have build about 10 rocketstove's.all different size's.
started with barrelstove's "aproveccho style",ended up building portable multi- use auto feed rocketstove pizza ovens,
Build several kinds of woodstove's .Indoor stove's from small size to very big, outdoor stove's, sauna-stove's and a hot tub stove .All mainly build from scrap iron.
Build/ put together a construction kit masonairy stove "tichelofen". This had a pre manufactured combusting area .
Lately i build two rocketstove mass heaters in Groningen.
The first one has a six inch (16 cm) duct system about 5 meter long and a three meter chimney
It was build during a workshop
Using drawings and information from Internet .Mainly from Ianto and Erica.
It works well exept the mass doesnt get really warm . Ducting buried to deep in the sandy mass.
the owner took one layer of stone away ,so the bench is 8 cm lower now.
Also changed the mass by taking away the sandy mixture . replaced it for cob
It is gettin better ,but still not really as we expected .
the last one I / we build is for for a sort of restaurant. (the free cafe)
This one has an 8 inch system (18 cm) 9 meter duct system designed in a bench and a 3 meter chimmney
It dint work so well at all at start. Smoke in the room after a while. looked like no draft in the cold staying vertical
exhaust .It was an awkward moment.A lot of work done and a non functional system .Tried heating the exhaust with a hair dryer and that helped.
I / we needed more hot air at the end of the system to provide draft.
Took the thing apart and Made the heat riser about 9 inch taller as recommended in drawings (It was 72 cm.,now it is 85 cm.)
At first the 8 millimeter thick steel heat riser was 3 times longer than the burn tunnel, now it is 4 times longer
I guess because the longer heatriser gives more "volume's" hot air to push it trough the 9 meter horizontal duct system wich ends in the ± 3 meter high chimmney.
Also made the gap between end of heat riser bigger. instead of ±3 centimeter(±1,5 inch) it is now ±7 centimeter (±5 inch) to make the hot air flow easier.
Also made the "manifold" bigger and shaped it more in the direction of the hot flue.
The exhaust is now hand warm when it leave's the building instead of cold before.
The barrel is less warm ,but the mass heats up very well.
No smoke in the room anymore and a nice draft and sound in the feed tube.
A awful lot of condensed water came out of the connections of the duct system by the exhaust at start. Building moisture i guess ,becouse it is getting better . now only a few drops
Also very high consumption of wood in the beginning.
It wasnt economical /thrifty at all.
This is also getting better.
The whole thing weighs about 5000 kilo so i guess you need a lot of wood to heat that up.
Altough r.m.h. are efficient , you can't expect miracles i guess
It looks really good, is nice and warm and really is a big contribution the the place!
Outside i plastered with clay/ loam with chalk . The backrest i plastered with a chalk-cement mixture to prevent dirty clothes when leaning to it
i put chalk into the plaster mixtures in order to make the plaster mixture more "elastic" ,For easier handling and also to prevent cracks in the surface
I wonder if there are more dutch members so we can meet up ,expiriment and build together
