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Difference between revisions of "Rocket stove mass heater"

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== ABSTRACT ==
 
 
[[Image:Organicarts-2870436279.jpg|frame|400px|A mass heater made by [http://www.flickr.com/photos/organicarts/2870436279/in/set-72157603947187095/ Organic Arts]]]<center>''Building a rocket stove mass heater - including research''</center>
 
[[Image:Organicarts-2870436279.jpg|frame|400px|A mass heater made by [http://www.flickr.com/photos/organicarts/2870436279/in/set-72157603947187095/ Organic Arts]]]<center>''Building a rocket stove mass heater - including research''</center>
  
 
{{TOCright}}
 
{{TOCright}}
  
== Introduction ==
+
== Advantages ==
Thinking to build a [http://en.wikipedia.org/wiki/Rocket_stove_mass_heater rocket stove mass heater], but are very new to the idea? Follow along as I find out as much as I can about them and eventually build one of my own. Any assistance would be greatly appreciated!
+
* heat your home with much less wood than an open fire (it has been claimed 5 to 10 times less)
 +
* [[exhaust]] is mainly steam and CO<sub>2</sub>, with much less of the impurities normally contained in smoke. (A little smoke is emitted at the beginning.)
 +
* the heat from one fire can last for days thanks to the [[thermal mass]]
 +
* you can build one in a day and half
 +
* cost is very low - it is possible to build one for less than $20, plus natural materials collected locally (mainly earth).
  
== Information resources ==
+
== Design principles ==
* [http://picasaweb.google.com/eritter/RocketStoveDecember2007# A photo gallery of an installation]
+
 
* [http://www.youtube.com/share?p=894148DE24828071 A Youtube playlist looking at various installations and design considerations]
+
A [[stovepipe]] or [[chimney]] is still recommended to vent the air to the outside to minimize [[indoor air pollution]].  
* [http://www.amazon.com/Rocket-Mass-Heaters-Superefficient-Woodstoves/dp/0966373839/ref=reg_hu-wl_item-added Rocket Mass Heaters: Superefficient Woodstoves YOU Can Build (Paperback)] by Ianto Evans and Leslie Jackson
+
To gain as efficient a [[heat transfer]] as possible, use a long thin pipe or [[heat exchanger]], to extract maximum energy from the flue gas. The challenge here is that increasing the resistance offered by the pipe will interfere with operation of the furnace. Increasing the height of the vent increases the chimney effect and may counteract this.
* [http://ilovecob.com/archive/solunit-rocket I Love Cob Rocket Mass project well documented]
 
  
 
== Questions ==
 
== Questions ==
 +
 
*It seems that when initially starting the fire, smoke might not draw through the system until the burning chamber is heated and drawing enough air so that smoke is taken out the exhaust. If this is a common problem, what additions could be added to the design so that smoke does not fill the room in which the heater is situated?
 
*It seems that when initially starting the fire, smoke might not draw through the system until the burning chamber is heated and drawing enough air so that smoke is taken out the exhaust. If this is a common problem, what additions could be added to the design so that smoke does not fill the room in which the heater is situated?
 +
*When feeding a stove pipe horzontaly out of a wall it is often put into a t with a bottom that can open to allow cleaning the chimney.
 +
-Some builders will light a single sheet of newspaper crumpled into a ball in the T outside to start the air flow going the right way.
 
*Can the mass covered flu work vertically so that the hot gasses can be drawn downstairs and then exhausted back upstairs?
 
*Can the mass covered flu work vertically so that the hot gasses can be drawn downstairs and then exhausted back upstairs?
 +
- Any reversal that attempts to draw hot air downwards tends to air lock the flow. If at all possible, always stay level or sloping up.
 
*How long does the stove top last given the amount of heat being put there? Is maintainence built into the standard design?
 
*How long does the stove top last given the amount of heat being put there? Is maintainence built into the standard design?
 +
-Cleanouts are often included in the design of the exhaust pipe in the mass to allow removal of ash build up or a sucked in paper ball.
 +
 +
== Understanding the market ==
  
== Understanding the Market ==
 
To make bullets use the asterisk:
 
 
* Permits and local regulations need to be considered which often require partical output measurements along with efficiency ratings. This will be difficult for a self built RSMH as it will always be different.
 
* Permits and local regulations need to be considered which often require partical output measurements along with efficiency ratings. This will be difficult for a self built RSMH as it will always be different.
 
* RSMH are largely Do It Yourself and so are not commonly seen as sellable commodities and do not have standards in place.
 
* RSMH are largely Do It Yourself and so are not commonly seen as sellable commodities and do not have standards in place.
 
* Fuel efficiency and possible reduction in emmissions could make this heater a prefered heating method in many regions
 
* Fuel efficiency and possible reduction in emmissions could make this heater a prefered heating method in many regions
  
== Project Requirements ==
 
Describe team goals here.
 
  
== Design ==
+
== Safety ==
Describe your design here.
+
 
[[Image:Aplogo3.gif|thumb|right|sample photo caption]]
+
Carbon monoxide is known as the silent killer, responsible for approximately one million deaths each year worldwide.  Carbon monoxide poisoning is a serious threat when burning wood in an enclosed space without proper venting.  Some steps you can take to make your rocket mass heater safer include:
Here is some [[Help:Contents#Uploading|help uploading files]].
+
* Always install a carbon monoxide detector and regularly change the batteries.
 +
* Always have a certified professional stove installer review your installation.
 +
* Install an external air source vent and completely seal the stove from the interior of your structure.  This may include adding a door to seal the fuel chamber.
 +
* To prevent the risk of 'smoke-back' out the external air source vent, the external air source vent must be as low as possible, optimally 3 feet or more below the fuel chamber in order to reduce the risk of 'smoke-back' out the external air source vent and carbon monoxide being drawn back into your structure.
 +
* The exhaust vent of your stove must be at least 3 feet above your roof in order to reduce the risk of carbon monoxide being drawn back into your structure. 
 +
* If you are having a problem with 'smoke-back' into the interior of your structure, your stove design is not safe and may be a serious risk to you and your family.  Leave the area immediately and replace your stove as soon as possible.
 +
* The amount of weight (or mass, if you prefer) involved in a thermal-mass stove may be unsafe for existing flooring, and do-it-yourself builders may be unfamiliar with safe and appropriate measures for such construction.
 +
* When in doubt, be safe, not sorry.
 +
 
 +
 
 +
=== Next steps ===
 +
 
 +
* [http://leighblackall.blogspot.com/2010/05/starting-rocket-stove-thermal-mass.html 2010 progress notes]
 +
 
 +
== Contact details ==
 +
Leigh Blackall in Canberra, Australia is working on this and would like to hear from you: {{email|leighblackall|gmail|com}}
 +
 
 +
== See also ==
 +
 
 +
* [[Rocket stoves]]
  
=== next level heading ===
+
== Interwiki links ==
You may need deeper level headings.  Just keep adding equal signs to get that.
 
  
== Costs ==
+
* [[Wikipedia:Rocket stove mass heater]]
{| class="wikitable"
 
|-
 
! header 1
 
! header 2
 
! header 3
 
|-
 
| row 1, cell 1
 
| row 1, cell 2
 
| row 1, cell 3
 
|-
 
| row 2, cell 1
 
| row 2, cell 2
 
| row 2, cell 3
 
|}
 
See [[Help:Tables]] for more.
 
  
== Discussion ==
+
== External links ==
Your discussion.
 
  
=== Next Steps ===
+
* [http://ilovecob.com/archive/solunit-rocket I Love Cob Rocket Mass project well documented]
The next steps.
+
* [http://www.richsoil.com/rocket-stove-mass-heater.jsp rocket stove mass heater] - richsoil.com article with explanation and instructions, including pictures and video.
 +
* [http://picasaweb.google.com/eritter/RocketStoveDecember2007# A photo gallery of an installation]
 +
* [http://www.youtube.com/share?p=894148DE24828071 A Youtube playlist looking at various installations and design considerations]
 +
* [http://www.amazon.com/Rocket-Mass-Heaters-Superefficient-Woodstoves/dp/0966373839/ref=reg_hu-wl_item-added Rocket Mass Heaters: Superefficient Woodstoves YOU Can Build (Paperback)] by Ianto Evans and Leslie Jackson
 +
* [http://www.permies.com/permaculture-forums/1078_0/alternative-energy/rocket-stove-and-butt-warmer Rocket stove and butt warmer] -thread at permies.com
 +
* [http://www.makeitmissoula.com/2011/04/paul-wheaton-clean-sustainable-wood-burning/ Clean Sustainable Wood Burning]  2 videos and blog on Earth Day Rocket Mass Heater
 +
* [http://www.richsoil.com/permaculture/182-rocket-mass-heaters-permaculture-podcast-019/ Podcast on Rocket Mass Heaters] by Paul Wheaton, and Ernie and Erica Wisner
  
== Conclusions ==
+
{{stub}}
Your conclusions.
 
  
== Contact details ==
 
Leigh Blackall in New Zealand: leighblackall AT gmail DOT com
 
  
[[Category:Projects]]
+
[[Category:Heating]]
 
[[Category:Rocket stoves]]
 
[[Category:Rocket stoves]]
 +
[[Category:Cobb]]
 +
[[Category:Permaculture techniques]]

Latest revision as of 21:53, 13 January 2020

A mass heater made by Organic Arts
Building a rocket stove mass heater - including research

Advantages[edit]

  • heat your home with much less wood than an open fire (it has been claimed 5 to 10 times less)
  • exhaust is mainly steam and CO2, with much less of the impurities normally contained in smoke. (A little smoke is emitted at the beginning.)
  • the heat from one fire can last for days thanks to the thermal mass
  • you can build one in a day and half
  • cost is very low - it is possible to build one for less than $20, plus natural materials collected locally (mainly earth).

Design principles[edit]

A stovepipe or chimney is still recommended to vent the air to the outside to minimize indoor air pollution. To gain as efficient a heat transfer as possible, use a long thin pipe or heat exchanger, to extract maximum energy from the flue gas. The challenge here is that increasing the resistance offered by the pipe will interfere with operation of the furnace. Increasing the height of the vent increases the chimney effect and may counteract this.

Questions[edit]

  • It seems that when initially starting the fire, smoke might not draw through the system until the burning chamber is heated and drawing enough air so that smoke is taken out the exhaust. If this is a common problem, what additions could be added to the design so that smoke does not fill the room in which the heater is situated?
  • When feeding a stove pipe horzontaly out of a wall it is often put into a t with a bottom that can open to allow cleaning the chimney.

-Some builders will light a single sheet of newspaper crumpled into a ball in the T outside to start the air flow going the right way.

  • Can the mass covered flu work vertically so that the hot gasses can be drawn downstairs and then exhausted back upstairs?

- Any reversal that attempts to draw hot air downwards tends to air lock the flow. If at all possible, always stay level or sloping up.

  • How long does the stove top last given the amount of heat being put there? Is maintainence built into the standard design?

-Cleanouts are often included in the design of the exhaust pipe in the mass to allow removal of ash build up or a sucked in paper ball.

Understanding the market[edit]

  • Permits and local regulations need to be considered which often require partical output measurements along with efficiency ratings. This will be difficult for a self built RSMH as it will always be different.
  • RSMH are largely Do It Yourself and so are not commonly seen as sellable commodities and do not have standards in place.
  • Fuel efficiency and possible reduction in emmissions could make this heater a prefered heating method in many regions


Safety[edit]

Carbon monoxide is known as the silent killer, responsible for approximately one million deaths each year worldwide. Carbon monoxide poisoning is a serious threat when burning wood in an enclosed space without proper venting. Some steps you can take to make your rocket mass heater safer include:

  • Always install a carbon monoxide detector and regularly change the batteries.
  • Always have a certified professional stove installer review your installation.
  • Install an external air source vent and completely seal the stove from the interior of your structure. This may include adding a door to seal the fuel chamber.
  • To prevent the risk of 'smoke-back' out the external air source vent, the external air source vent must be as low as possible, optimally 3 feet or more below the fuel chamber in order to reduce the risk of 'smoke-back' out the external air source vent and carbon monoxide being drawn back into your structure.
  • The exhaust vent of your stove must be at least 3 feet above your roof in order to reduce the risk of carbon monoxide being drawn back into your structure.
  • If you are having a problem with 'smoke-back' into the interior of your structure, your stove design is not safe and may be a serious risk to you and your family. Leave the area immediately and replace your stove as soon as possible.
  • The amount of weight (or mass, if you prefer) involved in a thermal-mass stove may be unsafe for existing flooring, and do-it-yourself builders may be unfamiliar with safe and appropriate measures for such construction.
  • When in doubt, be safe, not sorry.


Next steps[edit]

Contact details[edit]

Leigh Blackall in Canberra, Australia is working on this and would like to hear from you: leighblackallAtsymbol.pnggmailDot.pngcom

See also[edit]

Interwiki links[edit]

External links[edit]



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