Firewood Cookstoves - Revision history

Tom Schulze at 12:59, 30 April 2018

2018-04-30T12:59:29Z

Tom Schulze: Text replace - "link=GIZ HERA Cooking Energy Compendium

[[GIZ HERA Cooking Energy Compendium#Cook

2018-04-30T12:18:35Z

Text replace - "left|831px|GIZ HERA Cooking Energy Compendium|alt=GIZ HERA Cooking Energy Compendium small.png|link=GIZ HERA Cooking Energy Compendium<br/><br/>[[GIZ HERA Cooking Energy Compendium#Cook

Luis Azuaje at 09:49, 27 July 2017

2017-07-27T09:49:29Z

Ranisha at 14:26, 20 December 2016

2016-12-20T14:26:30Z

Ranisha: /* The Rocket Stove Principle */

2016-12-20T14:22:46Z

The Rocket Stove Principle

Lisafeldmann at 13:51, 20 December 2016

2016-12-20T13:51:25Z

Lisafeldmann: /* Wood Fuel Stoves with Forced Convection */

2016-12-20T13:37:59Z

Wood Fuel Stoves with Forced Convection

Lisafeldmann: /* Three-stone Fires or Open Fires */

2016-12-20T13:36:59Z

Three-stone Fires or Open Fires

Lisafeldmann at 13:35, 20 December 2016

2016-12-20T13:35:50Z

Heike Volkmer: /* Further Information */

2016-12-20T12:55:57Z

Further Information

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 *These hot flue gases pass through a well-defined gap between a ‘skirt’, and the pot, resulting in a large percentage of the heat being forced against the sides of the pot, and being transferred to the pot. Where various sizes of pot are used on the same stove, the skirt can be funnel-shaped to accommodate different pots, although some efficiency will be lost.
-{| style="width:100%;"
+{| style="width:100%"
 |-
-| [[File:Rocket stove.JPG|thumb|left|200pxpx|The rocket stove principle.|alt=Rocket stove.JPG]]<br/>
+| [[File:Rocket stove.JPG|thumb|left|200px|The rocket stove principle.|alt=Rocket stove.JPG]]<br/>
-| [[File:Pic2.JPG|thumb|left|300pxpx|A rocket-type stove in action, and showing insulation of the burning chamber, skirt around pot and support frame|alt=Pic2.JPG]]<br/>
+| [[File:Pic2.JPG|thumb|left|300px|A rocket-type stove in action, and showing insulation of the burning chamber, skirt around pot and support frame|alt=Pic2.JPG]]<br/>
 |}
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 {|
 |-
-| [[File:Roth Malawi Institutional Rocket Stove 170-14 Comparison.jpg|thumb|left|350pxpx|Institutional Stove Compared to an open Fire: 40 instead of 170 kg of firewood]]
+| [[File:Roth Malawi Institutional Rocket Stove 170-14 Comparison.jpg|thumb|left|350px|Institutional Stove Compared to an open Fire: 40 instead of 170 kg of firewood]]
-| [[File:GIZ Roth Malawi-probec-school feeding.jpg|thumb|left|350pxpx|School feeding program Mary`s Meals Blantyre, Malawi]]
+| [[File:GIZ Roth Malawi-probec-school feeding.jpg|thumb|left|350px|School feeding program Mary`s Meals Blantyre, Malawi]]
 |}
 <br/>
 = Wood Fuel Stoves with Forced Convection<br/> =
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 {{#set: Hera category=Cooking Energy System}}
 [[Category:Cooking_Energy_Compendium_(GIZ_HERA)]]

← Older revision		Revision as of 12:18, 30 April 2018
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-[[File:GIZ HERA Cooking Energy Compendium small.png|left|831px|GIZ HERA Cooking Energy Compendium|alt=GIZ HERA Cooking Energy Compendium small.png|link=GIZ HERA Cooking Energy Compendium]]<br/>[[GIZ HERA Cooking Energy Compendium#Basics about Cooking Energy|Basics]] | [[GIZ HERA Cooking Energy Compendium#Policy Advice on Cooking Energy|Policy Advice]] | [[GIZ HERA Cooking Energy Compendium#Planning Improved Cook Stove .28ICS.29 Interventions|Planning]] | [[GIZ HERA Cooking Energy Compendium#Designing and Implementing Improved Cookstoves .28ICS.29 Supply Interventions|Designing and Implementing (ICS Supply)]]| '''[[GIZ HERA Cooking Energy Compendium#Cooking Energy Technologies and Practices|Technologies and Practices]]''' | [[GIZ HERA Cooking Energy Compendium#Designing and Implementing Woodfuel Supply Interventions|Designing and Implementing (Woodfuel Supply)]]| [[GIZ HERA Cooking Energy Compendium#Climate Change Related Issues|Climate Change]]
+{{Hera}}
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 [[Category:Cooking_Energy]]

@@ Line 1: / Line 1: @@
 [[File:GIZ HERA Cooking Energy Compendium small.png|left|831px|GIZ HERA Cooking Energy Compendium|alt=GIZ HERA Cooking Energy Compendium small.png|link=GIZ HERA Cooking Energy Compendium]]<br/>[[GIZ HERA Cooking Energy Compendium#Basics about Cooking Energy|Basics]] | [[GIZ HERA Cooking Energy Compendium#Policy Advice on Cooking Energy|Policy Advice]] | [[GIZ HERA Cooking Energy Compendium#Planning Improved Cook Stove .28ICS.29 Interventions|Planning]] | [[GIZ HERA Cooking Energy Compendium#Designing and Implementing Improved Cookstoves .28ICS.29 Supply Interventions|Designing and Implementing (ICS Supply)]]| '''[[GIZ HERA Cooking Energy Compendium#Cooking Energy Technologies and Practices|Technologies and Practices]]''' | [[GIZ HERA Cooking Energy Compendium#Designing and Implementing Woodfuel Supply Interventions|Designing and Implementing (Woodfuel Supply)]]| [[GIZ HERA Cooking Energy Compendium#Climate Change Related Issues|Climate Change]]
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 = <br/>The Rocket Stove Principle<br/> =
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 [[Category:Cooking_Energy_Compendium_(GIZ_HERA)]]

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 = <br/>The Rocket Stove Principle<br/> =
 One of the most successful concepts in stove design is the rocket stove principle, invented by Dr. Larry Winiarsky. Rocket stoves’ characteristics are:<ref name="http://www.ashden.org/files/Aprovecho2006.pdf">http://www.ashden.org/files/Aprovecho2006.pdf</ref>
 *An elbow-shaped combustion chamber (1:1.5) with a shelf for the fuel wood, which supports the pre-drying of the firewood and allows a controlled, and sufficient, flow of primary air to be warmed as it passes under the wood to the burning wood tips.
@@ Line 234: / Line 233: @@
 *These hot flue gases pass through a well-defined gap between a ‘skirt’, and the pot, resulting in a large percentage of the heat being forced against the sides of the pot, and being transferred to the pot. Where various sizes of pot are used on the same stove, the skirt can be funnel-shaped to accommodate different pots, although some efficiency will be lost.
-[[File:Rocket stove.JPG|thumb|left|200px|The rocket stove principle.|alt=Rocket stove.JPG]]<br/>
+{| style="width:100%;"
+|-
-[[File:Pic2.JPG|thumb|left|200px|A rocket-type stove in action, and showing insulation of the burning chamber, skirt around pot and support frame|alt=Pic2.JPG]]<br/>
+| [[File:Rocket stove.JPG|thumb|left|200pxpx|The rocket stove principle.|alt=Rocket stove.JPG]]<br/>
+| [[File:Pic2.JPG|thumb|left|300pxpx|A rocket-type stove in action, and showing insulation of the burning chamber, skirt around pot and support frame|alt=Pic2.JPG]]<br/>
-<br/>
+|}
 <br/>Today, most of the GIZ-promoted wood stoves follow this rocket stove principle (see fact sheets below for examples). Besides household stoves also stoves for institutional or productive purposes can incorporate the rocket stove principle. For example in Malawi, the considerable savings have made institutional rocket stoves very popular among school feeding programs (see also [http://www.ashden.org/media/films/192/watch Ashden Award video 2006]).
-[[File:Roth Malawi Institutional Rocket Stove 170-14 Comparison.jpg|thumb|left|400px|Institutional Stove Compared to an open Fire: 40 instead of 170 kg of firewood]] [[File:GIZ Roth Malawi-probec-school feeding.jpg|thumb|left|400px|School feeding program Mary`s Meals Blantyre, Malawi]]
+{|
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 = Wood Fuel Stoves with Forced Convection<br/> =

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 The reactor is emitting heat, but also light, gasses and particles. While the emission of heat is wanted, the emission of gasses, particles and light are rather unintended. Good stove designs can reduce the quantity of unwanted emissions in favor of additional heat generation. The heat does not enter automatically into a cooking pot. The design of the heat transfer unit has a big effect on the percentage of the heat transferred into the food to be cooked.
 <br/>
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 Overall there are two major dimensions for efficiency gains for firewood stoves:
-*Achieve complete combustion (=‘create more heat per unit of fuel used’)
+#Achieve complete combustion (=‘create more heat per unit of fuel used’)
-*Improve heat transfer (=‘get more heat actually into the pot’)
+#Improve heat transfer (=‘get more heat actually into the pot’)
 <br/>
 = Three-stone Fires or Open Fires =
-[[File:GIZ-Feldmann-Malawi-3-stone-fire.jpg|thumb|right|300pxpx|3-stone fire in Malawi]]Worldwide, millions of people cook on so-called 3-stone fires or open fires as this is the simplest and cheapest “stove” to create. Only three suitable stones of the same height are needed to balance a pot over a fire. However, the daily use of these 3-stone fires has the following disadvantages: &nbsp;
+[[File:GIZ-Feldmann-Malawi-3-stone-fire.jpg|thumb|right|300px|3-stone fire in Malawi]]Worldwide, millions of people cook on so-called 3-stone fires or open fires as this is the simplest and cheapest “stove” to create. Only three suitable stones of the same height are needed to balance a pot over a fire. However, the daily use of these 3-stone fires has the following disadvantages: &nbsp;
 High fuel consumption:<br/>The open fire consumes a lot of fuel as
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 <br/>
 = Three-stone Fire versus Improved Cookstove =
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 [[File:Roth Malawi Institutional Rocket Stove 170-14 Comparison.jpg|thumb|left|400px|Institutional Stove Compared to an open Fire: 40 instead of 170 kg of firewood]] [[File:GIZ Roth Malawi-probec-school feeding.jpg|thumb|left|400px|School feeding program Mary`s Meals Blantyre, Malawi]]
 = Wood Fuel Stoves with Forced Convection<br/> =
 Instead of naturally ‘pulling’ air through a stove by stack height, fans or blowers are useful to ‘push’ air into the combustion chamber. This enhances a good air-fuel mix and thus, more complete combustion. Electricity is the most convenient power source to create a forced air-flow. It can be provided by batteries or, if available, through the grid. Forced convection can reduce emissions of stoves by up to 90&nbsp;%, thus alleviating Indoor Air Pollution (IAP) levels. See also the article on[[Gasifier Stoves|Micro-Gasifier Cookstoves]]. Recently, thermo-electric generators (TEG) have been developed to power fans in stoves. They use the temperature differences within the stove to generate electricity, thus eliminating the need for external power supply. TEGs also have great potential to provide power to other applications, such as LEDs or mobile phones. However, the unit makes a stove more expensive and can be destroyed easily, when getting too hot. Pico PV units could also easily provide that little electricity needed for mobile charging without burning firewood.<br/><br/><br/>
 = Stove Factsheets and Manuals =
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 *[[:File:Final-inst metal rocket stove malawi-2008.pdf|Institutional Metal Rocket Stove]], Malawi (2008)
 *[[:File:GIZ HERA 2011 Inkawasi-Port til Peru.pdf|Inkawasi portatil]], Peru (2011)
 <br/>
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 [[Category:Cooking_Energy]]

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 = Three-stone Fires or Open Fires =
-Worldwide, millions of people cook on so-called 3-stone fires or open fires as this is the simplest and cheapest “stove” to create. Only three suitable stones of the same height are needed to balance a pot over a fire. However, the daily use of these 3-stone fires has the following disadvantages: &nbsp;
+https://energypedia.info/images/6/6f/GIZ-Feldmann-Malawi-3-stone-fire.jpgWorldwide, millions of people cook on so-called 3-stone fires or open fires as this is the simplest and cheapest “stove” to create. Only three suitable stones of the same height are needed to balance a pot over a fire. However, the daily use of these 3-stone fires has the following disadvantages: &nbsp;
 High fuel consumption:<br/>The open fire consumes a lot of fuel as
@@ Line 58: / Line 58: @@
 *Health risks:<br/>As the flames are not directed or shielded, the cook can easily catch fire when approaching the cooking pot. Sparks pose an additional risk when approaching the fire. Burns are a common effect of open fires. The smoke might also cause eye infections.
-[[File:GIZ-Feldmann-Malawi-3-stone-fire.jpg|thumb|left|300px|three-stone fire in Malawi]]<br/>
+<br/>
 On the other hand, users welcome some of these inefficiencies due to their positive side effects:
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 |}
+<br/>
 = <br/>The Rocket Stove Principle<br/> =
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 *[[:File:GIZ HERA 2011 Inkawasi-Port til Peru.pdf|Inkawasi portatil]], Peru (2011)
+<br/>
 = Further Information<br/> =
 *<span style="color:#FF0000">Classification of Cookstoves</span>
-*[[Cooking_with_Firewood|Cooking with Firewood]], article on energypedia
+*[[Cooking with Firewood|Cooking with Firewood]], article on energypedia
 *[[Energy-Saving Cooking Equipment|Energy-Saving Cooking Equipment]]<br/>
 *[[Portal:Improved Cooking|Improved Cooking Portal]] on energypedia
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 &nbsp;<br/>
 = References<br/> =
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 <br/>
 [[Category:Cooking_Energy_Compendium_(GIZ_HERA)]]

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 *[[:File:Final-inst metal rocket stove malawi-2008.pdf|Institutional Metal Rocket Stove]], Malawi (2008)
 *[[:File:GIZ HERA 2011 Inkawasi-Port til Peru.pdf|Inkawasi portatil]], Peru (2011)
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 *<span style="color:#FF0000">Classification of Cookstoves</span>
 *[[Energy-Saving Cooking Equipment|Energy-Saving Cooking Equipment]]<br/>
 *[[Portal:Improved Cooking|Improved Cooking Portal]] on energypedia
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 **[http://www.rocketworks.org/ Rocket Works]
-*Stove Images - a Documentation of Improved and Traditional Stoves in Africa, Asia and Latin America. By Beatrix Westhoff and Dorsi German (1995). It is available in [[:File:Stove_Images.pdf|English]], [[:File:Foyers_en_Images.pdf|French]] and [[:File:Estufas_en_Imágenes.pdf|Spanish]]. The publication provides a very comprehensive overview on global stove diversity.
+*Stove Images - a Documentation of Improved and Traditional Stoves in Africa, Asia and Latin America. By Beatrix Westhoff and Dorsi German (1995). It is available in [[:File:Stove Images.pdf|English]], [[:File:Foyers en Images.pdf|French]] and [[:File:Estufas en Imágenes.pdf|Spanish]]. The publication provides a very comprehensive overview on global stove diversity.
 *UNESCO (1982): [http://unesdoc.unesco.org/images/0005/000530/053052eb.pdf Consolidation of Information. Cooking Stoves Handbook]
 *[http://www.bbc.co.uk/programmes/p038cs37?ocid=socialflow_facebook Changing Climate Change: Solutions]. BBC Documentary on portable ceramic cookstoves in Malawi used with a TEG.