We continue to develop resources related to the COVID-19 pandemic. See COVID-19 initiatives on Appropedia for more information.

Difference between revisions of "Category:Improved cook stoves"

From Appropedia
Jump to navigation Jump to search
(added image (lonny not logged in))
(19 intermediate revisions by 9 users not shown)
Line 1: Line 1:
{{wikipedia p|Cook stove}}
{{cat header| 100_1328.JPG |Improved cook stoves| Please insert a brief topic summary here (take from the summary on the the topic page). }}  
:''This page refers to stoves using a fuel, usually solid. For solar versions, see [[:Category:Solar cooking|Solar cooking]]''
'''Cook stove''' is a general term for stoves used in developing countries, often of a very simple designs.
Efforts have been made in recent years to design and promote more efficient stoves. These are known by various names: '''improved cook stoves''', '''improved stoves''', '''improved cookstoves''', '''improved cook stoves''', '''smokeless stoves''' and '''wood conserving stoves'''. These designs, when they work as intended, don't fill the home with harmful smoke (through more efficient burning to reduce smoke, and a chimney or venting to remove that smoke), and use less fuel. Several designs have been developed. 
==Health impact==
Cooking and heating with solid fuels such as wood, dung, coal or crop waste over open fires or stoves without chimneys can lead to indoor air pollution. This indoor smoke contains carbon monoxide, benzenes, aldehydes, small soot and dust particles and other  health-damaging pollutants.
A WHO assessment found indoor air pollution to be the 8th most important risk factor for disease. It is a particularly important risk factor for acute respiratory tract infections (ARI) including bronchitis and pneumonia. Each year, IAP is implicated in the deaths of 1.6 million people ( a death every 20 seconds). Because women and children spend the most time near the domestic hearth, they are especially vulnerable <ref> [http://www.who.int/indoorair/en/ World Health Organization]</ref>.
Use of cleaner burning fuels, access to improved stoves and/or behavior changes could substantially reduce exposure to indoor smoke and associated diseases <ref>[http://ehs.sph.berkeley.edu/guat/page.asp?id=32 Randomized Exposure Study of Pollution Indoors and Respiratory Effects (RESPIRE) Trial]</ref>.
==Key design features==
Some or all of these design features help make a stove more efficient and lower in health impact:
*Chimney or vent - to remove smoke to outdoors, and improve airflow through the fire.
*Controllable air inflow - requires the fire to be in an enclosure with an adjustable inlet - allows reduction of burning rate to match needs.
*Use of a material with good insulating properties, for the inside walls of the stove - usually ceramic.
*Afterburning - mixing the flue (exhaust gas) with a small amount of new air, to allow the last remaining hydrocarbons and carbon monoxide to burn without a flame.
*Use of the flue gas heat for space heating (in cold climates) and/or water heating. To avoid leakage of flue gas into the room, a heat exchanger is needed. In an expensive product this may be a complex stainless steel device, or in a developing nation a simple metal flue pipe.{{sp}}
==Ongoing research and development==
Groups including the Kobus Venter's [[Vuthisa Technologies]]<ref>[[Vuthisa Technologies]] is a small company in Pietermaritsburg,  Kwa Zulu Natal, South Africa, and Kobus Venter discussed (or discusses) the development of the design on the [http://www.bioenergylists.org '''Biomass cooking stoves''' lists.{{expand}}</ref> and [[EWB San Francisco Professionals Chapter]]<ref>[http://ewbappropriatetechnology.blogspot.com/ EWB-SFP Appropriate Technology Design Team]'s blog, with a strong focus on improved stoves. See also [http://darfurstoves.lbl.gov/updates.html Darfur Cookstoves - Updates May-December 2006]</ref> are doing research into optimizing such stoves, including using briquettes made from waste biomass (e.g. agricultural waste) with a simple [[briquette press]].
The fuel used can have a great impact on the smoke produced, as well as affecting the environmental impact. {{WP|Charcoal}} is much cleaner burning than wood or dung, but is usually made from wood.
{{WP|Amy Smith}} has done work on producing charcoal from other forms of biomass. To make the biomass stick together, a binder is used. (Another method of making briquettes more cohesive is to leave the biomass in water for a couple of days to decompose slightly.) The choice of biomass depends on what is widely available, but includes {{WP|bagasse}} (sugar cane waste) bound with a paste of {{WP|cassava}} root (also called manioc or tapioca); and wheat or rice straw bound with a small amount of dung, in areas where pure dung is normally burnt.<ref>[http://youtube.com/watch?v=FwFkb1x7FJQ MIT's Amy Smith on third-world engineering: TEDTalks] - Video on YouTube.</ref>
==Footnotes and references==
==See also==
*[[Corn as fuel]]
==External links==
[[Category:Public Health]]

Latest revision as of 22:40, 12 August 2010

100 1328.JPG   
Please insert a brief topic summary here (take from the summary on the the topic page).
Topic page: Improved cook stoves

Pages in this category (listed below) may include subtopics, how-tos, projects, designs, organizations and more.