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CCAT rocket stove

2,007 bytes added, 04:24, 20 November 2017
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{{Topic content|Improved cook stoves}}
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This [[Improved cook stoves|Improved Fuel Stove]], or Rocket Stove, is the final project for [[Engr305|Appropriate Technology]] class at [[Humboldt State University]]. The project goal is to construct a demonstration rocket stove for the [[Campus Center for Appropriate Technology]] on the campus at of Humboldt State University. The rocket stove will serve as an example of improved fuel stove technology and development; students and public touring the center will learn about the design, function and need for improved fuel stoves around the world. The rocket stove will also enable the residents of the center to cook with traditional [[biomass]], reducing their dependence on petroleum based forms of energysources. It is important to note that rocket stoves are designed for populations around the world who still depend on biomass for their cooking fuel. The use of rocket stoves in developed nations is not necessary. Developed nations using modern cooking methods are not faced with health and environmental issues related with traditional cooking methods. The improved [http://fireforless.com/ fuel stove] was designed, built and tested by Daniel Moyer and Tyler Jones.
Populations continue to increasingly rely on biomass for cooking fuel, thus hindering the next step toward modern cooking methods. Populations in developing nations want the same modern, self cleaning, convection, downdraft stove found in American suburbs. Many people argue that modern cooking methods are more appropriate. Modern cooking methods are efficient at fuel conversion and produce less atmospheric particulates, however the dependence on petroleum hinders the appropriateness of modern cooking methods.
Improved cook stoves are an attempt to address the negative environmental and social effects of the three rock fire. Improved Stoves increase efficiency of fuel consumption and reduce the amount of pollution released into indoor cooking environments. Improved fuel stoves designs are constructed with metal housing and insulating materials enclosing the fire. Improved fuel stoves improve heat transfer and fuel combustion, resulting in an efficient clean burning wood stove.
== Design ==
== Testing ==
Testing is essential to rocket stove projects. Testing should happen throughout the entire life of a stove project. The evaluation of improved stoves helps determine if the model is marketable, whether production costs are as low as possible, and if improvements are needed. "Careful testing of stoves has resulted in a more accurate understanding of how to make a better stove. Without experimentation and testing, the development of a stove is based on conjecture". Technical advances in energy efficiency alone will not ensure success. Stove programs must be complemented by appropriate project design, implementation and proper institutional support. Without proper testing, stove programs will have unrealistic expectation of the efficiency of improved stoves. Stove programs can overestimate the efficiency of improved stoves when tested in a controlled lab setting. Improved stoves never do as well in real households. "The fuel savings that can be attained in a laboratory often have little relationship to savings possible under field conditions" <ref name="Barnes" >Barnes, Douglas F. "What Makes People Cook With Improved Biomass Stoves." Worldbank.org. World Bank. Web. 03 Oct. 2011. <http://www-wds.worldbank.org/external/default/WDSContentServer/WDSP/IB/1999/08/15/000009265_3970311122727/Rendered/INDEX/multi_page.txt>.</ref> . Many stove programs in controlled lab settings achieved a 75% reduction in fuel consumption. After examination of early stove programs, fuel efficiency expectations of improved stoves have been substantially reduced. "Most people in the stove community now agree that a 50% decrease in fuel consumption should be considered a major achievement and that should be content with a savings of 25% or even less" <ref name="Barnes" />. Laboratory settings can be valuable with designing and initial testing of improved stoves; testing in field conditions can ensure the final product is built and designed correctly. Producing a stove design that adheres and conforms to local culture is vital in ensuring a successful stove program.
===Types of Testing===
== Update ==
Logan Ward and Erik Rasmussen
In On September 201111, we revisited visited the rocket stove at CCAT to check on how it's doing and update the page a little. The stove is in decent condition but there are a few areas that the stove could be improved. The rocket stove has gone through a few very minor changes since its creation. Recently, it received a fresh paint job. Also, the chimney has been lengthened considerably. As you can see from previous pictures, the original chimney was rather short. The new chimney is much taller and has a cap on the top. Dan We also printed and left a laminated an informational piece to hang around the chimney and let people know what the rocket stove is and information about rocket stoves in general.
== Updated Testing ==
We met up with Dan and tested the stove. It appeared as if the stove hadn’t been used in quite a few years.
My project partner and I met up with Dan and tested *The first step was to wash the stove. It appeared as if the stove hadn’t been used in quite a few years. cookpot
-The first step in the testing was *Then, we gathered pieces of kindling 1’ to wash the pot since it was so dirty1.5’ long. The kindling weighed a total of . 44 lbs
-Next*After that, we gathered pieces of kindling roughly 1’ to 1.5’ longfilled the pot with water and placed it in the skirt
-After that*Next, we filled started burning the pot with water and placed it pieces of wood in the skirtcombustion chamber. We also added dead grass to the kindling.
-Next, we started burning the pieces of wood in the combustion chamber. We also used some dead grass in addition *The water came to the kindlinga rapid boil within 7 minutes and 25 seconds.
-After a short while the *The water began to boil and 's temperature was brought to a rapid boil within 7 minutes and 25 seconds. Not bad for a stove that hasn’t been used in yearsmeasured at 150 degrees Fahrenheit.
There is We observed a few problem areas we observed. The vermiculite used to insulate the combustion chamber is old and could be replaced. Also, there are small gaps around where between the combustion chamber and the metal case meet with of the barrel, which may have decreased the concentration of the heat around the pot and the low temperature of the boiling water. These gaps could easily be filled in by some kind of heat resistant sealant. Also , it was unclear if the addition of the longer chimney improved the flow of gasses or not. As noted earlier the chimney should be short, reaching just above the cookpot so the lengthened chimney might have actually hindered the flow of gassesgases. Also , the bricks in the combustion chamber may need some replacing as well. If this stove was being consistently used, it would probably be a good idea to address these concerns as you would want your stove in prime running condition. <gallery>Image:rocket_stove1.jpg|Fig 1: Erik and Dan feeding the stoveImage:rocket_stove2.jpg|Fig 1a: View inside the beastImage:rocket_stove3.jpg|Fig 1b: Temperature readingImage:rocket_stove4.jpg|Fig 1c: View from above without the cookpotImage:rocket_stove5.jpg|Fig 1d: Laminated information hanging from the stove</gallery> == October 2014 Update ==Updated by Jacob Carroll-Johnson and Carlos A. Sanchez It looked like the rocket stove has not been used in quite some time. Reasons for not using the rocket stove is easy of use. Its difficult to light and once it is lit it's hard to stay lit. The bottoms of pots get scorched. It also becomes very smokey when using. The weather has taken its toll on it. I was bummed out that we couldn’t test it out and see actual results. We are planning on going back to do some testing and see how it compares with when it was first built.We will post results once we run some tests.  We proceed with the analytical analysis. The first thing that we noticed was the smoke flute and the laminated information were gone. Rust has taken its toll on the stove.The top and bottom have taken the most hit from it. There are some holes from the rust going all the way through the top. So the top will soon need to be replaced. The bottom also has been affected. It appears that the rust has eaten the metal, and is now really thin at the bottom. No holes yet but maybe in the near future. There doesn't seem to be much continuity of the rocket.Moving on to the combustion chamber. The heat resistant sealant that was used to seal the ceramic bricks is almost completely gone. The bottom brick is also in bad shape. When we wiggled the bottom brick we saw that only one big chunk moved. We also noticed that the back part of the combustion chamber had cracks. Test results will be posted soon.  <gallery>Image:DSC 4950.JPG|Fig 1: General viewImage:DSC 4936.JPG|Fig 1d: RustImage:DSC 4937.JPG|Fig 1a: Rust holes on topImage:DSC 4940.JPG|Fig 1b: Combustion chamberImage:DSC 4952.JPG|Fig 1c: Back wall cracks </gallery>
== See also ==
== References ==
 [1] Barnes, Douglas F. "What Makes People Cook With Improved Biomass Stoves." Worldbank.org. World Bank. Web. 03 Oct. 2011. <http:references//www-wds.worldbank.org/external/default/WDSContentServer/WDSP/IB/1999/08/15/000009265_3970311122727/Rendered/INDEX/multi_page.txt>.
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