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Revision as of 14:17, 1 April 2021
Appropedia shares knowledge to build rich, sustainable lives (read our vision and mission).
Explore 9,336 resources and solutions for sustainability, appropriate technology, poverty alleviation, permaculture and more!
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Community Action for Sustainability News
- How can cities that rely on consumption recover from the pandemic, while reducing emissions? Here's some good ideas. Mar 24 [1] ...Manchester
- Spain to launch trial of four-day working week, Mar 15 [2]
- Climate Resilience Needs Community Roots, Mar 11. [3] "One message is clear: cities can better address climate challenges by embedding democratic principles, such as collaboration, power-sharing and transparency in their climate action work." ...Europe news
- A new direction for public engagement with energy and climate change, Mar 9 [4] ...Climate news 2021
- “When democracy is conducted at a human scale, it helps create what looks like superhuman wisdom.” How the state of Vermont does it, Mar 9 [5]
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The purpose of my project is to determine the cost inputs and energy outputs of small scale ethanol production from local and conventional sources. I decided to use local grown organic sugar beets farmed with bio-fueled agricultural equipment. In comparison to the costs of a local source, I also used conventional sugar transported from Mexico and sold at a local restaurant supply company. In addition, I made Amal's ethanol still to do the testing.
Ethanol is a grain alcohol that can be used as fuel in most four cycle spark ignition engines. The process of making ethanol begins by extracting the sugars from a sugar crop such as sugar beets, or converting the starches of crops such as corn or potatoes to sugars. Crops used for ethanol production are titled "feed stocks". Starch and sugar crops both have their benefits depending on the region that they are produced in. The benefit of sugar crops is that they require less energy input since no starches need to be converted. The benefit of corn is that it can store much longer than sugar beets before rotting. I am using sugar beets since they were the most appropriate crop for the season and region. The sugars are extracted by juicing the beets and boiling with water. Now the solution is called "mash" and it can be fermented and then distilled to extract the ethanol. Ethanol fuel can be used in most converted engines if it has a alcohol percentage greater than 80%. Due to ethanols strong ability to bind with water, no still can
remove the last 5% of water. Therefore the highest possible yield from a still is 95% ethanol. If blending ethanol with gasoline, all the water must removed to prevent separation of the gasoline and ethanol.Selected gallery
The Fall 2017 semester of ENGR215 Introduction to Design worked with Redwood Discovery Museum and the Humboldt Math Fest to and build learning exhibits without any screens for K-8th youth at their Eureka, CA location.
Xylophone
A demonstration physical relationships between wavelength and sound.
Numbers
A game featuring the first five digits of the Roman, Mayan, Chinese, and Greek number systems as wooden pieces.
Brachistochrone
A brachistrochrone race demonstrating the fast path between two points under the force of gravity.
Inspirograph
An upcycled spirograph made from bicycle parts.
Pythagorean
A physical demonstration of the Pythagorean Theorem using liquid.
Selected quote
A breeze came wandering from the sky, light as the whispers of a dream; He put the overhanging grasses by, and softly stooped to kiss the stream, The pretty stream, the flattered stream, The shy, yet unreluctant stream of wind.
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Appropedia is created by people like you! Feel free to contribute to Appropedia your original research, projects, current works, observations and wisdom. Improve articles by clicking "edit" on top of any page or section. Our philosophy is: BE BOLD and contribute!
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