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Sharing knowledge to build rich, sustainable lives.

Appropedia is for collaborative solutions
in sustainability, appropriate technology, poverty reduction, and permaculture.

You are welcome to add to and edit Appropedia -
your site to find, co-create and improve the solutions we need. Our vision and mission.

Contributors have made 358,256 edits and uploaded 28,501 files.
Browse our categories or all 7,630 articles.

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Direct and diffuse solar radiation (Practical Action)
Solar thermal energy. The sun is the source of the vast majority of the energy we use on earth. Most of the energy we use has undergone various transformations before it is finally utilized, but it is also possible to tap this source of solar energy as it arrives on the earth’s surface.

There are many applications for the direct use of solar thermal energy, space heating and cooling, water heating, crop drying and solar cooking. It is a technology which is well understood and widely used in many countries throughout the world. Most solar thermal technologies have been in existence in one form or another for centuries and have a well-established manufacturing base in most sun-rich developed countries.

The most common use for solar thermal technology is for domestic water heating. Hundreds of thousands of domestic hot water systems are in use throughout the world, especially in areas such as the Mediterranean and Australia where there is high solar insolation (the total energy per unit area received from the sun). As world oil prices vary, it is a technology which is rapidly gaining acceptance as an energy saving measure in both domestic and commercial water heating applications. Presently, domestic water heaters are usually only found amongst wealthier sections of the community in developing countries.

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Corn Cob Charcoal Crusher

Turning corn cob agricultural waste into a cooking fuel that combats deforestation and indoor air pollution.

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Community action news

Budapest1.jpg
Jun 22 Experimental Community Organising – Transition Hungary [1]

Jun 19 Community energy: The Case for Local, Community-led Sustainable Energy Programs [2]

Jun 19 Community energy USA: How Electricity Cooperatives in the US are Paving the Way for a Renewable Future [3]

Jun 17 Costa Rica Could Reach 300 Days Running on Clean Energy [4]

Jun 16 New York City: New York’s new climate program includes making friends — seriously. Here’s why. [5]

Read More...


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Hansen at the Our Opportunity student summit in March 2009
A global tipping point will be reached in 10 years [ 2016 ] if levels of greenhouse gases like methane and CO2 are not reduced. Global warming at this point becomes unstoppable.

James HansenW
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Hot topics / In the news

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Sharing knowledge to build rich, sustainable lives.
Appropedia is the site for collaborative solutions in sustainability, poverty reduction and international development through the use of sound principles and appropriate technology and the sharing of wisdom and project information. It is a wiki, a type of website which allows anyone to add, remove, or edit content. Registration is encouraged but not required for contributors.

Appropedia has been described as an "appropriate technology wiki," but it is much broader than that - it is a green wiki, and a wiki for all matters of international development and aid. But most importantly, Appropedia is an open site for stakeholders to come together to find, create and improve scalable and adaptable solutions. For more about our motivation, see Appropedia:Mission.

To create a new project page, first browse the project articles and subcategories below for examples and check for possible collaboration opportunities, such as articles similar to what you're considering writing. If you are looking for ideas for your own project, check out our suggested projects. It is highly encouraged to tag your projects with their status -- you can do this with a few templates. Be Bold!

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ENGR 215 Introduction to Design projects – Fall 2010: HBCSL Somoa Hostel: The Fall 2010 semester of Engineering 215 worked with Humboldt Bay Center for Sustainable Living to design and build projects that support a proposed eco-hostel in Humboldt County.

Fall 2010 ENGR 215 Intro to Design Projects - HBCSL
Thermosyphon Solar Shower System
An outdoor shower that utilizes solar energy to heat the water  
Samoa Hostel Truth Tank
Provides greywater treatment system for a satellite solar shower  
Samoa Hostel Wattimus Prime
A metering scheme that monitors the amount of energy used by the visitors  
Can You Feel The Heatloss?
An education display about convection and heat loss  
Samoa Hostel Natural Paints
A natural paint display to educate visitors of the Samoa Hostel  
Pain in the Axle
A bicycle-powered electrical generator that powers a television and DVD player  
Samoa Hostel Windbelt
An array of wind belts that can charge a cell phone  
The Mechanical Munchy-Maker
A mechanical bicycle that generates energy to power a kitchen appliance  
Samoa Hostel Insulation Station
Educates visitors about the effectiveness insulation types and their relative costs  
Samoa Hostel greywater island
Models, designs, and educates guests and implementers of hostel size greywater treatment  
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Selected categories

Topics
Energy

Solar
Water
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Construction zone — correct mistakes & flag spam as needed

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Under construction
New pages being developed:
  1. IRC
  2. Open Source Multi-Head 3D Printer for Polymer-Metal Composite Component Manufacturing
  3. Factors effecting real-time optical monitoring of fused filament 3D printing
  4. Technical Solar Photovoltaic Potential of Scaled Parking Lot Canopies- A Case Study of Walmart U.S.A.
  5. Project Green Umbrella
  6. Energy Payback Time of a Solar Photovoltaic Powered Waste Plastic Recyclebot System
  7. RecycleBot Modification
  8. Rainwater calculators
  9. Hidden non-vegetarian ingredients
  10. Gravity fed drip irrigation, automated

Note: Appropedia's newest pages may not yet comply with our policies. Page titles in italics are "redirects," often created when moving a page.

Under construction

Create a new page:

  1. Nutrition
  2. Bacteria‏‎
  3. Human development
  4. Environmental science
  5. Open sustainability
  6. New Urbanism‏‎
  7. Building management systems
  8. Science‏‎
  9. Microgeneration
  10. Environmental design

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We want your projects, current works, observations and wisdom! See Contributing content. Improve articles by clicking "edit" at top of the page or section. Our philosophy is: Be Bold and contribute!

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