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Revision as of 21:00, 12 July 2012 by RichardF (Talk | Contributions) (blog label)

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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 359,266 edits and uploaded 28,578 files.
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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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Hexayurt Project

The Hexayurt is a refugee shelter system that uses an approach based on "autonomous building" to provide not just a shelter, but a comprehensive family support unit which includes drinking water purification, composting toilets, fuel-efficient stoves and solar electric lighting.

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Marble bust of Aristotle.
Educating the mind without educating the heart is no education at all.

AristotleW
Estuaries and coastal waters are among the most productive ecosystems on Earth.
Water is vital for all known forms of life. Covering 71% of the Earth's surface, it is found mostly in oceans and other large water bodies. 1.6% of the total mass of the Earth's water is below ground in aquifers and 0.001% is in the air as vapor, clouds, and precipitation (rain, snow and sleet).

The Earth's water moves constantly through a cycle of evaporation and transpiration (evapotranspiration), precipitation, and runoff, usually reaching the sea. Over land, evaporation and transpiration contribute to the precipitation over land - thus deforestation and other changes to land can have wide and long-lasting effects through their impact on the water cycle.

Some observers estimate that by 2025 more than half of the world population will be vulnerable to a lack of water. Appropriate water supply and water purification technologies can help.

Related portal: Greywater
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ENGR 215 Introduction to Design projects – Spring 2011: Locally Delicious: The Spring 2011 semester of Engineering 215 worked with Locally Delicious to design, build, test and disseminate projects that support healthy lifestyles among youths grades 4th through 6th and their families.

Spring 2011 ENGR 215 Intro to Design Projects - Locally Delicious
Tear the Roof off
Dry sliced apples in 18 hours of sunlight with this legless solar dehydrator  
The GnomeTainer
Modular, raised garden with integrated rain catchment that can be installed on a porch  
Catch and Cook
A solar oven capable of reaching 160°F in 20 minutes  
Solar Bowling Oven
Solar oven kids can build and use on their own  
Wormland worm bin
Scalable vermiculture system from free materials for kids  
Row Blender
Row yourself a smoothie with an exercise powered blender  
Sodhoppers' Solar Dehydrator
Durable food dehydrator for a school from a waste kitchen cabinet  
Interactive School Garden
Modular school garden design incorporating several different garden styles  
The Solar Swing
Solar oven for a school reaching 200°F in 30 minutes  
School Worm Bin
Worm bin for a school built from a 55 gallon drum  
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