New book - 'Building a Better World in Your Backyard' - on Kickstarter (sponsored friend)

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Sharing knowledge to build rich, sustainable lives.

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

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Contributors have made 393,798 edits and uploaded 31,583 files.
Browse our categories or all 8,311 articles.

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Announcements — more

Bwb-book-mockup-no-bg.png New book Building a Better World in Your Backyard Instead of Being Angry at Bad Guys Check currently being funded on Kickstarter. (sponsored friend).


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DC circuit analogy: 1 Tank 2 Parallel Blenders

Electricity basics. Some basic definitions, equations and analogies of electricity.
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Greywater Ecuador La lagrima purificadora

A detailed greywater system at Centro Orgánico Finca Sarita, an Ecuadorian seed saving center.

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Community action news

Southwark1.jpg

Apr 15 UK Climate news: Thousands block roads in Extinction Rebellion protests across London [1]

Apr 3 Climate news 2019: Parents around the world mobilise behind youth climate strikes [2]

Apr 2 City Of Sydney Announces 100% Renewable Energy Target [3]

Mar 29 Amsterdam: A Modest Proposal to Eliminate 11,000 Urban Parking Spots [4]

Mar 22 Community involvement USA: How the simple act of sharing a meal is creating community change [5]

Read More...


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Architect Eliel Saarinen
Always design a thing by considering it in its next larger context – a chair in a room, a room in a house, a house in an environment, an environment in a city plan.

Eliel SaarinenW
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Hot topics / In the news

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Blog

The Sun photographed by the Atmospheric Imaging Assembly (AIA 304) of NASA's Solar Dynamics Observatory (SDO).
Solar energy, radiant light and heat from the sun, has been harnessed by humans since ancient times using a range of ever-evolving technologies. Solar radiation, along with secondary solar-powered resources such as wind and wave power, hydroelectricity and biomass, account for most of the available renewable energy on earth. Only a minuscule fraction of the available solar energy is used.

Solar powered electrical generation relies on heat engines and photovoltaics. Solar energy's uses are limited only by human ingenuity. A partial list of solar applications includes space heating and cooling through solar architecture, potable water via distillation and disinfection, daylighting, solar hot water, solar cooking, and high temperature process heat for industrial purposes.To harvest the solar energy, the most common way is to use solar panels.

Solar technologies are broadly characterized as either passive solar or active solar depending on the way they capture, convert and distribute solar energy. Active solar techniques include the use of photovoltaic panels and solar thermal collectors to harness the energy. Passive solar techniques include orienting a building to the Sun, selecting materials with favorable thermal mass or light dispersing properties, and designing spaces that naturally circulate air.

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ENGR 215 Introduction to Design projects – Spring 2012: Friends of the Dunes: The Spring 2012 semester of Engineering 215 worked with Friends of the Dunes to design and build projects that support the Humboldt Coastal Nature Center at 220 Stamps Lane, Manila, CA.

Spring 2012 ENGR 215 Intro to Design Projects - Humboldt Coastal Nature Center
Solar Powered Trail Lighting System
Solar trail lighting  
Carbon Footprint Wheel
Educational carbon footprint display  
Living Green Roof
Green roof educational model  
Acoustic Panels
Acoustic panels utilizing re-purposed materials  
Living Green Display
Interactive display promoting environmental consciousness  
Rapid Composter
Rapid composting system  
The Stretchbarrow
Hybrid stretcher/wheelbarrow  
The Sandy Cove
Amphitheater constructed of urbanite  
Pump Powered Dune Movement Simulator
Interactive sand dune model  
Beachgrass Baler
Tool to bale beach grass  
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Topics
Energy

Solar
Water
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New pages being developed:
  1. Apiary design for a forest garden
  2. Rainwater Catchment-Solar Pump System/OM
  3. Abaxial
  4. Open press project
  5. CCAT rainwater catchment solar pump system/OM
  6. Jane's Walk
  7. Lifecycle and Economic Analysis of standard Czochralski-Si and multicrystalline black-Si PERC Literature review
  8. Lasersaur Rebuild to Orginal
  9. Gooseberries
  10. White gooseberries

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