Difference between revisions of "Welcome to Appropedia/Selected page/20"

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{{Portal:Construction and materials/Selected page/Layout
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{{:Welcome to Appropedia/Selected page/Layout
   |image=WW-TLas200x200.gif
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   |image=Solar heater.jpg
 
   |size=
 
   |size=
   |caption=This is what it looks like when finished.
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   |caption=Solar heater
   |text=<div Style="padding-left:10em">'''Welding wood'''. This is a technique to join wood using scrap tin, such as that from a used can. Needed materials include:
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   |text='''Solar hot water''' describes active and passive solar technologies that utilize the sun’s freely abundant [[solar thermal energy]] in order to heat water for a desired application. It is one of the most efficient ways to heat water (in terms of energy/waste), as it requires no energy conversion, unlike electric-resistance heating or fuel burning. It is a simple transfer and concentration of heat energy from one place to another. Another interpretation of the efficiency of the practice is that the solar energy is free, and only dependent on the extent of the technology used, and its cost and efficiency.  In other words, the energy is free, only the collection, conversion, and storage devices cost.    
::1. Two sticks of wood to be joined.
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:::* Make sure the wood is in good condition where the connection is to be made. It should be clean, no bits of bark or loose paint, and no knots, as they are too hard for nails.  
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If you have ever felt hot water trickle out of a garden hose that’s been sitting in the sun, you’ve experienced solar hot water in action. Essentially, a solar hot water system is made up of a [[Solar hot water - system types|solar thermal collector]], a well-insulated storage container, and a system for transferring the heat from the collector to the container vis-à-vis a fluid medium, which in some circumstances is the water to be used itself.
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  |link=Solar hot water
2. Two pieces of thin tin.
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   |archive={{{archive|Welcome to Appropedia/Selected page}}}
* For the first bond, use a knife for cutting the tin from a small can for example.
 
* Length and width equal to the stick diameter.
 
3. One piece of [[Harvesting_sheet_metal|sheet metal]].
 
* For the final bond, use the tip of an axe or chisel for cutting the sheet metal from an oil drum for example.
 
* Width 3x the stick diameter; Length 6x the stick diameter.
 
4. Some small, ~1 cm, nails for the first connection.
 
5. Some larger, ~2.5 cm, nails for the final connection.
 
   |link=Weld wood
 
 
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[[Category:Construction and materials portal|{{SUBPAGENAME}}]]
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[[Category:Welcome to Appropedia|{{SUBPAGENAME}}]]
 
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Latest revision as of 23:14, 22 June 2012

Solar heater
Solar hot water describes active and passive solar technologies that utilize the sun’s freely abundant solar thermal energy in order to heat water for a desired application. It is one of the most efficient ways to heat water (in terms of energy/waste), as it requires no energy conversion, unlike electric-resistance heating or fuel burning. It is a simple transfer and concentration of heat energy from one place to another. Another interpretation of the efficiency of the practice is that the solar energy is free, and only dependent on the extent of the technology used, and its cost and efficiency. In other words, the energy is free, only the collection, conversion, and storage devices cost. If you have ever felt hot water trickle out of a garden hose that’s been sitting in the sun, you’ve experienced solar hot water in action. Essentially, a solar hot water system is made up of a solar thermal collector, a well-insulated storage container, and a system for transferring the heat from the collector to the container vis-à-vis a fluid medium, which in some circumstances is the water to be used itself. Read more...