To build a biodigester may seem difficult and expensive, but a South American company built one at a very cheap cost ($120 USD +-) and documented the whole process so that anyone can build one.
If you have a farm or you are planning on getting one, even though it is not that big, o [...]
This is a simple solar furnace, the type of concentration that can generate temperatures high enough to melt aluminum and other metals. Following the instructions detailed below you can build a solar oven the size you want.
It consists of small mirrors that stick on one end with silicone and then are adjusted by a bolt [...]
We get hundreds of mails asking how to build a homemade solar water heater.
That’s why I want to share with you this solar heater very kindly Ricardo Jorge Leguizamón, a reader of this page, sent us.
The materials used were as follows (see the number on the image to locate the position):
1. Wooden frame, 25 × [...]
Blogs del Grupo: Energía solar, Un Blog Verde, Solar Energy Companies, , Best Green Blog Energia Solar
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