Learn how to use SHADOWS!
To get the entire facade in winter heated by the sun, look for the minimum angle of the sun at noon on the winter solstice. As explained in previous post (I) this angle is 90 – latitude of the place – 23 degrees. The schemes are based on an example in latitude 40 ° N or S.
If you have a hood with this inclination, in winter will be completely parallel to the sunlight low trajectory. It does not produce any shadow on the facade, heating in winter, in the middle of the day. A free thermal energy you can not miss.
As the sun begins to raise up, the hood shades the top of the facade and allows to illuminate the bottom. A commitment of sun and shade in medium spring temperatures.
At midday summer, sun visor gets completely shading the front, avoiding heated through solar radiation. There will be less heat inside the farm or rural housing. To get the full shading, the hood must be wide enough, which I will explain in the next post (and III) in this series.
Use the direct heat of the sun, or avoid it. It is a very economical to save on heating or cooling, especially if there is little money available and whether to bring this energy with renewable energy.
In the next post (and III) will conclude with some more practical solutions to the design of the hood.
Does your place in the field take all the sun and shadows? Do you see possible on your farm? Your views may be useful for other farmers.
- Use Sun and Shadow in your Rural Building (I) (albertcampi.me)
- Renewable energies are Rural, not urban (albertcampi.me)
- Rural Camping with Solar Hot Water (albertcampi.me)
- Eaasy #2 Book Review – Rural Renaissance (envirowriters.wordpress.com)
- Famous astronomer eyes cheap solar power (newscientist.com)