Sunday, January 2, 2011

Passive Solar Energy

What is passive solar energy? The use of energy from the sun without the help of photovoltaics is reffered to as passive solar energy. Passive solar energy methods are a great way to make use of clean and inexaustible energy from the sun. Methods of passively collecting solar energy include solar ovens and well-planned indoor heating techniques.
Solar Ovens

Solar ovens are much like conventional ovens, and are ideal when the food to be prepared does not need to be prepared quickly or heated to extreme temperatures. Solar ovens are extremely-well insulated boxes, which can consist simply of a clean cardboard box surrounded by layers of insulation and aluminum wrapping. These solar ovens make use of solar energy in very hot and dry locales. Solar ovens require long periods of expose to the sun, and cook foods at lower temperatures and slower rates than convention ovens, but this method of passive solar power use is very inexpensive and has freed many from total dependence on energy from the power greed for their cooking needs.

Solar ovens are also a great passive solar energy source for those on long trips that who are exposed to lots of direct sunshine. The use of solar ovens is an appealing alternative to eating cold woods when on long trips where electricity is not available.
Passive Indoor Heating

Passive Indoor Heating is an excellent way to make use of passive solar energy and cut down on one's energy bills in the wintertime. Passive Indoor Heating requires careful planning in home construction and foresight in regard to the advantages of passive solar energy. During home contruction, with a careful eye to the positioning of windows, one can take advantage of the wintertime sun to provide optimal warmth by shining through the windows for the longest fraction of the day as possible. It is also possible to take advantage of passive solar energy techniques in an already-established home by trimming trees that block sunlight from entering your windows. Keeping the house well-insulated and the doors and windows sealed can make good use of the sun's warmth passively and reduce one's reliance on electricity from the city.
Trombe Walls

Trombe Walls make use of sunlight to heat homes and places of business using the energy of the sun. Read more about Trombe walls here.