¶ … attic fan is an essential part of a building in that it helps in the regulation of the temperature of a building by reducing the heat energy level in a building's attic. It does so by getting rid of the hot air that is accumulated in a building.
The attic fan helps in the regulation of temperature by the exhaustion of the hot air by through the blade action. Due to the fluctuating nature of the temperature, it is necessary for the fans system to be automated by employing thermostats. An attic fan even though is surrounded by a number of controversies as regards its effectiveness in energy conservation, still remains to be an integral part of a building's design as ventilation to every space in a building is of utmost importance.
TABLE OF CONTENT
Introduction
History of the Photovoltaic cell (Solar Panel)
The construction of the solar panel
Photovoltaic systems in residential homes
Operation mechanism of an attic fan
Determination of the attic ventilation requirement for the attic fan
The attic fan design
Conclusion
15'Bibliography
Introduction
An attic fan is a necessary part of any home whose owner intends to achieve the necessary and proper ventilation and moisture level. Due to the current energy crisis that has hit the world couple with the global economic crunch, it has become necessary for governments, corporations and individuals to devise newer methods and techniques that rely on alternative energy sources. The solar energy for example is one of the best renewable sources of energy that can be utilized in the achievement of the necessary electrical power to drive both domestic and industrial devices such as fans used in the ventilation systems.
Apart from being an affordable source of electrical energy, the solar also offers an environmentally friendly alternative in that it does not emit any form of wastes that have always been associated with other energy sources such as coal and nuclear sources.
When the room temperature rises above 80 "F, t become uncomfortable to stay in the room.Therefore, it becomes necessary to invest in some for of an air conditioner. The advent of the solar powered attic fan brings peace of mind to a home owner in that he can decide to shut the windows and turn on the fan with the knowledge that the device can help in getting rid of the excess heat in the rooms while saving him over 35% on costs associated with home cooling.
The rise in temperature in the houses with attics is caused by the super heated air that gets trapped in the attic and then gets redistributed in the lower rooms through conventional air circulation.
History of the Photovoltaic cell (Solar Panel)
The word "photovoltaic" is derived from the Greek word ph-s which means "light" while the "voltaic" part of the name is which means electricity is derived from Volta, an Italian physicist.
The operation of the solar panel is dependent on a phenomenon referred to as the photo-voltaic effect which was discovered way back in 1839 by Becquerel, a French physicist. The building of the first solar cell however was actualized in 1883.That fete was achieved by Charles Fritts.He built the very first photovoltaic cell by coating the junction of Selenium, a semiconductor with a very thin layer of gold. The junction formed is what exhibited the first characteristics of a photovoltaic cell in history. It is worth noting that the efficiency of the first construction was just a mere 1%.It is the work of Sven Ason Berglund that led to the increase of efficiency of the solar cell. Sven had a series of patents that were geared towards increasing the efficiency of the photovoltaic cell. In 1946; Russell Ohl came up with the modern junction semiconductor. He patented the invention which he discovered as he worked on a sequence of experiments that lead to the development of the first transistor, a device that has indeed revolutionized modern electronics.
The modern day solar panel technology was discovered accidentally in 1954 at the Bell laboratories. While doing an experiment on semiconductors in the Bell labs, it was accidentally discovered that the doping of silicon with particular dopants (impurities) resulted in substance that was very sensitive to light. It was the work of D. Chaplin, C Fuller and G. Pearson that led to the invention of the first device capable of transforming energy of light into electricity. The result of this was an increase of the photo cell with an efficiency of 6%, which was high at...
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