When politicians start talking about renewable energy, you know we have problems. Solar energy is a significant renewable energy. Here is an overview of solar energy history.
Solar energy is simply energy produced by harnessing the sun. It comes in many forms including electricity production through solar panels, home heating through passive solar systems and solar energy packets for powering devices like laptops and RVs to mention only a few platforms.
Historically, solar energy has been used by mankind to produce heat since we first built structures. Without electricity, mankind soon learned to orient structures to capture the heat of the sun during the day and store it in ceramic or mud materials much like a blacktop parking lot will radiate heat after the sun has gone down. Early Greek structures show a particular use of passive solar heating as do Egyptian structures.
The production of electricity using sunlight is a much more recent phenomena. In 1901, Nicolas Tesla was the first person to receive a patent related to solar energy, but he called it radiant heating. He sought a patent for a machine to capture the radiant heat, but nothing much came of the invention.
In 1904, some unknown physicist named Albert Einstein published a paper on the potential electricity production from sunlight. In 1913, William Coblentz received the first patent for a solar cell, but he could never make it work. In 1916, Robert Millikan was the first to produce electricity with the solar cell. For the next forty years or so, nobody made much progress because the cells were highly inefficient at converting sunlight to energy.
In the 1950s, Bell Labs got involved with NASA. Bell was charged with coming up with a solar energy platform to power spacecraft once they were in orbit. The solar energy field would never be the same.
Gerald L. Pearson, Daryl M. Chapin, and Calvin S. Fuller start researching different areas related to solar, but not active parts of the NASA project. By luck, they meet and exchange idea. While their individual projects were failures, their combined efforts produce a much more efficient solar cell using crystallized silicon to convert sunlight into electricity. The efficiency rate of the cells is roughly 6 percent, a marked improvement over previous technology. In 1958, NASA launches the Vanguard Spacecraft, which is powered by solar panels.
In the following years, solar energy technology grows in leaps and bounds. Solar panels today are roughly 15 percent efficient, but also much smaller than they use to be. More importantly, companies are abandoning the solar panel platform and coming out with amazing new products. The first are solar shingles that look exactly like regular roof shingles and perform as such. Nanotechnology is also offering amazing possibilities with quantum dots, which are essentially solar panels on the quantum level. Eventually, these dots will be incorporated in things such as paint. Yes, the paint on the walls of buildings and homes will eventually also produce all the electricity needed for the structures.
As this solar energy history demonstrates, man has used solar power for heat for a very long time. Only now, however, are we starting to master the technology to turn it into large amounts of free electricity.
Trackback: http://solar4us.blogspot.com/2010/06/solar-energy-history.html
