Introduction and definition of solar energy


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Solar energy
Keywords: panel, solar, thermal, photovoltaic, energy, clean, panels, solar, renewable, sun, ray, inexhaustible

Introduction

The sun "shines" on Earth each year 40 000 times the energy needs that humanity consumes the form of fossil fuels.

Despite this, solar power remains a relatively untapped area.

Nevertheless the collective awareness make a fresh energy future (even if it is known and used for thousands of years).

Thus Germany is investing heavily in this energy and Freiburg, on the Alsatian French border, has become the "capital of the sun" not to say the "capital of the Sun".

There 3 uses of solar energy:

  • heat production: the "thermal solar"
  • electricity generation: the "solar photovoltaic"
  • producing a movement: the "mechanical solar".

Much research is underway in these areas 3, mainly to photovoltaics.

Indeed, the efficiency of photovoltaic cells is quite low, in the order of 20% maximum for military uses and to 10 15% (most) for civilian uses. Low yield that many improvements are possible in this area. And solar photovoltaic research is short ...

Solar thermal is more common than photovoltaics, rates and therefore the profitability of photovoltaics is so weak (not to mention the energy storage issues) it is generally limited to isolated sites ...


The 3 kinds solar energy in more detail:

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