The condensed solar or concentrated hydrogen.
Keywords: hydrogen, H2, solar, thermal, photovoltaic, energy, clean, panels, solar, renewable, sun, ray, inexhaustible
Why is it interesting to focus or "condense" (abusive term) solar energy and more generally renewable energies?
There are mainly two reasons for this: a temporal cause and a physical cause.
a) Temporal Cause.
Units of renewable energy production is dependent on climatic hazards and especially day-night cycle. Thus, a renewable energy source is rarely is maximum when it needs it most ... Example: photovoltaic panels powering light bulbs at night they produce nothing (or almost). It is therefore necessary to be able to store this energy.
b) Cause physical.
All sources of renewable energy (almost) are sources of diffuse energy, ie their energy potential, based on the catchment area is relatively low.
A simple calculation based on solar PV will allow you to see more clearly.
- a solar panel m2 on average per year 1300 thermal kwh or 200 electric kwh about. (see Deposit and solar potential in France)
- an average car (electric in this case) needs 0,15 kwh mechanics per kilometer (based on an equivalent fuel consumption 6L / 100 and vehicle performance 25%). Given the electric motor efficiency (80%) it takes about 0,19 kWhe per km.
- Assuming no loss of storage in the battery (the reality is different): a panel of m2 therefore allow the car storage, browse 200 / 0,19 = 1052 km ... the equivalent of 63 fuel L.
Why solar hydrogen?
In summary the preceding paragraph: 1 m2 photovoltaic panel will produce, for an electric car, fuel 63L equivalent over a year ... It is a very long time to finally little energy.
The disadvantages of renewable energy explained by a) and b) clearly show the interest to focus or concentrate solar energy even more that there are other drawbacks to renewable energy.
One of the most interesting way to focus renewable energy is creating solar hydogène (From water most of the time) which no longer becomes a source of energy but a vector ...