Sea water exampleThe sea water desalination is used as an example, how different electric power storage systems can influence the price for solar electricity.
To have a simple to calulate example, all is only for day/night balance. Weather changes and the change of the tilt of the eart axe. Just a very suny country near the equator. Simple desalinate each day as much sea water as electric power is produced.
Even 30 degree north or south are significant differences in yield between summer and winter. Also there are very dry coast areas where sea water desalination is necessary. Here it's possible to design the photovoltaic for 100% demand coverage at a winter day, than there are not useable excess in the summer. 45 degree north or south is the difference in sun irradiation between summer and winter so big, that this method would be complete nonsens.
Also at clody weather delivers a photovoltaic electric power, but significant less.
The possibility for an appropriate day/night balancing system at solar electricity increases the possible share of solar electric power at a sunny coast near the equaotr from 20% to 100%. In Germany would this only be an increase from 10% to 30%, but makes the fundamentals for seasonal storage. |