Solar power
The sun delivers an incredible amount of energy to our earth every day. In order to achieve the energy turnaround, everyone agrees that this energy must be harnessed.
But how much energy can be provided by solar energy in Germany? And what do you do at night or in winter?
Estimation of the contribution of solar energy
With the help of the efficiency of 20% and the irradiated solar energy of approx. 1000 kWh/m2 one can calculate, if one assumes that all roof surfaces in Germany are covered with photovoltaics and 1% of the surface of Germany, that 28kWh per day and person can be generated by solar energy.
The access over the efficiency is a good possibility in the physics instruction to practice this and to make at the same time the so important estimations.
>>Worksheet: Estimation of the contribution of solar energy
Solar energy performance: why the sun should shine at night
As large as the energy generated by photovoltaics is, photovoltaics has the decisive disadvantage that the energy is generated very unevenly - at night and in winter there is simply no or little sunshine.
In this worksheet, this problem is addressed and calculated with the size of the power and this size is thus practiced more deeply.
>>Worksheet: Solar energy performance: why the sun should shine at night