Experiments: Hydropower

With this turbine with integrated generator, available e.g. at common online retailers, some tinkering talent, a cut open PET bottle and hose material from the hardware store, different experiments for voltage generation with water can be carried out.

Assembly video: https://youtube.com/shorts/tYK3Ik25I4E

Air bubbles in the hose hinder the rotation of the turbine, so it is best to fill the water in quickly and in a gush.

An LED with series resistor is connected and made to glow by the water.https://youtube.com/shorts/C15yBcxem64?feature=share

By raising and lowering the water inflow, it can be shown that the brightness of the LED depends on the drop height.

In most halls, you can also connect the turbine directly to the water tap on the console. To do this, it is best to change the tap attachment there. Then you can easily make a light bulb glow and thus illustrate the power plant with several hundred meters of height difference.

• Sendung mit der Maus from the pumped storage plant -  https://kinder.wdr.de/tv/die-sendung-mit-der-maus/av/video-wie-funktioniert-ein-pumpspeicherwerk-100.html 
  Unfortunately with errors in the technical language (force/balance instead of energy)
• This ScienceSlam explains energy conservation/energy devaluation among other things at the hydroelectric power plant. Unfortunately very strong focus on energy https://www.youtube.com/watch?v=qRMnpV5E5J8
• With the phet simulation https://phet.colorado.edu/sims/html/energy-forms-and-changes/latest/energy-forms-and-changes_de.html one can visualize the transformations, but comes only limited close to the real interrelations.
• In many collections you can also find this experiment, as a model for voltage. However, it can also be used to show that a larger height difference leads to a faster turning of the water wheel and thus height energy is really converted into kinetic energy here.