Under this heading you will find some experimental pages with calculators. These may help you with various subjects, hopefully sizing of windmills, solar installations etcetera.

The calculators are based on publications that are also available through the WOT website or other means. But not everybody is a programmer and has Matlab or similar available.

For calculators and simulation programs relating to electric circuits and signal processing we direct you to http://www.meettechniek.info.

Two tools developed by umny.ca that can be useful when making geothermal heat exchangers:
Ground temperature: https://groundtemperatures.com/
Ground conductivity: https://soilconductivity.com/
*these tools are made and maintained by a third party, be advised that only the first few readings (each month) are free.