Humidity is in the air. When we know humid relativity and air temperature we can know the mass of water in the air per volume.
Water Molecule Per mass of volume
After we know water mass per volume, we can calculate how many molecules of water are in the air from
(mass of water/18) x 6.022 × 10²³
Keep the answer for later use.
Total Charge water molecules can have
We know that each water molecule can give 1 electron so all water molecule from answer above must give (mass of water/18) x 6.022 × 10²³ electron to external circuit.
Electron Charge and coulomb
We know each electron has 1.60217663 × 10-19 coulombs then all water molecule can have
(mass of water/18) x 6.022 × 10²³ x 1.60217663 × 10-19 Colomb
Area of enarator and Wind Velocity how much current can be
If we know the area of generator and wind velocity of the place of the generator. We can calculate the culomb per second which is current of the circuit
Because the wind velocity will circulate the water mass to the generator, then we have.
(mass of water/18) x 6.022 × 10²³ x 1.60217663 × 10-19 Colomb x Area that face water molecules x wind velocity
Total Power Density
Finally we get the power density when we measure the volage of the generator which is different from generator to generator.
Total Power Density =
(mass of water/18) x 6.022 × 10²³ x 1.60217663 × 10-19 Colomb x Area that face water molecules x Wind Velocity x Voltage
Practical Power Density
However each generator can not turn water molecules to electron, some molecule may slip from generator layer and does not give out electron.
We need to optimize each generator to maximize electron generation so we get close to this power density potential calculation.