Air inlet. It is best to place the interceptor fan at the air inlet, because in order to ensure the air intake volume, it is best to place it at the air inlet. The fan is a machine that relies on input mechanical energy to increase the gas pressure and discharge the gas. It is a driven fluid machine. Fan is the customary abbreviation for gas compression and gas transportation machinery in China. Fans commonly include ventilators, blowers, and wind turbines.
First use the continuity square principle: v*s=fixed value. In this way, the speed of the air outlet can be calculated v2=v1/4.
Let’s calculate how much electricity is generated per unit time, that is, how much kinetic energy is converted into electrical energy per unit time.
Assume that after a period of time t, the mass of the wind entering the generator is m=ρ*v1t*s1, and the total kinetic energy of the wind:
Ek=1/2*m*v1 ^2=1/2*ρ*v1^3*t*s1,
During this period of time, the total kinetic energy of the gas leaving the generator is Ek'=1/2*ρ*(v1/ 4)^3*t*4s1
So the energy provided to the generator is w=Ek-Ek'=1/2*ρ*v1^3*t*s1*15/16.
The electric power is: p=w/t=15/32*ρ*v1^3*s1