In this article, we shall discuss how the transformation of energy from electrical energy to wind energy takes place.
Electrical energy supplies the power to generate wind energy. The electrical energy is converted to mechanical energy that produces wind energy due to the abrasion of air on the object.
How are Electrical Energy and Wind energy related?
To produce wind energy there is a need of perturbing the state of the rest of the air molecules.
The electrical energy is used to produce the wind energy and the wind energy can generate electrical energy and both produces the mechanical energy as well.
How is Electrical energy converted to Wind energy?
The electrical energy can be easily converted to wind energy using a motor.
The motor set up circular rotational motion with mechanical energy that produces the wind energy and the power of the wind depends upon the number of rotations of the blade.
Electrical energy is used to produce mechanical activities or to run the propellers. The rotational motion of the propellers produces wind energy.
When Electrical Energy is converted to Wind energy?
The electrical energy is converted to wind energy only in presence of the mechanical energy.
The mechanical energy is very essential for the conversion to take place. The propellers set the air into motion by running through the volume of the air giving it kinetic energy to accelerate.
Where is Electrical Energy converted to Wind energy?
The conversion process basically happens in the air volume itself.
The electrical energy is converted into mechanical energy, which supplies kinetic energy to the air molecules to produce wind energy. A part of the energy is lost in the form of heat and sound.
Electrical Energy to Wind Energy Formula
The electrical energy is given by the formula E=qV where q is a total charge consumed and v is a potential difference.
We know that the current is measured in terms of change in the charge per unit time and is given as
Where I is current, t is time and q is a charge
Now, the electric energy in terms of current becomes,
The wind energy is given by the formula as
Where P is wind energy,
A is a cross-sectional area
V is the velocity of air in a cubic volume
p is a density of air
The electrical energy changes to wind energy and a part of the energy are lost then
This heat energy is equal to Q=mcpΔT[/latex]
But the amount of heat produced is very less so we can neglect it here.
Hence, the velocity of the air for electrical energy generated can be calculated using the formula
The velocity of the air is a cubic root of
Electrical Energy to Wind Energy Efficiency
The efficiency of the electrical energy to wind energy is defined as the total wind energy produced by using the total electrical energy supplied to the device.
Here we are interest in the efficiency between the electrical energy to wind energy produced, that is,
Hence we can calculate the efficiency of electrical energy to wind energy using the above formula.
Electrical Energy to Wind Energy Examples
Here is a list of examples of electrical energy to wind energy:-
An easy example of electrical energy converted to wind energy is ceiling fans.
On application of the electric current, the electric power accelerates the fan into rotational motion providing the wind.
The electric motor used in a table fan starts rotating and along with it the propellers of the fan accelerate due to which the wind energy is produced throwing the air with the kinetic energy.
These fans are used to remove the gas full of carbon dioxide from the room and help in ventilation. This also works on the electrical energy converting it to wind energy.
The cooler drives the cold air in the room and is hence beneficial during summers. It mainly works on the compression of the water molecules evaporated from the volume of the water, cooling and then releasing the cool air in the room.
Here also the liquid oxygen is produced by compressing the oxygen filtered from the outside air, cooling down the liquid oxygen, and then expanding the liquid to gaseous form and releasing cool air into the surrounding.
Electric Vehicle in Motion
When the electric vehicles are in motion, the wind energy is produced due to the abrasion of the wind on the surface of the vehicle.
The windmill converts the wind energy into electrical energy and these rotations and intensified by using a motor on the shaft. This increases the power generated from the windmill.
The rotating turbine on electrical energy produces wind power by converting the mechanical energy generated.
The blades of the mixture start rotating upon turning on the electric supply. This rotational motion gives wind and vibrational energy too. This wind energy is produced from the machine of the mixture too due to the rotating motor.
The motors of the drone rotate due to the power supply. The trust applied on the ground to lift the drone upward is due to the wind energy that is produced by the rotating propellers of a drone.
The central processing unit of the computer has a small fan that drains out the heat produced by running the computer for a long.
It has an electric fan that rotates and blows out the hot wind.
It has an electric motor that runs the fan and forces the air in the direction of the exhaust port and collects the dust from the air gushing in.
Frequently Asked Questions
What is the wind energy in the area of 60 sq.m if the wind speed is 3m/s and the density of the air is 1.165 kg/m3?
Given: A =60sq.m
Using the equation for the wind energy, we have,
The wind energy in this locality is 314.55 J.
What is the efficiency of the electrical energy of 95 Joules producing the wind energy with the air running at a speed of 3m/s in a square shape room of 15m?
Given: length of the room l=15m
Density of the air is p=1.165kg/m3
Area of the room is
Hence, the efficiency is
The efficiency of the electrical energy to wind energy is found to be 37.24%.