Off Grid for Single Household Usage: Attic Wind Turbine Electricity Generation
Abstract- This research paper presents a small attic wind turbine system consists of 120 Volt Direct Current, 2500 rpm, 60 Watts generator which is attached to the rooftop ventilator wind turbine. When the ventilator turbine rotates at a low current wind speed, the generator produces DC voltage high enough to charge to the 12 Volt, 125 Ampere hour batteries bank for household appliances or lighting usage. The prototype generator testing is carried out in electrical machines laboratory at CSULB to determine the characteristics of the output voltage with the artificial wind speed produce by the electric fan. Based on the results, the energy output voltage can …show more content…
[1] Figure 3: Kinetic energy of wind.
Actually, the power potential of the wind is its kinetic energy, which is v^2/2 per unit mass, and m ̇ v^2/2 for a given mass flow rate: e_mechanical=ke= v^2/2=〖((10m)⁄s)〗^2/2 ((1kJ⁄kg)/((1000m^2)⁄s^2 ))=0.050kJ⁄kg m ̇= ρvA= ρv (πD^2)/4= ρvπr^2
P=W ̇=E ̇_mechanical= m ̇e_mechanical= 1/2 ρv^3 πr^2 Figure 4: The power curve for a wind speed
The power generation of a wind turbine is proportional to the cube of the wind velocity V^3 and thus the power generation will change greatly according to the wind speed and the Earth’s terrain condition. Therefore the maximum energy conversion can be calculated as the following formula:
E_max= W ̇_max ∆t=0.2144kW×8760h⁄yr=634kWh⁄yr (per m^2 flow area)
In addition, the area of the blades (air-swept area) plays an important role in capturing the wind energy. The longer the blade, the bigger the rotor area of the wind turbine, as a result, more wind kinetic energy can be captured under the same conditions. However, we can achieve the quality with smaller diameter by increasing the number of the blade to compensate the area lost …show more content…
According to the theoretical calculation and testing on the prototype in the electrical machinery laboratory at CSULB using artificial wind speed generated by an electrical fan, the attic wind turbine can deliver about 20 kilowatt-hours of electricity annually, which is enough to charge the 125 Ampere hour batteries bank.
The attic wind turbine is designed specifically for upgrading the existing attic ventilation turbines in the vicinity of the buildings and the people, meaning that it is quiet, and low cost comparing to the solar panel. Also, it is an eco-friendly. At about 20 feet on the rooftop and 20 inches in diameter, rounded shape also helps form an artistic point of view. Also, no one will ever notice that it is used for an electric generation. As for durability, anything at 6 mph or roughly about (2.66 m)⁄s and more, the attic wind turbine will get the current flowing to charge the batteries bank.
Abstract- This research paper presents a small attic wind turbine system consists of 120 Volt Direct Current, 2500 rpm, 60 Watts generator which is attached to the rooftop ventilator wind turbine. When the ventilator turbine rotates at a low current wind speed, the generator produces DC voltage high enough to charge to the 12 Volt, 125 Ampere hour batteries bank for household appliances or lighting usage. The prototype generator testing is carried out in electrical machines laboratory at CSULB to determine the characteristics of the output voltage with the artificial wind speed produce by the electric fan. Based on the results, the energy output voltage can …show more content…
[1] Figure 3: Kinetic energy of wind.
Actually, the power potential of the wind is its kinetic energy, which is v^2/2 per unit mass, and m ̇ v^2/2 for a given mass flow rate: e_mechanical=ke= v^2/2=〖((10m)⁄s)〗^2/2 ((1kJ⁄kg)/((1000m^2)⁄s^2 ))=0.050kJ⁄kg m ̇= ρvA= ρv (πD^2)/4= ρvπr^2
P=W ̇=E ̇_mechanical= m ̇e_mechanical= 1/2 ρv^3 πr^2 Figure 4: The power curve for a wind speed
The power generation of a wind turbine is proportional to the cube of the wind velocity V^3 and thus the power generation will change greatly according to the wind speed and the Earth’s terrain condition. Therefore the maximum energy conversion can be calculated as the following formula:
E_max= W ̇_max ∆t=0.2144kW×8760h⁄yr=634kWh⁄yr (per m^2 flow area)
In addition, the area of the blades (air-swept area) plays an important role in capturing the wind energy. The longer the blade, the bigger the rotor area of the wind turbine, as a result, more wind kinetic energy can be captured under the same conditions. However, we can achieve the quality with smaller diameter by increasing the number of the blade to compensate the area lost …show more content…
According to the theoretical calculation and testing on the prototype in the electrical machinery laboratory at CSULB using artificial wind speed generated by an electrical fan, the attic wind turbine can deliver about 20 kilowatt-hours of electricity annually, which is enough to charge the 125 Ampere hour batteries bank.
The attic wind turbine is designed specifically for upgrading the existing attic ventilation turbines in the vicinity of the buildings and the people, meaning that it is quiet, and low cost comparing to the solar panel. Also, it is an eco-friendly. At about 20 feet on the rooftop and 20 inches in diameter, rounded shape also helps form an artistic point of view. Also, no one will ever notice that it is used for an electric generation. As for durability, anything at 6 mph or roughly about (2.66 m)⁄s and more, the attic wind turbine will get the current flowing to charge the batteries bank.