Harnessing Wind Energy :: physics power energy green environment clean

Living in Rural Alaska is very expensive because of its discriminate location. It would be even more expensive if aught, mail service, and other serve were not subsidized by the state of Alaska. In the late seventies and early eighties, the state of Alaska looked for ways to cut the high cost of subsidizing diesel engine fuel for generating electrical power to rural Alaska. It was during this time that wind energy was taken into consideration as a source of electrical power.The earlier known uses of wind power date fundament to 3000 BC, when people apply wind to sail ships. Approximately 4000 years later, windmills were employ in atomic number 63 to grind tobacco, wheat, and other grains. Later, in the 1700s, windmills were then used to pump water. It was not until the 1900s that wind mills were used for generating electric power. In the United States, windmills were used prior to widespead electrical distribution.The generation of wind can be traced back to solar energy. It i s ultimately a renewable and clean energy source. This is what makes it glossy to many as a source of energy for power plants. wrestle is created as a result of pressure differences in the atmosphere which is caused by temperature differences of radiating solar energy. Other factors that contribute to the flow of air (wind) is the rotation of the earth, and its terrain. We could expect more wind over bodies of water since water provides little resistance to wind than do objects on the come forth of the earth.If wind is essentially free, why dont we see more windmills? The reason is that wind doesnt blow whenever we pauperism power. Wind energy can only be stored in batteries and more than of the energy from wind can not be harnessed into helpful energy. The public also views wind generators as an eyesore on the landscape.Wind, initially is in the form of kinetic energy, hence it has the equation 1/2mv2, where m is the mass, and v is velocity of the air. Using the fact that the mass is equal to the volume multiplication the density, we can rewrite the equation for kinetic energy ask.e. = 1/2Vpv2, where V is the volume, and p is the density of air.Furthermore, the volume through a surface is equal to the area of the surface times the velocity of the air, times the time, thus the equation becomesk.e. = 1/2pv3At, where A is the area of the surface and t is the time.