Wind Energy: Solar Energy

Solar Energy Robert Ehrlich (2007) states that the solar energy is the main dominant source, and other energy sources such as wind and hydro power are types of converting sources of the solar energy. Since the sun is the closest star the earth, the most received radiations from other stars to the earth come from sun radiations. According to the experts, the cleanest and most plentiful source for energy is the solar power, which is also renewable in the same time and continuously available. Modern technology plays a strong rule to reshape this energy to consume it. The consumption covers many aspects such as generating electricity, providing light and heating water for domestic, commercial, or industrial use. Many techniques are used

It is used and converted generally by a common tool which is called wind turbine. A wind turbine is a device that converts kinetic energy from the wind into electrical power. A significant issue is raised with wind energy. This issue about the ability of producing power from the wind and alternatively consuming it. The fact is that the wind turbines are not usable in many situations, so this tool is not effective many times, because it depends on the speed of the wind. It shows a common differences between the solar energy and wind energy. Solar energy is producible wherever you have sun radiations but wind energy is not producible every time. The wind energy producer tools (wind turbines) have many options to operate, the operation can be a rotating either a horizontal or a vertical axis. Horizontal-axis wind turbines (HAWT) is used commercially to generate electric power. Vertical-axis wind turbines (VAWTs) have one advantage, which is that this type does not depend on the direction of the wind. Therefor it is used where the wind direction is variable.

Run-of-the-River (ROR)

Big companies are managing this task their selection of the places are more efficient. The efficiency reaches to the 90% in some cases. As a result for this fact, many times a small project could generate a huge amount of electric power if the selection point is well planned.

Geothermal Energy According to the Eric Jeffes (2012) “geothermal resource is a reservoir inside the earth from which heats can be extracted economically and utilized for generating electrical power” (P. 49). What does it mean? How can this be explained? In the coming paragraph this issue will be illustrated. In every point in this earth, the shallow ground or upper 10 feet of the Earth's surface has regularly an exact known temperature, which is in many cases between 50° and 60°F. To get the benefits from this heat, there is a common tool which is called Geothermal Heat Pumps. A geothermal heat pump system consists a heat pump, an air delivery system, and a heat exchanger system of pipes buried in the shallow ground near the building. In the winter session, the heat pump eliminates heat from the heat exchanger, and pumps it into the indoor air delivery system. The opposite process is applied in the summer season, which means that the heat pump moves heat from the indoor air into the heat