This explains the re-emergence of wind power as a green and sustainable source of energy. The argument behind the re-emergence of wind powers source of energy cannot only be looked at in the context of milling rain or pumping of water as was the case in the past, but is all about the energy needs that have grown due to globalization and industrialization (Schmid and Klein 1990, p.17). Wind power is generally harnessed from wind in motion, which is transformed into energy with the help of a wind turbine. Blaabjerg and Chen (2006 p.1) note that wind turbine has been one of the fastest growing renewable energy technologies. Its development began in the 1980s with just some tens of kilowatts in terms of power rating to the current megawatts. Blaabjerg and Chen argue that in the past, production of wind power did not have a lot of impact in the system of power operation and control, but today it contributes a lot in energy supply since the level of power penetration is on the rapid increase (Paraschivoiu 2002 p.45). In the beginning, the technology used in wind turbine was generally the squirrel-cage induction generators, which were directly being connected to the grid. During this time, there were no active controls of active power reactors. The parameters used for control has become necessary due to the increase in the power range for the wind turbines. Blaabjerg and Chen note that the introduction of power electronics has led to a change in the basic characteristics of the wind turbine from a source of energy to an active source of power. In recent times, many nations are making a rash toward the use of gold in the manufacture of the wind turbines. This paper will discuss the main parts that make up a wind turbine and their functions. The paper will also discuss the choice of materials that are used in the manufacture of the major parts and where gold as a raw material is used under the current design and where it can be used. Main Parts Of A Wind Turbine And Their Functions Ancona and Mc Veigh (2001 p.1) note that wind turbines usually come in a varying sizes and configurations, built from different materials. The wind turbine consists of four main parts; the rotor which has wing-shaped blades connected to a hub; a nacelle which holds a drivetrain consisting of a gearbox, support bearing, connecting shaft, the generator and the machinery; a tower; and the electrical equipment mounted on the ground Ancona and Mc Veigh (2001 p.3). Turbine Rotor Blade The turbine rotor is the part that coverts the alternating wind energy into a mechanical energy, which is then converted into electrical energy via a generator, which is then moved to the grid with the help of a transformer and lines of transmission. Within the wind turbine there exists a blade aerodynamically designed that captures the wind power and converts it to rotating mechanical energy. Blaabjerg and Chen (2006 p.3) note that the number of blades that make the rotor may vary. The speed of rotation usually decreases with an increase in the radius of the blades. For instance, for a wind turbine of megawatt range, the speed of rotation ranges between 10-15 rpm. The blades exist in different sizes from about 34 to 55 meters. The rotor blades are made of materials such as carbon fiber, balsa wood, and fiberglass with high tensile ratio. The materials are usually modeled to form airfoils that
How to Use Gold in Wind Turbines Introduction Hau (2006, p.1) argues that the use of energy from wind is not a phenomenon. Instead, it is a rediscovery of past traditions of wind power technology. Hau reveals that it is no longer easy to point out the historical aftermath of how wind power has played a vital role in the past…
In this paper, the case of Daniel, who is a nine years old patient of ASD, will be discussed. The paper entails the option of using media to help him express himself in regards of his disease. Moreover, the special educational intervention techniques are discussed and certain important questions related to the topic are answered.
There are two situations in this case that touches on ethics. The first being blowing of whistles and the second being ethical issues, which are inclusive of trust and honesty between the firm, and its environs. A major problem that has been stated in this case study is about fairness.
This means that a hard disk is the primary device where all data and programs are stored and retrieved (Warwick, 2010). It utilizes the magnetic recording technology whereby data is recorded by the magnetization of a very thin film made of a ferromagnetic material.
The products and the services delivered by the company comprise wireless communication, broadband and internet services, telecommunication tools, directory advertising and managed networking. The four major services that the company strictly focuses on include business, broadband, consumer and wireless services (Reuters, 2012).
The focus group technique will be used to research the GCIT brand’s effectiveness with regards to different segments of the target market. A small number of individuals can be brought together to talk about the topic. A moderator is used to co-ordinate the discussion and the persons selected for the focus group have to be of a shared background and possess similar experiences in their education preferences (Krueger & Casey, 2010).
It is for this reason that environment in which humans live should be conserved and protected against these destructive human activities (Mathew & Philip 2011). One way of protecting and conserving environment is through adopting sustainable activities (sustainable ways of doing things).
Today, almost everybody owns a mobile phone, including children, too). These devices are today considered amongst the most important aspects of people’s lives; mobiles phones are so important to people that most individuals feel uncomfortable when they do not own them (Chan 2007).
Further, this mechanical power harnessed from the wind through the use of turbines can also be converted into electricity using a generator. Though comparable to a fan, a wind turbine generates electricity using wind unlike a fan that needs electricity to generate air currents otherwise called wind.
As a managing director I have had to come across many situations where I experienced a leadership crisis or a decision vacuum .It is at these points sometimes I saw some laudable efforts taking place and at other times I saw ethically disappointing decisions.
enomes found in the somatic cells is twice as much as that contained in the egg and sperm cells (haploid human genomes) which have close to 3 billion pairs of DNA base (Mockey 2004). Human beings exhibit differences in genomes ranging from one individual to the other
6 pages (1500 words)Case Study
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