Of what value are the four key concepts of Organization & Identity Essay

Of what value are the four key concepts of Organization & Identity (Identity, power, inequality, insecuirty) for understanding p - Essay Example These theories attempt to provide a justification for the theorisation of organisations and businesses as we have today. They provide a basis for describing and analysing the structures and foundations of organisations in the world and how humanity evolved from an unstructured world to a system whereby the concept of work takes the centre-stage and organisations are at the forefront of societies. This paper examines four important concepts related to organisations: identity, power, inequality and insecurity. The paper would answer the research question: what is the value of the four concepts of organisation and identity provides for the conceptualisation and understanding of management practices and systems in organisations. In attaining this end, the following objectives would be examined: 1. An assessment of organisational behaviour and conceptualisation of organisations. 2. An examination of the concept of organisational identity and internal structures. 3. An evaluation of the po sition of power and inequality in organisations. 4. The conceptualisation of the distribution of power, insecurity and corporate justice. Portions of this paper would involve the writer's personal experiences as an importer. The writer has been involved in the importation of products from China into the UK. The writer makes his profits from the cost variations and differences in prices between China and the UK. This profit provides him with a source of livelihood and the potential of recreating this income generation opportunity in the form of an organisation is examined at various points in the essay. Organisational Behaviour & Conceptualisation of Organisations Knights and Morgen (1993) argue that consumptions marks the modern society. This is because in the world today, there is the free economy where people work and the are free to do whatever they want. Things are fixed by the concepts of demand and supply. Hence, there is the need for people to come together to define the syst em through which they can work and provide the best results and optimise resources. Consumerism is in vogue because people are not restricted and governments do not continue to wield the control that they had before the Second World War (Knights and Morgen, 1993). In most nations around the world, there is the freedom to run commercial entities and get things to happen. This has led to a trend where organisations run the affairs of individuals and groups in different parts of the world. Consumption tends to influence the way people come together to do things. Consumption is crucial in the world today and demand and supply define how things must be done and how resources should be allocated. This laissez-faire system has encouraged the creation of groupings for effective work and the attainment of results. Consumption trends provide the roadmap for people to put factors of production together to attain results. This has provided the impetus for the creation of businesses and organisa tions in different parts of the world. The the trends in consumerism has provided the impetus for corporate entities to come together and grow as they pursue their economic ends through the provision of goods and services for consumers to use to satisfy their needs and aspirations. Drawing into my personal experience, I can identify that the importation industry revolves greatly around consumerism. In my sector of operations, most companies involved in the industry provide goods and services

Gender Roles in advertising Research Paper Example | Topics and Well Written Essays - 1500 words

Gender Roles in advertising - Research Paper Example In other words, the cultural breakdown is a symbolism of media that currently lacks restraint in its promotion of important goals and objectives that are helpful to humanity (Adorno & Horkheimer 57). It, therefore, proves hard to find the close relationship between the essence of feminism to encourage the girl-child and making targets for increased profits. Despite the negative events that presently dominate the media in distorting and redefining gender norms to favor corporate firms, a new wave of internet activism tries to debunk these notions to bring ethics and responsibility in information dissemination. Advertising and gender roles have a close relationship in promoting the sale of goods and services while using a vibrant media. This has been attained through the consistent reinforcement of gender norms. It begins by examining the role of gender norms in business especially with the proliferation of various media such as TV, internet and radio among others. It, therefore, allow s the culture industry to thrive based on significant enlightenment because it explores morals and values found within a capitalist economy (Carroll 145). However, while Adorno and Horkheimer condemn the culture industry that has denied society the visibility of gender roles in terms of denying men and women freedom and responsibility, other pertinent factors still emerge. For example, media sources through advertising depict women as beautiful to affirm the notion that sexiness sells particularly when used in billboards, television and the internet. Additionally, the representation of bodies of both men and women evokes sexuality as an interesting game vital in generating more viewers that often translates to increased sales. The trend is escalated by a cyber democracy that blossoms on exaggerated freedoms that include politics attached to personal liberation and warped online ideologies. According to Stuart, the media sources reveal ambiguous meanings and messages that communicate a larger picture when describing the gender norms in the 21st century (Hall 54). America leads in this endeavor by reconstructing scandals and politics around advertisements with the use of political figures such as Sarah Palin and Hilary Clinton. Other prominent personalities who have featured in this race of reconstructing gender norms entail Barack Obama and Bill Clinton. The idea of gender norms is also evident in advertising through the assessment of complex structures that are echoed in different media forums. This is supported by a media syste m that focuses on the maximization of production through the increase of ads that are sexually stimulating and with mixed innuendos. Such orientation was notable when Kennedy’s handsomeness was given much spotlight in his presidential debate with Nixon in the 60s. The media hype was also observed in Sarah Palin’s offer for a porn movie at $1 million and as an advertising strategy of promoting the Republican’s political fortunes and thus furthering the issue of gender norms. It means the media contributes largely to the representation of heterosexuality as a channel of garnering viewership and sales while also grabbing political attention to sway undecided voters. Sexualization in gender norms also remains the dominant theme in TV advertisements and is therefore, increasing

Media production Essay Example | Topics and Well Written Essays - 2500 words

Media production - Essay Example The settings of this film can be illustrated through the luxury portrayed by the Italian director Luca Guadagnino through choice of settings, thereby making the movies a form of European art film. For instance, the film utilizes lavish costumes, sets, elaborate pacing, and nuanced mise-en-scene; in fact, this form of visual poetry and opulent imagery is not common in European movies. The film is set during Christmas through an aperture sequence to reveal Milan during the winter. Furthermore, the film is made in spectacular mansion of the affluent Recchi family, thereby developing a scene, which evokes Visconti’s â€Å"The Leopard.† For example, this mise-sn-scene is portrayed during a gathering by the family for a birthday dinner in honour of patriarch Edoardo Recchi (Swinton), who is a stylish and reserved head of the family. Another scene through which elegance, luxury and beauty is portrayed in the film is when, a young man names Antonio joins the family at the house to deliver a cake to Edo and he is introduced to Emma. At this point, the Luca Guadagnino's I Am Love offers complete digression into the privileged world attributed to impossible of luxury and sophistication, which numerous Hollywood’s Golden Age film tries to achieve (Noh, 2010, 1). On the other hand, Yorick Le Saux’s photography skills presented magnificent designs of these scenes by focusing in the aspect of timelessly archetypal attires by Fendi. For instance, Swinton appearance portrayed Raf Simons to be a fashion genius in making his film debut. A new scene in this film is developed through a rigorous editing in order to establish a context of natural environ. In this case, there are master shots created through progression of speedy cuts of shots in order to offer a representation of the entire scene. Apparently, this new scene is strident in terms of its presentation; though there is difficulty in understanding the way these new surroundings are introduced. B esides, the movies do not present the transition from one scene to another in interesting ways to viewers’ consciousness. Instead, presentation of new scenes is focused on reforming viewers’ understanding of the new scene to fit into the narrative. The film presents another mise-sn-scene in a restaurant where Emma is dinning with her mother-in-law and prospect daughter-in-law. Apparently, Emma is stirred up by the prawn prepared by Antonio; in fact, this is a scene that depicts a transition from 2D to 3D and smell-o-vision. On the other hand, performance by Swinton in this mise-en-scene precisely depicts Emma's arousal by the food. In fact, this forms a brilliant scene in the film while viewers watch as Emma lose control of her senses while her inhibitors take control of her for the rest of the movie. In addition, the movie has a temperate pace, through it gas speedy cutting for sense alteration, and so does the Recchi family. Nonetheless, there are few things that occ ur in the film, though they are enough to make it captivating. Therefore, mise-en-scene of the film is attributable to powerful visual cues, which narrates the story and catalyze the narrative’s transition from plot to plot. Camera Work Camera works make the film splendid, whereby Guadagnino uses different angles by positioning the camera in unusual spots. In fact, this makes the film has few

Analyze and explain the development of healthy relationships Essay

Analyze and explain the development of healthy relationships - Essay Example In this mini-paper, the following ingredients necessary for the development of healthy relationships will be elaborated on: (a) Love; (b) Good Communication; (c) Patience; (d) Trust; and (e) Loyalty. Rohn (2010) asserts that love is the basic requirement for a healthy relationship. It is more than just a feeling. It is a commitment to people around us and who mean to us that we will respect them and treat them justly at all costs. A relationship cannot be a fulfilling one if we compromise upon respect and dignity. Respect and be respected; love and be loved; and, this will ensure a satisfying relationship. Good communication waters the plant of a healthy relationship. It requires particular skills to have one’s ideas conveyed to the other person and to listen to his ideas patiently. One should try to let the other person know explicitly what one wants without having him solve the puzzle. Keeping others thinking what the actual problem is will do no good. While communicating, one must be humble and compromising instead of trying to control the other person’s thoughts and should be able to give space to his ideas too. Patience is another vital ingredient for a healthy relationship. We must understand that there will be times when our relations will disappoint us and vice versa, and that no person in this world is perfect. We also disappoint others and should expect others to fail us. It is patience that maintains a relationship through turmoil. Showing patience to others’ disagreements shows that we value them and respect their opinion, and this is natural for people to stay relaxed with people who tolerantly listen to them and try to understand the problem patiently. This fosters healthy relationships. When we trust the other person, this means that we are giving him enough space so that he can pursue his own interests, can make relationships and can do everything he wants without getting ourselves insecure and jealous. When we tell

People Who Need People Essay Example | Topics and Well Written Essays - 500 words

People Who Need People - Essay Example A comprehensive social contract theory would depend upon the ideas of Stuart Mill, Thomas Locke, and John Rawis. John Stuart Mill’s ideas would be helpful in developing a perfect relationship between the individual and the state. The state, as an entity of authority, should work towards satisfying the individual’s interests. The state, therefore, should ensure that the individual attains the maximum satisfaction possible while also minimizing pain an individual faces. For instance, in terms of food, the state should ensure that a citizen becomes satiated. Similarly, the state should minimize hunger in the individual. The state, however, only performs these duties as long as the satisfaction of an individual does not compromise on the welfare of other individuals. Besides, the state should define a society form the individual’s disposition rather from the communal view (Jeske and Fumerton 163). The state should create an environment that enables the individual conform to oneself rather than conform to the society. Thomas Hobbes’ ideas are crucial in determining the finite capacity of the state in governing individuals’ affairs. Hobbes defines human beings, in their natural state, as unruly and asocial beings whose interests are rarely unified. This imposes the necessity of the state in harmonizing the interests of individuals. The state, therefore, is a natural consequence of individuals’ disorganized nature. Eventually, states behave as human beings as they develop asocial nature. In this perspective, the state should be subject to regulations that ensure it operates within responsible confines. Individuals should not hold the state as an entity that cannot err. This is because the state reflects the magnitude of disorganization present in a society. It is essential for individuals to create structures that ensure unrelenting transformation of the state towards perfection. John Rawls’ theory is essential in rationalizing the John

Health Risk Assessment Bnts Story Essay Example for Free

Health Risk Assessment Bnts Story Essay To die with dignity should be a given. Death will present itself to everyone eventually and presumably no one in their right mind would choose not to die with dignity. That being said why is it that so many people who would choose to die a good death are no allowed to. For some people no death is a good death, but that is silly because as everyone knows death is inevitable. No one can escape this fact. The controversy herein lies within the circumstances people who are suffering or lingering with a terminal illness that debilitates them such that they have no quality of life are not afforded the comfort of dying with dignity. It seems that this high merit is available to our beloved pets, but not our beloved family members. Aunt Bessie is forced to endure unrelenting pain from here incurable pancreatic cancer. No amount of pain medication is available to treat her pain and allow her to maintain consciousness. She knows her time is limited and she does not feel she should have to wait out the inevitable in such a terrible state. At the same time the family pet Bassett hound is found to have a mass in her intestines. She cannot eat and barely moves as she is in so much pain. The veterinarian has given the option of putting her to sleep or euthanizing her to put her out of her misery as she is suffering so. This sits well with most people. Aunt Bessie requesting euthanization though is out of the question. Why is the question that this paper will attempt to answer and why this is wrong will also be addressed? Euthanasia Defined Euthanasia can bring about different feelings to people depending on the context in which it is used. Mention that good old dog and it is good as they no longer suffering. Change the identity to a person and it is not so easily swallowed. No matter how it is interpreted the true meaning of the act is the same in either circumstance. â€Å"Originating from the Greek terms eu (happy or good) and thanatos (death), euthanasia means literally happy death or good death. (Le Baron Jr. , 1999). Breaking that definition down even further is subdivisions in the definition are voluntary/involuntary and active/passive: â€Å"Voluntary euthanasia is a death performed by another with the consent of the person being killed. Non-voluntary euthanasia is the provision of euthanasia to an incompetent person according to a surrogates decision. Involuntary euthanasia is euthanasia performed without a competent persons consent. Passive euthanasia involves allowing a patient to die by removing her from artificial life support systems such as respirators and feeding tubes or simply discontinuing medical treatments necessary to sustain life. Active euthanasia, by contrast, involves positive steps to end the life of a patient, typically by lethal injection† [ (Le Baron Jr. 1999) ] Euthanasia brings tranquility to death. In euthanasia the suffering prior to death is limited and death is entered more peacefully as opposed to lingering with pain and suffering. Presumably most people would want to end their journey in life without pain and suffering. A more compassionate death is a more desirable death. However to know what euthanasia actually means requires more exploration into the depth of this term. Practical Problems Euthanasia can bring about bad feeling to some people. After all when the term is used it is in relationship to death. In our culture and to numerous people death or speaking about death is taboo. This is an unfortunate fact. What is most unfortunate is that death is inevitable and therefore discussion regarding it should be more open. Essentially the problem with euthanasia is this taboo associated with it. Ethically euthanasia is an appropriate and well warranted act of kindness and consideration. Support of euthanasia will be provided within the context of this paper, and the potential negative issues will also be brought up. Ethics Argument For The ethical principles that can justify euthanasia are many. This is because the premise of euthanasia is based upon the idea of caring. This idea of caring is inherent to most care givers and is the key principle in euthanasia. Such acts of caring resonates through theses ethical principles and frameworks: Respect of persons, Virtue ethics, Utilitarian, Rights based ethics and ethics of caring. These frameworks or principles although many will all show supportive qualities for euthanasia. Respect of Persons In respect of persons the support of euthanasia is found in that the principle here is that individuals are afforded autonomy and able to make their own decisions. When a person chooses not to suffer at the end of their life this is an autonomous decision. â€Å"Respect for persons generally means respecting a client’s autonomy† (Ethical Principles, 2011). That person in the eyes of this principle is just in making that call. The respect of person principle sustains this in its foundation. â€Å"The principle of respect for persons affirms the primary importance of allowing individuals to exercise their moral right of self determination. To violate their ability to be self-determining is to treat them as less than persons. (Bennette-Woods, 2001). Therefore, this principle is then supportive of euthanasia when decided upon by an individual. Virtue Ethics With the act of euthanasia people are seeking the good by allowing a good death. Suffering is not permitted to go on until death. Rather death is allowed to happen prior to a lengthy battle with pain and suffering. Virtue ethics is doing good and for the right reason. Forcing peop le to live with pain and suffering would not be characterized as good. So presumably then allowing for euthanization is good. Because it is done in response to alleviate further pain or suffering it satisfies the right reason aspect. In another view the dying patient is taking a virtuous stance. â€Å"Some dying patients consider it virtuous to spare friends and family the ordeal of witnessing a slow process of degeneration† (van Zyl, 2002, p. 19). This again satisfies the criteria for virtue ethics. Utilitarian In encompassing the utilitarian ethical frame work consideration must be made for the balance of the greatest good. Allowing a person to die a â€Å"good death† will promote the greatest happiness for both the person and for those remaining behind. Sure there will be unhappiness in that there is a loss with the person dying, but the greatest happiness will be in knowing that the person is no longer suffering and that the pain of their disease is not torturing them any longer. This satisfies part of the balance. The other part is on behalf of the individual who is suffering. There is much good in ending a life from pain and suffering. A â€Å"good death† is much more desirable then a death of unrelenting pain and suffering. Therefore the balance of the greater good is established here and the utilitarian frame work is established. Right Based Ethics The right to die is an inevitable right. â€Å"Advocates of euthanasia argue that people have a right to make their own decisions regarding death, and that euthanasia is intended to alleviate pain and suffering†. (Nargus, 2012) It is of the belief of many that all people hold this one true right. Dying is ultimate natural right. â€Å"The patient has the right to make the decision about when and how they should die, based on the principles of autonomy and self-determination† (Nargus, 2012). This alone substantiates the use of rights based ethics and upholds this as an ethical point for euthanasia. Ethics of Caring This is the final ethical stance that will be used to persuade the positive perspective of euthanasia. To care is the essence of this ethical principle. To care would be to not allow suffering with pain at the end of life. Compassion is a must in the ethics of caring and allowing pain and suffering to continue cannot be construed as compassionate. â€Å"The ethic of care demands that we maintain conditions under which caring can flourish†. (Bennette-Woods, 2001) How better to show a sense of caring then by stopping suffering, stopping pain and allowing for a good death. Ethics of caring is the basis for most nursing philosophies and can be equated to most nursing principles. Care is not just in the physical sense, but the emotional sense as well. Care is delivered when euthanasia is allowed. Ethics Argument Against The arguments proposing that euthanasia be allowed were provided and supported. Now a few counterarguments will be analyzed and provided. Kant’s original ethical framework intent was clearly against the use of euthanasia, but a newer vision of Kantian ethics could also be supportive of the act. However, the argument against it in this framework will be what is focused on. Nonmaleficence framework can also be argued against euthanasia. This theory bases itself on doing no harm and depending what is perceived as harm is how this argument can be made. Kantian Ethics â€Å"A moral action is one that is performed solely for the purpose of meeting a moral obligation, and the action itself can only be judged moral in light of the intention behind it†. If the intention produces death it cannot be a good intention. Death although now relieved of suffering is the outcome. With Kantian ethics the end result is not at question. The person no longer suffering perspective is not of any value. The point is euthanizing a person is morally wrong and the outcome (alleviating pain and suffering) has no bearing in the matter. This is why this argument was not used in the pros. The outcome has to matter. Nonmaleficence Ethics â€Å"The principle of Nonmaleficence states that we should act in ways that do not inflict evil or cause harm to others. In particular, we should not cause avoidable or intentional harm. (Bennette-Woods, 2001) While some people feel that causing an earlier death as with euthanasia is harmful not everyone shares this view. â€Å"Professional organizations have invoked professional obligations as an argument against support and participation in assisted suicide and euthanasia†. [ (Ersek, 2004) ]. For those that do this could certainly be understood as argument against euthanasia. However, for others the harm is noted in the continuance of a life of suffering. Catholic Moral Tradition Each human life is considered sacred and deserving of a right to life. This is the position that the Catholic moral tradition stands behind. According to the Roman Catholic perspective, we are not obliged to ward off death at all costs, but we should not deliberately intervene to bring death about (Euthanasia a Catholic Perspective, 1987)†. The church goes on to say that† the end of human life is not subject to a persons free judgment† (Euthanasia a Catholic Perspective, 1987). This theory protests that as in birth; death can only be implemented by God. However, even the church has come to make exceptions or loop holes that allows for euthanasia to happen. In the double effect principle medication can be given in large doses to relieve pain. The patient will succumb to death as a result of this medication, and that is ok. As long as the intention is to relieve pain, not cause death the Catholic moral traditions is receptive to this. It seems as if the church has struggle d with this issue in the past and the best that they can deliver is this double effect doctrine. (This was actually developed in the 15th century). . Final Justification â€Å"A slow, painful, undignified death is a fate that most of us would not wish on our worst enemies† (Dyer, 1999) yet this fate are often offered to people, loved ones and family members. This categorically should not be. Euthanasia theories have been presented and supported both for and against the act. What it comes down to is how individuals understand things. Some religious factions are adamant that this act is strictly forbidden. This author does not share these views. There is no argument that it is wrong to kill someone. However, there has to be availabilities for exceptions. When an act is done for all the right reason it then becomes a just act. When a person is deemed terminal and is some way suffering then this would create such an â€Å"except†. This is only one of an infinite number of â€Å"except† possibilities. Each case presenting itself must be evaluated for its ethical morality. Evaluation can be accomplished by using the previous theories presented in favor of euthanasia. Should the case lend itself to these proposed theories then it is indeed a just act. Pets are not made to suffer a miserable final existence (associated with the love of them) neither should people. Loved ones, family, friend or foe no one deserves to die suffering when a good death is an option.

Power generation

Power generation Introduction The availability of electricity and its per capita consumption is often regarded as an index of national standard of living in the present day civilization. The amount of power generated is a sign of growing gross national products which reflects prosperity of the people. Energy goes in tandem with progress. The lack of it and inadequate measure can throttle the entire economic activity and well being of the country. Therefore, energy is considered as the most basic input for any country for keeping the wheels of its economy moving. Electricity is an easy form of energy which can be produced easily, transported easily, can be used easily and also controlled easily. Power plants are used to produce electricity in bulk quantities. However, in a developing country like India, the demand for power is increasing at a very rapid rate. As a result the use of renewable forms of energy is being increased and at the same time actions are being taken to improve the overall efficiency of the existing power plants. Combined cycle power plant couples a steam and a gas power plant in order to improve the overall efficiency to 70%. This combined cycle recovers much of the exhaust energy and uses it further to drive a steam or gas turbine or a district heating plant. As a result, there is an increase in the power produced and at the same time it reduces additional cost and the generating cost. There are many other benefits of a combined cycle power plants. Benefits like high efficiency and low environment impact are the most important. In todays world, emission levels of all kinds of fuels must meet stringent regulations acceptable to the countrys government. It is therefore important for power producers to invest in plants which have low emissions level. Risk mitigation and public acceptance are paramount. Combined cycle plants especially those which use natural gas or other renewable resources are a good choice for low emissions. Carbon dioxide emissions and other gases produced in a combined cycle power plant are much lower than other fossil fuel technologies. Power Generation System Simple Power Plant Cycle A simple power plant generation cycle utilizes only a single thermodynamic cycle at a time. It converts the energy stored in fossil fuels into shaft work and ultimately into electricity. It uses water which is generally in the liquid state and sometimes even in the vapor state, as the working medium. The energy which is released by the burning the fuel is used to heat water and convert it to steam which is then further used to run a turbine to generate electricity. The steam which leaves the turbine is sent to a condenser such that the water can be re used. However, the efficiency of a simple cycle is still less and large amount of exhaust is emitted at the end of the cycle. The efficiency of a simple power plant is given by: ÃŽ ®(cycle) =W(net)/Q(1)=W(T)-W(P)/Q(1)=Q(1)-Q(2)/Q(1) =1-Q (2)/Q (1) The major components of a simple power plant cycle are as follows: (i). Compressor (ii). Combustor (iii). Power turbine (iv). Generator In a simple power plant as seen, ambient air is filtered and then compressed to a pressure of 14 to 30 bar (190 to 420 psig). As the air is compressed its pressure increases which in turn are used to burn the fuel producing hot gases with a temperature generally higher than 1,000 degree Celsius. This then expands in a turbine driving the compressor and generator. The expanded hot gases leave the turbine at ambient pressure and at a temperature between 450 to 650 degree Celsius depending on the turbine efficiency, pressure ratio, and turbine inlet temperature. Such a power plant has 35% efficiency only. Gas Compressor It is a mechanical device which is used for increasing the pressure of a gas by decreasing its volume. Generally air is used in a power plant for compression, however, oxygen, nitrogen and other gases are also compressed. There are three general types of compressors, namely, positive displacement, axial and centrifugal. Positive displacement compressors may be reciprocating piston type, in which the gas is taken in during the suction stroke of the piston, and is compressed by decreasing the volume of the gas by moving the piston in the opposite direction. Centrifugal compressors use high speed impeller to increase the energy of the gas which is then converted into pressure in the diffuser. They are used to compress large volume of gas to moderate pressures. In Axial compressors gas is made to flow parallel to the axis of rotation of the rotor which in turn contains a number of rows of blades. As the gas passes through the blades its energy increases which is converted into pressure. This type of compressor is used for jet aircraft engines and gas turbines. Combustor It is a part of turbine where the combustion takes place. In a gas turbine, air enters the first combustion chamber after the compressor. Here, fuel is mixed with the compressed air and the exhaust is then used to drive the turbine to obtain work. A combustor should fulfill the four basic conditions: (i). Supply enough air for complete combustion of air. (ii). Secure enough turbulence for thorough mixing of fuel and air. (iii). Maintain a furnace temperature high enough to ignite the incoming fuel air mixture. (iv). Provide a furnace volume large enough to allow time for combustion to be completed. It is important to determine the right amount of oxygen that should enter the combustor. Amounts of Carbon-di-oxide and oxygen are indicators of excess air. If the amount of oxygen is more in the combustor than the required amount, it will burn fuel more rapidly and the efficiency would reduce. A combustor has three main components, namely, the outer casing which is the high pressure container, the combustion chamber, and the fuel injection system. [1][4] Turbine A steam turbine is a prime mover which continuously converts the energy of high-pressure, high temperature steam supplied by a steam generator into shaft work with the low temperature steam exhausted to a condenser. This energy conversion essentially occurs in two steps: (i). The high pressure, high temperature steam first expands in nozzles and comes out at high velocity. (ii). The high velocity jets of steam coming out of the nozzles, impinge on the blades mounted on a wheel, get deflected by an angle and suffer a loss of momentum which is absorbed by the rotating wheel in producing torque. A steam turbine is basically an assemblage of nozzles and blades. The fig of a Turbine is given below. Many types of turbines are used in Power Plants, namely: 1. Steam turbines are used for electricity generation in thermal power plants, i.e. plants using coal and fuel. 2. Gas turbines are also called turbine engines. Every turbine is provided with an emergency control lever which can immediately shut down the running of turbines in case a catastrophy occurs. Each power plant has a fixed turbine rotation rate. These rates at which the turbines rotate are different for different process. In a power plant the turbines fail to operate if: 1. Shaft speed exceeds 3300 rpm 2. The lubrication system fails 3. Turbine balancing is not proper 4. Temperature of plant increases 5. Cooling mechanisms not working properly Control And Supervisory Instruments: Many control and supervisory instruments are provided for the safe and effective operation of a turbine. They are as follows: 1. Pressure gauges are used to monitor the pressure of main steam at various valves. 2. Thermometers are used to record temperatures at every valve and in the combustor valve. 3. A Speed recorder is used to monitor the turbine rpm all the time and in case its speed increases beyond a set value then it is deactivated. 4. Watt meters and voltmeters are used to determine the steam and heat rates at various points in the process. 5. A trip control lever is provided in case of an emergency. Generator It is a device that converts mechanical energy into electrical energy. A steam generator generates steam at the desired pressure and temperature by burning fuel in its furnace. A generator forces electric charges to be in motion through an exterior electrical circuit, but it does not create electricity or charge, which is already present in the wire of its windings. As it can be seen from Fig 4, heat is produced in a generator because of losses caused by current flow in the stator and field windings. This affects the temperature in the generator. By using cooling mechanisms such an event can be avoided. Generators are usually cooled using hydrogen at very high pressures say at 3 bars. Hydrogen is used since its specific heat is the highest and its molecular weight is the least. Combined Cycle Power Generation The Carnot efficiency is the efficiency of an ideal thermal process. Generally the efficiencies of some processes are less since there are a large amount of losses involved. Thus, a distinction between energetic and exergetic losses is drawn. Energetic losses are mainly losses incurred due to heat, and are thus the energy lost in the process. Exergetic losses are internal losses caused by irreversible processes in accordance with the second law of thermodynamics. The process efficiency can be improved by raising the maximum temperature in the cycle, releasing the waste water at a lower temperature or by improving the process to minimize the internal exergetic losses. The interest in combined cycles arises particularly from these considerations. Although, no single cycle can make all the improvements. It thus seems reasonable to combine two cycles to one. Supplementary firing may raise the exhaust temperature to around 900 degree Celsius. Also, high gas temperature raises the condition of steam which in turn improves the efficiency of a power plant. The two thermodynamic cycles generally used in a combined cycle power generation are Brayton cycle and Rankine cycle. Brayton Cycle In Brayton cycle the air is first compressed and then at constant pressure reversibly heat is added to it. Due to this, expansion of air takes place in the turbine. This leads to emission of hot gases at a constant pressure which helps in bringing it to the initial state. The Brayton cycle consists of 4 cycles in total, out of which two are reversibly isentropic and the other two are reversible adiabatic. Also a Brayton cycle is called as the air standard cycle for the gas turbine power plant. [1] Cycle Processes: A. 1-2 Isentropic Compression (q = 0) B. 2-3 Isobaric Heat Addition (w = 0) C. 3-4 Isentropic Expansion (q = 0) D. 4-1 Isobaric Heat Rejection (w = 0) Rankine Cycle We can use a hypothetical value for every process in the vapor power cycle which represents its basic intended operation and something which does not produce any extraneous effect. From the steam boiler, it is used as a constant pressure heating process to convert water to form steam, for the turbine as an ideal reversible adiabatic expansion of steam, for the condenser it is a reversible constant pressure heat rejection as the steam condenses till it becomes saturated liquid, and for the pump, the ideal process is the reversible adiabatic compression of this liquid ending at the initial pressure. When all these four processes are ideal, the cycle is called a Rankine cycle. There are four basic steps in a Rankine cycle: Step1-2: working fluid is pumped to high pressure from its initially low pressure state. This process requires low energy. Step2-3: the high pressure working fluid then enters a boiler where it is heated continuously such that it becomes dry saturated vapour. Step 3-4: the dry saturated vapour is then used to turn the blades of a turbine to generate power. The temperature and pressure of the working fluid decreases. Step 4-1: the wet vapour then enters a condenser where it is condensed to become a saturated liquid. District Heating A district heating system uses hot water to bring heat to towns and communities rather than using electrical power. This technology is quite old. The oldest district heating system which is still in operation was used to warm a French village from geothermal hot springs in the fourteenth century. Later on, US were the first country to use the process of district heating in plants. A steam district heating system has been in use by the US Naval Academy since 1852. The first commercial system began in Denver in as early as 1880. As of today, nearly 30,000 district heating plants are working in the US and there are a thousand more around the world. A district heating plant contains insulated pipes which carry hot water from the plant to various sites. Also these pipes are interconnected between various buildings through a junction point as can be seen from Fig 7. From these junction points, hot water is taken from the mains to a heat exchanger which is also called a heat sub-station and present inside each building. Because of this the heating circuit which is present inside each building can be isolated from the main heating system. A temperature sensor is present on the heat substation which monitors the temperature of water at all times. Also a meter is attached, which calculates the amount of water consumed by each apartment or building and are charged accordingly. To ensure safe and smooth running of the plant, human intervention is reduced by running the plant automatically. Advantages Of Combined Cycle Power generation The worldwide demand for combined cycle power plants is growing dramatically because of its large advantages, namely: (i). High overall plant efficiency: up to 70% can be obtained. (ii). Low investment costs: up to 30% lower than that required for a conventional steam power plant. (iii). Small amount of water required: amount of cooling water required is only about 40 to 50% as much as for a steam plant. (iv). Great operating flexibility: the simple steam cycle makes it possible to start up and shut down the plants quickly which also affects the efficiency. (v). Phased installation: because the gas turbines can go into operation much sooner than the steam plant, installation in stages is possible. The gas turbine can keep on generating power as the steam plant is under construction. This makes it possible to adjust the growth in demand for energy in a grid. (vi). Simplicity of operation: combined power plants are fully automatic and are suitable for operating where the operating staff is less experienced. (vii). Low environmental impact: because of their low emission levels and high efficiency, such plants are suitable for use in a heavily populated region. [1][5] Components Of A Combined Cycle Power Plant The major components of a combined cycle power plant are listed below: i. Fuel: Different types of fuel may be used, namely, natural gas, coal, oil, petrol, diesel or any other conventional source of energy. Generally, natural gas is used as primary fuel. Also, experiments are being conducted to use renewable sources of energy like solar energy, wind energy, geothermal energy, nuclear energy etc as the main source of fuel. Using renewable source if energy would decrease the cost of running the plant tremendously and increase the efficiency as well. [2] ii. HRSG (Heat Recovery Steam Generator): HRSG is a heat exchanger. It is the link between the gas turbine and the steam turbine process. It is used to recover heat from a hot gas stream. It produces steam that can be used in a process. HRSG are commonly used in a combined-cycle power station, in which the exhaust is fed to the HRSG to generate steam which in-turn drives a steam turbine.There are three main types of HRSGs, namely: 1. HRSG without supplementary firing. 2. HRSG with supplementary firing. 3. Steam generators with maximum supplementary firing. HRSG without supplementary firing are the most common. Its main function is to convert the exhaust energy of gas turbine into steam. [2] iii. Deaerator: the main function of a Deaerator is to remove air and other dissolved gases from the water or steam in gas/steam cycle. This is necessary as the high oxygen content present in the steam/water corrodes the components of a plant along with the pipes. Generally, oxygen content of more than 7 to 10 parts per billion(ppb) is highly dangerous. Deaeration should be done continually since small leakages of air at air flanges and pump seals in the part of the cycle vacuum cannot be avoided. The solubility of the gases increase at a higher temperature and low pressure. A Deaerator removes these gases by heating the feed water to the saturation temperature. This feed water then passes through a heat exchanger after which it is sprayed from the top. By coming in contact dissolved oxygen and carbon di oxide get released. The Deaerator is usually kept in between the feed water system such that the total pressure difference between the boiler and the condenser is shared equally betw een the condenser pump and the boiler feed pump. The Deaerator is not used water cooled nuclear power plants as there is a danger of radioactive substance release. There are two types of Deaerators: a. Tray type Deaerator b. Spray type Deaerator iv. Control System: In todays world almost all cycles are automated in order to improve the efficiency and at the same time reducing human intervention. Control system is to a power plant what a brain is for a human body. Supervision, control, performing operations in a safe and reliable environment, continuously checking for leakages and faults is all done by the Control System. For this reason, the control and automation systems of a combined cycle power plant form a relatively complex system even though the thermal process is fairly simple. Fully electronic control systems are employed in todays modern combined cycle plants. The main features of the control system for a combined cycle power plants are: 1. Truly distributed architecture 2. Complete range of functions for process control 3. Communication capability due to several bus levels 4. Compliance with standard communication protocol 5. Openness for third party applications 6. On-line programmability with easy creation/editing of the programs v. Cooling system: An engine that is not cooled will soon reach a temperature which will seriously harm its functioning. If the heat is too intense it can cause the lubricant to burn up, leading to souring of cylinders, burning of pistons and bearings or any of variety of other mechanical troubles. Especially in a power plant where combustion of fuel continuously takes place for power generation, excess heat is like an enemy which needs to remove as soon as it is generated, least it would be dangerous. Two types of cooling systems are used, Air cooling and Liquid cooling. vi. Cogeneration: It is the simultaneous generation of electricity and useful heat. It is basically a recycling process. In conventional power plants, the waste heat is released into the atmosphere. Cogeneration captures this heat and re uses it for industrial heating purposes. In processes like district heating temperatures up to 130Â °C can be reached. Manhattan is the biggest steam district in the world. Many European countries also make use of this technology. Using cogeneration a bottoming plant captures the byproduct heat for domestic and industrial purposes thus increasing the overall efficiency of a plant. Paper and textile mills, chemical factories, sugar factories etc are few of the many industries which use saturated steam as the desired temperature for many purposes like heating and drying. For constant heating or drying steam is used. Also, the industry also needs power to drive its various machines. For this purpose combined cycle plants which use cogeneration are used since it serves both the purposes. District Heating Through Cogeneration Cogeneration involves the production of both electricity and thermal energy simultaneously from a common fuel source. The rejected or exhaust heat is used here for the process of district heating. Other applications included Desalination cooling. District heating is the latest technology for heating of homes and buildings in cold places like Europe. Heat which is produced in the thermal section in form of hot water is transported to houses and other areas using insulated pipes, such that the temperature doesnt change and a separate boiler is not needed at the receiving end. Vapor Absorption System A vapor absorption system can be used in the process of district heating. This system uses Ammonia which has a relative lower boiling point than water. Thus, less heat is needed to heat the water. Later ammonia can be removed from the water-ammonia mixture and reused again. The flow chart for such a system is as follows: Advantages Of District Heating There are many advantages of using this technology. A few of them are as follows: 1. Heat is transported to the urban areas using a heat exchanger which has a longer life. 2. Water is the main carrier. It can be easily procured from sea (desalination) or underground water. 3. Heating equipment takes less space and can be easily installed. 4. It can be used all year along without ant breaks. 5. Efficiency is more. 6. Distribution system is controlled using Computer which automatically increases or decreases the amount of water being delivered, depending upon the needs. Operation Of A Combined Cycle Power Plant Usually a combined cycle power plants are operated automatically. There are switches available which make it possible to activate the starting or shutting down of the equipment from a central control room. The commands may be given by operating staff or from a high level starting program which runs automatically. The start and stop are decided on several parameters which are pre defined in the program. Because the plants have a shorter start up time and an even quicker load change capability, the combined cycle power plants are often called to be dynamic in its behaviour. It is also quick in reacting, thus it is capable of following up quick changes. [2][6] Modern CCPP in the 50-400 MW range can be started within the following times: For a combined cycle power plant, Start up procedure is divided into three stages: 1. HRSG purging 2. Speeding up and synchronization of Gas turbine 3. Speeding up and synchronization of Steam turbine Purging of the boilers is a very important process. It prevents any explosion from unburned hydrocarbons by running the gas turbine at a high ignition speed of about more than 30% of normal speed, which helps in blowing of air through the HRSG. Purging then depends on the volume of gas left behind in the gas turbine. After the purging has been done, the gas turbines run at nominal speed, synchronized and loaded to the desired level. [7] Programmable Logic Controller Plc Definition A programmable Logic Controller, which is generally called as PLC, is a state of the art, digital industrial computer. A programmable logic controller is an industrial computer in which control devices such as limit switches, push buttons, temperature sensors or pressure sensors provide incoming control signals into the unit. An incoming control signal is called an Input. Incoming control signals interact with instructions specified in the user ladder program, which tells the PLC how to react to the incoming signals. The user program also directs the PLC on how to control the field devices like starter lights. A signal going out of the PLC to control a field device is called an Output. [5] Advantages Of Plc The main advantages of using PLC in the field are as follows: (i). Gain complete control of the manufacturing process (ii). Achieve consistency in automation (iii). Improve quality and accuracy (iv). Work in difficult hazardous condition (v). Shorten time to market (vi). Lower the cost of quality, scrap and rework (vii). Offer greater product variety (viii). Control inventory[5] How Does PLC Work Microprocessor is the main working brain of all the computers. The computers microprocessor, which is technically known as the central processing unit (CPU), supervises many controls and instructions as defined by the user. The microprocessor responds to the input signals and follows the instruction that it has been programmed to do. When the PLC is running and is following the programmers instructions it is called as solving the user problem. PLCs follow the instructions that are stored inside their memory. Also they may store programs for future use. Each instruction that has been entered will be placed inside the memory in the increasing order. These lists of instructions are called as a Ladder diagram. A basic PLC and its components are shown below. The instructions that are required to be carried out are transferred to the memory of the controller using a computer. The ladder diagram is made by the user using various kinds of latches, timers, counters and other accessories available with the software. After the ladder diagram has been verified and corrected, we download the program into the processors memory. Downloading basically means transferring the program from a personal computers memory to the logic controllers memory. Before downloading a user program, the processor must be in the program mode. After downloading the entire program all the wires have to be connected properly unless the required outputs would not be shown. Also, one can download the program as many number of times as it may be required. The continual running of the program in the PLC is useful in continuously determining if any input is being changed by the user or not. This process is called scanning. According to the commands given and the kind of timers or counters used, the output would be shown which is basically turning of the output light, which is present on the right hand side of the controller. A PLC interfaced with a computer is shown below. The PLC has come a long way since the first time it was used for industry applications. In these years, the PLCs usage has been increased drastically. It has been designed to withstand the harsh temperature. Since mostly PLCs are employed in industries where the temperature is usually on a higher side, they have been made resistant to heat. It is for this reason it is called as industrially hardened device. Also PLCs are small and easy to store. Also they require minimum of space. Also PLC gives the user the ability to try new things. The PLC can easily be programmed for any number of times. The programs are developed from the ladder diagrams. As an industrial computer, the PLC can easily replace functions of timers or counters. Also any type of sequence can be tried on the software. Also these days functions like arithmetic and data manipulation or shift registers have been made available along with the software which has increased its range of operation. The main benefit of using PLC is easy troubleshooting. In industries ladder diagrams may span for many pages. As a result it becomes very difficult to identify the errors. However, PLC software comes with an inbuilt troubleshooting device which tells the user where errors have occurred, if any. This helps in easy identifying of the problem and saves precious time. PLC, thus, is a very important tool in industry usage. RS LOGIX 500 RSLogix is a used to run a particular or a full segment in an industry. RSLogix is a product of Allen-Bradley, which provide the best industry controllers. This software offers unbeatable productivity and is widely used in industries. A simpler version called RSLogix 500 was made by Allen-Bradley for laboratory purposes. I have used this software for interfacing different cycles in a combined cycle power plant. RSLogix 500 offers [5]: (i). Flexible easy to use editors (ii). Diagnostics (iii). Troubleshooting tools (iv). Time saving features and functionality Simulation On Rs Logix 500 The project was divided into three parts: 1. Brayton Cycle 2. Rankine Cycle 3. District Heating Ladder diagrams for each were constructed after thoroughly understanding each process in detail. Use of timers, counters and switches were made in the ladder diagrams to illustrate limit switches. Temperature and pressure values have been assumed and are not based on actual standards. RSLogix 500 provides with a large variety of instruction palettes, like normally open closed switches, timers, counters etc. Values of temperature and pressure sensors were assumed and are not based on factual data. Also, various kinds of up-counters and down-counters along with many types of timers were used in designing of the ladder diagrams. I started with designing of ladder diagram for Brayton cycle. Then I designed a Rankine cycle which uses the waste of Brayton cycle as the input and lastly I designed a District Heating plant which uses the wasteful outputs of both Brayton and Rankine cycles. A Combined Cycle Power Plant increases the efficiency of a power plant by almost double. As a result, its usage is increasing globally as more and more simple plants are being converted to combined cycle power plants. Given below is the figure of an instruction palette as seen in the software. After the Ladder logic is entered, the whole file or project is verified without errors and is given access for download. The figure for the same is given below: Brayton Cycle The ladder diagram is as shown below. It has a lower efficiency than a steam cycle. The above figure shows the ladder diagram for the Brayton Cycle. The first rung illustrates the fuel which is supplied. I have taken Natural gas as the main source of fuel and Diesel for emergencies. The fuel mixes with Air. The ratio of fuel: air is about 1:30. A timer which acts like a pressure sensor is attached in parallel with the compressor. Since this timer is attached to a done bit, it cuts off the fuel and air supply after 15 seconds. This is so done since it is assumed that after, say 15 seconds, the pressure in the compressor reaches 200 Bar. If the compressor is opened for more time, then the compressor might blow off because of extreme pressure. This pressure I have assumed is totally hypothetical and varies with the type of material used in the making of the compressor. After the air and fuel gets compressed i.e. the pressure increases and the volume decreases (according to Boyles law), then the compressor valve opens. The compressor mixture then enters a combustor wher e the combustion takes place. I have attached a up-counter in parallel with the combustor. The up-counter does the same function