Hybrid Power System Coursework Example | Topics and Well Written Essays - 6250 words

Hybrid Power System - Coursework Example The paper tells that the power system of choice which best suits this project is â€Å"Hybrid Power System†. This system employs combination of Off grid renewable energy technologies among which we are going to use a combination of Solar, Wind, Hydropower and for an emergency back up a gasoline/diesel generator is also provided. Hybrid power system is selected due to two reasons, firstly because it can be established off-grid to satisfy small demand of electricity and long distribution infrastructure can be avoided. Secondly as we are aware that none of the available sources of energy ie Solar,Wind or Hydropower are available continuously and change due to sunshine, high and low flow of wind and water, hence they cannot meet the base demand of the facility and have to be used intermittently. On a macro scale the Hybird system work in three phases, production, Power electronics and Consumption. The production is done by the Renewable Energy system, stored by batteries and in ca se of backup by generator. Then the Power Electronics regulates the supply and transmission of the power to the appliances where the load is required. To meet the base demand of 100KVa at a power factor of 1, thus energy requirement of 100KW we will include a system setup which will include three complete 20 kW solar panels. The photovoltaic systems that are available in the market are of 20kW, 50 kW and 100 kW and thus it has been concluded that three 20 KW panels are used. In case of failure of one, the system does not collapse completely. The next component in the Hybrid system’s energy input is the wind turbines. ... For which it is suggested that Volute axial flow water turbine generator is employed and several similar assemblies of this turbine is used for the production. It is calculated, that with Volute axial flow water turbine generator, a head of about 2 meters and flow of 85 liters/sec a power of about 1 KW can be generated. Where as in our case the flow of 1800 to 2500 liters/sec several similar assemblies can be installed.It can be concluded that about 25 KW energy can be generated by Hydropower. The picture, details, specifications and references of Volute axial flow water turbine generator are given in Appendix 3. Lastly the question arises that how is this whole system going to work as one and deliver the requirements. To explain the whole working of the Hybrid System the following flow diagram is presented which shows how the required AC current and load is produced and transmitted in the system. The figure shows how the AC main bus line is used to produce, store and then transmit t he load. This is the complete power system under consideration. 2. Explain the scientific principles involved in your choice of power system. The scientific principles involved in the individual power system are as follows. Solar Power System The solar energy depends on two things, firstly the solar radiance and secondly the nature of the PV cell materials. The PV cells have two types of materials p-type silicon and n-type silicon. When the light strikes the cell surface, it transmit energy and ionize the atoms in the silicon material, due to this there is development of internal fields and then a junction separates the positive and negative charges in the PV cell. The positive charges go into the P-Layer and the negative

Similarities and differences between The Big Sleep and Casablanca in Essay

Similarities and differences between The Big Sleep and Casablanca in Camera shooting - Essay Example The movie is based upon the novel by Chandler but differs considerably owing to changes in the content in some cases. The camera movements of the two classic movies encompasses the expressionist style along with some unique approach as suitable for a romantic melodrama (Casablanca) on one hand and a thriller (The Big Sleep) on the other. Almost the entire shooting of Casablanca takes place in the Moroccan city of Casablanca and the entire shot was almost held in the studio itself. It is one of the classic movies shot in black and white. The cinematographer Arthur Edison uses the Curtiz style of camera movements or expressionist lighting where the lights and shadow effects are used to create expression. The focus of the camera lies mainly on Bergman enacting the role of Ilsa Lund. The camera angle is mostly placed such that the shots are moved from the left side of her face as per her preference. To enhance the expressions of sadness, tender and nostalgia. This is especially true in the scene where she meets Rick alone. Symbolic shadows are cast on the characters to highlight essence of certain situations. The camera moves across a doorway with the inscription on stone "Liberte, Egalite, Fraternite" standing for Liberty, Equality, Fraternity, a common saying amongst the French Repupublicans. The Vichy govenrment has not yet replaced it. The cinematography uses the smooth movements of the camera along with this expressionist lighting with the environment serving as the backbone to highlight each moment and interplay of emotions. The establishment of Rick was built in three parts which were separated from one another. Hence the camera was set such that it looked through one of the walls of the cafà © into Rick’s office. Camera is held at close ups where the objects or the individual is significant and indicates something more important than the eye