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Q1:Scenario, Assignment Brief and Guidance: Scenario: You are an engineer working on a wind turbine "green energy" project for BCP City Council. Their wind turbine blades are not lasting as long as predicted, and in-service problems do not match predicted life from laboratory test results. You have been tasked with reviewing and evaluating a number of possible materials for the improved manufacture of wind turbine blades, so that they last longer and are more reliable. Blades have failed in the past because of a build-up of electromagnetic charge, excessive heat, corrosion, mechanical strain and failure. Assignment Brief:/nAssignment Brief: Activity 1: Some wind turbine blades have cracked, failed or twisted (reduced 'angle of attack' and hence performance) in-service in much shorter times than predicted. Using the data from your laboratory tests, prepare and present a report that compares and contrasts the following: • torsion test results of four materials (two metallic & two non-metallic) against theoretical results (you may use the theoretical data from APPENDIX 1: Material Shear Modulus Data) • beam deflection test results of four materials (two metallic & two non-metallic) against theoretical results (you may use the theoretical data from APPENDIX 2: Modulus of Elasticity Material Data) Evaluate any differences and suggest why real-world & laboratory test results for wind turbine blades could differ from theoretical data. NOTE: Include evidence, photos and results of your laboratory tests in your report. So that your audience can understand the context of your report, you will need to describe how the structures of the different materials relate to their properties. You will also need to refer to the types of degradation that are most common in the four materials, and how relevant that is to the wind turbine blade application. Use citation/references using the Harvard referencing system where relevant. Show and explain any formulae used and calculations.See Answer
Q2:Instructions: Need to write a discussion in 200 words on any 1 option. Support your discussion with facts, graphs, pictures and follow all the instructions in the file. Need to write 2 peer responses in 150 words each. Posts and opinions will be provided later.See Answer
Q3:Question 5 You are preparing a one-line electrical drawing for a grid-tied PV system with battery backup, which of the following is the right components order (starting from PV modules and ending at the utility Grid): O Inverter-disconnect-meter-PV array-battery O PV array-disconnect-inverter-meter-battery O PV array-battery-inverter-disconnect-meter O PV array-battery-meter-inverter-disconnect Question 6 The Installer is responsible for: 1 pts O Inspect PV system for code compliance 1 pts Designing the PV system according to the local and national standards Installing PV system according to the local and national standards O Designing the PV system according to the local and national standards AND Installing PV system according to the local and national standardsSee Answer
Q4:Question 11 Based on the data presented in both of the PV 2014 IEA roadmap and the STE 2014 IEA roadmap, which solar technology has greater solar market share? O STE is leading the global solar market and PV comes as second place O PV has greater global solar market share than STE O CPV is leading the global solar market The market of the solar technologies is equally split Question 12 Based on Question 11, what is the main reason that one technology outnumbered the other? 1 pts O STE is much simpler technology that uses mirrors and with larger plants it makes economical sense to be leading the solar market with cheaper initial cost O PV prices are going down and the development of new CSP still cannot compete with the low PV prices O CPV generates more per unit area power and it occupies less land space which makes it more economical choice to outnumber PV technology O Since the market is equally shared, that indicates that the prices are all the same for STE, CPV, and PV 1 ptsSee Answer
Q5:Question 9 A Commercial PV systems can fall into which of the following PV market segments? O Residential O Utility scale O Non-residential O All of above Question 10 Commercial PV systems are cheaper to install when compared to: O Residential O Utility scale O Non-residential O All of the above 1 pts 1 ptsSee Answer
Q6:Incorrect Question 1 You had a conversation with friends about PV technology, before taking the lesson. Some people used the term PV modules and other used PV panel. Which of the following is correct? A "Module" is a combination of PV cells They are the building block for PV array "Modules" are also known as PV "Panel" and they can be used interchangeably 0/1 pts O All of the aboveSee Answer
Q7:Question 4 On the current-voltage characteristics of PV module, the highest current occurs: At maximum power point When Voltage equals Zero At open circuit condition None of the above ptsSee Answer
Q8:ct Question 5 On the power-voltage characteristics of PV module, the highest power occurs: At maximum power point condition At short circuit condition At open circuit condition None of the above 27 0/1 ptsSee Answer
Q9:Incorrect Question 7 On the current-voltage characteristics of PV module, the Voltage changes with: ⒸHigher irradiance and temperature Lower irradiance and temperature The operating point corresponding to the load requirements All of the above 0/1 ptsSee Answer
Q10:Question 8 You have the choice to design PV system in one of the following cities: Denver, CO (High irradiance with Low temperature) Phoenix, AZ (High irradiance with high temperature) Seattle, WA (Low irradiance with average temperature) Which city will offer ideal operating condition (better energy yield): Seattle, WA Phoenix, AZ Denver, CO They are all the same 27 0/1 ptsSee Answer
Q11:Question 11 The bypass diode is installed on PV module so that: Current always flows through it to prevent cell damage Current flows through it once a day when voltage across the modules equals Zero Cells can be shaded without any damage so this diode is almost never used 0/1 pts Provides alternative path for current to flow when cells are shaded to prevent cell damage when module is shadedSee Answer
Q12:ct Question 12 Blocking diode is used to: Blocks modules from operating at short circuit Blocks over voltage when modules are shaded Protect PV string from acting like a load for other parallel strings when modules are shaded in that string All of the above Need final answers for all the answers 0/1 pts 4See Answer
Q13:Question 13 You are purchasing solar PV modules, you noticed STC and NOCT specification are listed differently. To make things more interesting, you found out PTC test standards are different as well!! What is the reason? (choose all that apply): PTC simulates how close to the real field operating conditions the modules are NOCT and STC specify the operating temperature differently ✔PTC, NOCT and STC can be used interchangeably so numbers don't count STC is the only standard we should use 0/1 pts Need final answers for all the answersSee Answer
Q14:Deliverables: 1) Need to reply on both the posts (attached) 2)1-1.5 pages (for both) 3) Double spaced 4) APASee Answer
Q15:2. Regarding the derivation of the ideal HAWT with wake rotation using momentum theory a. What is the definition of the angular induction factor? b. Show the two key equations that are equated in derivation of Cp when including wake rotation. c. Use the equation derived for Cp,max (Manwell Eqn 3.40) and calculate the Cp,max for a blade operating at a tip speed ratio of 4.0. Show the calculation methodology.See Answer
Q16:5. Using the Lift and Drag curves for the NACA 4412 airfoils included with this assignment, calculate the lift L and drag D forces on a NACA 0012 airfoil with the following assumptions. (Note: the C₂ curve passes through zero.) Standard roughness at Re = 3 million Operating at 8 degrees angle of attack Relative wind of 12 m/s, Chord, c, of 3.5 meter Span, dr, of 5 meters Air density of 1.10 kg/m3.See Answer
Q17:Question 1 An array or collection of arrays that generates DC power is referred to as: PV power source PV source circuit PV output circuit None of the above 1/1 ptsSee Answer
Q18:Question 2 The circuit connecting the PV power source to the rest of the system is referred to a PV power source PV source circuit PV output circuit Comment None of the aboveSee Answer
Q19:Question 3 3 The circuit connecting a group of modules together and to the common connection point of the DC system is referred to as: PV power source PV source circuit PV output circuit Comment None of the above verify- 171 pisSee Answer
Q20:1. A land based wind turbine has a has hub height of 150 meters. The weight of the machine head and rotor is 200 metric tons. Other assumptions you can make a. Operating range of rotor 4 to 15 RPM b. 350 MPa yield strength of steel c. Young's modulus of 210 GPa d. Tower outside Diameter of 5.5m, at the base tapering to 3.0 m at the top. e. Wall thickness = 25mm, made of steel f. This is an upwind rotor Estimate the following: b. a. The static (0 RPM) stress at the bottom of the tower including the tower weight. If the rotor thrust load is 50,000 N at a particular operating regime, what is net compressive stress on the downwind side of the tower. c. If the tower natural frequency can be expressed as 3EI fo where I=(Doutside - Dinside) 277 (0.23mtower+mnacelle) L³ Generate a simple Campbell diagram with 1 per and 3 per revolution lines and confirm that the turbine will not operate in an area of concern with resonance.See Answer

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