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ER1630 Engineering Applications Assignment Help

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ER1630 Engineering Applications Assignment - University of Central Lancashire, UK

Assessment Title - Data Acquisition and Analysis

Learning outcomes - The assignment should produce sufficient evidence for partial fulfilment of the following module learning outcomes:

LO1. Develop a program utilizing object oriented programming.

LO2. Apply computer-based techniques to engineering problems.

LO3. Write effective formal written reports.

1. Background Information - Wind turbine technology is at the heart of the UK Government's commitment to providing 20% of electricity generation by 2020, and is integral to its efforts to reduce greenhouse gas emissions that will lead to climate change.

A wind turbine typically consists of a ROTOR, a GENERATOR and a means of placing the rotor into the highest wind and keeping it from striking the ground, a TOWER is the usual structure used. The capability of a wind turbine to generate electricity is governed by its ability to extract kinetic energy from the wind and converting it to torque for a rotating generator. Control of wind turbines has a dual purpose: to produce maximum power from the wind, and to protect the turbine from damage and unnecessary wear. Maximum power is produced by careful control of the direction the turbine faces and the angle of the blades on the rotor with respect to the wind direction. The power density (power per unit area) available in the wind is given by

Pw = ½ρv3

where Pw = power per m2, ρ = density of air, kg/m3 and v = velocity of air, m/s

The ability of the turbine to produce electricity, i.e. the power efficiency of the turbine, is given by a parameter called the Coefficient of Performance, Cp. This number is the ratio of the power generated by the wind turbine to the power available in the wind. Note that the theoretical maximum power efficiency of any wind turbine is 0.59; this number is called the Betz limit.

The power produced by a turbine is therefore obtained from the following:

PT = ½ρCpAv3

where A is the swept area of the turbine rotor.

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2. Assignment Details - You have been provided two datasets comprising metrological data recorded through 1 month and the power output from a large wind turbine recorded at the same time. You are to make suitable corrections to any errors that may be evident and produce a formal report describing the performance of a wind turbine and the available wind resource. Your report will consist of a description and analysis of the data in the files 'meteorological data' and 'turbine data' and a number of figures.

These data have been acquired from a wind turbine with a diameter of 85m, forming part of a large wind farm.

Your report should include the following:-

Part 1 - A labelled plot showing the wind speed data against date/time. Comment on its variability.

Part 2 - A histogram of the wind speeds with comments on the mean, mode, and skewness.

Part 3 - A labelled plot showing power against wind speed and a description of how the turbine performance varies, with particular reference to the maximum power generated and power output at low wind speeds.

Part 4 - Obtain a line of best fit of the graph obtained in (C) (try using a 4th order polynomial) and add it to the plot. Using you line fitting method, produce a table of estimates of power output for wind speeds 4-20 m/s.

Part 5 - Using a calculation for air density, plot a graph showing how the ratio between the power generated by the turbine and the available power in the wind, Cp, changes with respect to wind speed. Add a line approximating best fit.

Part 6 - Comment on the efficiency of the turbine as calculated from the coefficient of performance: do the data look right?

Note - Report should also contain a brief description of wind turbine technology (you will need to do some reading around the subject and use references correctly).

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