Designing and Analyzing Bearings for Offshore Wind Turbine

• The course work aims to address all the module learning outcomes by focussing on the sustainable systems’ design and operations. To be specific, the tribology mechanisms, qualitative and quantitative reliability measures, condition monitoring and structure health monitoring of the systems.
• The module learning outcomes are provided in the coursework brief.
• University requests all student to use a uniform coursework cover sheet for submission. Please use the assessment cover sheet provide in the Blackboard to submit the coursework as a single document.

1. The assignment should be your own original work and should be properly type-written in your own words. It will be checked for plagiarism using Turnitin. Any plagiarism or copying from others will be dealt through the university’s plagiarism procedures. Similarity (plagiarism) level higher than 10% is highly suspicious.
2. The whole report should be 1500 words plus any relevant material. Any references to materials should be given in standard Harvard or Vancouver form.
3. Your assignment must be submitted electronically via blackboard by the submission time or before. The report should be contained in a Word document or pdf document. No other means of submission will be accepted.
4. Drawings can be done by hand or electronically. They can either be scanned / copied into your Word or pdf document.
5. Any assignment submitted late, but within 5 working days of the deadline, will be given a maximum mark of 50%. Assignments submitted more than 5 working days after the deadline will not be marked, and a mark of 0% will be recorded.
6. Students with special needs will be addressed on individual basis. (Candidates that may require any special requirement will be dealt with on a one-on-one basis which must be discussed with the module tutor/lead before the due date).

Learning Outcome to be assessed:

This assignment is structured that students show evidence for partial fulfilment of the following module learning outcomes

1. Design a bearing assembly that minimises friction and wear.
2. Perform qualitative and quantitative analysis on mechanical systems.
3. Design a complete conditioning monitoring system for a machine using ISO standards.
4. Design of complete structural health monitoring system using SAE/ ISO standards.
5. Analyse a design for its reliability and maintainability using ISO standard techniques.

By submitting electronically, I confirm that this piece of submitted work is all my own work (unless indicated otherwise within the assignment) and that all references and quotations from both primary and secondary sources have been fully identified and properly acknowledged in the body of the writing, with full references at the end.

Renewables provide nearly a third of UK power in the UK and half of this is generated by from wind energy. Generation from onshore and offshore wind in the UK are central to the shift to an energy system fit for the future. One British Green Energy company is planning to construct a wind turbine system. You have been asked to design and analyse data for this renewable energy focused company.

This is an open assignment, so the result and viability of the bearings is not known.

? To design and select materials for a reliable shaft/bearing assembly that can be used for the above mechanical structure and minimises friction, wear and maintenance.

? To construct a reliability block diagram (RBD) analysis for the simplified wind turbine model and perform failure mode effects analysis (FMEA) for the same model.

? To propose a monitoring system (sensory- actuation system) that can be used to monitor system operational condition and prevent system/ sub-systems failure.

As an engineer in the ‘Green Energy’ company you have been asked to design the bearing for the offshore wind turbine. In addition to the bearing design you are also requested to construct a reliability block diagram, perform FMEA analysis and propose a monitoring system for the above model. The design process should take into consideration the main dimensions of the mechanical structure and materials of the shaft and bearings.

Provide a detailed, professional report that contains the following items mentioned below:

1. Selection of dimensions of the offshore wind turbine. Define the design parameters and state any required assumptions.

Hint1: The dimensions are not given, you decide. You can make it as small or big as you wish as long as it serves the intent purpose. Use the basic bending and torsion equation formulae for calculating the stresses and loads.

2. Selection of the rolling element bearing diameter. You will need to justify your selection. Selection of bearing (diameter/width), calculation of forces and pressure on the bearing. Hint2: The weight of the wind turbine is not given and need to be estimated or assumed by you.

3. Look through different online resources to find the failure data for various components of the offshore wind turbine model. Construct a reliability block diagram (RBD) analysis for the simplified model. List out all the assumptions you have made in the construction of the RBD.
4. Perform the failure mode effects analysis (FMEA) on the offshore wind turbine model. Discuss and compare the salient features of similarities and differences of the quantitative method like RBD over qualitative method like FMEA.

Hint4: Review the FMEA method and perform the FMEA analysis on the motor.

5. Propose a monitoring system (sensory- actuation system) that can be used to:

- Monitor the operating condition of the wind turbine transmission part.

- Predict the failure transmission elements.

Describe in detail the main elements of the system. Use block diagrams to support your discussion.

The Department’s Principles of Assessment will be used to determine grading levels.

1 Selection of dimensions of the offshore wind turbine. Define the design parameters and state any required assumptions.

2 Selection of bearing diameter. You will need to justify your selection. Selection of bearing (diameter/width), calculation of forces and pressure on the bearing.

3 Look through different online resources to find the failure data for various components of the offshore wind turbine model. Construct a reliability block diagram (RBD) analysis for the simplified model. List out all the assumptions you have made in the construction of the RBD.

4 Perform failure mode effects analysis (FMEA) on the offshore wind turbine model. Discuss and compare the advantages and disadvantages of quantitative method like RBD over qualitative method like FMEA.

5 Propose a condition monitoring system (sensory - actuation system) that can be used to monitor system operational state and prevent system/ sub-systems failure. Describe in detail the main elements of the system. Use block diagrams to support your discussion.