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Faculty of Computing, Engineering andMedia – Course work Specification
Title of the Assignment:
Assignment A: Techno-economic Assessment of Local Energy Systems
This coursework item is:
Formative & summative
This Formative coursework will be marked anonymously
This coursework assesses your ability to: Assess and compare the renewable energy potential of multiple locations. Build load profiles and deduce their effect on the economics of local energy systems. Analyse the performance and economics of a local energy system. Identify trend in data and make informed inferences from this. Appreciate the factors considered in the design of renewable energy systems. Produce a well-written report appropriate for postgraduate level. Deliverables to be submitted for assessment: Report
This coursework contributes 30% to the overall module mark.
23 February 2021
Date & Time Due:
31 March 2021
Your marked coursework and feedback will be available to you on or before: If for any reason this is not forthcoming by the due date your module leader will let you know why and when it can be expected. The Head of Studies should be informed of any issues relating to the return of marked coursework and feedback.
28 April 2021
When completed you are required to submit your coursework to: All completed coursework must be sent to the module leader electronically using the Blackboard VLE ‘Turnitin’ facility on the relevant shell. Work submitted by other means will not be accepted.
Late submission of coursework policy: Late submissions will be processed in accordance with current University regulations, which state: “The time period during which a student may submit a piece of work late without authorisation and have the work capped at 50% if passed is 14 calendar days. Work submitted unauthorised more than 14 calendar days after the original submission date will receive a mark of 0%. These regulations apply to a student’s first attempt at coursework. Work submitted late without authorisation which constitutes reassessment of a previously failed piece of coursework will always receive a mark of 0%.”
Academic Offences and Bad Academic Practices: These include plagiarism, cheating, collusion, copying work and reuse of your own work, poor referencing or the passing off of somebody else’s ideas as your own. If you are in any doubt about what constitutes an academic offence or bad academic practice you must check with your tutor. Further information and details of how DSU can support you, if needed, is available at: http://www.dmu.ac.uk/dmu-students/the-student-gateway/academic-support-office/academic-offences.aspx and http://www.dmu.ac.uk/dmu-students/the-student-gateway/academic-support-office/bad-academic-practice.aspx
How the work will be marked: To achieve a ‘Distinction’ mark of 90 – 100%, the work must demonstrate an exceptional ability and insight, indicating the highest level of technical competence. It must have the potential to influence the forefront of the subject, it may be of publishable quality and it must demonstrate relevant generic skills at the highest possible standard. To achieve a ‘Distinction’ mark of 80 – 89%, the work must demonstrate an outstanding ability and insight based on authoritative subject knowledge and a very high level of technical competence. It must be considered to be close to the forefront of the subject, it may be close to publishable quality and it must demonstrate relevant generic skills at a very high level. To achieve a ‘Distinction’ mark of 70 – 79%, the work must demonstrate authoritative, current subject knowledge and a high level of technical competence. It must be accurate and extensively supported by appropriate evidence, it may show some originality with clear evidence of capacity to reflect critically and deal with ambiguity in the data, and it must demonstrate relevant generic skills at a high level. To achieve a ‘Merit’ mark of 60 – 69%, the work must demonstrate a sound, current subject knowledge it must contain no significant errors in the application of concepts or appropriate techniques but it may contain some minor flaws. It must be well developed and coherent, it may show some originality and clear evidence of capacity to reflect critically and it must demonstrate relevant generic skills at a good level. To achieve a ‘Pass’ mark of 50 – 59%, the work demonstrates satisfactory subject knowledge, with some evident weaknesses; possibly shown by conceptual gaps, or limited use of appropriate techniques. The work is generally sound but tends toward the factual or derivative, with limited evidence of capacity to reflect critically. The work must demonstrate relevant generic skills at a satisfactory level. A ‘Fail’ a mark of 40 – 49% indicates that the work demonstrates limited core subject knowledge and contains some important weaknesses; possibly shown by factual errors, conceptual gaps, or limited use of appropriate techniques. The work lacks sound development; it provides little evidence of capacity to reflect critically and demonstrates a quality of the relevant generic skills that do not meet the requirements of the task. A ‘Fail’ a mark of <30 indicates that the work demonstrates inadequate subject knowledge. It lacks coherence and evidence of capacity to reflect critically and demonstrates a quality of relevant generic skills that do not meet the requirements of the task.
You are a Consultant at a reputable De Montfort University spin-off company that specialises in renewable energy solutions. Your client is a multinational property developer on the verge of moving into the UK property market. They are looking to build an estate of 50 new 3-bedroom homes, each for a family of two adults and two children. Each home is gable-roofed with each side of the roof being an 8m by 4m rectangle. Your client has no specific location in mind but is looking to meet all or part of the estate’s electricity needs through photovoltaic energy generation, if economically viable.
Based on photovoltaic energy generation potential alone, choose a suitable location (longitude and latitude) for the estate. Using an appropriately annotated map, justify your choice.
Using the “Load Analysis” sheet of PvSA (the Photovoltaic (PV) system modelling tool developed for this course) and the household appliance power ratings published by the Centre for Sustainable Energy (CSE) (available at: https://www.cse.org.uk/advice/advice-and-support/how-much-electricity-am-i-using), develop the summer and winter load profiles for one home. You should select between 5 and 15 appliances from the list provided by CSE, for an annual demand in the range 3000 – 4300 kWh. You can adopt a realistic consumption profile of your choice and assume the summer and winter consumption profiles are similar to the autumn and spring consumption profiles, respectively. Provide the following in your report:
Your final summer and winter load tables.
The seasonal load summary table, showing the average daily daytime and night-time consumption and peak load for each season, as calculated by PvSA.
The annual load summary table, showing the average daily consumption and peak load.
Summary plots for the average daily consumption and peak load.
For the home in Task 2, design the most economical rooftop PV system that covers both sides of the roof of the house and assess its economic viability for a 30-year period. You can use the optimal azimuth angle for the location but the slope is restricted to the range . Assuming a grid-connected system on a grid electricity tariff of 15 p/kWh and an annual tariff inflation rate of 2.6%:
Is your proposed investment financially viable?
How much of the home’s electricity demand is met by the system?
What are the maximum and actual capacity factors of the system?
How much CO2 is saved annually? Use the average carbon intensity in December 2020 for your chosen location and assume that the carbon intensity of electricity generated from PV systems is 85 gCO2/kWh. The carbon intensity of grid electricity consumed from any region of the UK can be obtained from the Carbon Intensity API.
This task would require you to use all the sheets of the Workbook but the “PPA Analysis” sheet.
As an alternative to rooftop solar, design and analyse a single solar farm that is capable of satisfying 10% of the estate’s total electricity demand over a 30-year period; determining its total investment cost, net present value, and total customer savings over this period. For the purpose of this assessment, the solar farm is installed on a nearby level field, and, therefore could be of an orientation of your choice. The solar farm is operated by an Independent Power Producer (IPP). Therefore, when selecting the slope and azimuth angles for your system, do bear in mind that the goal of an IPP is profit maximization. Repeat your analysis for 20%, 30%, 40% up to 100% of the total estate demand and plot the graphs of total investment, net present value, and total customer savings over the 30-year period versus the percentage of estate demand satisfied. Proffer a suitable explanation for the trend portrayed by these graphs. Assume the following:
The Power Purchasing Agreement (PPA) between the estate and the IPP is such that if the IPP cannot satisfy the demand it is contracted to supply, it pays a penalty that is the difference between the PPA tariff and the grid electricity tariff for each kWh not supplied.
The same demand profile for all 50 homes on the estate.
The IPP charges the estate 12.75 p/kWh consumed, increasing by 1.5% annually.
By considering the demand side, discuss how the consumption profile of the estate can be modified to further reduce the cost of the system you designed in Task 3, without reducing its total annual energy demand.
Based on your findings in Tasks 3 and 4, suggest the most economical option to power the estate.
Prepare an assessment report for your client outlining your findings. Your report should clearly and logically summarise the outcomes of Tasks 1 to 6 with sufficient information to justify your findings and recommendations. Also detail the steps, as well as any assumptions used to obtain these findings, in order to allow your client to assess their appropriateness. Note that the spreadsheet itself cannot be submitted; all Information must be in the report.
Use PvSA, the PV system modelling tool developed for this course, to design and analyse your systems. Use the rates provided in Table 1 and the current Feed-In Tariff rates published by Ofgem. For PV module, inverter, and battery costs, see the “Material Cost” sheet of PvSA. Assume the following:
A one-off installation cost of £600/kW of installed PV capacity, an annual O&M cost of 6p/W of PV capacity, and an annual battery storage maintenance cost of £50/kWh of storage.
All investments are initially funded through a loan spread over the life of the project.
2% cable losses and no near shading.
Table 1: Miscellaneous rates
Goods and Services Inflation
Real Discount Rate
Interest on Savings
Cost of Borrowing
It is impossible for any two systems to have the same coordinates and load profiles, and therefore, the same techno-economic indicators. Any two systems deemed to be the same will be flagged as an Academic Practice Offense.
The report must not be longer than 1500 words in total, including the title page and references, and there should be no appendices. Use a style appropriate to a technical report (i.e. formal, factual and to the point). Use portrait A4 format with a single columnandinclude page numbers in the footer. You should use Calibri or Times New Roman with font of size no less than 11 points. Your report must include the following (including your own headings), in the order depicted:
Title page (include your name, course code, module name, month and year of submission)
Executive summary (150 words max.)
Introduction (250 words max.)
[your chosen headings]
Conclusions (400 words max.)
References (no more than 10 references)
You do not need a table of contents, list of figures, or list of tables. All tables and figures must be numbered as they appear (e.g., Table 1, Table 2, Fig. 1, Fig. 2 etc.) and referred to in the text. It is best to do this in Word using ‘insert caption’ and ‘insert cross reference’ when referring to these in the text, from the References tab. Tables must be editable and not images and the “Conclusions” should summarise your findings and recommendations.
A lot of references are not expected, nor is a literature review, but you should include some to support your arguments, data, and assumptions. These should be reliable sources such as books, reports by respected organisations, and refereed papers. You may cite lessons from the course; give author as DMU. For this assignment do not use commercial sites, blogs, press articles, etc. Use the Harvard (author (year)) or IEEE system [number] for references (in Word you can use Endnotes for IEEE). Advice is available from the DMU library web pages1. You should submit as a PDF file (in Word: Save As PDF). Check the final PDF version for errors, as these occasionally occur in the conversion process. Note that fields are updated when saving to PDF and this can produce unexpected results.
Table 2: Mark Allocation
Learning Outcome Assessed
1 & 5
3 & 4
3 & 4
3 & 4
2, 3, & 5
Report structure and referencing
Logically well-structured, concise, and relevant report with appropriate referencing
High quality, relevant, and appropriately labelled Figures and Tables
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