### Recent Question/Assignment

MIET1081 - Investigative Portfolio Assignment
Sem 1, 2020
InstRuctions
– Choose one of the assignments/reports below to investigate
– This is an individual assignment examining your knowledge of heat transfer and looking for your original and thoughtful solution. ‘Turn-it-In’ will be used to assist on the originality of the submission. There will be a zero tolerance of plagiarism and you are responsibile for your actions.
– The assignment is worth 35% and is due Friday 5th June. Submit a Report, and PPT slides summarising the project
– Instructions is a template of the assignment with a rubric to guide your work is given
RepoRt 1: Optimized window spacings
Write a computer program to determine the optimized spacing between the two glasses of a double-pane window. The analysis should evaluate the recommended practical value of the spacing (relative to buildings) to minimize the heat losses and list it when the size of the window (the height and the width) and the temperatures of the glasses are specified. Evaluate and discuss the influence of spacing medium which can be filled with dry air, a gas, or a vacuum. Obtain different operating conditions from different environments. This can include day/night and/or winter and summer conditions. It is expected that you use skills in programming in any of the following tools: Matlab, Python, Mathematica, (or Excel if you need to). Show all calculations that were used to justify your decisions and results. This includes, any conduction, convection, and radiation heat transfer modes (including solar heat gain) that occur. Submissions: Report, PPT Heat transfer through a window. summary
RepoRt 2: DeteRmining heat tRansfeR of cans
(Requires 1x thermometer, 1x canned drink)
Bottles can be placed into fridges horizontally or vertically, but which orientation would produce the most rapid heat transfer? In this project you will measure the heat transfer from a can. To perform this test you will look at a cold can heating up. Leave a canned drink in the fridge overnight to ensure uniform temperature of the fluid. The next day, measure the ambient temperature with your thermometer, and obtain any other relevant fluid property from Bureau of Meterology for the day. Take the can out of the fridge, open it up and place a thermometer in the can to measure the inner liquid temperature. Measure the heating effect by taking temperature values every 2min. You only need to do this for an upright vertically standing can. Compare your results with calculations, and discuss any
discrepancies. Using equations, analyse the scenario if the can was horizontal, and compare the results. In your calculations determine the conduction through the cylindrical can, and Heat transfer from an upright vertical can.
the combined convection and radiation heat transfer coefficient. Submissions: Report, PPT summary
RepoRt 3: Design of undeRgRound flooR heating
A house with 200-m2 floor space is heated with geothermal water flowing through pipes laid in the ground under the floor. The walls of the house are 4 m high, and there are 8 single-paned windows in the house that are 1.2 m wide and 1.8 m high. The house has R-
4 insulation (where R = 1/U is the overall unit thermal resistance (the R-value) and U is the overall heat transfer coefficient) in the walls and R-5 on the ceiling. The floor temperature is not to exceed 40?C. Hot geothermal water is available at 90?C, and the inner and outer diameter of the pipes to be used are 2.4 cm and 3.0 cm. Analyse and Pipes placed for underfloor heating.
design such a heating system for this house in your area. Determine the environmental conditions in your area from weather data such Bureau of Meterology to determine your design. The analysis should include: forced convection through pipes; convection and radiation heat transfer from the floor surface; heat loss through the windows and; costs of the insulation, energy consumption of a pump that needs to move the water through the pipes. Submissions: Report, PPT summary
SUBMISSION INSTRUCTIONS
1 IntRoduction [20 maRKs]
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0 4 8 12 16 20

Introduce the problem, outline the method, which cases you are investigating, how your report is structured, and how you will present the results. A literature review should be included which relates the theory to the problem. Problem statement and purpose of the research (e.g. significance of the work) is given in this section.Heat transfer theory learnt in class related to the work. (3-6 pages)
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0 4 8 12 16 20

2 Method [20 maRKs]
Describe the setup and methodologies used. Relevant pictures and diagrams to communicate the method. Discuss the relevant theory to justify the setup. Discuss the correct engineering design and controls that were used to minimise error and ensure reliable data. (3-6 pages).
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0 4 8 12 16 20

3 Results [20 maRKs]
Present your results in a meaningful way through correct choice of figures and plots. Both qualitative and quantitative results should be provided. Explanations of the results are clear and allow the reader to understand the results. (5-10 pages).
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0 7 14 21 28 35

4 Discussion [15 maRKs]
Critically analyse and discuss the results, e.g. What were the causes for the results you saw? Why did the results occur the way they did? Explain this in terms of the heat transfer physics. Relate the results back to some of the discussion points made in the Introduction. Supporting theory should be given. (3-6 pages)
5 Conclusion [5 maRKs]
Summarise your key findings, and learnings from this work. For example, this could be what you learned about the heat transfer. (1 page)
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0 1 2 3 4 5

RepoRt stRuctuRe, styling [5 MaRKs]
Professional report presentation, structure, accuracy (no errors),captioning, referencing, quality of images, layout (whitespacing)…. etc
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0 1 2 3 4 5

Slides/PResentations [15 MaRKs]
Provide 5-8 slide summary to promote and sell your work. This slide is aimed at your presentation skills (although you won’t be presenting it), but to communicate your ideas and work in a concise and presentable mode.
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0 2 4 6 8 10