Assignment 36
Sheet1
| Mass of water and jugg | 12 | Mass of water 842g | ||||||||||||||||||||||||
| Initial temperature | 22.1 | |||||||||||||||||||||||||
| Time (minutes) | Temperature | |||||||||||||||||||||||||
| 0 | 81.7 | |||||||||||||||||||||||||
| 3 | 77.3 | |||||||||||||||||||||||||
| 6 | 74. | 9 | ||||||||||||||||||||||||
| 72.7 | ||||||||||||||||||||||||||
| 70.8 | ||||||||||||||||||||||||||
| 15 | 68.9 | |||||||||||||||||||||||||
| 18 | 67.1 | |||||||||||||||||||||||||
| 21 | 65.4 | |||||||||||||||||||||||||
| 24 | 63.9 | |||||||||||||||||||||||||
| 27 | 62.4 | |||||||||||||||||||||||||
| 30 | 61 |
Temperature (C)
Temperature
0 3 6 9 12 15 18 21 24 27 30 81.7 77.3 74.900000000000006 72.7 70.8 68.900000000000006 67.099999999999994 65.400000000000006 63.9 62.4 61
-7 –
4 Results and Analysis
Table 1 (Hot water cooling over time)
Time (mins) Water Temperature (degrees)
0 79.1
1 76.5
2 74.8
3 73.6
4 72.5
5 71.8
6 70.9
7 70.2
8 69.3
9 68.7
10 68
11 67.3
12 66.6
13 65.9
14 65.2
15 64.5
16 63.9
17 63.2
18 62.7
19 62.1
20 61.5
21 60.9
22 60.3
23 59.8
24 59.3
25 58.8
26 58.3
27 57.8
28 57.3
29 56.9
30 56.4
jonnypotts
Pencil
-4 –
Figure 6, graph of plotted results with linear trendline
Table 2, Results of coffee machine
experiment
4 Results and Analysis
Results of 6 cups:
At 0 min is the initial temperature of the hot water.
This was taken as soon as the machine had heated
up all the water and drained it into the coffee pot
(Table 1).
Table 1, Mass of equipment used
Mass of water was deduced by (Table 2):
Mass of full coffee pot – Mass of empty coffee pot =
mass of water (𝑚)
– 6 –
4 Results and Analysis
Table 1 (Time and temperature recordings)
Graph 1 (Relationship between Temperature and Time
jonnypotts
Pencil
– 6 –
4 Results and Analysis
Our raw recorded results for the cooling of the water are shown in
Fig.5
and the
relevant ones are shown graphically in Fig.6.
y = -0.0107x + 63.082
R² = 0.8903
0
10
20
30
40
50
60
70
80
0 200 400 600 800 1000 1200 1400 1600 1800 2000
Te
m
p
(°
C
)
Time (s)
Fig.6
Fig.5
jonnypotts
Pencil
Department of
Engineering and
Mathematics
Assignment
Specification
01 October 2020
Session: 2020-21
Module: 55-403200
Module Leader: Dr Jonny Potts
Assignment number/title: Coffee Machine Design
Academic contact for guidance: Dr Jonny Potts, j.r.potts@shu.ac.uk
Maximum word count or number of pages: 2,000 words
Percentage contribution to overall module mark: 50 %
Deadline for submission: 3pm GMT Thursday, 17 December 2020
Method and Location for Submission: Blackboard submission plus Turnitin
Deadline for return of feedback: Thursday, 14 January 2021
Module learning outcomes to be assessed:
• Identify the operating principles and key physical mechanisms which govern and limit the
performance of thermal and fluid systems
• Apply analytical and experimental investigation to characterise the performance of thermal
and fluid systems
References/recommended reading:
Primary Module Text:
Fundamentals of Thermal-Fluid Sciences by Cengel, Cimbala and Turner
Alternative Technical Sources (not an exhaustive list):
A range of texts are provided on the Resource List Online; available under Support Resources on the
module Blackboard site
Please ensure that all sources of information used are referenced. For guidance see:
http://libguides.shu.ac.uk/referencing
All assessments are subject to SHU’s collusion and plaigiarism regulations. Please refer to:
https://students.shu.ac.uk/shuspacecontent/assessment/plagiarism
Writing and Report Production resources:
There are also a wide range of support resources available via the skills centre. The Resources and
Academic Skills areas on their webpage provides specialist help in a number of areas that may help in
producing a high quality report. Studiosity is a free online writing feedback service where you can
submit draft work online and receive comments, feedback and suggestions from an academic writing
expert within 72 hours.
http://libguides.shu.ac.uk/referencing
https://students.shu.ac.uk/shuspacecontent/assessment/plagiarism
https://blogs.shu.ac.uk/thebridge/resources/?doing_wp_cron=1526397695.3702130317687988281250
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Coffee Filter Design Brief
You have learnt a number of principles that can be drawn upon to investigate the
operation of a common household item (that has assisted in many deadlines being met):
the electric coffee filter machine.
Week 17 is coursework week – you will attend a coursework focussed (refer to timetable)
session and will be provided with supplementary online resources dedicated to collating
all the information, support and feedback you need to begin working on your coursework.
You will be provided with a demo of an experiment using a coffee machine and will write a
lab report about it, as if you conducted the experiment yourself, using the provided
template. You will submit the report before end of Week 21 at 3pm Thurs 17 December
(so you have around 4 weeks to complete the work).
Assignment Brief:
• Research and explain the workings of an electric coffee filter machine
• To keep the coffee hot once it is made, calculate using your experimental results:
The power required
The cost of keeping the coffee hot for an appropriate time period
• Discuss the efficiency of the coffee making and/or storing process and suggest
how this may be improved. You should focus on one system element for
improvement and refer to your cost calculation.
What the demonstration will include?
• Experimental procedure overview and the experiment itself, as explained on the
EXPERIMENT Information Sheet
• A number of excel spreadsheet data sets have been collected and will be uploaded
on the module Blackboard site
Ensure that you…
• Read the REPORTING TEMPLATE and ASSESSMENT GRID
• Understand what is expected from you – ask questions in the scheduled support
sessions
Writing Your Report
Look at the report template and you will see you need to include 3 items:
• Main report (90 %)
• Feedback received from the skills centre on your academic writing, incl evidence of
the reply addressed to you personally. (5 %)
• Completed report checklist (5 %)
These are explained in more detail on the report template.
How will I be assessed and what feedback will I receive?
Drop in sessions are provided to ask questions about your work before submission.
An ASSESSMENT GRID is provided to explain how you will be marked, appended.
Your work will be marked online through Blackboard using this assessment grid.
You will be invited to receive personal feedback with a member of staff about your report.
Experiment Information Sheet
Heat up the water through the coffee machine and record the temperature of the water
in the coffee pot as it cools down. Experimental data sets correspond to different
quantities of water: 2, 4, 6, 8 or 10 cups.
Data you need to obtain (from data sets on Blackboard):
• The temperature of the water in the jug as it varies with time.
• The mass, m (kg) of water used
Equipment Available:
• Working fluid: water
• Coffee filter machine
• Stopwatch/ Phone (+/- ? s)
• Thermocouple and Temperature Data Logger (+/- ? °C)
• Mass balance (+/- ? g)
• Laptop
Procedure:
1. Select and determine the mass of water you require using the cup lines on the
coffee machine jug and the mass balance
2. Pour the water into the water reservoir of the coffee machine
3. Turn on the coffee machine.
4. Note down observations about the operation of the machine, as this might help
with the final section of the assignment.
5. Once the original quantity of water is back in the jug, remove the jug from the
machine and place it on the table.
6. Take the temperature of the water immediately, and then at regular intervals as
the water cools, for a period of 30 minutes.
7. Enter the collected data into Excel and plot a graph of Temperature vs Time
8. Determine the value of
∆𝑇
∆𝑡
assuming that the relationship is linear.
Hint – create a trend line, and read the gradient.
DO NOT JUST USE THE FIRST AND LAST TEMPERATURE READINGS TO CREATE YOUR
TREND LINE – consider why you need to use all of the collected data.
9. Discuss and write down how the fundamental principles of this experiment relate
to your course.
Appendix – Assessment Criteria: Coffee Filter Design [Weighting 50% Overall]
Introduction 20
%
VH H M L H M L H M L H M L H M L VL 0
Equipment/Procedure 10%
VH H M L H M L H M L H M L H M L VL 0
Results/Analysis 25%
VH H M L H M L H M L H M L H M L VL 0
Discussion 25%
VH H M L H M L H M L H M L H M L VL 0
Presentation 5%
VH H M L H M L H M L H M L H M L VL 0
References 5%
VH H M L H M L H M L H M L H M L VL 0
Feedback on Writing 5%
incomplete
or missing
Report Checklist 5%
incomplete
or missing
Criterion:
Weighting:
%
Processes involved are outlined
and explained thoroughly, with
reference made to thermofluid
principles.
Section includes an appropriate
introduction, indicating the
nature of the data to follow.
Good presentation of data in the
appropriate formats. Correct
units used in all cases. Data
thoroughly explained and
analysed in depth. Running cost
estimation well-presented and
justified. Sample calculations
included.
Very good described equipment
details and instruments used. A
thorough description of the
experimental procedure
provided.
UPPER SECOND (69 to 60%)
Authoritative account of underlying
principles of system supported by
reputable sources.
Full account of all equipment and
instruments used in the experiment,
taking account of precision of
instrumentation. A thorough account of
experimental procedure given in clear
prose.
Clear and concise introduction along
with high quality and correct
representation of results presented in
appropriate format. Thorough treatment
of raw data used to examine the
relationship between the measured
parameters. Sample calculations
included in thorough, well considered
analysis.
Running cost estimation
sensible and considered in the wider
context. Results of all analysis quoted to
appropriate level of precision.
FIRST (100 to 70%)
Section includes an appropriate
introduction, indicating the
nature of the data to follow.
Good presentation of the data in
the appropriate formats.
Inconsistencies with units may be
evident. Brief attempt at
explanation of data with
accurate analysis carrie out.
Running cost estimation
sensible. Sample calculations
may be missing.
Introduction to data presented
not clear. Tabulation /
presentation of results poor or
difficult to interpret. May be
errors in units and
inconsistencies found in results.
Analysis carried out meets the
fundamental aims of the task
and may contain inaccuracies –
no attempt to look beyond the
basic requirements.
Concepts poorly understood. Incorrect
explanation of one or more processes given.
Evidence of research limited.
Little or no consideration given to the nature
of the equipment in terms of either
capability or precision. Outline of the
procedure given as a list of instructions.
No introduction to results section.
Incomplete or unnecessary data. Units
incorrect or missing. No evidence on
treatment of raw data. Incorrect and or
invalid results. Incomplete analysis of data.
Processes involved are outlined
accurately, albeit with some
information missing.
Satisfactory account of the
concepts and principles involved.
Some evidence of background
research.
A good description of the
equipment listed with sufficient
details for the reader to
understand the experimental
configuration. Experimental
procedure presented in prose but
containing omissions or
ambiguity.
Equipment listed with
insufficient detail for the reader
to understand the experimental
configuration. Experimental
procedure presented in prose but
containing omissions or
ambiguity.
LOWER SECOND (59 to 50%) THIRD (49 to 40%) INSUFFICIENT (39 to 1%) ZERO
Report formatted in a professional
manner with excellent standard of
English. All figures, tables and equations
numbered, captioned where appropriate,
and referred to in the text. Figures
formatted clearly and consistantly.
High standard of presentation
and English with consistent
formatting. All figures, tables
and equations numbered and
captioned where appropriate.
Consistant format of report with
all figures and tables numbered,
captions may be missing. Report
may slip into 1st person
narrative on occasion, good
spelling and standard of English
with only the odd error.
Report of an acceptable
standard. Document formatting
results in poor appearance.
Lacks a number of basic
requirements e.g. captions and
numbers for figures/tables. Some
errors in English.
Little consideration given to formatting
and/or continuity. Very poor standard of
English with a number of typographic errors.
Addresses results and analysis with
outstanding level of detail such as
relationship between model and
experiments. Addresses inconsistencies,
accuracy of measurement and model,
improvement suggested with possible
enhancement of numerical model.
Efficiency of current process well
considered. Recommendation for
efficiency improvement set in context of
experimental results and system analysis.
Some numerical analysis of improvement
shown, ideally with reference made to
earlier cost calculation.
Addresses results and analysis in
terms of the accuracy of the
measurements and numerical
models and the relevance of the
relationships identified.
Clear, justified proposal put
forward for improvement to
system efficiency with some level
of quantification.
Addresses results and analysis in
terms of the accuracy of the
measurements and the relevance
of the relationships identified.
Clear, justified proposal put
forward for improvement to
system efficiency.
Results and analysis considered.
Little in-depth treatment of the
outcome of the analysis or the
quality of the raw data. A
fundamental suggestion for
efficiency improvement, albeit
without effective justification.
Little effort made to expand on the previous
sections. Efficiency improvements, if present,
lack justification.
100 if complete
100 if complete
References used to good effect and clearly
cited, using primary sources, in correct
order using SHU
standard.
References clearly cited,
formatted to SHU approved
standard.
References included in non-
standard format.
Inadequate referencing.
Citations included as
bibliography.
References Missing.