UWE Bristol Engineering showcase 2015

Jack Mitchell
Mechanical Engineering - MEng
Project Supervisor:
Dr. Rohitha Weerasinghe
“An investigation into the conceptual design of a semi-automated, commercially
Fueling system design
The delivery of fuel was required to be automated and perpetual in
order to remove human input. An Archimedes screw was implemented
for this use. The following equations were used to determine key design
parameters
1 VV tt = 2ππ2 3
RR oo
wwhwwwwww KK
KK
= tan θθ aaaaaa, VV tt iiii tthww vvvvvvvvvvvv oooo eeeeeeh bbbbbbbbbbbb
2 Ʌ = 2ππRR 0λλ
KK
3 ρρ = RR ii
RR 0
4 αα = tan −1 RR 02ππ
Ʌ
5 ββ = tan −1 RR ii2ππ
Ʌ
viable, food smoking unit”
Required Insulation Thickness
To determine the required thickness
of insulation between the inner and
outer shell the following equation
was used;
xx = kk h ∙ TT ∞ − TT ss
TT ss − TT aaaaaa
The insulation is shown installed
below.
Final Design
The final render of the design is
shown below, incorporating all the
years work into one assembly.
Project summary
This project investigates the design of a food
smoker, with a detailed analysis of existing
research and journals to provide a basis of
initial research. Comparisons are made to
build knowledge and support investigations,
in order to produce a specification. Concept
designs were created and developed,
resulting in a final design. Use of further,
supporting, research aided in the design
process and allowed the calculation of
required geometries for the chosen design.
CAD modelling was used throughout the
design process to graphically represent the
work. A simulation package (Abaqus CAE) was
used in the final parts of the report to analyse
thermal efficiency within parts of the system.
Project Objectives
• Research into viable methodology for reduction of PAH
emissions during pyrolysis
• To produce a product that will operate without human
input for up to 10 hours
• Design of an automated fueling system
• Conduct thermal analysis simulations
Display of temperature distribution across pyrolysis plate
All temperatures in
Kelvin
Graph showing required cycle times for two different plate thicknesses
Project Conclusion
The use of automated systems allows the complete
removal of user input, simplifying a process that would
otherwise require constant attention in an industry where
time is a valuable commodity.
User safety and end product quality have been a
consistent motivation during the design process; leading
to the implementation of systems such as radiant heating
(to reduce PAH emission), smoke intensity controls (to
vary smoke deposition and eventual end product flavour),
as well as adherence to relevant British standards
necessary to maintain a product suitable for use in a
commercial/industrial environment. Work conducted in
the first year of the project has provided a solid basis to
work from in the second year, giving rise to suggestions for
further research and design requirements.