IDP2 Future Hybrid Desalination Facility
Future Hybrid Desalination Facility
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IDP2
Future Hybrid Desalination Facility
The electrical engineer’s assignment 2 challenge specification
1. INTRODUCTION TO ASSIGNMENT 2
For assignment 1 you completed a group challenge to help solve the problem of water security- a concept design for
a future hybrid desalination facility which filters sea water to produce fresh drinking water. Your facility’s concept
design passed the water through several processing stages: intake, pre-treatment (screening and filtration),
desalination (hybrid technologies), post treatment (disinfection), freshwater storage and brine disposal. You also
considered the whole project’s structure and energy efficiency.
In assignment 2 you will work together in groups to produce a discipline-specific detailed design. There are separate
groups for mechanical, electrical, and civil disciplines. Consequently, you will be working with different people. You
will follow the same process as assignment 1: complete the stage-gate process, be assigned an academic mentor,
and divide the work to work on individual subsystems. You’ll come together to discuss common elements between
systems and to develop an overall model. The detailed design will be assessed by assignment 2.
1 DETAIL DESIGN (ASSIGNMENT 2) - ELECTRICAL: “THE BRAIN”
You’re allocated to a new electrical engineers-only group. You’ll probably come from different assignment 1 groups.
As a result, you’ll have worked on a different assignment 1 concept designs. Your first task will be to pick one of
these concept designs that your new group should adopt for everything you do in assignment 2.
Each group member will produce a discipline-specific detail design and contribute to a group presentation. As an
electrical engineer, you’ll consider simulation of the energy use of the facility– how energy is converted and
controlled in the system. You’ll take the chosen assignment 1 concept design and develop a “digital twin”.
Civil engineers provide expertise in building. Mechanical engineers are experts in designing physical assets. You’ll
provide expertise to power and control loads in throughout the facility by supplying voltages and currents. Your
simulations should focus on matching the power source input(s) to the output(s).
Each person should focus on one part of the facility. A guiding design principle for your individual system and the
overall system is to make it as realistic as possible and maximise energy efficiency. To encourage creativity, many of
the design requirements are open-ended. Table 1 summarises the task
System Requirements Assignment 2
Whole energy system and
structure - All people
Summary of the electrical system covering
all subsystems below. Summary of the
overall power budget and efficiencies.
Presentation: A high-level description of the facility’s
electrical system. This should identify each individual
subsystem and highlight common elements. You should
include a summary of the facility’s overall power budget,
and an exterior CAD render adopted and enhanced from
assignment 1.
Water intake (abstraction)
1 person
Power and control of the system.
Handle system inputs which may include
matter, energy and information flows as
identified from assignment 1 functional flow
analyses.
Control energy supply to match energy
consumption.
Report: A description of your design. The simscape model
should include the power source, converter and model
the load. Control elements of the model should be
implemented in the simulink domain. You should report
average energy efficiency of your simulation in normal
use.
Pre-Treatment Process
(screening and filtration)= 1
person
Desalination Process
(hybrid technologies) - 2 persons
Lighting - 1 person
Environment (temperature,
heating & humidity)
1 person
Table 1 Summary of electrical work.
IDP2 Challenge 2022/23: Future Hybrid Desalination Facility March 2023
2
The number of people in your group will determine who does what:
• 6 people: Complete all work and 2 desalination processes.
• 5 people: Complete all work and 1 desalination process.
• 4 people: Omit environment
• 3 people: Omit lighting.
Groups of 3 people or lower may be disbanded/merged with other groups depending on the time remaining.
2 MODEL BASED DESIGN
To create your discipline-specific digital twin, you’’ll tackle your
challenge by developing Model-Based Design (MBD) approach.
MBD requires modelling and simulation of the structure as a cyber-
physical system.
Your model defines and observes system inputs and outputs. By
specifying these, you can experiment with electrical circuits to
supply power to empirically determine model parameters such as
component values like resistance, capacitance, inductance, voltages
and currents- a “what-if Analysis”. As your confidence grows you
can add more realistic details to it.
Modelling and simulation is conducted in Simscape which is
part of the Matlab/Simulink environment. It’s an industry
standard tool enabling you to build cyber-physical systems
considering multiple physical domains. Although you’’ll focus
on one physical domain – electrical - you might consider other
physical domains such as mechanical (rotation or translation),
thermal, magnetic, gas and hydraulic. To be a competent
electrical engineer, gaining an appreciation other physical
domain is a must; in the real world an electrical system always coexists with other physical domains.
Digital twin development can facilitate detailed virtual prototypes, generating detailed design and
implementation/fabrication plans, and helping with maintenance. This is part of the industry 4.0 revolution.