ES050 – Introductory Engineering
Design and Innovation Studio
Schematic Diagrams
in Engineering
Design
Prof. Jon Southen
November 4, 2009
Engineering Graphics
The purpose of graphical depictions, in
whatever form, is to communicate design
ideas
The most suitable way of communicating
should be chosen, and may involve a
number of different methods
The method of communication depends on
what is being designed
Engineering Design Outcomes
Machine
Product
Process
Circuit
Software
Structure
Infrastructure
Working Drawings
Machine,
product,
structure
Prototypes
Machine,
product,
structure
Schematic Diagrams
Process,
circuit,
software, infrastructure
Schematic Diagrams
Sometimes a drawing (CAD) or prototype
is not the most appropriate way to
communicate the details of a particular
design
Many examples exist in all engineering
disciplines
This may be applicable to your MDP
Examples of Schematic Diagrams:
Mechanical Engineering
Fluid power (hydraulic and pneumatic)
schematics
HVAC (Heating, Ventilation and Air
Conditioning) control logic diagram
Etc.
Fluid Power Systems
Pneumatic Cylinder
Schematic Representation
http://www.industrialmuscle.co.uk/images/pneumatic_cylinder.jpg
Pneumatic Spool Valve
Section View
Schematic
representation
4
2
14
12
1
5
14
12
5
4
1
2
3
3
Pneumatic Spool Valve
4
2
14
12
1
5
14
12
5
4
1
2
3
3
Pneumatic Circuit Diagram
4
3
2
1
D
D
C
C
B
B
Sample Drawing:
Fluid Power Diagram
A
A
Hydraulic Lift-Arm
SIZE
FSCM NO
DWG NO
REV
Fluid Power Diagram (US Units)
SCALE
4
3
2
SHEET
1
1 OF 1
A
HVAC Control Logic Diagram
Mag-Lev Demonstration
Device
http://ocw.mit.edu/OcwWeb/Mechanical-Engineering/2-003Spring-2005/StudyMaterials/detail/hardware.htm
Examples of Schematic Diagrams:
Civil Engineering
Site plans and Building layouts
Borehole Logs
Scheduling
Etc.
http://www.uccs.edu/~scieng/floorplan.htm#DesignDevelopment100
Architectural drawing
(perspective view)
http://www.midnightsundrilling.com/rig5.html
http://www.gaea.ca/images/Winlog_E101.jpg
http://www.pcexploration.com/equipment/cme.htm
Point State Park Renovations
Construction Schedule
Pittsburgh, PA
Examples of Schematic Diagrams:
Chemical Engineering
Often, chemical engineering designs are
concerned with processes, rather than products
Block Diagrams
Process Flow Diagrams (PFDs)
Piping and Instrumentation Diagrams (P&IDs)
Equipment Drawings and 3 D models
Plant Layout- 3 D models
http://www.dp.com/plantwise/customers/
Block Diagram
What are the unit operations?
Metal
separation
Solid waste
Glass
separation
Storage
Plastic
separation
Products
separation
Hot
gases
Reactor
Process Flow Diagram
MSW
Gasification
Piping and Instrumentation Diagram
4
3
2
1
V-44
I/P
I-26
I/P
I-28
S-11
I/P
I-30
S-12
V-45
S-13
I/P
I/P
I/P
I-27
I-29
I-31
P-48
D
S-1
I/P
I-4
PT
I-2
S-2
PT
I-3
V-3
V-4
MCC
I-7
S-3
V-5
P-34
P-45
P-41
V-24
P-27
V-7
V-27
E-7
V-6
P-31
P-31
P-47
P-1
P-2
S-14
V-10
PT
I-8
P-6
P-6
V-9
V-1
P-46
V-2
D
P-49
PT
I-9
I/P
I-5
V-41
E-1
E-4
V-32
S-5
I/P
I-15
S-6
MCC
I-17
C
PT
I-12
PT
I-13
V-17
V-20
PT
I-18
I/P
S-15
P35
I-16
V-22
C
PT
I-14
S-7
E-8
V-18
V-21
V-16
P-40
V-16
V-25
V-23
V-46
V-15
P-44
E-2
E-5
V-37
V-33
S-16
S-7
I/P
I-19
I/P
I-20
S-7
P-36
PT
P-43
I-25
B
PT
I-22
MCC
I-21
PT
I-23
V-43
B
V-37
V-49
S-7
V-42
V-41
PT
I-24
P-42
V-45
V-44
V-37
E-9
V-48
V-39
V-47
P-39
V-40
E-6
V-26
E-3
Displayed Text
E-1
E-2
E-3
E-4
E-5
E-6
E-7
E-8
E-9
A
4
Description
Low Pressure Pump
Low Pressure Pump
Low Pressure Pump
Filter
Filter
Filter
High Pressure Pump
High Pressure Pump
High Pressure Pump
P-38
V-38
Equipment List
Manufacturer
V-37
Material Model
Ipsum
Ipsum
Ipsum
Ipsum
Ipsum
Ipsum
Ipsum
Ipsum
Ipsum
3
T5
T5
T5
CS
CS
CS
CT
CT
CT
Z5
Z5
Z5
X5
X5
X5
Y5
Y5
Y5
CONTOSO
A
Piping and Instrumentation Diagram
Pharmaceutical Processing - Water Subsystem
SIZE
FSCM NO
DWG NO
REV
ABC-123
SCALE
2
1:1
SHEET
1
1
1 OF 1
Reactor (Gasifier)
Preliminary sketching
Reactor
Temperature
and pressure
measuring
ports
Solid particles
entry
Distributor
Wind box
Hot gas entry
http://www.dp.com/plantwise/customers/
Detailed
CAD
Models
Clicker Question
All of the following are examples of
schematic diagrams in Chemical
engineering, EXCEPT
Block Diagrams
B. Process Flow Diagrams (PFDs)
C. Piping and Instrumentation Diagrams
(P&IDs)
D. Detailed CAD models
A.
Examples of Schematic Diagrams:
Electrical Engineering
Electrical diagrams
and schematics
Circuit schematics
Logic diagrams
Industrial Control
Systems
http://www.tiscali.co.uk/reference/encyclopaedia/hutchinson/images/c02135.jpg
4
3
2
1
480V
X1
120V
Electrical
Schematic
ON-OFF
LOR
RESET
D
OL
U
L
L
U
D
TR2
TR3
MOTOR
VIB
BLOWER
VIB
WTR
C
C
TR3
PS
R
LOR
LOR
HAND
M
START
SS
OFF
ON-OFF
M
START
REMOTE
RUN
B
B
REMOTE
MODE
W
M
TR1
TR2
PS
S
TR1
A
A
To LOR COIL CIRCUIT
http://www.knightselectric.com/photo-HansenCSW-big.jpg
MSH
M
4
3
2
1
http://www.precisionstrobe.com/jc/fieldmill/Circuit_Sch.jpg
Logic Diagram
http://ssro.ee.uec.ac.jp/lab_tomi/e-lab/h11/8038/4516logic-diagram.jpg
UML (Universal Modeling Language)
Software Engineering
Design and communications
Primarily a specification tool
Class specification
UML (cont.)
Sequence specification
UML Static
Structure
Diagram
Database Schema
Tools for Technical Diagrams and
Schematics
Freehand Sketching
2D drawing programs (e.g. AutoCAD)
Diagramming software (e.g. Microsoft
Visio)
Freehand Sketch
Visio Diagram
Freehand Sketch
Visio Diagram
Word/PowerPoint Diagram
Identify Problem
Generate Alternatives
Evaluate Alternatives
Connectors
Clicker Question
An engineering design is not considered
complete without a CAD model.
True
False
Schematic Diagrams
The most effective means of conveying
key design requirements is the one that
should be chosen
A schematic diagram may be more
appropriate than a CAD model or
multiview sketch (and often is!)
CAD and Graphics Assignment
Assignment found in “Deliverables” section
of webpage (www.eng.uwo.ca/es1050)
10 Individual Marks
Due week of November 16
Will have some time to work on in next
studio, but mostly independent