Assingment 03 Solution..
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University of Toronto *
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Course
1715H
Subject
Industrial Engineering
Date
Dec 6, 2023
Type
Pages
4
Uploaded by HARPREETCH
Fall 2023
Page 1
MIE1715H: Life Cycle Engineering
Assignment 03
Student Name: Harpreet Singh
Student Number: 1010646909
Course name: Life Cycle Engineering
Course code: MIE1715 H
Professor: Dr. Payam Rahimi
Teacher Assistant Professor: Sherry-Ann Ram
Department: Mechanical and Industrial Engineering (MIE)
Question 1:
Generate an SLCA Matrix and Target Plot for a typical textbook. The goal is
to assess the environmental impact of the textbook, and the scope of the assessment is
only three stages of life and three environmental concerns.
Use the book characteristics documented in the matrix below for your assessment. Boxes
with ???? means no information is available. Fill up the matrix and target plot in the next
two pages. Explain/justify your decision.
Environmental Concerns
Life Stage
Material Choice
Energy Use
Residue
Manufacture
1.1 Use of only
virgin materials and
toxic printing ink.
1.2 Inefficient
printers
1.3 Bleaching
chemicals
Shipping/Use
2.1 ???????
2.2 Transportation
from remote
manufacturing
location
2.3 Plastic wrap for
packaging
Recycling
3.1 non-recyclable
hardcover
3.2 ???????
3.3 Chemicals from
incineration.
8/10
Fall 2023
Page 2
Solution 1:
Environmental Concerns
Life Stage
Material Choice
Energy Use
Residue
Manufacture
0
1
2
Shipping/Use
4
1
3
Recycling
3
1
0
See solution from Professor Rahimi
Fall 2023
Page 3
Justification/decision statements for matrix score:
Manufacturing:
Score (0) for 1.1
: Given textbook characteristic information supports the fact that only
virgin and toxic material is used for manufacturing. This is also clearly stated in guidelines
(2,1) of the manufacturing phase, if the material is toxic the score must be (0) for
environmental concern.
Score (1) for 1.2:
Printing is a crucial part of the textbook manufacturing process.
However, the use of inefficient printing can be highly energy-intensive during
manufacturing, but printing is not only the energy-consuming process in the manufacturing
of textbooks. Thus, it is logical to score (1) for this matrix.
Score (2) for 1.3:
In the manufacturing of textbooks bleaching chemicals are reusable.
However, many textbooks use unbleached papers. Therefore, this matrix can be scored (2)
for an average environmental impact.
Shipping/Use:
Score (4) for 2.1:
As per the SLCA guidelines (4,1) for the use phase of a product.
If
product use and product maintenance require no consumables it can be scored (4). In this
study, our product is a textbook that does not use any consumables during its use and
maintenance phase of life. Thus, it is logical to score it (4).
Score (1) for 2.2:
Transportation from remote locations can be a high-energy-intensive
job. So, this matrix can be scored (1) for this environmental concern.
Score (3) for 2.3:
As per the given information plastic material is used for the packaging
of the product. Thus, it is known to us that plastic can be reused and recycled. However,
there is an opportunity to eliminate packaging. Therefore, this matrix can be scored (3).
Recycling:
Score (3) for 3,1:
Non-recyclable hardcovers of textbooks can impact the environment by
landfill waste. The rest of the textbooks can be recycled easily, on the contrary, hardcovers
are easy to separate. However, they can also be reused for another textbook. Moreover, the
weight of the material used for hardcovers is relatively less. Therefore, this matric can be
scored at (3).
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Fall 2023
Page 4
Score (1) for 3.2:
According to
https://www.recyclingbin.com/
, manufacturing recycled
paper uses only 60% of the energy needed to make paper from new materials. In
addition, every ton of paper recycled can save the energy equivalent of 165 gallons of
gasoline. However, it is also clear from the above statement that recycling paper is energy
intensive. Thus, it is logical to score (1) for this matrix.
Score (0) for 3.3:
Incineration treatment for textbooks produces chemicals into the air
which is harmful to the environment and human health. So, due to this severe cause, this
matrix can be scored (0).