Product Reverse

Design & Analysis

Of
Heat Sink

Submitted by
Group – 22
Tanya Jaijran B22332
(Branch: Mechanical)
Sweta Rajput B22331
(Branch: Mechanical)
Harman Kaur B22207
(Branch: Electrical)
14. Sustainable matrices (at least 4 pages with all calculations and graphs) w.r.t
Materials, Production, Use, End-of-life and Conclusions).

Sustainable metrics mean metrics for measuring sustainable product design concepts.
Four metrics have been proposed based on studies on sustainable design.
• Material
• Production
• Use
• End of Life
These metrics are described below. However, at the conceptual design stage, it is hard to
know the actual value of the negative environmental impacts. Therefore, the level of
sustainability in a simpler way of measurements has been determined on the scales of 0,1
and 2 i.e. low, medium, and high respectively to explain the different attributes.
1) Material
The below table attributes to consider for material sustainability and provides a brief
explanation for decision-making after that equation is developed to overall evaluate
the material sustainability.

Attribute Symbol Low (0) Medium (1) High (2)

Material M1 Renewable
Origin Non-renewable Hybrid
Material M2 Toxic, neither Either toxic or Nontoxic, can
Property recyclable nor nontoxic, either be easily
biodegradable recyclable or reused or
biodegradable recycled
Use of M3 Poor potential Fair potential Good potential
Material for material for material for material
quantity quantity quantity
reduction reduction reduction

Material quantity means weight/volume of materials

where i is ith material and N is a number of material types.

 According to the above table evaluation of our product is as follows.
Our product contains mainly (N=2) materials namely ABS (Acrylonitrile Butadiene
Styrene), and DC brushless motor materials.
ABS (Acrylonitrile Butadiene Styrene)
M1 = 0 (Non-renewable nature of this substance stems from its derivation from
petrochemical sources.)
M2 = 2 (Material is both recyclable and non-toxic.)
M3 = 0 (Material Cannot be reduced since the overall design is optimized according to
the fan blade shape and an overall covering is given to protect the product from the
external environment.)
DC Brushless Motor
M1 = 0 (non-renewable)
M2 = 2 (Recyclable and Non-Toxic)
M3 = 2 (Good potential for material quantity reduction)
Putting the values in the above equation.
Metric Material = {{9 x [ (0+2) x 0 + (0+2) x 2]/2/8} + 1
= 3.25

2) Production (Manufacturing and Assembly) (Based on subjective

judgment)

Attributes for measuring concept production sustainability

Attribute Symbol Low (0) Medium (1) High (2)
P1 Poor balance (e.g., Fair balance Good balance (e.g.,
The balance contains too many (e.g., contains contains few simple
between the parts or too few parts but is parts)
number of complicated parts) complicated)
parts and the
complexity
P2 The concept The concept has The concept can
Parts requires a a reasonable benefit significantly
Standardisation considerable degree degree of by using standardized
of customization potential to be components
standardized

P3 Poor potential for Fair potential Good potential for

Parts Design assembly for assembly assembly
for Assembly optimization optimization optimization
 P4 Excessive Partial No excessive
Suitable operations needed excessive operations needed
Fabrication (e.g., polishing, fine operations
Method machining) needed

P1 = 2 (simple parts and less complications in assembly and disassembly)

P2 = 1 (Parts require customization, only motor can be standardized)
P3 = 0 (Less potential of assembly optimization since overall assembly is simple)
P4 = 2 (no excessive operations)
Metric Production = {[9 x (2 x 1 + 0) x 2]/12} + 1
=4
3. Use
Attributes for measuring concept use sustainability

Attribute Symbol Low (0) Medium (1) High (2)

Product use U1 Product Product Product lifetime
time/lifetime lifetime is lifetime is fairly is almost
significantly shorter/longer identical to
shorter/longer than product use product use time.
than product time.
use time.
Energy U2 The concept us The concept The concept
consumption the significantly consumes a fair consumes a slight
during use amount of amount of energy amount of energy
energy
Robustness, U3 The concept The concept The concept
reliability, requires consumes a fair consumes a slight
and significantly number of number of
maintenance. number of resources to resources to
resources to maintain/ service. maintain/ service.
maintain/
service.
 U1 = 2 (Product lifetime is typically designed to be almost identical to product use
time.)
U2 = 2 (Brushless heat sinks generally consume a slight amount of energy during
use.)
U3 = 1 (While they may not require significant resources, they may s5ll need
some maintenance or service, depending on usage condi5ons and environment.)

Metricuse = ({9x2(2+1)}/ 8) +1
=7.75

4. End of life

Attributes for measuring concept End of life sustainability

Attribute Symbol Low (0) Medium (1) High (2)

Reuse E1 Poor potential for Fair potential Good potential

reuse for reuse for reuse

Recycling, E2 Poor potential or Fair potential Good potential

remanufacturing recycling and for recycling for recycling and
and repair remanufacturing and remanufacturing
manufacturing.

Disposal E3 Significant Moderate Little impact due

impact due to impact due to to disposal
disposal disposal
Ease of E4 Poor potential for Fair potential Good potential
disassembly disassembly for for disassembly
optimisation disassembly optimisation
optimisation
 E1 = Medium (1) - There may be some potential for reuse, depending on the
condition and design of the heat sink
E2 = High (2) - These heat sinks typically consist of materials that can be recycled
or remanufactured.
E3 = High (2) - Heat sinks usually have little impact on disposal if properly
recycled.
E4 = Medium (1) - Disassembly may require some effort but can generally be
achieved with moderate ease.

MetricEOL= ({9x (5)x(1)}/ 12) +1 = 4.75

Conclusion:
A summary of metrics is
depicted below. These
four metrics could be
used to measure the
specific aspects of a
design’s sustainability.
The equations mentioned
above depict the degree
of sustainability from
poor (1) to excellent (10).
Our product scored 3.25 in material metric, 4 in production, 7.75 in Use, and 4.75
in End of Life with an average sustainability score of 4.9375 depicting that our
product concept sustainability is approximately 50 %.

An overview of product sustainability assessment results is also shown below.

Assesment Result
9

0
Material Production Use End Of Life
Result 3.25 4 7.75 4.75

The importance of sustainability has become a crucial consideration in modern

product design and development. There is a growing awareness that many
negative environmental impacts result from decisions made in the early stages of
design, especially during the conceptualization phase.