Engineer Design Process
Thinking like an Engineer …
Scientist vs. Engineer


“Scientists discover the world that exists;
engineers create the world that never was."
~Theodor...
Design Criteria – a principle or a standard by which something is judged;
a RUBRIC with which a product can be graded on
F...
Design Constraints – rules/restrictions of design that cannot be
broken
Factors engineers consider when determining a prod...
Constraint vs. Criteria
 Criteria

are GOALS which must be met in
order to satisfy a challenge
 Constraints are factors ...
More Engineering Terminology …


Brainstorming – an individual/group creativity technique
where people focus on finding s...
Hazardous Air Quality Forces Beijing
Residents Indoors
(ABC News)


http://www.youtube.com/watch?v=mobU0j331DY
Some Technical Definitions


(Particulate) Air Filter - a device composed of stringy
materials which removes solid partic...
Measurements in
micrometers
MERV

Min. particle size

Typical controlled
contaminant [2]

17–20[3]

< 0.3 μm

Virus, carbon dust, sea
salt, smoke

Ele...
“Cleaning the Air”
Indoor Air Filter Design Challenge
 Challenge:

Design an air filter that
filters out the most particu...
Air Filter Design Criteria & Constraints
Criteria:
1. Filter cannot block more than 50% of the air
flow
2. Filter must be ...
Air Filter Testing Apparatus
1. Aerospace Engineering - Aerospace engineers
design, analyze, model, simulate, and test aircraft,
spacecraft, satellites...
3. Biomedical Engineering - This is an
interdisciplinary field combining mechanical,
electrical, and chemical engineering ...
5. Civil Engineering - The design and
construction of buildings, dams, water
treatment and carrying systems, air pollution...
7. Computer Engineering - Computer engineers are
involved in the development of both hardware and
software for computers. ...
10. Mechanical Engineering - Engineers
within this discipline tend to focus on one of
three aspects of mechanical engineer...


http://www.carbodydesign.com/2012/03/the-design-process-at-the-bmwgroup/
Components of an Air Filter
Electrostatic Precipitator


The customized filter is just 1 part of the MinusA2's robust 6-stage air filtration system. Other components include:

...
Cycle 2   engineering design process (hampton & fisk)
Cycle 2   engineering design process (hampton & fisk)
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Cycle 2 engineering design process (hampton & fisk)

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  • MERV = Minimum Efficiency Reporting Value
  • Cycle 2 engineering design process (hampton & fisk)

    1. 1. Engineer Design Process Thinking like an Engineer …
    2. 2. Scientist vs. Engineer  “Scientists discover the world that exists; engineers create the world that never was." ~Theodore Von Karman (aerospace engineer)
    3. 3. Design Criteria – a principle or a standard by which something is judged; a RUBRIC with which a product can be graded on Factors engineers consider when determining a product’s design criteria include:  Customer – (Who is the product intended for?)  Aesthetics – (What will make the product appealing?)  Function – (What functions must this product be able to perform?)  Environment – (Is the manufacturing of this product eco-friendly?)  Quality – (How will I ensure a high-quality product?)  Useability – (How easy is it to use the product? Will a user guide be needed?)  Safety – (How will you make sure the product is safe to use?) http://www.digitaldandt.org/index.php/electronics/design-develop-manufacture/exploring?start=6
    4. 4. Design Constraints – rules/restrictions of design that cannot be broken Factors engineers consider when determining a product’s design constraints:  Economic Concerns – (e.g. cost of materials)  Environmental Concerns – (e.g. pollution)  Sustainability Concerns – (e.g. availability of raw materials)  Legal Concerns – (e.g. patents)  Health & Safety Concerns – (e.g. radioactive waste) http://engineering.missouri.edu/mae/files/realistic_constraints.pdf
    5. 5. Constraint vs. Criteria  Criteria are GOALS which must be met in order to satisfy a challenge  Constraints are factors that LIMIT how you can solve a problem Criteria are what you should do, constraints are what you cannot do
    6. 6. More Engineering Terminology …  Brainstorming – an individual/group creativity technique where people focus on finding solutions to a specific problem by gathering a list of ideas from all group members  Prototype – an early sample or model of a product built to test an idea/design OR to serve as something to be copied or learned from  Tradeoff (Trade-off) - losing one feature of a product in order to gain another feature; (getting an upside for a downside)  Troubleshoot – a systematic approach to problem solving used fix failed products/processes by identifying the source of the problem
    7. 7. Hazardous Air Quality Forces Beijing Residents Indoors (ABC News)  http://www.youtube.com/watch?v=mobU0j331DY
    8. 8. Some Technical Definitions  (Particulate) Air Filter - a device composed of stringy materials which removes solid particulates such as dust, pollen, mold, and bacteria from the air  Atmospheric Particulate Matter (PM) - tiny pieces of solid or liquid matter suspended in the Earth's atmosphere  Micrometer (Micron) – metric unit which is equal to 1×10−6 of a meter or 0.001 mm; expressed as µm
    9. 9. Measurements in micrometers
    10. 10. MERV Min. particle size Typical controlled contaminant [2] 17–20[3] < 0.3 μm Virus, carbon dust, sea salt, smoke Electronics & pharmaceutical manufacturing cleanroom 0.3–1.0 μm Bacteria, droplet nuclei (sneeze), cooking oil, most smoke and insecticide dust, most face powder, most paint pigments hospital & general surgery 13–16 9–12 1.0–3.0 μm 5–8[4] 3.0–10.0 μm 1–4 > 10.0 μm Legionella, Humidifier dust, Lead dust, Milled flour, Auto emission particulates, Nebulizer droplets Mold, spores, dust mite debris, cat and dog dander, hair spray, fabric protector, dusting aids, pudding mix Pollen, dust mites, cockroach debris, sanding dust, spray paint dust, textile fibers, carpet fibers Typical Application [2] Superior residential, better commercial, hospital laboratories Better residential, general commercial, industrial workspaces Residential window AC units
    11. 11. “Cleaning the Air” Indoor Air Filter Design Challenge  Challenge: Design an air filter that filters out the most particulate matter without blocking the air flow  (Challenge Accepted! )
    12. 12. Air Filter Design Criteria & Constraints Criteria: 1. Filter cannot block more than 50% of the air flow 2. Filter must be designed to fit into the testing apparatus 3. Must test filter (at least) once Constraints: 1. Can only use materials provided by teacher 2. Budget of $3.00
    13. 13. Air Filter Testing Apparatus
    14. 14. 1. Aerospace Engineering - Aerospace engineers design, analyze, model, simulate, and test aircraft, spacecraft, satellites, missiles, and rockets. Aerospace technology also extends to many other applications of objects moving within gases or liquids. Examples are golf balls, high-speed trains, hydrofoil ships, or tall buildings in the wind. Aerospace engineers are typically specialists in fields with fancy names such as aerodynamics, propulsion, navigation, flight testing, and more. 2. Acoustical Engineering - Application of acoustics (the science of sound and vibration) in technology. Acoustical engineers are typically concerned with the design, analysis and control of sound. Projects they can work on include improving noise control, developing medical ultrasound equipment, programming digital sound synthesizers, and enhancing building acoustics & sound systems. http://www.engr.utexas.edu/wep/Precollege/Whats_engineering/engineering_disciplines.htmr
    15. 15. 3. Biomedical Engineering - This is an interdisciplinary field combining mechanical, electrical, and chemical engineering to study the human body. Biomedical Engineers study biology and medicine to develop technologies related to health care. They develop medical diagnostic machines, medical instruments, artificial organs, joint replacement parts, and prosthetic devices. 4. Chemical Engineering - Chemical Engineers use their knowledge of physics, chemistry, and biology to discover and manufacture better plastics, paints, fuels, fibers, medicines, fertilizers, semiconductors, paper, and all other kinds of chemicals, by carrying out chemical reactions and purifications.
    16. 16. 5. Civil Engineering - The design and construction of buildings, dams, water treatment and carrying systems, air pollution controls, and transportation systems are the responsibilities of civil engineers. Subcategories of civil engineering include: structural, geotechnical, environmental, transportation, materials, and project management. 6. Construction Engineering – A field which deals with the designing, planning, construction, and management of infrastructures such as highways, bridges, airports, railroads, buildings, dams, and utilities. Construction Engineers are unique because that they are a cross between civil engineers and construction managers. http://www.engr.utexas.edu/wep/Precollege/Whats_engineering/engineering_disciplines.htmr
    17. 17. 7. Computer Engineering - Computer engineers are involved in the development of both hardware and software for computers. They work on computerrelated systems like CD-ROMs, modems and monitors, as well as cutting-edge projects including robotics and virtual reality systems. 8. Environmental Engineering - Keeping the water, air and soil healthy are the responsibilities of environmental engineers. To accomplish this goal they deal with issues including waste management, pollution control and irrigation. 9. Electrical Engineering - Electrical engineering deals with electricity, magnetism, and light and how it is used. Electrical engineers work for many different kinds of companies including the computer, communications, and automotive industries. http://www.engr.utexas.edu/wep/Precollege/Whats_engineering/engineering_disciplines.htmr
    18. 18. 10. Mechanical Engineering - Engineers within this discipline tend to focus on one of three aspects of mechanical engineering: design, manufacturing, or energy/power. Cars, airplanes and toys are just a few of the areas in which mechanical engineers work. 11. Nuclear Engineering - Nuclear engineers design, implement and maintain systems relating to nuclear fission and nuclear fusion. This can range from the construction of a nuclear power plant to researching medical applications of nuclear technology. A nuclear engineer will be involved at every step of the nuclear process, from fission or fusion to the disposal of nuclear waste products. The work of nuclear engineers takes the theoretical research of nuclear physicists and helps to provide practical uses for the public. Taken from: www.discoverengineering.org
    19. 19.  http://www.carbodydesign.com/2012/03/the-design-process-at-the-bmwgroup/
    20. 20. Components of an Air Filter
    21. 21. Electrostatic Precipitator
    22. 22.  The customized filter is just 1 part of the MinusA2's robust 6-stage air filtration system. Other components include:  Washable Pre-Filter - Traps large dust particles, pet hair, and other allergens. This filter is washable to help save you money on replacement filter costs.  Medium Filter - Traps particles larger than 1 micron, including mold spores, pollen, and pet dander. This filter also helps extend the life of the HEPA filter.  BioGS HEPA Filter - A standard in allergen control, the BioGS true HEPA filter removes 99.97% of allergen particles as small as 0.3 microns.  Activated Carbon Filter - This charcoal-based activated carbon filter absorbs common household odors, VOCs, and chemicals.  Negative Ion Generator - The negative ion generator produces millions of healthy negative ions to improve the air you breathe and freshen your indoor environment. This feature can be turned on and off.

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