BE1100 Design Project Getting Rid of the Ice

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BE1100 Design ProjectGetting Rid of the Ice
Ryan Bedford Eric Gonzalez Meghan Vohs Jason
Harris
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Identification of a Need

• PROBLEM Inconvenience for drivers in below
  freezing temperatures
• NEED An automatic device that will clear the
  windshield of frost and ice

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Problem Definition

• Designing a mechanism that will eliminate solid
  precipitation on windshield
• We want the device to be automatic to reduce
  driver inconvenience

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Search

• Triplex Safety Glass Co. has developed a
  windshield film called Hyviz
• Visteon/Southwall collaborate to design a
  windshield film called XIR
• Nano-tubes
• Rear window defrosters
• Ice scrapper
• Garage
• Solar cells and batteries
• Temperature Sensors

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Constraints

• Visibility
• Size
• Battery - must fit in original car design
• Safety must be able to crumble with glass

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Criteria

• Cost of production verse profit
• Types of materials used
• Appearance of exterior parts
• Automatic Device

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Alternate Solutions

• Ice Scraper
• Garage
• Powered by car battery
• Solar Powered Device (Using either conductive
  film or nano-tubes)

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Analysis Ice Scraper

• PROS CONS
• Save Loss of time
• Expenditure of personal Energy
• Out in the cold

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Analysis - Garage

• PROS CONS
• No frost/snow Expensive to construct
• Saves time Not everyone has a garage May
  not be room for all needed cars

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Analysis Car Battery Powered Device

• PROS CONS
• Lower cost May drain the battery
• Saves time

EST. BUDGET
HIGH LOW
CAR BATTERY 80 (12V) 40 (12V)
TEMP SENSOR 150 40
NANO-TUBES 1,000 (2mm long) ????
XIR OR HYVIZ FILM ???? ????
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Analysis Solar Powered Device

• PROS CONS
• Decreases fuel emissions Cost
• Saves gas
• Saves time

EST. BUDGET
HIGH LOW
SOLAR BATTERY 75 (12V) 13.95 (12V)
SOLAR CELLS 55 (12x8.75) 45 (11x8.75)
TEMP SENSOR 150 40
NANO-TUBES 1,000 (2mm long) ????
XIR OR HYVIZ FILM ???? ????
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Specifications - Solar Power Design
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Hyviz Data

• Want a film with a resistance of .52 ohm/square
• Wv2/r
• Wtotal power in watts
• Vsupply voltage
• rresistance load in in ohms
• WV2/r(sq)d2
• ddepth of windshield between busbars
• r(sq)ohms/square area
• Wpower density in watts/in2
• Vsupply voltage

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Graph of defrosting times at 0 ºF
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Specifications of Hyviz Film
Film thickness is around 3000 Angstroms With
this thickness there is around 80 transmission
of visible light through the windshield. Any
power density over .5 W/in2 needs a temperature
sensor to avoid overheating and to conserve power
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Decision

• To satisfy the Constraints Criteria as best as
  possible while considering the Identification of
  the Need, we will choose the Solar Powered Device
• Automatic system
• Saves time
• Fits all existing vehicle qualities
• Not an unrealistic production cost

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Communication

• Commercials
• Promote in higher priced cars (BMW, Mercedes,
  Bentley and Cadillac)
• Promote in colder climate areas
• Introduce at Auto Shows

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THE END