Design and development of a thermoelectric beverage cooler
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Design and Development of a Thermoelectric Beverage Cooler. By: Brandon Carpenter Andrew Johnston Tim Taylor Faculty Advisor: Dr. Quamrul Mazumder University of Michigan - Flint. Objective. Refrigerator designed for cooling large multiple items

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Design and Development of a Thermoelectric Beverage Cooler

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Design and development of a thermoelectric beverage cooler

Design and Development of a Thermoelectric Beverage Cooler

By:

Brandon Carpenter

Andrew Johnston

Tim Taylor

Faculty Advisor:

Dr. QuamrulMazumder

University of Michigan - Flint


Objective

Objective

  • Refrigerator designed for cooling large

    multiple items

  • Inefficient if only a single item is to

    be cooled

  • Due to size is non-portable

  • Technology requires coolant, compressor,

    and cumbersome tubing


Objective1

Objective

  • Apply concept of refrigerator to a small

    scale device

  • Solid-state, eliminate need for coolants

  • Portability; can be taken wherever needed

  • Concentrate cooling onto single object to

    be cooled, eliminate energy waste in

    cooling empty space


Objective2

Objective

Turn This

Into This


Engineering approach

Engineering Approach

  • Use Peltier thermo cooler to provide

    cooling

  • Use tight fitting aluminum sleeve to

    enhance conductivity

  • Machine base to match contour of

    can bottom

  • Use fans with heat sink to remove heat

  • Power with drill battery


Preliminary calculations

Preliminary Calculations

  • Initial goal: to cool a can from 700F to 350F in approximately 5 minutes.

  • Required Cooling Rate:

    q= ρ V c

    q= (1000kg/m3)( 3.54(10-4)m3)( 4.189kJ/kg∙K)( .0533 K/second)

    This gives a value for q of .079 kW, or 79 Watts.


Further calculations

Further Calculations

  • Base: ΔT = 16K kAl = .58W/m•K A= .00383m2 dx= .0051m

  • q = kA q= (.58)(.00383)(3137) q = 6.99W

  • Sleeve: ΔT = 16K kAl = .58W/m•K

    L = .108m r1= .0327m r2= .0349m

  • q = 2πLk q= 2π(.108)(.58) = 95.4W [3]

  • Total Cooling = 95.4W + 6.99W = 102.4W


Main components

Main Components

  • Peltier Cooler

    Model TEC1-12709

    Rated for 90W/ 139W Max


Notes on cooler

Notes on Cooler

  • While a cooler with a higher rated wattage

    would theoretically be able to remove

    more heat, it creates more heat due to

    resistance and requires a much larger

    heat sink.

  • In order to remain portable a smaller

    cooler was needed, affecting cooling time.


Main components1

Main Components

  • Sleeve

    6061 Aluminum

    Cut to appropriate length

    2.62” Inner Diameter

    0.065” Wall

    Thickness


Main components2

Main Components

  • Machined Base

    6061 Aluminum

    Designed to accommodate various cans,

    as dimensions can differ


Manufacturing assembly

Manufacturing / Assembly

  • Aluminum tubing was cut into appropriate

  • lengths to make sections

    • Beverage Compartment

    • Fan Housing (which was not used)

    • Wiring Compartment

    • Battery Compartment


Manufacturing assembly1

Manufacturing / Assembly

  • Discs were made

    to serve as plates

    between sections

    and for mounting

    purposes


Manufacturing assembly2

Manufacturing / Assembly

  • Components were assembled using

    machine screws and

    adhesives


Manufacturing assembly3

Manufacturing / Assembly

  • Insulation was placed around beverage compartment

  • Thermal paste was

    applied between

    thermo cooler,

    heat sink, top disc,

    base, and sleeve


Testing procedure

Testing Procedure


Testing procedure1

Testing Procedure

  • A 12 oz. pop can is filled with water and placed in the beverage compartment

  • Initial temperature of the water is recorded

  • Cooler is turned on, and temperature is recorded in two minute intervals

  • Additionally, the ambient air temperature, starting battery voltage, and final battery voltage are recorded to check for any correlation


Testing procedure2

Testing Procedure

  • For each test, the data is entered into

    an Excel spreadsheet

For comparison purposes, a similar test was conducted using a refrigerator


Results

Results

Data in graph form


Discussion

Discussion

  • Refrigerator – constant 0.317⁰F / min

  • Cooler - maximum 0.65⁰F / min

    - average 0.317⁰F / min

  • In terms of the cooler outperformed the refrigerator

  • Could only maintain this cooling level for

    short period due to battery


Conclusion

Conclusion

  • With available technology idea is not

    yet practical

  • Current Peltier coolers are not very

    efficient, require large heat sinks which

    hinder portability

  • Also battery power/size ratio insufficient

    for portability


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