SOLAR-POWERED MINI COOLERPreliminary Design Review Presentation

MembersJose BrisenoGabriel CruzSpencer EricksonMatt Kuhlman Chad Odwin Alex Parlato

Faculty AdvisorDr. Lionel Hewavitharana

Logo derived from models found at https://grabcad.com

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Overview Objective Design Considerations Design Limitations Analysis of Problem Possible Solutions – Shell Possible Solutions – Cooling Comparison Analysis Summary and Recommendation Project Schedule Acknowledgement

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Objective Need to cool beverages while at the beach, with no ice Solution of a Solar Powered Mini-Cooler Not as straightforward as it seems

Difficulties in the concept Not only difficult in the concept, but the implementation of the design

as well

Design Considerations Heat transfer in a Closed System (Controlled Volume)

Closed cooler allows for assumption of a simple controlled volume Ambient of up to 35°C

Durability of the cooler Drop from 3ft onto concrete, no shock or physical damage

Ease of Use Non-confusing controls User adjustable internal temp Easy to clean

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Design Limitations Need to cool a controlled volume to a specific temp, regardless of

ambient Regulate the volume temperature to a user defined, or pre-defined,

temperature Cool a maximum of a 2ft3 control volume Need to be aware of how much power we can achieve from solar

panels Can be limited in the cooling capacity if limited to only panels for

power Use of battery packs can give more cooling power, and use when

sun is limited

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Possible Solutions - Shell6

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Concept 1 Concept 2

Possible Solutions - Shell7

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Concept 4Concept 3

Possible Solutions - Shell8

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Concept 6Concept 5

Possible Solutions - Cooling9

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Vapor CompressionHighest COPLargely MechanicalLarge SizeExpensive Refrigerants

Thermodynamics: An Engineering Approach, 7th editionby Yunus A. Çengel and Michael A. Boles

Possible Solutions - Cooling10

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AbsorptionModerate COPFew Mechanical

PartsLarge SizeCheap Refrigerants

Thermodynamics: An Engineering Approach, 7th editionby Yunus A. Çengel and Michael A. Boles

Possible Solutions - Cooling11

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ThermoelectricLowest COPNo Mechanical PartsCompact SizeLowest Weight

Thermodynamics: An Engineering Approach, 7th editionby Yunus A. Çengel and Michael A. Boles

Comparison Analysis12

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Each of the different concept designs were rated by using a weight comparison table and then compared to each other Rated by using general criteria with different weighted values.

The design that has the highest rating would be chosen as the cooler that we choose to build

If certain aspects from a lower rated cooler design are useful they may be incorporated into the final design.

Comparison Analysis13

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Useable surface area for the solar panels – 30% Must be able to collect sunlight anytime of the day when the sun is out Solar panel area will require around 1000 in2 for 100W worth of panels

Maneuverability/Ergonomics – 20% Easy to carry or roll when empty or lightly filled Easy to lift into trunks or backseats as well as storage

Efficiency – 30% Walls of the cooler are thick enough to minimize heat conduction Electronics do not interfere with temperature of cooler Constructed in such a way that the least amount of power is required to keep it

cool Asthetics – 20%

Professional, minimal, and rugged

Comparison Analysis14

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Summary and Recommendation15

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Concept one was selected for further development of the solar powered mini cooler and is also the preferred preliminary design

This design is simple and should be easy to use for any consumers.

Summary and Recommendation16

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Cooling Techniques Multiple Peltier Cooler at low voltages (without

fan) Single Peltier Cooler with fans

Project Schedule17

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ID Task Name

1 Engineering Design Specification2 Develop Individual EDS3 Collaborate and Merge Specs4 Compile Final Results5 Concept Designs6 Develop Individual Concept Designs7 Select Final Concept Design8 Preliminary Design Review9 PDR Report11 Formatting12 Introductory Material13 Analysis and Definition of the Problem 14 Possible Solution 15 Project Schedule16 Comparison Analysis 17 Summary and Recommendations 10 Compile18 PDR Presentation19 Create Presentation Slides20 Compile Presentation Slides21 PDR Presentation22 Configuration Design23 Configuration Design31 Parametric Design32 Parametric Design24 Critical Design Review27 CDR Presentation30 CDR Presentation28 Create Presentation Slides29 Compile Presentation Slides25 CDR Report26 CDR Report

Alex Parlato,Chad Odwin,Gabriel Cruz,Jose Briseno,Mathew Kuhlman,Spencer EricksonAlex Parlato,Chad Odwin,Gabriel Cruz,Jose Briseno,Mathew Kuhlman,Spencer Erickson

Jose Briseno

Alex Parlato,Chad Odwin,Gabriel Cruz,Jose Briseno,Mathew Kuhlman,Spencer EricksonAlex Parlato,Chad Odwin,Gabriel Cruz,Jose Briseno,Mathew Kuhlman,Spencer Erickson

Chad OdwinChad OdwinJose Briseno,Spencer EricksonAlex Parlato,Mathew KuhlmanAlex ParlatoAlex Parlato,Mathew Kuhlman,Gabriel CruzSpencer Erickson,Jose Briseno

Jose Briseno

Alex Parlato,Chad Odwin,Gabriel Cruz,Jose Briseno,Mathew Kuhlman,Spencer EricksonJose Briseno2/26

S T T S M W F S T T S M W F S T T S M W F S T T S M W F S T T S M W F S T T S M W F S T T SJan 19, '14 Jan 26, '14 Feb 2, '14 Feb 9, '14 Feb 16, '14 Feb 23, '14 Mar 2, '14 Mar 9, '14 Mar 16, '14 Mar 23, '14 Mar 30, '14 Apr 6, '14 Apr 13, '14

AcknowledgementsDr. Lionel Hewavitharana – Faculty AdvisorDuke Energy – Grantmaker

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