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SOLAR-POWERED MINI COOLER

SOLAR-POWERED MINI COOLER. Preliminary Design Review Presentation. Members Jose Briseno Gabriel Cruz Spencer Erickson Matt Kuhlman Chad Odwin Alex Parlato Faculty Advisor Dr. Lionel Hewavitharana. Logo derived from models found at https://grabcad.com . Chad. Overview.

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SOLAR-POWERED MINI COOLER

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  1. SOLAR-POWERED MINI COOLER Preliminary Design Review Presentation Members Jose Briseno Gabriel Cruz Spencer Erickson Matt Kuhlman Chad Odwin Alex Parlato Faculty Advisor Dr. Lionel Hewavitharana Logo derived from models found at https://grabcad.com

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

  3. Chad 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

  4. Spencer 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

  5. Spencer 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 2ft3control 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

  6. Matt Possible Solutions - Shell Concept 1 Concept 2

  7. Matt Possible Solutions - Shell Concept 3 Concept 4

  8. Matt Possible Solutions - Shell Concept 5 Concept 6

  9. Alex Possible Solutions - Cooling Vapor Compression • Highest COP • Largely Mechanical • Large Size • Expensive Refrigerants Thermodynamics: An Engineering Approach, 7th editionby Yunus A. Çengel and Michael A. Boles

  10. Alex Possible Solutions - Cooling Absorption • Moderate COP • Few Mechanical Parts • Large Size • Cheap Refrigerants Thermodynamics: An Engineering Approach, 7th editionby Yunus A. Çengel and Michael A. Boles

  11. Alex Possible Solutions - Cooling Thermoelectric • Lowest COP • No Mechanical Parts • Compact Size • Lowest Weight Thermodynamics: An Engineering Approach, 7th editionby Yunus A. Çengel and Michael A. Boles

  12. Gabe Comparison Analysis • 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.

  13. Gabe Comparison Analysis • 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

  14. Gabe Comparison Analysis

  15. Jose Summary and Recommendation • 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.

  16. Jose Summary and Recommendation • Cooling Techniques • Multiple Peltier Cooler at low voltages (without fan) • Single Peltier Cooler with fans

  17. Jose Project Schedule

  18. Jose Acknowledgements Dr. Lionel Hewavitharana – Faculty Advisor Duke Energy – Grantmaker

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