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Green AC S ystem Design

Green AC S ystem Design. Senior Design Team 7 Fall 2010. Daniella Aking Philip Gregor Kirk Harvey Ariel Sanchez Yiding Cao Ph.D. . Advisor: . Presentation Outline. History of Refrigerants Problem Statement Legacy Project Continuation Constraints and Goals Designs

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Green AC S ystem Design

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  1. Green AC System Design Senior Design Team 7 Fall 2010 Daniella Aking Philip Gregor Kirk Harvey Ariel Sanchez Yiding Cao Ph.D. Advisor:

  2. Presentation Outline • History of Refrigerants • Problem Statement • Legacy • Project Continuation • Constraints and Goals • Designs • Alternate Designs • Project Deadlines *No trees were killed in the making of this presentation however, a large number of electrons were severely inconvenienced.

  3. History of Refrigerants • R-134a • Tetrafluoroethane (CH2FCF3) • Refrigerant for domestic refrigeration • GWPR-134a = 1300 • Subject to use restrictions due to environmental impacts • Outlawed in Europe by 2011

  4. Problem Statement • Development of an air condition system, with high efficiency and low environmental impact • Low GWP • Zero Ozone depletion • High COP • Competitive pricing • Competitive Efficiency

  5. Legacy • Yiding Cao Ph.D. adopts the Wankel Rotary Engine for the new gas refrigeration system • Senior Design Team 13 Spring 2010 • Modification of Wankel rotary Engine • Integration of a cooling chamber • Valve control system • Proof of concept

  6. Concept • Rotary single phase compressor and expander

  7. Legacy Alteration • Reduction of friction, lubrication, and refinement of rotary components • Cooling chamber enhancement • Valve system optimization • System testing

  8. Constraints and Goals • Design a system for residential and commercial use • Competitive price • Minimal environmental impact • Coefficient of Performance (COP) • Match COP of current A/C systems that utilize R-134a and 422 • Match system cooling capacity

  9. CO2 and N2 Observations • CO2: Higher COP in comparison to compression ratio • N2: Higher Refrigeration capacity compared to compression ratio

  10. Compression Ratio

  11. Evaporator Design • Tailored to compressor design specifications • Single Phase Design • Reduction of spikes and drops in pressure • Heat transfer efficiency • Material Considerations • Coil design • Fin design • Airflow

  12. Radiator Design • Fluid considerations or additives • Cooling efficiency • Size and Cost • Pump alternatives • Using power transferred from compressor motor • Individual pump • Fan power and speed • Airflow

  13. Coil Design Alternatives Single coil design - 3D Multiple smaller diameter coils – 3D Single coil – 2D

  14. Project Deadlines

  15. Conclusion • Design of the single phase AC system that will be highly efficient and have low environmental impact and that will produce coefficient of performance comparable to the current systems • Modifications to current compressor/expander • Designs for single phase components

  16. Any Questions?

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