Max Tech and Beyond Appliance Design Competition Winning Presentation

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Max Tech and Beyond challenged university teams to design and build energy efficient appliances that go beyond current technology on the market. As part of the competition, teams had to present their results during a webinar on May 23, 2012. The presentation from the winning team -- the University of Maryland -- explains its design for a wall air conditioner with separate systems for cooling and removing moisture from indoor air.

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Max Tech and Beyond Appliance Design Competition Winning Presentation

  1. 1. Team SSLCAC Final Progress Report Lead Faculty: Prof. Yunho Hwang Student Presenter: Michael Siemann May 23, 2012MaxTech and Beyond Appliance Design Competition, AY2011/2012
  2. 2. Project Goal•  Target Appliance: Wall Air Conditioner (1Ton)•  Technology Applied: •  Separate Sensible and Latent Cooling •  Radiative Cooling Wall •  Innovative Polymer Desiccant•  Energy Savings Goal: 30% MaxTech and Beyond Appliance Design Competition, AY2011/2012
  3. 3. Baseline Wall Air Conditioner Cool Dry Air Needs to generate temperatures much colder than desired air Warm Moist Air LG LT103HNR (10,000 BTU)Modified from: <HowStuffWorks.com>MaxTech and Beyond Appliance Design Competition, AY2011/2012
  4. 4. SSLCAC Design OverviewRadiative Cooling Wall Desiccant Wheel Separate Sensible and Latent Cooling Angled View of Contained Unit MaxTech and Beyond Appliance Design Competition, AY2011/2012
  5. 5. SSLCAC Design Overview RegenerativeMain Condenser Condenser Evaporator Fan Desiccant Fan Condenser Damper Desiccant Wheel Fan Compressor Evaporator RHX Top View of Contained Unit MaxTech and Beyond Appliance Design Competition, AY2011/2012
  6. 6. SSLCAC Design Overview Outside Inside RegenerativeMain Condenser Condenser Evaporator Fan Desiccant Fan Condenser Damper Desiccant Wheel Fan Compressor Evaporator RHX Top View of Contained Unit MaxTech and Beyond Appliance Design Competition, AY2011/2012
  7. 7. SSLCAC Design Overview VCC Only Outside Inside Cooling Only RegenerativeMain Condenser Condenser Evaporator Fan Desiccant Fan Condenser Damper Desiccant Wheel Fan Compressor Evaporator RHX Top View of Contained Unit MaxTech and Beyond Appliance Design Competition, AY2011/2012
  8. 8. SSLCAC Design OverviewDesiccant Only Outside Inside Dehumidification Regenerative Small heatingMain Condenser Condenser Evaporator Fan Desiccant Fan Condenser Damper Desiccant Wheel Fan Compressor Evaporator RHX Top View of Contained Unit MaxTech and Beyond Appliance Design Competition, AY2011/2012
  9. 9. SSLCAC Design OverviewFull System Outside Inside Dehumidification Regenerative CoolingMain Condenser Condenser Evaporator Fan Desiccant Fan Condenser Damper Desiccant Wheel Fan Compressor Evaporator RHX Top View of Contained Unit MaxTech and Beyond Appliance Design Competition, AY2011/2012
  10. 10. SSLCAC Design Overview Thermal Images RHX•  Sensible Cooling System •  VCC with higher Tevaporator = smaller compressor •  Radiative HX = lower power fan and better distribution MaxTech and Beyond Appliance Design Competition, AY2011/2012
  11. 11. SSLCAC Design Overview•  Sensible Cooling System Desiccant Wheel •  VCC with higher Tevaporator = smaller compressor •  Radiative HX = lower power fan and better distribution•  Latent Cooling System •  Desiccant wheel = low power dehumidification 50℃ regeneration •  Free heat to regenerate desiccant from condenser MaxTech and Beyond Appliance Design Competition, AY2011/2012
  12. 12. SSLCAC Design Overview•  Sensible Cooling System •  VCC with higher Tevaporator = smaller compressor - 30% •  Radiative HX = lower power fan and better distribution - 5%•  Latent Cooling System Desiccant wheel = low •  power dehumidification + 1% Free heat to regenerate •  desiccant from condenser + 4%•  Translates into energy savings 30% MaxTech and Beyond Appliance Design Competition, AY2011/2012
  13. 13. SSLCAC Experimental Evaluation Applied ASHRAE Standard T T P1 T T T TXV Desiccant Wheel VFR T T RH2 P3 P2 T T T RH3 Air Blender From tap Qevap Power COPe = Wcompressor + ∑W fan,i T RH1 i MaxTech and Beyond Appliance Design Competition, AY2011/2012
  14. 14. Test Results SSLC Parameter   Baseline   VCC Only VCC-RHX VCC/RHX/DW Pevap [kPa]   951   1097 1221 1164 Pcond [kPa]   2481   2456 2405 2403 Tevap [°C]   3.81   9.7 13.5 11.7 Tcond [°C]   41.20   40.8 39.9 39.9 Superheat [°C]   1.58   2.22 0.71 0.78 Subcooling [°C]   7.58   3.27 0.54 0.47Mass Flow Rate [g/s]   16.4   19.3 22.0 20.8 Wtotal [kW]   0.94   0.94 0.85 0.85 Qevap [kW]   2.75   3.20 3.54 3.34 COPe   2.91   3.34 4.15 3.92 MaxTech and Beyond Appliance Design Competition, AY2011/2012
  15. 15. Test Results SSLC Parameter   Baseline   VCC Only VCC-RHX VCC/RHX/DW Pevap [kPa]   951   1097 1221 1164 Pcond [kPa]   2481   2456 2405 2403 Tevap [°C]   3.81   9.7 13.5 11.7 Tcond [°C]   41.20   40.8 39.9 39.9 Superheat [°C]   1.58   2.22 0.71 0.78 Subcooling [°C]   7.58   3.27 0.54 0.47Mass Flow Rate [g/s]   16.4   19.3 22.0 20.8 Wtotal [kW]   0.94   0.94 0.85 0.85 Qevap [kW]   2.75   3.20 3.54 3.34 COPe   2.91   3.34 4.15 3.92 26% Higher COP MaxTech and Beyond Appliance Design Competition, AY2011/2012
  16. 16. Future Work (before competition end)•  Prototype Tuning •  Components •  Refrigerant and air side•  SEER Testing •  Multiple test conditions•  Transient Testing and Simulations •  Multiple climate zones •  True value of SSLC•  Product Cost Estimation•  Videos:<www.youtube.com/user/TeamUMDSSLCAC?feature=mhee> MaxTech and Beyond Appliance Design Competition, AY2011/2012
  17. 17. Conclusion•  Target Appliance: Wall Air Conditioner•  Innovation: •  Separate Sensible and Latent Cooling •  Radiative Cooling Wall •  Low Regeneration Temperature Polymer Desiccant•  Energy Savings Goal: 30%•  Tested Prototype Energy Savings: 26%•  Projected Energy Savings: 30%Project was a success! MaxTech and Beyond Appliance Design Competition, AY2011/2012
  18. 18. Acknowledgements•  Team members: Angle, Jon (G); Corfman, Kyle (UG); DeGennaro, David (UG); Foo, Andrew (UG); Ganye, Randy (UG); Genes, James (UG); Hesser, Nicholas (UG); Kang, Inhye (UG); Knapp, Bryan (G); Li, Gang (G); Li, Seaver (UG); Li, Song (G); Long, Hung (G); Mandel, Bracha (G); Olszewski, Aaron(UG); Popli, Sahil (G; Qian, Suxin (G); Sy, Hannele (UG); Vaaland, Oeyvind (G); Vu, Lam (UG); Zhou, Yvonne (UG)•  Lead PI: Dr. Yunho Hwang•  Post-Doc: Dr. Jiazhen Ling•  Student Lead: Michael Siemann•  Funding: DOE, EERE, BT•  Special Thanks: LBNL, Stacy, Kimberly MaxTech and Beyond Appliance Design Competition, AY2011/2012

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