Mr. Coffee – Redesign and Conclusions

1. Industrial Ecology – Spring 2012 Mr. Coffee – Redesign and Conclusions

2. Recap – Disassembly & Analysis Conclusions Redesign – Use Phase and Additional Improvements Conclusions – Total Impact Reduction Table of Contents

3. Disassembly- Explosion Diagram http://www.buyspares.co.uk/tefal/coffee-makers/896115-vitesse-coffee-maker/catalogue.pl?shop=tefal&path=290047&model_ref=41271&illustration_ref=27443

4. Carbon and Energy Totals Eco Audit- Energy Summary

5. Eco Audit- Water Consumption Summary

6. Problem Statement – Where we left off

7. Function, Objectives, Constraints, Free Variables

8. Redesign – Design Requirements

9. Redesign – Coffee Pot Materials Selection

10. Redesign – Analysis of Polypropylene

11. Redesign – Analysis of Polypropylene

12. Use Phase – Key Design Changes • Insulated Coffee Carafe • Heating Element Location • Stainless Steel Reusable Filter • 8-cup Water Capacity

13. Redesign: Insulating Carafe • Dual shell vacuum insulation. • Minimal points of contact. • Minimal heat loss by conduction. • Keeps coffee warm at 160F (71C) for up to 6 hours. • No need for reheating of coffee

14. Redesign: Result of Insulating Carafe • Heat transfer by conduction. • Heat transfer is minimized by the coefficient of thermal conductivity of insular material. • Heat transfer is minimized by the insulation thickness. • Energy Calculations. • - Input at 900watts • -10min/day on time • Energy = 900J/s*600s=540kJ/day • Life time = 6yrs • Energy = 540kJ/day*365day*6years • =1182.6MJ/lifetime Life time energy saving 2770MJ-1182.6MJ=1587MJ 57% cut in energy consumption

15. Usage Adjustments – Reusable Filters Saves up to 334.3 MJ of energy and 7.5kg of CO2

16. Usage Adjustments – Reduction in Water Capacity Original Use Water Consumption: 93,220kg By reducing capacity to 8 cups, an estimated reduction in daily use is 2 cups Total Use = 74,661kg New Water Consumption: Water Savings: 18,559kg

17. Redesign – Analysis & Redesign of Packaging Materials

18. Redesign – Eliminating water transport in Use phase • Assumptions: • The entire reservoir,8 cups is transported through the machine in approximately 10 minutes • The Coffee is warmed to 90.5-96C (Environmental impacts of different methods of coffee preparation by Eva Brommer,BrittaStratmann and Dietlinde Quack) • Energy losses can be directly correlated to energy savings. • Room temperature is 23 degrees Celsius. • The tubing is a perfect cylinder of length .3556 meters • Coefficient of Thermal Conductivity of the Tubing is .13 W/mK (http://www.engineeringtoolbox.com/thermal-conductivity-d_429.html)

19. Redesign – Calculating Energy Gains

20. Redesign – Calculating Energy Gains Saves Approximately 18 MJ Per Unit

21. Redesign:

22. Redesign: Water & Heating Diagram

23. Redesign: Filter & Basket

24. Redesign: Cumulative Results

25. Conclusions- Overall Impact

26. Conclusion Comparability: • Costs – New Design is in the same price bracket as original • End-of-Life – Both glass and stainless steel can be recycled Significant Findings: • Insulated carafe is responsible for the most dramatic energy savings • Stainless steel would be an easy substitute for the glass carafe

27. Final Conclusions and Changes Insulated Carafe Reusable Stainless Steel Filter 8-Cup Water Capacity Location of the Heating Element

28. Works Cited http://www.buyspares.co.uk/tefal/coffee-makers/896115-vitesse-coffee-maker/catalogue.pl?shop=tefal&path=290047&model_ref=41271&illustration_ref=27443 http://www.statista.com/statistics/220433/life-expectancy-of-coffee-machines/ http://www.energystar.gov/ia/products/downloads/ENERGY_STAR_Scoping_Report_Coffee_Makers.pdf