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Industrial Ecology – Spring 2012. Mr. Coffee – Redesign and Conclusions. Recap – Disassembly & Analysis Conclusions Redesign – Use Phase and Additional Improvements Conclusions – Total Impact Reduction. Table of Contents. Disassembly- Explosion Diagram.

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Mr. Coffee – Redesign and Conclusions

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Mr coffee redesign and conclusions

Industrial Ecology – Spring 2012

Mr. Coffee – Redesign and Conclusions

Table of contents

Recap – Disassembly & Analysis Conclusions

Redesign – Use Phase and Additional Improvements

Conclusions – Total Impact Reduction

Table of Contents

Disassembly explosion diagram

Disassembly- Explosion Diagram

Eco audit energy summary

Carbon and Energy Totals

Eco Audit- Energy Summary

Eco audit water consumption summary

Eco Audit- Water Consumption Summary

Problem statement where we left off

Problem Statement – Where we left off

Function objectives constraints free variables

Function, Objectives, Constraints, Free Variables

Redesign design requirements

Redesign – Design Requirements

Redesign coffee pot materials selection

Redesign – Coffee Pot Materials Selection

Redesign analysis of polypropylene

Redesign – Analysis of Polypropylene

Redesign analysis of polypropylene1

Redesign – Analysis of Polypropylene

Use phase key design changes

Use Phase – Key Design Changes

  • Insulated Coffee Carafe

  • Heating Element Location

  • Stainless Steel Reusable Filter

  • 8-cup Water Capacity

Redesign insulating carafe

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

Redesign result of insulating carafe

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


57% cut in energy consumption

Usage adjustments reusable filters

Usage Adjustments – Reusable Filters

Saves up to 334.3 MJ of energy and 7.5kg of CO2

Usage adjustments reduction in water capacity

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

Redesign analysis redesign of packaging materials

Redesign – Analysis & Redesign of Packaging Materials

Redesign eliminating water transport in use phase

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 (

Redesign calculating energy gains

Redesign – Calculating Energy Gains

Redesign calculating energy gains1

Redesign – Calculating Energy Gains

Saves Approximately 18 MJ Per Unit



Redesign water heating diagram

Redesign: Water & Heating Diagram

Redesign filter basket

Redesign: Filter & Basket

Redesign cumulative results

Redesign: Cumulative Results

Conclusions overall impact

Conclusions- Overall Impact




  • 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

Final conclusions and changes

Final Conclusions and Changes

Insulated Carafe

Reusable Stainless Steel Filter

8-Cup Water Capacity

Location of the Heating Element

Works cited

Works Cited

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