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Sustainability Engineering
Refrigerator recycling
Please note: for this question you need to refer to the USCAR/VRP rating scheme for part (c). Cite the references at end of the each questions.
Many countries have instituted laws for recycling home appliances. For example, Japan has instituted a home appliance recycling Law. A representative refrigerator from Hungary has been taken for further investigation (see table 1).
Materials in refrigerator body
Compressor
PUR foam
6.440 kg
cast iron
1.748kg
Fe-sheet (Fe means iron)
8.996kg
steel machined
1.663kg
Plastics
6.681kg
steel-sheets
4.090kg
copper
2.310kg
Cu formed (Cu means copper)
0.593kg
Aluminum
0.990kg
Cu windings
1.300kg
glass
0.800kg
Subtotal
9.394kg
Miscellaneous
1.970kg
28.187kg
Total
37.581kg
Table 1: Material composition of an average refrigerator
a) Assume you have to design a completely automated fashion recycling process. How would you separate the refrigerator's materials in completely automated fashion without human disassembly? Focus on the groups given in the above table only.
b) Discuss the pros and cons of using human manual disassembly in this case.
c) What is the refrigerators current and technical feasible recyclability (by weight) using the USCAR/VRP rating scheme? Assume that it is technically feasible to separate the materials. Explain your assumptions and reasoning?
d) Give 10 general Design for Recycling Guidelines and discuss (what you thinking?) whether they increase or decrease product manufacture cost.
e) Give pros and cons for remanufacturing refrigerators?
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