27 An Economic Evaluation of Recycling System in Next-Generation …
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Firstly, after EV · HEV is used, these are discarded and collected as disposal
companies as disposal vehicles. Second, at the dismantling company, take out the
motor from the disposal vehicle. The motor is transported by truck to a recycling
facility. Finally, at the recycling facilities, the rare earth is regenerated through demagnetization and refining of the motor. In this research, the demagnetization process
indicates that the magnet is extracted from the rare earth which became a magnet,
and the refining refers to the operation of removing impurities from the rare earth
and taking out highly pure rare earth. In addition, since the transport covered by this
research covers a collection of motors to be discarded, transportation of magnets
regenerated at the recycling facilities is not considered. Therefore, collect only in
the area to be recovered and do not consider the consumption of the magnet inside
or outside of the area afterward.
27.3.2 Precondition Used in This Research
In this research, the following precondition are used for simplicity.
• It is assumed that existing buildings are used for recycling facilities.
• Only one demagnetization processing device is installed at each recycling
facilities, and the service life of the device is set to 10 years.
• The distance between the disassembling base and the recycling base is defined as
Euclidean distance × 1.3, and transportation costs are generated in proportion to
this distance.
• Do not consider processing capacity constraints of recycling facilities.
• The motor is transported to the nearest recycling facilities.
• As for the collection route, the same route will always be used after the introduction
of the recycling equipment, and it will not be changed.
• Delivery time and limitations on the working hours of the driver are not taken into
consideration.
27.3.3 Materials and Methods—Location Routing Problem
In this research setting in Japan, we set only an HEV motor as the target of an
EOL product because it is the main product that utilizes an NdFeB-sintered magnet.
The future demand for HEV was estimated using the 2001–2015 annual demand for
HEVs and by applying it to perform a multiple regression analysis based on the future
global population and gross domestic product (GDP) using the SRES B2 scenario
(Intergovernmental Panel on Climate Change 2007).
Next, let us consider estimating the number of waste vehicle using the forecasted
number of units sold. A similar case to this is the research report on re-use cars, among
which the recovery distribution is reported to follow a log-normal distribution (Rai
and Singh 2006).
387
Firstly, after EV · HEV is used, these are discarded and collected as disposal
companies as disposal vehicles. Second, at the dismantling company, take out the
motor from the disposal vehicle. The motor is transported by truck to a recycling
facility. Finally, at the recycling facilities, the rare earth is regenerated through demagnetization and refining of the motor. In this research, the demagnetization process
indicates that the magnet is extracted from the rare earth which became a magnet,
and the refining refers to the operation of removing impurities from the rare earth
and taking out highly pure rare earth. In addition, since the transport covered by this
research covers a collection of motors to be discarded, transportation of magnets
regenerated at the recycling facilities is not considered. Therefore, collect only in
the area to be recovered and do not consider the consumption of the magnet inside
or outside of the area afterward.
27.3.2 Precondition Used in This Research
In this research, the following precondition are used for simplicity.
• It is assumed that existing buildings are used for recycling facilities.
• Only one demagnetization processing device is installed at each recycling
facilities, and the service life of the device is set to 10 years.
• The distance between the disassembling base and the recycling base is defined as
Euclidean distance × 1.3, and transportation costs are generated in proportion to
this distance.
• Do not consider processing capacity constraints of recycling facilities.
• The motor is transported to the nearest recycling facilities.
• As for the collection route, the same route will always be used after the introduction
of the recycling equipment, and it will not be changed.
• Delivery time and limitations on the working hours of the driver are not taken into
consideration.
27.3.3 Materials and Methods—Location Routing Problem
In this research setting in Japan, we set only an HEV motor as the target of an
EOL product because it is the main product that utilizes an NdFeB-sintered magnet.
The future demand for HEV was estimated using the 2001–2015 annual demand for
HEVs and by applying it to perform a multiple regression analysis based on the future
global population and gross domestic product (GDP) using the SRES B2 scenario
(Intergovernmental Panel on Climate Change 2007).
Next, let us consider estimating the number of waste vehicle using the forecasted
number of units sold. A similar case to this is the research report on re-use cars, among
which the recovery distribution is reported to follow a log-normal distribution (Rai
and Singh 2006).