12 Efforts to Reduce CO 2 Emissions in the Japanese Automobile …
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Fig. 12.2 Outline of the green point system (Source Greenpoint Club-JAPRA)
(2) Basis of environmental contribution points
CO 2 emissions of the new part − CO 2 emissions of the reuse part = CO 2 emissions
that may be reduced by using the reuse part.
12.6.3.1 Evaluation Scenario of Reuse-Parts
Figure 12.4 shows the process of new parts and reuse-parts manufacturing. The ELVs
are trucked to Automobile dismantlers to be dismantled. They retrieve trouble-free
parts and market after quality checking. In this reuse parts manufacturing process,
transportation fuel and energies in dismantling are consumed. Meanwhile, in original
system, a new part manufacturing, new resources in new materials and energies in
parts manufacturing are consumed.
Therefore, the CO 2 reduction effect of the reuse parts is given by the following
equation;
R X reuse = (Ev + E M ) − (E T + E D )
(12.1)
where CO 2 reduction effect of a reuse parts X is expressed as R Xreuse ; CO 2 emissions from producing virgin materials is expressed as E V , CO 2 emissions from parts