4. Analysis of the developing trend of aluminum substitution
for copper
We studied the possible cost changes under the boundary
conditions to depict the dynamic relationship between costs and
the proportion of aluminum replacing copper. The values for the
year 2009 were used as boundary conditions. These conditions
include energy consumption during copper and aluminum production,
indoor air conditioner output, national copper and aluminum
output, as well as the average prices of copper, aluminum,
and carbon sink forest.