For the scenario assessed, the results indicated that about
2.2 102 GJ of energy could be saved for the assumed case study
60,000 m2 building. Of this amount, the largest share of about
57% originated from the recycling of wood. Ferrous metals and
concrete followed next with contributions of about 37% and 6%,
respectively. This result shows an increased contribution of both
ferrous metals and concrete recycling to energy savings when compared
to their relative proportions obtained for the recycling of
their construction waste scenario. The difference in relative proportions
of energy savings between the construction and demolition
scenarios is principally due to the fact that the waste
fractions of these two materials are much higher during demolition
than construction as explained earlier. Also because demolition
clearly dominates total waste amounts, the profile of the relative
contributions of recycling different materials to energy savings in
Thailand is expected to be different from the result presented in
Fig. 3 when C&D waste data based on a national scale characterization
study is utilized for the analysis. It should be noted that the
results obtained from this scenario analysis are largely dependent
on the composition of C&D waste utilized, which varies in different
countries.
For the scenario assessed, the results indicated that about2.2 102 GJ of energy could be saved for the assumed case study60,000 m2 building. Of this amount, the largest share of about57% originated from the recycling of wood. Ferrous metals andconcrete followed next with contributions of about 37% and 6%,respectively. This result shows an increased contribution of bothferrous metals and concrete recycling to energy savings when comparedto their relative proportions obtained for the recycling oftheir construction waste scenario. The difference in relative proportionsof energy savings between the construction and demolitionscenarios is principally due to the fact that the wastefractions of these two materials are much higher during demolitionthan construction as explained earlier. Also because demolitionclearly dominates total waste amounts, the profile of the relativecontributions of recycling different materials to energy savings inThailand is expected to be different from the result presented inFig. 3 when C&D waste data based on a national scale characterizationstudy is utilized for the analysis. It should be noted that theresults obtained from this scenario analysis are largely dependenton the composition of C&D waste utilized, which varies in differentcountries.
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