Life Cycle Assessment of Fiber Composites_final__rättad

3.10. Impact Assessment Method
The three categories that would be taken into account are global warming,
acidification and abiotic depletion. The method that has been used to analyze
the impacts is CML 2 baseline 2000. This method is an update from the CML
1992 method. This version is based on the spreadsheet version 2.7 (April 2004)
as published on the CML web site. (Sima Pro 6.4) This method was selected as
it shows an overall picture of the specific impacts that we are studying. It takes
into account global warming, acidification and abiotic depletion.
3.11. Choice of Impact Categories
As mentioned earlier the impact categories that will be taken into account are
global warming, acidification, and abiotic depletion since they all play and
important role in the lifecycle of Stena Hollandica. These are some of the areas
where Stena lines are interested in reducing the environmental impacts. It is
also some of the common problems related to the ship industry in Sweden.
3.11.1. Global warming
Over the year’s emissions from industries, car, fuel combustion, deforestation
has led to the phenomena called as the global warming. This is caused due to
the greenhouse effect. Gases as carbon dioxide, NO X , SO X and methane cause
the heat to be trapped with in the earth and stop it from moving into the space.
This has led to increased temperature of earth and has led to climate change. In
this LCA we will study the impact of the superstructure on these phenomena,
as we believe because it will be consuming a lot of energy especially in the
operation phase where fuel is being used which will lead to various emissions
into air. Therefore it is necessary to study this impact category. The other
reason we have considered is as lighter weight structure leads to faster moving
vessels and more fuel efficiency therefore it would be interesting how the
weight and material of the structure could help in reduction in global warming.
3.11.2. Acidification
Acidification is another process where, SOX, ammonia and NOX produced
due to combustion of fuel may result of acid rain (fog, snow) on reaction with
water vapors. This results in acidification, which is a threat to fresh water
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