Life Cycle Assessment of Fiber Composites_final__rättad

4. Life Cycle Inventory Analysis
In this chapter the data collected and how it was used for modeling the three
super structures will be discussed. It takes into account all calculations made
and all assumptions made in order to construct, operate and maintain the
superstructures. It also studies the various waste scenarios in each case.
4.1. Process flow chart
The three life cycles are broken down into 4 phases that are
Manufacturing Operation Maintenance Scrapping
Fig 4.1. Flow Chart of Life Cycle of Stena Hollandica
The three comparative life cycles have been divided into four basic steps. First
step that is the manufacturing, which includes all the materials, used and energy
consumed for manufacturing of the superstructures this also includes data of
emission from extraction of raw material to the use stage. Second stage would
have data for operation of the ship where we would study the total tons
transported and fuel consumption. Fuel and transported weight are materials
that would be added in this part of the lifecycle. All three ships are assumed to
travel the same distance and have the same fuel consumption, but would vary
with regard to the amount of cargo transported, which causes the difference in
impact per ton kilometer (tkm) during operation. It would also vary in regard
that the fuel per ton would be different for different structures. For e.g. a
lighter weight structure would carry more weight per ton of fuel. In
maintenance we consider the material that is used or replaced in the
maintenance stage. At the end is where the ship is broken down and waste is
sent to different place where they could be incinerated, land filled or recycled
according to the designed scenario
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