Environmental Impacts of Multi-Storey Buildings Using Different ...

- 68 -700060005000Energy (GJ)40003000200010000CeilingDoorsExterior WallsFoundationsGround Floor SlabsInterior WallsLouvresRoofStairsStructureSuspended FloorsWindowsBuidling typeConcrete Steel Timber Timber+Figure 6.6: Total embodied energy (GJ) for each building component, compared between building typesThe global warming potential of the building components is shown in Figure 6.7Figure6.7Figure 6.7, and it can be seen that the values in general follow the same trends as theembodied energy graph (Figure 6.6Figure 6.6Figure 6.6). Again the three largest contributorsare the suspended floors and structure of the Concrete and Steel buildings, and the aluminiumlouvres on all buildings except the TimberPlus building.600500400GWP (t CO2 equiv.)300200ConcreteSteelTimberTimber+1000CeilingDoorsExterior WallsFoundationsGround Floor SlabsInterior WallsLouvresRoofStairsStructureSuspended FloorsWindowsBuilding componentFigure 6.7: GWP (tonnes CO 2 equivalent) estimated for each building component, compared betweenbuilding typesFigure 6.6Figure 6.6Figure 6.6 and Figure 6.7Figure 6.7Figure 6.7 show clearly that theprimary energy consumption and the global warming potential of the structure of the Steeland Concrete buildings are higher than for the structures of the Timber buildings.