The data used for the aluminum sheet (AlMg3) production
represents the cradle-to-gate inventory data from the average
European aluminum industry . The amount of aluminum
needed in different diffuser scenarios is presented in Table 2.
Apart from the aluminum sheet, no other materials are required
in the machining of the diffuser. The electricity use for diffuser
machining is derived from the estimated electricity consumption
of a suitable milling machine. The annual electricity consumption
during the compressor use phase for different scenarios was calculated
in the previous section. The life cycle inventory data on electricity
represents the average Finnish electricity production