Data description

Data description

Energy input and output

Fuel inputs to the sites have been reported in GJ. The lower calorific heat values have been used to calculate GJ from m3 or tonnes of fuel. Fossil fuel and biomass fuel have been reported separately.

The energy figures for the sites include both energy for process and energy for infrastructure. No attempts have been made to differentiate between these two types of energy usage because process energy totally dominates (98% or more).

Input of electricity into the sites is also reported. The electricity produced at the site itself is not reported. Some mills sell energy externally in the form of electricity, steam or warm water.

The production sites are treated as a black box in the database, giving data on inputs and outputs only. Because no information is given about what happens within the box it is not possible to calculate an energy balance with the data in the database.

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Allocation of energy to paper grades when a mill produces more than one paper grade

The energy is measured, because it is paid for. Allocation for fuels and electricity input is calculated according to energy (heat and electricity) required for the production of the different paper grades. Allocation of the other fuels, such as diesel oil used for internal transportation, was calculated according to mass production of each paper grade.

There is no technical reason for differences in energy consumption between Testliner and Wellenstoff. However the weighted averages for each paper grade do show differences because different mills are included in the samples. To prevent misunderstanding, the same amounts for energy consumption and emissions to air for both paper grades are reported as their weighted average.