Q&A - Result

Definition

• What are the so called “energy intensive branches” in industry?

  The usual energy intensive branches of industry sector considered at EU level are steel, cement, pulp and paper, chemicals and non-ferrous metals (i.e. aluminium, copper). They are called energy intensive as they represent a significant share of the total energy consumption of industry (around 2/3) and the energy expenditures represent a high share of the production cost. More information at http://www.odyssee-mure.eu/publications/efficiency-by-sector/industry/energy-consumption-trend-industrial-branch-eu.html

  Related question

  • What does energy intensity at constant structure mean?

Methodology

• How many branches are part from the industry sector in Odyssee?

  Industry is made of mining, manufacturing, construction and electricity, gas & water. Manufacturing is made of 14 branches.

• How is the energy intensity of industry at adjusted structure calculated?

  For a given country, the energy intensity of industry at adjusted structure (of a reference country) is calculated as the sum over each sub-sector i (i.e. industrial branch) of the multiplication of the observed energy intensity of sub-sector i (EIi) of that country (i.e. energy consumption per unit of value added) by the share of sub-sector i in the total value added of industry of the reference country (VAi/VA).

  =∑_i▒〖(〖VA〗_(i,ref,t)/〖VA〗_(ref,t) )*〖EI〗_(i,t) 〗

  
  

• What are the different energy efficiency indicators in industry?

  In industry, energy efficiency indicators should preferably be expressed in physical units (e.g. toe, GJ per tonne). For industry subsectors (i.e. branches) for which there is not a dominant product, the energy consumption can be related to the index of production, as this index is deemed to represent the physical production of a branch. Another indicator is also used to compare the energy performance of industrial branches is the energy intensity (i.e. energy consumption per unit of value added). This is the case for the calculation of the energy intensity of industry at adjusted structure.

  Related question

  • How many branches are part from the industry sector in Odyssee?
• How is calculated the energy efficiency index (ODEX) in industry?

  The energy efficiency index in industry combines the energy efficiency trends by branch in one index (industry ODEX).

  Energy efficiency trends by branch are measured from the variation of specific energy consumption, expressed in toe/t (or GJ/t) for energy intensive branches (steel, cement, pulp and paper) and toe (or GJ) per unit of production index (IPI) for the other branches.

  To account for the different units used, all specific consumption is then expressed in index.

  The industry ODEX is then calculated by weighting the indices of specific consumption by branch with the share of each branch in the industry sector’s energy consumption.

  Up to 15 branches are considered for industry ODEX. The detail calculation is explained in http://www.odyssee-mure.eu/publications/other/odex-indicators-database-definition.html

  
  More info
  

  Related question

  • What is ODEX?

Tools

• How can I compare the energy intensity of industry of different countries?

  The energy intensity level of industry of country X is influenced by energy intensity levels of each branch and by the industry specialization of country X (i.e. the share of the different branches in the total value added or industry structure). Therefore, to have a meaningful comparison of country X with reference countries, it is better to correct for the specialization factor by comparing the energy intensities with the same industry structure: this is done by comparing the energy intensities at adjusted structure.

  For that purpose you can use the benchmarking tool http://www.indicators.odyssee-mure.eu/benchmarking.html for the industry sector.

  
  

  Related question

  • How is the energy intensity of industry at adjusted structure calculated?