Handbook on environmental assessment of products

Appendix A
Formulae

Formula

Page

(1) Material consumption
no. of kg of material [A] x mPR/kg for [A] = mPR for material [A]
  
(2) Primary energy consumption
Amount of material [kg ] x primary energy for the material [Mj/kg] = primary energy consumption [Mj]
  
(3) Conversion of energy
Electricity consumption [MJ] x 2.5 = primary energy consumption [MJ]
  
(4) Conversion of energy
Electricity consumption [kWh] x 9 = primary energy consumption [MJ]
  
(5) Energy contents in energy resources
Energy resource [kg] x calorific value [MJ/kg] = primary energy consumption [MJ]
  
(6) Energy contents on incineration
Material [kg] x calorific value [MJ/kg] = heat generation [MJ]
  
(7) Energy consumption during transport
The sum of: (transported material [kg] x distance [km] x nergy consumption [MJ/(kg x km)]) = total energy consumption[MJ]
  
(8) Consumption of energy resources
Energy consumption [MJ] / 1,025 [MJ/mPR oil] = consumption of oil resources [mPR]