Proposal for definitions Atle Tostensen Senior Adviser, Statistics Norway 3rd OCG meeting, Vienna, 4 February 2008 Energy statistics Energy statistics
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Senior Adviser, Statistics Norway
3rd OCG meeting, Vienna, 4 February 2008
“Energy statistics is used as an umbrella term for all the different ways of producing and presenting data and statistics on flows of energy. This includes basic energy statistics, energy supply and use and all standard tabulations.”
“Basic energy statistics are statistics on production, imports and exports, stock changes, input for transformation into another energy source, non-energy use, transport and final energy consumption of primary and secondary energy sources or commodities.”
In order to go from basic energy statistics to a setup of the total supply and use of energy in a country (or another area), it is necessary to combine the basic energy statistics in one system of energy supply and use. The aim is to creates a multipurpose system for energy statistics which makes it possible to generate user reports based on user needs. (must be specified after ESU-chapter is finished)
“Energy means the capacity for doing work or for producing heat; energy can be regarded as “stored work”. The heat produced may be so intense as to emit light. Heat, light, motive force and chemical change induced by, or resulting in, electricity cover sufficiently for the present purpose the range of manifestation of “energy””.
(From the old UN manuals)
“Primary energy should be used to designate those sources that only involve extraction or capture, with or without separation from contiguous material, cleaning or grading, before the energy embodied in that source can be converted into heat or mechanical work.
Secondary energy should be used to designate all sources of energy that results from transformation of primary sources. Fuel, alone, should be used only when describing those energy sources, whether primary or secondary, that must be subject to combustion or fission in order to release for use the energy stored up inside them.”
“Energy commodities are either extracted or captured directly from natural resources (and are termed primary) such as crude oil, hard coal, natural gas, or are produced from primary commodities. All energy commodities which are not primary but produced from primary commodities are termed secondary commodities. Secondary energy comes from the transformation of primary or secondary energy.”
“[…] the energy obtained from devices driven mechanically by air or water (wind, hydro, wave, tidal etc.). In almost all cases the mechanical force present in the moving parts of the apparatus is used to generate electricity (there are of course a few exceptions such as pumping water from wind mills).”