The discussion over this request takes place on the quality assurance side. Here the concrete reason, why this article on the QA sides was registered: In the article wildly with units are rumhantiert, giga, mega, Joul and Watt and avowedly still, as one converts between them. Those hires here at all does not clean-belong. The tables are partly dreadful. Sources are given directly by Web left to the text. In short, at the article is more bad, than I can enumerate here. Should be revised dringenst or be rausnehmen at least the and be come first times in a word on the substantial -- DustyDingo 17:55, 27. May 2006 (CEST)

Primary energy consumption, shortened PEV, indicates, how much energy was used in a national economy in one time unit (mostly one year), in order all energy services as for example to producing, heating, moving, electronic data processing, telecommunications or lighting up to be used.

It is thus the entire of a national economy supplied energy.

This energy is again used mostly immediately. In addition, a part is stored in the form of coal waste dumps, Erdgaskavernen, oil tank camps or also

The state than Bevorrater for strategic reserves, in some countries partly arises for example with oil reserves.

In addition, companies provide primary energy with stock, e.g. in coal waste dumps, Erdgaskavernen etc., in order to be able to serve for times with high energy consumption (capacity) load peaks.

Assigned sources of energy

The assigned sources of energy are:

• Oil
• Natural gas
• Hard coal
• Brown coal
• Nuclear energy
• Water power, wind energy, solar energy
• Geothermie.

The term consumption in connection with energy is wrong in the physical sense. But primary energy consumption becomes understandable, if one regards that in the past coal and oil were used to a large extent as and these materials are used during the energy conversion.

Efficiency principle

For the computation of primary energy consumption in Germany since 1995 the efficiency principle is used. Also the international organizations IEA, EURO ACT and ECE use the efficiency principle.

With the efficiency principle the heat value and the assigned quantities of the sources of energy are put for the computation of the PEVs to reason.

During the evaluation of the nuclear energy, an efficiency is at the basis put of 33% during the energy conversion to river. During the generation of current from other sources of energy those no heat value of the assigned sources of energy to be attached know, the regenerativ energies, water power, wind or Photovoltaik, the produced electricity at the basis are e.g. put. Thus as it were, during this generation of current an efficiency is accepted of 100%, for the computation of primary energy consumption. They are underrepresented thereby, compared with sources of energy, during whose conversion a small efficiency, e.g. the nuclear power without force heat coupling, in the statistics is used to primary energy consumption strongly.

Final energy consumption

In primary energy consumption are, except with the exception described under efficiency principle, also all transformation and transmission "losses" contained. The energetically used part of the energy offer inland is called final energy consumption.

Units

Primary energy consumption is indicated, depending upon source, in different energy units per period:

• Million t. SKE/year (t SKE=Steinkohleeinheit)
• Millions A KW/H/year (a KW/H of kilowatt-hours)
• Petajoule/year
• BTU/year (British thermal unit = BTU)
• Millions Barrel oil/year (international millions barrel/year) (–E))

The many different units make the comparison more difficult of the statistic data from different industries.

The unit energy per time unit (e.g. Petajoule/year) represents however a unit of power. To that extent it is permissible, primary energy consumption per time unit as middle to accept average capacity at primary energy in a national economy.

For Germany primary energy consumption per year amounted to in the year 2004 14,438 PJ/Jahr. That can be converted into a middle capacity at primary energy of 458 GW. Per person with a population of 82.5 millions humans are 5,549 W/Kopf.

Usually multiple of joule, tons of hard coal or tons of is indicated.

Examples of multiples

1 kJ (Kilo joules) = 1000 joule

1 MJ (megajoule) = 10^ {6} joules

1 GJ (Gigajoule) = 10^ {9} joules

1 TJ (Terajoule) = 10^ {12} joules

1 PJ (Petajoule) = 10^ {15} joules

1 EJ (Exajoule) = 10^ {18} joules

1 Mt SKE = 10^ {6} tons of hard coal units

1 Gt = 10^ {9} tons of

Conversion of the energy units into one another

1 kg SKE = 7000 kcal = 8.141 KW/H = 29.3076 MJ

1 kg = 10000 kcal = 11.63 KW/H = 41.868 MJ

1 kcal (kilocalorie) = 4186.8 joule

a 1 KW/H (kilowatt-hour) = 3600 Kilo joules

1000 t SKE (tons of hard coal units) = 29.3076 Terajoule = 700 t

1000 t (tons of = 41.868 Terajoule

Examples of primary energy consumption

Germany

Primary energy consumption in Germany 2003/2004Arbeitsgemeinschaft energy balances energy balance 2004

Giga = 10^ {9} Peta = 10^ {15} <p>Einwohner=82,5; Millions Humans

Europe

In the year 1997 Europe (OECD countries) 71.9 Exajoule

Articles in category "Primary energy consumption"

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