Quad (energy)

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A typical chart using quads.
A typical chart using quads.

A quad is a unit of energy equal to 1015 (a short-scale quadrillion) BTU,[1] or 1.055 × 1018 joules (1.055 exajoules or EJ) in SI units.

The unit is used by the U.S. Department of Energy in discussing world and national energy budgets. The global primary energy production in 2004 was 446 quad, equivalent to 471 EJ. [2]

[edit] References

  1. ^ Energy: Glossary. Department of Materials Science and Engineering, University of Illinois Urbana-Champaign. “QUAD: an amount of energy equal to 1015 BTU.”
  2. ^ Energy Information Administration (2006-07-31). World Consumption of Primary Energy by Energy Type and Selected Country (Excel spreadsheet). International Energy Annual 2004. Retrieved on 2007-05-12.


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