1.5 : Generic Fuel Quad and Comparison




1.5.1 Key Definitions
Quad: Quadrillion Btu (10^15 or 1,000,000,000,000,000 Btu)
Generic Quad for the Buildings Sector: One quad of primary energy consumed in the buildings sector (includes the
residential and commercial sectors), apportioned between the various primary fuels used in the sector according to their relative
consumption in a given year. To obtain this value, electricity is converted into its primary energy forms according to relative fuel
contributions (or shares) used to produce electricity in the given year.
Electric Quad (Generic Quad for the Electric Utility Sector): One quad of primary energy consumed at electric
utility power plants to supply electricity to end-users, shared among various fuels according to their relative contribution in
a given year. (Note: The consumption of an electric quad results in the delivery of just under 1/3 the electric quad due to
generation and transmission losses.)
Primary Energy: The total energy consumed by an end-user, including the energy used in the generation and transmission of
electricity. Also referred to as "source" energy.
Delivered Energy: The energy consumed by an end-user on site, not including electricity generation and transmission losses.









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