Glossary

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Browse terms related to these fuel groups:   alternative fuels    coal     electricity     natural gas     nuclear     petroleum    renewable

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BWR:  Boiling-Water Reactor

CWIP:   Construction Work In Progress

EWG:   Exempt Wholesale Generator

GW:  see Gigawatt

Gwe:   See Gigawatt-electric.

GWh:  see Gigawatthour

GWP:  see Global Warming Potential

kW:  See kilowatt

kWe:  See kilowatt-electric

kWh:  See kilowatthour

LWR:  See Light Water Reactor.

MW:  See Megawatt

MWe:  See Megawatt electric

MWh:  See Megawatthour

Owned reserves:  Any reserve of natural gas that the reporting company owns as a result of oil and gas leases, fee-mineral ownership, royalty reservations, or lease or royalty reservations and assignments committed to services under certificate authorizations by FERC. Company-owned recoverable natural gas in underground storage is classified as owned reserves.

Owned/rented:  (As used in EIA's consumption surveys.) The relationship of a housing unit's occupants to the structure itself, not the land on which the structure is located. "Owned" means the owner or co-owner is a member of the household and the housing unit is either fully paid for or mortgaged. A household is classified "rented" even if the rent is paid by someone not living in the unit. "Rent-free" means the unit is not owned or being bought and no money is paid or contracted for rent. Such units are usually provided in exchange for services rendered or as an allowance or favor from a relative or friend not living in the unit. Unless shown separately, rent-free households are grouped with rented households.

Owner occupied:  (As used in EIA's consumption surveys.) Having the owner or the owner's business represented at the site. A building is considered owner occupied if an employee or representative of the owner (such as a building engineer or building manager) maintains office space in the building. Similarly, a chain store is considered owner occupied even though the actual owner may not be in the building but headquartered elsewhere. Other examples of the owner's business occupying a building include State-owned university buildings, elementary and secondary schools owned by a public school district, and a post office where the building is owned by the U.S. Postal Service.

Owners equity:  Interest of the owners in the assets of the business represented by capital contributions and retained earnings.

Ownership:  (See Owned/rented.)

Ownership of building:  (As used in EIA's consumption surveys.) The individual, agency, or organization that owns the building. For certain EIA consumption surveys, building ownership is grouped into the following categories Federal, State, or local government agency; a privately owned utility company; a church, synagogue, or other religious group; or any other type of individual or group.

PWR:  See Pressurized-Water Reactor

Swamp coolers (evaporative coolers):  Air-conditioning equipment that removes heat by evaporating water. Evaporative cooling techniques are most commonly found in warm, dry climates such as in the Southwest, although they are found throughout the country. They usually work by spraying cool water into the air ducts, cooling the air as the spray evaporates.

Switching station:  Facility equipment used to tie together two or more electric circuits through switches. The switches are selectively arranged to permit a circuit to be disconnected or to change the electric connection between the circuits.

SWU:  See Separative Work Unit

TWh:  See Terawatthour