Glossary
The following definitions reflect those used by the International Energy Agency (IEA); definitions used by other organisations and publications may vary.
T&D
transmission and distribution (of electricity)
TAME
tertiary amyl methyl ether
TCB
Energy Training & Capacity Building Programme (of the IEA)
TFC
total final consumption
TGC
tradable green certificate
TPED
total primary energy demand
TPES
total primary energy supply
TTW
tank-to-wheel
technology transfer
The term has two definitions. The first definition is the process of converting scientific findings from research laboratories into useful products by the private sector. The second definition is used more in economic development literature and involves cross-border transmission of technology from one country to another.
total final consumption
the sum of consumption by the different end-use sectors. TFC is broken down into energy demand in the following sectors: industry, transport, buildings (including residential and services) and other (including agriculture and non-energy use). It excludes international marine and aviation bunkers, except at world level where it is included in the transport sector.
total final consumption (TFC)
the sum of consumption by the different end-use sectors. Total final consumption is broken down into energy demand in the following sectors: industry, transport, other (includes agriculture, residential, commercial and public services) and nonenergy uses. Industry includes manufacturing, construction and mining industries. In final consumption, petrochemical feedstocks appear under industry use.
total primary energy demand (TPED)
represents domestic demand only and is broken down into power generation, other energy sector and total final consumption.
total primary energy supply (TPES)
equivalent to total primary energy demand. This represents inland demand only and, except for world energy demand, excludes international marine and aviation bunkers.
traditional biomass
the use of fuelwood, charcoal, animal dung and agricultural residues in stoves with very low efficiencies.
transactions
a condition under a contract between a buyer and seller to exchange an asset for payment.
transport
fuels and electricity used in the transport of goods or persons within the national territory irrespective of the economic sector within which the activity occurs. This includes fuel and electricity delivered to vehicles using public roads or for use in rail vehicles; fuel delivered to vessels for domestic navigation; fuel delivered to aircraft for domestic aviation; and energy consumed in the delivery of fuels through pipelines. Fuel delivered to international marine and aviation bunkers is presented only at the world level and is excluded from the transport sector at the domestic level.
t
tonne = metric ton = 1000kg
t/y
tonne per year
tcf
thousand cubic feet
tcm
trillion cubic metres
TJ
terajoule
tkm
tonne-kilometres
TWh
terawatt hour