Torrefaction is a thermochemical treatment of biomass at 200 to 320 °C (392 to 608ºF).

The torr is a unit of pressure based on an absolute scale, one torr is 133.32 Pa.

Torque is the rotational equivalent of linear force.

With the toroidal core winding technology an electric coil or winding is created by winding an electrical conductor (e.g. copper wire) through the circular ring and evenly distributing it over the circumference.

Topography is the study of the forms and features of land surfaces.

The tonne of oil equivalent (toe) is a unit of energy defined as the amount of energy released by burning one tonne of crude oil.

A top drive is a mechanical device on a drilling rig that provides clockwise torque to the drill string to drill a borehole.

A ton of refrigeration, also called a refrigeration ton, is a unit of power used in some countries (especially in North America) to describe the heat-extraction capacity of refrigeration and air conditioning equipment.

TIV MPI Resolution is a Turbine Installation Vessel deployed to install turbines at offshore wind farms.

TIV MPI Adventure is a 14,739 GT wind turbine installation vessel that was built in 2010 by Cosco Nantong Shipyard, China.

The ratio of the tangential speed of the blade and the actual speed of the wind.

A time-domain reflectometer is an electronic instrument used to determine the characteristics of electrical lines by observing reflected waveforms.

Time of use net metering employs a smart (electric) meter that is programmed to determine electricity usage any time during the day.

A tide mill is a water mill driven by tidal rise and fall.

A tide gauge is a device for measuring the change in sea level relative to a vertical datum.

Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun, and the rotation of the Earth.

A tidal stream generator, often referred to as a tidal energy converter, is a machine that extracts energy from moving masses of water, in particular tides.

Tidal power or tidal energy is harnessed by converting energy from tides into useful forms of power, mainly electricity using various methods.

A tidal energy design that can capture the potential energy of tides by construction of circular retaining walls embedded with turbines.

Energy that is harnessed from the rise and fall of ocean tides.