Vapor-dominated sites offer temperatures from 240 to 300 °C that produce superheated steam.

Vaporisation of an element or compound is a phase transition from the liquid phase to vapor.

Vapor–liquid equilibrium describes the distribution of a chemical species between the vapor phase and a liquid phase.

Variable costs are costs that change as the quantity of the good or service that a business produces changes.

VIT has been a traditional feature of Wärtsilä (Sulzer) slow-speed engines allowing to adapt an optimum injection timing over an engine load to various fuel properties having a poor combustion behaviour.

The optional system for Wärtsilä 46F engine. VIC offers the flexibility to apply early inlet valve closure at high load for lowest NOx levels...

Variable renewable energy is a renewable energy source that is non-dispatchable due to its fluctuating nature, like wind power and solar power, as opposed to a controllable renewable energy source such as dammed hydroelectricity, or biomass, or a relatively constant source such as geothermal power.

A turbine designed to operate at varying rotational speeds to enable

A type of motor drive used in electro-mechanical drive systems to control AC motor speed and torque by varying motor input frequency and voltage.

A variable-frequency transformer is used to transmit electricity between two (asynchronous or synchronous) alternating current frequency domains.

A vector (sometimes called a geometric vector or spatial vector) is a geometric object that has magnitude (or length) and direction.

Vector control, also called field-oriented control, is a variable-frequency drive control method in which the stator currents of a three-phase AC or brushless DC electric motor are identified as two orthogonal components that can be visualized with a vector.

Vegetable oil can be used as an alternative fuel in diesel engines and in heating oil burners.

Vehicle-to-grid describes a system in which plug-in electric vehicles, such as battery electric vehicles, plug-in hybrids or hydrogen fuel cell electric vehicles, communicate with the power grid to sell demand response services by either returning electricity to the grid or by throttling their charging rate.

The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time.

Ventilation is the circulation and refreshing of the air in a space without necessarily a change of temperature.

Ventilative cooling is the use of natural or mechanical ventilation to cool indoor spaces.

Any grid, vent pipe or opening through which air can enter or leave a space. Vent pipes on the weatherdeck can be a source of water ingress to lower deck areas.

According to the International Convention on Load Lines, 1966, ventilators in position 1 shall have coamings of a height of at least 900 milimetres above the deck...

A cover arrangement which is fitted over a ventilator to prevent the entry of rain, or sea water. It may also be used as a means of closure.