A device for measuring temperatures, consisting of lengths of two dissimilar metals or alloys that are electrically joined at one end and connected to a voltage-measuring instrument at the other end. When one junction is hotter than the other, a thermal e ...

A temperature-sensing element which converts thermal energy directly into electrical energy. In its basic form it consists of two dissimilar metallic conductors connected in a closed loop. Each junction forms a thermocouple. If one thermocouple is maintai ...

Category:Meteorology

An idealized process in which a working fluid (water, air, ammonia, etc) successively changes its state (from a liquid to a gas and back to a liquid) for the purpose of producing useful work or energy, or transferring energy.

Category:Energy Terms

A study of the transformation of energy from one form to another, and its practical application. (see Law(s) of Thermodynamics above).

Category:Energy Terms

The amount of work done on or by a system is equal to the amount of energy transferred to or from the system.

Category:Sea Words

Heat cannot, of itself, pass from a colder to a hotter body.

Category:Sea Words

The conversion of heat into electricity by the use of thermocouples.

Category:Energy Terms

A type of electrical thermometer consisting of two thermocouples which are series-connected with a potentiometer and a constant-temperature bath. One couple, called the reference junction, is placed in a constant-temperature bath, while the other is used ...

Category:Meteorology

Corrosion resulting from an electrochemical cell caused by a thermal gradient.

A self-recording thermometer.

Category:Meteorology

A building energy auditing technique for locating areas of low insulation in a building envelope by means of a thermographic scanner.

Category:Energy Terms

An instrument for measuring temperature by utilizing the variation of the physical properties of substances according to their thermal states. Thermometers may be classified into types according to their construction; deformation thermometer, electrical t ...

Category:Meteorology

Same as instrument shelter.

Category:Meteorology

A device used to hold liquid-in-glass maximum and minimum thermometers in the proper recording position inside an instrument shelter, and to permit them to be read and reset. See Townsend support.

Category:Meteorology

A device where sunlight concentrated onto a absorber heats it to a high temperature, and the thermal radiation emitted by the absorber is used as the energy source for a photovoltaic cell that is designed to maximize conversion efficiency at the wavelengt ...

Category:Energy Terms

A large number of thermocouples connected in series.

Category:Energy Terms

A transducer for converting thermal energy directly into electrical energy. It is composed of pairs of thermocouples which are connected either in series or in parallel. Thermopiles are used in thermoelectric radiation instruments when the output of a sin ...

Category:Meteorology

Same as instrument shelter.

Category:Meteorology

A device used to control temperatures; used to control the operation of heating and cooling devices by turning the device on or off when a specified temperature is reached.

Category:Energy Terms