total emissivity

См. также в других словарях:

• Emissivity — The emissivity of a material (usually written ε or e) is the relative ability of its surface to emit energy by radiation. It is the ratio of energy radiated by a particular material to energy radiated by a black body at the same temperature. A… …   Wikipedia

• total directional emissivity — visuminė kryptinio spinduliavimo geba statusas T sritis Standartizacija ir metrologija apibrėžtis Nagrinėjamojo paviršiaus visuminis energinis skaistis, padalytas iš visuminio visiškojo spinduolio energinio skaisčio esant tai pačiai temperatūrai …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

• total hemispherical emissivity — visuminė pusiau sferinio spinduliavimo geba statusas T sritis Standartizacija ir metrologija apibrėžtis Nagrinėjamojo paviršiaus visuminis pusiau sferinis energinis šviesis, padalytas iš visuminio visiškojo spinduolio pusiau sferinio energinio… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

• total directional emissivity — visuminė kryptinio spinduliavimo geba statusas T sritis fizika atitikmenys: angl. total directional emissivity vok. gerichteter Gesamtemissionsgrad, m rus. полная направленная излучательная способность, f pranc. émissivité directionnelle totale,… …   Fizikos terminų žodynas

• Low-emissivity — (Low E) coatings are microscopically thin, virtually invisible, metal or metallic oxide layers deposited on a window or skylight glazing surface primarily to reduce the U factor by suppressing radiative heat flow. The principal mechanism of heat… …   Wikipedia

• Black body — As the temperature decreases, the peak of the blackbody radiation curve moves to lower intensities and longer wavelengths. The blackbody radiation graph is also compared with the classical model of Rayleigh and Jeans …   Wikipedia

• Stefan–Boltzmann law — The Stefan–Boltzmann law, also known as Stefan s law, states that the total energy radiated per unit surface area of a black body in unit time (known variously as the black body irradiance, energy flux density, radiant flux, or the emissive… …   Wikipedia

• R-value (insulation) — The R value or R value is a measure of thermal resistance (K·m²/W) [Oak Ridge National Laboratory, [http://www.ornl.gov/sci/roofs+walls/insulation/ins 02.html Which Kind Of Insulation Is Best?] , retrieved 2008 07 13.] used in the building and… …   Wikipedia

• Concentrated solar power — The PS10 Solar Power Plant concentrates sunlight from a field of heliostats onto a central solar power tower. Concentrated solar power (CSP) systems use mirrors or lenses to concentrate a large area of sunlight, or solar thermal energy, onto a… …   Wikipedia

• Cool roof — In the world of industrial and commercial buildings, a cool roof is a roofing system that can deliver high solar reflectance (the ability to reflect the visible, infrared and ultraviolet wavelengths of the sun, reducing heat transfer to the… …   Wikipedia

• Measurement of sea ice — Annual growth and retreat of the polar ice packs from SeaWiFS images Measurement of sea ice is important for safety of navigation and for monitoring the environment, particularly the climate. Record keeping of direct observations began over a… …   Wikipedia