Radiative cooling and frost formation on surfaces with different thermal emittance: theoretical analysis and practical experience

Autor: Hamberg, Ivar, Svensson, J. Stefan E. M., Eriksson, Tord S., Granqvist, Claes-Göran, Arrenius, Per, Norin, Fredrik
Zdroj: Applied Optics; June 1987, Vol. 26 Issue: 11 p2131-2136, 6p
Abstrakt: Radiative cooling power was computed as a function of the emittance ?s of an exposed surface, air temperature, humidity, etc. from the lowtran 5 code. Meteorological data were then used to make semiquantitative estimates on how often frost will form on a surface with given ?s. Practical tests, using SnO_2-covered glass with ?s ≈ 0.2, demonstrated that a low-emittance coating can prevent frost formation and maintain transparency of a window exposed to the clear sky.
Databáze: Supplemental Index