Low emissivity coatings can significantly reduce radiative heat losses of glass panes for solar energy use.
Currently, state-of-the-art receivers utilize a vacuum gap above an absorbing surface to minimize the convection losses, and selective surfaces to reduce radiative losses.
For the two sides of the sample, the solar absorbing surface is designed to absorb sunlight and reduce radiative heat loss, while the high emission surface is aimed at enhancing the heat transfer.
These improvements have been attributed to increase in bandgap, reduced radiative recombination, and energy band matching [11, 23, 25, 27, 31, 46].
A gradient design of composite is proposed based on the temperature-dependent optimal opacifier and its diameter, which significantly reduces radiative heat transfer compared to the traditional design.
The effects of silica coating and water droplet size as well as the volume fraction of dry water particles on reducing radiative heat transfer were studied parametrically.
Removal of methane, as compared to other GHGs, has enhanced efficacy in reducing radiative forcing because it liberates more °OH radicals to accelerate the cleaning of the troposphere.
These Ir III) metal complexes are capable of exhibiting high luminescence efficiency, reduced radiative lifetime, and adequate volatility and stability, similar to those of their traditional tris-bidentate Ir III) counterparts, destined to be viable OLED phosphors.
The growing use of plastic film coverings in agriculture is due to the possibility of increasing the air temperature around the plants, reducing radiative and convective energy losses, protecting fruit trees from adverse weather conditions, reducing fungal diseases, assuring less reliance on herbicides and pesticides, better protection of food products and more efficient water conservation.
The proposed film-coupled metamaterial absorber combined with a fishnet-shaped grating shows significant enhancement in its absorption in the visible spectral region compared with a flat Tungsten surface, and it keeps its spectral emission low in the infrared region, thereby reducing radiative heat loss.
The temperature increase is facilitated by the full ionization of helium in the transition region, which significantly reduces radiative cooling of the plasma.
