Solar glass

Solar glass ( English collector glazing ) is a special glass to cover thermal solar collectors and in the photovoltaic . The glass should allow as much solar radiation as possible to enter the collector. Wavelength-selective reflective layers (e.g. thin metal layers) are also conceivable in order to reflect back the thermal radiation re-emitted by the absorber , or anti-reflective coatings in order to reduce the light reflection occurring at the glass interfaces due to the refractive index. However, these coatings pose a risk in terms of their aging, which is why they are not common.

Solar glass has the following differences compared to window glass :

• The lower iron content makes it more transparent.
• It is often thermally or chemically hardened ( single-pane safety glass ) in order to better cope with mechanical stresses (hail) and has a higher thermal shock resistance than window glass in order to be able to withstand laterally inhomogeneous temperature distribution better.
• Solar glass is divided into classes and marked with these in order to allow comparison. For classification purposes, an ideal flat (i.e. unstructured) pane with a transmittance of 1 is assumed as the reference.
• Solar glass is specified by a so-called glass efficiency. It is made up of the transparency, the angle dependence of the transparency (angle weighting factor) and two degradation factors: aging and ultraviolet degradation.

This article or the following section is not adequately provided with supporting documents ( e.g. individual evidence ). Information without sufficient evidence could be removed soon. Please help Wikipedia by researching the information and including good evidence.

In the field of industrial horticulture, the use of solar glass as a roofing material is increasingly being used today. Studies have shown that the increased permeability in the UV range can have some positive effects on the plant material. This increases the hardening of the plants, the plants accumulate more protective ingredients and sometimes produce more intense flower colors. It is also possible to change the color of the leaves and flowers.

swell

1. ↑ Goran Mijic: Solar Energy and Technology , Volume 2, De Gruyter, 2018, ISBN 978-3-11-047577-7 , p. 104
2. ↑ http://www.spf.ch/fileadmin/daten/publ/OTTI2002_Solarglas.pdf Stefan Brunold, Ueli Frei: What is solar glass? , Publication by the Institute for Solar Technology SPF , accessed on October 22, 2017