| Abstract: | Coating and Evacuation of Solar Collector Tubes The company NARVA, a traditional German producer of fluorescent lamps, has started in 2005 the development of a new vacuum absorber tube for collecting of solar energy for warmth of buildings or for process heat. By adapting the experience of lamp making NARVA is using their self produced soda lime glass, coated with Siliciumdioxide nano particles for the collector tubes. This coating gives better transmission, less corrosion and a behaviour like safety glass in case of destruction. A other interesting item in the development of the vacuum process is the „light oven”︁. By use the light oven it was possible to reach the necessary temperature on the absorber fin for an effective desorption of the water molecules from the surface of the fins and to reach the target vacuum. |
