| 摘要 |
The present invention describes a body for use as insulation in a solar thermal collector system, wherein the body is composed of a silica aerogel material having a density in the range of 100-250 kg/m3 and a heat conductivity ? of less than 0.020 W / (m * K) when measured at a density of 150 kg/m3 and temperature of about 200C. Furthermore is described among others a solar receiver tube 7 for high temperature solar thermal collector systems, comprising an absorber tube 2 for enclosure of a heating medium, two halfpipe-shaped bodies 1 of silica aerogel material according to the invention, which halfpipe-shaped bodies 1 bear against each other to form a symmetrical or non-symmetrical cylinder- shaped insulation which bears against the absorber tube 2 and two protective casings 4 of a transparent glass material, each enclosing a halfpipe-shaped body 1 of silica aerogel material, wherein the protective casings 4 are connected to each other. |
