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UP: Fachverband Umweltphysik

UP 5: Postersession

UP 5.19: Poster

Dienstag, 14. März 2017, 16:40–18:10, GW2 B3010

Development of a measuring device to detect the angular distribution of solar irradiance — •Jörg Bendfeld, Stefan Balluff, Tobias Harst, Stefan Wübbecke, and Johannes Becker — Universität Paderborn, Paderborn, Deutschland

The precise knowledge of solar resources is important for the most efficient conversion of irradiation into solar energy.Global Horizontal Irradiance (GHI) is the total amount of solar radiation received from the sun by a horizontal surface. This value is a base information for photovoltaic installations and includes both Direct Normal Irradiance (DNI) and Diffuse Horizontal Irradiance (DHI).Direct Normal Irradiance (DNI) is the solar irradiation received by a surface that is normal to direction of the sun. The DNI is of importance for concentrating solar thermal installations and tracking Units. Diffuse Horizontal Irradiance (DHI) is the irradiation without the direct DNI. This diffuse irradition is caused by scattering of molecules and particles in the atmosphere. The new device will be able to detect all of this parameters and will be able to differentiate between the direction of all irradiation components. In contrast to classical pyranometers, the new device responds to the solar irradiation with an angular range sensor instead of a single horizontally oriented receptor surface. These tubular optical system is mounted on a gear to reach every azimuth and elevation angle over a hemispherical surface with a configuration which minimises overlap and missed regions of the sky. The internal surfaces of the tubular optical systems are designed to suppress reflections. This ensures sharply defined delimitation of the individual sky regions.