Как выбрать гостиницу для кошек
14 декабря, 2021
The SOLITEM PTC 1800 collector will be used in the pilot installation. This parabolic trough collector system is assembled from modules with an aperture width of 1,8 m and a length 5 m each. The concentrator consists of aluminium sheet kept in shape by specially manufactured aluminium profiles. ALANOD Mirosun reflector sheets are glued onto this structure. Additional stiffness is provided by a torsion tube mounted at the back of the concentrator. Up to 4 modules installed in series form a row, 6 rows can be connected to a single drive unit to be tracked via a rope and pulley arrangement. A sun position calculation gives the input for an approximate tracking of the collectors while sun sensors installed in several locations of the collectors provide data for a precise positioning (fine tuning). Mounted in the focal line is a stainless steel absorber tube with 40 mm diameter, which has been galvanically coated with a selective surface. A non-evacuated glass envelope reduces the convective heat losses from the absorber. Flexible hoses with thermal insulation and a metal fabric envelope connect the moving absorber tubes with the stationary field piping.
To obtain reliable performance data for design and performance calculations, a single row has been installed at the DLR test facilities in Cologne for a measurement campaign in summer 2008 (Figure 1). For the design Design considerations