The collector design is modular in steps of 4 m length and consists of 11 primary mirror rows with a width of 0.5 m each. The primary mirrors are made of tempered white glass with silver backside coating. They are mechanically bent to concentrate the sunlight on a tubular vacuum receiver (SCHOTT PTR® 70) with secondary CPC concentrator 4 m above the mirror field. The secondary is an aluminium mirror in CPC shape (Alcan Singen / Alanod). Each mirror row is moved by an individual drive connected to an embedded Linux unit with astronomical control software.

Optical Performance parameters were derived out of Raytracing calculations, thermal performance parameters could be deducted from reported measurements [2]. For practical use we defined a site independent number of thumb for the peak capacity.

Robur has installed two of their NH3/H2O absorption chillers in a modified version with a heat exchanger for pressurized water. These can be seen in Figure 1 on the right hand side of the picture. The collector is aligned with the building, which is not exactly north-south oriented, but turned 7.6° towards SE-NW.