Abstract: A solar concentrator system, comprising a plurality of long metal foils with a reflective surface, longitudinally tensioned from both free ends by respective end moving frames with tensioning means, and supported by a plurality of uniformly spaced intermediate moving frames.Each moving frame has a respective driving crank, secured to a common bushing, mounted on a horizontal shaft, said shaft being secured to a respective support pedestal, a plurality of said support pedestals being secured to a common transverse beam, forming a common support structure.A solar concentrator module has a pair of end support structures with anchor means, and a plurality of uniformly spaced intermediate support structures with sliding means.Each of said end and intermediate support structures has driving means for driving said moving frames, thus forming a plurality of individual support and driving units.

Abstract: A gas turbine engine of simple construction having a compressed air cooler between the first and second stages of compression. A turbine with a heat recuperator is arranged to transfer heat from the exhaust gas stream to the combustion inlet. The air cooler and recuperator are of tubular type, formed by a plurality of small diameter tubes uniformly distributed forming coaxial cylindrical bodies placed one within the other. Heat exchange flanges are joined to each other and are situated in the same plane. The stator parts of the engine constitute a shell assembly having plural shells arranged one within the other with their free ends supported on the flanges of the heat exchangers, hermetically sealing the annular spaces and forming inlet and outlet areas of compressed air in the cooler and in the recuperator.