A solar unit comprising a solar energy concentrator with a reflecting surface made of flat facets, and a rotatable solar energy receiver disposed in a solar spot of said concentrator, test objects being mounted on said receiver. The solar energy receiver may be made in the form of a polyhedron or a disk.

This invention provides a solar heating unit constituted of any suitable flexible material, such as plastic, so that when not in use or during transportation it may be rolled into a compact structure easily transported and installed. Further the present solar heating unit consists of a plurality of tubes arranged in parallel relation and connected at their ends to manifolds with the two outermost tubes of the unit and the manifolds having a greater outside vertical diameter than the intermediate...

A solar array and method of its fabrication wherein the solar cells are attached to a supporting substrate and electrically joined by interconnects having end terminals attached to the cell contacts with predetermined center distances between adjacent cell-substrate attachment points and the terminal attachment points of each interconnect, such that during thermal cycling of the solar array, each interconnect and the portion of the substrate between the adjacent cell-substrate attachment points ...

A solar array having solar cells arranged in parallel strings at the front side of a supporting substrate with the corresponding cells in the several strings arranged in rows transverse to the strings. Each cell has a rear contact surface facing and exposed through an opening in the substrate and front contact and light sensitive surfaces. The cells in each cell string are connected in electrical series by series interconnectors, each passing between a pair of adjacent cells and through the subs...

A solar concentrator module comprising a front lens on its front face, a receiver cell on its rear face and a reflector between the front lens and the receiver cell, said reflector having inclined sidewalls along at least two opposite sides of the receiver cell characterised in that the reflectors are truncated and in that the sidewalls of the reflectors are inclined in such a way that, for a 0[deg] off-pointing, solar rays are reflected on the inclined side walls of the reflectors before imping...

A steam boiler (14) is situated on a tower (16) at the center of concentric tracks (17), (18), and (19). Poles (21) and (23) have wheels (25) running on the tracks. The poles are kept upright on the tracks with guylines (35) and struts (31) and (33). The poles carry frameworks (24) with mirrors (12) attached to them. As the earth turns, the poles move along the tracks, keeping the mirrors on the opposite side of the boiler from the sun and keeping sunlight focused approximately on the boiler. As...

A solar collector includes a copper plate and copper tubes for the collection and harnessing of solar energy. The copper tubes are thermally coupled to the copper plate by a copper alloy fillet. The copper tubes, the copper plate and the copper alloy fillet preferably are brazed in a controlled atmospheric furnace at a temperature in the range from approximately 1700 to about 1800 degrees Fahrenheit. The solar collector includes a housing for the plate and the tubes having two side walls, two en...

The invention refers to sun generators, which at the same time deliver warm water and electrical current in the form of direct current (DC) and alternating current (AC) and are working at a large angle range to the emitting radiation and their color can be adapted to that of the environment and which will not freeze at low temperatures.

A solar cell has a high ability to prevent recombination of electrons near the cell surface, wherein a surface of a p-type substrate at a surface is provided with an n-type region subjected to a treatment with a phosphorus containing acid and a silicon nitride layer is then directly formed on the n-type region. The solar cell can be prepared at a low temperature by a method comprising 1) a step of subjecting the n-type region to a phosphorus containing acid treatment at a low temperature and 2) ...

A space solar concentrator based on deployable reflectors attached to a panel base is described. Each of the reflectors includes sides coated with reflective coating on surfaces facing away from the base. In one embodiment, the sides of the reflector have thicker portion to provide stiffness for deployment absent compressive force, and thinner portion to reduce weight and storage energy. In another embodiment, both reflective sides are unfolded when the reflectors are in stowed position. During ...