Disclosed are a reflector for a bifacial solar module and a bifacial photovoltaic system including the same, wherein the reflector includes a reflecting panel configured to reflect sunrays toward back surfaces of a first bifacial solar module and a second bifacial solar module which are located higher than the ground, a mobile cart configured to support the reflecting panel and be movable below and between the first bifacial solar module and the second bifacial solar module, and a control portion configured to control a position of the mobile cart to maximize power generation amounts of the first bifacial solar module and the second bifacial solar module.

A stationary radiation focusing device focuses incident radiation onto a movable radiation receiving element. The radiation focusing device is a curved mirror optimally configured to concentrate the reflected solar energy in a circle of focus aligned with the central axis of the mirror. The radiation receiving element constrained to follow a circle of focus associated with a given point(s) on the mirror's surface. A mirror support structure holds fixed the surface of the mirror in a region about the given point(s), and an adjustment mechanism coupled to the mirror at locations removed from the given point(s) flexes the other regions of the mirror in a manner to compensate for focusing error so that solar radiation incident on such other regions is more nearly focused on the radiation receiving element.

A receiver system for a Fresnel solar plant is provided that includes an absorber tube defining a longitudinal direction, a mirror array that runs parallel to the longitudinal direction and is used for concentrating light beams onto the absorber tube, and a support frame for the absorber tube and the mirror array. A first suspension for holding the absorber tube and a second suspension for holding the mirror array or at least parts of the mirror array are independently mounted on the support frame. The first suspension has first compensation device while the second suspension has second compensation device. The first and second compensation devices allow for different expansions of the absorber tube and the mirror array or at least parts of the mirror array in the longitudinal direction.

A reflective concentrator can include a primary reflector and a secondary reflector located radially outward of the primary reflector. The primary reflector can be a rotationally-symmetric, convex conical shape, radial sections of which may include an off-axis parabolic reflector with a focal point radially outward of the primary reflector. A secondary reflector may be located radially outward of the primary reflector, and may include a rotationally symmetric section of a toroidal space surrounding the primary reflector. In some embodiments, the secondary reflector may be convex or concave. Incident sunlight generally aligned with a rotational axis of symmetry of the primary reflector may be reflected off of the primary reflector, off of the secondary reflector, and back towards a point near the central peak of the primary reflector. The reflective concentrator may be aerodynamically stable, and may include an aerodynamic fairing on its read side to further increase the aerodynamic stability of the structure.

Provided is a solar collector that captures and utilizes solar energy and includes a plurality of vacuum tubes which are disposed by extending horizontally and are disposed parallel to each other with a predetermined distance; and a reflection plate having a substantially planar shape, which reflects solar light on an opposite side of the sun with respect to the plurality of vacuum tubes, in which the reflection plate includes a reflection surface having a serrated section at a corresponding position between vacuum tubes adjacent to each other, and in the reflection surface, one face of a serration forms a first reflection surface that reflects the solar light to the vacuum tube on a lower side among the vacuum tubes adjacent to each other.

Prior art solar energy arrangements are typically structurally complex, have a limited concentration factor and temperature, and their dimensions are large. There is provided a solar energy arrangement and corresponding method for utilizing solar energy by directing sunrays or sunbeams with at least one solar concentrator towards at least one application, device or equipment utilizing solar energy, and a corresponding method, system and computer program product for implementing an arrangement for utilizing solar energy.

A concentrator (10) of sun rays comprising: a reflective body (15) adapted to reflect incident sun rays towards a focal segment (SF) at which the reflected sun rays intersect, wherein the reflective body (15) comprises a plurality of reflective first sheets (40) alongside each other along a flanking direction parallel to the focal segment (SF) and each of which is inclined with respect to a plane perpendicular to a plane passing through the middle point (PM) of the focal segment (SF) and orthogonal to the focal segment itself, wherein each first sheet (40) comprises a reflective surface defined by a plurality of parabolas (401), which are alongside each other with respect to the flanking direction of the first sheets (40) and each have a vertex (Vn1) placed on a vertex segment (SV1), which joins all the vertices (Vn1) of the parabolas (401) of each first sheet (40) have a focal distance varying along the flanking direction and are configured such that each parabola has a focal point (F1, Fn1, F2) placed on the focal segment (SF).

The present invention provides a super efficient solar system that is fixed with respect to the Earth in a standard latitude tilt position. The present invention discloses a method for designing and building a motorized means that allow the hinged reflectors to tilt by tracking the movement of the Sun. The rays of the Sun are reflected and concentrated directly onto the fixed solar cells by movable mirrors or reflectors. The solar energy system is composed of a tilted glass panel side-base which makes it possible for the reflectors to tilt. The multiple components within the solar energy system cooperate to continually concentrate the incoming solar radiation on the solar cells as the Sun runs its course across the sky.

Provided is a light-concentrating solar energy system, comprising a pair of outer reflective elements (110, 110), a pair of inner reflective elements (120, 120) and a solar energy utilization device (130), wherein each pair of reflective elements comprises two reflective elements which are arranged opposite to each other in a tilted manner, and one end thereof with a larger opening is an upper end, which faces a sunlight (LL) incident direction; the pair of inner reflective elements (120, 120) is arranged between the pair of outer reflective elements (110, 110); and a light receiving surface (131) of the solar energy utilization device (130) is arranged at a lower end of the pair of outer reflective elements (110, 110), and the inner reflective elements (120, 120) are located on the light receiving surface (131). The system can realize a relatively high light-concentrating ratio and light-concentrating efficiency at a lower cost.

The present invention provides a solar heat collecting device having good heat collection efficiency. A uniaxial solar-tracking reflective mirror group is arranged such that each longitudinal axis thereof faces the same direction. A first biaxial solar-tracking reflective mirror group and a second biaxial solar-tracking reflective mirror group are arranged lined up in a direction orthogonal to the longitudinal axis direction of uniaxial solar-tracking reflective mirrors. The uniaxial solar-tracking reflective mirror group is arranged so as to be sandwiched on both sides by the first biaxial solar-tracking reflective mirror group and the second biaxial solar-tracking reflective mirror group. Each mirror group sends solar heat received during uniaxial or biaxial tracking in accordance with the position of the sun, to a heat collecting device.