In connection with the large-scale development of high-rise building projects recently in Russia and abroad and their significant energy consumption, one of the main principles in designing is the use of effective energy-saving technologies. Also, important aspects are reducing energy consumption and neutralizing the environmental impact of tall buildings. The most promising areas in the field of integration of solar modules (planar and concentrating) in the construction of buildings are development of BIPV technologies (roofing, film, facade materials), the integration of solar energy concentrators that do not require biaxial tracking (medium and low concentrations) on the facades and roofs of buildings (parabolic concentrators, lenses, and Fresnel mirrors), integration of highly concentrated modules on the roofs of buildings.
TopRoofing Solar Panel As An Element Of Solar Power Plants With Concentrators For Buildings
Solar roofing is becoming increasingly popular, especially in the southern regions. The purpose of (Strebkov, Kirsanov, Irodionov, et al., 2015) is to create a roofing solar panel with high optical efficiency and low consumption of semiconductor material and low cost.
In the roofing solar panel (Strebkov, Kirsanov, Irodionov et al., 2015) mounted on an inclined roof of a building or structure, the normal to the roof surface is in the meridional plane containing the body with an internal cavity with a protective coating on the working surface, onto which the solar radiation with an angle of entry of rays β0, and receivers from commutated solar cells, in the cavity of the housing 1, under the protective coating, a composite concentrator is installed, made in the form of a deflecting optical system transparent to radiation from a variety of prisms with sharp key Ψ between the entrance and exit surfaces of the rays and several semi-parabolic cylindrical reflectors with a parametric angle δ having the surfaces of the entry and exit of rays, the focal regions of all semi-parabolic cylindrical reflectors are shifted to the lower or upper side of the roofing solar panel, and the radiation detectors from the connected solar cells are installed in parallel focal axis and perpendicular to the plane of the roofing solar panel between the focal axis and the mirror coating of each half a parabola-cylindrical specular reflector, a plane of the entrance surface of the rays of the deflecting optical system and a plane of the entrance surface of the rays of the semi-parabolic cylindrical reflector are parallel to the plane of the protective coating, and the angle of entry of rays β0, an acute angle Ψ and the refractive index n of the material of the deflecting optical system are associated with the parametric angle δ of the semi-parabolic cylindrical mirror reflector as follows:
The housing of the roofing solar panel can be made of impact-resistant plastic, ceramics, a mixture of sand and plastic. The internal cavity of the housing can be molded to accommodate a protective coating of semi-parabolic cylindrical reflectors, a deflecting optical system and receivers from commutated solar cells.
The protective coating of the roofing solar panel can be made in the form of an optical deflecting system consisting of semi-parabolic cylindrical reflectors made of flat glass mirror faces, the planes of which are parallel to the focal axis, and the width of the glass mirror faces in the meridional plane is comparable to or greater than the width of the receiver from the switched solar cells.
Mirror reflectors of the optical deflecting system can be made of polished aluminum sheet alloy.