A heliostat frame includes a primary beam and several secondary beams arranged on the primary beam at intervals. The secondary beams are fixed on the primary beam along an extending direction of a center axis of the primary beam, and the secondary beam is provided with several supporting block assemblies. The supporting block assembly includes supporting blocks and adhesive sheets. The supporting blocks are connected with a reflective surface of the heliostat through the adhesive sheets. A height of each of the supporting blocks is configured according to its position on the secondary beam, so that a line connected by centers of top surfaces of all of the supporting blocks on the secondary beam is arc-shaped. The heliostat frame reduces the requirements for the manufacturing accuracy of the secondary beam while guaranteeing surface accuracy of the heliostat, thereby effectively reducing the production costs and improving the manufacturing efficiency.

Passive cooling articles may include a first element defining a high absorbance in an atmospheric infrared wavelength range and a high average reflectance in a solar wavelength range. The first element may define a first major surface (114, 214, 314, 414) positioned and shaped to reflect solar energy in the solar wavelength range to an energy absorber (108, 208, 308, 408, 508, 608) spaced a distance from the first major surface (114, 214, 314, 414). The energy absorber (108, 208, 308, 408, 508, 608) may be a heating panel or a photovoltaic cell. A second element may define a high thermal conductivity and thermally coupled to a second major surface (116, 216, 416) of the first element to transfer thermal energy from the second element to the first element to cool the second element.

A method for manufacturing a concentrating photovoltaic solar sub-module equipped with a reflective face having a concave predefined geometric shape, wherein it includes laminating, in a single step, a multi-layer assembly comprising in succession: a structural element equipped with a reflective first face and a second face, opposite the first; a layer of a material of good thermal conductivity, higher than that of the material from which the structural element is composed, the layer being placed on the second face of the structural element; a layer of encapsulant or of adhesive; a photovoltaic receiver, the layer of encapsulant or of adhesive being placed between the layer of a material of good thermal conductivity and the receiver; a layer made of transparent encapsulating material, covering at least the entire surface of the photovoltaic receiver; and a transparent protective layer covering the layer made of transparent encapsulating material; and during the lamination, the reflective face of the structural element is shaped by being brought into contact with a convex surface of a counter-mold, in order to obtain the reflective face of concave predefined geometric shape.

The invention relates to a parabolic trough collector comprising a parabolic, trough-shaped main reflector, preferably as a steel girder construction running holding device with a plurality of support arms for holding of the main reflector, an absorber tube, which extends along the focal line of the Main reflector extends and in which a heat transfer medium is heated, and a foundation, wherein the holding device on the foundation by a vertical axis is rotatably mounted.

The invention relates to a parabolic trough collector comprising a parabolic, trough-shaped main reflector, preferably as a steel girder construction running holding device with a plurality of support arms for holding of the main reflector, an absorber tube, which extends along the focal line of the Main reflector extends and in which a heat transfer medium is heated, and a foundation, wherein the holding device on the foundation by a vertical axis is rotatably mounted.

A rotating support device for a torsion beam is be coupled to a support pillar, especially applicable in solar power plant installations which reduces the number of parts used and facilitates the assembly. The device has a clamp which can be coupled to the support pillar having a cylindrical inner area, a bushing intended to be positioned inside the clamp and which has the possibility of rotation together with the torsion beam with respect to the clamp and a retaining part which can be coupled in the slop which in an assembly situation protrudes in height with respect to the central sector of the clamp.

Method of forecasting heat output of a solar collector. First, heat output for a plurality of solar collectors is simulated, located at respectively different geographic locations but having the same solar collector settings as the solar collector to be forecasted. The simulation is performed by calculating a dataset of theoretical heat outputs for the plurality of solar collectors, based on acquired 802 related weather data. From the calculated dataset a function is adjusted 810, the function defining the theoretical heat output of any solar collector related to its geographic location, e.g. latitude, solar Direct Normal Irradiation, DNI, and collector settings, e.g. operation temperature, and forecasting the heat output of the solar collector based on the adjusted function.

Method of forecasting heat output of a solar collector. First, heat output for a plurality of solar collectors is simulated, located at respectively different geographic locations but having the same solar collector settings as the solar collector to be forecasted. The simulation is performed by calculating a dataset of theoretical heat outputs for the plurality of solar collectors, based on acquired 802 related weather data. From the calculated dataset a function is adjusted 810, the function defining the theoretical heat output of any solar collector related to its geographic location, e.g. latitude, solar Direct Normal Irradiation, DNI, and collector settings, e.g. operation temperature, and forecasting the heat output of the solar collector based on the adjusted function.

A hybrid geothermal electrical power generation system that utilizes the heat from a deep geothermal reservoir to vaporize a working fluid, such as steam, CO.sub.2 or an organic fluid. The vaporized working fluid is used to turn a turbine connected to an electrical power generator. A solar collector may be used to increase the temperature of the working fluid during sunlight hours and a thermal storage unit may be utilized to increase the temperature of the working fluid during the night. A supercritical CO.sub.2 power generation cycle may be used alone or in combination with a steam turbine power generation cycle to utilize all of the heat energy. A vapor compression cycle, a vapor absorption cycle may be utilized to provide heating and cooling. A low temperature shallow geothermal reservoir may be used as a heat exchanger to regulate or store excess heat.

A hybrid geothermal electrical power generation system that utilizes the heat from a deep geothermal reservoir to vaporize a working fluid, such as steam, CO.sub.2 or an organic fluid. The vaporized working fluid is used to turn a turbine connected to an electrical power generator. A solar collector may be used to increase the temperature of the working fluid during sunlight hours and a thermal storage unit may be utilized to increase the temperature of the working fluid during the night. A supercritical CO.sub.2 power generation cycle may be used alone or in combination with a steam turbine power generation cycle to utilize all of the heat energy. A vapor compression cycle, a vapor absorption cycle may be utilized to provide heating and cooling. A low temperature shallow geothermal reservoir may be used as a heat exchanger to regulate or store excess heat.