A solar collector housing that is opened and closed without tools includes structure for accommodating temperature-related expansion and contraction of a polymer absorber housed within the collector. The housing includes a transparent cover, a frame for holding the transparent cover, and a base. The cover, frame and base collectively define a hollow interior within which the polymer absorber is positioned. A plurality of latches is secured to an exterior of the frame. The frame and base are pivotally connected to one another when the latches are open so that the collector housing can be opened. The housing cannot be opened when the latches are closed. A pair of variable gate closure components are positioned in slots formed in a second end of the collector and enable the polymer absorber to expand and contract without placing stress on the absorber tubes.

A solar collector housing that is opened and closed without tools includes structure for accommodating temperature-related expansion and contraction of a polymer absorber housed within the collector. The housing includes a transparent cover, a frame for holding the transparent cover, and a base. The cover, frame and base collectively define a hollow interior within which the polymer absorber is positioned. A plurality of latches is secured to an exterior of the frame. The frame and base are pivotally connected to one another when the latches are open so that the collector housing can be opened. The housing cannot be opened when the latches are closed. A pair of variable gate closure components are positioned in slots formed in a second end of the collector and enable the polymer absorber to expand and contract without placing stress on the absorber tubes.

The invention relates to a product for heating comprising at least one heating unit (2), which comprises a base material layer with an emission reducing structure on top of said an energy converting structure, combined together to form a selective absorber layer on at least one of the sides of the base material layer, at least one insulation layer (4, 5, 6, 7) of transparent flexible material located on the heating unit (2), which heating unit and the at least one insulation layer on the heating unit (2) of the product (1) are attached to each other air-tightly on the sides such that between at least some of the layers at least one closed air pocket (10, 11) is formed, characterized in that the content to be heated by the product is located below to the base material of the heating unit of the product (1), that temperature of the content of the product (1) will be 90 C.-160 C., as result of the placing the product (1) exposed to radiation of selected wavelengths, and that the energy converting structure in the selective absorber layer has an absorption factor (aS) of a minimum of 0.9 and the emission reducing structure has an emission factor (E) of a maximum of 0.1 and that ratio between the absorption factor (aS) and the emission factor (E) is equal or higher than 9 and that when the selective absorber is exposed to wavelengths ranging from 350 nm to 4000 nm, the energy converting structure converts the wavelengths to thermal energy ranging from 4000 nm to 40.000 nm and the emission of thermal energy is reduced by the emission reducing structure and the contained energy is being used for heating the content of the product (1).

A method for improving the efficiency of a solar heating system based on absorbing heat from solar radiation into the outer surface of a concrete wall. The heat transfer device makes use of a fluid in a tube system to transfer heat from the outside of the wall to the inside of the wall. The inside wall is then used to heat air that is passed over it, and that air is then used to heat up a heat storage system.

A Multiple Bifacial Photovoltaic Transparent Panels Thermal Triangles Reflective Minors Ensemble system which is configured to be oriented towards the sun and relative to the horizon, the mirrors reflecting the sunray to the bifacial PV panels front, back and underside faces. There is a plurality of rhombus or trapeze shaped sunray path openings, mounted on a small footprint, above a two axes tracking mechanism. Further, an Micro-Electric Power Station MEPS capable of obtaining energy from a plurality of Rear/Back and side sun ray reflectors sources, located in between various bifacial photovoltaic transparent solar thermal panels. The reflector sources may include an integrated laminated mirror film around the inside of a casing/envelope of a rhombus thin (e.g. glass) box or of transparent sunrays magnifying concentrator envelope balloon. The MEPS facility may be mounted above streets and traffic junctions, on a structure which may be referred to as Micro-Grid Electric Pylons MGEP.

A concentrator tube comprises a reflector portion having two walls; and an aperture closing an opening to the reflector portion. The aperture and the reflector portion extend longitudinally. The aperture is substantially flat relative to curvature of the reflector portion.

An improvised Solar Concentrator and Absorber/Receiver Subsystem using a Dual-Stage Parabolic Concentrator for Concentrating Solar Power (CSP) (Thermal) system comprises of two parabolic mirrored reflectors wherein their apertures face each other with their focal point/line and axes coincides with each other, a plurality of absorber tubes/cavities placed on the non-reflecting side of the primary and/or secondary reflectors to carry heat transfer fluid, combined with relevant mechanisms to prevent/minimize thermal loss, mounted on a Sun tracking mechanism. For Concentrating Photovoltaic (CPV) and Concentrating Hybrid Thermo-Photovoltaic (CHTPV) Systems, all or a portion of the reflectors' reflecting and/or exterior surfaces would be covered or substituted with suitable photovoltaic panels.

A device for supplying cold energy, heat energy and electrical energy by efficiently converting renewable deep-space energies includes a solar-energy conversion device, a radiation refrigeration device, a rotary bracket, a dip-angle adjustment component, and a support base. The solar-energy conversion device and the radiation refrigeration device are connected to the rotary bracket in a mutually perpendicular manner, and the rotary bracket is connected to the dip-angle adjustment component which is connected to the support base. The dip-angle adjustment component is configured to adjust a dip angle between the rotary bracket and a horizontal plane, and the rotary bracket is configured to drive the solar-energy conversion device and the radiation refrigeration device to rotate, such that a sunward side of the solar-energy conversion device is always perpendicular to light rays irradiated by the sun, and a reflective surface of the radiation refrigeration device is always parallel to the light rays.

A method includes coupling a number of sets of N and P thermoelectric legs to a substrate. Each set includes an N thermoelectric leg and a P thermoelectric leg electrically contacting each other through a conductive material on the substrate. The method also includes forming a conductive thin film on another substrate, and coupling the each set on an end thereof away from the substrate to the conductive thin film formed on the another substrate through a pin several times longer than a height of the N thermoelectric leg and the P thermoelectric leg of the each set to form a thermoelectric device.

A transparent sheet includes a texture in relief on a first of its main faces, such that, if n is the refractive index of the material including the texture, P.sub.m is the mean slope in degrees of the textured face and Y(q) is the percentage of the textured surface with a slope greater than q/(n1) in degrees, then the two cumulative conditions exist: Y(q)>3%+f(q)%.P.sub.m.(n1) and Y(q)>10%, with f(q)=24(3.q) and q=2 or 3.