A solar energy utilization system includes a solar heat collector that is mounted to a glass surface of a building from the interior and that heats a heating medium by heat energy obtained by taking in solar energy, and an inner glass that is provided on the solar heat collector on the interior side of the building and that uses the heating medium from the solar heat collector on the interior side. A far-infrared cut-off process is applied to the inner glass so that both the absorptivity and emissivity and transmittance of far-infrared rays with a wavelength of at least 9 μm to 10 μm are 20% or less.

A system for producing electricity from solar energy is provided. The system includes a window pan for installing on building such that solar radiation impinges thereon, a heat receiving element coupled to the window pan and being configured to receive heat from the solar radiation. The system further includes a gas line thermally coupled to the heat receiving element with a heat transferring member the gas line having a liquid gas being configured to evaporate by the heat generated by the heat receiving element and to increase thereby pressure in the gas line. The system further includes a turbine having a rotor configured to convert rotating motion to electricity, the turbine being configured to receive evaporated gas from the gas line and the evaporated gas is configured to rotate the motor.

A solar window system for a building includes multiple heat generation encasements each including thermoelectric sheets, where the thermoelectric sheets are positioned inside a housing having an interior metal layer. Air inside each heat generation encasement is heated by solar energy. Inside each heat generation encasement, there are pipes filled with Phase-Change Material (PCM) materials that help provide heating to the building. The solar window system further includes a storage tank on top of the system filled with PCM materials for storing heat from the heated air, the storage tank being connected to the pipes of each heat generation encasement. The solar window system includes a set of connection pipes, wherein the set of connection pipes draw cold air from an indoor space inside the building into the plurality of heat generation encasements, connect each of the heat generation encasements to at least two other heat generation encasements, and transfer the heated air from the set of heat generation encasements to the storage tank. The solar window system also includes circular movable rings that can be open and closed as needed. These rings are located around each heat generation encasement and have two movable flexible solar panels capable of generating electricity.

A solar window system for a building includes multiple heat generation encasements each including thermoelectric sheets, where the thermoelectric sheets are positioned inside a housing having an interior metal layer. Air inside each heat generation encasement is heated by solar energy. Inside each heat generation encasement, there are pipes filled with Phase-Change Material (PCM) materials that help provide heating to the building. The solar window system further includes a storage tank on top of the system filled with PCM materials for storing heat from the heated air, the storage tank being connected to the pipes of each heat generation encasement. The solar window system includes a set of connection pipes, wherein the set of connection pipes draw cold air from an indoor space inside the building into the plurality of heat generation encasements, connect each of the heat generation encasements to at least two other heat generation encasements, and transfer the heated air from the set of heat generation encasements to the storage tank. The solar window system also includes circular movable rings that can be open and closed as needed. These rings are located around each heat generation encasement and have two movable flexible solar panels capable of generating electricity.

A solar energy utilization window includes two plate members, and a first prism, and an energy collection portion, in which the energy collection portion is installed with a predetermined gap interposed between the energy collection portion and a second side of a first prism, and in a triangular prism, a refractive index and each internal angle of the triangle are set so that there are three types of optical paths of sunlight that has passed through an outer glass and entered into a first prism from the first side.

A solar energy utilization window includes two plate members, and a first prism, and an energy collection portion, in which the energy collection portion is installed with a predetermined gap interposed between the energy collection portion and a second side of a first prism, and in a triangular prism, a refractive index and each internal angle of the triangle are set so that there are three types of optical paths of sunlight that has passed through an outer glass and entered into a first prism from the first side.

A pivot window includes a laminated body. The laminated body includes two sheets of a plate material; a peripheral end member provided at a peripheral end parts of the two sheets of the plate material; and a cell array plate material which is interposed between the two sheets of the plate material and which has a plurality of cells respectively having a gas phase and encapsulating a latent heat storage material having a melting point and a freezing point in a specific temperature range. The pivot window further includes a rotation mechanism for causing the laminated body to perform at least half rotation in a vertical direction.

The light emitting structure of the present invention includes a sheet-shaped structure which absorbs excitation light and emits light with wavelength conversion and which has a maximum emission wavelength of 400 nm or more; and an antireflection material provided on a side surface of the sheet-shaped structure.

A solar window system for a building is provided. The solar window system includes multiple heat generation encasements. Air inside each heat generation encasement is heated by solar energy. The solar window system further includes a storage tank for storing heat from the heated air. The solar window system also includes a set of connection pipes, wherein the set of connection pipes draw cold air from an indoor space inside the building into the plurality of heat generation encasements, connect each of the heat generation encasements to at least two other heat generation encasements, and transfer the heated air from the set of heat generation encasements to the storage tank.

A solar window system for a building is provided. The solar window system includes multiple heat generation encasements. Air inside each heat generation encasement is heated by solar energy. The solar window system further includes a storage tank for storing heat from the heated air. The solar window system also includes a set of connection pipes, wherein the set of connection pipes draw cold air from an indoor space inside the building into the plurality of heat generation encasements, connect each of the heat generation encasements to at least two other heat generation encasements, and transfer the heated air from the set of heat generation encasements to the storage tank.