The present invention relates to a solar water heater (SWH) for producing hot water for domestic use, said SWH is inspired from the thermosiphon SWH to manufacture an SWH more efficient in winter and in summer. It is made up of two hot water storage tanks (17) (22) mounted in series in order to have an operating temperature as stable as possible, equipped with a guidance system for heating incoming cold water by passing through the collectors before entering the hot water storage tank (25-a) (25-b), a solar collector receiving solar radiation through its twin transparent faces (35) (36), stainless steel sheet mirrors that reflect the solar radiation applied to the collector through its rear transparent face (36) and a low energy consumption integrated circulator for gaining heat by cancelling out load losses that characterize the resistances to the passage of water in the SWH circuit (29).

The present invention relates to a solar water heater (SWH) for producing hot water for domestic use, said SWH is inspired from the thermosiphon SWH to manufacture an SWH more efficient in winter and in summer. It is made up of two hot water storage tanks (17) (22) mounted in series in order to have an operating temperature as stable as possible, equipped with a guidance system for heating incoming cold water by passing through the collectors before entering the hot water storage tank (25-a) (25-b), a solar collector receiving solar radiation through its twin transparent faces (35) (36), stainless steel sheet mirrors that reflect the solar radiation applied to the collector through its rear transparent face (36) and a low energy consumption integrated circulator for gaining heat by cancelling out load losses that characterize the resistances to the passage of water in the SWH circuit (29).

A thermal cell panel system for heating and cooling using a refrigerant includes a plurality of solar thermal cell chambers, and a piping network for a flow of the refrigerant through the plurality of solar thermal cell chambers. In addition, the system includes a compressor having a motor coupled to a variable frequency drive (“VFD”), where the compressor is coupled to the piping network upstream of the plurality of solar thermal cell chambers and the VFD is configured to adjust a speed of the motor in response to the pressure of the refrigerant within the plurality of solar thermal cell chambers. The piping network includes an inlet manifold coupled to the inlet of each solar thermal cell chamber, and an outlet manifold coupled to the outlet of each solar cell chamber.

A solar heat collector tube in which at least an infrared reflective layer, a sunlight-heat conversion layer and an anti-reflection layer are provided on the outer surface of a tube through the interior of which a heat medium can flow, wherein the infrared reflective layer in the solar heat collector tube is an Ag layer having Nb dispersed therein, the content of Nb being 0.1 at % to 31.8 at %.

A solar heat collector tube in which at least an infrared reflective layer, a sunlight-heat conversion layer and an anti-reflection layer are provided on the outer surface of a tube through the interior of which a heat medium can flow, wherein the infrared reflective layer in the solar heat collector tube is an Ag layer having Nb dispersed therein, the content of Nb being 0.1 at % to 31.8 at %.

A concentrator apparatus can include a light receiver and a light concentrator. The light concentrator can include a first concentrating lens with a first focal point on the light receiver. A first side of the first concentrating lens can be closer to the first focal point than a second side of the first concentrating lens.

A concentrator apparatus can include a light receiver and a light concentrator. The light concentrator can include a first concentrating lens with a first focal point on the light receiver. A first side of the first concentrating lens can be closer to the first focal point than a second side of the first concentrating lens.

A system for producing electricity from solar energy is provided. The system includes a solar panel for disposing such that solar radiation impinges thereon. The solar panel includes fluid pipes configured for heating fluid therein by the solar radiation. The system further includes a fluid container in fluid communication with the fluid pipes, having an inlet configured to receive heated fluid from the solar panel and an outlet configured to transfer fluid back to the solar panel; a gas line disposed in the fluid container, the gas line having a liquid gas being configured to evaporate by the heat generated by the fluid and to increase thereby pressure in the gas line; and 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.

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.

A liquid-gas heat exchanger for use in a heat exchange system using solar energy has an insulated chamber adapted to allow hot air to pass therethrough. A coil member extends through the insulated chamber and is adapted to allow a heat transfer liquid to pass into and then out of the insulated chamber. The spacing between the windings of the coil are predefined and the coil is in a predetermined position inside the insulated chamber, so as to force the air to pass in between the coil windings and increase the air contact with the coil and provide a large heat exchange. Several baffle members are placed each side of the coil member and an interior area of the insulated chamber and force air to circulate multiple times through the coil member, thereby allowing for an efficient exchange from the hot air to the heat transfer liquid. The insulated containe contains the heat exchanger which is comprised of a plurality of chambers, wherein each the plurality of chambers has a repeating pattern of shapes wherein each of the chamber of th plurality of chambers consists of one deflector which deflector being opposite to another deflector, which other deflector is a mirror image of its opposite deflector but shifted approximately half a the wall length. Each of the deflectors is defined by a specific sequence of components starting with a rounded wall from which extends a shear barrier and the wall is terminated by a diverter.