Embodiments herein provide a solar appliance. The solar appliance comprises an outer shell and an inner shell having at least one platform for placing one or more containers. Each of the inner shell and the outer shell are made of a preselected material. The inner shell is configured for receiving the sunlight for heating content inside the one or more containers. The solar appliance further comprises a gap provision provided between the outer shell and the inner shell for allowing a circulation of a medium. The medium insulates the inner shell and conserves the heat inside the inner shell.

Embodiments herein provide a solar appliance. The solar appliance comprises an outer shell and an inner shell having at least one platform for placing one or more containers. Each of the inner shell and the outer shell are made of a preselected material. The inner shell is configured for receiving the sunlight for heating content inside the one or more containers. The solar appliance further comprises a gap provision provided between the outer shell and the inner shell for allowing a circulation of a medium. The medium insulates the inner shell and conserves the heat inside the inner shell.

A system includes an evacuated tube solar adsorption heat pump (ETSAHP) module. The ETSAHP module includes a transparent or semi-transparent tube configured to receive heat input from solar energy, the tube having a hollow interior, a top section, and a bottom section opposite the top section, an adsorbent bed comprising a plurality of adsorbent beads and positioned at the top section of the tube and configured to absorb solar energy, an adsorbent bed cage configured to contain the adsorbent bed at the top section of the tube, a threshold configured to stabilize the adsorbent container within the tube, and a condenser/evaporator positioned at the bottom section of the tube and spaced apart from the adsorbent bed.

A method for introducing a protective gas into an annular space of a receiver tube, in particular for solar collectors, is provided where the annular space is formed at least by one outer cladding tube and an inner absorber tube of the receiver tube and the outer cladding tube is connected to the absorber tube by a wall. The method includes producing an opening that penetrates the cladding tube or the wall, introducing protective gas through the opening into the annular space, and subsequently closing the opening.

A method for introducing a protective gas into an annular space of a receiver tube, in particular for solar collectors, is provided where the annular space is formed at least by one outer cladding tube and an inner absorber tube of the receiver tube and the outer cladding tube is connected to the absorber tube by a wall. The method includes producing an opening that penetrates the cladding tube or the wall, introducing protective gas through the opening into the annular space, and subsequently closing the opening.

An energy collector is disclosed. The energy collector contains an absorber and a working fluid. The working fluid is held in a state of two-phase equilibrium to minimize sensible heating and thus heat losses to the environment. The energy collector may be held under a vacuum to further prevent heat losses to the ambient environment. One or more energy collectors may be connected to other energy collectors, end uses, or thermal energy storage.

An energy collector is disclosed. The energy collector contains an absorber and a working fluid. The working fluid is held in a state of two-phase equilibrium to minimize sensible heating and thus heat losses to the environment. The energy collector may be held under a vacuum to further prevent heat losses to the ambient environment. One or more energy collectors may be connected to other energy collectors, end uses, or thermal energy storage.

A solar thermal absorber element (100) includes a cover glass (110) and a highly selective vacuum coated roll-bond absorber (120) including heat transport tubes (126). The element further including a thermoplastic sealing (130) configured to attach the cover glass and the roll-bond absorber to each other so that there is a distance (h) between the cover glass and the roll-bond absorber, and a sealed space (134), which is formed by the cover glass, the roll-bond absorber, and the thermoplastic sealing and which is filled up with a low thermal conductive gas (136).

A solar thermal absorber element (100) includes a cover glass (110) and a highly selective vacuum coated roll-bond absorber (120) including heat transport tubes (126). The element further including a thermoplastic sealing (130) configured to attach the cover glass and the roll-bond absorber to each other so that there is a distance (h) between the cover glass and the roll-bond absorber, and a sealed space (134), which is formed by the cover glass, the roll-bond absorber, and the thermoplastic sealing and which is filled up with a low thermal conductive gas (136).

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.