Abstract: A light absorbing unit for heating at least one liquid medium by solar energy includes a transparent surface layer including a channel configuration inside of which liquid medium can be streamed for heating. A light absorbing device is configured to contain the channel configuration. The light absorbing unit is configured to constitute an integrated part in a roof construction. The transparent surface layer includes roofing tiles transparently arranged to be supported by means of a batten. The batten is arranged to constitute a part of the light absorbing unit in the roof construction. The batten is arranged to be applied in the roof construction with the light absorbing unit. The batten is arranged to be supported along a long side of the light absorbing unit extending substantially horizontally in the roof construction.

Abstract: A light absorbing device for heating a medium by means of solar energy, comprising a first and second layer of which at least one is intended for solar energy absorption, forming a space there between in which a first medium is arranged to flow for said heating, and means arranged to allow said flowing, wherein at least one of said layers is flexible such that the surface exposed for solar energy absorption is reducible. The invention also relates to an at least partly flexible building construction.

Abstract: The present invention relates to a light absorbing device which comprises an transparent outer material layer, a space through which air is circulated and heated by light radiation passing through the outer the material layer, a radiation absorbing material layer, and an element which is adapted to divide the space in at least a first subspace, which comprises a first opening, and a second subspace, which comprises a second opening. The air is adapted to flow along a path having an extension from the first opening to the second opening. The path comprises flow resistance reducing means in at least one portion of the space which is adapted to reduce the flow resistance for the gaseous medium when it is guided through said portion of the space.

Abstract: The present invention relates to an arrangement for generating electric energy. The arrangement comprises a light absorbing device comprising a gaseous medium adapted to be circulated by means of natural circulation and heated by incident light radiation and an energy transforming device adapted to absorb heat energy from the gaseous medium and to transfer the absorbed heat energy to electric energy.

Abstract: The present invention relates to a light absorbing device which comprises an transparent outer material layer, a space through which air is circulated and heated by light radiation passing through the outer the material layer, a radiation absorbing material layer, and an element which is adapted to divide the space in at least a first subspace, which comprises a first opening, and a second subspace, which comprises a second opening. The air is adapted to flow along a path having an extension from the first opening to the second opening. The path comprises flow resistance reducing means in at least one portion of the space which is adapted to reduce the flow resistance for the gaseous medium when it is guided through said portion of the space.

Abstract: A water purifier which works in accordance with the membrane distillation principle includes a degassor for degassing incoming crude water prior to commencing the membrane distillation precess; a membrane for the membrane distillation of degassed water; and an outlet which functions to discharge a residual quantity of degassed undistilled water when a degassed undistilled water level has fallen to a predetermined lower level in a container which receives the crude water to be purified. The container is provided with an upper level sensor and a lower level sensor and a temperature sensor. The upper level sensor functions to activate the start of circulator for the circulation of crude water through the degassor, and also to activate the start of crude water heater. When the level of water in the container falls, the lower level sensor functions to activate opening of the outlet means so as to discharge remaining undistilled water.