A transparent solar heat absorbing apparatus includes a transparent member allowing sunlight to pass through, a wavelength selective member disposed beneath the transparent member, a heating tank formed between the transparent member and the wavelength selective member. The wavelength selective member allows light in a transmission range including at least a visible wavelength range to pass through and reflects light in a reflection range including at least an infrared wavelength range. At least one of the transparent member and the wavelength selective member has a waveform structure on at least one of its upper surface and bottom surface.

A solar thermal collector and an accessory structure of a building are provided. The solar thermal collector includes at least one heat absorbing plate and at least one heat insulating plate. Each of the heat absorbing plate includes at least one first slab and first engaging parts connected with the first slab. Each of the heat insulating plate includes at least one second slab and second engaging parts connected with the second slab. The first engaging parts are respectively engaged with the second engaging parts, and a gap is maintained between the first slab and the second slab to define a heat collecting channel, through which a heat transfer fluid flows between the heat absorbing plate and the heat insulating plate. A heat conductivity of the heat absorbing plate is at least 30 times greater than a heat conductivity of the heat insulating plate.

The invention relates to a holding device (1) for a solar panel (2) on a parapet (3) of a balcony, said device having at least the following components: —a connection arrangement (4) for connecting an element to be held, wherein the connection arrangement has at least one support (5, 6, 7, 8) for placing on a parapet; and —at least one transverse strut (9, 10) for bridging a parapet width, wherein the at least one transverse strut is connected to the connection arrangement and has at least one flange (12, 13) for placing on a parapet, wherein by means of a movement of the at least one flange towards the connection arrangement, the at least one flange and the at least one support press in opposite directions against the parapet. The invention disclosed relates to a holding device which allows for greater flexibility with regard to the structure of a balcony parapet.

A water cooling and heating system for swimming pools and hot tubs for heating and/or cooling a flow of water drawn from a body of water and then returning the heated and/or cooled flow of water back to the body of water wherein the system includes an inner conduit within an outer conduit, the outer conduit having an exterior conduit surface that is exposed to solar energy from the sun whereby a portion of the solar energy absorbed by the outer conduit is transferred to and heats an outer water flow within the outer conduit and the outer water flow in the outer conduit heating an inner water flow of water in the inner conduit, the system further including at least one control valve to selectively control a flow of water to the inner and outer conduits and a bypass flow of water that is directed back toward the body of water.

A water cooling and heating system for swimming pools and hot tubs for heating and/or cooling a flow of water drawn from a body of water and then returning the heated and/or cooled flow of water back to the body of water wherein the system includes an inner conduit within an outer conduit, the outer conduit having an exterior conduit surface that is exposed to solar energy from the sun whereby a portion of the solar energy absorbed by the outer conduit is transferred to and heats an outer water flow within the outer conduit and the outer water flow in the outer conduit heating an inner water flow of water in the inner conduit, the system further including at least one control valve to selectively control a flow of water to the inner and outer conduits and a bypass flow of water that is directed back toward the body of water.

A solar collector adapted to absorb thermal heating from the sun, wherein said solar collector comprises hollow sections adapted to house a medium. The solar collector is a self-supporting composite solar collector produced from a composite material constituted of at least a first and second material, wherein said first and second materials have equal or substantially equal coefficients of elasticity.

A solar collector adapted to absorb thermal heating from the sun, wherein said solar collector comprises hollow sections adapted to house a medium. The solar collector is a self-supporting composite solar collector produced from a composite material constituted of at least a first and second material, wherein said first and second materials have equal or substantially equal coefficients of elasticity.

A solar thermal collector and an accessory structure of a building are provided. The solar thermal collector includes at least one heat absorbing plate and at least one heat insulating plate. Each of the heat absorbing plate includes at least one first slab and first engaging parts connected with the first slab. Each of the heat insulating plate includes at least one second slab and second engaging parts connected with the second slab. The first engaging parts are respectively engaged with the second engaging parts, and a gap is maintained between the first slab and the second slab to define a heat collecting channel, through which a heat transfer medium flows between the heat absorbing plate and the heat insulating plate. A heat conductivity of the heat absorbing plate is at least 30 times greater than a heat conductivity of the heat insulating plate.

A solar thermal collector and an accessory structure of a building are provided. The solar thermal collector includes at least one heat absorbing plate and at least one heat insulating plate. Each of the heat absorbing plate includes at least one first slab and first engaging parts connected with the first slab. Each of the heat insulating plate includes at least one second slab and second engaging parts connected with the second slab. The first engaging parts are respectively engaged with the second engaging parts, and a gap is maintained between the first slab and the second slab to define a heat collecting channel, through which a heat transfer medium flows between the heat absorbing plate and the heat insulating plate. A heat conductivity of the heat absorbing plate is at least 30 times greater than a heat conductivity of the heat insulating plate.

The invention relates to a holding device (1) for a solar panel (2) on a parapet (3) of a balcony, said device having at least the following components: a connection arrangement (4) for connecting an element to be held, wherein the connection arrangement has at least one support (5, 6, 7, 8) for placing on a parapet; and at least one transverse strut (9, 10) for bridging a parapet width, wherein the at least one transverse strut is connected to the connection arrangement and has at least one flange (12, 13) for placing on a parapet, wherein by means of a movement of the at least one flange towards the connection arrangement, the at least one flange and the at least one support press in opposite directions against the parapet. The invention disclosed relates to a holding device which allows for greater flexibility with regard to the structure of a balcony parapet.