Abstract: An arrangement for producing hot water from solar energy, the arrangement comprising: an elongate solar collector device extending along a longitudinal direction (X) from a first end to an opposite second end, the elongate solar collector device consisting of an elongate profile having walls that in between them define elongate cavities extending from the first end to the second end, the elongate solar collector device having at least one first opening for receiving water into the elongate cavities, and at least one second opening for tapping off water, arranged at a middle part of the elongate solar collector device; and at least one valve adapted to be arranged in a respective one of the at least one second opening, the valve being openable and closable in order to be able to tap off any water housed in the cavities.

Abstract: The invention relates to a pier (10), a pier attachment system (1), a method for building the pier (10). The pier attachment system (1) is used for attaching a surface module (2) of the pier to a lower part (6) of the pier. The pier attachment system (1) comprises an attachment bracket (3), an attachment plug (4), and a surface module (2). The attachment plug (4) is adapted to extend between an aperture (21a) in a first surface module (2a) and an aperture (21b) in a second surface module (2b). The attachment bracket (3) is adapted to fasten the attachment plug (4) to a beam (5) of the lower part (6) of the pier and thereby fasten the surface modules (2) to the lower part of the pier (6).

Abstract: The invention relates to a pier (10), a pier attachment system (1), a method for building the pier (10). The pier attachment system (1) is used for attaching a surface module (2) of the pier to a lower part (6) of the pier. The pier attachment system (1) comprises an attachment bracket (3), an attachment plug (4), and a surface module (2). The attachment plug (4) is adapted to extend between an aperture (21a) in a first surface module (2a) and an aperture (21b) in a second surface module (2b). The attachment bracket (3) is adapted to fasten the attachment plug (4) to a beam (5) of the lower part (6) of the pier and thereby fasten the surface modules (2) to the lower part of the pier (6).

Abstract: 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.

Abstract: A composite storage tank module, tank, and arrangement wherein a composite storage tank module comprises at least one hollow section adapted to house a medium. The storage tank module is an elongated self-supporting structure produced from a composite material constituted of at least a first and second material. The composite storage tank module and arrangement are adapted to be embedded in a building structure, preferably a double flooring or a wall.

Abstract: 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.

Abstract: A composite storage tank module, tank, and arrangement wherein a composite storage tank module comprises at least one hollow section adapted to house a medium. The storage tank module is an elongated self-supporting structure produced from a composite material constituted of at least a first and second material. The composite storage tank module and arrangement are adapted to be embedded in a building structure, preferably a double flooring or a wall.

Abstract: Method and apparatus for manufacturing so-called sandwich structural elements in laminated materials, where a core (10) is provided with a covering layer (18) on at least one side. The core in the form of a solid or expandable material is advanced from above and downwards in a substantially vertical path, and the covering layer or layers (18) are pressed against, and joined to the core during continued vertical advance thereof from above and downwards.

Abstract: Method and apparatus for manufacturing so-called sandwich structural elements in laminated materials, where a core (10) is provided with a covering layer (18) on at least one side. The core in the form of a solid or expandable material is advanced from above and downwards in a substantially vertical path, and the covering layer or layers (18) are pressed against, and joined to the core during continued vertical advance thereof from above and downwards.

Abstract: The invention relates to an arrangement for securing a body made of an anisotropic material, the fibers of which are arranged essentially in an anticipated direction of application of a load. The arrangement consists of an outer casing made of a rigid material relative to the material of the body, into which outer casing one end of the body is capable of being introduced, and a wedge device arranged in the aforementioned direction and capable of being introduced into the aforementined end so arranged upon being introduced to cause the end of the body to expand and in so doing to force its peripheral surface against the walls of the outer casing. Characteristic features of the invention are that the moduli of elasticity, E.sub.ij, the moduli of shearing, G.sub.ij, and the indices of transverse contraction, V.sub.ij, of the wedge are substantially identical with those of the body in the longitudinal and transverse directions and in thickness.

Abstract: A method and device are described for measuring a change in the mechanical state aiming at detecting the disturbance the change in state has on a magnetic flux (.phi.). This flux is brought to flow through at least a part of the body (1) under the influence of a driving magnetizing force (H.sub.0).In order to achieve an unambiguous measuring result the average length (l) of the magnetic circuit is kept constant and independent of the change in the mechanical state. The flux (.phi.) consists partly of a main flux (.phi..sub.0) having a definite direction and being of such a magnitude that the magnetic properties of the body depart from the region of irreversibility and partly of an alternating, gradually vanishing flux (.phi..sub.v) superimposed upon the main flux. The alternating flux must have such an initial magnitude that saturation is obtained in both directions of the alternating flux (.phi..sub.v). After the vanishing of the alternating flux (.phi..sub.