Trough collector for a solar power plant

Abstract

A pressure cell (25) of a trough collector (1) for solar power plants comprises an absorber pipe (42) for a heat-carrying fluid and also a secondary concentrator which is likewise arranged in the pressure cell (25). The pressure cell (25) thus can be reduced in height, which eliminates the need for reinforcements in the form of a framework structure for the pressure cell (25), which are otherwise required.

Description

technical field [0001] The invention relates to a trough collector for a solar power plant according to the preamble of claim 1 . Background technique [0002] For some time now, solar thermal power plants have been able to produce electricity on an industrial scale at a price comparable to that of photovoltaics, which is close to that of conventionally produced electricity, which is common today. [0003] In solar thermal power plants, the sun's radiation is reflected by means of concentrators, passed through collectors and focused in a directed manner where high temperatures are generated. The accumulated thermal energy can be taken away and used to run a heat engine, such as a turbine, which in turn drives a generator to generate electricity. [0004] Currently used solar thermal power plants include three basic forms: dish / Stella (isothermal and constant volume) system, solar tower power generation device system and parabolic trough system. [0005] The parabolic troug...

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Problems solved by technology

[0019] As an alternative to the biconvex structure, it is also possible to use a structure in which the transparent membrane is replaced by a fixed (transparent) plate oriented perpendicular to the incident sunlight, which has the advantage that virtually no The solar radiation is reflected, the disadvantage of which is the increased cost of the trough collector, the advantages when using membranes (lightweight construction also allows a more favorable structure of the collector frame, etc.) are lost again at least to some extent

[0020] In addition, those skilled in the art can determine that the disclosed embodiment is also a biconvex or lenticular structure, which actually still has a considerable height, because its focal line area is located inside the pressure sensor, so the energy gathering The rather small radius of curvature of the collector results in a rather large pressure sensor volume for a trough collector with a width of 5 or 10m

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