Deutsches Zentrum Fuer Luft-und Raumfahrt E.v

Robert Pitz-Paal

Bernhard Hoffschmidt

Manfred Boehmer

Peter Rietbrock

A solar receiver (1) for a solar-thermal power plant, comprising a receiver surface (2) facing towards the concentrated incident solar radiation (8) and including a plurality of mutually spaced absorber bodies (3), is provided with gas channels arranged between the absorber bodies (3) for supplying a gas or gaseous mixture (11) adapted to absorb solar radiation (8) to a region located in front of the receiver surface (2). In this region, the gas (11) will absorb a part of the incident solar radiation (8) and then will be sucked together with the ambient air (9) through the absorber bodies (3) to be further heated therein.

Solar receiver

A solar receiver (10; 110) for a solar thermal power plant comprises an elongated supply chamber (16; 118) for a heat carrier medium flowing in the supply chamber (16; 118) at a small loss of pressure, an elongated absorber (13; 113), the inlet areas (21; 119) thereof extending in a longitudinal direction and limiting the supply chamber (16; 118), and a drain chamber (18; 125) extending in a longitudinal direction and being contained in the supply chamber (16; 118) for the heated heat carrier medium and being limited by at least one outlet area (22; 124) extending in a longitudinal direction, the inlet area (21; 119) and the outlet area (22; 124) being offset against each other in a transverse direction. This is why the heat carrier medium flows in a transverse direction to the absorber (13; 113) so that the flow causing a loss of pressure is limited on a relatively short path and the heat carrier medium being heated flows towards the increasing intensity of incident radiation.

A shutter (1; 10) for regulating the fluid flow in an absorber pipe (D) of a solar-thermal power plant comprises a shutter body (2) with a central shutter opening (3) for the fluid (F) and a movable throttle element (4; 12) at least partly closing the shutter opening (3; 11). The throttle element (4) is connected to a motion element (6) that is in thermal contact with the fluid (F) and changes its shape as a function of the fluid temperature so that in case of an increased temperature of the fluid (F), the opening cross section of the shutter opening (3; 11) is enlarged, whereby the mass flow of the fluid (F) increases and the temperature thereof drops.

Growing community of inventors

Troisdorf, Germany

Robert Pitz-Paal