Siemens Aktiengesellschaft

Joachim Brodesser

Martin Effert

Tobias Schulze

Jan Brückner

Frank Thomas

Joachim Franke

Gerhard Zimmermann

Gerhard Schlund

Jürgen Birnbaum

A steam generator is provided. The steam generator has a combustion chamber having a peripheral wall formed at least partially from gas-proof, welded steam generator pipes, at least two additional inner walls formed at least partially from additional steam generator pipes which are arranged inside the combustion chamber. The inner walls are connected one behind the other on the flow medium side by an intermediate collector. The steam generator has a high service life and is reliable. The flow medium on the inlet of the inner wall upstream of the intermediate collector has a lower temperature than that of the flow medium on an inlet of the peripheral wall.

Steam generator

A continuous flow steam generator includes a combustion chamber, having substantially rectangular cross-section and a lower and upper combustion chamber region, and has a horizontal gas pass connected downstream of the combustion chamber on the flue-gas side. Gas-tight and gas-permeable peripheral walls of the generator are completely or partly made of steam generator pipes welded together and through which a flow medium can flow, and collectors are arranged and connected to the steam generator pipes such that groups of steam generator pipes connected in parallel form heating surface segments of the peripheral walls. First passage collectors are arranged and connected such that the flow medium from first heating surface segments of two parallel first peripheral walls of the lower combustion chamber region are mixed with the fluid medium from second heating surface segments of second peripheral walls, standing perpendicular to the first peripheral walls, of the upper combustion chamber region.

Continuous flow steam generator with a two-pass boiler design

A once-through steam generator includes a combustion chamber, the walls of which comprise vertically arranged evaporator pipes connected to one another in gas-tight fashion by pipe webs, through which evaporator pipes flows a flow medium from bottom to top. The evaporator pipes are combined by upstream inlet collectors to form more intensely and less intensely heated pipe groups. A feed water supply is assigned to respective inlet collectors. At least one regulating valve regulates throttling of the mass flow of the flow medium into the evaporator pipes. To determine a control variable for the regulating valve, temperature measurement device measures outlet temperatures of the flow medium exiting the evaporator pipes. Each of the more intensely and less intensely heated pipe groups is assigned to one of the inlet collectors and to an outlet collector, and each of the outlet collectors has one of the temperature measurement devices.

Once-through steam generator

A method for operating a directly heated, solar-thermal steam generator is provided. As per the method, a nominal value {dot over (M)}for the supply water mass flow {dot over (M)} is conducted to an apparatus for adjusting the supply water mass flow {dot over (M)} wherein, at the adjustment of the nominal value {dot over (M)}for the supply water mass flow {dot over (M)}, account is taken of a correction value K, by which the thermal effects of storage or withdrawal of thermal energy in an evaporator are corrected.

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Nuremberg, Germany

Joachim Brodesser