摘要:
A method of generating steam by heating water in a steam generator comprising a plurality of steam generating channels, wherein water is supplied at a constant rate to each steam generating channel through respective water supply lines, and wherein a sufficient pressure drop is provided across each water supply line in order to prevent flow reversal in the plurality of steam generating channels.
摘要:
An enclosure containing rotating blades for mechanical stirring of gaseous fluids may be a heat exchanger, flue gas energy recovery device, gas generator or combustion device. A high rotational stirring velocity increases the convective heat transfer rate, rendering it independent of the lower throughput velocity of primary fluid which can be controlled independently of the stirring speed. Primary fluid is isolated from a secondary fluid by a thermal transfer surface which is continuously swept by the swirling primary fluid and which may be the peripheral wall of the enclosure or a flow tube located proximate the peripheral wall. In one embodiment, swirling is achieved by radially-extending blade assemblies secured to a rotatable shaft at longitudinally spaced locations to establish discrete swirling zones in which fluid recirculates from the shaft outwardly, along the wall, and back toward the shaft. In another embodiment, the blades extend longitudinally, proximate the peripheral wall, from peripheries of horizontal discs which rotate with the shaft. In this embodiment, primary fluid follows a restricted helical path, maintaining continuous contact with the thermal transfer surface, away from the shaft. Either embodiment may be converted to a combustion system by igniting primary fluid in the presence of admitted air. In all embodiments, recirculation of primary fluid condensate, injected water or additive optimizes heat transfer via latent heat of vaporization and dropwise condensation. Blade rotary speed may be varied to commonly or independently control: combustion fuel and air flow; primary fluid flow; and stirring energy.
摘要:
A crankshaft (280) has a non-homogenous structure is unitarily formed in a powder metallurgy process with at least two different metallic (32) constituents providing dissimilar characteristics at discrete locations of the structure.
摘要:
Die vorliegende Erfindung betrifft ein Flammrohr für Großwasserraumkessel und dergleichen, bestehend aus einem Rohr (1) mit gewellt ausgebildeter Wandung (2), dadurch gekennzeichnet, daß der Quotient (t/w) von Wellenteilung (t) zur Wellentiefe (w) ≤ 2,0 ist. Weiter betrifft die Erfindung ein Verfahren zur Fertigung derartiger Flammrohre, wobei während der Ausbildung der Vertiefung kontrolliert ein hoher axialer Schub in Richtung der Längsachse des Rohres (1) auf das Rohr (1) ausgeübt wird, der eine Materialstauchung im Umformungsbereich bewirkt.
摘要:
Disclosed herein is a method for generating steam, comprising oxidizing a fuel to generate heat via a flameless reaction; and using the heat generated via the reaction to convert water to steam. In an embodiment, the amount of NOx present is flue gas from the reaction is less than about 10 PPMv. In an embodiment, the reaction temperature is less than about 2600 °F (1430 °C). In an embodiment, the method further comprises controlling the reaction temperature to minimize the formation of NOx. In an embodiment, controlling the reaction temperature further comprises sensing one or more process variables and adjusting a process controller in response to the sensed process variable. Also disclosed herein is a steam generator comprising a reaction zone wherein fuel is oxidized to generate heat via a flameless reaction and a heasting zone wherein water is converted to steam via heat from the reaction.
摘要:
Bei einem Verfahren und einer Feuerungsanlage zur Verbrennung von flüssigen oder gasförmigen Brennstoffen werden die Verbrennungsgase im Kessel (1) zwischen einer wärmestrahlenden Fläche (8; 3) und einer gekühlten konvektiven Wärmetauscherfläche (6; 12) geführt. Hierdurch geben die Verbrennungsgase ihre Wärmeenergie über die Wärmetauscherflächen an einen Wärmeträger ab und nehmen gleichzeitig Wärme von den wärmestrahlenden Flächen, insbesondere einer Feuerraumwandung und von einem Flammenrohr (3) auf. Hierdurch werden niedrige Verbrennungsgastemperaturen und somit Kondensatausfall und Korrosionen vermieden.
摘要:
A solar collector (2) associated with or incorporated in a heat sink (4), such as a concrete slab, powers an organic Rankine cycle heat engine. Preferably, the working fluid can be heated by a second heat source, derived from biomass or waste incineration for example, after the heat sink (4) has cooled down.