Abstract: A heat exchanger of flooded type, having: a primary tube bundle, inside which a first “hot” operating fluid to be cooled down flows; a skirt, circumscribed to the primary tube bundle, which receives a second “cold” operation fluid which laps against the primary tube bundle in order to subtract heat to the first operating fluid, which second operating fluid flows inside the skirt along to a vertical longitudinal direction orthogonal to the development of the tubes of the primary tube bundle, and wherein the skirt has a prevalent development dimension (L) along the flow longitudinal direction of the second operating fluid; and nozzles for delivering the secondary operating fluid inside the skirt, wherein an alternative configuration is provided using only the second operating fluid flooding the skirt by entering from a side inlet, without the presence of the above-mentioned nozzles, and an additional configuration using only the nozzles but not such side inlet.

Abstract: A fabric treatment appliance according to one embodiment of the invention comprises a receptacle defining a fabric treatment chamber for receiving laundry, a steam generator having an inlet for receiving water from a water supply and an outlet for supplying steam to the fabric treatment chamber, and a liquid trap upstream from the steam generation chamber blocking backflow of steam from the steam generation chamber to the water supply conduit.

Abstract: The present invention provides a secondary heat production device (5) for fitting to a closed circuit thermodynamic system associating main heat production means (1) operating by compressing a fluid and a heat exchanger (2) that are interconnected by a fluid flow channel (3). The device (5) is mainly constituted by a plurality of individual channels (8, 9) interposed between an inlet chamber (11) and an outlet chamber (13), each of the chambers (11, 13) including a respective inlet or outlet pipe (10, 12) on a common axis and presenting respective identical main sections corresponding to the total section of the individual channels (8, 9).

Abstract: A forced-flow steam generator includes first and second steam generator pipes which form a surrounding wall, wherein the first and second steam generator pipes are welded in a gas-tight fashion and are traversable by flow in a vertical direction. A passage collector is arranged within the surrounding wall, wherein the passage collector connects the first steam generator pipes with the second steam generator pipes. The first steam generator pipes are connected at an outlet side to an inlet side of the second steam generator pipes, wherein the second steam generator pipes are connected in series with the first steam generator pipes. Each of the second generator pipes has a restrictor device. Further, a power plant with a forced-flow steam generator is provided.

Abstract: A fluid recirculation system includes an arrangement of a flow control valve located to receive a flow of fluid from an inlet. The system further comprises an economizer inlet mixing device located to receive the flow of hotter fluid from the arrangement of the flow control valve and from a cooler feedwater stream. An economizer inlet mixing device located upstream of an economizer in a supercritical pressure boiler includes a sparger assembly through which a flow of fluid from the waterwall outlet is received, an inlet through which a flow of fluid from a feed stream is received, and a wave breaker assembly through which an outlet stream from the economizer inlet mixing device is directed.

Abstract: A boiler apparatus for leading fluid from a plurality of upper walls (2) to (4) to a ceiling wall (7) through a ceiling wall inlet header (11), characterized in that a ceiling wall inlet mixing header (8) is installed between the plurality of upper walls (2) to (4) and the ceiling wall inlet header (11).

Abstract: A steam generator circulation system is provided and includes a boiler feed pump for forcing water through an economizer, and through the waterwall tubes of an evaporator. A separator receives a mixture of steam and water and sends the steam to a steam utilization unit such as a superheater. A valve is provided below the separator. If the valve is open, the saturated water from the separator is mixed with feedwater and recirculated through the tubes of the evaporator. If the valve is closed, recirculation is terminated. At loads below the critical point, the valve below the separator system would be open and the boiler would operate like a natural circulation drum boiler. At loads above the critical point, the valve below the separator system would be closed resulting in a boiler that operates like a once-through boiler.

Abstract: The invention relates to a heat-recovery boiler (3) consisting of a tube bundle heat exchanger (7) which is incorporated into a pressure vessel (2) downstream of a gasification device. Displacement bodies (9) are inserted into pipes which are flowed around by hot process gas. According to said invention, in order to avoid corrosion problems like metal dusting, said displacement bodies (9) are made of graphite.

Abstract: A direct-fired steam generator system is used in conjunction with a baler for providing steam for re-hydrating the crop being baled. Cooling water is pumped through water jackets defined by double walls surrounding the combustion chamber and adjacent components, with this water being routed exteriorly of the water jackets and back to a three-way water control valve provided for normally routing the water back to the cooling water reservoir. The control valve is selectively actuated to couple the returning water to an injector flange for metering the water into an outlet end of the combustion chamber only when a flame is present or soon to be present in the combustion chamber, whereby the water will come into contact with hot combustion gases and be changed to steam which is routed on to be applied to the crop being baled.

Abstract: A steam generator has a nitrogen removal device for fuel gas and a combustion chamber, which is followed on the fuel-gas side, via a horizontal gas flue and a vertical gas flue, by a nitrogen removal device for the fuel gas. The steam generator has a particularly low space requirement and ensures a reliable removal of nitrogen from the fuel gases of the fossil fuel. For this purpose, the combustion chamber has a number of burners arranged level with the horizontal gas flue. Moreover, the vertical gas flue is designed for substantially vertical flow of the fuel gas from the bottom upward, and the nitrogen removal device for fuel gas is designed for an substantially vertical flow of the fuel gas from the top downward.

Abstract: A steam generator for converting water to steam by the transfer of heat from a heating medium includes two or more water/steam circuits. Each water/steam circuit has at least one evaporator for transferring the heat from the heating medium to the water. A single water/steam drum receives steam or water and steam from the evaporators. A descending pipe has at least one bypass, from which the supply pipes of the respective water/steam circuits branch off, and a venturi device in the area of the bypass. The inlet opening of the supply pipe of at least one water/steam circuit is disposed in the area of diffuser-shaped outlet of the venturi device such that the supply pipe section acts as a dynamic compression pipe in order to increase the pressure of the working medium in this circuit.

Abstract: The fossil fuel fired continuous-flow steam generator has a gas turbine combustion chamber for fossil combustibles. On the heating gas side a vertical gas extractor is mounted downstream of a horizontal gas extractor. The walls surrounding the combustion chamber are composed of vertical evaporator tubes that are welded together. During operation the temperature differences between adjacent evaporator tubes of the combustion chamber are kept as low as possible. The burners are arranged at the level of the horizontal gas extractor. For a number of evaporator tubes which can be simultaneously impinged by the flow medium the ratio of the steam generating capacity M (in kg/s) at full load and of the sum A (in m2) of the inner cross-sectional surfaces of the same evaporator tubes is less than 1350 (in kg/sm2).

Abstract: The invention relates to a method of heating a liquid medium by means of a first thermal system (2, 3, 4, 7, 12, 13) and at least one second thermal system (5, 6, 6A, 15, 16) following said first thermal system (2, 3, 4, 7, 12, 13), which thermal systems each have at least one heat exchanger (2, 5) through which the medium flows, and which second thermal system (5, 6, 6A, 15, 16) is operated at a higher temperature level than the first thermal system (2, 3, 4, 7, 12, 13). The method is characterized in that, for the accelerated raising of the temperature of the medium in the first thermal system (2, 3, 4, 7, 12, 13), the direct feed of the medium to the same is reduced and in the extreme case prevented, and in that medium flowing through the first thermal system (2, 3, 4, 7, 12, 13) is directed in a circuit. The invention also relates to a plant for carrying out the method.

Abstract: A vaporizer for vaporizing liquid anesthetic has a chamber for liquid anesthetic, a gas flow passage, a throttle in the gas flow passage, a first connection between the chamber and the gas flow passage upstream from the throttle and a second connection between the chamber and the gas flow passage downstream from the throttle. The vaporizer is more accurate and usable with different liquid anesthetics by having an outlet valve arranged by an outlet in the vaporizer, this outlet valve being regulated by the pressure upstream from the throttle.

Abstract: In heat generators and burners, it is frequently necessary to realize discontinuous cross-sectional expansions of a flow duct. When the flow (U) passes over the step (10) formed in the wall (8) of the flow duct, coherent lateral separation vortices form which are propagated almost undamped downstream of the step and frequently represent the cause of thermo-acoustic vibrations of high amplitude. In accordance with the invention, vortex-generating elements (20) with a lateral pitch dimension (t) are arranged on a line transverse to the main flow (U) a distance (s) upstream of the step (10). Given an expedient selection of the pitch dimension (t), the lateral coherence of the separation vortex is enduringly destroyed.