Abstract: A gas cleaning unit for cleaning an effluent gas of at least one aluminium production electrolytic cell comprises a contact reactor in which the effluent gas is brought into contact with alumina, and a dust removal device for removing at least a portion of the alumina. The gas cleaning unit further comprises a wet scrubber in which the effluent gas is brought into contact with an absorption liquid containing water for removing further pollutants from the effluent gas. The wet scrubber is positioned at a point vertically higher than that of the dust removal device.

Abstract: The invention relates to a new mechatronic circuit-breaker and its associated triggering method for breaking either alternating currents or direct currents at high voltages.

Abstract: A concentrated solar tower assembly includes a hollow tower structure defining lower and upper portions. The lower portion includes a closable opening region for configuring a closable opening, and the upper portion includes a top gird having inner and outer top grids. The assembly further includes a solar receiver steam generator entirely installed at the ground level G on the inner top grid simultaneous to erection of the tower. The generator on the inner top grid is slidingly directed within the tower from the closable opening to be entirely accommodated therewithin. Thereafter, the generator on the inner top grid is lifted for being placed along the upper portion of the tower.

Abstract: Methods are provided for assessing reliability of a power system of a utility company. At least one main overview display is obtained. Violation markers are displayed on the one main overview display. A monitored elements tab is updated with a list of monitored elements.

Abstract: A method and apparatus or system is provided for cleaning a flue gas and/or cooling a flue gas with a dispersed finely divided absorption liquid. As such, the absorption liquid is dispersed in a wet scrubber through which flue gas flows for absorption liquid and flue gas intermingling and contact to produce a cleaned flue gas. The absorption liquid supplied to the wet scrubber is dispersed from upwardly spraying anti-clogging nozzles and downwardly spraying nozzles arranged to maximize absorption liquid and flue gas contact with minimal spray interference between nozzles.

Abstract: A method and a turbine part having a coating with a matrix layer that includes a high temperature resistant hydrophobic polysiloxane filler, wherein the coating has superior mechanical strength and temperature resistance.

Abstract: A power electronic converter, for connecting AC and DC networks and transferring power therebetween, comprises: first and second DC terminals for connection in use to a DC network; at least one primary converter limb extending between the first and second DC terminals and having first and second primary limb portions separated by a primary AC terminal for connection in use to a respective phase of a multi-phase AC network, at least one of the first and second primary limb portions including at least one primary active switching module to selectively allow current to flow through the corresponding primary converter limb in a first direction from the corresponding primary AC terminal to the DC terminals and in a second direction from the DC terminals to the corresponding primary AC terminal; and at least one secondary converter limb extending between the first and second DC terminals and having first and second secondary limb portions separated by a secondary AC terminal for connection in use to a further respe

Abstract: A raw gas collection system for collecting raw gas from a plurality of aluminum smelting pots is equipped with a plurality of branch ducts (28d), each of which is arranged to channel a respective branch flow (38d) of raw gas from an aluminum smelting pot to a collection duct (26A), which is common to and shared by the branch ducts (28d). Each of said branch ducts (28d) is, near an outlet (52d) thereof, equipped with a curved section (50d) for aligning the branch flow (38d) with a flow direction of raw gas (27A) already present in the common collection duct (26A), and a constriction (54d) for accelerating the branch flow (38d) through the branch duct outlet (52d) into the common collection duct (26A). Furthermore, each of said branch ducts (28d) is equipped with a heat exchanger (40d) for removing heat from the respective branch flow (38d) of raw gas.

Abstract: An apparatus for evaporating waste water and reducing gas emissions includes an evaporator device (7, 31) configured to receiving a portion of flue gas emitted from a boiler unit (1) and waste water to directly contact the flue gas with the waste water to cool and humidify the flue gas and to dry solid particulates within the waste water. In some embodiments, the waste water may be a component of a mixture formed by a mixer device (25) prior to being contacted with the flue gas to humidify and cool the flue gas and dry solids within the waste water. An alkaline reagent as well as activated carbon can be mixed with the waste water prior to the waste water contacting the flue gas. Solid particulates that are dried within the cooled and humidified flue gas can be separated from the flue gas via a particulate collector (9).

Abstract: A circuit for a hybrid voltage source converter suitable for high voltage DC power transmission and reactive power compensation. The circuit comprises an assembly of electrically interconnected elements (Elements 1 to 20) including a plurality of first elements (Elements 1 to 6) and a plurality of second elements (Elements 7 to 20). Each of the first and second elements is configurable to be bypassed, to be disconnected or to include a circuit arrangement of one or more electronic components to construct, in use, a hybrid voltage source converter including at least one first element and at least one second element and in which the circuit arrangement included in the or each first element is different to the circuit arrangement included in the or each second element.

Abstract: A converter, for use in high voltage direct and alternating current power transmission comprises a primary charge transfer converter. The charge transfer converter includes first and second primary terminals for connection to one or more electrical networks. The primary charge transfer converter also includes a plurality of charge transfer elements and a plurality of primary switching elements which are connected in a cascade circuit between the first and second primary terminals. Each charge transfer element includes at least one resonant circuit. The primary switching elements are operable to selectively cause charging and discharging of each resonant circuit to transfer charge between the charge transfer elements and thereby create a voltage difference between the first and second primary terminals.

Abstract: A support system for an equipment item on a concrete slab includes at least one raised block relative to the slab and of a single piece with the slab. The block includes a metal belt delimiting the vertical walls of the block and a metal support fastened to the belt and capping the block to receive a foot of the equipment item.

Abstract: In a solar receiver arrangement 300 with a support structure 600, the support structure 600 includes a plurality of tie members 700 for tangentially coupling a plurality of tubes 510, for forming at least one receiver panel 500, in such a manner that the at least one tie member 700 is coupled in at least one crotch portion 520 between a pair of tubes 510. The support structure 600 further includes a plurality of panel support members 800 coupled to the receiver panel 500 selectively in at least one crotch portion 520 between a pair of tubes 510. Furthermore, at least one latching member 900 is configured to detachably attach the plurality of panel support members 800 for engaging the plurality of receiver panels 500.

Abstract: The can combustion chamber includes a casing housing a plurality of cans. Each can includes a wall and a perforated cooling liner around the wall. Cooling liners of adjacent cans have staggered perforations.

Abstract: A combustor arrangement for a gas turbine includes a first burner, a first combustion chamber, a mixer for admixing a dilution gas to the gases leaving the first combustion chamber during operation, a second burner, and a second combustion chamber arranged sequentially in a fluid flow connection. These elements of the combustor arrangement are arranged in a row to form a flow path extending between the first combustion chamber and the second burner. The combustor arrangement includes acentral lance body arranged inside the flow path and extending from the first burner through the first combustion chamber into the mixer and into the second burner, wherein the lance body includes a fuel duct for providing fuel for the first burner and/or for the second burner.

Abstract: A gas cleaning system including a wet scrubber (14) for removal of sulphur dioxide from a gas and an oxidation basin system (42) for receiving effluent generated in the removal of sulphur dioxide from the process gas. The oxidation basin system (42) comprises an oxidation basin (43) for containing the effluent during treatment thereof, an oxygen supply system (47) for supplying oxygen to the effluent in the oxidation basin (43), and a contacting system for bringing the effluent into contact with an enzyme which catalyzes the oxidation of bisulphite and/or sulphite ions.

Abstract: Disclosed is a method for the improvement of the line quality in a system, in which a common feeding (1), via at least one distribution transformer (3), feeds at least two non-linear loads (11) drawing non-sinusoidal currents from the common feeding (1), wherein between the common feeding (1) and the distribution transformer (3) there is at least one primary side transformer line (2) and between the at least one distribution transformer (3) and the loads (11) there is at least one lower voltage secondary side transformer line (22), wherein at least one active filter (24) attached to at least one lower voltage secondary side transformer line (22) is used for the attenuation or elimination of higher order harmonics experienced by the common feeding (1). Furthermore a high power distribution system for use of such a method is disclosed, in particular for the operation of an electrostatic precipitator.

Abstract: Methods and systems are provided for dynamically auto-tuning a gas turbine engine. Initially, parameters of the gas turbine engine are monitored to determine that they are within predefined upper and lower limits such that a margin exists. A first incremental adjustment of an inlet guide vane (IGV) angle is performed. If the monitored parameters are still within the predefined upper and lower limits, a second incremental adjustment of the IGV angle is performed. It is determined that the monitored parameters are still within the predefined upper and lower limits. Additionally, it is determined that a predefined value of the IGV angle has been reached such that the IGV angle is not to be further increased or decreased.

Abstract: A magnetic fault current limiter core (10a) comprising at least one first magnetic element (12) and at least one second magnetic element (14), the magnetic elements (12,14) being arranged to define a substantially parallel array of magnetic elements (12,14), the or each first magnetic element (12) including a soft magnetic material and the or each second magnetic element (14) including a hard magnetic material, wherein the or each soft magnetic material in a non-saturated state has a higher magnetic permeability than the or each hard magnetic material.

Abstract: A system and method for controlling oxidation of sulfites in a slurry. The system includes a tank having an inlet for receiving a slurry used in wet flue gas desulfurization. The tank also includes an inlet for receiving a gas. The inlet for receiving the gas is configured so that at least a portion of the gas received in the tank is dispersed through at least a portion of the slurry received in the tank. A sensor is configured to measure a sulfite concentration S1 of the slurry received in the tank. In some embodiments, the sensor is a sulfite analyzer. In other embodiments, the sensor is a virtual analyzer. The system includes a controller. Software executing on the controller generates a signal indicative of an adjustment of a flow rate of gas into the tank based at least in part on the sulfite concentration S1.