Abstract: A method for cleaning a gas turbine unit. The invention further relates to a nozzle for use in washing the gas turbine unit. The nozzle is arranged to atomize a wash liquid in the air stream in an air intake of the gas turbine unit and comprises a nozzle body comprising an intake end for intake of said wash liquid and outlet end for exit of said wash liquid. The nozzle further comprises a number of orifices that are connected to the outlet end and respective orifice is arranged at a suitable distance from a center axis of said nozzle body, whereby the local density of the injected wash liquid in a desired area can be increased with preserved droplet size and thereby the efficiency of the cleaning process can be significantly improved at the same time as the risk for damaging the components in the gas turbine unit is significantly reduced.

Abstract: Device for cleaning a gas turbine engine, and in particular an engine of turbofan type. The present invention further relates to a method for cleaning such an engine. The device comprises a plurality of nozzles arranged to atomize cleaning liquid in the air stream in an air inlet of the engine up-stream of a fan of the engine. According to the invention, a first nozzle is arranged at a position such that the cleaning liquid emanating from the first nozzle impinges the surfaces of the blades substantially on the pressure side; a second nozzle is arrange at a position such that the cleaning liquid emanating from the second nozzle impinges the surfaces of the blades substantially on the suction side; and a third nozzle is arranged at a position such that the cleaning liquid emanating from the third nozzle passes substantially between the blades and enters an inlet of the core engine.

Abstract: A nozzle for cleaning a gas turbine unit during operation. The invention further relates to a method for washing a gas turbine unit during operation. The nozzle is arranged to atomize a wash liquid in the air stream in an air intake of the gas turbine unit and comprises a nozzle body comprising an intake end for intake of said wash liquid and outlet end for exit of said wash liquid. The nozzle further comprises a number of orifices that are connected to the outlet end and respective orifice is arranged at a suitable distance from a centre axis of said nozzle body, whereby the local density of the injected wash liquid in a desired area can be increased with preserved droplet size and thereby the efficiency of the cleaning process can be significantly improved at the same time as the risk for damaging the components in the gas turbine unit is significantly reduced.

Abstract: A nozzle (54) for cleaning a gas turbine unit (1) during operation. The invention further relates to a method for washing a gas turbine unit (1) during operation. The nozzle (54) is arranged to atomize a wash liquid in the air stream in an air intake (2) of the gas turbine unit (1) and comprises a nozzle body (40) comprising an intake end (41) for intake of said wash liquid and outlet end (55) for exit of said wash liquid. The nozzle further comprises a number of orifices (42, 46; 42, 46, 60) that are connected to the outlet end (55) and respective orifice (42, 46; 42, 46, 60) is arranged at a suitable distance from a center axis (49) of said nozzle body (40), whereby the local density of the injected wash liquid in a desired area can be increased with preserved droplet size and thereby the efficiency of the cleaning process can be significantly improved at the same time as the risk for damaging the components in the gas turbine unit is significantly reduced.

Abstract: Device for cleaning a gas turbine engine (2), and in particular an engine of turbofan type. The present invention further relates to a method for cleaning such a engine. The device comprises a plurality of nozzles (31, 33, 35) arranged to atomize cleaning liquid in the air stream in an air inlet (20) of the engine (2) up-stream of a fan (25) of the engine (2). According to the invention a first nozzle (31) is arranged at a position such that the cleaning liquid emanating from the first nozzle (31) impinges the surfaces of the blades (40) substantially on the pressure side (53); a second nozzle (35) is arranged at a position such that the cleaning liquid emanating from the second nozzle (35) impinges the surfaces of the blades (40) substantially on the suction side (54); and a third nozzle (33) is arranged at a position such that the cleaning liquid emanating from the third nozzle (33) passes substantially between the blades (40) and enters an inlet (23) of the core engine (203).

Abstract: A method for cleaning a stationary gas turbine unit during operation, wherein the unit comprises a turbine, a compressor driven by the turbine, the compressor having an inlet, an air inlet duct arranged upstream of the air inlet of the compressor, the inlet duct having a part of the duct adjoining the inlet of the compressor and having decreasing cross section in the flow direction in order to give the air flow a final velocity at the inlet to the compressor. A spray of cleaning fluid is introduced in the inlet duct. The cleaning fluid is forced through a spray nozzle with a pressure drop exceeding 120 bar to form a spray the drops of which have a mean size that is less than 150 ?m. The spray is directed substantially parallel to and in the same direction as the direction of the air flow.

Abstract: The present invention discloses a method and system for augmenting shaft output of stationary gas turbines that can be used in multiple modes of operation. The system comprises a washing unit (25, 27, 28) adapted to inject a spray (26) of atomized liquid so as to impinge on the compressor blades (12) in order to wet said blades (12), thereby obtaining a release of fouling material from said blades (12); and at least one liquid injection unit (21, 23, 24, 29, 210, 212, 214, 215, 216) adapted to inject a spray (22, 211, 213) of atomized liquid into an air stream of said turbine duct (101) or at the gas turbine (10) in order to increase a mass flow of said air flow, wherein the power output from said gas turbine engine can be augmented. With the invention follows also benefits such as fuel savings and improved environmental performance by reduction of emissions.

Abstract: A system and method for washing engines and for collecting and treating the waste water from engine washing operations. The system includes a collecting device for collecting waste liquid during a washing operation of the engine and a treatment device for treating waste liquid collected during the washing operation. The system may be advantageously arranged on a mobile cart having a chassis provided with wheels. The mobile cart also includes an adjusting device for adjusting the vertical position of liquid separating and collecting components relative to the engine.

Abstract: The present invention discloses a method and system for augmenting shaft output of stationary gas turbines that can be used in multiple modes of operation. The system comprises a washing unit (25, 27, 28) adapted to inject a spray (26) of atomized liquid so as to impinge on the compressor blades (12) in order to wet said blades (12), thereby obtaining a release of fouling material from said blades (12); and at least one liquid injection unit (21, 23, 24, 29, 210, 212, 214, 215, 216) adapted to inject a spray (22, 211, 213) of atomized liquid into an air stream of said turbine duct (101) or at the gas turbine (10) in order to increase a mass flow of said air flow, wherein the power output from said gas turbine engine can be augmented. With the invention follows also benefits such as fuel savings and improved environmental performance by reduction of emissions.

Abstract: When washing objects, such as turbine compressors, which operate with large quantities of air and are therefore internally soiled by and coated with contaminants carried by the air, finely-divided liquid is sprayed onto and through the object. The liquid is finely-divided to a degree at which the particles of the liquid will follow the same routes to and through the object as those previously taken by the air-borne contaminants. The quantities of finely-divided liquid are sprayed through at least one nozzle toward and through the object at an overpressure within the range of 50-80 bars at a liquid particle size in the range 250-120 .mu.m and with a total volumetric flow through the nozzle or nozzles within the range of 0.5-60 l/min., and with a liquid particle velocity of 100-126 m/sec.