Abstract: A multi-stage hybrid evaporative cooling system is described as having a direct evaporative cooling subsystem and an indirect evaporative cooling subsystem having one of a horizontal and a vertical set of heat exchanger channels. The multi-stage hybrid evaporative cooling system with a horizontal set of heat exchanger channels has a portion of the horizontal heat exchanger channels partially extended into a next stage of the multi-stage system. The multi-stage hybrid evaporative cooling system with the vertical set of heat exchanger channels includes a first set of vertical set of heat exchanger channels spanning a substantial vertical height of the stage of the hybrid evaporative cooling system, and a second set spanning approximately half the height of the stage. The multi-stage hybrid evaporative cooling system further includes a refrigeration system for lowering the temperature of the indirect evaporative cooling subsystem air without affecting its pressure flow.

Abstract: A multi-stage hybrid evaporative cooling system is described as having a direct evaporative cooling subsystem and an indirect evaporative cooling subsystem having one of a horizontal and a vertical set of heat exchanger channels. The multi-stage hybrid evaporative cooling system with a horizontal set of heat exchanger channels has a portion of the horizontal heat exchanger channels partially extended into a next stage of the multi-stage system. The multi-stage hybrid evaporative cooling system with the vertical set of heat exchanger channels includes a first set of vertical set of heat exchanger channels spanning a substantial vertical height of the stage of the hybrid evaporative cooling system, and a second set spanning approximately half the height of the stage. The multi-stage hybrid evaporative cooling system further includes a refrigeration system for lowering the temperature of the indirect evaporative cooling subsystem air without affecting its pressure flow.

Abstract: Novel heat exchangers and methods of constructing the heat exchangers for use in indirect evaporative cooling applications. The evaporative apparatus for cooling comprises both a multi-stage indirect evaporative cooling heat exchanger; and a multi-stage sump where each sump stage, in a one-to-one relationship. Other multistage heat exchangers with their associated multistage sumps can be combined, with the cooled air of a first multistage evaporative assembly feeding into the intake end of a second multistage evaporative assembly, and so on. These heat exchangers can be used for comfort and industrial applications cooling. The invention can be an entire assembly for the pre-cooling and cleaning of the air going to a gas turbine or any other air breathing device, with an air washer stage in which air is directly cooled by evaporation and where simultaneously the air is also cleaned of dust, dirt and other impurities.

Abstract: Novel heat exchangers and methods of constructing the heat exchangers for use in indirect evaporative cooling applications. The evaporative apparatus for cooling comprises both a multi-stage indirect evaporative cooling heat exchanger; and a multi-stage sump where each sump stage, in a one-to-one relationship. Other multistage heat exchangers with their associated multistage sumps can be combined, with the cooled air of a first multistage evaporative assembly feeding into the intake end of a second multistage evaporative assembly, and so on. These heat exchangers can be used for comfort and industrial applications cooling. The invention can be an entire assembly for the pre-cooling and cleaning of the air going to a gas turbine or any other air breathing device, with an air washer stage in which air is directly cooled by evaporation and where simultaneously the air is also cleaned of dust, dirt and other impurities.

Abstract: A system for cooling, cleaning and humidifying air entering an air breathing gas turbine. The air is first cooled on the dry side of an indirect evaporative heat exchanger and then moistened and cleaned by a fine water spray of distilled water obtained from a boiler heated with excess heat from the gas turbine and condensed by the moist cool air leaving the wet side of the heat exchanger.

Abstract: A depressed wet bulb water cooler utilizing an indirect evaporating film heat exchanger having walls defining wet and dry sides. In a particular embodiment, the wet and dry sides are formed respectively as the opposite inner and outer surfaces of elongated hollow tubular conduits. Water from a load is applied across the inner wet side surfaces while intake air is drawn across the outer, dry side surfaces so as to cool the intake air to a first temperature. The cooled air is then flowed as working air at substantially the first temperature over the wet side of the conduits, and discharged.

Abstract: An indirect evaporating film heat exchanger having walls defining separated wet and dry sides provide energy-efficient cooling to a gas compression system. In a particular embodiment the heat exchanger supplies a cool dry air stream and a cool moist air stream, respectively, to the power turbine's compressor inlet and intercooler of the gas compression system.

Abstract: Air is evaporatively cooled by water in which the evaporating water is kept separate from the useful air (cooled air stream) by means of a heat exchanger so that cooling is performed without the addition of water vapor to the useful air, and in which the working air, absorbing the water vapor, is drawn from the load. A heat exchanger is disclosed which operates by movement of the working air internally through tubular conduits countercurrently to water flowing downwardly on the inner surfaces thereof while the air to be cooled passes externally across the conduits.

Abstract: Air is evaporatively cooled by water in which the evaporating water is kept separate from the useful air (cooled air stream) by means of a heat exchanger so that cooling is performed without the addition of water vapor to the useful air, and in which the working air, absorbing the water vapor, is drawn from the load. A heat exchanger is disclosed which operates by movement of the working air internally through tubular conduits countercurrently to water flowing downwardly on the inner surfaces thereof while the air to be cooled passes externally across the conduits.