An air-cooled condenser system for steam condensing applications in a power plant Rankine cycle includes an air cooled condenser having a plurality of interconnected modular cooling cells. Each cell comprises a frame-supported fan, inlet steam header, outlet condensate headers, and tube bundle assemblies having optionally finned tubes extending between the headers. The tube bundle assemblies may fabricated into an A-shaped tube structure. The tube bundles are self-supporting without support from any part of the frame between top and bottom tubesheets of each bundle. The condensate headers may be slideably mounted to the frame for thermal expansion/contraction. Steam circulating in a closed flow loop on the tube side from a steam turbine is cooled in each cell by ambient air blown through the tube bundles, thereby forming liquid condensate returned to the Rankine cycle. The present design further provides a longitudinal and vertical thermal expansion restraint system.

A heating, ventilation, and air conditioning (HVAC) system may comprise an evaporator core including an upstream inlet face in which humid air is received, a downstream outlet face from which dehumidified air is discharged, and a plurality of air-contacting surfaces extending between the inlet and outlet faces. In one form, an antimicrobial coating may be formed on the air-contacting surfaces of the evaporator core. The antimicrobial coating may comprise an ionic material having immobilized ionic groups of one type of charge and mobile counterions of another type of charge. The mobile counterions may be ionically associated with the immobilized ionic groups. In another form, an ultraviolet light emitting diode (UV-LED) may be used to direct UV light onto the air-contacting surfaces of the evaporator core.

A convector for air cooling of a fluid flowing in a pipe, comprising: a path for a cooling air flow comprising an inlet from and an outlet towards the environment, a heat exchange section comprising at least one tube bundle defining a heat exchange surface, said section being provided in said path for the air flow, fan means producing said air flow along said path, so that said air flow externally invests said tube bundle on said; heat exchange surface, a humidifying section arranged in said path, upstream of said heat exchange section, where water is atomized to be invested by the air flow, characterized by comprising a wetting device for wetting directly with water a portion of the heat exchange surface of said tube bundle to further cool said portion of tube bundle.

A convector for air cooling of a fluid flowing in a pipe, comprising: a path for a cooling air flow comprising an inlet from and an outlet towards the environment, a heat exchange section comprising at least one tube bundle defining a heat exchange surface, said section being provided in said path for the air flow, fan means producing said air flow along said path, so that said air flow externally invests said tube bundle on said; heat exchange surface, a humidifying section arranged in said path, upstream of said heat exchange section, where water is atomized to be invested by the air flow, characterized by comprising a wetting device for wetting directly with water a portion of the heat exchange surface of said tube bundle to further cool said portion of tube bundle.

Heat exchanger processes are disclosed. A heat exchanger process uses a heat exchanger. The heat exchanger has a surface positioned to be contacted by a fluid. The heat exchanger process includes contacting the surface with the fluid by transporting the fluid through the heat exchanger and transferring heat between the surface and the fluid. The transporting is at a rate of less than 2 meters per second, the surface includes a fouling-resistant coating, the fluid includes particles known to cause fouling, or a combination thereof.

Heat exchanger processes are disclosed. A heat exchanger process uses a heat exchanger. The heat exchanger has a surface positioned to be contacted by a fluid. The heat exchanger process includes contacting the surface with the fluid by transporting the fluid through the heat exchanger and transferring heat between the surface and the fluid. The transporting is at a rate of less than 2 meters per second, the surface includes a fouling-resistant coating, the fluid includes particles known to cause fouling, or a combination thereof.

A heat exchanger for an air-conditioning circuit of a vehicle. The heat exchanger enables heat exchange between fluids and has a surfaces in contact with one of the fluids. The surface is formed from aluminum and/or from aluminum alloy. The surface is coated with an alumina layer and a reinforcing layer. The reinforcing layer includes an organic substance and a mineral substance. The organic substance includes at least one polymer and the mineral substance is capable of reacting with the aluminum in order to form an anticorrosion material.

A heat exchanger for an air-conditioning circuit of a vehicle. The heat exchanger enables heat exchange between fluids and has a surfaces in contact with one of the fluids. The surface is formed from aluminum and/or from aluminum alloy. The surface is coated with an alumina layer and a reinforcing layer. The reinforcing layer includes an organic substance and a mineral substance. The organic substance includes at least one polymer and the mineral substance is capable of reacting with the aluminum in order to form an anticorrosion material.

Oleophobic and/or philic surface(s) are utilized for oil separation, direction, and/or collection in a refrigeration system. Surfaces of component(s) of a refrigeration system (compressor, oil separator, evaporator, etc.) are produced to be oleophobic or philic. The oleophobic and/or philic surfaces are utilized to direct a flow path of oil within the refrigeration system or to prevent oil connection in an area. Refrigerant phobic and/or lubricant phobic material(s) also may be utilized to help promote separation of refrigerant vapor from refrigerant liquid and/or from oil in refrigeration systems.

Oleophobic and/or philic surface(s) are utilized for oil separation, direction, and/or collection in a refrigeration system. Surfaces of component(s) of a refrigeration system (compressor, oil separator, evaporator, etc.) are produced to be oleophobic or philic. The oleophobic and/or philic surfaces are utilized to direct a flow path of oil within the refrigeration system or to prevent oil connection in an area. Refrigerant phobic and/or lubricant phobic material(s) also may be utilized to help promote separation of refrigerant vapor from refrigerant liquid and/or from oil in refrigeration systems.