7 results about "Dropwise condensation" patented technology

In an embodiment, the present disclosure pertains to a method of forming a self-assembled monolayer coating on a surface of a substrate. In general, the method includes polishing the substrate, cleaning the substrate, and creating a plurality of bonding sites on the surface of the substrate for head groups of an organofunctional silane molecule to bond. In some embodiments, the creating includes at least one of a liquid-phase chemistry process or a dry plasma chemistry process. In some embodiments, the method further includes coating the substrate with a silane coating solution. In some embodiments, the coating is performed in a controlled environment. In some embodiments, the controlled environment includes an anhydrous environment free of at least one of water or moisture. In a further embodiment, the present disclosure pertains to a heat transfer composition having a coating thereon applied via the methods of the present disclosure.

Coated substrate including coatings including a first layer that includes a conformal coating, an intermediary layer that includes an adhesion promoter formed on the first layer, and an outer omniphobic layer that includes a fluoroalkyl group formed on the intermediary layer, are provided herein. Methods of condensing liquids having surface tensions of from about 10 mN / m to about 72 mN / m on the coated substrate are further provided. Methods of forming coated substrates are further provided.

This application provides a hydrophilic-phobic composite trench surface for enhancing droplet condensation heat transfer under high subcooling and its preparation method. The surface is formed by processing a metal substrate and includes an array of superhydrophilic micro-grooves and hydrophobic ridges protruding between the grooves. Hydrophilic stripes are provided on both sides of the top of the hydrophobic ridges and are connected to the liquid film of the superhydrophilic micro-grooves. The preparation method includes four steps: metal substrate pretreatment, laser marking of the superhydrophilic micro-groove array, preparation of the hydrophobic ridges, and secondary laser marking of the hydrophilic stripes. This invention achieves directional and rapid transport of droplets on the ridges through the liquid film communication effect between the hydrophilic stripes and the superhydrophilic micro-grooves, significantly increasing the droplet renewal frequency, maintaining droplet condensation for a long time and avoiding flooding, thus significantly enhancing heat transfer efficiency. The preparation process is simple, has high processing precision, low cost, and is easy to achieve industrial mass production.

To provide a boiler system that inhibits a droplet condensation promoter from adhering to a boiler water pipe of a boiler and causing failure.SOLUTION: A boiler system 1 includes a boiler 70 and a heat exchanger 20. The boiler system 1 also includes a droplet condensation promoter treatment device 50 that is provided in at least one of a drain recovery line 122 and a boiler supply water line 132 to remove at least part of a droplet condensation promoter 140 included in at least one of drain water 120 flowing in the drain recovery line 122 and boiler supply water 130 flowing in the boiler supply water line 132.SELECTED DRAWING: Figure 1

The application provides a hydrophilic-hydrophobic composite wetting microstructure steam cavity and a manufacturing method thereof, and relates to the technical field of heat dissipation devices. The hydrophilic-hydrophobic composite wetting microstructure steam cavity comprises an evaporation end and a condensation end, the surface of the evaporation end comprises a microchannel hydrophilic area and a microarray hydrophilic area, the microchannel hydrophilic area surrounds the microarray hydrophilic area; the surface of the condensation end comprises spaced condensation hydrophilic areas and condensation hydrophobic areas, and the evaporation end and the condensation end are assembled to form a flat plate structure with a cavity in the middle. The different wetting surfaces of the condensation hydrophilic areas and the condensation hydrophobic areas are combined, nucleation and condensation can be quickly realized, dropwise condensation heat transfer of the condensation hydrophobic areas is combined with rapid liquid drop-off, capillary suction of the evaporation end microchannel hydrophilic area is combined with rapid liquid discharge, the working medium condensation heat transfer is strengthened, the liquid backflow circulation is accelerated, the temperature uniformity of the hydrophilic-hydrophobic composite wetting microstructure steam cavity is greatly improved, and the microimprinting technology of in-situ heating and pressure forming is adopted to realize batch forming of a large-area microstructure functional surface.

Coated substrate including coatings including a first layer that includes a conformal coating, an intermediary layer that includes an adhesion promoter formed on the first layer, and an outer omniphobic layer that includes a fluoroalkyl group formed on the intermediary layer, are provided herein. Methods of condensing liquids having surface tensions of from about 10 mN / m to about 72 mN / m on the coated substrate are further provided. Methods of forming coated substrates are further provided.

To provide a method for removing organic dissolved substances in water-steam cycle, which simultaneously achieves improved heat exchanger efficiency through the addition of droplet condensation promoters and the removal of organic dissolved substances from the water-steam cycle system excluding the target heat exchanger.SOLUTION: A method for removing organic dissolved substances in a water-steam cycle where organic chemicals are added upstream of a heat exchanger, the method for passing at least a part of the drain water from the heat exchanger through a filtration device to remove organic dissolved substances, in which the filtration device comprises a plurality of devices arranged in parallel, each comprising at least one of an ion exchange device, an activated carbon filtration apparatus, an RO membrane device, and an NF membrane device, arranged in parallel, a part of the drain water is passed through some of these devices, and when the filtration performance is determined to have decreased based on the amount of chemical added or water quality measurements from sensors, the water flow is switched to another device.SELECTED DRAWING: Figure 1