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33results about How to "Enhanced condensation heat transfer" patented technology
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Long-term efficient passive containment cooling system utilizing jetting technique
ActiveCN106782698AImprove cooling efficiencyReduce evaporationNuclear energy generationCooling arrangementDischarge efficiencyWater vapor
The invention aims to provide a long-term efficient passive containment cooling system utilizing a jetting technique. A built-in heat exchanger of a containment and upper and lower pipe sections form a first-stage heat discharging system; an air cooler, a water tank baffle plate and a steam-air jet device in an external water tank form a second-stage heat discharging system of a cooling system; the steam-air jet device is located on the side wall surface of a gas space in the water tank and is used for introducing water steam produced by virtue of the first-stage heat discharging system into an ejector to jet air of the second-stage heat discharging system, so as to decrease the inlet temperature of the first-stage heat discharging system, so that the heat discharging efficiency of the system is improved; and a passive containment heat exchanger adopts an intensified heat exchange pipe and is located in the containment, the heat exchange pipe adopts a small-coil-pipe light pipe, and drainage plates are mounted on the periphery of the heat exchanger. According to the long-term efficient passive containment cooling system, when a crevasse accident occurs at a main cooling agent loop or a main steam pipeline, the internal heat in the containment can be efficiently taken away in a long term, so that the internal temperature and pressure of the containment can be below safety limit values for a long time under accident conditions.
Owner:HARBIN ENG UNIV
Submersible liquid-cooling server and submersible liquid cooling method for server
The invention relates to a submersible liquid-cooling server capable of preventing refrigerant steam leakage and a submersible liquid cooling method for the server. The server comprises a refrigerant tank, a heating element and a cooling element. The heating element is arranged in the refrigerant tank and is submerged by refrigerants. The cooling element is disposed above the liquid level of the refrigerants. Fans or air blowers are arranged above the cooling element, the direction of air flows blown out is parallel to the liquid level of the refrigerants to form an air curtain above the cooling element. The method for the server comprises that the refrigerants absorb heat of the heating element submerged in the refrigerants to evaporate the heat to form refrigerant steam which flows upwards; the cooling element performs heat exchange with the refrigerant steam flowing upwards, condensing the refrigerant steam into refrigerant liquid drops which drop back into the refrigerant tank due to the action of gravity; the air flows blown out by the fans or the air blowers are parallel to the liquid level of the refrigerants to form the air curtain above the cooling element.
Owner:SUGON DATAENERGYBEIJING CO LTD
High-efficiency gravity heat pipe and manufacturing method thereof
ActiveCN102445097AContinuous boiling phenomenonEnhanced boiling heat transferIndirect heat exchangersLiquid/solution decomposition chemical coatingFree energiesPorous layer
The invention relates to a high-efficiency gravity heat pipe and a manufacturing method thereof. The high-efficiency gravity heat pipe comprises an evaporating section, a heat insulating section and a condensing section, and is characterized in that a metal powder porous layer is sintered on the inner surface of the heat tube evaporating section, and the condensing section is chemically coated. The heat tube manufactured by the process method in the invention can simultaneously reinforce boiling heat transfer and condensing heat transfer, so that a plurality of ideal vaporization cores are artificially increased, thus the boiling phenomenon of the liquid is continuously carried out to achieve a purpose of reinforcing the boiling heat transfer; on the other hand, the surface of a chemical coating of the heat tube condensing section is modified to acquire a low surface free energy value; simultaneously, the coating layer is a metal-based coating layer with good thermal conductivity, thus the condensing heat transfer can be reinforced; from the above, the high-efficiency gravity heat tube reinforce the boiling and condensing effects very remarkably, has the characteristics of good heat transfer reinforcing effect, high production efficiency, low cost and the like.
Owner:EAST CHINA UNIV OF SCI & TECH
Method and device for controlling heat transfer performance of droplet condensation on superhydrophobic surface
InactiveCN102269539AStrength controlPromote sheddingHeat exchange apparatusCondensation heat transferEngineering
The invention discloses a control method and device for a condensation heat-transferring property of a super-hydrophobic surface. The control method is characterized by comprising the following steps: modifying the surface of a condensation heat exchanger into a super-hydrophobic surface with a micro structure; utilizing a device which comprises a computer, a control module and a realizing moduleto firstly realize dropwise condensation; and applying mechanical bandwidth micro-vibration to the main body of the condensation heat exchanger so as to compel a condensate water drop in a certain size or within a certain size scope to quickly drop from the surface of the condensation heat exchanger, thereby achieving the purpose of controlling the dropwise condensation heat-transferring property. The control method has the beneficial effects that the condensation heat transfer can be strengthened while the strength of heat exchange property is controlled. By applying micro-vibration to a heat exchange surface, the wetting state of the condensate water drop is changed and the condensate water drop can easily drop from the heat exchange surface; and simultaneously, the applied mechanical vibration is wide-frequency vibration which acts on condensate water drops in different sizes. The control on the dropwise condensation heat-transferring strength is realized by controlling a dropping diameter in a dropwise condensation process.
Owner:UNIV OF SHANGHAI FOR SCI & TECH
Water collecting device with gradient hydrophilic and hydrophobic performance and application thereof
ActiveCN105973021APromote regenerationSpeed up condensationSteam/vapor condensersDrinking water installationEnergy conservationChemistry
The invention belongs to the technical field of water collecting and energy conservation, and particularly relates to a water collecting device with the gradient hydrophilic and hydrophobic performance and an application thereof. The water collecting device with the gradient hydrophilic and hydrophobic performance comprises gradient pore hydrophilic porous foam, hydrophobic porous foam, a collecting tank, a protective cover and a porous foam fixing structure; wherein the protective cover is filled with the gradient pore hydrophilic porous foam and the hydrophobic porous foam; two spaces are arranged on the two sides of the hydrophobic porous foam correspondingly; the front space is an interval gap between the hydrophobic porous foam and the gradient pore hydrophilic porous foam, and the width of the front space is in a millimeter scale; the rear space is provided with the collecting tank; and the hydrophobic porous foam is suspended through the porous foam fixing structure, so that the interval gap on the front side communicates with the collecting tank.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Hot water non-stick surface structure and preparation method thereof
The invention discloses a hot water non-stick surface structure and a preparation method thereof. The super-hydrophobic interface structure comprises a nano cone array structure formed on the surface of a substrate, wherein the nano array structure comprises a plurality of nano protrusions arranged in an array manner; at least the top of the nano protrusion is provided with a conical structure; the distance between two adjacent nano protrusions is 50-500nm; the top diameter of the nano protrusions is 1-200nm; and the surface of the nano array structure is modified with low surface energy substances. The preparation method is mainly implemented by virtue of a chemical bath deposition method. The super-hydrophobic surface structure disclosed by the invention has good hot water non-stick properties, non-stick impact and instantaneous rebound of hot water drops or hot water flow can be realized, the preparation process is easy to operate and control, any expensive equipment is not needed, and the super-hydrophobic surface structure is low in consumption, environment-friendly, high in reproducibility and short in period, can be prepared in large area and has excellent industrial application prospects.
Owner:SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
Long-term firm durable hydrophobic coating as well as preparation method and application thereof
ActiveCN108977782AEnhanced condensation heat transferIncrease ionization rateVacuum evaporation coatingSputtering coatingRare earthMechanical property
The invention relates to the technical field of hydrophobic coatings, in particular to a long-term firm durable hydrophobic coating as well as a preparation method and application thereof. The long-term firm durable hydrophobic coating comprises a rare earth metal transition layer and a rare earth oxide coating, wherein the rare earth metal transition layer is deposited between a base and the rareearth oxide coating, the material of the rare earth metal transition coating is a rare earth metal which is corresponding to the rare earth oxide coating, and the base is a metal base or a nonmetal base. The hydrophobic coating provided by the invention has a good mechanical property, a thermodynamic property, corrosion resistance and a long-term firm durable characteristic, and particularly canbe applied in a severe environment, so that the application of a hydrophobic rare earth oxide coating is greatly promoted in different fields.
Owner:HANGZHOU DIANZI UNIV
Integral inclined pin-fin tube
InactiveCN103090714ASolving Corrosion ProblemsReduce obscenityTubular elementsDual actionHeat transmission
The invention provides an integral inclined pin-fin tube which comprises a base tube and pin-fins, wherein the pin-fins are inclined pin-fins formed by directly cutting on the surface of the base tube, and the included angle of the inclined pin-fins and a base tube shaft is smaller than 90 degrees. The integral inclined pin-fins are suitable for strengthening the heat transmission process of steam-air mixed gas under a vertically arranged condition. When the capacity of steam in the mixed gas is high, steam condensate liquid on the surface of the base tube of the integral inclined pin-fin tube can be exhausted along the inclined pin-fins, and therefore the thickness of a liquid film on the base tube is reduced to enhance condensation heat transmission. Furthermore, under the dual-influence of gravity and surface tension, a thick liquid film can hardly be formed on the surfaces of the inclined pin-fins by the steam, and therefore condensation heat transmission ability of a secondary heat transmission surface is enhanced. When the capacity of the steam in the mixed gas is low, as a heat transmission tube, the inclined pin-fins are helpful for improving heat transmission coefficients, and the inclined fin-pins can be discontinuously distributed on the base tube to eliminate stagnation regions of flowing of the mixed gas.
Owner:HARBIN ENG UNIV
Combined exterior structural heat pipe for vertical heat-pipe condensers and manufacturing method thereof
InactiveCN103727823AEasy maintenanceThe processing technology is simple and reliableIndirect heat exchangersHeat pipeCivil engineering
The invention relates to a combined exterior structural heat pipe for vertical heat-pipe condensers. The combined exterior structural heat pipe for vertical heat-pipe condensers comprises a pipe body including a condensing segment and an evaporating segment. An exterior fin structure is arranged outside the pipe body, corresponding to the condensing segment, and an exterior grooved structure is arranged outside the pipe body, corresponding to the evaporating segment. The invention further relates to a manufacturing method of the combined exterior structural heat pipe for vertical heat-pipe condensers. The method includes the steps: manufacturing of the pipe body, manufacturing of an exterior fin unit, an upper end cover and a lower end cover, manufacturing of the exterior fin structure, and manufacturing and packaging of an absorbent core. The combined exterior structural heat pipe for vertical heat-pipe condensers and the manufacturing method thereof have the advantages that manufacturing process is simple and reliable, the combined exterior structural heat pipe provides a vertical heat-pipe condenser with good condensing effect and maintenance simplicity, and the combined exterior structural heat pipe and the manufacturing method thereof belong to the technical field of parts for condensers.
Owner:SOUTH CHINA UNIV OF TECH
Surface preparation method capable of preparing various nanowire structures
ActiveCN111218702AGreat potentialControllable surface topographyMaterial nanotechnologyNanowirePhase change heat transfer
The invention relates to a surface preparation method capable of preparing various nanowire structures, and belongs to the technical field of surface treatment. According to the method, a template-assisted electroplating method is utilized, and multiple structural shapes such as upright type, agglomeration type and round pit type can be formed by changing hole spacing, hole diameter and electroplating duration of the template, and the structure height and an included angle of the upright type and the agglomeration type can be changed. The height of nanowires is 4 microns-50 microns, the centerdistance of the nanowires is 60nm-500nm, and the diameter of the nanowires is 5nm-400nm. The surface shapes prepared by the preparation method are controllable, structural form is diversified, and cross-scale effect can be achieved, the upright type and the agglomeration type can be used for condensation and the round pit type can be used in the field of phase change heat transfer such as boiling.
Owner:DALIAN UNIV OF TECH
Surface preparation method capable of preparing various nanowire structures
InactiveCN110387565AGreat potentialControllable surface topographyMaterial nanotechnologyNanowireElectroplating
The invention discloses a surface preparation method capable of preparing various nanowire structures, and belongs to the technical field of surface treatment. According to the method, by means of a template-assisted electroplating method, various structural appearances such as an upright type, an agglomeration type and a round pit type can be formed by changing the interval and aperture of template holes and the electroplating time, and the structure height and included angle of the upright type and the agglomeration type can be changed. Nanowires are 4-50 microns high, the center distance ofthe nanowires is 60-500 nm, and the diameter of the nanowires is 5-400 nm. The surface appearances prepared through the preparation method are controllable, the structural form is diversified and cross-scale, the upright type and the agglomeration type can be used for condensation, and the round pit type can be applied to the field of phase-change heat transfer such as boiling.
Owner:DALIAN UNIV OF TECH
Portable dew collecting device with conical reinforced condensing pipes
PendingCN110185091AIncrease the heat exchange areaImprove collection efficiencyDrinking water installationCondensation processWater discharge
The invention provides a portable dew collecting device with conical reinforced condensing pipes, and belongs to the technical field of condensing phase transformation. The portable dew collecting device with the conical reinforced condensing pipes structurally comprises the conical reinforced condensing pipes, condensing pipe hanging racks, a support frame and a dew collecting tank, wherein microgrooves are formed in the outer surfaces of the condensing pipes in the axis direction and are used for downwards discharging condensate; sub-millimeter micro-bulging coarse structures are arranged on rib walls between the micro grooves; hydrophobic modification and hydrophilic modification are respectively carried out on the upper parts and lower ends of the condensing pipes so as to facilitatethe generation of dropwise condensation on the surfaces of the condensing pipes, intensity the condensation process, facilitate the formation of downward capillary differential pressure in the water discharging grooves and promote the discharge of condensed water from the surfaces of the condensed pipes; the condensing pipes are arranged in a staggering manner to increase the windward area; and the condensing pipe hanging racks are connected to the support in a bayonet type, thereby facilitating the disassembly and improving the portability. The whole device has novel structure, good portability, clear principle of water vapor collection and high reliability, can effectively intensify the condensation process of water vapor in the air on the surfaces of the condensing pipes and improves the collection efficiency of the condensed water.
Owner:YANGZHOU UNIV
Control method and device for dropwise condensation heat-transferring property of super-hydrophobic surface
InactiveCN102269539BStrength controlPromote sheddingHeat exchange apparatusCondensation heat transferEngineering
Owner:UNIV OF SHANGHAI FOR SCI & TECH
Immersion liquid cooling server, immersion liquid cooling method for server
The invention relates to a submersible liquid-cooling server capable of preventing refrigerant steam leakage and a submersible liquid cooling method for the server. The server comprises a refrigerant tank, a heating element and a cooling element. The heating element is arranged in the refrigerant tank and is submerged by refrigerants. The cooling element is disposed above the liquid level of the refrigerants. Fans or air blowers are arranged above the cooling element, the direction of air flows blown out is parallel to the liquid level of the refrigerants to form an air curtain above the cooling element. The method for the server comprises that the refrigerants absorb heat of the heating element submerged in the refrigerants to evaporate the heat to form refrigerant steam which flows upwards; the cooling element performs heat exchange with the refrigerant steam flowing upwards, condensing the refrigerant steam into refrigerant liquid drops which drop back into the refrigerant tank due to the action of gravity; the air flows blown out by the fans or the air blowers are parallel to the liquid level of the refrigerants to form the air curtain above the cooling element.
Owner:SUGON DATAENERGYBEIJING CO LTD
Device for controlling dropwise condensing heat transfer performance of superhydrophobic surface by means of sound field
InactiveCN109283852ABroad industry valueIncrease vibrational energyComputer controlFrequency/directions obtaining arrangementsCondensed waterSignal frequency
The invention relates to the technical field of strengthened heat transfer, in particular to a device for controlling the dropwise condensing heat transfer performance of a superhydrophobic surface bymeans of a sound field. The device comprises a shell; a dropwise condensing heat exchanger is arranged in the shell, a steam inlet is formed in the upper end of the shell, a condensed water outlet isformed in the lower end of the shell, a cooling water inlet and a cooling water outlet are formed in one side of the shell, the cooling water inlet is located above the cooling water outlet, and a sound is arranged on the other side of the shell and fixedly connected with the side wall of the shell; and the device further comprises a control module, an adjusting unit and a heat transfer performance detection unit, the control unit is connected with the adjusting unit, the adjusting unit is connected with the sound to enable the sound to generate a vibration which has the corresponding frequency and amplitude with a signal generated by the control unit, the vibration is loaded to the dropwise condensing heat exchanger, the heat transfer performance detected by the heat transfer performance detection unit is transmitted to the control unit in a signal mode, and the control unit adjusts the vibration signal frequency and amplitude of the sound.
Owner:SHANGHAI ZHIXIN INTELLIGENT ELECTRIC CO LTD
Immersion liquid cooling server, immersion liquid cooling method for server
ActiveCN104597994BImprove heat transfer effectAchieve cycleDigital data processing detailsLiquid cooling systemEvaporation
The invention relates to an immersed liquid cooling server and an immersed liquid cooling method for the server. The immersed liquid cooling server comprises a refrigerant groove, a heating element, a cooling element and a blower or a fan, wherein the refrigerant groove is used for accommodating refrigerants, the heating element is arranged in the refrigerant groove and is soaked by the refrigerants, the cooling element is positioned above the liquid level of the refrigerants, the blower or the fan is arranged above the cooling element, and the direction of airflow blown by the blower or the fan faces the cooling element. The immersed liquid cooling server has the forced condensing heat exchange effect. The immersed liquid cooling method for the server comprises the following steps that the refrigerants absorb heat of the heating element soaked into the refrigerants to form refrigerant steam through evaporation, and the refrigerants upwards flow; the cooling element carries out heat exchange with the upward flowing refrigerant steam, the refrigerant steam is condensed into refrigerant liquid drips, and the refrigerant liquid drips drip back into the refrigerant groove due to gravity effect; the air is downwards blown towards the cooling element through the blower or the fan. The method has the advantage that the condensed heat exchange of an immersed liquid cooling system is enhanced.
Owner:SUGON DATAENERGYBEIJING CO LTD
Gravity heat pipe with annular element
ActiveCN107144162AIncrease the heat exchange areaSolve the problem that is not easy to weldIndirect heat exchangersEnhanced heat transferHeat conservation
The invention relates to a novel efficient heat exchanger gravity heat pipe, in particular to a gravity heat pipe for thinning a condensation film by changing a pipe wall structure, and belongs to the technical field of heat exchange. The gravity heat pipe is composed of three zones including an evaporation section, a heat preservation section and a condensation section. When a gravity heat pipe works, a working medium is heated to evaporate to reach the condensation section to form a thick liquid film on the wall face, thermal resistance is increased, and heat transfer is blocked. According to the novel efficient heat exchanger gravity heat pipe, the annular elements are additionally arranged in the pipe, the wall face structure is changed, and therefore the liquid film is thinned. The annular elements are additionally arranged in the evaporation section, and therefore the liquid film of the evaporation section is evenly distributed, and falling film evaporation is achieved; the annular elements are additionally arranged in the condensation section, and therefore the liquid film is thinned, and condensation heat exchange is strengthened. Meanwhile, the annular elements are additionally arranged, enhancement of heat transfer of heat exchange areas of the condensation section and the evaporation section is increased, the arrangement of the elements in the evaporation section can further solve the problem that overflowing liquid generated by too thick liquid films returns to a liquid pool again, and influences of cold and hot air flow joining on heat transfer are avoided.
Owner:QINGDAO UNIV +1
High-efficiency gravity heat pipe and manufacturing method thereof
ActiveCN102445097BContinuous boiling phenomenonEnhanced boiling heat transferIndirect heat exchangersLiquid/solution decomposition chemical coatingFree energiesPorous layer
The invention relates to a high-efficiency gravity heat pipe and a manufacturing method thereof. The high-efficiency gravity heat pipe comprises an evaporating section, a heat insulating section and a condensing section, and is characterized in that a metal powder porous layer is sintered on the inner surface of the heat tube evaporating section, and the condensing section is chemically coated. The heat tube manufactured by the process method in the invention can simultaneously reinforce boiling heat transfer and condensing heat transfer, so that a plurality of ideal vaporization cores are artificially increased, thus the boiling phenomenon of the liquid is continuously carried out to achieve a purpose of reinforcing the boiling heat transfer; on the other hand, the surface of a chemical coating of the heat tube condensing section is modified to acquire a low surface free energy value; simultaneously, the coating layer is a metal-based coating layer with good thermal conductivity, thus the condensing heat transfer can be reinforced; from the above, the high-efficiency gravity heat tube reinforce the boiling and condensing effects very remarkably, has the characteristics of good heat transfer reinforcing effect, high production efficiency, low cost and the like.
Owner:EAST CHINA UNIV OF SCI & TECH
Absorption refrigerator condenser based on heat tube bundle with coagulation strengthening function
ActiveCN103697639ASimplify the design processSimplify the maintenance processEvaporators/condensersVacuum pressureEvaporation
The invention relates to an absorption refrigerator condenser based on a heat tube bundle with a coagulation strengthening function. The absorption refrigerator condenser comprises a vacuum pressure tank, the heat tube bundle, a guide fan housing and a guide exhaust fan, wherein the guide fan housing is fixed above the vacuum pressure tank; the guide exhaust fan is connected with the guide fan housing; the guide fan housing is not communicated with the vacuum pressure tank; heat tubes in the heat tube bundle are vertically arranged; the upper sections of the heat tubes are provided with condensation sections with outer fin structures; the lower sections of the heat tubes are evaporation sections with outer groove structures; the condensation sections are located inside the guide fan housing; the evaporation sections are located in the vacuum pressure tank. The defect caused by a water cooling heat exchanger in the absorption refrigerator condenser is avoided, and the absorption refrigerator condenser based on the heat tube bundle with the coagulation strengthening function has the advantage that the condensing effect is effectively strengthened, and belongs to the technical field of heat tube condensers.
Owner:SOUTH CHINA UNIV OF TECH
A Heat Transfer Element for Thinning Liquid Film Thickness of Regenerative Condensing Heat Exchanger
ActiveCN110500783BShort stayDrain rate increasedAir heatersHeat transfer modificationCondensation heat transferEngineering
The invention discloses a heat transfer element for reducing the liquid film thickness of a regenerative condensing heat exchanger. The heat transfer element is combined with two first corrugated plates and a second corrugated plate of composite structure. The first corrugated plate has inverted double herringbone corrugated channels, the first vertical trapezoidal corrugated channel and the first vertical plate; the second corrugated plate has double herringbone corrugated channels, the second vertical trapezoidal corrugated channel and the second Vertical slab. The first corrugated plate and the second corrugated plate are stacked to form a condensation heat transfer channel composed of two different heat transfer channel units. When condensation occurs, the first corrugated plate and the second corrugated plate accelerate the draining speed of the condensate at the same time, which reduces the thickness of the condensate film and further improves the condensation heat transfer capacity of the regenerative condensing heat exchanger. The invention can accelerate the discharge of the condensate, reduce the thickness of the condensate film, strengthen the condensation heat transfer, and further improve the comprehensive performance of the regenerative condensation heat exchanger.
Owner:XI AN JIAOTONG UNIV
Phase change heat storage device based on condensation heat transfer and its key parameter determination method
ActiveCN111278255BShed quicklyIncrease the heat exchange areaModifications using liquid coolingComplex mathematical operationsSteam condensationEngineering
The invention proposes a phase change heat storage device based on convective heat exchange and a method for determining key parameters thereof. The device includes a condensation sleeve and a shell of the phase change heat storage device; the shell of the phase change heat storage device is provided with a steam inlet, a condensation jacket Pipe interface, overflow valve and condensate pump; the steam inlet is located at the top corner of the shell of the phase change heat storage device; the condensate pump is located at the bottom corner opposite to the steam inlet; at least one set of The first steam channel plate and the second steam channel plate; the steam channel plate, the steam channel plate and the condensate level divide the inner cavity of the shell of the phase change heat storage device into a plurality of wave-shaped steam condensation channels; multiple condensation sleeves pass through The condensing sleeve interface is inserted in the shell of the phase change heat storage device; the axial direction of the condensing sleeve is parallel to the first steam channel plate; the condensing sleeve in each steam condensing channel is arranged in a wave shape along the height direction. The final design of the phase change heat storage device can be obtained through the parameter determination method, which reduces the demand for heat dissipation capacity.
Owner:NANJING UNIV OF SCI & TECH
A long-term high-efficiency passive containment cooling system using jet technology
ActiveCN106782698BImprove cooling efficiencyReduce evaporationNuclear energy generationCooling arrangementDischarge efficiencyLight pipe
The invention aims to provide a long-term efficient passive containment cooling system utilizing a jetting technique. A built-in heat exchanger of a containment and upper and lower pipe sections form a first-stage heat discharging system; an air cooler, a water tank baffle plate and a steam-air jet device in an external water tank form a second-stage heat discharging system of a cooling system; the steam-air jet device is located on the side wall surface of a gas space in the water tank and is used for introducing water steam produced by virtue of the first-stage heat discharging system into an ejector to jet air of the second-stage heat discharging system, so as to decrease the inlet temperature of the first-stage heat discharging system, so that the heat discharging efficiency of the system is improved; and a passive containment heat exchanger adopts an intensified heat exchange pipe and is located in the containment, the heat exchange pipe adopts a small-coil-pipe light pipe, and drainage plates are mounted on the periphery of the heat exchanger. According to the long-term efficient passive containment cooling system, when a crevasse accident occurs at a main cooling agent loop or a main steam pipeline, the internal heat in the containment can be efficiently taken away in a long term, so that the internal temperature and pressure of the containment can be below safety limit values for a long time under accident conditions.
Owner:HARBIN ENG UNIV
A long-term stable and durable hydrophobic coating and its preparation method and application
ActiveCN108977782BEnhanced condensation heat transferIncrease ionization rateVacuum evaporation coatingSputtering coatingMischmetalPhysical chemistry
The invention relates to the technical field of hydrophobic coatings, in particular to a long-term stable and durable hydrophobic coating and its preparation method and application. The long-term stable and durable hydrophobic coating includes a rare earth transition layer and a rare earth oxide coating, the rare earth transition layer is deposited between the substrate and the rare earth oxide coating, and the rare earth transition layer is made of rare earth metal The oxide coating corresponds to a rare earth metal, and the substrate is a metal substrate or a non-metal substrate. The hydrophobic coating of the present invention has good mechanical properties, thermodynamic properties and corrosion resistance, has long-term stability and durability, can be especially applied in harsh environments, and greatly promotes the application of hydrophobic rare earth oxide coatings in different fields.
Owner:HANGZHOU DIANZI UNIV
Passive safety system for inhibiting water hammer induced by steam condensation
ActiveCN112577333AEnhanced condensation heat transfer capacityInhibition formationSteam/vapor condensersSteam condensationWater hammer
The invention provides a passive safety system for inhibiting water hammer induced by steam condensation, which is used for inhibiting the steam condensation water hammer by installing a pore plate compartment at a pipe orifice of a heat pipe section. The pore plate compartment formed by splicing two pore plates is adopted, so that steam generated by a heat exchanger is condensed step by step in the pore plate compartment, and the phenomenon of the water hammer induced by the steam condensation in the heat pipe section due to violent condensation under low flow is fundamentally eliminated. Inaddition, the pore plate compartment avoids direct contact between steam and low-temperature seawater, the condensation heat exchange coefficient is reduced, and the water hammer of the steam on the seawater side is effectively restrained. The system has the advantages that the structure is simple, steam condensation induced water hammers on a pipeline and the seawater side can be restrained at the same time, and the application range is wide; and meanwhile, the improvement is convenient and easy, and engineering application is facilitated.
Owner:HARBIN ENG UNIV
Intelligent surface heat exchange tube with hydrophilic and hydrophobic conversion function and control system of intelligent surface heat exchange tube
PendingCN114485253AIncrease supplementImprove wettabilityHeat storage plantsCoatingsPhysicsElectrically conductive
The invention provides a hydrophilic and hydrophobic conversion intelligent surface heat exchange tube and a control system thereof, the inner surface of a base tube is divided into a spacer region and an intelligent surface region in the circumferential direction, an insulating layer I, a conductive layer, a porous layer and an insulating layer II are sequentially constructed in the intelligent surface region from the inner wall of the tube, and finally hydrophobic groups are electrified and sprayed on the insulating layer II. The exterior of the base tube is divided into a plurality of sections at equal intervals, thermocouples are welded to the upper end and the lower end of each section to monitor the temperatures of the upper end and the lower end of the section, the temperatures are fed back to a computer, and the computer adjusts currents of all the channels of the multi-channel direct-current power source to enable charged hydrophobic groups to move. And the inner surface of the pipe is subjected to hydrophilic-hydrophobic conversion in a spatio-temporal level. In the heat exchange process of the heat exchange tube, wettability transformation of the inner surface of the tube can be achieved according to different flow patterns, phase distribution in the tube is regulated and controlled, a multiphase flow structure and heat transfer are coordinated, and the heat transfer effect is improved.
Owner:ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
Small heat pipe and method for manufacturing the same
InactiveCN100362307CImprove yieldUniform surface temperatureIndirect heat exchangersCooling/ventilation/heating modificationsEngineeringMetal powder
This invention relates to a small heat pipe, which comprises tail end, pipe body, sinter layer and degassing end, wherein the tail end, pipe body and degassing end form the sealing cavity, and the inner wall of the pipe has a sinter layer; the sinter layer is absorbed working liquor. The method for manufacturing the heat pipe comprises the following steps: a) extruding one end of the pipe into a degassing pipe; b) inserting mandrel into the pipe, and the tapering of the mandrel must be inserted into the degassing pipe; c) filling metal powder into the gap between pipe inner wall and the mandrel; d) clinkering in high temperature to form sinter layer, cooling and getting the mandrel out; e) forming sealing tail end in the other end of the pipe; filling liquid heat-transfer agent, extracting air in the sealing cavity; f) grasping the degassing pipe, and then welding the end of the degassing pipe to form the degassing end.
Owner:嘉善华昇电子热传科技有限公司
An Absorption Refrigerator Condenser Based on Heat Tube Bundle with Enhanced Condensation
ActiveCN103697639BSimplify the design processSimplify the maintenance processEvaporators/condensersVacuum pressureEvaporation
The invention relates to an absorption refrigerator condenser based on a heat tube bundle with a coagulation strengthening function. The absorption refrigerator condenser comprises a vacuum pressure tank, the heat tube bundle, a guide fan housing and a guide exhaust fan, wherein the guide fan housing is fixed above the vacuum pressure tank; the guide exhaust fan is connected with the guide fan housing; the guide fan housing is not communicated with the vacuum pressure tank; heat tubes in the heat tube bundle are vertically arranged; the upper sections of the heat tubes are provided with condensation sections with outer fin structures; the lower sections of the heat tubes are evaporation sections with outer groove structures; the condensation sections are located inside the guide fan housing; the evaporation sections are located in the vacuum pressure tank. The defect caused by a water cooling heat exchanger in the absorption refrigerator condenser is avoided, and the absorption refrigerator condenser based on the heat tube bundle with the coagulation strengthening function has the advantage that the condensing effect is effectively strengthened, and belongs to the technical field of heat tube condensers.
Owner:SOUTH CHINA UNIV OF TECH
Method for enabling condensed liquid drops to be spontaneously expelled in horizontal direction
The invention discloses a method for enabling condensed liquid drops to be spontaneously expelled in the horizontal direction, which comprises the following steps: putting a glass sheet on flame to besmoked, then respectively putting the glass sheet, tetraethyl orthosilicate and an ammonia water solution into a drying container, vacuumizing, standing for 20-26 hours, then annealing the glass sheet for 1.5 to 3h under the condition of 500 DEG C to 600 DEG C, processing the annealed glass sheet by utilizing O2 plasma to obtain a substrate layer, respectively putting the substrate layer and perfluorooctyltrichlorosilane into a drying container, vacuumizing, standing for 1 to 3h, injecting a gradient electric field into the substrate layer by using an 8-12KV high-voltage power supply througha corona polarization method, and horizontally putting the substrate layer with the gradient electric field into a condensation environment, thereby achieving an effect of expelling condensed liquid drops. The method can effectively solve the problem that an existing expelling method is poor in condensate drop expelling effect.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
A Method for Spontaneously Dispelling Condensate Droplets in the Horizontal Direction
The invention discloses a method for spontaneously driving away condensed liquid droplets in the horizontal direction. The method comprises the following steps: placing the glass sheet on a flame for fumigation, and then separately dissolving the glass sheet, tetraethyl orthosilicate and ammonia solution Put it in a dry container and let it stand for 20-26h after vacuuming; then anneal the glass sheet at 500-600°C for 1.5-3h; use O 2 Plasma treatment of the annealed glass sheet to obtain the base layer, then respectively place the base layer and perfluorooctyltrichlorosilane in a dry container, vacuumize and let stand for 1‑3h; finally, use 8‑12KV high voltage power supply to pass The method of corona polarization injects a gradient electric field into the above-mentioned base layer, and puts the base layer with the gradient electric field horizontally into the condensation environment to realize the effect of driving away the condensate droplets. The method can effectively solve the problem of poor detachment effect of condensate droplets existing in the existing detachment method.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
A Passive Safety System to Suppress Water Hammer Induced by Steam Condensation
ActiveCN112577333BEnhanced condensation heat transfer capacityInhibition formationSteam/vapor condensersSteam condensationCondensation heat transfer
The invention provides a passive safety system for suppressing water hammer induced by steam condensation, which is used to suppress steam condensation water hammer by installing an orifice compartment at the nozzle position of a heat pipe section. The invention adopts the orifice compartment formed by splicing two types of orifice plates, so that the steam generated by the heat exchanger is condensed step by step in the orifice compartment, which fundamentally eliminates the occurrence of steam in the heat pipe section due to severe condensation under low flow rate Condensation induces water hammer. In addition, the orifice compartment prevents direct contact between steam and low-temperature seawater, reduces the condensation heat transfer coefficient, and effectively suppresses water hammer of steam on the seawater side. The invention has the advantages of simple structure, capable of suppressing water hammer caused by steam condensation on the pipeline and seawater side at the same time, and wide application range; at the same time, the invention is convenient and easy to improve, and is convenient for engineering application.
Owner:HARBIN ENG UNIV
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