322 results about "Phase change heat transfer" patented technology

The invention relates to the technical field of refrigerating systems, in particular to a micro-channel air conditioner phase change heat transfer evaporation heat exchanger. Comprising a flowing pipeline, the flowing pipeline is composed of a plurality of vertical pipelines and a plurality of bent pipelines connected with the vertical pipelines, and a continuous flowing path of a condensing agent is formed. And a mixing assembly specially used for stirring the condensing agent is arranged in the vertical pipeline. Fin assemblies are installed on the outer sides of the vertical pipelines, and the outer sides of the fin assemblies are wrapped by a complete shell. When the condensing agent flows in the flowing pipeline, the condensing agent can pass through the mixing assembly in each vertical pipeline to be fully mixed and uniformly distributed. The design ensures that the condensing agent in each vertical pipeline can reach an ideal uniform state. And then, the condensing agent flows through the fin assembly, and heat exchange is effectively carried out by utilizing the heat exchange area increased by the fins. By means of the layout, flowing of the condensing agent is optimized, and the heat exchange efficiency is remarkably improved.

Disclosed in the present invention is a heat dissipation structure integrating a heat dissipation plate and a phase change heat transfer device, comprising a heat dissipation plate and a vapor chamber. The heat dissipation plate is provided with a flow channel allowing for flowing of a dielectric material, an inlet allowing for flowing of the dielectric material into the flow channel, and an outlet allowing for flowing of the dielectric material from the flow channel. In addition, the upper end surface of the heat dissipation plate is further provided with an opening, and the vapor chamber is blocked on the opening in the upper end surface of the heat dissipation plate to directly perform contact heat transfer with the dielectric material in the heat dissipation plate. The present invention can efficiently solve the problem of insufficient heat exchange efficiency between the vapor chamber and a cooling medium material during composite heat dissipation of the vapor chamber and the heat dissipation plate, and effectively improve the cooling efficiency of the composite heat dissipation mode of the vapor chamber and the heat dissipation plate. Since the vapor chamber has high structural requirements, there is no need to make significant modifications to components, and in the present application, there is no need to change the internal structure of the vapor chamber, thereby making the production and processing easier to implement.

The gradually-expanded printed circuit board type heat exchange inner core comprises a cover plate, a bottom plate, a cold side plate layer and a hot side plate layer, a cold side gradually-expanded channel is of a flow channel structure with the width gradually expanded, and the sectional area of a flow channel dynamically adapts to gas-liquid phase change and volume change. And pressure drop fluctuation and bubble aggregation caused by gas phase expansion are reduced, the shunt channels and the divergent channels are arranged in parallel, an inner wall porous structure is combined, medium distribution uniformity is optimized through graded distribution and surface wettability enhancement, and the flow stability is remarkably improved. The turbulent flow ribs are arranged in the heat exchange channel on the heat side, combination of heterogeneous working media such as supercritical CO2-water and liquid hydrogen-liquid oxygen is supported by destroying a heat boundary layer, inducing turbulent flow and strengthening convective heat exchange and phase change heat transfer, the heat exchanger can improve the heat exchange efficiency while reducing pressure drop, compactness, reliability and wide working condition adaptability are considered, and the heat exchange efficiency is improved. Two-phase flow optimization and efficient heat exchange are achieved, and the extreme heat exchange requirements in the fields of aerospace, new energy and the like are met.

The invention belongs to the technical field of ocean engineering and water electrolysis hydrogen production. In order to solve the problems that a traditional water cooling system is large in size and low in heat dissipation efficiency, a multi-scale thermal sensing network is deployed to collect data; establishing a multi-phase-change cross-scale heat transfer model; constructing a two-stage gradient composite cooling module; constructing and optimizing a cooling decision algorithm; designing a cooperative control loop; deep reinforcement learning control is implemented; creating a functional surface; and constructing a dynamic optimization system. The characteristics of part of the steps are limited, efficient heat management can be achieved, and stable operation of the floating type offshore hydrogen production platform cooling system is guaranteed.

The invention relates to the field of new energy, and discloses a regional multi-energy complementary zero-carbon energy supply system coupling a reversible solid oxide battery technology and a closed CO2 network, which comprises an RSOC heat-mass-electricity reversible converter, a closed CO2 circulating network, renewable energy power, an external heat source, a chemical energy storage, a natural cold and heat source and a terminal energy consumption module. According to the invention, the RSOC bidirectionally operates in a power generation mode and an electrolysis mode, the coupling chemical energy storage module realizes regional multi-time scale energy balance, photovoltaic power generation supplies power to RSOC electrolysis and terminal users at the same time, and light condensation and heat collection and industrial waste heat in the external heat source module can be integrated with the RSOC module to reduce electrolysis power consumption. The closed CO2 network adopts pressurized low-temperature CO2 as a circulating working medium of the regional heating and cooling network, and RSOC waste heat and natural cold and heat resources can be fully utilized on the source side; the network heating and cooling capacity is greatly improved at the terminal through phase change heat transfer, passive cooling of a user is achieved, meanwhile, the water source heat pump is coupled to meet the heating power requirements of different grades, and net zero carbon emission is achieved in the whole process.

The invention discloses a joint heat dissipation structure and a robot in the technical field of robots. The joint heat dissipation structure comprises a joint, the joint is provided with a shell, a containing cavity is formed in the inner side of the shell, a motor is fixedly arranged in the containing cavity, the joint heat dissipation structure is further provided with a heat dissipation assembly used for reducing the temperature in the containing cavity, the heat dissipation assembly is a pulsating heat pipe, and the pulsating heat pipe comprises an evaporation section and a condensation section. The evaporation section is attached to the outer wall of the motor, and the condensation section is attached to the inner wall of the shell. The pulsating heat pipe is used for heat dissipation, based on the phase change heat transfer principle, no extra fan or pump is needed, self-oscillation flowing is achieved completely through thermal driving, and the overall energy consumption of the robot is remarkably reduced. The pulsating heat pipe is small in occupied space, light in weight, simple in structure, low in maintenance cost and suitable for long-term operation, and joint movement flexibility and load capacity are effectively improved; the condensation section is attached to the inner wall of the shell, the joint shell can be heated while heat dissipation is conducted, and the warm touch feeling can be provided without extra energy consumption.

The invention discloses a graphite electrode cooling device of a graphitization furnace, the graphitization furnace and a cooling method, and relates to the technical field of graphite electrode cooling, the graphite electrode cooling device of the graphitization furnace comprises a cooling mechanism, the cooling mechanism comprises an adhesion layer and a plate type heat pipe, an adhesion layer is arranged on the surface of the graphite electrode exposed outside the graphitization furnace, the plate type heat pipe is arranged on one side, far away from the surface of the graphite electrode, of the adhesion layer, the plate type heat pipe comprises a sealing shell, a medium cavity is formed in the sealing shell, a capillary core layer is arranged on the inner wall of the medium cavity, and a cooling medium is stored in the medium cavity; according to the graphite electrode cooling device of the graphitization furnace, the plate type heat pipe is attached to the surface of the exposed graphite electrode, circulating water cooling is not needed, phase change heat transfer of a cooling medium is utilized, the heat dissipation efficiency is improved, phase change heat transfer is not conducted under the low-temperature condition, and invalid heat exchange is avoided.

The invention discloses a phase change heat transfer motor stator heat dissipation structure and a design method, and belongs to the technical field of motor heat management, the structure comprises a stator iron core, a copper wire winding and a flattening type phase change heat transfer device, the copper wire winding is arranged on the inner side of the stator iron core, and the flattening type phase change heat transfer device is arranged on the outer side of the stator iron core; the flattening type phase change heat transfer device is arranged in a groove, in contact with the stator core, in the radial interior of the copper wire winding. The invention further discloses a design method of the heat dissipation structure. By adopting the heat dissipation structure and the design method, the thermal control technology of the motor stator winding is researched and developed based on the phase change heat transfer device, and the purposes of greatly reducing the peak temperature of the motor, enhancing the temperature uniformity of the motor and realizing high-overload-multiple safe operation are achieved.

The invention relates to a high-power water-cooling permanent magnet synchronous motor for engineering machinery, in particular to a high-efficiency heat dissipation motor system adopting a double-heat-pipe coupling cooling structure, which is characterized in that array flat heat pipes and high-speed working condition self-backflow rotating heat pipes are respectively integrated in a stator and a rotor, so that stator-rotor double-channel, phase-change and rapid heat conduction is realized; and the thermal control capability and reliability of the motor are improved. According to the motor, a plurality of ultrathin flat heat pipes are symmetrically arranged on the outer circle of a stator and are in one-to-one correspondence with winding notches, so that a rapid and efficient stator heat conduction path is formed; and meanwhile, the hollow rotating shaft made of sintered copper powder is designed into a rotating heat pipe structure, so that the heat of the rotor can be quickly transferred to the water-cooling casing through a bearing area, and the efficient cooling of the rotor assembly is realized. The double-heat-pipe structure constructs a stator and rotor independent heat dissipation channel through a phase change heat transfer mechanism, motor size constraint is not changed, temperature rise of windings and permanent magnets is remarkably reduced, heat balance and system stability are improved, and the double-heat-pipe structure is particularly suitable for high-load working conditions such as engineering machinery.

The invention relates to the technical field of heat exchange modules, and discloses a phase change efficiency evaluation method, device and equipment of a micro-channel heat exchange module and a medium, and the method comprises the steps: carrying out the data collection of the micro-channel heat exchange module, and obtaining a multi-dimensional sensing data set, carrying out nonlinear zero-order heat conduction coupling calculation and first-order phase change coupling calculation on the multi-dimensional sensing data set to obtain a nonlinear multi-order coupling phase change heat transfer model; performing empirical mode decomposition and feature extraction to obtain target phase change feature data; establishing an optimization objective function containing a phase change efficiency calculation item and a heat exchange performance calculation item, and performing particle swarm optimization calculation based on the optimization objective function to obtain coupling parameter optimization data; and inputting the target phase change characteristic data and the coupling parameter optimization data into the phase change efficiency prediction model for processing to obtain phase change efficiency prediction data, thereby realizing optimal configuration of the phase change efficiency calculation item and the heat exchange performance calculation item, and realizing omnibearing monitoring of the performance of the heat exchange module.

The invention belongs to the related technical field of phase change heat transfer, and discloses an ultra-thin vapor chamber, a preparation method thereof and electronic equipment, and the ultra-thin vapor chamber is characterized in that a first accommodating groove is formed in one side of an upper cover plate, and a second accommodating groove is formed in one side of a lower cover plate; a plurality of first cylinders are arranged in the first area in an array mode in the first containing groove, and vapor-liquid different-face type liquid absorbing cores are arranged at the positions, corresponding to the first cylinders, in the second containing groove; the interior of the first containing groove and the interior of the second containing groove are respectively provided with supporting column structures which correspond to each other up and down in the second area. A plurality of gap areas are arranged in the supporting column structure, and any gap area is provided with a vapor-liquid coplanar wick. The vapor-liquid different-plane structure and the vapor-liquid coplanar structure are comprehensively utilized, the phase change heat transfer heat resistance is reduced due to the large contact area of the vapor-liquid different planes, the vapor flow resistance of the heat insulation section is reduced due to vapor-liquid coplane, and the heat dissipation capacity of the ultrathin vapor chamber can be improved under the condition that the thickness of the inner cavity is extremely small.

The invention belongs to the field of phase change heat storage, and discloses a phase change heat exchange fin parameter optimization method and a related device.According to the method, a three-dimensional parameterized model of a tree-shaped fractal fin containing the length ratio, the width fractal dimension and the fin number is established, representative parameter sample points are efficiently generated through Box-Behnken experimental design, and the representative parameter sample points are optimized; and a liquid phase rate and a total heat storage capacity response value are obtained by combining numerical simulation of phase change heat transfer, and multi-target parameter global optimization is realized based on a second-order polynomial regression model. By the adoption of the method, optimization efficiency and precision are remarkably improved, on the premise that a large number of repeated experiments or simulations are not needed, the optimal fin structure parameters capable of cooperatively strengthening heat conduction, promoting melting of the phase-change materials and maximizing the heat storage capacity are rapidly obtained, and a reliable design basis is provided for engineering application of the fractal fin strengthening phase-change heat storage technology.

The invention relates to the technical field of phase change heat transfer, and particularly discloses a multi-field coupling enhanced phase change heat transfer visualization experiment research device which comprises a vacuum cavity provided with a heat exchange block mounting hole, an auxiliary cooling device mounting hole, first to fifth thermocouple mounting holes, a wire mounting hole, an electric field, a magnetic field mounting position and an electromagnetic wave incident port. The heat exchange block is mounted in the heat preservation sleeve; the auxiliary cooling device is mounted in the auxiliary cooling device mounting hole; a heating rod mounting hole is formed in the bottom of the end cover; the heating rod is mounted in the heating rod mounting hole; the heat preservation sleeve is installed in the heat exchange block installation hole and provided with an ultrasonic oscillation generating device installation position. The electric field-magnetic field generating device is provided with an electric field generating device and a magnetic field generating device. The influence of the superheat degree and the supercooling degree on enhanced thin liquid film boiling heat transfer and enhanced condensation heat transfer can be researched by changing the heating rod and the heat exchange fluid flow.

The invention discloses an immersion phase change cooling device and cooling method for a net-forming type energy storage converter. The device comprises a power module phase change cooling unit, a condensation module, a liquid storage tank and a heat exchanger, the power module heating element is soaked in a refrigerant of the power module phase change cooling unit, the refrigerant absorbs heat and is heated to generate phase change vaporization, and a liquid refrigerant is converted into a gas refrigerant to be used for reducing the temperature of the power module heating element. A gaseous refrigerant flows to a condensation module, the condensation module exchanges heat with the gaseous refrigerant, so that the gaseous refrigerant is converted into a liquid refrigerant through phase change, and the liquid refrigerant flows to a heat exchanger and exchanges heat with air in the cabinet to reduce the temperature of elements in the cabinet; and the liquid refrigerant continues to flow into the power module phase change cooling unit to cool the power module, so that the immersion phase change cooling circulation process of the structure network type energy storage converter is realized. According to the invention, through phase-change heat exchange, the heat dissipation problem of sudden increase of heat consumption caused by short-time multi-time overload of the grid-forming type energy storage converter is solved, and the heat dissipation efficiency and reliability are improved.

The invention relates to the technical field of liquid nitrogen jet precooling, in particular to a low-temperature cold air generating device and a liquid nitrogen jet system.The low-temperature cold air generating device comprises a shell, and a plugging cone is arranged in the shell; an annular cavity is formed between the plugging cone and the inner wall of the shell, and a plurality of flow equalizing plates are arranged in the annular cavity; a liquid collecting ring is arranged on the shell in the circumferential direction, and the liquid collecting ring is connected with a liquid nitrogen source; and a plurality of jet holes are formed in the shell corresponding to the liquid collecting ring. The low-temperature cold air generating device is arranged to be in a side spraying mode of the annular wall face, so that in the whole low-temperature cold air generating process, liquid nitrogen does not make direct or indirect contact with air before entering the device; the problems of insufficient utilization of latent heat, poor two-phase flow stability of liquid nitrogen in the pipe and large structural local stress caused by heat exchange between the liquid nitrogen and air before spraying of the spraying holes are effectively solved, meanwhile, the device can meet the requirement of a scene with the high requirement for miniaturization of the device, and the application range is wide. The problems that an existing low-temperature cold air generating device is poor in phase change heat transfer and mass transfer uniformity and low in heat exchange efficiency are solved.

The present invention relates to a Tesla valve-type ultra-thin planar thermal diode based on phase change heat transfer technology. The diode comprises a tube body, within which are disposed an evaporation end, a liquid working fluid cavity, a Tesla valve flow channel, a liquid wick filled with liquid working fluid, and a condensation end. The wick is disposed within the liquid working fluid cavity. The condensation end, the wick, and the evaporation end are sequentially connected to form a liquid working fluid path, while the evaporation end, the Tesla valve flow channel, and the condensation end are sequentially connected to form a gaseous working fluid path. The Tesla valve utilizes the fluid acceleration characteristics and unidirectional conductivity of the fluid to improve the unidirectional thermal conductivity of the ultra-thin planar thermal diode. During forward heating, the gaseous working fluid flows from the evaporation end to the condensation end, flowing downstream within the Tesla valve with low air resistance and high thermal conductivity. During reverse heating, the gaseous working fluid flows from the condensation end to the evaporation end, flowing countercurrently within the Tesla valve with high air resistance and low thermal conductivity, thereby achieving the effect of a thermal diode. The diode can be widely used in the microelectronics industry.

The invention discloses a subtractive etching micro-nano multistage rough structure copper surface for strengthening boiling heat transfer and a preparation method thereof, and relates to the technical field of micro-nano composite structure strengthening phase change heat transfer. The etched micro-nano multistage coarse structure completely covers the surface of the copper substrate, the micro-nano multistage coarse structure comprises micron-scale concave cavities, nano-scale concave cavities / holes and nano-scale granular bulges, and the micron-scale concave cavities, the nano-scale concave cavities / holes and the nano-scale granular bulges jointly form a multistage structure; performing ultrasonic cleaning on the target metal substrate by using a cleaning solution; and a mixed aqueous solution of ammonium persulfate and chlorate is used as an etching solution, and the cleaned target metal substrate is left to stand in the etching solution for etching. And after the etching is finished, cleaning to obtain the etched micro-nano composite rough structure surface. Ammonium persulfate and chlorate are used as solutes, and the mass ratio of the solutes to the solvent is 1: 3. The mass ratio of the ammonium persulfate to the chlorate in the solute is (1: 9)-(3: 7). The method has high production efficiency, shows good thermal stability in a boiling test, and is beneficial to industrial large-scale application and production.

The invention discloses a flue gas waste heat utilization system based on a vacuum heat pipe technology and an optimized operation method thereof, and the system combines supercritical water gasification, synthesis gas combustion power generation and vacuum heat pipe waste heat recovery to form an efficient integrated energy conversion system. The system core comprises a supercritical water gasification reactor, a combustor, a supercritical turbine and a waste heat recovery network composed of high-temperature, medium-temperature and low-temperature vacuum heat pipes, and is coupled with an organic Rankine cycle to achieve deep utilization of low-grade heat energy. The vacuum heat pipe is of a sectional type structural design, thorough isolation of the smoke side and the water side is achieved, rapid heat transfer is completed under the small temperature difference based on self-circulation formed by phase change heat transfer of an internal medium and capillary force driving, and gradient utilization of smoke waste heat is achieved. Through optimal matching of the vacuum heat pipe network and the supercritical water gasification power generation system, the technical problems that a traditional waste heat recovery device is low in heat exchange efficiency and prone to ash deposition corrosion are solved, and the comprehensive energy efficiency of the system is improved.

The invention relates to the technical field of new energy automobile heat management, in particular to an R290 integrated secondary loop energy efficiency improving heat management system for an electric automobile, which comprises a refrigerant side loop and a water side loop, the refrigerant side loop is filled with an R290 refrigerant and used for achieving refrigerant circulation phase-change heat exchange. The water side loop comprises a passenger compartment water loop, a battery water loop and a motor water loop; the passenger compartment water loop is filled with a coolant and is used for exchanging heat with a passenger compartment and adjusting the temperature of the passenger compartment; the battery water loop is filled with a coolant and is used for carrying out heat management on the battery and realizing absorption and transfer of battery heat; the motor water loop is filled with a coolant and is used for cooling the motor and maintaining the working temperature of the motor; the coolant in the water side loop and the R290 refrigerant in the refrigerant side loop are located in different pipelines.

The invention belongs to the technical field of 3C product manufacturing, and discloses a phase change heat transfer middle frame and a manufacturing method thereof.The phase change heat transfer middle frame comprises a middle frame body, and a plurality of through holes are formed in the surface of the middle frame body; the phase change heat transfer part is installed on the inner wall of the middle frame, and the phase change heat transfer part is used for conducting uniform heat dissipation on the interior of the middle frame; the phase change heat transfer component comprises two adaptive frames and a phase change heat transfer mechanism located in the centers of the two adaptive frames. The phase change heat transfer mechanism comprises a pipeline, and a mounting assembly, an evaporator, a liquid storage device and a condenser which are respectively mounted on the pipeline, through the cooperation of the middle frame, the pipeline, a capillary structure and other structures, rapid and uniform heat dissipation is realized, and the problems that an existing device is difficult to conduct heat to a screen through a hinge, and the heat dissipation effect is poor are solved. Although the heating element has basic heat conduction capability, the heating element is limited by the characteristic of poor temperature uniformity, and heat is easy to accumulate at the corresponding position of the heating element.

The invention relates to the technical field of copper pipe heat dissipation, in particular to a micro-channel heat dissipation device based on a copper pipe structure, which comprises a heat dissipation substrate, a copper pipe type heat dissipation channel and a liquid cooling circulation system, the copper pipe type heat dissipation channel is composed of a plurality of plastic copper pipes and replaces a traditional micro-channel or vapor chamber structure. The copper pipe is embedded or fixed in the heat dissipation substrate or on the surface of the heat dissipation substrate, cooling liquid circulates in the copper pipe, and efficient heat dissipation is achieved through the combined action of forced convection heat exchange and heat transfer; the copper pipe has good plasticity and can be subjected to three-dimensional bending forming according to heat source distribution and spatial layout, through the synergistic effect of forced convection and phase change heat transfer, the heat transfer efficiency is improved, particularly, extremely high local heat flow density can be coped, the chip is effectively prevented from being overheated, and the heat transfer efficiency is improved. The heat dissipation channel can be bent and formed in a three-dimensional space according to heat source distribution, accurate matching with the heat source form is achieved, limitation of traditional plane heat dissipation is broken through, and optimal configuration of heat dissipation capacity and heat flux density is achieved.

The invention relates to the technical field of electronic component heat dissipation, and discloses a micro-fluidic regulation liquid drop overheating surface heat dissipation device based on intelligent monitoring, which comprises an electrode plate body, an electrowetting surface is arranged above the electrode plate body, a plurality of liquid drops are arranged on the electrowetting surface, and the electrode plate body is connected with an external control circuit module. The liquid drops and the electrode plate body form a conductive path; the control system comprises a control module and a temperature acquisition module, the temperature acquisition module is used for acquiring the environmental space temperature, the control module is connected with the external control circuit module, and when the acquired temperature exceeds a set temperature threshold value, the control module controls the electrode plate body to form an electric field gradient through the external control circuit module, so that the liquid drops move towards an overheated point, and the liquid drops are heated. And the liquid drops absorb heat through evaporation. The liquid drop migration speed is remarkably increased, the system adopts a phase change heat transfer mechanism, evaporation or boiling replaces sensible heat transfer, and the unit area heat dissipation efficiency is remarkably improved compared with a traditional scheme.

The invention belongs to the technical field of aluminum-silicon-based metal materials, and particularly relates to a high-thermal-conductivity composite metal material and a preparation method and application thereof, and the high-thermal-conductivity composite metal material is suitable for heat dissipation requirements of 5G communication equipment, electric vehicle power batteries, spacecraft thermal control systems and the like. A nanocrystalline aluminum alloy matrix is formed by aluminum, magnesium, silicon, scandium and other metal elements, and the problems of anisotropy, obvious thermal response lag, obvious poor cycling stability, boiling critical phenomenon and the like do not exist; meanwhile, the nanocrystalline aluminum alloy matrix comprises a high-density dislocation grid, so that the overall heat transfer efficiency is further improved; in addition, a micro-channel is formed in the nanocrystalline aluminum alloy matrix, liquid metal is poured into the micro-channel to serve as a phase change working medium, and therefore the synergistic effect of active heat transportation and passive heat conduction is achieved. The catalyst layer is used for promoting evaporation-condensation circulation of liquid metal and strengthening phase change heat transfer of a liquid metal working medium; the interface bonding and wettability are enhanced, and the attachment of liquid metal and the channel wall is improved; and phase change working medium oxidation and side reaction are inhibited.

The invention relates to the technical field of cabinet cooling, and particularly discloses a dual-cooling type communication base station cabinet, which comprises a cabinet body, a circulating cooling unit arranged at the top of the cabinet body and a conduction cooling unit arranged at the side part of the cabinet body, active forced exhaust of the circulating cooling unit and passive heat exchange and phase change heat transfer of the conduction cooling unit are combined, so that the dual cooling effect is improved; when the ventilation net plate is blocked due to moisture, and the exhaust efficiency in the air inlet cover is reduced, the trigger piece automatically starts the driving piece, the driving piece is linked with a rotating shaft of the motor, the vibrating piece is driven to vibrate meshes of the ventilation net plate up and down in a reciprocating mode, hardened blocks are promoted to be broken, and meanwhile the friction piece is driven to conduct transverse reciprocating friction on the ventilation net plate. And the trigger part disconnects the driving part until the discharge efficiency is recovered and the temperature is reduced to a normal range, so that the meshes are effectively prevented from being blocked, smooth air inlet is maintained, and the maintenance requirement is reduced.

The invention relates to a heat input end gradient foam metal enhanced axial oscillation heat pipe grinding wheel and a preparation method thereof. The grinding wheel mainly comprises a base body, a cover plate, a cutter bar, a working medium, an abrasive layer and gradient foam metal. The matrix is optimally designed and manufactured by combining a lattice structure and a 3D printing technology, and gradient foam metal is embedded in the position, corresponding to a heat input end, of an oscillating heat pipe runner. The aperture and porosity of the gradient foam metal are gradually increased from the flow channel wall face to the flow channel center direction, the hydrophilicity is gradually weakened, and a hollow horn-shaped structure with the material thickness gradually increased vertically downwards along the axis of the grinding wheel is formed. In the grinding process, due to the porous structure characteristic of the gradient foam metal in the grinding wheel, the vaporization core density in a flow channel is increased, meanwhile, bubble separation in the nucleate boiling process is accelerated, phase change heat transfer in a pipe is promoted, and the local dry-out phenomenon is effectively avoided. The grinding wheel structure can remarkably improve the heat dredging capacity and the working stability.

The invention discloses an intelligent temperature control vacuum cup based on a phase change material and a preparation method thereof, the intelligent temperature control vacuum cup comprises a cup body, the cup body is composed of an inner container and a stainless steel shell, and a heat transfer layer is arranged between the inner container and the stainless steel shell; the phase change heat transfer assembly is arranged in the heat transfer layer and used for heat transfer between the inner container and the stainless steel shell; the heat transfer control assembly, the temperature display heat preservation assembly and the control assembly are arranged below the inner container, and the heat transfer control assembly and the temperature display heat preservation assembly achieve temperature monitoring, temperature display and phase change heat transfer under regulation and control of the control assembly. In actual use, through the phase change heat transfer assembly and the heat transfer control assembly, the problems that a vacuum cup in the current market mainly relies on a vacuum heat insulation layer to slow down heat loss, the temperature control mode is single and passive, and the heat conduction efficiency cannot be dynamically adjusted according to the liquid temperature are solved; a user does not need to manually open a cover for heat dissipation or help external cold water for auxiliary cooling, operation is easy, and the scalding risk is avoided.

The invention relates to an experimental system for researching heat transfer characteristics of a cold energy power generation coiled tube heat exchanger. Comprising a working medium storage tank, a first pump with a feeding port communicated with a discharging port 1a of the working medium storage tank, a liquid nitrogen heat exchanger with a first feeding port 3a communicated with a discharging port of the first pump and a condenser with a first feeding port 4a communicated with a first discharging port 3b of the liquid nitrogen heat exchanger, and a first discharging port 4b of the condenser is communicated with a feeding port 1b of the working medium storage tank. The liquid nitrogen heat exchanger is a coiled tube type heat exchanger. By adopting the technical scheme of the invention, the method can be used for researching the phase change heat transfer process of shell pass evaporation and condensation, accurately obtaining the phase change heat transfer rule of the working medium in the coiled tube type heat exchanger, and exploring the factors of the coiled tube type heat exchanger influencing the heat transfer coefficient and the pressure drop and the distribution rule of shell pass phase change flow; the feasibility research of the coiled tube type heat exchanger in LNG cold energy power generation is realized, and the blank that the coiled tube type heat exchanger is used as a condenser in an LNG cold energy power generation device in the prior art is filled.

The present invention relates to the field of new energy, and discloses a regional multi-energy complementary zero-carbon energy supply system that couples reversible solid oxide cell technology with a closed CO2 network, including RSOC thermal-mass-electricity reversible conversion, a closed CO2 circulation network, renewable energy power, an external heat source, chemical energy storage, natural cold and heat sources, and end-use energy modules. In the present invention, the RSOC operates bidirectionally in the power generation and electrolysis modes, and couples with the chemical energy storage module to achieve regional multi-time-scale energy balance. Photovoltaic power generation supplies power to both the RSOC electrolysis and end users simultaneously. In the external heat source module, concentrating solar heat collection and industrial waste heat can be integrated with the RSOC module to reduce the electrolysis power consumption. The closed CO2 network uses pressurized low-temperature CO2 as the circulating working fluid for the regional heating and cooling network. It can fully utilize the waste heat of the RSOC and natural cold and heat resources on the source side; at the end, it greatly improves the heating and cooling capacity of the network through phase change heat transfer to achieve passive cooling of users, and at the same time couples with a water source heat pump to meet different-grade heating demands, with net zero carbon emissions throughout the process.

A heat transfer device for integrating with a backlight unit for an edge-lit motor vehicle display apparatus includes an anterior capillary tube operable to integrate with a rear side of the backlight unit, the anterior capillary tube further operable to dissipate heat from an anterior of a backlight unit of a motor vehicle display. The heat transfer device further includes a posterior capillary tube operable to be positioned away from the backlight unit, the posterior capillary tube further operable to dissipate heat from a posterior of a backlight unit of a motor vehicle display. The heat transfer device further comprises a phase changing medium operable to fluidly transfer between the first capillary tube and the second pillar tube during a heat transfer process, where the phase changing medium is operable to phase change between a gaseous state and a liquid state during the heat transfer process.

The invention discloses a surface plasmon resonance radiation cooling-heat conduction-liquid film evaporation coupling heat dissipation multi-layer co-construction micro-nano structure and a manufacturing method and application thereof, and belongs to the technical field of micro-nano manufacturing and functional structure surfaces, and the multi-layer co-construction micro-nano structure is composed of three layers of structures; the bottom layer structure is a substrate; the top of the bottom layer structure is a near-infrared wavelength scale grating structure; the middle-layer structure is a high-thermal-conductivity diamond film and covers and fills the bottom-layer structure; the top of the middle-layer structure is of a lyophilic micro-nano structure; the top layer structure is a silicon dioxide film. Radiation cooling, efficient heat conduction and liquid film evaporation / boiling phase change heat transfer are coupled, the heat transfer and heat dissipation level is greatly improved, additional external energy input is not needed, and positive significance is achieved for research and development of a novel high-performance and zero-energy-consumption radiator, promotion of development of a high-heat-flow-density advanced system and improvement of the ecological environment.