56results about How to "Achieve heat transfer performance" patented technology

The invention discloses a device for continuously producing carbon nanotubes, which consists of a feeder, a reduction reactor, a synthesis reactor and a product collector which are connected in series in turn, wherein the reduction reactor is a fluidized bed reactor; and the synthesis reactor is a spouted bed reactor. The invention also discloses a process method for continuously producing carbonnanotubes based on the device. The catalyst reduction and deposition preparation of the carbon nanotubes are respectively realized by the fluidized bed and the spouted bed, so that the process conditions can be regulated in a wider range, the fluidized state of agglomerated nanoparticles in the beds is ensured, and the high-quality carbon nanotubes are continuously produced.

The invention discloses an all-in-one device for evaporation/condensation heat transmission testing in a micro pipe and a testing method thereof. The device comprises a refrigerant circuit and a heat exchange circuit in testing section, wherein the refrigerant circuit comprises a recovery tank, a power pump, a regulating valve, a refrigerant mass flow meter, a regulating testing circuit in parallel composed of a condensation preheating passage and an evaporation preheating passage, a inner pipe in testing section and a condenser; a inlet of the power pump is connected with the recovery tank; an outlet is connected with the refrigerant mass flow meter; the inlet of the regulating testing circuit in parallel is connected with the refrigerant mass flow meter; the outlet of the regulating testing circuit in parallel is connected with the inner pipe in testing section; a refrigerant outlet of the inner pipe in testing pipe is connected with the condenser; and the heat exchange circuit in testing section comprises a outer pipe in testing section and a heat exchanger, a water heater, a water pump and a water mass flow meter in sequent communication. By using the power pump to control the refrigerant flow and using the evaporation preheater/condensation preheater to control the dryness of the refrigerant and using the heat exchange circuit in testing section to control the heat exchange in the testing section, the invention respectively realizes evaporation and condensation heat transmission testing in a micro pipe.

The invention discloses a preparation method for active dendrobium candidum superfine powder. The preparation method comprises steps: first, leaves of harvested fresh dendrobium candidum are removed, and washing and draining are carried out; second, punching is carried out, the dendrobium officinale is fixed on a die, the die is placed on a shelf of a vacuum drying container, cooling is carried out, the die is a cube-shaped metal die body (1) with an upper surface equipped with a half-cylindrical groove (2), and small holes (3) are arranged in the die body; third, vacuum-pumping is carried out; fourth, the shelf is heated, the temperature is risen to 0 DEG C, the pressure intensity is kept at 20-100Pa, drying is carried out, the material temperature is risen from 0 DEG C to 20 DEG C, the pressure intensity is kept at 10-20Pa, drying is carried out, the material temperature is risen from 20 DEG C to 40 DEG C, the pressure intensity is kept within 10Pa, drying is carried out, pressurization to a normal pressure is carried out; fifth, low temperature air-flow crushing is carried out, and active dendrobium candidum superfine powder is obtained and more than 95% of active dendrobium candidum superfine powder has a particle size of being less than 20 micrometers. The freeze-drying rate is high, freeze-drying time is saved, energy consumption is lowered, the product has a small particle size and is easy to dissolve and absorb, and the bioavailability is high.

The invention relates to a nanofluid-based system for improving the solar thermoelectricity generating efficiency. The nanofluid-based system comprises a nanofluid-based direct absorption type vacuum pipe heat collecting system, a nanofluid-based heat storage pool, a nanofluid-based cold end radiator, a thermoelectric device heat end heat exchanger and a thermoelectricity generating system; the nanofluid-based direct absorption type vacuum pipe heat collecting system is connected with the nanofluid-based heat storage pool through a pipeline; the nanofluid-based heat storage pool is connected with the thermoelectric device heat end heat exchanger through a pipeline; the thermoelectric device heat end heat exchanger and the thermoelectricity generating system are directly installed together; the nanofluid-based cold end radiator is a radiator of the thermoelectricity generating system; and the nanofluid-based cold end radiator and the thermoelectricity generating system are connected together through a pipeline. By means of the nanofluid-based system for improving the solar thermoelectricity generating efficiency, integration of heat absorption, transfer and storage is achieved, a heat exchanger is omitted in the solar optothermal absorption, storage and conveying processes, the heat exchange link is simplified, and thermal energy losses are decreased.

The invention belongs to the technical field of steel making, and particularly relates to continuous casting crystallizer casting powder for 400 stainless steel. The continuous casting crystallizer casting powder for 400 stainless steel comprises the chemical components of, by weight percentage, 35-40% of CaO, 40-48% of SiO2, 2.0-4.0% of Al2O3, 8-10% of Na2O, 5-8% of F- and 1-2% of solid C. The chemical components of the continuous casting crystallizer casting powder for 400 stainless steel are used cooperatively, a proper smelting speed is kept while the heat preservation function is guaranteed, and an obtained casting blank is smooth in surface, regular in folding mark and free of concaves or other quality problems.

The invention discloses a novel rapid cooling hydrogen tank. The novel rapid cooling hydrogen tank comprises, from the upper part to the lower part, a liquid collecting plate, a liquid dropping plate, a separating plate, and a redistributing sieve plate; a center opening of the liquid collecting plate is provided with a traverse baffle; a center opening of the liquid dropping plate is provided with a liquid collecting groove; a cold hydrogen pipe coiled pipe is arranged in the liquid collecting groove; a center opening of the separating plate is provided with a mixing pipe; the center of the redistributing sieve plate is provided with a diversion cone; and the periphery of the diversion cone is provided with small holes. The novel rapid cooling hydrogen tank is provided with the liquid collecting groove, and the liquid collecting groove is used for collecting liquid phase materials of an upper bed layer; the cold hydrogen pipe is arranged in the liquid phase materials in the liquid collecting groove in a coiled manner, cold hydrogen is sprayed out from the cold hydrogen pipe so as to stir and bubble the liquid phase materials, the relatively high temperature difference of the cold hydrogen and the liquid phase materials is used for enhancing gas-liquid heat transferring, heat is transferred from the liquid phase materials to the cold hydrogen, and then the cold hydrogen is mixed with oil gas for heat transferring, so that heat exchange efficiency of the novel rapid cooling hydrogen tank is increased greatly.

The invention discloses a phase-change composite material filled with graphene nanosheets and a preparation method. The preparation method for the phase-change composite material filled with graphenenanosheets is characterized by comprising the following steps: (step 1) n-octadecane solid which already undergoes drying pretreatment is completely melted; (step 2) graphene nanosheets and superdispersant are added into liquid-phase n-octadecane according to a proportion, so that a mixed suspension is obtained; (step 3) an agitator is used for agitation, so that the suspension is uniformly mixed;(step 4) the uniformly mixed suspension is poured into an ultrasonic cleaner and ultrasonically oscillated, so that the graphene nanosheets are formed into a stable three-dimensional heat conductionnetwork structure inside n-octadecane; (step 5) the suspension obtained in step 4 is naturally cooled to be solidified, and thereby the phase-change composite material with n-octadecane as a matrix which is filled with the graphene nanosheets is obtained. The phase-change composite material and the preparation method disclosed by the invention can be widely applied in fields, such as energy.

The invention discloses a combined thermal shielding structure for a vertical pump of conveying a high-temperature medium. The structure comprises a low-pressure heat pipe, a forced heat exchange pipe and a liquid level meter. A thermal shielding device is a combined structure of the forced heat exchange pipe and the low-pressure heat pipe. The forced heat exchange pipe is installed in the low-pressure heat pipe. A medium in the heat pipe is subjected to phase change after being heated, is condensed when ascending to the top end of a low-pressure cavity and meeting the heat exchange pipe, and falls to the bottom of the low-pressure cavity under the effect of gravity. When the heat exchange pipe is broken, the internal medium is leaked into the heat pipe, so that the medium in the heat exchange pipe is prevented from leaking into the pumped medium to cause pollution. The liquid level meter is mounted in the low-pressure cavity; and when the heat exchange pipe is broken, the liquid level rises, and the liquid level meter detects an ultrahigh liquid level signal and monitors if the heat exchange pipe is broken. When the temperature of the pumped medium is changed, the flow of a cooling medium in the heat exchange pipe is adjusted to realize adjustment of heat exchange quantity so as to guarantee such installed parts as a shaft seal after thermal shielding to be located at a relatively stable temperature.

The invention relates to a penetration type concave-convex blade rotor inside a heat exchange pipe. The penetration type concave-convex blade rotor inside the heat exchange pipe is formed by hollow shafts and spiral blades; groove structures are formed in back water sides of the spiral blades along the spiral directions of the blades; holes are formed in cross sections of the blades; the holes extend along the spiral directions of the blades to penetrate the whole blades to form into penetration holes; flow disturbance shafts namely projections are formed by the wall thickness of the penetration holes on the blades. The perturbance of the flow disturbance shafts and the concave-convex fluctuation functions of the grooves which are formed in the back water sides of the blades continuously act on the heat transmission fluid along the facing water sides, so that the radial speed and the tangential speed of the fluid on two sides of the blades are increased and the flow disturbance effect is increased. According to the penetration type concave-convex blade rotor inside the heat exchange pipe, the rotor can play a good self-centering role during rotating in the fluid due to the fact that the fluid has a suspension force function on the penetration holes when flowing through the penetration holes, scrapping between the blade tops and the pipe walls is avoided, the service life of the rotor is prolonged, mass and energy exchange between fluids inside the pipe is greatly enforced due to the separation effect of the penetration holes, and antiscale, descaling and heat transmission reinforcement functions are achieved.

The invention discloses a heat pipe radiator integrated with heat transmission and heat radiation and a manufacturing technology thereof. The heat pipe radiator adopts a long thin heat pipe with the pipe diameter of 2mm to 5mm; the long thin heat pipe is coiled in a spiral form; when the heat pipe radiator is in use, a part of each annular part of the heat pipe contacts with a heat source to form a heat absorbing section; other parts which do not contact with the heat source are used as heat-transmission heat-radiation sections; the heat transmission of heat pipe internal circulation of evaporation, condensation and backflow is formed in the annular heat pipe; the whole parts, which do not contact with the heat source, of the outer wall of the heat pipe directly radiate heat to air; therefore the heat transmission and the heat radiation are simultaneously realized; the whole heat pipe radiator is uniform in temperature, and can be bent into various shapes according to demands of the heat source, thereby being strong in adaptability; by the adoption of the long thin heat pipe which has the pipe diameter of 2mm to 5mm, and has better heat transmission and heat radiation effects than those of a heat pipe with a larger pipe diameter, the overall heat radiation efficiency of the heat pipe radiator is improved; the size and the weight of the radiator are decreased greatly.

The invention relates to a power battery thermal management module based on liquid metal. The module comprises a box body, single batteries fixed in the box body and adjacently arranged with the largest side face, and a liquid inlet main pipe and a liquid outlet main pipe which are arranged along the opposite angles of the single batteries; and a shunting branch pipe is arranged between the liquidinlet main pipe and the liquid outlet main pipe in a communicating mode, a heat insulation partition plate is tightly arranged on one side of each single battery, and a flexible graphite film is tightly arranged on the other side of each single battery. The periphery of the flexible graphite film is wound and wrapped on the shunting branch pipe; according to the invention, the requirements on high-speed heat transfer and high temperature uniformity of each single battery in the power battery pack can be met, thermal runaway propagation and expansion accidents can be avoided or delayed, and the energy density of the power battery box body is greatly improved.

The invention relates to a composite loop heat pipe and a composite loop heat pipe heat exchange assembly. The composite loop heat pipe comprises a header box A, a header box B, evaporation channels and condensation channels. One ends of the evaporation channels and one ends of the condensation channels are connected with the header box A, and the other ends of the evaporation channels and the other ends of the condensation channels are connected with the header box B. The header box A, the header box B, the evaporation channels and the condensation channels form a loop, and a composite loop heat pipe structure is formed. The internal channels of the composite loop heat pipe are in a vacuum or negative-pressure state, and a working medium playing a role of phase-change heat transfer is sealed in the internal channels of the composite loop heat pipe. Fins or heat source channels or cold source channels are attached between the adjacent evaporation channels or the adjacent condensation channels of the composite loop heat pipe to form the heat exchange assembly. The heat exchange assembly automatically achieves the gas-gas heat exchange or gas-liquid heat exchange effect. The composite loop heat pipe and the composite loop heat pipe heat exchange assembly have the advantages of high heat exchange efficiency, large heat flux density, high heat exchange speed, high pressure bearingcapacity, light weight, stable structure, good frost resistance, safe operation and the like and belong to novel heat exchange elements.

The application belongs to the field of energy conservation, and particularly relates to a furnace slag heat exchange device and a high-temperature afterheat recycling device containing the furnace slag heat exchange device. The furnace slag heat exchange device comprises a furnace slag heat exchange mechanism which is used for conveying and distributing furnace slag; the furnace slag heat exchange mechanism comprises a first-stage heat exchange material bed which is arranged in an inclined manner and comprises a high feeding end and a low discharging end; and ventilating holes which can introduce cooling air flow to blow furnace slag to float and move to the discharging end are formed in the bottom of the first-stage heat exchange material bed. According to the furnace slag heat exchangedevice provided by the application, the cooling air flow can blow the furnace slag to float and move to a material bed of the next stage through the ventilating holes in the bottom of the material bed; conveying, heat transferring and heat exchanging of furnace slag particles are realized through collecting, distributing, performing heat exchange and recollecting repeatedly and distributing of thefurnace slag particles; meanwhile, low-pressure cooling air can be subjected to heat exchange stage by stage uniformly to achieve a purpose of recycling afterheat of the furnace slag; and the furnaceslag afterheat utilization efficiency is high.

The invention discloses a preparation method of an all-diamond micro-channel radiator with a manifold type fluid path, and belongs to the field of heat dissipation of high-power devices. The manifold type all-diamond microchannel is composed of a packaging cover plate, a shunting substrate, a microchannel substrate and a packaging bottom plate. The preparation method comprises the following steps: firstly, a high-quality crack-free diamond self-supporting thick film is prepared through a CVD preparation process of secondary nucleation and dynamic adjustment of a deposition surface; the surface is flattened through mechanical grinding and polishing; then, the size of a rectangular micro-channel in diamond plates is shaped by adopting a special laser processing technology; at the same time, a welding surface is metalized to improve the welding performance;and finally, the diamond plates are welded together in sequence through a vacuum brazing technology, a manifold type all-diamond micro-channel heat exchanger with the qualified size and groove type is obtained, and the manifold type all-diamond micro-channel heat exchanger meets the heat dissipation design requirement of a high-heat-flux heat exchanger. The micro-channel heat exchanger can be used for effective heat management of high-power advanced equipment such as high-power communication and navigation satellites, directional high-energy weapons and wide bandgap semiconductor radars.

The tower type pre-polycondensation reactor comprises a tower body, a material inlet and a material outlet are formed in the top and the bottom of the tower body respectively, a vacuum pipe with a plurality of first vacuum ports is arranged at the central axis in the tower body, and a vacuum pipe outlet is formed in the side wall of the tower body; a plurality of tower trays are arranged between the vacuum pipe and the tower body, baffle plates are arranged on the tower trays, the heights of the baffle plates are gradually increased or decreased from the position close to the tower body to the position far away from the tower body, and the height change directions of the adjacent upper and lower baffle plates are opposite; and each layer of tower tray is provided with a downcomer, and the downcomer is positioned at the lowest baffle plate in each layer. According to the invention, materials are baffled/overflowed back and forth on each layer of tower tray, and liquid film flow can be realized at the overflow port, so that the gas-liquid contact area is increased, and mass transfer evaporation of EG is facilitated; and the materials flow downwards in an annular waterfall manner on the inner sides of odd-numbered layers/the outer sides of even-numbered layers, so that the contact area between the materials and vacuum is quickly updated, the mass transfer efficiency is greatly improved, and the polymerization degree is greatly increased.

A reaction kettle includes a kettle body. A variable frequency motor is arranged above the kettle body. A main rotary shaft is connected to the variable frequency motor through a speed reducer and is arranged in the kettle body. Two connection rods are connected to the upper part of the main rotary shaft through hinges. Two ends of the two connection rods are both connected to the main rotary shaft through reset springs. A hydraulic pump is connected to the end of each connection rod. An auxiliary rotary shaft is connected to the lower parts of each hydraulic pump. A plurality of primary stirring blades are disposed on each auxiliary rotary shaft. A plurality of secondary stirring blades are disposed on the main rotary shaft. A coil pipe inlet and a coil pipe outlet are formed in the top of the kettle body. The reaction kettle has the following advantages: when the variable frequency motor works, turning radiuses of the reset springs are changed through centrifugal force, so that a larger stirring range is reached. In addition, by means of a coil pipe, cold transmission or heat transmission in the kettle body is achieved better and quicker. The reaction kettle has simple structure, is convenient to use and has good stirring effect.