3194results about How to "Improve heat exchange efficiency" patented technology

The present invention relates to aheat-dissipating device, which comprises an upper part and a lower part. The upper part further includes an inner joining face and an outer face opposite the inner joining face and the lower part further includes a concave surface which is engaged with the inner joining face of the upper part to form an air-tight chamber with a suitable quantity of circulating liquid being filled therein. The concave surface of the lower part further includes a plurality of capillary trenches and at least one basin, wherein each capillary trench connects the basin and further grid-like trenches are formed inside the basin in order to enhance vaporizing efficiency of the circulating liquid.

End rings are coupled with upper and lower ends of a cylindrical body tube. A plurality of first heat exchanger tubes are fitted and held in holes provided in a pair of first tube plates. A plurality of second heat exchanger tubes are fitted and held in holes provided in a pair of second tube plates. The inside of each first heat exchanger tubes forms a first-fluid passage for carrying a reformed gas. The space defined between an outer wall of each first heat exchanger tube and an inner wall of the corresponding second heat exchanger tube forms a second-fluid passage for carrying a coolant. The space defined among an inner wall of the body tube and outer walls of the second heat exchanger tubes form a third-fluid passage for carrying compressed air.

A heat exchange wall include a base plate; a plurality of first protrusions distributedly provided on a surface of the base plate, and a plurality of second protrusions distributedly provided on the base plate surface. The height of the second protrusion in a normal direction of the base plate is desirably less than ½ of a height of the first protrusion in the normal direction. The height of the second protrusion in the normal direction is desirably between {fraction (1/20)} and ¼ of the height of the first protrusion in the normal direction. More desirably, the height of the second protrusion in the normal direction is {fraction (1/10)} of the height of the first protrusion in the normal direction.

The invention discloses a precession-type backfill grouting ground source thermal energy conversion precast pile device, which comprises a plurality of precession-type backfill grouting prefabricated screw piles respectively embedded into pile holes, wherein a vertical heat exchanger is embedded in each screw pile; the inlet end and the outlet end of each vertical heat exchanger respectively extend out of an opening at the upper end of the screw pile to be respectively connected with a horizontal liquid-feeding collecting pipe and a horizontal liquid outlet collecting pipe in a bearing platform or a cushion layer; centring brackets are arranged at an interval of 1-3 m along the length direction of each vertical heat exchanger; each precession-type backfill grouting prefabricated screw pile comprises a hollow pile core, wherein the bottom of the pile core is provided with a cone-shaped pile head; a screw blade is arranged on the position far away1-3m from the lower part of the outer wall of the pile core; and a post grouting reinforcing layer is poured between the middle upper part of the outer wall of the pile core and a pile hole wall. The precession-type backfill grouting ground source thermal energy conversion precast pile device comprises a plurality of precession-type backfill grouting prefabricated screw piles, and the vertical heat exchanger is embedded in each screw pile; the pile foundation construction and the ground source heat pump construction are integrated so as to avoid a drilling and pipe-laying program of a ground source heat pump system on the ground, greatly lower the front-end investment cost and save the land use area; and the post grouting reinforcing layer is poured between the middle upper part of the outer wall of the pile core and the pile hole wall so as to enlarge a heat conduction area, improve the heat conduction performance and simultaneously improve the pile body bearing capacity.

A heating apparatus 1 includes a shell 2, a primary heat exchanger (sensible heat exchanger)3, a burner (combustion means) 5, and a fan 6. A secondary heat exchanger (latent heat exchanger) 7 has a plurality of heat receiving tubes 18 arranged in parallel between a pair of headers 16 and 17, the heat receiving tubes 18 being fixed to tube plates 20. The heat receiving tubes 18 are bare tubes without fins and are arranged across flow of combustion gas. The number of the tubes 18 arranged vertically is less than the number of the tubes 18 arranged horizontally.

A heat exchange core has a plurality of flat tubes laminated in a thickness direction, each flat tube defining an exhaust gas passage in which the exhaust gas flows. A plurality of coolant flow pass holes are formed in each of the flat tubes, wherein each of the coolant flow pass holes penetrates the flat tube in the thickness direction. The coolant flow pass holes of each flat tube are connected with the coolant flow pass holes of the other flat tubes, in order to respectively form a plurality of coolant flow passages through which liquid coolant flows, and the coolant flow pass holes of each coolant flow passages are communicated with each other in the laminated direction, so that the coolant flow passages are formed to be perpendicular to the exhaust gas passages.

The invention relates to the technical field of electric cars, in particular to an integrated water-cooled power battery box. The integrated water-cooled power battery box provided by the invention comprises a box cover, a box body and a temperature regulating power system, wherein the box body is made of an aluminum alloy material and is manufactured by an extrusion moulding technology; a circulating flow passage is formed in the wall of the box body; a circulating loop for a temperature regulating medium to flow circularly is arranged inside the wall of the box body; and the temperature regulating power system can drive the temperature regulating medium to circularly flow in the circulating loop. In such a way, a water cooling board and a battery box are designed in an integrated manner,a hollow aluminum alloy section is adopted to achieve lightweight design, mechanical properties such as strength and rigidity are met, the integrated water-cooled power battery box is simpler in structure, better in technical performance and smaller in occupied space, and the comprehensive cost can be reduced; the heat-dissipating, cooling and temperature-raising and heating functions can be achieved by using one set of temperature regulating power system, the integrated water-cooled power battery box is simpler in structure, more convenient and fast to use and smaller in occupied space, themanufacturing cost and the using cost can be reduced, and the heat-dissipating efficiency and the heating efficiency can be improved.

The invention discloses a clothes drying temperature detection control method and a clothes drier. In the process of drying, a control system is used for detecting a change delta T of temperature of outgoing air in front and in rear of a condenser after drying, and determines whether the change of temperature difference of outgoing air before or after passing the condenser reaches a corresponding set value delta Tt_g or not; g is the weight of clothes to be dried; if the delta T is larger than or equal to the delta Tt_g or lasts for a set time T within a certain set value range, the clothes are dried and a heating device stops operating; after the heating device stops operating, a drying program proceeds and does not ends until the detected temperature of incoming air is lower than the set temperature; and in the process of drying, heat of humid hot air after being subjected to heat exchange with clothes and before being subjected to cooling and dehumidification is subjected to heat exchange with air which is subjected to condensation and dehumidification, and the preheated air subjected to condensation and dehumidification is heated again and led into the clothes to dry the clothes. Using the waste heat saves electric energy and time, temperature detection and determination are accurate, and drying efficiency is improved.

The invention discloses a washing and drying integrated machine for washing clothes by adopting water heated by a heat pump. The washing and drying integrated machine comprises an outer barrel, an inner barrel, a heat pump system and a water inlet pipeline; the inner barrel is arranged in the outer barrel; the outer barrel and the inner barrel are coaxially arranged; the heat pump system comprises an evaporator, a compressor, a two-position three-way electromagnetic valve, a condenser bank and a throttling valve, wherein the condenser bank is formed by connecting an air-cooled condenser and a water-cooled condenser in parallel; the evaporator, the compressor, the two-position three-way electromagnetic valve, the condenser bank, the throttling valve and the evaporator are connected in series to form a circulating system; the water inlet pipeline, the heat pump system and the outer barrel form a water heating system; the outer barrel is connected with the heat pump system through two sections of air flues to form a drying and circulating air path for drying the clothes; and the two-position three-way electromagnetic valve is used for switching and controlling a refrigerant through the air-cooled condenser or the water-cooled condenser to realize the cloth drying or water heating function of the washing and drying integrated machine. Besides the functions of drying the clothes and heating the water, cooling and dehumidifying functions, heating and dehumidifying functions and the like can be provided by arranging a switching mechanism and an external air inlet/outlet in the air path.

The invention relates to a liquid nitrogen strong cooling transformer and a refrigerating method thereof. The transformer comprises a transformer oil tank and a liquid nitrogen tank; the liquid nitrogen tank is connected with a liquid nitrogen outlet pipe; the transformer oil tank is connected with a gas nitrogen outlet pipe; an evaporating pipe is coiled in the transformer oil tank; one end of the evaporating pipe is communicated with the liquid nitrogen outlet pipe and the other end of the evaporating pipe is communicated with the gas nitrogen outlet pipe; the gas nitrogen outlet pipe is sequentially provided with a liquid nitrogen compressor, a condenser and a throttling valve; the tail end of the gas nitrogen outlet pipe extends into the liquid nitrogen tank; a temperature sensor is arranged in the transformer oil tank; and the liquid nitrogen outlet pipe is provided with a heat preservation electromagnetic valve electrically connected with the temperature sensor. The liquid nitrogen strong cooling transformer and the refrigerating method thereof have the beneficial effects that 1, heat exchange is carried out between liquid nitrogen and transformer oil, heat exchange efficiency is high and gas nitrogen is retransformed into liquid nitrogen by the liquid nitrogen compressor and the condenser and is recycled; and 2, the transformer oil in upper and lower cavities of the transformer oil tank is repeatedly circulated by a transformer oil circulating pipe and a circulating oil pump so as to enable the oil temperature to be balanced.

The invention discloses a motor cooling and vibration reducing mechanism, and belongs to the technical field of motors. The motor cooling and vibration reducing mechanism comprises a motor main body,a heat dissipation shell and a base, wherein the motor main body is fixedly connected to the interior of the heat dissipation shell through a heat dissipation water jacket, a refrigerant sucking and discharging assembly is fixedly connected to the side wall of a supporting plate, one end, away from a second driving shaft, of a reciprocating mechanism is connected to the refrigerant sucking and discharging assembly, one end, away from the motor main body, of the second driving shaft is connected to a heat dissipation assembly, a push rod is movably connected to the side wall, close to the base,of the heat dissipation shell, and an air diffusion assembly is connected to one end, away from the push rod, of a sliding block. According to the invention, the cooling liquid in the heat dissipation water jacket is sucked out and then pressed back through the refrigerant sucking and discharging assembly to increase the liquid flowing speed so as to improve the heat dissipation efficiency; and under the actions of the buffer assembly and the second spring of the push rod, the motor can be subjected to vibration reducing while the hot gas in the heat dissipation shell can be discharged to dissipate the heat of the motor so as to improve the heat dissipation efficiency and the vibration reducing efficiency.

A plate heat exchanger including first and second sets of heat exchanger plates. The second set plates are alternately stacked with the first set plates to form flow channels therebetween. The first set plates have first projections protruding in one direction from the plane of the plates and second projections protruding in the opposite direction from the plane of the plate. The second set plates have third projections protruding in the one direction from the plane of the second set plates. The first projections are connected to adjacent second set plates and the second projections protrude into the space between at least two of the third projections. The second projections may be spaced from and not connected to the second set plates, with the height of the third projections from the second set plates being greater than the height of the first and second projections from opposite sides of the first set plates.

The invention discloses a high-strength silicon carbide ceramic pipe and manufacturing method thereof, and belongs to the technical field of engineering ceramic materials. Silicon carbide ceramic powders with different granularities are used as the main raw materials, graphite powder and carbon black are used as binders, and resin is used as a binder. The materials are uniformly mixed by a spray granulation process; an organic plasticizer of cellulose and a lubrication agent are added into the mixture; and vacuum pugging, decaying and extrusion molding are conducted to obtain a pipe base substrate; and the base substrate is subjected to drying solidification, high temperature sintering reaction, sandblast and heat treatment to obtain the high strength silicon carbide ceramic pipe. The pipe biscuit manufactured by the process has high strength and length of more than 4000mm; after sintering, the pipe has strength of 300MPa or more, and has the advantages of moderate density, high thermal conductivity, high fracture toughness, good thermal shock resistance and low cost, and can be widely applied to chemical and metallurgy fields, such as acid and alkaline corrosion and high temperature erosion.

Provided are a cooling device coated with carbon nanotubes and method of manufacturing the same. Carbon nanotubes are dispersively coated on a surface of the cooling device that radiates generated by a predetermined apparatus or component through thermal exchange. Thus, a carbon nanotube structure is formed so that the cooling device can improve in a thermal radiation characteristic and become small-sized. As a result, electronic devices can be downscaled and heat generated by a highly integrated electronic circuit chip can be effectively radiated, thus increasing lifetime and performance of an operating circuit.

A heat exchanger assembled from multiple heat exchanging tubes. Each of the multiple heat exchanging tubes is formed as a flattened tube of 0.5 mm in thickness by press work or bending work of a stainless steel plate member having a thickness of 0.1 mm. Each of the multiple heat exchanging tubes is structured to have multiple lines of sequential wave crests and multiple lines of sequential wave troughs formed on each of flattened faces of the heat exchanging tube. The multiple lines of the sequential wave crests and the multiple lines of the sequential wave troughs are arranged to have a preset angle γ relative to a main stream of an air flow. The lines of the sequential wave crests and the lines of the sequential wave troughs are symmetrically folded back about folding lines arranged at a preset interval W along the main stream of the air flow.

In a heat exchange element 1, first fluid circulation portions 5 having a honeycomb structure having a plurality of cells separated by ceramic partition walls 4, extending through in an axial direction from one end face 2 to the other end face 2, and allowing a heated medium as a first fluid to flow therethrough and second fluid circulation portions 6 being separated by ceramic partition walls 4, extending in the direction perpendicular to the axial direction, allowing a second fluid to flow therethrough, transferring heat to a medium to be heated as the second fluid are alternately formed as a unit. The cells 3 on the first fluid circulation portion 5 side are smaller than the cells 3 on the second fluid circulation portion 6 side, and the partition walls have a density of 0.5 to 5 g/cm³ and a thermal conductivity of 10 to 300 W/mK.

The invention relates to a process for heating and cooling materials in a reaction kettle through a jacket by using a heat carrier. The process completes five working procedures by six loops. The loops are as flollows: a heat conduction oil heating loop: heat oil flows out from an oil outlet of a boiler and comes in and out of the jacket of the reaction kettle through a pipeline and a valve for circularly heating; a heating and cooling shift loop: the heat oil is sent back to the boiler by an oil pump through a pipeline; a cold conduction heat oil cooling loop and an ice salt water cooling loop: cold oil enters the jacket of the reaction kettle from an outlet of a cool oil tank by the pump through a pipeline and a cooler and returns to the cool oil tank through a pipeline provided with a balance valve; ice salt water returns to a cooling device from a refrigerating device through a cooler shell side and a pipeline, and cold conduction heat oil is circularly cooled in the cooler; a cool heating shift loop: cold oil comes out of the jacket of the reaction kettle, passes through the pipeline and returns to the cold oil tank from an inlet by the pump through the cooler; a cold oil pre-cooling loop: cold oil comes out of the outlet of the oil tank and returns to the cold oil tank by the pump through the pipeline and the shell side of the cooler introducing ice salt water. The invention has the advantages that the loop structure is compact, the process is stable, the heat exchange efficiency is high, and the high temperature and the low temperature are 300 DEG C and 15 DEG C below zero respectively.

The invention provides a silicon carbide ceramic heat-exchanging board. The heat-exchanging board is of a centrosymmetry structure in design shape, and the centrosymmetry structure can be quadrate or round; the heat-exchanging board is provided with a heat-exchanging channel of a dual loop structure; and the silicon carbide content of silicon carbide ceramic is not lower than 95wt% in terms of the total weight of the silicon carbide ceramic. The invention further provides a preparation method and application of the heat-exchanging board. The silicon carbide ceramic heat-exchanging board disclosed by the invention can be used for greatly increasing the heat-exchanging efficiency and prolonging the service of a heat exchanger.

The invention relates to a flat heat exchanger comprising a plurality of trough-shaped heat exchanger plates stacked on top of each other, the heat exchanger plates having edges abutting against each other. The plates may have flow conduits for the cooling fluid and for another fluid between the heat exchanger plates. The flow ducts are assembled with inserts in the form of turbulator plates. The heat exchanger has at least four inlet and outlet openings in the corners of the heat exchanger plates forming two vertical ducts for the cooling fluid and two for the other fluid in the stack. a vertical conduit. An insert in a flow conduit for a cooling fluid consists of one or more components. The flow duct for the cooling fluid is equipped with a plate-like insert with a width guiding the duct in the region near the opening. The insert is formed as a turbulence generator in the central area between the plate-like parts. The openings are arranged in the corners in such a way that only a narrow strip is left occupied by the guiding duct whose width is significantly smaller than that of the other guiding ducts.

The invention relates to a regenerator for a micro gas turbine, concretely is a original surface heat exchanger for increasing the heat efficiency of the gas turbine, it can increase the compactness and the service life of regenerator. The gas inlet and outlet channels are arranged on the right lower horn and the left upper horn, the high pressure air flows into the regenerator through the air inlet channel, flows out from the air outlet channel, the left and right frames of the heat exchanging board are welded and formed a air in/out aperture, the fuel gas can flow into the regenerator through the aperture, flows out form aperture on another side, the centre is heat exchanging corrugation plates, the flatten area at two sides of the plates is used to place flow guiding plate, the heat exchanging board has a side frame for welding and sealing. The flow speed at two sides has a little difference, the heat exchanging effect is the best, and it can upgrade the heat exchanging efficiency.