Heat exchanger of double-pipe type
FIELD: power industry.
SUBSTANCE: heat exchanger of a double-pipe type includes two pipes located with a gap between them, one of which represents a toroid and the other one - a hollow Moebius band. Besides, longitudinal grooves can be made along Moebius band.
EFFECT: improving operating efficiency of a heat exchanger and reducing its dimensions.
2 cl, 2 dwg
The invention relates to energy and can be used in heating systems of thermal power plants.
Known heat exchanger with a complex flow pattern of fluids - shell-and-tube heat exchanger with baffles in the annular space (see Flowers FF heat and mass transfer. - M.: MPEI Publishing house, 2006. - 550 C., figure 20.4).
The closest device to the same destination to the claimed invention on the totality of symptoms is the heat exchanger tube in tube"containing two pipes located with a gap between them, and the connection of the input of the heated liquid is located on the output side of the fluid and the pipe output of a heated fluid is located on the inlet side coolant heat exchanger in the form of a helical spiral (see RF patent №2115876. The heat exchanger pipe in pipe"/ Koptelov A.L. bull. No. 10 from 10.04.2004) and adopted for the prototype.
For reasons that impede the achievement of specified following technical result when using the known heat exchanger, taken as a prototype, is that the heat transfer is not efficient enough, and the production of the heat exchanger is insufficient manufacturability.
The technical result is an increase in heat transfer efficiency, manufacturability of the heat exchanger, HC is the increase of the service life of the heat exchanger, reduction of hydraulic losses.
This technical result in the implementation of the invention is achieved in that the heat exchanger tube in tube" contains two tubes. The peculiarity lies in the fact that one of the pipes is a torus, and the second hollow Mobius strip.
Moreover, the peculiarity is that the hollow Mobius strip made longitudinally of the groove.
The drawings show:
figure 1 - schematic representation of the heat exchanger, figure 2 - image of the heat exchanger in the section.
Information confirming the ability of the invention to provide the above technical result are as follows.
The heat exchanger contains the pipe 1 to enter the coolant pipe 2 to output the carrier pipe 3 to enter the heated medium, the nozzle 4 to output the heated medium pipe 5 having the shape of a torus, tube 6, having the form of a hollow Mobius strip.
The heat exchanger works as follows.
When the vortex motion of the fluid and the heated medium towards each other, the coolant is supplied to the heat exchanger in the pipe 1, is subsequently withdrawn from the socket 2, and the heating medium is introduced into the pipe 3, is subsequently withdrawn from the pipe 4. The movement of the heated medium is a pipe 5 having the shape of a torus, consistently two of the CE is toruses, separated by a pipe 6, having the form of a hollow Mobius strip, which moves the heat to the coolant. Between the pipes 1 and 2 of the input and output of fluid and the pipes 3 and 4 of the input and output of the heated environment provides insulation layer.
The use of this invention will reduce the cost of manufacture and operation of the heat exchanger, due to the significant reduction in the number of materials. High efficiency and compact design allows it to reduce the size of the heat exchanger.
1. The heat exchanger tube in tube"containing two pipes located with a gap between them, characterized in that one of them is a torus, and the second hollow Mobius strip.
2. The heat exchanger according to claim 1, characterized in that the Mobius strip made longitudinally of the groove.
SUBSTANCE: in a heat exchanger for an atomising drier, which includes a furnace, a drier housing with an atomiser, heat exchange tubes, according to the proposed invention, the heat exchanger is made in the form of a longitudinally finned tube and a finned tube connected to it, which is located in the furnace mixing chamber; at that, when the tube leaves the furnace, it passes into the shell and tube heat exchanger, the upper part of which consists of a housing in the form of three inclined tubes (15 degrees) leaving the tube, which are changed over to horizontal tubes, on each end of which one rosette is located, and each rosette includes seven tubes of the same diameter; at that, the housing walls are heat insulated with heat insulating material, for example Penofol, and the housing has three inlet and outlet branch pipes of the heated solution and a branch pipe for the tank emptying; at that, the unit is equipped with a pressure gauge, a safety valve and a heat carrier filling valve and has an excess pressure compensation line for heat carrier filling at the operating unit, which is equipped with the valve; besides, in the unit there is a return line of the circulating circuit and an expansion tank with a branch pipe, and the drier atomiser includes a hollow housing, which consists of a cylindrical part with external thread for connection to a nozzle of a liquid supplying distributing pipeline, a conical transient part and a cylindrical part with large size of diametrical section, and with internal threaded surface, and coaxially to the housing, in its lower part there fixed is a nozzle formed with cylindrical surface with external thread interacting with cylindrical part of the housing; at that, cylindrical surface of the nozzle is changed over to a conical surface and ends with an end blind partition wall perpendicular to the housing axis, with an orifice in its centre, which is axisymmetrical to the nozzle and consists of cylindrical and conical orifice holes connected in series; at that, larger diameter of conical hole is located on the blind partition wall of the nozzle; at that, the housing and the nozzle form three internal cylindrical chambers, which are coaxial to each other, and on the nozzle, on the side opposite to liquid supply, there is an additional row of orifices, which are formed at least with three pairs of mutually perpendicular vertical channels for passage of liquid and horizontal channels, which are crossed on a conical side surface of the nozzle and form outlet holes of each of the orifices; at that, pair channels are located at a right angle to each other in longitudinal planes of the housing, and conical side surface of the nozzle is made at angle to the top, which is equal to 90°.
EFFECT: increasing efficiency and economy of the heat exchanger operation and increasing production capacity of the drier.
FIELD: power industry.
SUBSTANCE: invention is designed for being used as single-block marine high-duty nuclear power plants with high unit power, which operate in varying load mode. Liquid-metal carrier is used in the proposed reactor. Besides, different arrangement patterns of heat transfer to liquid of the second circuit are located inside the reactor housing. The proposed device includes an integral active zone, a nuclear reaction control system and a protection system, steam generators and heat exchangers, heat carrier pumping pumps, and biological protection. At that, an electromagnetic pump is installed in the heat carrier circuit when heat is being transferred in steam generator; the above pump is coaxially attached to lower part of vertically located steam generator, and in the heat carrier circuit when heat carrier is being transferred in heat exchanger the provision is made for its connection to lower part of heat exchanger by means of a pipeline and location that is parallel to vertically located heat exchanger. Heat carrier flow is arranged in upward direction through active reactor zone.
EFFECT: optimisation of heat exchange in mode of varying loads and obtaining optimum weight and dimensional parameters of nuclear power plants as a whole, being the part of the ship.
FIELD: power engineering.
SUBSTANCE: heat exchange device comprising a lower part - a heating and evaporation zone and an upper part - a cooling and condensation zone, a body with heat-insulated walls and nozzles for supply and drain of a heated solution, comprises a longitudinally ribbed pipe located in a mixing chamber of a furnace, at the same time the ribbed pipe exiting the furnace goes into a shell and tube heat exchanger, which comprises a body, three pipes exiting from the ribbed pipe at the angle of 15 degrees, changing into horizontal pipes, at each end of which there is a socket, and seven tubes of identical diametre exit from the each socket, besides, body walls are heat-insulated with a heat insulation material, for instance, penofol, and the body comprises three nozzles for supply and drain of the heated solution and a nozzle for emptying a reservoir, at the same time the device is equipped with a pressure gauge, a safety valve and a tap for coolant filling and has a line of excessive pressure compensation for coolant filling with the device on, which is equipped with a valve, besides, in the device there is a reverse line of the circulating circuit and an expander with a nozzle.
EFFECT: invention increases efficiency, reliability and effectiveness of device operation.
FIELD: power industry.
SUBSTANCE: air cooling unit of ABC GI sectional type with cylindrical displacers consists of steam supply header, several rows of inclined or vertical heat exchange tubes, condensate collection header and cylindrical displacers.
EFFECT: fundamental improvement of the design of sectional unit with air cooling due to improved efficiency of the surface use.
FIELD: power industry.
SUBSTANCE: heat exchange unit contains housing in the form of flattened cone with heads; inlet and outlet branch pipes of heat carriers to tube and inter-tube space, tube sheets in the holes of which there fixed along concentrical circles and inclined to axis of the units are tubes in the form of flattened cones, vertical central pipe for location of thermocouples; at that, tubes in the form of flattened cone have simultaneous inclination relative to the unit axis and in the direction about the unit axis.
EFFECT: improving heat exchange intensity at low metal consumption.
3 cl, 3 dwg
FIELD: power engineering.
SUBSTANCE: in a vertical shell-and-tube evaporator with an overheater, comprising a bundle of inner heat exchange tubes and external tubes installed coaxially with a circular through gap relatively to each other, installed in a cylindrical vessel, having a lower nozzle of heated coolant inlet and an upper nozzle to discharge the latter, as well as upper and lower grids to connect ends of inner tubes and a grid for fixation of external tubes, a cover and a bottom with nozzles for supply and drain of the cooled coolant, the external tubes with their grid are moved upwards from the lower grid by height sufficient to transfer the heated coolant into gaseous condition on the produced open heating surface of the external tubes.
EFFECT: reduced dimensions and weight of a shell-and-tube evaporator.
FIELD: power engineering.
SUBSTANCE: shell-and-tube heat exchanger comprises joined identical sections, every of which comprises a bundle of tubes fixed in tube plates, installed in a vessel, collector chambers of tube and shell media, at the same time each section is equipped with end rigid hollow covers, in the side walls of which perpendicularly to the longitudinal axis of the section there are through holes arranged, at the same time the sections are connected to each other along axes of the provided holes in covers via sealing elements between side walls of covers, cavities of which form a collector chamber of tube medium. Each section is additionally equipped with at least one rigid shell tightly covering the vessel and installed in a gap between end covers, in areas adjacent to tube plates, in side walls of which jointly with the vessel there are through holes arranged, the axis of which lies in the same plane with axes of holes of end covers, at the same time the sections are additionally connected to each other along axes of arranged holes in the shell and the vessel via the specified sealing elements between side walls of the shell, cavities of which form a collector chamber of shell medium.
EFFECT: unification and reduction of heat exchanger dimensions.
4 cl, 3 dwg
FIELD: power industry.
SUBSTANCE: to vertical shell-and-tube condenser containing cylindrical housing with lower and upper inlet and outlet branch pipes of heated heat carrier, bank of internal heat exchange tubes and external tubes installed coaxially so that inter-tube through annular channels are formed, as well as lower and upper grids for attachment of internal tubes and grid for attachment of upper ends of external tubes, at that, on the above cylindrical housing there is cover and bottom with branch pipes for supply of heat carrier to be cooled and discharge of cooled heat carrier, there additionally introduced is grid for attachment of lower ends of external tubes, which forms together with lower grid of internal tubes and cylindrical housing of condenser the distributing chamber of the heated heat carrier directed to inter-tube through annular channels. At that, some part of space between lower grid of internal tubes and bottom of condenser is interconnected by means of the tubes fixed in lower grids with volumetric space enclosed between external tubes, their grids and cylindrical housing that is equipped with discharge branch pipe of non-condensed gases. At that, discharge branch pipe of cooled heat carrier is equipped with floating valve.
EFFECT: stable and reliable operation.
FIELD: power industry.
SUBSTANCE: vortex heat exchange element includes heat exchange cylindrical tubes and inner tube with cylindrical surfaces, which are coaxially located one in the other; at that, tube of larger diameter is divided into sections; inside each of tubes there installed are at least two swirlers; at that, one swirler is installed at section inlet, and the other one at some distance between them, which is determined by complete attenuation of rotational movement of swirled flow at full heat load; inlet of cold heat carrier to each of tube sections of larger diameter is made in the form of contracting nozzle on inner surface of which there located are curved grooves longitudinally arranged from inlet hole to outlet hole and made in the form of dovetail. At that, near inlet hole of contracting nozzle there is annular groove which is connected both to dirt removal device, and to longitudinally located curved grooves; at that, inlets are made either on one and the same side, or on opposite sides in relation to flow movement, thus providing both counter-flow, and direct-flow movement scheme of heat carriers in element; at that, inner thread with cylindrical surfaces is made from bimetal, and material of its surface on hot heat carrier side has heat conductivity coefficient which is more by 2.0-2.5 times than material of surface on cold heat carrier side.
EFFECT: higher effective use of vortex heat transfer method.
FIELD: machine building.
SUBSTANCE: heat exchanger consists of cross flowed profiled pipe bundle in form of three diametrically tied round cylinders where central one has bigger diametre d1 and two other similar cylinders have less diametre d2 and are conjugated with central cylinder in front and back parts by triangular design. Also, the heat exchanger has collectors with tube plates. Owing to the design of tubes of different cylinder profile a flow of heat carrier successively streams arranged downstream cylinder parts (elements) of heat exchanging tubular surface of bigger diametre d1 and coupled cylinder parts of less diametre d2 between them. Also, conjugated back and front parts of less diametre d2 of each pipe of a lengthwise row are arranged symmetrically relative to axis of transverse row of pipes passing through centres of parts of bigger diametre d1. The flow moves sinuously in tube space of the bundle. The above described design of profiled pipes facilitates direct and back rational detached flow.
EFFECT: raised efficiency of pipe surface heat transfer, reduced specific quantity of metal and reduced volume of heat exchanger.
FIELD: heat power engineering, applicable in designing and production of heat exchangers with tube plates and in other branches of industry.
SUBSTANCE: according to the first modification, the shell-and-tube heat exchanger has a heat exchanger shell with connections for delivery and discharge of the medium with a lower pressure, it envelops the heat-exchanging tubes connected to the tube plate, distributor chamber separated by a partition into the inlet and outlet cavities and limited by the case with connection for delivery and discharge of the medium with a higher pressure, case cover and tube plate having a strengthening tie in the distributor chamber, the strengthening tie is made in the form of a stiffening tube fixed to the case cover of the distributor chamber and the tube plate. According to the second modification, the shell-and-tube heat exchanger has a heat exchanger shell with connections for delivery and discharge of the medium with a lower pressure, it envelops the heat-exchanging tubes connected to the tube plate, distributor chamber separated by a partition into the inlet and outlet cavities and limited by the case with connections for delivery and discharge of the medium with a higher pressure, case cover and tube plate having a strengthening tie in the distributor chamber, the strengthening tie is made in the form of a stiffening tube fixed to the case over of the distributor chamber and the tube plate, the strengthening tie in the form of a stiffening tube with the case cover and the tube plate has a through hole of a permanent or variable flow section. According to the third modification, the shell-and-tube heat exchanger has a heat exchanger shell with connections for delivery and discharge of the medium with a lower pressure, it envelops the heat-exchanging tubes connected to the tube plates, distributor chamber separated by a partition into the inlet and outlet cavities and limited by the case with connections for delivery and discharge of the medium with higher pressure and the tube plates, in the distributor chamber the tube plates are fixed to one another by a strengthening tie in the form of stiffening rod. According to the fourth modification, the shell-and-tube heat exchanger has a heat-exchanger shell with connections for delivery and discharge of the medium with a lower or pressure, it envelops the heat-exchanging tubes connected to the tube plates, distributor chamber separated by a partition into the inlet and outlet cavities and limited by the case with connections for delivery and discharge of the medium with a higher pressure and the tube plates, in the distributor chamber the tube plates are fixed to one another by a strengthening tie in the form of stiffening tube. According to the fifth modification, the shell-and-tube heat exchanger has a heat-exchanger shell with connections for delivery and discharge of the medium with a lower pressure, it envelops the heat-exchanging tubes connected to the tube plates, distributor chamber separated by a partition into the inlet and outlet cavities and limited by the case with connections for delivery and discharge of the medium with a higher pressure and the tube plates, in the distributor chamber the tube plates are fixed to one another by a strengthening tie in the form of a stiffening tube, the strengthening tie in the form of a stiffening tube with tube plates has a through hole of a permanent or variable flow section.
EFFECT: idle time, enhanced utilization factor of the heat exchanger, as well as enhanced strength of the structure in static and especially dynamic modes of operation.
FIELD: power engineering; low- and high-pressure regenerative systems of steam turbines or heat supply systems for water heating due to steam condensation.
SUBSTANCE: proposed heat exchanger has housing accommodating tube bank and main horizontal partitions, water inlet and water-outlet chambers with heated medium inlet and outlet pipes, and steam supply pipe running to steam space of housing; additional horizontal partition is installed in parallel with main one under each or after every one or every two main ones at distance shorter than that between main partitions; main and additional horizontal partitions are placed in casing whose upper part is attached to additional partitions on part of their outer perimeter and bottom part, to main partitions disposed under next additional partitions; the latter are joined through pressurized channels to upper main partitions. In addition, height of pressurized channel interconnecting main and additional partitions may be equal to or shorter than distance between them.
EFFECT: enhanced operating economic efficiency of heater by augmenting heat transfer due to reduction of condensate film thickness in heat-transfer surface tubes.
1 cl, 6 dwg
FIELD: the invention designed for heat exchange and may be used in steam generators and heat-exchange apparatus.
SUBSTANCE: the heat-exchanger has an interior and an exterior bodies, installed between them in a ring-shaped gap along their butt-ends an input and an ring plugs, an input and an output flanges correspondingly with input and output openings, an input and an output openings on the exterior body placed correspondingly near output and input flanges. In the interior body a hollow cowl is installed. It has a body and a butt-end wall with a by-passing opening off the side of the input flange. In the ring-shaped gap an exterior heat-exchange structure is located between the exterior and interior bodies. In the ring-shaped gap an interior heat-exchange structure is installed between the interior body and the cowl. The passing section of the by-passing opening can be changed either with the help of a regulating needle fixed in the cavity of the cowl along its longitudinal axle with the help of a frame with a screw opening and turned with its sharp part in the direction of the by-passing opening of the cowl, or by installation in the by-passing opening of a replacement jet with a calibrated opening.
EFFECT: the invention expands functional possibilities of a regulated heat-exchanger.
2 dwg, 5 cl
FIELD: heating engineering, particularly heat-exchanging facilities.
SUBSTANCE: heat exchanger of substantially round cross-section has tube bundle arranged in shell and secured to tube plates. The tube plates are made as flexible corrugated discs with concentric corrugations and have high strain capacity.
EFFECT: increased efficiency of heat-exchanger self-cleaning and operational reliability, as well as improved deformation characteristics of heat-exchanger members and intensified heat-exchange.
13 cl, 11 dwg
FIELD: heat engineering, in particular, in heat-exchange apparatuses of air cooling, in which outdoor air injected by the fan impeller is used as a cooling medium, and, for example, natural gas is used as the cooled gaseous medium.
SUBSTANCE: the air cooling heat-exchange apparatus has at least one vertical shell open from the bottom and from above made of woven material monolithic in cross section in the form of successively joined to one another in the direction from below upwards toroidal, cylindrical or linear surfaces, as well as a heat exchange surface and a fan impeller in each shell. The shell of the heat-exchange apparatus is made of fiberglass material impregnated by epoxy resin, the relation of various components of the shell surfaces and the diameter of the cylindrical surface is selected as follows: h=(1.47...1.49)d; g=(0.58...0.61)d; r=(0.18...0.20)d; a=(0.14...0.16)d; b=(0.55...0.57)d, where: d- the diameter of the cylindrical surface; h - the distance from the beginning of the linear surface to the mounting base; g - the distance from the beginning of the toroidal surface to the mounting base; r - the radius of the toroidal surface; a - the distance from the beginning of the cylindrical surface to the beginning of the linear surface; b - the distance from the end of the cylindrical surface to the beginning of the linear surface. Besides, the heat exchange surface positioned above the shell represents a rectangle in cross section characterized by the following relations: n=(1.1...1.12)d; m=(1.4...1.42)d, where: d - the diameter of the cylindrical surface; n - the smaller side of the rectangle; m - the larger side of the rectangle. The heat exchange surface is also made in the form of staggered horizontal rows of pipes, the distance between the centers of three adjacent pipes of the adjacent rows form an isosceles triangle with a base larger than the lateral sides.
EFFECT: enhanced efficiency of heat exchange and reduced consumption of power.
5 cl, 5 dwg
FIELD: heat exchange apparatus.
SUBSTANCE: heat exchanger comprises bank of pipes of the oval cross-section which are secured in the pipe desks and mounted inside the casing. The greater axis of the oval is mounted at an angle 3-5 degrees to the direction of the flow in the interpipe space. The pipes are inclined to the direction of the flow at the same angle or at the alternating angles. The oval cross-section of the pipe is shaped without acute corners and can be made in particular of an ellipse. The thickness of the pipes is constant or variable. For the pipe of elliptic cross-section, the thickness of the pipe wall has a minium along the small axis of the ellipse and has a maximum along the large axis of the ellipse.
EFFECT: enhanced efficiency.
7 cl, 5 dwg
FIELD: heat-exchange apparatus.
SUBSTANCE: heat-exchanging section comprises multi-row tube bank, chambers for supplying and discharging product, sides, transverse beams, and distant members interposed between the tube rows. The spacer made of a compressible air-impermeable material is interposed between one of the sides and tube bank.
EFFECT: enhanced reliability.
FIELD: heat-exchange apparatus.
SUBSTANCE: method comprises supplying gas to the pipes of the multi-row heat-exchanging section and supplying air to intertube space transverse to the tube bank by means of a fan. The air is supplied from bottom to top. The temperature of the outer wall of the tubes in the bottom row is measured at the outlet of the tubes. When the temperature of the tubes drops down to the temperature of the air entering the tube bank, the fans are cutoff and they operate in the reverse regime.
EFFECT: improved method.
FIELD: heat-exchange apparatus.
SUBSTANCE: method comprises supplying gas in the pipes of a multi-row one-way pipe bank and supplying air in the interpipe space. The directions of air supply to the first and second pipe bank halves in the direction of gas flow are opposite. The flow rate of the air entering each of the pipe bank halves is controllers synchronously, and the temperature of the gas is leveled with the gas temperature along the rows at the outlet of the pipe bank.
EFFECT: reduced power consumptions .
FIELD: heat-exchange apparatus.
SUBSTANCE: device comprises collectors for supplying and discharging gas and a row of parallel air cooling apparatus that abuts one against the other. Each of the apparatus has heat-exchange section and fan that underlies the heat-exchange section mounted in the collector of the diffuser. The shields that abut against the heat-exchange section faces are mounted throughout of the length of the device from the side of the inlet and outlet collectors.
EFFECT: reduced power consumption.