Coiled heat exchanger with set of inlets and method of adjustment of heat exchanger's heating surfaces
FIELD: machine engineering.
SUBSTANCE: invention relates to the heat exchanger (1), containing a set of inlets (30-36), each one of which is connected to at least one coherent pipe (20) of the heat exchanger (1), so that at least one flow (S) of the first medium, as well as one flow (S') of the second medium can be guided through at least one coherent inlet (30, 32, 33, 35, 36) to a respective coherent at least one pipe (20), while the heat exchanger (1) has a case (10), which surrounds the space (11) of the case in which the specified pipes (20) are located, so that, in particular, the flow (S'") of the medium passing through the space (11) of the case enters into indirect heat exchange with the medium flow (S, S') passing in the corresponding pipe (20), and the specified pipes (20) are wound around the central pipe (12) of the heat exchanger (1). According to the invention it is provided that each of the pipes (20) agreed with the appropriate inlet (30-36) sets the heating surface and the heat exchanger (1) has at least one switching means (100), which is intended to switch back and forth at least one of the inlets (30) between at least one first operating condition and one second operating condition, so that the flow (S) of the first medium can be directed in the first operating condition and the flow (S') of the second medium -in the second operating condition through at least one inlet (30) to at least one agreed pipe (20), with providing the large heating surface for the flow (S) of the first medium in the first operating condition and respectively, the smaller heating surface for the flow of the second medium and with providing the large heating surface for the flow (S') of the second medium in the second operating condition, and respectively, the smaller heating surface for the flow (S) of the first medium.
EFFECT: increase the efficiency.
11 cl, 2 dwg
FIELD: power industry.
SUBSTANCE: heat exchanger reactor includes a shell (1) in the form of a flattened cone with bottoms (2) and (3), heat carrier input and output pipes (4) and (5) for the tube space, and heat carrier input and output pipes (6) and (7) for the shell space. One bottom, namely bottom (2), features a concavity (8) (if seen from below the bottom) in the centre. The shell (1) features a heat effect compensator (9). A thin-wall hollow cone (10) for flow distribution through small (11) and large (12) orifices is mounted in one bottom, namely bottom (3).
EFFECT: enhanced efficiency of heat exchanger due to even distribution of flow speed through the whole volume, and reduced dimensions.
6 cl, 3 dwg
SUBSTANCE: valve assembly includes a valve that controls heat carrier flow rate in a heat exchange unit, which has primary circuit and secondary circuit, and a valve control device having a thermostatic element that is subject to influence of temperature in secondary circuit and that can be subject to a temperature and/or pressure variation device. A physical value obtained from valve (2) or heat exchange unit (22) has effect on the above device (14. 30) of temperature and/or pressure variation. Heat exchange unit is made in the form of water heater (22) having primary supply pipeline (25) and primary discharge pipeline (26) in primary circuit (23), as well as secondary supply pipeline (27) and secondary discharge pipeline (28) in secondary circuit (24). At that, water having increased temperature can be taken through secondary discharge pipeline (28). Temperature of primary supply pipeline (25) acts on device (14, 30) of temperature and/or pressure variation.
EFFECT: providing quick control of a valve at the appropriate control characteristic.
11 cl, 7 dwg
SUBSTANCE: recuperator includes a heated gas channel; an inlet pipeline; an outlet pipeline; as well as a once-through heating surface located in the heated gas channel and formed with a variety of the first single-row tube-header assemblies and a variety of the second single-row tube-header assemblies. Each of the variety of the first single-row tube-header assemblies including a variety of the first generator heat exchange tubes is parallel connected for passage of through fluid medium flow; as well as it includes an inlet header connected to the inlet pipeline. Each of the variety of the second single-row tube-header assemblies including the variety of the second heat exchange tubes is parallel connected for passage of through fluid medium flow entering from the corresponding first heat exchange tubes; as well as it includes an outlet header connected to the outlet pipeline. Each of the inlet headers is connected to the inlet pipeline via at least one corresponding tube of the variety of the first connecting tubes, and each of the outlet headers is connected to the outlet pipeline at least via one corresponding tube of the variety of the second connecting tubes.
EFFECT: quick heating and cooling and increase in the service life.
22 cl, 7 dwg
FIELD: power engineering.
SUBSTANCE: invention relates to a valve unit (1), comprising an inlet hole, a distributor and an outlet part having at least two outlet holes. The distributor comprises an inlet part (5), communicating with the specified inlet hole, and is made as capable of distributing fluid medium received from this inle thole, between at least two parallel flows of a heat exchanger (3). The valve unit (1) also comprises the first valve unit and the second valve unit installed as capable of displacement relative to each other so that mutual position of these valve elements determines the fluid medium flow passing from the inlet hole to each outlet hole of the outlet part. Besides, the valve unit (1) comprises a collector (2) forming an integral part of the valve unit (1). This collector (2) is made as capable of forming a zone of coupling with a heat exchanger (3), having at least two channels, at the same time this collector provides for such liquid communication, at which every outlet hole (7, 9) communicates with the channel of the heat exchanger (3), connected to the collector (2). The collector comprises at least one separating element that separates at least two sections of the collector, besides, each of these sections communicates with the distributor and the specified zone of coupling with the heat exchanger.
EFFECT: using the invention will make it possible to improve distribution of a coolant between heat exchanger channels.
13 cl, 11 dwg
SUBSTANCE: invention relates to the field of heat engineering, namely, to devices for heat recovery. Device for heat recovery contains a heat exchanger (3) located in the annular space (4) representing a part of the exhaust pipe (2) branching, for example, from a gas turbine or a diesel engine. Bypass pipe (6) for exhaust passes through the annular space (4), and distribution of the exhaust flow through the heat exchanger (3) and the bypass pipe (6) is regulated by the control valve (7). The control valve (7) is a butterfly valve (7) which is located in the exhaust pipe (2), adjacent to the heat exchanger (3), at that the said butterfly valve (7) has a fixed part (8) and the rotary part (9) equipped with openings (10, 12, 11, 13) closed or combined with each other. And both the fixed part (8) and the rotary part (9) have two oppositely directed conical parts (8a, 8b; 9a, 9b).
EFFECT: creation of a simple and inexpensive in manufacture device for heat recovery, weight reduction and simplification of regulation.
9 cl, 5 dwg
SUBSTANCE: invention relates to heat exchange units and may be used in heat-exchangers with primary and secondary circuits containing valve for coolant flow control. For this purpose, the heat exchanger consisting of housing with primary circuit between inlet connection and return pipe connection, and the secondary circuit between feed line connection and drain connection, includes valve for coolant flow control through the primary circuit and actuator with the expanding element being affected by the secondary circuit temperature. The valve and expanding element are located from the opposite sides of heat transfer surface, wherethrough the heat from the primary side is transferred to the secondary side. So, the heat-exchanger is represented with plate heat-exchanger. If temperature in the secondary circuit is changed, the expanding element is extended or compressed. The expanding element is connected with the valve which controls coolant flow rate in the primary circuit.
EFFECT: development of compact heat exchanger.
9 cl, 2 dwg
FIELD: mechanical engineering; heat exchanger equipment.
SUBSTANCE: invention relates to multistage heat exchange device containing primary and secondary circuits to provide heat exchange in which heat carrier passes in opposite directions. According to invention, primary circuit has at least two points of supply of heat carrier displaced relative to each other in direction of flow. Said device contains also system of valves interacting with temperature sensors and regulating heat carrier flow through primary circuit. Valve gear for each heat carrier supply point has separate valve.
EFFECT: provision of stable control of temperature at output of secondary circuit.
5 cl, 3 dwg
SUBSTANCE: heat exchanger includes the following: at least one vertically oriented tank containing a bath of cooling fluid medium and having a space for collection of a vapour phase generated above the above said bath of cooling fluid medium, one vertical tubular element inserted inside the above tank, open on ends and coaxial to the above tank, one spiral channel that is turned about the tank axis, inserted in the above coaxial tubular element, one outlet for vapour phase generated in the upper part of the above tank; with that, at least one transportation line is inserted in the lower part of the vertical tank, open on both ends, one of which is connected to the vertical tank and the other one is free and is located outside the above said tank; with that, the above said transportation line is tubular and projects sideways outside the above said heat exchanger, includes at least one central internal channel that is interconnected as to fluid medium with the spiral channel and passes vertically along the tubular element inserted in the vertical tank; with that, the channel has an external jacket in which cooling fluid medium circulates.
EFFECT: increasing safety and serviceability of a heat exchange system.
20 cl, 1 dwg
FIELD: power engineering.
SUBSTANCE: invention relates to heat exchange devices and can be used in power engineering and related industries. The method consists in heat exchange intensification by means of implementation of periodic ring ledges on internal surface of the heat exchange element. The heat exchange element is designed as a helicoid flexible pipe with the turbulisers which are periodically located on its internal surface, preferably, as a ring ledges, meanwhile the radius of the spiral R is made within 0.05≤D/R≤0.25, where D - the pipe internal diameter, R - the spiral radius, the internal diameter d of ledges - within 0.85≤d/D≤0.98, and the step between them - within 0.45≤t/D≤0.6.
EFFECT: improvement of efficiency of heat exchange element.
FIELD: engines and pumps.
SUBSTANCE: in a liquid-liquid heat exchanger that connects sections of pipes fixed in a sealed body and connected to separate headers along circuits of cooling coolants, in the circuit of a coil-shaped coolant each section of pipes is made in the form of a spiral-shaped cone coil of meeting and opening type, installed in pairs with larger bases facing each other and in pairs by smaller bases facing each other, besides, sections are divided by transverse partitions in areas of large bases of coils by holes of circular slots, in areas of smaller bases - by central holes in the circuit of cooling coolant.
EFFECT: simplified design with increased level of stability of freon temperature heat transfer.
SUBSTANCE: invention relates to heat exchangers and can be used in power engineering and allied industries. Heat exchanger is composed by spiral flexible pipe with turbulence promoters spaced apart at its inner surface and composed of circular ledges. Spiral radius R makes 0.05≤D/R≤0.25, where D is pipe ID, R is spiral radius. Note here that ID d of said ledges makes 0.85≤d/D≤0.98, while spacing t between ledges is 0.45≤t/D≤0.6.
EFFECT: higher efficiency.
FIELD: power industry.
SUBSTANCE: heat exchanger for power plants includes screw-shaped elements of tubes with two straight and two rounded sections on each coil. Tube centres of straight sections in cross section of a heat exchanger are located on a polygon outline. Screw-shaped elements are combined at least into two groups; besides, one group of screw-shaped elements is arranged in the gap between opposite straight tube sections of the other group. Number of runs of screw-shaped elements of one group can be different from the number of runs of screw-shaped elements of the other group. Number of coils of screw-shaped elements of one group can be different from that of screw-shaped elements of the other group. Tube diameter of screw-shaped elements of one group can be different from that of screw-shaped elements of the other group.
EFFECT: considerable variety of layout decisions of heat exchangers.
3 cl, 9 dwg
FIELD: power engineering.
SUBSTANCE: in a heat exchanger comprising a jacket with supply and drain nozzles, with a tubular system fixed inside, with supply and drain nozzles, damping-elastic elements and an impact unit, the tubular system is made of two and more coil pipes with rectilinear initial and end sections, the impact unit is made with an outlet channel, with a yoke having a rocking axis: and inlet channels with dart valves on stems in the quantity of coil pipes, each of inlet channels is connected with the outlet channel via dart valves arranged on stems in them as capable of reciprocal movement between channels of inlet and the channel of outlet of the impact unit, and joined with arms of the yoke installed with the rocking axis in the outlet channel of the impact unit, rectilinear initial sections of coil pipes of the tubular system are connected to the supply nozzle of the tubular system via damping-elastic elements, and rectilinear end sections of the coil pipes are connected to the appropriate channels of the impact unit inlet.
EFFECT: higher energy efficiency of a heat exchanger by intensification of heat transfer, reduced metal intensity and increased overhaul period of operation.
FIELD: power engineering.
SUBSTANCE: heat exchanger comprises helical elements from pipes installed in gaps between coils of each other. At the same time in each coil there are two straight and two rounded sections. Identical sections are located oppositely to each other. Each helical element comprises at least three straight sections, which are equidistant near adjacent elements. Axes of all elements in a heat exchanger cross in one point, which is simultaneously installed on the heat exchanger axis. Besides, any point at the axis of the heat exchanger is also a centre of a polygon, on a contour of which there are centres of pipes in any cross section of the heat exchanger via the specified point in the zone of straight sections of helical elements. Straight sections near adjacent helical elements may have different length. Opposite rounded sections of helical elements may be arranged with various radii, which monotonously alternate in coils, besides, the same alternation is arranged near adjacent helical elements.
EFFECT: compactness of a heat exchanger, especially in an area of location of straight sections, and also possibility to install a heat exchanger in cavities with a polygonal cross section, both permanent and alternating in height.
FIELD: machine building.
SUBSTANCE: in coil heat exchanger with multitude of pipes wound around central pipe and with jacket restricting external space, its first and second parts are made out of different materials and are interconnected at point consisting of material of first part as main material and plated with material of second part. Also the first part is made out of steel, while the second part is made out of aluminium. The first and second parts are chosen from the group including the following parts: the central pipe, pipes, section of pipes, pipe grids, the jacket, distributors, bridges between two layers of the pipes, brackets for suspended fastening bridges and a case between the jacket and the pipes.
EFFECT: increased operational reliability.
6 cl, 1 dwg
SUBSTANCE: in helical-coil heat exchanger with multiple pipes wound around central pipe and jacket that limits external space around pipes, some of which make the first group of pipes with the first inner diametre and the first outer diametre, and other ones make the second group of pipes with the second inner diametre and with the second outer diametre, the second inner diametre differs from the first inner diametre and/or the second outer diametre differs from the first outer diametre, and the second thickness of pipes wall differs from the first thickness of pipes wall.
EFFECT: optimisation of helical-coil heat exchangers, from the point of view of their mass, number of helical-coil pipes, modes of operation and operational reliability.
8 cl, 1 dwg
SUBSTANCE: invention relates to gas supply cryogenic system incorporated with extra-vehicular suit to be used outside spacecraft. Heat exchanger to gasify fluid oxygen comprises cylindrical casing (1), cover (13) with inlet 11 and outlet unions for heat carrier (moist air) and manifolds (14, 15) and coolant (oxygen to be gasified) unions (9, 10). Pipeline (5) feeds moist air onto heat exchanger bottom (8) whereon distributing cylindrical barrel (6) is arranged. Coils (2), (3), (4) with tubes that make spatial spiral are arranged concentrically on each other and on casing and secured in manifolds (14), (15).
EFFECT: compact heat exchanger-converter with sufficient capacity for preset time interval.
3 cl, 2 dwg
FIELD: boiler installation technology.
SUBSTANCE: boiler installation has boiler provided with burners, hot-water heater, heat exchangers passing through boiler and hot water heater, economizer and heat exchanger with heat exchanger passing it through. All the units of boiler installation are fixed at the same platform. Case of hot-water heater has several shells; cavities among shells are intended for filling with air and feed water. Cavity intended for filling with feed water is included into feed water circuit between feed water pump and economizer. Cavity intended for filling with air is connected with burners and blower. Heat exchanger disposed inside boiler is made in form of spiral envelopes disposed coaxially. Each envelope is formed by heat-exchange tubes connected with feeding and receiving boards. Envelopes having smaller diameters are shifted to combustion chamber made in form of two sequentially disposed cavities. Heat-exchange tubes of heat exchanger are made to have two sections. Tubes of the first section are made to touch tubes from the second section. Tubes of the second section are put in spiral envelopes to form gaps between surfaces of envelopes.
EFFECT: reduced size and weight of boiler installation, steam boiler and heat exchanger.
18 cl, 13 dwg
FIELD: equipment for gas cooling and moisture condensing, particularly for atomic power plants.
SUBSTANCE: apparatus comprises shell and coiled tube arranged inside the shell. The shell includes three sections, wherein coiled tube is secured inside middle section. Middle section has oppositely located inlet and outlet pipes for medium circulating in tubes. Coiled tube is formed as straight horizontal tubes with adjacent ends connected through U-shaped branches arranged in removable end sections of the shell, wherein the branches are turned one relative another so that three-dimensional coiled tube mound around vertical axis in formed. The inlet and outlet pipes are arranged in end shell sections, wherein mounting planes thereof are parallel to longitudinal shell axis.
EFFECT: improved accessibility of check points and reduced time of heat-exchanger putting of operation.
3 cl, 3 dwg