Heat exchange pipe, boiler and steam turbine device

FIELD: heating system.

SUBSTANCE: inner part of the furnace chamber pipe has the supercritical pipe pressure and contains the grooves (36) on the inner peripheral surface with spiral shape to the pipe axis direction; and ribs (37), protruding inwards radially through the grooves (36), while in cross-section along the pipe axis direction, when the width (mm) of grooves (36) in the direction of the pipe axis is specified as Wg, height (mm) of ribs (37) in the radial direction is specified as Hr and the external pipe diameter (mm) is specified as D, the width Wg (mm) of grooves (36), Hr height (mm) of ribs (37) and the external pipe diameter D (mm) meet the ratio "Wg/(Hr*D)>0.40".

EFFECT: increased heat transfer at supercritical pressure.

18 cl, 15 dwg

 



 

Same patents:

FIELD: heating.

SUBSTANCE: according to a connection method of a tube to plates of a heat exchanger, plates having collars are located on the tube, a working medium is supplied under pressure to the tube, and tube pressure and diameter is increased. Between an angular zone of the collar of each plate and the tube there set is a gap that is larger than a gap between the tube and the end zone of the collar. The collar of each plate is bent with the tube wall towards the peripheral part of the plate; the end zone of the collar is enlarged, upset on the tube till tight contact of the angular zone of the collar to the tube. Tube pressure is continued to be increased till fixation of the specified density of the angular zone of the collar of each plate to the tube, and after that, tube pressure is released. The invention presents three versions of design of a heat exchanger plate by means of the specified method.

EFFECT: reducing energy intensity of production of a heat exchanger and improving its efficiency.

4 cl, 7 dwg

FIELD: heating.

SUBSTANCE: invention relates to heat engineering and can be used at manufacture of heat exchangers. A heat exchanger consisting of finned tubes includes a lot of parallel located heat exchange tubes 10 and a lot of leaf-shaped fins 1 provided orthogonally to heat exchange tubes 10, with that, each of the heat exchange tubes is in contact with flanges of fins of leaf-shaped fins and inserted along flanges of fins. Each flange 2 of the fin is made so that a provision is made for a bend on each of reversely projecting section 3 and root section 4 of fin flange 2, and flat intermediate section 5 is made between bends. Thickness Tw1 of reversely projecting section 3 is smaller than thickness Tw2 of root section 4. Radius R1 of the bend of reversely projecting section 3 is larger than radius R2 of the bend of root section 4, and (Tw1/R1) ratio of radius R1 to thickness Tw1 of the bend of reversely projecting section 3 is equal to half or more of (Tw2/R2) ratio of radius R2 to thickness Tw2 of the bend of root section 4.

EFFECT: reduction of resistance of thermal contact between heat exchange tubes and flanges of fins.

6 cl, 11 dwg, 4 tbl

FIELD: power industry.

SUBSTANCE: water distribution device for chimney-type cooling tower includes two identical flat sprinkling sections positioned side by side, each section is connected to a separate water pipeline by water feed risers, each riser is connected by its output to a middle part of its own horizontal water distribution pipeline, the latter are installed parallel to each other and connected to parallel water dispensing pipeline system where water sprinkling nozzles are mounted at regular spaces along water dispensing pipelines; flow diameter of water distribution pipelines is reduced stepwise onwards from the point of connection to water feed riser; water sprinkling sections are positioned symmetrical against vertical axis of the cooling tower, each section features one water feed riser, section risers are positioned in parallel to each other along the diameter of circle inscribed in cooling tower cross-section; parallel water drain pipelines are connected to water distribution pipelines to join them to water dispensing pipelines, water drain pipeline cross-section is reduced stepwise from water dispensing pipeline towards cooling tower wall, water drain pipelines are perpendicular to water distribution pipelines; ends of water drain pipelines in each section are interconnected by peripheral pipelines running along a circle inscribed in the cooling tower cross-section, while water sprinkling nozzles of adjoining water dispensing pipelines are arranged in checker order.

EFFECT: enhanced efficiency of water distribution between sprinkling sections and along cross-section of chimney-type cooling tower, improved efficiency of water cooling.

2 dwg

FIELD: heating.

SUBSTANCE: invention is intended to be used on transport means and relates to cooling devices of operating equipment of diesel locomotives. A radiator of a honeycomb type for oil and water cooling consists of cooling tubes of a round cross-section with hexagonal bases located horizontally in the movement direction of a locomotive to provide air passage via the tube, with that, swirler inserts are soldered into cooling tubes of the round cross-section; besides, thickness of a plate of a swirler insert decreases from the tube edge to its centre. Shape of side walls of the radiator housing is changed in the form of a wave so that one radiator as to wave can enter another one with a possibility of adding additional tubes to overall dimensions of the radiator.

EFFECT: invention provides increase of a radiator surface area swept with air and improvement of dimension parameters of the radiator at honeycomb location of inserts.

2 cl, 7 dwg

Heat exchange tube // 2543586

FIELD: heating.

SUBSTANCE: heat exchange tube in which the grooves with the depth of 0.3H to 0.5H, where H is the wall thickness of the tube, applied with the pitch on the outer surface of the tube and the protrusions corresponding to them on the inner surface of the tube are made along the helical line with the pitch which is ranging from D to 8D, where D is the outer diameter of the tube. In the helical grooves the finning is located, made of wire with the introduction into the internal space of the tube with a pitch from 2D to 16D at right angle to the tube axis.

EFFECT: increase in heat exchange.

1 dwg

FIELD: heating.

SUBSTANCE: in the heat exchanging device the finned heat exchanging tube with the diameter d is made serpentine-shaped with an outer finning diameter D and the thickness of the fins L1, located at a distance L2 from each other. The amplitude of the serpentine A on the outer finning diameter is not less than A=D×(2+1L1+L2L11), the wave period of the serpentine P is not less than P=2D×(1+1L1+L2L11).

EFFECT: intensification of heat exchanging due to turbulence in the flow passing inside the finned serpentine-shaped tubes, and increase in the area of heat exchanging of the device.

23 cl, 8 dwg, 2 tbl

FIELD: heating.

SUBSTANCE: invention relates to a refrigeration circuit. The essence of the invention is the refrigeration circuit (3) for household appliances, in particular household appliances for cooling, such as refrigerators and freezers, comprises a first heat exchanger (5) made with the ability of fluid communication with the compressor (4), which provides cooling of cooling fluid medium which flows through it, and its transition to substantially liquid phase. It also comprises a second heat exchanger (7) fluidly communicating with the said first heat exchanger (5) and acting in the space (2) to be cooled. The second heat exchanger (7) provides a partial transition of the cooling fluid medium in gaseous phase with heat absorption thereby the said space (2) is cooled. The cooling fluid medium is circulated from the first heat exchanger (5) to the second heat exchanger (7) and, thus, enters into the compressor (4) for the next cycle. The capillary device (6) is located between the first heat exchanger (5) and the second (7) heat exchanger for expanding the said cooling fluid medium. One of the said first heat exchanger (5) and the second heat exchanger (7) comprises a flexible tube (9), and the part of the said tube (9) has such a corrugated profile, which gives it flexibility, and the said tube (9) in section comprises a layer (100) of plastic and a layer (101) comprising the metallic material. The metal layer (101) is connected to the plastic layer, and the said metallic material is configured with the ability to form a barrier against moisture. The said layer (100) of plastic is a layer the structural purpose of which is maintaining the shape of the tube (9), and is preferably made of a thermoplastic material. The metal layer (101) is flexible, it does not have a function of a supporting structure and comprises a single-layered metal film or a multilayer film comprising one or more metal films connected or not connected to the layer of material made with the ability to maintaining the shape.

EFFECT: improving the efficiency of heat exchanging and providing waterproofing.

16 cl, 27 dwg, 1 tbl

FIELD: heating.

SUBSTANCE: invention refers to heat power engineering and can be used at manufacture of boiler tubes. A production method of boiler tubes with different inner ribbed surfaces consists in the fact that a spindle calculated as per dimensions and provided with a pass having the specified shape of outer surface is made with coiling into the pass of a wire-like element forming on it a reverse image of the specified ribbed structure of a tube. A brazing metal paste is applied onto outer surface of the wire-like element and the spindle is introduced into the tube. In order to provide adaptation of the wire-like element to inner surface of the tube, the spindle is removed from above wire-like element and the tube is heated up to fusion temperature of the brazing metal paste to connect the wire-like element to inner surface of the tube, and then, the tube is cooled.

EFFECT: simpler formation, introduction and fixation of ribs inside the tube.

10 cl, 5 dwg

FIELD: heating.

SUBSTANCE: for the purpose of water heating by solar radiation, a heat exchange panel with absorbing coating is put in a heat insulated casing with the glass through which the sun light reaches the surface of the panel, heats it and an attached pipe with a heat carrier, the heated heat carrier is delivered by the said pipe to the accumulation tank of a user. The heat exchange panel and method of its assembly comprises elements made from aluminium profiles with a heat carrier pipe being inserted in them, the flat surface of the aluminium profile of the heat exchange panel is fitted by V-shaped longitudinal grooves 0.5 mm wide and deep with the pitch between the centres of 10 mm and is coated by heat-proof paint diluted by a solvent, and the aluminium profile elements are made on the opposite sides with the edges forming a closed loop around the heat carrier pipe when one element is jointed with another, being a part of heat conducting section of the panel and ferruling it due to some structurally specified tension. Circulation of the heat carrier in the loop provides for the accumulation of hot water due to cooling of the heat exchange panel. For the purpose of maximal efficiency of the process it is necessary that the heat exchange panel is of minimal heat capacity but at the same time transfers heat to the heat carrier as fast as possible. The above is implemented in the proposed invention by manufacturing of the heat exchange panel from the material with good thermal conductivity - aluminium - and by the optimisation of the panel's heat conducting section for better heat contact with the heat carrier pipe.

EFFECT: profile has no additional surfaces not engaged in heat exchange process, maximal heat transfer to the heat carrier pipe is ensured due to the fact that it is closely embraced by one profile side and closed by another side with provision for necessary pressing.

4 dwg

Heat exchanger pipe // 2511859

FIELD: power industry.

SUBSTANCE: in a heat exchanger pipe, smooth pipe sections and ledges form a channel, where ledges feature additional heat exchanger intensifier in the form of discreet slots perpendicular to flow, and the channel matches geometry relations: l2=(90-100)h; l1=(90-100)h; l'/l1=0.05; h/D=0.03, where l2 is slot length, mm; l1 is ledge length, mm; l' is length of ledge section between shallow slots, mm; h is ledge height, mm; D is inner diameter of heat exchanger pipe, mm.

EFFECT: enhanced power efficiency due to reduced flow friction.

4 dwg, 1 tbl

Heat exchanger // 2504717

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: heating systems.

SUBSTANCE: invention is intended for attaching heating surfaces and can be used in heat engineering. Boiler includes the top part having the wall made of vertical tubes and vertical connecting straps formed therebetween, and the bottom part supported on the wall, which has the wall made of inclined tubes and inclined connecting straps formed therebetween. Inclined tubes have upper end sections which end on the wall upper edge and are deflected relative to each other. Along the wall upper edge there provided is the connecting strap which is equipped with many vertical elbow pipes with connection branches protruding from the connecting strap and vertical branches fixed on the connecting strap and welded to vertical tubes, and many inclined elbow pipes with connection branches protruding from the connecting strap and inclined branches fixed on the connecting strap and welded to the end sections of inclined tubes. The connecting strap is welded to the wall under the inclined branches of inclined elbow pipes along inclined branches and above end sections of inclined tubes along end sections. Vertical branches of vertical elbow pipes of the connecting strap are welded to vertical wall tubes.

EFFECT: reducing constructional costs for suspension of the boiler bottom part.

5 cl, 4 dwg

FIELD: heating systems.

SUBSTANCE: invention is intended for attaching heating surfaces and can be used in heat engineering. Boiler includes the top part having the wall made of vertical tubes and vertical connecting straps formed therebetween, and the bottom part supported on the wall, which has the wall made of inclined tubes and inclined connecting straps formed therebetween. Inclined tubes have upper end sections which end on the wall upper edge and are deflected relative to each other. Along the wall upper edge there provided is the connecting strap which is equipped with many vertical elbow pipes with connection branches protruding from the connecting strap and vertical branches fixed on the connecting strap and welded to vertical tubes, and many inclined elbow pipes with connection branches protruding from the connecting strap and inclined branches fixed on the connecting strap and welded to the end sections of inclined tubes. The connecting strap is welded to the wall under the inclined branches of inclined elbow pipes along inclined branches and above end sections of inclined tubes along end sections. Vertical branches of vertical elbow pipes of the connecting strap are welded to vertical wall tubes.

EFFECT: reducing constructional costs for suspension of the boiler bottom part.

5 cl, 4 dwg

Heat exchanger // 2504717

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: heating system.

SUBSTANCE: inner part of the furnace chamber pipe has the supercritical pipe pressure and contains the grooves (36) on the inner peripheral surface with spiral shape to the pipe axis direction; and ribs (37), protruding inwards radially through the grooves (36), while in cross-section along the pipe axis direction, when the width (mm) of grooves (36) in the direction of the pipe axis is specified as Wg, height (mm) of ribs (37) in the radial direction is specified as Hr and the external pipe diameter (mm) is specified as D, the width Wg (mm) of grooves (36), Hr height (mm) of ribs (37) and the external pipe diameter D (mm) meet the ratio "Wg/(Hr*D)>0.40".

EFFECT: increased heat transfer at supercritical pressure.

18 cl, 15 dwg

Heat exchanger // 2245501

FIELD: heat exchanging facilities for use in different industries.

SUBSTANCE: invention is designed for use in heat exchanging devices, particularly those with two non-communicating flows of heat carriers with heat exchange through wall. Proposed heat exchanger consists of housing accommodating thin-walled hollow elements with clearances in between, hollow ribs opening into said clearances and passing through inner space of thin-walled hollow elements being made in form of hermetically sealed flat spaces arranged in tandem and interconnected by circular channels, and ribs are made so that in any two adjacent thin-walled hollow elements single rib in one of elements is arranged along axis of heat exchanger, and other element has several ribs arranged over periphery of thin-walled hollow elements.

EFFECT: intensification of heat exchange, reduced overall dimensions and mass of device.

2 cl, 2 dwg

FIELD: heat engineering; production of methods and the equipment for production of finned pipes of cooling apparatuses or containers.

SUBSTANCE: the invention is intended for application in heat engineering, in particular, at production of finned pipes of cooling apparatuses or containers used for storage of spent fuel of nuclear reactors, and also other materials or objects being the powerful heat sources. The method of production of a heat-exchanging pipe provides for introduction of a core and ribs inside a tubular billet. At that on the internal surface of the tubular billet and on the external surface of the core there are preliminary made hollow longitudinal grooves. The ribs produced separately from the core are made in the form of a strip consisting of two layers, joint among themselves on edges in longitudinal direction or in the form of hollow pipes of oval cross-section, which before installation in the grooves are deformed creating inside excessive pressure, then insert them in the grooves and relieve the pressure. At that the pressure is chosen so, that the relative change of the maximal overall dimension of each rib in transversal direction is equal to: δ≥δmin,

where δ is the value of the relative change of maximum overall dimensions of a rib in the transversal direction, δmin - minimum value of a relative change of the maximum overall dimensions of the rib in the transversal direction, at which assembly of a pipe and creation of elastic deformations in the ribs are ensured. The invention ensures efficient heat sink cooling in large-sized pipes with their internal ribbing and simultaneous simplification of production.

EFFECT: the invention ensures efficient heat sink cooling in large-sized pipes with their internal ribbing and simultaneous simplification of production.

1 dwg

FIELD: heat-exchange equipment.

SUBSTANCE: heat-exchange apparatus has supplying and removing collectors integrated by group of heat-exchange tubes having protrusions at their surfaces. Protrusions are made in form of sheets connected by their side surfaces with surface of tube along the length being equal to 1,5-3,0 thickness of sheets. Protrusions are disposed tangentially to surface of tube tat the points of connection of those sheets with tubes. Several sheets are fastened to tube along the perimeter of cross-section to overlap each other. Protrusions on surfaces of heat-exchange tubes are made in form of several sheets of different lengths being fastened along their side surfaces by welding or soldering along the whole length of surfaces of heat-exchange tubes. Protrusions in form of sheets fastened to surfaces of heat-exchange tubes can be also made to have slots and curves relatively sheets at adjacent, neighboring parts.

EFFECT: improved efficiency of heat exchange; provision of adjustment of heat flow.

7 cl, 12 dwg

FIELD: heat power engineering.

SUBSTANCE: method comprises setting the core and ribs into the piping blank. The core is hollow, and each of the ribs are made of a hollow body defined by the rotation of a figure composed of the straight sections interconnected to form a hexagon. After setting the ribs, they are subjected to the flexible deformation by bringing the sides of the rib together. The sides of the ribs are perpendicular to the axis of the pipe and point in the direction of the pipe axis.

EFFECT: enhanced efficiency.

2 dwg

FIELD: the invention is designed for application in the field of heat-and-power engineering namely in finned heat-exchanging tubes of a gas air cooling apparatus.

SUBSTANCE: the apparatus has the body of a heat exchanging tube and an exterior finning which form in the transverse cooling flow of the exterior heat exchanging environment plots of shading of various intensity in a conditioned flatness normal to the vector of the mentioned flow of the exterior heat exchanging environment and passing through the central longitudinal axle of the tube: complete aerodynamics shading corresponding to the square of projection on the referred flatness of the unit of the length of the actual body of the tube without taking the finning into consideration and incomplete aerodynamics shading corresponding to the total square of projections on the referred flatness of the plots of finning of the unit of the length of the finned tubes limited from each side with a conditional direct line tracing along the tops of the fins minus the square of complete shading produced by the body of the tube without taking the finning into consideration. At that the connection of the squares of projections on the referred flatness of the plots of shading of various intention to their sum forms correspondently (0,30-0,80): 1 and (0,21-0,79):1 and the medium value along the radius of finning of the specific square of aerodynamics shading on the plots of projection of finning on the referred flatness on the unit of the length of the tube composes 0,08-0,55.

EFFECT: allows to increase thermal aerodynamics characteristics of finned heat exchanging tubes and thermal effectiveness of the apparatus in the whole and also to decrease metal consuming and the dimension of the construction of the beam of heat exchanging tubes of the gas air cooling apparatus.

15 cl, 4 dwg

Heat-exchanger // 2266497

FIELD: heat-exchanging equipment, particularly for combustion engine radiators and for other heat-exchanging facilities using gaseous coolant.

SUBSTANCE: heat-exchanger comprises coolant pipes and cooling plates provided with corrugations and cuts. The pipes are formed of brass and copper corrugations extend in longitudinal direction. The corrugations are used as turbulence promoters and define channels for gaseous coolant circulation. The plates are formed of copper strip.

EFFECT: increased heat dissipation.

4 dwg

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