Heat-exchanging device

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 + 1 L 1 + L 2 L 1 1 ) , the wave period of the serpentine P is not less than P = 2 D × ( 1 + 1 L 1 + L 2 L 1 1 ) .

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

 

The invention relates to the field of heat, namely the heat-exchange apparatus with finned tubes, and can be used in air cooling units, heat exchangers, coolers, exchangers, furnaces, which are used in various industries.

Known heat exchangers, comprising a housing, inlet and outlet manifolds and the beam direct heat exchange tubes (A.G. Kasatkin Basic processes and apparatuses of chemical technology. Publisher Alliance, Moscow, 2008, str-333). The main disadvantages of these structures is not sufficiently intensive heat exchange with the low coefficient of heat transfer due to weak turbulence flow inside the tube and in the annular space, high consumption and substantial dimensions.

Known heat exchangers, comprising a housing, inlet and outlet manifolds and the bundle of heat exchange tubes in the form of a space-spiral coils that are installed in the gaps between the coils of each other (patent RF №2152574, F28D 7/02 from 16.09.1999 and No. 2238500, F28D 7/02 from 27.12.2002). The main disadvantages of these structures is the difficulty of manufacture of the coils, the formation of the tube bundles in the annular space of a heat exchanger, the heat transfer between environments is not enough intensive, especially in Microb the second space, low coefficient of heat transfer at the level of 150 kcal/h*m2("Heat exchange equipment co., LTD "ANODE-TC"").

Known heat exchangers, comprising a housing, inlet and outlet manifolds and coil elements of pipes installed in the gaps between the turns of the coil elements (patent RF №2451875, F22B 37/00, F28D 7/02 from 14.10.2010). The main disadvantage of this design is not sufficiently intensive heat exchange between environments, especially when the movement of the transfer medium outside coil elements across the axis of the tube bundle and the manufacture of coiled tubes bundles attachment of one of the beam pipe in the other beams.

The closest in technical essence and the achieved result of the claimed invention is a heat exchanger with finned heat exchange tubes, in particular air cooler, comprising a housing, inlet and outlet manifolds with input devices and output of hot and cold streams and the beam direct heat exchange finned tubes (Fundamentals of calculation and design of heat exchanger for air cooling.: The Handbook. A.N. Bessonov, GA, dreicer, V.B. have been Kuntysh and other STDs, "Nedra", 1996, str-104). The main disadvantages of the above structure is not sufficiently intensive heat transfer due to weak turbulence in the flow inside a straight pipe, and low is efficient heat transfer from the wall to the flow inside the pipe, limiting the overall coefficient of heat transfer.

Task to be solved by the claimed invention is directed, is the intensification of heat transfer in tubular and intertubular spaces of bundles of finned heat exchanger tubes with a simultaneous increase in the specific heat transfer area.

This problem is solved due to the fact that in the heat exchange apparatus of finned heat exchanger tubes, comprising a casing, inlet and outlet manifolds with input devices and output of hot and cold streams, at least one finned heat exchanger tube or a bundle of finned heat exchanger tubes according to the invention finned heat pipe of diameter d is made serpentineapathy with fins on the outer surface serpentineapathy tube with an outer diameter of the fins D and the thickness of the ribs L1located on the heat exchanger serpentineapathy finned tube at a distance of L2from each other, and the amplitude of A serpentine heat exchanger finned tubes on the outer diameter of the fins is at least

A=D(2+1L1+L2L1-1)

and the wave period of the serpentine P is not less than

P=2D(1+1L1+L2L1-1).

Heat exchanger with finned heat exchange tubes can be accomplished with fins serpentineapathy heat pipes, which are the rings of thickness L1with an outer diameter D and inner diameter equal to the outside diameter of the heat exchange tubes d, located on serpentineapathy finned heat exchange tube at a distance of L2from each other, which unifies the tooling of the fins and reduces production costs serpentineapathy finned heat exchanger tubes.

Heat exchanger with finned heat exchange tubes can be accomplished with fins serpentineapathy heat pipes, which are the petals of a thickness of L1with an outer diameter D and inner diameter equal to the outside diameter of the heat exchange tubes d, the distance between adjacent petals, equal to the length of the base of the petal, with length L2between the rows of petals that intensifies the turbulization of the flow in the annular space at the expense of that is about, the edges of the petals cut the flow in the annular space, generating it the vortices, leading to the alignment of the temperature field.

Heat exchanger with finned heat exchange tubes can be accomplished with fins serpentineapathy heat pipes, which are the thorns of a thickness of L1and a height equal to D-d, with the distance between adjacent studs L1and length L2between rows of spines, which simplifies the manufacturing technology of the fins and reduces its consumption.

Heat exchanger with finned heat exchange tubes can be accomplished with fins serpentineapathy heat exchanging tubes constituting the spiral tape thickness L1with the surface described by the spiral of Archimedes, with belt width equal to D-d, with the distance between the turns of the spiral belt L2from each other, which provides the twisting of the flow in the annular space and increases the speed of the flow, leading to an additional increase of the heat transfer coefficient at the outer surface serpentineapathy the tubes.

Heat exchanger with finned heat exchange tubes can be accomplished with fins serpentineapathy the tubes, which is an elliptical plate of thickness L1the location is by a relatively serpentineapathy the tubes with eccentricity so, axis serpentineapathy the tubes coincides with one of the centers of elliptical plates with a maximum distance from the outer wall serpentineapathy heat pipe d to the top of the elliptical plate D, and located on serpentineapathy finned heat exchange tube at a distance of L2from each other, thus increasing the surface of the fins and thus the heat transfer between the tubular and intertubular spaces of the heat exchanger.

Heat exchanger with finned heat exchange tubes can be accomplished with fins serpentineapathy the tubes, which is an elliptical plate installed on serpentineapathy heat pipe in such a way that in the area of the crest of the serpentine maximum distance from the outer wall serpentineapathy the tubes to the top of the elliptical plate D is turned towards the crest of the serpentine, and in the area of the cavity of serpentine maximum distance from the outer wall serpentineapathy the tubes to the top of the elliptical plate D is turned in the direction of depression of the serpentine, while ensuring maximum use of the internal space of the heat exchanger due to the fact that an increasing number of bends serpentineapathy the tubes leading to increase in surface heat transfer per unit length of the heat exchanger, additional turbulence in the flow in the pipe space and, consequently, to increase the coefficient of heat transfer.

Heat exchanger with finned heat exchange tubes can be accomplished with fins serpentineapathy heat exchange tubes having a cross-sectional shape of a rectangle, which simplifies the formation of the fins due to the constancy of the pressure roller snap-on layer of deformable metal deposited on the outer surface serpentineapathy the tubes.

Heat exchanger with finned heat exchange tubes can be accomplished with fins serpentineapathy heat exchange tubes having a cross-section of a trapezoid shape with a broad base at the outer surface of the wall of the tubes, which allows to increase the height of the fins with a simultaneous increase its mechanical strength.

Heat exchanger with finned heat exchange tubes can be accomplished with fins serpentineapathy heat exchange tubes having a cross-sectional shape of alternating rectangles of variable cross-section with a broad base at the outer surface of the wall of the tubes and progressively decreasing as the distance from the walls of the tubes.

Heat exchanger with finned heat exchange tubes which can be performed with fins serpentineapathy heat exchange tubes, posted on the wall of the tubes parallel to each other when applying the beading on the original direct rebreanu heat pipe.

Heat exchanger with finned heat exchange tubes can be accomplished with fins serpentineapathy the tubes, placed on the wall of the tubes perpendicular to the axis of the tubes when applied beading on the original serpentinous rebreanu heat pipe.

Heat exchanger with finned heat exchange tubes can be accomplished with fins serpentineapathy the tubes made by welding element fins to the outer surface serpentineapathy the tubes in the case when the material of the fins and tubes of uniform.

Heat exchanger with finned heat exchange tubes can be accomplished with fins serpentineapathy heat exchanger tube made by extrusion of a layer of deformable metal deposited on the outer surface serpentineapathy heat pipe when the pipe is made of bimetal outer layer easily deformable metal.

As a deformable metal deposited on the outer surface serpentineapathy the tubes, you can use aluminum or alloys n is its basis, which reduces the intensity of the heat exchanger.

As a deformable metal deposited on the outer surface serpentineapathy the tubes, you can use copper or alloys on its basis, which increases the conductivity of the fins and its resistance to aggressive environments.

Heat exchanger with finned heat exchange tubes may be accomplished by bending the previously manufactured finned direct heat exchange tubes, which significantly simplifies the manufacturing technology of heat exchanger.

Heat exchanger with finned heat exchange tubes may be accomplished by a beading previously curved straight heat exchanger pipes that allows you to create original custom design of heat exchangers.

Heat exchanger with finned heat exchange tubes can be made with ribbed serpentineapathy heat exchanger tube having the form of a coil with the presence of extensive areas and transition zones with the change of direction of flow in the pipe, which allows the use of such heat exchangers as part of the design of the chamber convection furnace or immersion condenser-cooler box type.

Heat exchanger with finned heat exchange tubes, made in the form of a coil which, may not have fins in transition zones with the change of direction of flow in the pipe, which facilitates its use as a structural member of the chamber of the convection tube furnace.

Heat exchanger with finned heat exchange tubes, made in the shape of the coil and having fins in transition zones with the change of direction of flow in the pipe, can be performed with removal of the transition zones beyond the housing, for example in the convection chamber, the tube furnace.

When the flow in the tube side of heat exchanger with finned heat exchange tubes parallel to the beam finned serpentinous heat pipe body of the heat exchanger can also be serpentineapathy fit the shape of the beam finned serpentinous heat exchanging tubes, which eliminates the presence of zones with no heat transfer between teploobmenniki flows and increases the flow velocity in the annular space of a heat exchanger, leading to an increase in the heat transfer coefficient in the annular space of a heat exchanger.

When the flow in the tube side of heat exchanger with finned heat exchange tubes perpendicular to the beam finned serpentinous heat exchange tubes of the bundle of Orebro the data serpentinous heat exchange tubes can be accommodated in the housing in a horizontal plane forming serpentine, while the casing of the heat exchanger can also be serpentineapathy fit the shape of the beam finned serpentinous heat exchange tubes.

Run bundle heat exchanger finned tubes serpentineapathy using pipe bends in vertical or horizontal planes allows turboservice the flow inside the pipe. Serpentinata the form of a tube bundle heat exchanger finned tubes leads to the fact that the speed of the local streams flow inside the tubes become variables, and in the bending area of the pipe on the inside with respect to the bending segment of the local velocity decreases, and in the outer area increase, which leads to turbulence in the flow due to the heterogeneity of the high-speed mode local streams, then when the flow in the zone of the next bend in the structure of the local streams is reversed.

Turbulization of the flow is a highly effective method of heat exchange intensification, as it allows with a slight increase in the hydraulic resistance to increase the heat transfer coefficient. When excessive distance between the pipe bends (large amplitude waves serpentine) additionally emerged on the bending pipe turbulence is damped and the rest of the pipe section to the next bend will be a little different in the structure of the flow from the direct t of the UBA. Therefore, the wave amplitude of the serpentine bundle heat exchanger finned tubes on the tops drive A should be minimal as far as the design of finned serpentineapathy pipe, while it may not be less than

A=D×(2+1L1+L2L1-1)

and the period of the P wave, respectively, must be at least

P=2D×(1+1L1+L2L1-1).

When running bundle heat exchanger finned tubes serpentineapathy in addition to the turbulence in the flow passing within a pipe, compared to straight finned tubes used in the prototype, due to bending increases the length of finned tubes that are placed in the same casing, and, accordingly, increases the heat exchange area.

When running bundle heat exchanger finned tubes serpentineapathy in the horizontal plane, it is advisable to body heat exchanger Ana is ogino to perform serpentineapathy in the vertical plane. In this case, the closed cavities in the body and intensifies the heat transfer.

Achievable technical result consists in the intensification of heat transfer due to turbulence in the flow within the heat exchanger finned tubes made serpentinejarrahdale in vertical or horizontal planes, at the same time increasing the heat exchange area in comparison with the prototype used straight finned tubes.

The invention is illustrated by figures 1-8:

the figure 1 shows a bundle heat exchanger finned tubes made serpentineapathy in a vertical plane;

the figure 2 shows the bundle heat exchanger finned tubes made serpentineapathy in the horizontal plane;

the figure 3 shows the structural fragment of the heat exchanger, finned tubes with a diameter of 25 mm diameter beading 55 mm, thickness of edges 1 mm and a spacing of 3.5 mm, made serpentineapathy in a vertical plane;

the figure 4 presents a photograph of the experimental-industrial heat transfer section of the bundle heat exchanger with finned tubes made serpentineapathy in the horizontal plane;

the figure 5 presents a photograph of a fragment of experimental-industrial heat transfer section of the bundle heat exchanger with finned tubes made serpentineapathy in Gori is ostalnoe plane;

the figure 6 shows a fragment of the convection chamber, the tube furnace with a coil made of a heat exchange finned serpentinous tubes without fins in transition zones;

the figure 7 depicts the fridge bundle heat exchanger with finned tubes made serpentineapathy in the horizontal plane (top view and in a perspective view);

the figure 8 depicts the fridge bundle heat exchanger with finned tubes made serpentineapathy in the horizontal plane (top view and in a perspective view).

In figures 1-2, 6-8: 1 - bundle heat exchanger finned serpentinous pipes, 2 - heat exchanger finned serpentinata pipe, 3 - chamber, 4 - input socket, 5 - output socket.

In figure 3: 1 - heat serpentinata pipe, 2 - edges.

According to the figures 1 and 8 bundle heat exchanger finned serpentinous pipe 1 consists of a heat exchanger finned tube 2 made serpentinous in the vertical plane, on opposite sides serpentinous pipes installed camera with 3 inlet 4 and outlet fitting 5.

According to figures 2 and 7 bundle heat exchanger finned serpentinous pipe 1 consists of a heat exchanger finned tube 2 made serpentinous in the horizontal plane on opposite sides of serpentinous the EIT pipes installed camera with 3 inlet 4 and outlet fitting 5.

According to figure 3 heat serpentineapathy tube 1 fin 2 by virtue of design features have different distance between the tops of the ribs.

Heat exchangers, which include a bundle heat exchanger serpentinous finned tubes, are as follows.

The bundle heat exchanger serpentinous finned tube 1 is installed in the heat exchange section of a typical air cooler that has a fan and diffuser manifold for air supply. Building heat transfer section, as shown in figures 4 and 7, made serpentineapathy in the horizontal plane, repeating serpentinejarrahdale finned tubes 2. This design prevents the leakage of air flow through the space formed by the installation of finned tubes made serpentinejarrahdale in the horizontal plane. The air flow is directed by the fan on the cone on the outer surface of the heat exchange serpentinous finned tubes 2, passing through the beam of heat transfer of finned tubes 1, removes heat cooling medium flowing inside the tubes 2, so that the air is heated and removed from the apparatus. A cooled environment can be liquids, gases and condensed vapors that are fed through the hose 4, mounted in the chamber of the exchanger the military section 3, in the beam 1, consisting of a finned heat exchanger serpentinous pipe 2. Moving through the internal channels of the pipe 2, the medium is cooled and discharged through the outlet nozzle 5. The implementation of finned tubes unlike the prototype is not straight but serpentineapathy leads to increased heat exchange surface by lengthening the pipe and further intensification of heat exchange caused by the turbulization of the flow of cooling medium. For cooling the gas, you can use the bundle heat exchanger finned tubes made serpentinejarrahdale as in the vertical (figures 2, 8)and in the horizontal plane (figure 1, 7). For cooling liquids, you must use the bundle heat exchanger finned tubes made serpentinejarrahdale in the horizontal plane, to ensure emptying of the pipes when you stop and repair of air cooler. For cooling and condensing the vapors you must use the bundle heat exchanger finned tubes made serpentinejarrahdale in the horizontal plane, to avoid formation of liquid plugs in pipe bends and ensure emptying of the pipes when you stop and repair of air cooler.

When using bundle heat exchanger serpentinous finned tube 1 to heat process streams, for example in tubular is ecah, the beam is installed in the casing, which has an input and output channels for supplying gaseous fluid. Cooled flue gases are formed during combustion of fuel in power plants (furnaces, boilers, gas turbines etc), which on the input channel are received into the housing of the apparatus and washing the external surface of the heat exchanger serpentinous finned tubes 2 from all sides, give the warmth of the heated medium flowing inside the tubes 2, resulting cooled and removed from the apparatus through outlet channel of the device. Heated fluids and gases, which are fed through the hose 4, mounted in the chamber heat transfer section 3, the beam 1, consisting of a finned heat exchanger serpentinous pipe 2. Moving through the internal channels of the pipe 2, the heated environment takes heat from the coolant is heated and discharged through the outlet nozzle 5. The implementation of finned tubes unlike the prototype is not straight but serpentineapathy leads to increased heat exchange surface by lengthening the pipe and further intensification of heat exchange caused by the turbulization of the flow of the heated medium. For gas heating, you can use the bundle heat exchanger finned tubes made serpentinejarrahdale as vertically the social, and in the horizontal plane. For heating liquids, you must use the bundle heat exchanger finned tubes made serpentinejarrahdale in the horizontal plane, to ensure emptying of the pipes when you stop and repair of the apparatus. In this way heat serpentinous finned tubes 1 set instead of straight sections of tube coil in the convection chamber furnaces, as shown in figure 6.

The bundle heat exchanger serpentinous finned tubes 1 can also be installed inside the housing of a submersible fridge, which has the socket for input and output cooling medium such as cooling water. The cooling medium through the inlet fitting is supplied into the housing of a submersible fridge, washing the external surface of the heat exchanger serpentinous finned tubes 2 from all sides, removes excess heat from the cooling medium flowing inside the pipe 2, and is output from the apparatus through the nozzle output. A cooled environment can be liquids, gases and condensed vapors that are fed through the hose 4, mounted in the chamber heat transfer section 3, the beam 1, consisting of a finned heat exchanger serpentinous pipe 2. Moving through the internal channels of the pipe 2, the medium is cooled and discharged through the outlet nozzle 5. Orebro the Noah pipe unlike the prototype is not straight and serpentineapathy leads to increased heat exchange surface by lengthening the pipe and further intensification of heat exchange caused by the turbulization of the flow of cooling medium. For cooling the gas, you can use the bundle heat exchanger finned tubes made serpentinejarrahdale both in vertical and in the horizontal plane. For cooling liquids, you must use the bundle heat exchanger finned tubes made serpentinejarrahdale in the horizontal plane, to ensure emptying of the pipes when you stop and repair of air cooler. For cooling and condensing the vapors you must use the bundle heat exchanger finned tubes made serpentinejarrahdale in the horizontal plane, to avoid formation of liquid plugs in pipe bends and ensure emptying of the pipes when you stop and repair of air cooler.

The figure 3 shows the dimensions of the heat exchangers, finned tubes, made serpentineapathy, according to the present invention. Finned heat exchange tubes with a diameter of d=25 mm made serpentineapathy with fins on the outer surface serpentineapathy tube with an outer diameter of the fins D=55 mm and thickness of edges L1=1 mm, located on the heat exchanger serpentinous the second finned tube at a distance of L 2=3.5 mm from each other, and the amplitude of the serpentine heat exchanger finned tubes on the outer diameter of the fins is A=155 mm, according to the invention, this value must be at leastA=55×(2+11+3,51-1)=125,7mm

and the wave period of the serpentine P=200 mm, according to the invention, this value must be at leastP=2D×(1+1L1+L2L1-1)=2×55×(1+11=3,51-1)=141,4mm

Comparison of the heat exchanger air cooler made according to the invention (figure 4), with the known heat exchanger, using the heat exchange section with a straight pipe with welded fins, p is Tordillo higher effectiveness of the proposed heat exchanger and showed the water is cooled by 1-4°C below the temperature of the exhaust air at 5-6°C higher, pipe length and surface area of heat transfer 1.23 times greater than that of the prototype. The results of the tests are presented in tables 1 and 2.

Thus, performing heat exchange finned tubes serpentinejarrahdale leads to the intensification of heat transfer due to turbulence in the flow within the heat exchanger finned tubes, and increase the area of heat exchange apparatus.

1. Heat exchanger with finned heat exchange tubes, comprising a casing, inlet and outlet manifolds with input devices and output of hot and cold streams, at least one finned heat exchanger tube or a bundle of finned heat exchange tubes, wherein said finned heat pipe of diameter d is made serpentineapathy with fins on the outer surface serpentineapathy tube with an outer diameter of the fins D and the thickness of the ribs L1located on the heat exchanger serpentineapathy finned tube at a distance of L2from each other, and the amplitude of the serpentine And heat exchangers, finned tubes on the outer diameter of the fins is at least
A=D×(2+1L1+L2mrow> L1-1),
the wave period of the serpentine R not less than
P=2D×(1+1L1+L2L1-1).

2. Heat exchanger with finned heat exchanger tubes according to claim 1, characterized in that the fins serpentineapathy heat pipe is a ring of thickness L1 of outer diameter D and inner diameter equal to the outside diameter of the heat exchange tubes d, located on serpentineapathy finned heat exchange tube at a distance of L2each other.

3. Heat exchanger with finned heat exchanger tubes according to claim 1, characterized in that the fins serpentineapathy the tubes represents the petals of a thickness of L1with an outer diameter D and inner diameter equal to the outside diameter of the heat exchange tubes d, the distance between adjacent petals, equal to the length of the base of the petal, the distance L2between the rows of petals.

4. Heat exchanger with finned heat exchanger tubes according to claim 1, characterized in that the fins is acontinuously the tubes represents spikes thickness L 1and height equal to D-d, with the distance between adjacent studs L1and length L2between rows of spines.

5. Heat exchanger with finned heat exchanger tubes according to claim 1, characterized in that the fins serpentineapathy heat exchanger tube is a spiral ribbon of a thickness of L1with the surface described by the spiral of Archimedes, with belt width equal to D-d, with the distance between the turns of the spiral belt L2each other.

6. Heat exchanger with finned heat exchanger tubes according to claim 1, characterized in that the fins serpentineapathy heat pipe is an elliptic plate of thickness L1located relatively serpentineapathy the tubes with eccentricity so that the axis serpentineapathy the tubes coincides with one of the centers of elliptical plates with a maximum distance from the outer wall serpentineapathy heat pipe d to the top of the elliptical plate D, and located on serpentineapathy finned heat exchange tube at a distance of L2each other.

7. Heat exchanger with finned heat exchanger tubes according to claim 6, characterized in that the fins serpentineapathy heat pipe is an elliptic plate installed on Serpenti obraznoi heat exchanger tube so in the area of the ridge serpentine maximum distance from the outer wall serpentineapathy the tubes to the top of the elliptical plate D is turned towards the crest of the serpentine, and in the area of the cavity of serpentine maximum distance from the outer wall serpentineapathy the tubes to the top of the elliptical plate D which faces the cavity of serpentine.

8. Heat exchanger with finned heat exchanger tubes according to claim 1, characterized in that the fins serpentineapathy the tubes in cross section has the shape of a rectangle.

9. Heat exchanger with finned heat exchanger tubes according to claim 1, characterized in that the fins serpentineapathy the tubes in the cross-section has a trapezoid shape with a broad base at the outer surface of the wall of the tubes.

10. Heat exchanger with finned heat exchanger tubes according to claim 1, characterized in that the fins serpentineapathy the tubes in cross section has the form of alternating rectangles of variable cross-section with a broad base at the outer surface of the wall of the tubes and progressively decreasing as the distance from the walls of the tubes.

11. Heat exchanger with finned heat exchanger tubes according to claim 1, characterized in that the fins serpentineapathy the tubes placed on the wall of the tubes parallel to each other.

12. Heat exchanger with finned heat exchanger tubes according to claim 1, characterized in that the fins serpentineapathy the tubes placed on the wall of the tubes perpendicular to the axis of the tubes.

13. Heat exchanger with finned heat exchanger tubes according to claim 1, characterized in that the fins serpentineapathy heat exchanger tube is made by welding element fins to the outer surface serpentineapathy the tubes.

14. Heat exchanger with finned heat exchanger tubes according to claim 1, characterized in that the fins serpentineapathy heat exchanger tube is made by extrusion of a layer of deformable metal deposited on the outer surface serpentineapathy the tubes.

15. Heat exchanger with finned heat exchange tubes 14, characterized in that the deformable metal deposited on the outer surface serpentineapathy the tubes, used aluminium or alloys based on it.

16. Heat exchanger with finned heat exchange tubes 14, characterized in that the deformable metal deposited on the outer surface serpentineapathy the tubes, use copper or alloys based on it.

17. Heat exchanger with the PRS is proven heat exchanger tubes according to claim 1, wherein the finned serpentinata heat exchange pipe is made by bending a previously manufactured finned straight heat exchanger pipes.

18. Heat exchanger with finned heat exchanger tubes according to claim 1, characterized in that the fin serpentinata heat exchange pipe is made by a beading previously curved straight heat exchanger pipes.

19. Heat exchanger with finned heat exchanger tubes according to claim 1, characterized in that the fin serpentinata heat pipe has the shape of a coil with the presence of extensive areas and transition zones with the change of direction of flow in the pipe.

20. Heat exchanger with finned heat exchanger tubes according to claim 19, wherein the finned serpentinata heat pipe in the form of a coil does not have fins in transition zones with the change of direction of flow in the pipe.

21. Heat exchanger with finned heat exchanger tubes according to claim 20, wherein the finned serpentinata heat pipe in the form of a coil that does not have fins in transition zones with the change of direction of flow in the pipe, shall be made the transition zones beyond the hull.

22. Heat exchanger with finned heat exchanger tubes according to claim 1 characterized in that when proch the approval of the flow in the annular space parallel to the beam finned serpentinous heat pipe body of the heat exchanger is also serpentineapathy, repeating the beam shape finned serpentinous heat exchange tubes.

23. Heat exchanger with finned heat exchanger tubes according to claim 1, characterized in that when the flow in the annular space perpendicular to the beam finned serpentinous heat exchange tubes of the bundle of finned serpentinous heat exchanging tubes is placed in the housing in a horizontal plane forming the serpentine, and the housing of the heat exchanger is also serpentineapathy fit the shape of the beam finned serpentinous heat exchange tubes.



 

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SUBSTANCE: in a heat exchange tube, the channel of which has projections and grooves, according to the proposed invention, the channel is formed with plain tube sections and narrow grooves with geometrical ratios: h/D=0.1, (t-l)/h=1, l/h<(3-5) where h - projection height, mm, D - inner diameter of the heat exchange tube, mm, t - length of a typical section of the channel with a projection and a groove, mm, l - groove length, mm.

EFFECT: use of the proposed heat exchange tube will allow reducing consumption of energy for pumping of heat carriers through a heat exchange unit by 2,5-4 times in comparison to a plain-tube heat exchange unit owing to reducing hydraulic resistance.

4 dwg, 1 tbl

FIELD: heating.

SUBSTANCE: double-pipe heat exchanger, in the internal pipe and in inter-pipe space of which screw inserts are installed. Inner space of the internal pipe and inter-pipe space between internal and external pipes represent screw cavities formed with walls of pipes and screw inserts. Screw inserts are installed so that an internal screw insert is connected mainly by welding or soldering to inner surface of the internal pipe. Screw insert in inter-pipe space is connected in the same manner to outer surface of the internal pipe and to inner surface of the external pipe. Materials of the internal pipe, screw inserts and points of joints of screw inserts with walls of the internal pipe shall have minimum thermal resistance. Flows of liquid or gaseous media in the internal pipe and in inter-pipe space flow along helical spirals.

EFFECT: invention allows shortening the length of double-pipe heat exchangers up to ten times and more and reducing the weight and overall dimensions of a heat exchanger.

2 dwg

FIELD: heating.

SUBSTANCE: double-pipe heat exchanger for liquid and gaseous media, which contains a heat exchange pipe and an external turbulence promoter dividing inter-tube space into inlet and outlet cavities, which are concentrically located in the cylindrical housing. On the turbulence promoter surface there are the holes serving as medium injection to the cavity between the heat exchange pipe and external turbulence promoter. Inside the heat exchange pipe there concentrically located is an internal turbulence promoter dividing inter-tube space into inlet and outlet cavities and having the holes on the surface, which serve as medium injection into the cavity between the heat exchange pipe and the internal turbulence promoter. Use of the invention will allow intensifying heat exchange due to almost complete removal of a boundary layer from outer and inner surfaces of the heat-conducting pipe with heated (or cooled) medium.

EFFECT: increasing heat transfer coefficient between heat carrier and heated medium up to 10 times and more; reduction of the required heat exchange surface corresponding to it, length of stream heat exchangers, their weight and overall dimensions.

2 dwg

Heat exchanger // 2500965

FIELD: power engineering.

SUBSTANCE: heat exchanger comprises a vessel with the first and second channels for coolants and spherical heat transfer elements placed in spherical holes. Channels are separated with a heat transfer surface, inlet and outlet nozzles of the first channel, inlet and outlet nozzles of the second channel. Spherical heat transfer elements are placed in spherical holes on the heat transfer surface and on the inner surface of the vessel.

EFFECT: invention makes it possible to improve heat transfer from a heat transfer surface that separates channels of a heat exchanger.

2 dwg

Heat exchange pipe // 2496072

FIELD: power engineering.

SUBSTANCE: heat exchange pipe, in which a channel is made with protrusions and grooves, besides, the channel is made with geometric ratios: h/D=0.03, l1=(90-100)/h, l2=(90-100)h, where h - protrusion height, mm D - inner diameter of a heat exchange pipe, mm l1 - protrusion length, mm l2 - groove length, mm.

EFFECT: invention makes it possible to increase energy efficiency due to reduction of hydraulic resistance.

4 dwg

FIELD: power industry.

SUBSTANCE: tubular heat exchanger includes tubes with ribs. Tubes pass in some axial direction and are equipped with heat exchange ribs. Each rib includes a heat exchanger surface that envelopes a tube and passes in some radial direction relative to the tube and has relief shape, thus forming grooves located at some distance from each other in radial direction. Grooves of a rib have dimensions, such as width and depth, which are reduced as far as they are located at some distance from the tube in radial direction, thus providing direction of fluid medium around the tube.

EFFECT: creation of a shaped rib structure for a heat exchanger tube, which allows increasing heat exchange between air and fluid medium circulating in the tube without deterioration of head loss.

9 cl, 10 dwg

FIELD: power engineering.

SUBSTANCE: heat exchanger-reactor comprises a vessel in the form of a truncated cone, with a surface concave towards its vertical axis with bottoms, nozzle for coolant inlet and outlet from tube and shell spaces. Inside the vessel 1 there is a tube bundle arranged, comprising at least two rows of cone-shaped pipes fixed with ends in holes of plates along concentric circumferences. Tubes are installed with an inclination simultaneously in two directions: with an inclination to a vertical axis of the vessel and with an additional inclination arranged by displacement of ends in a circumferential direction, i.e. along arcs of circumferences of their installation in tube plates. At the same time inclination angles are arranged within the limits of 0.5-50.0 degrees from the vertical plane stretching via the vertical axis of the vessel.

EFFECT: no necessity to increase input parameters of a coolant, which helps to save thermal and electric power.

5 cl, 4 dwg

FIELD: power engineering.

SUBSTANCE: plant comprises a jacket that passes in longitudinal direction between the head end and the base end, inside which there are inbuilt elements that form a heat-exchange and a mixing structure. Besides, there is coolant medium supply as an internal flow into pipes of inbuilt elements from the base end to the head end and fluid supply as an external flow from the head end to the base end. The plant comprises reinforcement elements to stabilise inbuilt elements in longitudinal direction from pressure gradients developed by fluid, besides, in the main area they are joined with reinforcement elements into a partial structure, which is not exposed to thermal expansion, and in the side area they remain at least partially non-reinforced to form a partial structure capable of thermal expansion in longitudinal direction.

EFFECT: increased efficiency of heat exchange, improvement of the plant.

14 cl, 4 dwg

FIELD: oil and gas industry.

SUBSTANCE: heating device of high-viscous oil products and their mixtures includes cylindrical housing with inlet and outlet covers with the appropriate inlet and outlet connection pipelines, tube grids located inside the housing, and distributing inlet and outlet boxes equipped with inlet and outlet tubes respectively and interconnected with ends of tube grids for pumping of heat carrier. Housing is located vertically, lower outlet cover is tapered with outlet connection pipe in lower part, which is enveloped below that cover with inlet distribution box which has the possibility of exchanging the heat with taper surface of lower cover, and upper inlet cover is equipped with inlet connection pipe installed coaxially with the housing; at that, tube grid is made in the form of hopper bent inside the housing and converging downwards; inside that hopper there located is baffle plate distributing the flow of oil products to tube grids and uniformly connected along the perimetre at least to three tubes of the grid with heat-conducting plates.

EFFECT: device is reliable-to-operate, and uniform resistance to flow of oil products is provided.

2 dwg

Heat exchanger // 2384802

FIELD: heating.

SUBSTANCE: invention refers to heat engineering and can be used as heat exchanger of nuclear power plant operating in variable load conditions. In heat exchanger containing a bundle of heat exchange zigzag-shaped tubes with external finning in straight sections, which is installed in the housing, spacers arranged between tubes of the bundle so that mixing chambers are formed in the bending area of the latter, the spacers have thickenings in straight tube sections and grooves evenly spaced relative to them so that an individual channel is formed around each tube, which interconnects mixing chambers to each other.

EFFECT: providing forced heat exchange for obtaining small overall dimensions of equipment owing to increasing uniform temperature field in cross section of tube bundle, and decreasing relative tube deformation at thermal elongations.

4 dwg

Heat exchanger // 2378595

FIELD: heating systems.

SUBSTANCE: invention refers to heat engineering and can be used during arrangement of high thermally stressed heat exchanger of nuclear power plant. In heat exchanger consisting of bank of heat exchange coil tubes the ends of which are fixed in tube sheets arranged in the form of a platen, straight sections of several coil tubes are located consequently in one plane, and bent sections are opened to the side from location plane of straight sections; at that, opening of bends of opposite ends, straight sections, is made to different sides.

EFFECT: providing maximum compactness of tube bank of heat exchanger and reaching high degree of heat exchange efficiency owing to arrangement of heat removal surface itself during operation, increasing life time of reliable operation of heat exchanger design at high specific thermal stresses of the volume occupied with it.

5 dwg

Heat exchanger // 2341751

FIELD: power engineering.

SUBSTANCE: invention can be used in feed water heaters of thermal and nuclear power plants. Proposed heat exchanger consists of a shell inside which a central header and vertical tube platens connected with their ends to appropriate central header chambers are installed. At that each platen is made at least of one "П"-shaped section with transverse parts installed in the shell one above the other, and intermediate part wherein external tubes are installed longitudinally on the shell side, and internal tubes are located on the header side. Internal tubes of the intermediate section part are made with additional sections bent in the direction of central header and located between transverse parts of this section. In this case average tube length makes bigger in each platen, which leads to less number of tubes used in each platen, and therefore to velocity increase in tube and intertube spaces of platens and heat exchange intensification, which finally reduces heat exchanger specific amount of metal.

EFFECT: reducing thermal and hydraulic maldistributions in platens, which also improves platen heat exchange and reduces to a greater degree the heat exchanger specific amount of metal.

2 dwg

FIELD: mechanics, heating.

SUBSTANCE: in compliance with the invention, the heat exchanger-modular water heater incorporates one or two modules each comprising, at least, two heat exchanger units integrated by a diffuser to feed a cooling medium and a confuser to withdraw the medium to be cooled, primarily, a turbine hot exhaust gas. It also comprises the manifolds feeding and withdrawing the medium being heated, primarily, air, each communicating, via a tube plates fitted directly in the said manifold walls, with the multi-row bank of the four-pass heat exchanger variable standard-size pipes, the said standards sizes being calculated from the ratios covered by this invention and the aforesaid tube plates being secured by appropriated spacers. The multi-row bank can be made up of, at least, two trains of two-pass U-shape pipes integrated by the aforesaid manifolds and, at least, one bypass chamber.

EFFECT: high-efficiency heat exchanger, lower heat exchanger metal input, optimum design and spacers, higher design rigidity, simpler assembly of heat exchange pipe banks.

21 cl, 16 dwg

FIELD: mechanics, heating.

SUBSTANCE: in compliance with the invention, the heat exchanger-modular water heater incorporates one or two modules each comprising, at least, two heat exchanger units integrated by a diffuser to feed a cooling medium and a confuser to withdraw the medium to be cooled, primarily, a turbine hot exhaust gas. It also comprises the manifolds feeding and withdrawing the medium being heated, primarily, air, each communicating, via a tube plate, with, at least, one multi-row bank of multipass heat exchange pipes, the various pipes being furnished with bends varying in number from four to six and forming four rectilinear runs combining their three bends. Note here that the spacing in, at least, one direction, within the band cross section, of a part of the pipes or within their limits, or of, at least, one bank of the pipes out coming from the medium feed manifold, or, at least, in one of the next runs in the same direction does not comply with that of the pipes or a part of them in their bank run right nearby the manifold withdrawing the medium being heated and/or in one of the previous bank runs. The unit of the heat exchange-modular air heater comprises four runs of the heat exchanger pipe multi-row four-pass bank, the said pipes being laid in horizontal rows spaced in horizontal and vertical planes, the manifolds feeding and withdrawing the medium being heated, each being connected, via separate tube plates, with heat exchanger pipes, each tube plate being mounted in the aforesaid manifold walls. Note here that the spacing in, at least, one direction, within the band cross section, of a part of the pipes or within their limits, or of, at least, one bank of the pipes out coming from the medium feed manifold, or, at least, in one of the next runs in the same direction does not comply with that of the pipes or a part of them in their bank run right nearby the manifold withdrawing the medium being heated and/or in one of the previous bank runs. In compliance with the proposed invention, the aforesaid heat exchanger unit-modular air heater comprises a carcass, a bottom, and upper and lower casing walls, a diffuser to feed the medium to be cooled and a confuser to feed the aforesaid medium, manifolds feeding and withdrawing the medium to be heated and furnished with tube plates that form, in every row, an even number of rectilinear multi-pipe banks including, at least, two inner and two outer banks integrated by constant-radius bends. Note here that the unit housing bottom, cover and one of the side walls represent panels with a reinforcement framing elements forming a flat rod systems, while the unit carcass is formed by a set of the aforesaid flat rod systems with intermediate posts inter jointing the aforesaid systems and the manifolds housings rigidly fixed thereto and, in their turn, attached to the unit bottom and inter jointed via two-ring diaphragms and a pipe medium displacer. Note that the parts of the aforesaid manifolds housings with the aforesaid tube plates and pipe medium displacer fitted therein form, when combined, the unit housing rigid face wall while the side walls allow fastening the diffuser and confuser elements. Note here also that the spacing in, at least, one direction, within the band cross section, of a part of the pipes or within their limits, or of, at least, one bank of the pipes out coming from the medium feed manifold, or, at least, in one of the next runs in the same direction does not comply with that of the pipes or a part of them in their bank run right nearby the manifold withdrawing the medium being heated and/or in one of the previous bank runs. In compliance with this invention, the aforesaid heat exchanger unit-modular air heater incorporates a multi-row heat exchanger pipe bank made up of, at least, two bundles of two-pass U-pipes forming, within one bundle, two-run horizontal rows of pipes spaced apart both in rows and between rows, manifolds of feeding and withdrawing the medium being heated and, at least one bypass chamber arranged there between. Note here that the aforesaid manifolds and the bypass chamber communicate with the heat exchanger pipes via a common tube plate or separate tube plates, at least, one part of the said plates forming a part of the aforesaid manifolds enclosure walls. Note also here that the spacing in, at least, one direction, within the band cross section, of a part of the pipes or within their limits, or of, at least, one bank of the pipes out coming from the medium feed manifold, or, at least, in one of the next runs in the same direction does not comply with that of the pipes or a part of them in their bank run right nearby the manifold withdrawing the medium being heated and/or in one of the previous bank runs.

EFFECT: higher heat exchange efficiency, lower metal intensity of regenerative air heater.

34 cl, 15 dwg

The heat exchanger // 2141613
The invention relates to heat engineering, primarily for vehicles, namely, devices, providing comfortable conditions in the cabin of a vehicle, and air conditioning equipment

The heat exchanger // 2117892
The invention relates to a heat exchanger, in particular for installations operated with large load variations and/or temperature, for example as a cooler of the cooling air for the gas turbine containing tubes for separation of heat environment, in particular air, and heat-absorbing medium, in particular water, and heat transfer occurs by backflow pipes that serve as flow channels for the heat-absorbing medium, are sinuously between the intake and exhaust manifold pipes and the heat-release environment washes these winding pipe

FIELD: heating.

SUBSTANCE: wire-and-tube heat exchanger, in particular, for a domestic refrigerator, comprises two layers of wire and a refrigerant tube passing through the intermediate space between the layers. The intermediate space is filled at least partially with bitumen. The bitumen film is heated and pressed into inside the intermediate space through the gaps between the wires.

EFFECT: improved efficiency of heat exchange between the heat carrying medium and the energy accumulating medium regardless of the mounting position of a heat exchanger, simplified manufacturing.

14 cl, 6 dwg

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