FI75423C - The heat exchanger module. - Google Patents

Description

75423 1 Heat exchanger module Värmeväxlarmodul 5 The invention relates to a heat exchanger module for heat recovery from air or gas or for cooling or heating air or gas, wherein the heat exchanger module has a duct part and inside the duct part there are heat exchanger devices consisting of at least one pipe.

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Heat exchanger units are already known, in which the heat exchanger is a modular structure, which structural unit can be connected to another similar unit and thus an overall structure of the desired size and with the desired heat exchange capacity can be formed. However, the disadvantages of the known units 15 are obvious. Lamellar heat transfer has been used in known structures. The cleanability of these units is very poor. It is very difficult to get between the lamella structures so that the middle areas of the lamella would also be cleaned.

20 A further disadvantage of the known lamellar solutions is the low conductance of the lamellar structure, especially at low end face speeds. The thermal resistance el of the lamelllrat solutions is also not sufficiently linear. The efficiency of the structure thus remains low.

In the heat exchanger according to the invention, it has been possible to create a completely new structural solution in which the disadvantages of known heat exchangers are avoided. The heat exchanger module according to the invention forms a structural unit. By combining these from the unit, either at the end or laterally, different heat exchanger designs are obtained, always according to the desired design 50 and heat exchange capacity. The heat exchanger module comprises an outer duct part which is suitably rectangular in cross-section. Inside the duct part, heat transfer tubes comprising needle-like rib sections are placed. These pipes are arranged side by side in a row, which row is corrugated inside the channel part.

55 Suitably, the bottoms and ridges of these corrugations strike both the cover plate and the base plate of the channel part. The laterally extreme ribs of the row are bounded by the two side walls of the channel section in question. 75423 1 of corrugations can always be the desired number according to the heat transfer need.

Heat transfer fluid is introduced into the heat exchanger tubes through a manifold, where the manifold has several manifold connections on top of the needle tube. At one end of the heat-5 exchange module there is still a second manifold with manifold connections to the other ends of the heat pipe.

The heat exchanger modules according to the invention can be connected laterally or end-to-end. In this case, their heat transfer medium circuits can be combined. The heat transfer fluid and the air flow are more suitable for each other in the entire area of the unit, in which case the so-called counter-current principle.

The invention is mainly characterized in that the rlp tube array is formed of rlpubes having needle-like ribs arranged next to each other, the rlpuber array being arranged inside the channel part in a corrugated structure, whereby the rlpuber array is substantially bounded by the walls of the channel part.

The invention will be described in more detail below with reference to the accompanying drawings.

Figure 1 shows a heat exchanger module according to the invention partially opened to show the internal structure.

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Figure 2 shows a heat exchanger structure formed of two heat exchanger modules according to the invention with the side plates removed to show the internal structures and in a schematic representation.

Figure 3 shows another embodiment of a modular structure. In the second module the air is heated and in the second module the heat is recovered from the exhaust air. The presentation is a schematic and the side panels have been removed to show the interior structures.

Fig. 4 schematically shows the connection of the thermal circuit of the two end-placed modules of Fig. 3 to each other.

75423 1 Figure 5 shows an embodiment of a distributor.

Figure 6 shows a structure assembled from modules according to the invention in connection with an exhaust air fan, 5

Fig. 7 is a plan view of the structure of Fig. 6 with the cover plate removed.

Figure 8A shows the fin tube structure in more detail and from the front.

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Fig. 8B shows the rib tube structure of Fig. 8A along the section line I-I of Fig. 8A.

Figure 8C is shown in Figure 8A ripaputkirakenne arrow C direction.

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Figure 1 shows a heat exchanger module according to the invention, which is indicated by the general reference number 1. The heat exchanger module 1 comprises a duct part 2, which is preferably rectangular in cross section. The duct part 2 comprises an upper duct part 2a and a bottom duct part 2b, as well as side walls 2c and 2d. Inside the duct-20 part 2 there is a heat exchanger 3. One of the parts 2a, 2b, 2c or 2d may be removable to allow washing of the heat exchanger surfaces. The heat exchanger 3 preferably consists of rib tubes 3a arranged side by side. Each tube 3a comprises needle-shaped rib sections 3b. The fin pipes are arranged in a row next to each other in the duct part 2 and connected at their ends to the first distribution device 4 and at the other end to the second distribution device 5. The distribution device 4 comprises several distribution connections 4a. Connected to these manifolds 4a is the other end of each rib tube 3a. The other ends of said rib tubes 3a, on the other hand, are connected to the distribution terminals 5a of the second distribution device 5.

The ribs 3a are arranged in a row next to each other in the channel part 2 so that the ribs 3b of said adjacent ribs are partially interleaved approximately the entire distance of the rib. This row of pipes formed by the rib tubes 3a is corrugated inside the channel part 2. This corrugation of the array may have taken place in such a way that one end of the array of riapaputkiri-35 is located against the top wall portion and the other end against the bottom back portion and the ridges and bottoms of the waves are located in the intermediate area of the channel part 2. The row of finned tubes is then limited to the side walls of the duct part 2 by its extreme finned tubes. According to the invention, however, the corrugation of the array is preferably effected in such a way that the crest of the corrugation hits the cover portion 2a of the channel part 2 and the corrugations of the rib array collide with the bottom portion 2b of the channel portion 2. The ribs 3b of the extreme lateral ribs 3a of the rib tube array again strike the side walls 2c and 2d of the channel part 2. The array of fin pipes is thus limited to substantially all the walls of the duct part 2.

The heat exchanger module 1 has an inlet 6 for incoming air 10 or gas at one end of the module. This inlet 6 can be located either in the end portion 2e of the heat exchanger module 1 in its bottom portion 2b or as shown in the figure with the end open. The air or gas outlet 7 is located at the other end of the heat exchanger module 1, and said opening 7 can also be located so that the end portion itself is closed by a plate and the opening 15 is located somewhere in the wall of the duct part 2. The same applies to the air and gas inlet 6. The incoming air or gas from which heat is recovered or heated is transferred from the inlet area d ^ by the arrow L significantly through the rib row to the rib free space d ^ and further through the rib row to the rib free area d ^ and further through the ribs ri-20 butter to the free discharge area d ^, from which it exits through the end opening 7. The end opening 7 can also be located in the wall portion of the end of the channel part 2. The air or gas thus has to pass three times through the ribbed array. In this case, heat recovery is efficient or, in the case of heating air or gas, heat transfer to air or gas is efficient.

In the heat exchange module 1, a duct part 2 may have a bypass valve for the air or gas entering the module 1 in one of the cover-bottom or side plates of the duct part 2. The first bypass valve 8 can already be located in the side wall 2c of the modular structure in the air or gas inlet area d 1. The side wall 30 2c may have a second bypass valve 9 in the region d1. When the heat exchanger modules 1 are connected laterally to each other, the adjustment of the two adjacent modules 1 can thus take place by adjusting said bypass valves. The states d 1 and / or d 2 can thus be connected via the bypass valve 9 and / or the bypass valve 8 to the second heat exchanger module 35 connected in parallel to its respective regions d 1 and / or d 2. In this way, heat exchanger dusting can also be adjusted by adjusting the open positions of the bypass valves.

75423 1 Figure 2 shows two superimposed heat exchanger modules 1a and Ib with the side plates removed to show the internal structures. The heat exchange function can be controlled via bypass valves 8 and 9. From the area d 1 of the module 1a there is a connection via the bypass valve 8 to the corresponding area of the heat exchanger module 5 Ib and through the bypass valve 9 there is a connection from the area d 1 of the module 1a to the corresponding area d 2 of the adjacent heat exchanger module Ib and through the passage 10 in the duct part 2 ^ to the corresponding area d, of the adjacent module. Air or gas enters the heat exchanger module 1a with the arrow 10 in the region d ^. It circulates through the entire rib structure and through the opening 10 to the second module Ib and further through the rib structure, leaving the second heat exchanger module Ib from its region d ^ further out of the unit Ib by the arrow L ^ significantly. However, the air can also be circulated through the already mentioned bypass valves 8 and 9 to the adjacent heat exchanger module Ib, and by adjusting the opening of these valves, the amount of the respective flow or bypass flow can be adjusted.

The heat transfer medium must be connected along the connection e to the heat exchanger module Ib with those 20. It circulates through the flue pipe array and exits the heat exchanger module Ib along the connection f to the second parallel heat exchanger module 1a indicated by the arrow f and passes through the flue pipe array of said module exiting one g along the heat exchanger module 1a indicated by the arrow.

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Figure 3 shows again two heat exchanger modules 1 according to the invention connected to each other at the ends. The air or gas from which the heat is recovered enters the heat exchanger module le from the inlet 6a marked with an arrow. The air circulates past the ribs 30 of the corrugated rib row of the modular structure and exits the outlet 7a marked with an arrow after transferring its heat to the heat transfer medium flowing in the heat exchanger tubes. The air or gas in question (arrow L ^) can be the exhaust air or gas of the building. The module structure further comprises a second module Id connected end-to-end with the heat exchanger module le, which further has an inlet 35 6b and an outlet 7b with air or gas. The air in question entering the unit Id can now be air sucked and heated from the outside. Its entry is indicated by an arrow and its exit by an arrow L ^. It is essential that the conveying circuits of these adjacent units 6 75423 1 den le and id of the thermal bleach are connected in series. In the heat exchanger module le, the heated heat transfer medium continues to flow to the heat exchanger module Id and in this module the heat transfer medium now in turn transfers its heat to air or gas which is circulated in said heat exchanger module Id and which can be externally sucked into the building. This recirculation is effected by the circulation pump 11. No essential other units are required, only the piping and the actuators of the circulation pump 11.

Fig. 4 shows the circuit of the heat exchanger of the modular structure shown in Fig. 3 partly diagrammatically. The outlet of the pump 11 is connected to a connection 12a, which is further connected to the distributor 4 of the second heat exchanger module suitably in a distribution pipe. The inlet of the pump 11 is connected to a pipe 12b, which is further connected to the second heat exchanger module 15 to its distribution device 4, suitably to the distribution pipe. Preferably, the end of the manifold of the second distributor 5 of the heat exchanger module Id is connected to the end of the tube of the second distributor 5 of the second heat exchanger module 5 by means of a pipe or the like and a dashed line. The respective distribution devices of the respective adjacent heat exchanger modules Id and le 20 can also be connected from the central areas of the distribution devices by a single one marked with icy and dashed lines. The pump 11 circulates the heat exchanger significantly with the arrow P 2 first to the heat exchanger module Id to the distributor 4 and from there through the distribution connections 4a to the fin pipes and further to the second distribution device S of the heat exchanger module Id through the distribution connections 5a 25 and further via the connection h 2 and / or h 2 to the second heat exchanger module through the distribution connections 5a of the distributor 5 to the fin pipes and further through the corrugated rib pipes to the distribution device 4 of the heat exchanger module le through its distribution connections 4a. From the heat exchanger module le, the heat transfer medium exits through the distributor 30 4 along the connection 12b and, as it is further circulated by the pump 11, it flows again into the connection 12a. In such an interconnection of the two modules le and Id, a relatively complete countercurrent recirculation perlate of the heat transfer medium takes place with respect to the incoming air or gas.

Figure 5 shows an embodiment of a dispenser 4 according to the invention. The manifold 4 is preferably a tubular structure into which the heat transfer medium is introduced either through the manifolds 4a on the sides of the tube or 7 75423 1 then from the end of the tube. Recycling can also be the opposite. Through the manifolds 4a there is a flow connection to the center of the tubular frame structure 4b. According to the invention, in the heat exchanger module 1, the first distribution device 4 is formed such that the distribution connections 4a of the distribution device 4 are located on the side surfaces of the tubular body 4b of the distribution device 4 at a regular distance from each other. Through the distribution connections 4a there is a connection to the hollow interior of the tubular body 4b. There are as many distribution connections 4a as there are ribs 3a in the row. The distribution connections 4a of the first distribution device 4 are so arranged relative to each other. Each of the other flow openings 4a ^, 4a ^, 4a ^, ... of the respective distribution connections 4a is arranged in approximately the same plane with each other and likewise every other flow openings 4a2 »4a ^, 4β ^, ... are arranged in approximately the same plane with each other. Thus, the distributor 4 leaves a significant gap in the initial stage between the adjacent rib tubes 3a. An intermediate space E is left between the opposite ends of the ribs of adjacent rlpipes.

15 However, as the first corrugation or ridge of the row progresses, the adjacent rib tubes are brought to the same level. Thus, at this stage, all the adjacent rib tubes 3a are already partially interleaved in their ribs. This rather large gap E for the initial part of the line between the adjacent rib tubes allows the larger air or gas 20 contaminants to remain between the needle ends of the adjacent ribs, i.e. in the intermediate spaces E, at an early stage.

Likewise, in the heat exchanger module 1 according to the invention, condensation of the air 25 or the water contained in the gas takes place already in the initial stage before the first corrugated brush or bottom of the rib tube and at the same time the initial filtration of the air or gas in question. The bottom of the heat exchanger module may have condensed water outlets 13.

Figures 6 and 7 show, partly in diagrammatic form, a heat recovery structure assembled from 30 heat exchanger modules according to the invention. The heat exchanger modules 1, of which there are four in the application, are located around the top extractor 14 or other gas or air inlet duct. The heat exchanger modules 1 are placed on the base plate 15 and a cover plate 16 is placed to cover the structure. Air or gas enters through the inlet duct 17 or equivalent and / or through the top extractor 14 to the inlet openings 6 of the four heat exchanger modules 1 and exits air or gas after transferring its heat to the thermal fuel from those 8 75423 1 modules 1. The entry of air or gas into the structure is marked with an arrow L and the exit from the structure is marked with the letter P.

Figures 8A-8C show the rib tube structure in more detail. The rib tube structure 5 comprises a central tube 3a and a strip of a plurality of needle-shaped rib portions 3b wrapped and secured around it. The strip structure consists of a base portion facing the surface of the tube 3a, comprising a wide bottom portion a of the tube 3a and at least two cover portions b1 and b2, each of which is associated with a rib row, the rib row 10 comprising needle-like ribs 3b. There are usually two sets of ribs. The needle-like ribs 3b of the rib rows are at an angle y 'to their transverse axis with respect to the surface of the tube 3a perpendicular to the axis y. The needle-like ribs 3b are rotated about the longitudinal axis y 'of the rib 3b at an angle cmax, the angle of which is formed by a longer cross-section of the rib with the longitudinal axis, i.e. the x-axis, of the tube 3a. The angle e <^ is preferably 2-45 ° and the angle is preferably 0-90 °. The conductance of the needle tube structure consisting of needle-like rib sections is substantially linear over the entire flow range, i.e. even at low flow rates.

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Claims (18)

75423 A heat exchanger module (1) for recovering heat from air or gas or for cooling or heating air or gas, wherein the heat exchanger module (1) has a duct part (2) and inside the duct part (2) there are corrugated heat exchanger devices consisting of at least one rib row of ribs, characterized in that the rib tube row is formed by rib tubes (3a) comprising needle-like ribs (3b) placed next to each other, the rib row being arranged inside the channel part (2) into a corrugated structure, the rib section being substantially bounded . 1 Claims Heat exchanger module according to claim 1, characterized in that the corrugations and bottoms of the ribbed row are corrugated in the channel groove (2) to its cover plate (2a) and base plate (2b) and that the ribs of laterally extreme tubes of the ribbed row are flanked by side walls (2). Heat exchanger module according to the preceding claim, characterized in that one end of the rib tubes (3a) is connected to the first distributor (4) at its distribution connections (4a) and the other ends are connected to the second distribution device (5) at its distribution connections (5a). Heat exchanger module according to Claim 1, 2 or 3, characterized in that one of the plates (2a or 2b or 2c or 2d) of the module (1) is removable, thus enabling easy washing of the rib tube structure. Heat exchanger module according to one of the preceding claims, 30. characterized in that the flow openings (4a ^ ...) of the adjacent distribution connections (4a) of the first distributor (4) are arranged so that every second flow openings (4a ^, 4a ^, 4a ^) ...) are approximately in the same plane with each other and every other (4a2 »4a ^ f4β ^, ...) are approximately in the same plane with each other. 35 Heat exchanger module according to one of the preceding claims, characterized in that the duct part (2) comprises a bypass valve 1 (8 and / or 9). V 5 4 2 3 Heat exchanger module according to one of the preceding claims, characterized in that a ribbon comprising needle-like rib sections (3b) is provided around the rib tube (3a). Heat exchanger module according to one of the preceding claims, characterized in that a strip comprising a plurality of needle-like rib sections (3b) is wrapped and secured around the tube (3a) and said strip structure is formed by a base portion comprising the tube (3a) a wide base portion (a) and at least two cover portions (b1) and (b2) against the surface, each of which is joined by a row of ribs comprising needle-like ribs (3b). Heat exchanger module according to the preceding claim, characterized in that the rib-free needle-like ribs (3b) are at an angle ¢ (^) to the surface of the tube (4a) perpendicular to the surface (y) of the tube (4a) and that the needle-like ribs (3b) are rotated about the longitudinal axis (y ') of the rib (3b) at an angle (α1) whose angle 20 mu ° is formed by the longer side (3c) of the cross-section of the rib with the longitudinal axis of the tube (3a), i.e. the x-axis. Heat exchanger module according to the preceding claim, characterized in that the angle 0 (?) Is 2-45 ° and the angle is 0-90 °. Heat exchanger module structure formed by one of the heat exchanger modules according to Claims 1 to 10, characterized in that a second heat exchanger module (Ib) is arranged side by side on the heat exchanger module (1a), said two heat exchanger modules (Ia or Ib) having air a gas recirculation port (10) from the first heat exchanger module (Ia) to the second heat exchanger module (Ib). . Structure according to the preceding claim, characterized in that the region (dp and / or region ^ 2) of the heat exchanger module (Ia) is connected to the region (d 1) and / or or area ^ 2) · Structure according to one of the preceding claims, characterized in that the heat transfer medium circuits of the heat exchanger module (Ia) are connected. 11 75423 Structure according to the preceding claim, characterized in that the second distributor (5) of the heat exchanger module (Ia) is connected to the second distributor (5) of the heat exchanger module (Ib). Heat exchanger structure formed by heat exchanger modules 10 according to one of Claims 1 to 10, characterized in that the heat exchanger module (1e) is connected to the second heat exchanger module (Id) in such a way that the heat transfer medium is adapted to pass directly from the heat exchanger module ) to the heat transfer medium duct and that the air or gas from which the heat 15 is recovered is adapted to pass through the heat exchanger module (le) entering the structure as indicated by the arrow (L ^) and leaving the module (le) as indicated by the arrow (L ^) and circulating in the second heat exchanger module (Id). air or gas that is cooled as air or gas enters the heat exchanger module (Id) as indicated by the arrow (L ^) and exits the heat exchanger module (Id) as indicated by the arrow (L ^). Structure according to the preceding claim, characterized in that the heat transfer fluid is circulated by a pump (11) so that the heat transfer medium passes through a pipe (12a) to the distributor (4) of the heat exchanger module (Id) and further through manifolds (4a) along the fin ) to the distributor (5) and from said distributor to the distributor (5) of the heat exchanger module (le) and from said distributor (5) via manifolds (5a) along the fin piping (3a) to the distributor (4) of the heat exchanger module (le) and further along the pipe (12b) 30 for the pump (11). Assembly assembled from heat exchanger modules according to one of Claims 1 to 10, characterized in that the heat exchanger modules (1) are arranged circumferentially around the air or gas inlet duct (17) and / or the top combine (14). A structure according to the preceding claim, characterized in that the heat exchanger modules (1) of four are arranged on a base (15) and said structure is covered by a cover plate (16). 5 10 15 20 25 30 35 75423