Heat exchanger

Abstract

The heat exchanger includes: a heat exchanger main body that forms a flow path for fluid to flow through; a plurality of heat transfer tubes arranged in parallel in a manner extending along the extension direction of the flow path; and a baffle group having a plurality of baffles that support the heat transfer tubes and are arranged at intervals along the extension direction of the flow path. The baffles are arranged such that, when viewed from the extension direction of the flow path, each of them occupies only a part of the cross-section of the flow path. The plurality of baffles in the baffle group are arranged such that, when viewed from the extension direction of the flow path, at least a part of their respective occupied regions does not overlap, and when their respective occupied regions are combined together, they occupy the entire region of the cross-section of the flow path.

Description

Technical Field

[0001] The present invention relates to a heat exchanger.

[0002] This application claims the priority of Japanese Patent Application No. 2021-013819 filed in Japan on January 29, 2021, and incorporates its content herein. Background Art

[0003] For example, in a gas turbine combined cycle (GTCC), a heat exchanger is used to heat water by exchanging heat between the air discharged from a gas turbine and water. As the heat exchanger, a heat exchanger of a form conventionally called a shell-and-tube type is generally used. Such a heat exchanger mainly includes: a plurality of heat transfer tubes through which water flows; a heat exchanger main body that houses these heat transfer tubes and forms a flow path through which air flows; and a plurality of baffles arranged at intervals along the extending direction of the flow path. Each baffle closes a part of the flow path. The regions closed between adjacent baffles are different. Thus, the flow of the air flowing in the flow path meanders along the baffles, and therefore the heat exchange efficiency can be improved (for example, refer to the following Patent Document 1).

[0004] Prior Art Documents

[0005] Patent Documents

[0006] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2017-141983 Summary of the Invention

[0007] Technical Problem to be Solved by the Invention

[0008] However, in the heat exchanger as described above, due to the baffles, the flow meanders sharply, and thus the pressure loss with respect to the air flow may increase. In order to reduce the pressure loss, a method of increasing the interval (pitch) between the heat transfer tubes is also considered. However, at this time, the overall size and volume of the heat exchanger increase.

[0009] The present invention has been completed to solve the above problems, and an object thereof is to provide a heat exchanger that reduces pressure loss and is miniaturized.

[0010] Means for Solving the Technical Problem

[0011] In order to solve the above problems, the heat exchanger according to the present invention includes: a heat exchanger main body that forms a flow path through which a fluid flows; heat transfer tubes, in which a plurality of heat transfer tubes are arranged in parallel along the extension direction of the flow path; and a baffle group that has a plurality of baffles that respectively support the heat transfer tubes in the flow path and are arranged at intervals along the extension direction of the flow path. Each of the baffles is arranged such that, when viewed from the extension direction of the flow path, it occupies only a part of the cross-section of the flow path. The plurality of baffles of the baffle group are arranged such that, when viewed from the extension direction of the flow path, at least a part of their occupied areas do not overlap with each other, and when the occupied areas of each other are combined, they occupy the entire area of the cross-section of the flow path.

[0012] Advantages of the Invention

[0013] According to the present invention, it is possible to provide a heat exchanger that reduces pressure loss and is miniaturized. Description of the Drawings

[0014] Figure 1 is a schematic cross-sectional view showing the structure of the heat exchanger according to the first embodiment of the present invention.

[0015] Figure 2 is a projection view of the baffle group according to the first embodiment of the present invention when viewed from the extension direction of the flow path.

[0016] Figure 3 is a schematic cross-sectional view showing the structure of the heat exchanger according to the first modification of the first embodiment of the present invention.

[0017] Figure 4 is an enlarged view of the main part of the baffle according to the second embodiment of the present invention.

[0018] Figure 5 is an enlarged view of the main part of the baffle according to the third embodiment of the present invention.

[0019] Figure 6 is an enlarged view of the main part of the modified example of the baffle according to the third embodiment of the present invention.

[0020] Figure 7 is a two-sided view showing the structure of the baffle according to the fourth embodiment of the present invention. Detailed Embodiments

[0021] <First Embodiment>

[0022] (Structure of the Heat Exchanger)

[0023] Hereinafter, with reference to Figure 1 and Figure 2, the heat exchanger 100 according to the first embodiment of the present invention will be described. The heat exchanger 100 is provided, for example, in the middle of a gas turbine combined cycle. The heat exchanger 100 is used to heat water by exchanging heat between the air extracted from the gas turbine compressor and water, and to cool the air.

[0024] As Figure 1 shown, the heat exchanger 100 includes a heat exchanger main body 1, heat transfer tubes 2, and baffle groups G1, G2. A flow path F for fluid (air) to flow through is formed inside the heat exchanger main body 1. The heat transfer tubes 2 and the baffle groups G1, G2 are accommodated in the flow path F.

[0025] (Structure of the heat exchanger main body)

[0026] The heat exchanger main body 1 has a main body portion 10, a bottom portion 11, a partition plate 12, a gas inlet 13, a gas outlet 14, and a cutoff portion 3. The main body portion 10 is cylindrical. Hereinafter, the direction extending along the flow path F inside the main body portion 10 will be simply referred to as the "extending direction". On one side in the extending direction of the main body portion 10, a gas inlet 13 and a gas outlet 14 are provided. The gas inlet 13 extends upward from the main body portion 10. The gas outlet 14 extends downward from the main body portion 10. Air is introduced into the flow path F from the outside through the gas inlet 13. And, the air after flowing through the flow path F is discharged to the outside through the gas outlet 14. In the following description, one side in the extending direction will be referred to as the upstream side, and the other side will be referred to as the downstream side.

[0027] The end portion on the downstream side in the extending direction of the main body portion 10 is closed by the bottom portion 11. The bottom portion 11 is hemispherical and protrudes as a curved surface toward the downstream side from the end portion of the main body portion 10. Moreover, a partition plate 12 for partitioning the flow path F in the vertical direction is provided inside the main body portion 10. An opening H is formed in a portion of the partition plate 12 near the end portion on the downstream side. That is, the upper side region and the lower side region of the flow path F communicate with each other through the opening H. The cutoff portion 3 is a circular plate provided at the end portion on the downstream side of the main body portion 10. The cutoff portion 3 partitions between the main body portion 10 and the bottom portion 11. Thus, the air flowing in the flow path F does not flow into the inside of the bottom portion 11.

[0028] (Structure of the heat transfer tubes)

[0029] Regarding the heat transfer tubes 2, a plurality of them are arranged at intervals in the flow path F. Each heat transfer tube 2 has: a straight portion 20 that extends along the extending direction; and a bent portion 21 that connects the end portions on the downstream side of the straight portion 20 to each other. Specifically, the straight portion 20 of the heat transfer tube 2 located on the upper side of the partition plate 12 and the straight portion 20 of the heat transfer tube 2 located on the lower side of the partition plate 12 are connected by the bent portion 21. That is, the bent portion 21 bends from top to bottom as it goes downstream. In the flow path F, a plurality of such heat transfer tubes 2 are arranged three-dimensionally at intervals. The water introduced from the outside flows into the interior of the heat transfer tube 2. And the heat transfer tube 2 is preferably formed of a metal material such as a copper alloy with good thermal conductivity.

[0030] (Structure of the baffle group)

[0031] The above-mentioned heat transfer tubes 2 are supported and fixed to the heat exchanger main body 1 by baffle groups G1 and G2. Regarding the baffle group G1, a plurality of them (as an example, 3) are arranged along the extending direction from the upstream side of the flow path F. Regarding the baffle group G2, 2 are arranged adjacent to the baffle group G1 on the most downstream side and facing downstream.

[0032] The baffle group G1 has 4 baffles B1, B2, B3, and B4. Regarding these baffles B1, B2, B3, and B4, they are arranged at intervals along the extending direction. As Figure 2 shown, the areas of the respective baffles B1, B2, B3, and B4 are each set such that, when viewed from the extending direction, they only occupy a part of the flow path cross-section of the flow path F. Moreover, the areas / shapes of the baffles B1, B2, B3, and B4 belonging to the same baffle group G1 are set such that at least a part of their occupied regions do not overlap when viewed from the extending direction. And their areas are set such that if the occupied regions of these baffles B1, B2, B3, and B4 are combined together, they occupy the entire region of the flow path cross-section of the flow path F.

[0033] Specifically, the baffle B1 is located on the outermost peripheral side of the flow path F. The end on the outer peripheral side of the baffle B1 is fixed to the inner surface of the main body portion 10. The end on the outer peripheral side of the baffle B1 is arc-shaped. The end on the inner peripheral side of the baffle B1 is composed of 3 straight lines of equal length. The angle formed by the mutually adjacent straight lines is 120°.

[0034] The baffle B2 is located on the inner peripheral side of the baffle B1. When viewed from the extending direction, the end on the inner peripheral side of the baffle B1 and the end on the outer peripheral side of the baffle B2 are in contact with each other. That is, the end on the outer peripheral side of the baffle B2 is composed of the above-mentioned 3 straight lines. The end on the inner peripheral side of the baffle B2 is also composed of such 3 straight lines. And the baffle B2 is fixed to the heat exchanger main body 1 by a fixing portion S that protrudes upward.

[0035] The baffles B3 and B4 only differ in area / dimensions and have the same structure as the baffles B1 and B2. That is, the baffle B3 is smaller than the baffle B2, and the baffle B4 is smaller than the baffle B3. As described above, within the baffle group G1, as going from the upstream side to the downstream side in the extending direction, in a manner from the outer peripheral side toward the inner peripheral side, the respective occupied areas change step by step. In addition, within the baffle group G1, as going from the upstream side to the downstream side in the extending direction, in a manner from the inner peripheral side toward the outer peripheral side, the respective occupied areas can change step by step.

[0036] The baffle group G2 has two baffles B5 and B6. These baffles B5 and B6 are arranged at intervals along the extending direction. And, similarly to the above-mentioned baffle group G1, the areas of the respective baffles B5 and B6 are set such that when observed from the extending direction, they only occupy a part of the flow path cross-section of the flow path F. Moreover, the areas / shapes of the baffles B5 and B6 belonging to the same baffle group G2 are set such that when observed from the extending direction, at least a part of their respective occupied areas does not overlap. And, their areas are set such that if the occupied areas of these baffles B5 and B6 are combined together, they occupy the entire area of the flow path cross-section of the flow path F. As described above, in the baffle group G1 that occupies the parts near the gas inlet 13 and the gas outlet 14, and the parts other than the bent portion 21, the number of the baffles B1 to B4 is set to be 4 or more. And, the interval between the baffles B1 to B4 is preferably set to be 50% or more of the inner diameter of the main body portion 10. More preferably, the interval between the baffles B1 to B4 is set to be 2 times or more of the width of the baffles B1 to B4.

[0037] (Function and effect)

[0038] Next, the operation of the heat exchanger 100 will be described. When operating the heat exchanger 100, first, high-temperature air is introduced into the flow path F through the gas inlet 13. At the same time, water is made to flow through the heat transfer tubes 2. As Figure 1 shown by the arrows in, the air flows slowly and meanders in the upper-side flow path F while being guided by the plurality of baffle groups G1 and G2. Then, it flows into the lower-side flow path F through the opening H formed in the partition plate 12. Similarly in the lower-side flow path F, the air flows while meandering toward the gas outlet 14 while being guided by the baffle groups G1 and G2.

[0039] As described above, in the middle of the air flowing through the flow path F, heat exchange is performed with the water flowing in the heat transfer tubes 2. Thereby, the water is heated by the heat of the air and becomes high-temperature. On the other hand, the air that has lost heat is cooled and becomes low-temperature. Then, the water is taken out to the outside and supplied for various uses. The air is discharged to the outside.

[0040] Here, in recent years, there has been a strong demand to reduce the pressure loss of air in a heat exchanger. In response to this demand, for example, increasing the interval (spacing) between heat transfer tubes 2 is considered as one example. However, at this time, the overall size and volume of the device become larger, which may pose obstacles to installation and handling. Therefore, the above structure is adopted in the heat exchanger 100 according to the present embodiment.

[0041] According to the above structure, a baffle group G1 having four baffles B1, B2, B3, B4 and a baffle group G2 having two baffles B5, B6 are provided in the flow path F. Thus, during the flow of air through the plurality of baffle groups G1, G2, it meanders in a manner that avoids each baffle group G1, G2. The plurality of baffles B1, B2, B3, B4 or the baffles B5, B6 are configured such that their occupied areas do not overlap with each other. Therefore, the amount of deflection of the air flow generated when colliding with these baffles becomes relatively smaller. That is, these baffle groups G1, G2 do not seriously impede the air flow. Therefore, the pressure loss of the flow caused by the baffle groups G1, G2 can be suppressed to a small value. As a result, the performance (throughput) of the heat exchanger 100 can be further improved. And, since the spacing of the heat transfer tubes 2 can be maintained the same as in the past, it is also possible to avoid the enlargement of the heat exchanger 100.

[0042] Moreover, according to the above structure, the occupied areas of the plurality of baffles B1, B2, B3, B4 or the baffles B5, B6 change stepwise from the outer peripheral side toward the inner peripheral side. Therefore, the amount of deflection of the flow between adjacent baffles becomes even smaller. Thereby, the fluid can flow smoothly from the upstream side to the downstream side. As a result, the pressure loss caused by the baffles can be suppressed even smaller.

[0043] Here, near the bent portion 21 of the heat transfer tube 2, the direction of air flow changes through the opening H. Therefore, it is preferable to decelerate the flow velocity of the fluid. According to the above structure, in the baffle group G2 adjacent to the bent portion 21, the number of the baffles B5, B6 is smaller than that of the upstream baffle group G1. That is, in this baffle group G2, the proportion occupied by each of the baffles B5, B6 in the flow path cross section is large. In the baffle group G2, in order to stably support the heat transfer tube group as a vibration countermeasure, the proportion occupied by each of the baffles B5, B6 in the vibration flow path cross section is increased.

[0044] The first embodiment of the present invention has been described above. In addition, various changes or modifications can be made to the above structure as long as the gist of the present invention is not deviated from. For example, the number of the above baffle groups G1, G2 is an example, and it can be appropriately changed according to design and specifications. The same applies to the number of the baffles belonging to the baffle groups G1, G2.

[0045] Further, as an example, the heat exchanger main body 1 is horizontally placed such that the extending direction of the flow path F intersects with the vertical direction. The heat exchanger main body 1 can be vertically placed so that the flow path F extends along the vertical direction. If the heat exchanger main body 1 is vertically placed, the installation area of the heat exchanger 100 can be reduced.

[0046] <Modification of the First Embodiment>

[0047] Hereinafter, with reference to Figure 3 , a modification of the first embodiment will be described.

[0048] As Figure 3 shows, the heat exchanger 100 may include a supply unit 60 that supplies water from the outside to the heat transfer tubes 2, and a discharge unit 61 that discharges water from the heat transfer tubes 2 to the outside. The supply unit 60 and the discharge unit 61 are provided at an end on the side opposite to the bottom 11 in the extending direction of the main body portion 10.

[0049] The supply unit 60 is provided on the gas outlet 14 side (the lower half of the main body portion 10) with reference to the partition plate 12 in the main body portion 10. The straight portion 20 of the heat transfer tube 2 located above the partition plate 12 penetrates the main body portion 10 and communicates with the supply unit 60.

[0050] The discharge unit 61 is provided on the gas inlet 13 side (the upper half of the main body portion 10) with reference to the partition plate 12 in the main body portion 10. The straight portion 20 of the heat transfer tube 2 located below the partition plate 12 penetrates the main body portion 10 and communicates with the discharge unit 61.

[0051] In this modification, as shown by the thick arrows in Figure 3 , water is introduced into the heat transfer tubes 2 from the outside through the supply unit 60. Then, the water flows in the heat transfer tubes 2 and exchanges heat with the air in the flow path F. Then, the water flows out from the heat transfer tubes 2 to the outside through the discharge unit 61.

[0052] <Second Embodiment>

[0053] Next, with reference to Figure 4 , a second embodiment of the present invention will be described. In addition, the same reference numerals are given to the same structures as those in the first embodiment described above, and detailed descriptions thereof are omitted. And, in Figure 4 , among the baffles B1, B2, B3, B4, B5, B6, only one baffle B1 is representatively illustrated. As Figure 4 shows, in the present embodiment, a through hole h is formed in a portion of the baffle B1 through which the heat transfer tube 2 passes. The through hole h is formed so as to surround at least a part of the periphery of the heat transfer tube 2. In the example of Figure 4 , the through hole h is in a semi-circular arc shape. That is, the through hole h is formed in a 180° region around the heat transfer tube 2.

[0054] According to the above structure, the fluid (air) flows through the through-hole h to the downstream side, so that the increase in pressure loss caused by the installation of the baffle B1 can be suppressed to a smaller extent. As a result, the performance (processing capacity) of the heat exchanger 100 can be further improved.

[0055] The second embodiment of the present invention has been described above. In addition, various changes or modifications can be made to the above structure as long as the gist of the present invention is not deviated from.

[0056] <Third Embodiment>

[0057] Next, with reference to Figure 5 , the third embodiment of the present invention will be described. In addition, the same reference numerals are given to the same structures as those in the above embodiments, and the detailed description thereof is omitted. And, in the same manner as the second embodiment, only the baffle B1 is representatively illustrated for explanation. As Figure 5 shown, the baffle B1 has a peripheral portion 41 and a support portion 42. The peripheral portion 41 is in a circular ring shape surrounding the periphery of the heat transfer tube 2. The support portion 42 is in a rod shape connecting the adjacent peripheral portions 41 to each other. And the intersecting support portions 42 overlap each other. Thus, a gap like a grid is formed between the support portions 42.

[0058] According to the above structure, the air flows through the gap formed between the support portions 42, so that the increase in pressure loss caused by the installation of the baffle B1 can be suppressed to a smaller extent.

[0059] The third embodiment of the present invention has been described above. In addition, various changes or modifications can be made to the above structure as long as the gist of the present invention is not deviated from. For example, as a modification, as Figure 6 shown, a cut C can also be formed in a part of the peripheral portion 41. Regarding the cut C, two cuts are formed within an angular range of 90° that are opposed to each other in the peripheral portion 41. According to this structure, the fluid flows through the cut C of the peripheral portion 41 in addition to the gap between the support portions 42, so that the pressure loss caused by the installation of the baffle B1 can be suppressed to a smaller extent.

[0060] <Fourth Embodiment>

[0061] Next, with reference to Figure 7 , the fourth embodiment of the present invention will be described. In addition, the same reference numerals are given to the same structures as those in the above embodiments, and the detailed description thereof is omitted. And, in the same manner as the second embodiment, only the baffle B1 is representatively illustrated for explanation. As Figure 7As shown in FIG. 1 , the baffle B1 according to the present embodiment includes: a connection portion 52 for connecting the heat transfer tubes 2 to each other; and base end portions 51 provided at both ends of the connection portion 52. The base end portions 51 protrude from the heat transfer tube 2 toward the outer peripheral side, and have a streamlined cross-sectional shape from the upstream side to the downstream side in the extension direction. Furthermore, when viewed from the extension direction, the base end portions 51 and the connection portion 52 have a shape in which the central portion is contracted.

[0062] According to this structure, the base end portion 51 has a streamlined cross-sectional shape, thereby reducing the resistance of air flowing around the base end portion 51. As a result, the increase in pressure loss caused by the provision of the baffle B1 can be suppressed to a smaller extent. As a result, the performance (processing capacity) of the heat exchanger 100 can be further improved.

[0063] The fourth embodiment of the present invention has been described above. In addition, various changes or modifications can be made to the above configuration without departing from the gist of the present invention.

[0064] <Notes>

[0065] The heat exchanger 100 described in each embodiment can be understood, for example, as follows.

[0066] (1) The heat exchanger 100 involved in the first embodiment comprises: a heat exchanger body 1, which forms a flow path F for fluid to flow; a plurality of heat transfer tubes 2, which are arranged in parallel in the flow path F in a manner extending along the extension direction of the flow path F; and baffle groups G1 and G2, which have a plurality of baffles that respectively support the heat transfer tubes 2 in the flow path F and are arranged at intervals along the extension direction of the flow path F, each of the baffles being arranged so as to occupy only a portion of the flow path cross section when viewed from the extension direction of the flow path F, and the plurality of baffles of the baffle groups G1 and G2 being arranged so that, when viewed from the extension direction of the flow path F, at least a portion of their occupied areas do not overlap with each other, and their occupied areas are merged together to occupy the entire area of ​​the flow path cross section.

[0067] According to the above structure, the flow of the fluid meanders while passing through the plurality of baffle groups G1 and G2 to avoid each baffle. The plurality of baffles are configured so that the occupied areas do not overlap with each other, so the flow is not seriously impeded. Therefore, the pressure loss of the flow caused by the baffles can be suppressed to a small value.

[0068] (2) In the heat exchanger 100 involved in the second embodiment, in the plurality of baffles of the baffle groups G1 and G2, the respective occupied areas are changed in stages from the outer peripheral side to the inner peripheral side of the heat exchanger body 1 as they extend from the upstream side to the downstream side in the extension direction of the flow path F.

[0069] According to the above structure, the occupied areas of the multiple baffles change step by step from the outer peripheral side toward the inner peripheral side, so that the fluid can flow more smoothly from the upstream side to the downstream side. Thereby, the pressure loss caused by the baffles can be suppressed to a smaller extent.

[0070] (3) In the heat exchanger 100 according to the third mode, among the multiple baffles of the baffle groups G1 and G2, as going from the upstream side toward the downstream side in the extending direction of the flow path F, the occupied area of each baffle changes step by step in a manner from the inner peripheral side of the heat exchanger main body toward the outer peripheral side.

[0071] According to the above structure, the occupied areas of the multiple baffles change step by step from the inner peripheral side toward the outer peripheral side, so that the fluid can flow more smoothly from the upstream side to the downstream side. Thereby, the pressure loss caused by the baffles can be suppressed to a smaller extent.

[0072] (4) In the heat exchanger 100 according to the fourth mode, the heat transfer tube 2 has: a straight portion 20 extending along the extending direction; and a bent portion 21 connecting the downstream ends of the straight portion 20 to each other. In the lowermost downstream baffle group G2 adjacent to the bent portion 21, the number of the baffles is smaller than that of the other upstream baffle groups G1.

[0073] Here, the flow direction changes near the bent portion 21, so it is preferable to decelerate the flow velocity of the fluid. According to the above structure, in the baffle group G2 adjacent to the bent portion 21, the number of the baffles is smaller than that of the upstream baffle group G1. That is, in this baffle group G2, the proportion occupied by each baffle in the flow path cross section is larger. Therefore, the flow direction changes more sharply, and the fluid can be decelerated. As a result, the heat exchange between the heat transfer tube 2 and the fluid can be carried out more effectively.

[0074] (5) In the heat exchanger 100 according to the fifth mode, at least a part of the periphery of the heat transfer tube 2 in the baffle is formed with a through hole h penetrating the baffle along the extending direction.

[0075] According to the above structure, the fluid flows through the through hole h, so that the increase in the pressure loss caused by the baffle can be suppressed to a smaller extent.

[0076] (6) In the heat exchanger 100 according to the sixth mode, the baffle has: a peripheral portion 41 surrounding the periphery of the heat transfer tube 2; and a support portion 42 connecting the multiple peripheral portions 41 to each other and forming a gap therebetween.

[0077] According to the above structure, the fluid flows through the gap formed between the support portions 42, so that the increase in the pressure loss caused by the baffle can be suppressed to a small extent.

[0078] (7)In the heat exchanger 100 according to the seventh aspect, a cut C is formed in at least a part of the peripheral portion 41.

[0079] According to the above structure, the fluid flows through the cut C in the peripheral portion 41 in addition to the gaps between the support portions 42, so that the pressure loss caused by the baffle can be suppressed to be smaller.

[0080] (8)In the heat exchanger 100 according to the eighth aspect, the baffle has: a base end portion 51 that protrudes from the heat transfer tube 2 and has a streamlined cross-sectional shape extending from the upstream side to the downstream side in the extending direction; and a connecting portion 52 that connects the adjacent base end portions 51 to each other.

[0081] According to the above structure, the base end portion 51 has a streamlined cross-sectional shape, so that the resistance when air flows around the base end portion 51 becomes smaller. Thereby, an increase in the pressure loss caused by the provision of the baffle B1 can be suppressed to be smaller.

[0082] Industrial applicability

[0083] According to the present invention, a heat exchanger capable of reducing pressure loss and being miniaturized can be provided.

[0084] Symbol description

[0085] 100 - Heat exchanger, 1 - Heat exchanger main body, 2 - Heat transfer tube, 3 - Cutoff portion, 10 - Main body portion, 11 - Bottom portion, 12 - Partition plate, 13 - Gas inlet, 14 - Gas outlet, 20 - Straight portion, 21 - Bending portion, 41 - Peripheral portion, 42 - Support portion, 51 - Base end portion, 52 - Connecting portion, 60 - Supply portion, 61 - Discharge portion, B1, B2, B3, B4, B5, B6 - Baffle, C - Cut, F - Flow path, G1, G2 - Baffle group, H - Opening portion, h - Through hole, S - Fixing portion.

Claims

1. A heat exchanger, comprising: A heat exchanger main body that forms a flow path for a fluid to flow through; Heat transfer tubes, within the flow path, a plurality of which are arranged in parallel in a manner extending along the extending direction of the flow path; and A baffle group having a plurality of baffles that respectively support the heat transfer tubes within the flow path and are arranged at intervals along the extending direction of the flow path, Each of the baffles is arranged such that when viewed from the extending direction of the flow path, it respectively occupies only a part of the cross-section of the flow path, The plurality of baffles of the baffle group are arranged such that when viewed from the extending direction of the flow path, their respective occupied areas do not overlap, and by combining their respective occupied areas together, they occupy the entire area of the cross-section of the flow path, The baffle has: A peripheral portion that surrounds the periphery of the heat transfer tube; and A support portion that connects the plurality of peripheral portions to each other and forms a gap therebetween, A notch is formed in at least a part of the peripheral portion.

2. A heat exchanger, comprising: A heat exchanger main body that forms a flow path for a fluid to flow through; Heat transfer tubes, within the flow path, a plurality of which are arranged in parallel in a manner extending along the extending direction of the flow path; and A baffle group having a plurality of baffles that respectively support the heat transfer tubes within the flow path and are arranged at intervals along the extending direction of the flow path, Each of the baffles is arranged such that when viewed from the extending direction of the flow path, it respectively occupies only a part of the cross-section of the flow path, The plurality of baffles of the baffle group are arranged such that when viewed from the extending direction of the flow path, their respective occupied areas do not overlap, and by combining their respective occupied areas together, they occupy the entire area of the cross-section of the flow path, The baffle has: A base end portion that protrudes from the heat transfer tube and has a streamlined cross-sectional shape extending from the upstream side to the downstream side in the extending direction; and A connecting portion that connects the adjacent base end portions to each other.

3. The heat exchanger according to claim 1 or 2, wherein, Among the plurality of baffles of the baffle group, as going from the upstream side to the downstream side in the extending direction of the flow path, in a manner from the outer peripheral side of the heat exchanger main body toward the inner peripheral side, or in a manner from the inner peripheral side of the heat exchanger main body toward the outer peripheral side, their respective occupied areas are changed step by step.

4. A heat exchanger, comprising: A heat exchanger main body that forms a flow path for a fluid to flow through; A partition that divides the flow path into an upper region and a lower region; An opening formed in the partition to communicate the upper region and the lower region, and the opening is formed near the end portion on the downstream side of the upper region; Heat transfer tubes, within the flow path, a plurality of which are arranged in parallel in a manner extending along the extending direction of the flow path; and A baffle group having a plurality of baffles that respectively support the heat transfer tubes within the flow path and are arranged at intervals along the extending direction of the flow path, Each of the baffles is arranged such that when viewed from the extending direction of the flow path, it respectively occupies only a part of the cross-section of the flow path, A plurality of the baffles of the baffle group are arranged such that, when viewed in the extending direction of the flow path, at least a part of their respective occupied regions do not overlap, and the combined occupied regions of each other occupy the entire region of the cross section of the flow path. A plurality of the baffles of the baffle group in the upper region are such that as they go from the upstream side to the downstream side in the extending direction of the flow path, their respective occupied regions are gradually changed in a manner from the outer peripheral side of the heat exchanger body toward the inner peripheral side. A plurality of the baffles of the baffle group in the lower region are such that as they go from the upstream side to the downstream side in the extending direction of the flow path, their respective occupied regions are gradually changed in a manner from the inner peripheral side of the heat exchanger body toward the outer peripheral side. The baffle has: a peripheral portion that surrounds the periphery of the heat transfer tube; and a support portion that connects the plurality of peripheral portions to each other and forms a gap therebetween. A cutout is formed in at least a part of the peripheral portion.

5. A heat exchanger comprising: a heat exchanger body that forms a flow path through which a fluid flows; a partition plate that divides the flow path into an upper region and a lower region; an opening that is formed in the partition plate to communicate the upper region and the lower region, and the opening is formed near the downstream end of the upper region; a plurality of heat transfer tubes that are arranged in parallel in the flow path so as to extend along the extending direction of the flow path; and a baffle group that has a plurality of baffles that respectively support the heat transfer tubes in the flow path and are arranged at intervals along the extending direction of the flow path, each of the baffles is arranged such that when viewed in the extending direction of the flow path, it occupies only a part of the cross section of the flow path, a plurality of the baffles of the baffle group are arranged such that when viewed in the extending direction of the flow path, at least a part of their respective occupied regions do not overlap, and the combined occupied regions of each other occupy the entire region of the cross section of the flow path. A plurality of the baffles of the baffle group in the upper region are such that as they go from the upstream side to the downstream side in the extending direction of the flow path, their respective occupied regions are gradually changed in a manner from the outer peripheral side of the heat exchanger body toward the inner peripheral side. A plurality of the baffles of the baffle group in the lower region are such that as they go from the upstream side to the downstream side in the extending direction of the flow path, their respective occupied regions are gradually changed in a manner from the inner peripheral side of the heat exchanger body toward the outer peripheral side. The baffle has: a base end portion that protrudes from the heat transfer tube and has a streamlined cross-sectional shape that extends from the upstream side to the downstream side in the extending direction; and a connecting portion that connects the adjacent base end portions to each other.

6. The heat exchanger according to any one of claims 1, 2, 4, and 5, wherein the heat transfer tube has: a straight portion that extends along the extending direction; and a bent portion that connects the downstream ends of the straight portion, in the lowermost baffle group adjacent to the bent portion, the number of the baffles is smaller than that in other baffle groups located upstream.

7. The heat exchanger according to any one of claims 1, 2, 4, and 5, wherein At least a part around the heat transfer tube in the baffle is formed with a through hole that penetrates the baffle along the extending direction.

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