Gas-liquid heat exchanger member, gas-liquid heat exchanger, and method for manufacturing gas-liquid heat exchanger member

Abstract

To provide a gas-liquid heat exchanger suitable for heat transport using self-excited thermoacoustic vibration. [Solution] The gas-liquid heat exchanger member 1 of the present invention has a main body 11 in which heat exchange takes place between a gas introduced therein and a liquid introduced therein, the main body 11 has a shape that is approximately cylindrical having a first bottom surface 111 and a second bottom surface 112 that are approximately parallel to each other, and is provided with a plurality of holes 113 that linearly connect both bottom surfaces, the plurality of holes 113 are provided so that a gas G is introduced therein and are approximately parallel to the height direction (first direction D1) of the main body 11 and are arranged in a plurality of rows along a predetermined direction (second direction D2) that is approximately perpendicular to the first direction, the main body 11 has a shape provided with a plurality of slits 118 through which a liquid is introduced, and the slits 118 are provided linearly between the plurality of rows described above from one end side of the above-mentioned rows in the main body 11 to the other end side of the above-mentioned rows in the main body 11 so as not to intersect with the holes 113.

Description

[Technical field]

[0001] The present invention relates to a gas-liquid heat exchanger member, a gas-liquid heat exchanger, and a method for manufacturing a gas-liquid heat exchanger member. [Background technology]

[0002] In order to improve safety, cost-effectiveness, etc., in heat transport from high-temperature industrial furnaces, a technology (Patent Document 1) has been proposed in which the high-temperature side heat exchanger is configured as a pin-type heat exchanger having a rod-shaped heat receiving part that is integrated with the base part in a thermoacoustic device in which a heat accumulator arranged in a pipe is sandwiched between a high-temperature side heat exchanger (first heat exchanger) and a low-temperature side heat exchanger (second heat exchanger). The technology described in Patent Document 1 can improve the amount of heat transport in heat transport using self-excited thermoacoustic vibration. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7270144 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, Patent Document 1 discloses that the high-temperature side heat exchanger is a pin-type heat exchanger suitable for heat transport using thermoacoustic self-excited oscillation, but only indicates the use of conventional technology by stating that the low-temperature side heat exchanger is "preferably a shell-and-tube gas-liquid heat exchanger." Therefore, Patent Document 1 has room for further improvement in terms of configuring the low-temperature side heat exchanger of the thermoacoustic device to be suitable for heat transport using thermoacoustic self-excited oscillation.

[0005] An object of the present invention is to provide a gas-liquid heat exchanger suitable for heat transport using thermoacoustic self-excited vibration. [Means for solving the problem]

[0006] As a result of intensive research into solving the above problems, the inventors of the present invention found that the above object could be achieved by making the main body of the gas-liquid heat exchanger columnar, providing a plurality of rows of holes that communicate the main body in the height direction, and providing slits in the main body between these rows that communicate the main body without intersecting with the holes, so that heat exchange occurs between the gas introduced into the holes and the liquid introduced into the slits, and making the inner surfaces of these holes smooth, etc. Specifically, the present invention provides the following.

[0007] The invention according to a first aspect of the present invention provides a member for an air-liquid heat exchanger, comprising: a main body portion in which heat exchange takes place between a gas introduced therein and a liquid introduced therein; the main body portion has a generally cylindrical shape having one bottom surface and another bottom surface that are generally parallel to each other; and the main body portion has a shape in which a plurality of holes are provided that linearly connect the one bottom surface to the other bottom surface; the plurality of holes are provided in a plurality of rows along a predetermined direction that is generally perpendicular to the height direction, into which the gas is introduced; the inner surface of the holes is a smooth columnar shape that does not substantially impede the vibration of the gas when the gas is introduced therein; the main body portion has a shape in which a plurality of slits are provided through which the liquid is introduced; and the slits are provided linearly between the plurality of rows from one end side of the rows in the main body portion to the other end side of the rows in the main body portion so as not to intersect with the holes.

[0008] In conventional gas-liquid heat exchangers, turbulence is formed in the gas-side flow path to promote gas heat exchange. On the other hand, in a heat exchanger for a thermoacoustic device, which is a device that utilizes the thermoacoustic phenomenon caused by an oscillating flow in the working fluid caused by self-excited vibrations, etc., it is important that the oscillating flow in the working fluid is not hindered in order to improve the efficiency of generating and using the oscillating flow in the thermoacoustic device. Therefore, a configuration in which turbulence is not formed in the gas, which is the working fluid, is desired for a heat exchanger for a thermoacoustic device.

[0009] In the present invention, a plurality of holes through which gas is introduced are provided so as to linearly communicate from one bottom surface to the other bottom surface of the main body, which is substantially cylindrical in shape. As a result, the gas-liquid heat exchanger member of the present invention can be disposed in the tube of the thermoacoustic device so that the axial direction of the thermoacoustic device and each of the bottom surfaces of the main body are substantially perpendicular. As a result, the present invention prevents the phase of the oscillatory flow along the axial direction at each of the bottom surfaces from becoming uneven, forming turbulence and inhibiting the oscillatory flow. In addition, the present invention also prevents the formation of turbulence in the holes, which are the gas-side flow paths, by having the inner surfaces of the plurality of holes be smooth and cylindrical, which does not substantially inhibit the vibration of the gas introduced therein.

[0010] This invention compensates for the decrease in heat exchange efficiency caused by the lack of turbulence in the holes, which are the gas-side flow paths, by the dream pipe effect associated with the oscillating flow. The dream pipe effect is an effect in which the effective thermal conductivity of the working fluid inside the flow path becomes higher than the original thermal conductivity of the working fluid due to vibration in the direction along the flow path. As a result, this invention achieves effective heat exchange despite being configured to avoid turbulence formation, which is the exact opposite of conventional heat exchangers for use in thermoacoustic devices.

[0011] In order to effectively utilize the dream pipe effect, the flow path must be thin according to the frequency of the self-excited vibration. This invention has a unique configuration in which slits are provided between rows of holes to serve as the flow path through which the liquid is introduced, making it easy to provide a liquid-side flow path even when the hole through which the gas is introduced is thin.

[0012] As described above, the present invention can provide a gas-liquid heat exchanger suitable for heat transport using thermoacoustic self-excited vibration.

[0013] A second aspect of the present invention provides a member for an air-liquid heat exchanger, which is the first aspect of the invention, wherein the plurality of holes have inner surfaces smoothed by wire electric discharge machining.

[0014] When the hole through which the gas is introduced is narrowed so that heat exchange by the dream pipe effect can be effectively performed, it is difficult to process the inner surface of the hole into a smooth columnar shape. This invention makes it possible to process the inner surface of the hole into a smooth columnar shape by wire electric discharge machining, even when the hole through which the gas is introduced is narrow. As a result, this invention realizes both a smooth columnar shape for the inner surface of a narrow hole that effectively exerts the dream pipe effect, and effectively performing heat exchange by the dream pipe effect without substantially impeding the vibration of the gas.

[0015] As described above, the present invention can provide a gas-liquid heat exchanger suitable for heat transport using thermoacoustic self-excited vibration.

[0016] A third aspect of the present invention provides a member for an air-liquid heat exchanger according to the first or second aspect of the invention, wherein the plurality of slits have inner surfaces smoothed by wire electric discharge machining.

[0017] In the low-temperature heat exchanger for a thermoacoustic device, the opening ratio of the working fluid side flow passage is required to be high so as not to impede the oscillating flow. In addition, the working fluid side flow passage of the low-temperature heat exchanger for a thermoacoustic device requires narrow holes to effectively exert the dream pipe effect. If the row of holes is configured to satisfy these conditions, the width of the slit becomes small. On the other hand, in the low-temperature heat exchanger for a thermoacoustic device, in order to stabilize the temperature ratio on both sides of the heat storage unit, it is required to suppress the pressure loss in the liquid side flow passage and stabilize the temperature of the cooling liquid.

[0018] This invention uses wire electric discharge machining to smooth the inner surface of the slit through which the liquid is introduced. As a result, this invention can suppress pressure loss in the liquid-side flow path and stabilize the temperature of the cooling liquid even if the slit is thin, due to the configuration that takes into account the aperture ratio of both bottom surfaces and the dream pipe effect.

[0019] As described above, the present invention can provide a gas-liquid heat exchanger suitable for heat transport using thermoacoustic self-excited vibration.

[0020] A fourth aspect of the present invention provides an air-liquid heat exchanger comprising: an air-liquid heat exchanger member according to any one of the first to third aspects; and a hollow shell that houses the air-liquid heat exchanger member, wherein the shell houses the air-liquid heat exchanger member so as not to block at least a portion of the holes on both the one bottom surface and the other bottom surface of the main body and not to block at least a portion of the slits on both the one end side and the other end side of the main body, the shell has a plurality of openings that communicate between the inside and the outside of the shell along the specified direction, at least a portion of the plurality of openings are provided on the same side as the one end side when viewed from the center of the air-liquid heat exchanger member, and at least a portion of the plurality of openings are provided on the same side as the other end side when viewed from the center of the air-liquid heat exchanger member.

[0021] The invention reduces pressure loss when the cooling liquid passes from one end of the shell exterior through the slit to the other end of the shell exterior by devising an orientation of the opening, thereby reducing pressure loss in the liquid-side flow path and stabilizing the temperature of the cooling liquid.

[0022] As described above, the present invention can provide a gas-liquid heat exchanger suitable for heat transport using thermoacoustic self-excited vibration.

[0023] A fifth aspect of the present invention is a method for manufacturing a member for an air-liquid heat exchanger, comprising: an opening step for opening a plurality of holes linearly connecting from the one bottom surface to the other bottom surface and slits that do not intersect with the holes in a material for a main body having a generally cylindrical shape with one bottom surface and another bottom surface that are generally parallel to each other; and a smoothing step for smoothing the inner surfaces of the holes, wherein in the opening step, the plurality of holes are opened generally parallel to the height direction of the main body and are opened to form a plurality of rows along a predetermined direction generally perpendicular to the height direction, and the slits are opened linearly between the plurality of rows from one end side of the rows in the main body to the other end side of the rows in the main body so as not to intersect with the holes.

[0024] This invention makes it possible to provide an air-liquid heat exchanger component according to the first to third features, even in the case where multiple holes are configured as thin holes so as to effectively exert the dream pipe effect, by a procedure of smoothing the inside of the pilot holes opened in the opening process by wire electric discharge machining or the like.

[0025] As described above, the present invention can provide a gas-liquid heat exchanger suitable for heat transport using thermoacoustic self-excited vibration. Effect of the Invention

[0026] As described above, the present invention can provide a gas-liquid heat exchanger suitable for heat transport using thermoacoustic self-excited vibration. [Brief description of the drawings]

[0027] [Figure 1] FIG. 1 is an isometric view of a gas-liquid heat exchanger E of the present embodiment. [Diagram 2] FIG. 2 is an isometric view of the gas-liquid heat exchanger component 1 of FIG. [Diagram 3] FIG. 3 is a top view of the gas-liquid heat exchanger member 1 of FIG. [Figure 4] FIG. 4 is a front view of the gas-liquid heat exchanger member 1 of FIG. [Diagram 5] FIG. 5 is a right side view of the gas-liquid heat exchanger member 1 of FIG. [Figure 6] FIG. 6 is a front view of the gas-liquid heat exchanger E of FIG. [Figure 7] FIG. 7 is a flowchart showing an example of a preferable flow of the method for manufacturing the gas-liquid heat exchanger E according to this embodiment. [Figure 8] FIG. 8 is a schematic diagram of a thermoacoustic device T to which the gas-liquid heat exchanger E of this embodiment is attached. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] Hereinafter, an example of a preferred embodiment of the present invention will be described with reference to the drawings. Note that this is merely an example. The technical scope of the present invention is not limited to this example.

[0029] Fig. 1 is an isometric view of the gas-liquid heat exchanger E of the present embodiment. The following is an example of a preferred embodiment of the gas-liquid heat exchanger E of the present embodiment using Fig. 1.

[0030] [Gas-liquid heat exchanger E] The gas-liquid heat exchanger E includes a gas-liquid heat exchanger member 1 and a shell 2. The shell 2 houses the gas-liquid heat exchanger member 1 so as not to block at least some of a plurality of holes 113 on both bottom surfaces of a main body 11 of the gas-liquid heat exchanger member 1 described later.

[0031] [Gas-liquid heat exchanger components 1] Fig. 2 is an isometric projection view of the gas-liquid heat exchanger member 1 of Fig. 1. Fig. 3 is a top view of the gas-liquid heat exchanger member 1 of Fig. 2. Fig. 4 is a front view of the gas-liquid heat exchanger member 1 of Fig. 2. Fig. 5 is a right side view of the gas-liquid heat exchanger member 1 of Fig. 2. The following is an example of a preferred embodiment of the gas-liquid heat exchanger member 1 of this embodiment using Figs. 2 to 5.

[0032] (Main body 11) The main body 11 is a member in which heat exchange takes place between the gas G introduced therein and a liquid (not shown) introduced therein. The shape of the main body 11 is a generally cylindrical shape having one bottom surface (e.g., a first bottom surface 111) and another bottom surface (e.g., a second bottom surface 112) that are generally parallel to each other, and is provided with a plurality of holes 113 that linearly communicate from the first bottom surface 111 to the second bottom surface 112.

[0033] The holes 113, into which the gas G is introduced, are provided substantially parallel to the height direction (e.g., first direction D1) of the main body 11, and are provided in a plurality of rows along a predetermined direction (e.g., second direction D2) substantially perpendicular to the first direction D1. The shape of the inner surface of the hole 113 is a smooth columnar shape that does not substantially inhibit the vibration of the gas G when the gas G is introduced into the hole 113.

[0034] The spacing between the rows is not particularly limited. In order to achieve a high aperture ratio that does not inhibit the oscillatory flow when attached to a thermoacoustic device, the spacing between the rows d [m] is preferably in the range of r / 5 or more and 2r or less, where r [m] is the radius of the hole 113. In order to achieve a high aperture ratio, the spacing between the holes 113 in the row g [m] is preferably in the range of r / 10 or more and r or less.

[0035] In order to increase the contact area between the gas G and the main body 11 and to favorably exert the dream pipe effect, the radius r [m] of the hole 113 is set to be (260k / (ωρc p )) 1 / 2 is in the vicinity of (100k / (ωρc p )) 1 / 2 Above, (720k / (ωρc p )) 1 / 2 It is preferable that ω[s -1 ] is the angular frequency of the vibration of gas G, k [W / K m] is the thermal conductivity of gas G, and ρ [kg / m 3 ] is the density of gas G, c P [J / kg K] is the specific heat capacity of gas G.

[0036] For example, gas G is dry air pressurized to 0.7 MPa, and the angular frequency ω of the gas G is 660 [s ], which corresponds to the self-excited oscillation inside a thermoacoustic device with a total length of 1.74 [m]. -1 ], then the radius r [m] is 9.3 × 10 -4 [m] or more, 2.5×10 -3 In other words, the diameter of the hole 113 under these conditions is preferably within the range of about φ2 to φ5. In addition, the most suitable radius r [m] in this case is about 1.5×10 -3 [m], which corresponds to approximately φ3. When hole 113 is thin like this, it is difficult to process the inner surface of hole 113 into a smooth columnar shape.

[0037] Therefore, it is preferable that the multiple holes 113 have an inner surface smoothed by wire electric discharge machining. Wire electric discharge machining makes it possible to process the inner surface of the hole 113 into a smooth columnar shape even when the hole 113 is thin. This allows the hole 113 to be both a thin hole that effectively exerts the dream pipe effect and to have a smooth columnar inner surface that does not substantially inhibit the vibration of the gas G.

[0038] The surface roughness of the inner surface of the hole 113, in terms of the arithmetic mean roughness Ra according to JIS B 0601:2013, is preferably within the range of 0.1 to 10. This allows the hole 113 to have a smooth columnar inner surface that does not substantially impede the vibration of the gas G.

[0039] The main body 11 is shaped to have a plurality of slits 118 through which the liquid is introduced. The slits 118 are linearly provided between the plurality of rows described above from one end side (e.g., the first side surface 114) of the row (row formed by the holes 113) in the main body 11 to the other end side (e.g., the second side surface 115) of the row described above in the main body 11 so as not to intersect with the holes 113. As a result, the slits 118 exchange heat with the gas G via the main body 11. It is preferable that the slits 118 have a smooth inner surface in order to suppress pressure loss in the liquid to be introduced.

[0040] The height of the slit 118 is not particularly limited. In order to achieve both the structural strength around both bottom surfaces and the reduction of pressure loss for the liquid introduced into the slit, the height of the slit 118 is preferably within the range of, for example, 50% to 96% of the height of the main body 11. The width w [m] of the slit 118 is not particularly limited. In order to reduce pressure loss for the liquid introduced into the slit, the width w [m] is preferably 50% to 96% of d.

[0041] For example, if the radius r [m] is 4.4 × 10 -4 [m], and the column spacing d [m] is 1×10 -3 [m], the width w [m] of the preferred slit 118 is 5×10-4 [m] or more, 9.6×10 -4 In the case where the slit 118 is thus thin, it is difficult to process the inner surface of the slit 118 smoothly.

[0042] Therefore, it is preferable that the slit 118 has an inner surface smoothed by wire electric discharge machining. Wire electric discharge machining makes it possible to process the inner surface of the slit 118 into a smooth columnar shape even when the slit 118 is thin. This allows the slit 118 to be both thin to achieve a high aperture ratio and have a smooth inner surface with low pressure loss.

[0043] The surface roughness of the inner surface of the slit 118 is preferably in the range of 0.1 to 10 in terms of arithmetic mean roughness Ra according to JIS B 0601:2013. This makes the slit 118 a smooth inner surface with low pressure loss. For the same reason, the surface roughness of the inner surface of the slit 118 is preferably in the range of 0.1 to 20 in terms of maximum height roughness Ry according to JIS B 0601:2013.

[0044] [Shell 2] Fig. 1 is an isometric view of the gas-liquid heat exchanger E of the present embodiment. Fig. 6 is a front view of the gas-liquid heat exchanger E of Fig. 1. The following is an example of a preferred embodiment of the shell 2 using Figs. 1 and 6.

[0045] The shell 2 is a hollow member that houses the gas-liquid heat exchanger member 1. The shell 2 has at least a body portion 21. The shell 2 preferably further has a flange 22 to facilitate attachment to a thermoacoustic device T or the like. The shell 2 is configured to house the gas-liquid heat exchanger member 1 without blocking at least some of the multiple holes 113 on both one bottom surface (e.g., first bottom surface 111) and the other bottom surface (e.g., second bottom surface 112) of the main body portion 11 of the gas-liquid heat exchanger member 1.

[0046] The shell 2 is configured so as not to block at least a portion of the slits 118 on both one end side (e.g., the side of the first side surface 114) of the above-mentioned row in the main body portion 11 in which the slits 118 are provided and the other end side (e.g., the side of the second side surface 115) of the above-mentioned row.

[0047] 1 and 6, a pair of first openings 211 communicating between the inside and outside of the shell 2 is provided on the first side surface 114 side, and further, another pair of openings (not shown) communicating between the inside and outside of the shell 2 is provided on the second side surface 115 side, and a gap is provided between the inner surface of the hollow part of the shell 2 and the gas-liquid heat exchanger member 1, thereby realizing a configuration in which at least a part of the slits 118 is not blocked. That is, in the shell 2, at least a part of the multiple openings is provided on the same side as one end side of the above-mentioned row (e.g., the first side surface 114 side) as viewed from the center of the gas-liquid heat exchanger member 1 to be accommodated, and at least a part of the multiple openings is provided on the same side as the other end side of the above-mentioned row (e.g., the second side surface 115 side) as viewed from the center of the gas-liquid heat exchanger member 1.

[0048] To ensure the flow rate of the liquid, the shell 2 may have other openings, exemplified by the second opening 212, the third opening 213, the fourth opening 214, etc. The number and size of the openings are not particularly limited.

[0049] In order to facilitate the accommodation of the gas-liquid heat exchanger member 1, the body 21 of the shell 2 is preferably configured as a pair of separable members. In this case, the pair of members is preferably configured to be separable on a plane approximately perpendicular to the first direction D1. This makes it possible to apply a force in a direction along the first direction D1 and prevent liquid leakage from the separation surface. In order to facilitate the application of a force in a direction along the first direction D1 by a bolt or the like, the flange 22 preferably has a bolt hole 221. In order to prevent liquid leakage, the flange 22 is preferably configured integrally with the body 21.

[0050] <Manufacturing method of gas-liquid heat exchanger E> Fig. 7 is a flow chart showing an example of a preferred flow of the method for manufacturing the gas-liquid heat exchanger E according to this embodiment. The following describes an example of a preferred flow of the method for manufacturing the gas-liquid heat exchanger E according to this embodiment, using Fig. 7.

[0051] The method for producing the gas-liquid heat exchanger E preferably includes a shell preparation step, a gas-liquid heat exchanger member production step, and a housing step. The housing step is performed after the shell preparation step and the gas-liquid heat exchanger member production step.

[0052] [Shell preparation process] The shell preparation step is a step of preparing the shell 2. The shell preparation step is not particularly limited and may be any of the steps of preparing a hollow shell in the prior art. The procedure for providing the flange 22 is not particularly limited and may be any of the procedures in the prior art. The procedure for providing the first opening 211 and other openings is not particularly limited and may be any of the procedures in the prior art. The procedure for providing the bolt holes 221 is not particularly limited and may be any of the procedures in the prior art.

[0053] [Gas-liquid heat exchanger component manufacturing process] The manufacturing process for the gas-liquid heat exchanger member preferably includes an opening step and a smoothing step. The smoothing step is carried out after the opening step.

[0054] [Opening process] The opening step is a step of opening a plurality of holes 113 that linearly communicate from one bottom surface to the other bottom surface, and slits 118 that do not intersect with the holes 113, in a roughly cylindrical body material having one bottom surface (e.g., first bottom surface 111) and another bottom surface (e.g., second bottom surface 112) that are roughly parallel to each other. From the viewpoints of strength and preventing liquid from leaking into the holes 113, it is preferable that the body material be manufactured by cutting or the like from a homogeneous lump.

[0055] The material for the main body is not particularly limited, and may be various metals such as stainless steel, aluminum, copper, brass, etc., graphite carbon, etc. The material for the main body is preferably a material with relatively high thermal conductivity such as aluminum, copper, brass, etc. When the material is a thermally anisotropic material such as graphite carbon, it is preferable that the direction of low thermal conductivity is approximately the same as the direction from one bottom surface to the other bottom surface.

[0056] In the opening step, the multiple holes 113 are opened so as to be approximately parallel to the height direction (e.g., first direction D1) of the main body 11 and to form multiple rows along a predetermined direction (e.g., second direction D2) that is approximately perpendicular to the height direction, through which gas G is introduced. The "height direction" referred to here refers to the direction approximately parallel to the height direction of the column, that is, the direction from one bottom surface to the other bottom surface. The procedure for opening the holes 113 is not particularly limited and may be a procedure of the conventional technology.

[0057] In the opening step, the slits 118 are opened linearly between the above-mentioned multiple rows from one end side (e.g., the first side surface 114 side) of the above-mentioned rows in the main body portion 11 to the other end side (e.g., the second side surface 115 side) of the above-mentioned rows in the main body portion 11 so as not to intersect with the holes 113. The procedure for opening the slits 118 is not particularly limited and may be a procedure of the conventional technology.

[0058] [Smoothing process] The smoothing step is a step of smoothing the inner surface of the hole 113. The procedure of smoothing the inner surface of the hole 113 preferably includes a procedure using wire electric discharge machining. For example, this procedure is performed by passing a wire along the first direction D1 through the inside of the hole 113 opened in the opening step, and smoothing the inner surface of the hole 113 by electric discharge.

[0059] The smoothing step preferably includes a procedure for smoothing the inner surface of the slit 118. The procedure for smoothing the inner surface of the slit 118 preferably includes a procedure using wire electric discharge machining. This procedure is performed, for example, by passing a wire along the second direction D2 through the inside of the slit 118 opened in the opening step, and smoothing the inner surface of the slit 118 by electric discharge.

[0060] The manufacturing method for the gas-liquid heat exchanger member 1 of this embodiment makes it possible to provide the gas-liquid heat exchanger member 1 of this embodiment even when the multiple holes 113 are configured to be thin so as to effectively exert the dream pipe effect, by a procedure of smoothing the insides of the holes 113, which are pilot holes opened in the opening process, by wire electric discharge machining or the like.

[0061] [Containing process] The accommodating step is a step of accommodating the gas-liquid heat exchanger member 1 prepared through the opening step and the smoothing step inside the shell 2 prepared in the shell preparation step. The accommodating step is performed so that the shell 2 does not block at least a part of the holes 113 on both one bottom surface (e.g., the first bottom surface 111) and the other bottom surface (e.g., the second bottom surface 112) of the main body part 11, and does not block at least a part of the slits 118 on both one end side (e.g., the first side surface 114 side) of the above-mentioned row in the main body part 11 and the other end side (e.g., the second side surface 115 side) of the above-mentioned row.

[0062] The accommodating step preferably includes a procedure of accommodating the gas-liquid heat exchanger member 1 inside a pair of shells 2 that can be separated, and then fastening the shells by inserting bolts or the like into the bolt holes 221 that face each other between the pair of shells. This allows the bolts to apply a force in the first direction D1, preventing liquid leakage from the separation surface.

[0063] [Additional Notes on Effects of the Present Embodiment] For general-purpose heat exchangers, in order to increase the heat transfer area or the like, it is possible to select a parallel-flow microchannel heat exchanger in which multiple plates are prepared in which pores connecting the cross sections of the plates are arranged along the longitudinal direction of the cross sections, and these plates are divided into plates through which a cooling medium passes and plates through which a cooled medium passes, and the plates through which a cooling medium passes and the plates through which a cooled medium passes are alternately stacked.

[0064] On the other hand, when a parallel-flow microchannel heat exchanger configured as described above is used to cool a working fluid in which an oscillating flow occurs in a device intended to generate and utilize an oscillating flow, such as a thermoacoustic device, the aperture ratio for the working fluid is low. This is because the plate through which the cooled medium passes occupies only about half of the cross section, and only a part of the plate with pores passes through the working fluid. Therefore, the parallel-flow microchannel heat exchanger configured as described above hinders the oscillating flow in the device due to its low aperture ratio.

[0065] In addition, in a parallel flow microchannel heat exchanger, since the cooling medium passes through the pores, there is a concern that the pressure loss associated with the cooling medium will be large. If the device is intended to improve energy saving, it is contrary to the purpose to pump the cooling medium by consuming a lot of energy using a pump or the like that can handle a large pressure loss. Furthermore, in the parallel flow microchannel heat exchanger configured as described above, there is a concern that the bonding between the plates will deteriorate due to vibrations caused by the oscillating flow.

[0066] As described above, the manufacturing method of this embodiment involves drilling pilot holes and slits in the material for the main body, which has an approximately cylindrical shape, and smoothing the inner surfaces of the pilot holes, etc. by wire electric discharge machining, thereby providing hole 113 through which the oscillating gas G is introduced and slit 118 through which the cooling liquid is introduced, so that they are approximately perpendicular to each other.

[0067] This allows the gas-liquid heat exchanger member 1 of this embodiment to have a high aperture ratio for the oscillating gas G, which is the working fluid. Also, in the gas-liquid heat exchanger member 1 of this embodiment, the portion through which the cooling liquid is introduced is the slit 118, not the pores provided inside the plate, and therefore the pressure loss associated with the cooling liquid can be reduced. In addition, the gas-liquid heat exchanger member 1 of this embodiment is manufactured by a manufacturing method that does not include a procedure for joining plates, and therefore is free from damage caused by deterioration of the joining between the plates due to the oscillating flow in the gas.

[0068] As described above, the gas-liquid heat exchanger member 1 and its manufacturing method of the present embodiment can provide the gas-liquid heat exchanger E suitable for heat transport using thermoacoustic self-excited vibration.

[0069] <Application to thermoacoustic device T> 8 is a schematic diagram of a thermoacoustic device T to which the gas-liquid heat exchanger E of this embodiment is attached. The application of the gas-liquid heat exchanger E of this embodiment to the thermoacoustic device T will be described below with reference to FIG.

[0070] The gas-liquid heat exchanger E can be used as a low-temperature side heat exchanger of a thermoacoustic device T. The thermoacoustic device T is a heat transport device in which a heat accumulator S is disposed inside a tube P in which a gas G is sealed. The heat accumulator S is sandwiched between a low-temperature side heat exchanger and a high-temperature side heat exchanger H. This generates a temperature difference between both ends of the heat accumulator S, and a self-excited vibration of a thermoacoustic phenomenon is generated in the gas G. By this self-excited vibration, the thermoacoustic device T transports heat from the high-temperature side heat exchanger H disposed on the side of the high-temperature side end PE1 of the tube P to the low-temperature side heat exchanger disposed on the side of the low-temperature side end PE2 of the tube P.

[0071] The gas G is, for example, dry air, moist air, nitrogen gas, carbon dioxide gas, etc. By installing the gas-liquid heat exchanger E of this embodiment as the low-temperature side heat exchanger, the thermoacoustic device T reduces the formation of turbulent flow in the low-temperature side heat exchanger and favorably generates an oscillating flow due to self-excited vibration. As a result, the thermoacoustic device T has a higher heat transport capacity than when another low-temperature side heat exchanger is installed.

[0072] When the gas-liquid heat exchanger E of this embodiment is attached to a straight-tube thermoacoustic device T, it is preferable that the gas-liquid heat exchanger E is adjacent to the heat accumulator S. Here, "adjacent" means that the distance s from the end of the heat accumulator S on the low-temperature side end PE2 side to the end of the gas-liquid heat exchanger E on the high-temperature side end PE1 side is within the range of r / 5 or more and 4r or less.

[0073] In this case, the lower limit of the distance x from the end of the gas-liquid heat exchanger E on the side of the high-temperature end PE1 to the high-temperature end PE1 of the pipe line provided inside the pipe P is preferably 3 / 25L or more, and more preferably 5 / 25L or more. The upper limit of the distance x is preferably 10 / 25L or less, and more preferably 9 / 25L or less, where L is the length of the pipe line provided inside the pipe P. This makes it possible to arrange the gas-liquid heat exchanger E so that the above-mentioned distance s falls within the above-mentioned range when the heat accumulator S is arranged in a position where it can suitably generate self-excited vibration.

[0074] [Applicable subjects of gas-liquid heat exchanger E] The above describes the case where the gas-liquid heat exchanger E of this embodiment is attached to a thermoacoustic device T, but the application of the gas-liquid heat exchanger E of this embodiment is not limited to the thermoacoustic device T. The gas-liquid heat exchanger E of this embodiment is expected to exhibit the above-mentioned preferable effects in heat exchange with any fluid having an oscillating flow. Examples of application that satisfy such conditions include a thermoacoustic engine, a dream pipe, and a thermoacoustic refrigerator.

[0075] It should be noted that within the concept of the present invention, a person skilled in the art may come up with various modifications and alterations. It is understood that such modifications and alterations are within the scope of the present invention. For example, those in which a person skilled in the art appropriately adds, deletes, or modifies the design of the above-mentioned embodiment, or adds, omits, or modifies the conditions of a process, are also included in the scope of the present invention as long as they include the gist of the present invention. [Explanation of symbols]

[0076] T Thermoacoustic Device S heat storage P tube PE1 High temperature side end PE2 Low temperature side end H High temperature side heat exchanger E Gas-liquid heat exchanger 1. Gas-liquid heat exchanger components 11 Main body 111 1st bottom 112 2nd bottom surface 113 holes 114 First aspect 115 Second aspect 116 Third aspect 117 Fourth aspect 118 Slit 2. Shell 21 Torso 211 First Opening 212 Second Opening 213 Third Opening 214 4th Opening 22 Flange 221 Bolt hole D1 1st direction D2 2nd Orientation G Gas

Claims

1. A main body portion in which heat exchange occurs between a gas introduced therein and a liquid introduced therein, The shape of the main body is a generally columnar shape having one bottom surface and another bottom surface that are generally parallel to each other, and is provided with a plurality of holes that linearly communicate from the one bottom surface to the other bottom surface; The plurality of holes are provided so as to introduce the gas, are arranged substantially parallel to a height direction of the main body, and are arranged in a plurality of rows along a predetermined direction substantially perpendicular to the height direction; the shape of the inner surface of the hole is a smooth columnar shape that does not substantially impede the vibration of the gas when the gas is introduced into the hole; the main body has a shape provided with a plurality of slits through which the liquid is introduced, The slit is provided linearly between the plurality of rows from one end side of the row in the main body portion to the other end side of the row in the main body portion so as not to intersect with the holes. A component for gas-liquid heat exchangers for heat transport using thermoacoustic self-excited vibrations.

2. The gas-liquid heat exchanger member according to claim 1, a hollow shell that houses the gas-liquid heat exchanger member; Equipped with Gas-liquid heat exchanger for heat transport using thermoacoustic self-excited vibrations.

3. an opening step of opening a plurality of holes linearly communicating from one bottom surface to the other bottom surface and a slit not intersecting with the holes in a substantially cylindrical body material having one bottom surface and another bottom surface substantially parallel to each other; a smoothing step of smoothing the inner surface of the hole; Including, In the opening step, The plurality of holes are formed substantially parallel to a height direction of the main body portion and are formed in a plurality of rows along a predetermined direction substantially perpendicular to the height direction, The slits are formed linearly between the rows from one end side of the rows in the main body portion to the other end side of the rows in the main body portion so as not to intersect with the holes. A method for manufacturing a component for a gas-liquid heat exchanger for heat transport using thermoacoustic self-excited vibration.

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