JPH10288477A - Heat-exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To relax concentration of thermal stress at an edge member. SOLUTION: In a primary surface heat-exchanger where cold gas channels 24 and hot gas channels 25 are formed alternately by laminating waving primary surface plates 12 for cold gas and waving primary surface plates 20 for hot gas between edge members 34, 35 through an edge member 36, a groove 37 extending in the longitudinal direction of the edge member 36 is formed on the outer surface side of the edge member 36.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger, and more particularly, to a heat exchanger capable of reducing concentration of thermal stress on an edge material.

[0002]

2. Description of the Related Art Primary surface heat exchangers (primary surface heat exchangers) which can be made smaller and have higher performance than plate fin type heat exchangers and are suitable for use with internal combustion engines such as gas turbines. A heat exchanger, called, has been developed.

The heat exchanger is as shown in FIGS.

That is, as shown in FIGS. 4 to 6, peaks 1 and valleys 2 appear alternately in the left-right direction 3 and peaks 1 and valleys 2 extending in the vertical direction 4 meander to the left and right. A large number of two types of vertical thin corrugated plates 5 and 6 having a pattern are provided.

[0005] Then, as shown in FIG.
A pair of triangular air inlet corrugated portions 9 forming inclined air inlet channels 8 for inflow of air 7 (cold gas) from both left and right sides are attached to the upper side of the corrugated plate 5. On the lower side, a pair of triangular air outlet corrugated plates 11 forming inclined air outlet channels 10 for collecting and extracting the air 7 at the center are attached.
The primary surface plate 12 for air is constituted.

Reference numeral 13 denotes an air inlet duct attached to an inlet portion of the air inlet channel 8, and 14 denotes an air outlet duct attached to an outlet portion of the air outlet channel 10.

As shown in FIG. 5, a pair of triangular gases are formed on the upper side of the other corrugated plate 6 to form gas outlet flow paths 16 for letting gas 15 (hot gas) escape upward. An outlet corrugated plate portion 17 is attached, and a pair of triangular gas inlet corrugated plate portions 19 forming a gas inlet passage 18 for receiving the gas 15 from substantially below are attached to the lower side of the corrugated plate 6. , The primary surface plate 20 for gas.

Further, the air primary surface plate 12 and the gas primary surface plate 20 are stacked in multiple stages in the front-rear direction 21 and between the edges of the air primary surface plate 12 and the gas primary surface plate 20. By welding and fixing between the primary surface plate 12 for air, the primary surface plate 20 for gas, and the peripheral member 22 (welded portion 23) with the peripheral member 22 interposed therebetween, the air flow path 24 and the gas flow path are respectively provided inside. A heat exchanger 26 as shown in FIG.

The edge member 22 is provided so as to exclude the inlet portion of the air inlet channel 8 and the gas inlet channel 18 and the outlet portion of the air outlet channel 10 and the gas outlet channel 16. I do.

[0010] As shown in FIG.
Exhaust gas duct section 28 of an internal combustion engine such as gas turbine 27
On the way, the gas 15 is arranged to pass through the gas flow path 25,
The air outlet pipe 30 of the air compressor section 29 of the gas turbine 27 is connected to the air inlet duct 13 attached to the air inlet passage 8, and the air outlet duct 14 attached to the air outlet passage 10 is connected to the gas turbine 27. Connected to the air inlet pipe 31 of the turbine section.

Reference numeral 32 denotes an air intake port in the air compressor section 29 of the gas turbine 27.

According to this configuration, when the gas turbine 27 is driven and the air compressor section 29 is turned, the air 7
The (cold gas) is drawn into the air compressor section 29 from the air suction port 32 and compressed inside the air compressor section 29, and the compressed air 7 is then heated from the air outlet pipe 30 through the air inlet duct 13. Sent to exchanger 26,
The air passes through the heat exchanger 26 in the order of the air inlet channel 8, the air channel 24, and the air outlet channel 10, and is sent from the air outlet duct 14 to the turbine section of the gas turbine 27 via the air inlet pipe 31. , Used for fuel combustion in the turbine section.

The high-temperature gas 15 (hot gas) such as exhaust gas generated by fuel combustion in the turbine section is discharged to an exhaust gas duct section 28, and flows inside the heat exchanger 26 on the way to a gas inlet flow. The air 7 is heated in the passage 18, the gas flow path 25, and the gas outlet flow path 16 in the order of the air 7 so that the air 7 is heated. It is cooled down and then discharged.

The heat exchanger 26 is provided with an air 7 and a gas 15 separated only by an extremely thin corrugated primary surface plate 12 for air and a primary surface plate 20 for gas.
, A large heat transfer area can be ensured structurally, and a higher heat exchange efficiency can be obtained as compared with a plate-fin type heat exchanger.

In addition, since the structure is simple, the size can be reduced as compared with the plate fin type heat exchanger.

The above description is made by way of example with the gas turbine 27.
Although the description has been made of the case where
The heat exchange that can be performed is not limited to only between the air 7 and the exhaust gas 15.

[0017]

However, the above heat exchanger has the following problems.

That is, the heat exchanger is formed by laminating a thin corrugated primary surface plate 12 for air and a primary surface plate 20 for gas through an edge member 22 between edges, so that the heat transfer is wide. While a high heat transfer performance can be obtained by securing a heat area, the temperature of the whole becomes high and thermal deformation easily occurs. In particular, thermal stress tends to concentrate on the edge member 22 due to the thermal deformation.

The present invention has been made in view of the above circumstances, and has as its object to provide a heat exchanger that can reduce the concentration of thermal stress on edge materials.

[0020]

According to the present invention, a corrugated primary surface plate for cold gas 12 and a primary surface plate for hot gas 20 are laminated between edges 34 and 35 with an edge material 36 interposed therebetween. The cold gas flow path 2 inside
4 and the heat gas flow path 25 are alternately formed, a groove 37 extending in the longitudinal direction of the edge material 36 is formed in an outer surface portion of the edge material 36, and a groove 37 is formed in an outer surface portion of the edge material 36. Lumber 3
6. A heat exchanger according to claim 6, wherein a groove 37 extending in the longitudinal direction is formed.

According to the above means, the following effects can be obtained.

The heat exchanger is formed by laminating a corrugated primary surface plate for cold gas 12 and a primary surface plate for hot gas 20 with edge members 36 interposed between the edges 34, 35, so that the heat exchanger is wide. Although the heat transfer area is ensured and high heat transfer performance can be obtained, the whole becomes high temperature and easily causes thermal deformation. In particular, thermal stress tends to concentrate on the edge member 36 due to the thermal deformation. In the present embodiment, a groove 37 extending in the longitudinal direction of the edge member 36 is formed in a portion on the outer surface side of the edge member 36 so that the edge member 36 has a U-shaped cross section. The arm portions 39 of the 36 can be deformed.

As described above, the deformation of the edge member 36 can reduce the concentration of thermal stress on the edge member 36.

Further, the edge material 36 is provided on the outer surface side of the edge material 36.
By forming the groove 37 extending in the longitudinal direction and forming the edge member 36 into a U-shaped cross section, it is possible to reduce the overall weight.

[0025]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of the embodiment of the present invention. The basic structure of the heat exchanger is the same as that of FIGS. 2 to 6, and the same parts are denoted by the same reference numerals. Thus, the description is omitted.

In the present invention, the edge of the edge material 36 provided between the edge 34 of the primary surface plate 12 for air and the edge 35 of the primary surface plate 20 for gas is disposed in the longitudinal direction of the edge 36. Is formed, and the edge material 36 has a U-shaped cross section.

Reference numeral 38 denotes a welded portion between the edge portion 34 of the primary surface plate 12 for air and the edge portion 35 of the primary surface plate 20 for gas, and the arm portions 39 of two edge members 36 which are in contact with the edge portion 34. .

Next, the operation will be described.

The process in which the heat exchanger performs heat exchange is the same as in the case of FIGS.

Since the heat exchanger is formed by laminating a thin corrugated primary surface plate 12 for air and a primary surface plate 20 for gas through edges 36 and 35 between edges 34 and 35, the heat exchanger is wide. Although the heat area is secured and high heat transfer performance can be obtained, the whole becomes high temperature and easily causes thermal deformation. In particular, thermal stress is easily concentrated on the edge material 36 due to the thermal deformation. A groove 37 extending in the longitudinal direction of the edge material 36 is formed in a portion on the outer surface side of the edge material 36 so that the edge material 36 has a U-shaped cross section. Can be deformed as shown by a virtual line in FIG.

As described above, the deformation of the edge member 36 can reduce the concentration of thermal stress on the edge member 36.

Further, the edge material 36 is provided on the outer surface side of the edge material 36.
By forming the groove 37 extending in the longitudinal direction and forming the edge member 36 into a U-shaped cross section, it is possible to reduce the overall weight.

It should be noted that the present invention is not limited to the above-described embodiment, and the groove 37 formed in the edge member 36 is
It is needless to say that the shape is not limited to a rectangular shape but may be an arbitrary shape such as a semicircle shape, and that various changes can be made without departing from the scope of the present invention.

[0035]

As described above, according to the heat exchanger of the present invention, it is possible to alleviate the concentration of thermal stress on the edge material and to reduce the overall weight. The effect can be obtained.

[Brief description of the drawings]

FIG. 1 is a partially enlarged view similar to FIG. 6 according to an example of an embodiment of the present invention.

FIG. 2 is a perspective view showing a state where the heat exchanger is attached to a gas turbine.

FIG. 3 is an overall schematic perspective view of a heat exchanger.

FIG. 4 is a side view of a primary surface plate for air.

FIG. 5 is a side view of a gas primary surface plate.

FIG. 6 is a view taken in the direction of arrows VI-VI in FIGS. 4 and 5;

[Explanation of symbols]

12 Primary surface plate for cold gas (Primary surface plate for air) 20 Primary surface plate for hot gas (Primary surface plate for gas) 24 Cold gas flow path (Air flow path) 25 Hot gas flow path (Gas flow path) 34, 35 Edge 36 Edge material 37 Groove

Claims (1)

[Claims] 1. A corrugated primary surface plate for cold gas (12) and a primary surface plate for hot gas (20) are laminated between edges (34) and (35) via an edge material (36). By doing so, the cold gas flow path (24)
And a heat gas flow path (25) formed alternately, wherein a groove (37) extending in the longitudinal direction of the edge material (36) is formed in a portion on the outer surface side of the edge material (36). And heat exchanger.