JP2001183031A - Heat exchanger, absorption refrigerating machine, and cogeneration system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply cancel noises being generated when various kinds of exhaust gases are set to the heat transfer medium of a heat exchanger at low costs. SOLUTION: In a cogeneration system CGS, a generation unit 1 is combined with an absorption refrigerating machine 10. The absorption refrigerating machine 10 has a high-pressure regenerator 40 that uses an exhaust gas EG being discharged form a gas engine 3 of the generation unit 1 as a heat source for heating absorption solution Y of the inside. The high-pressure regenerator 40 has a heat transfer pipe 41 that circulates the exhaust gas EG from the generation unit 1, a shell SL4 where the heat transfer pipe 41 is arranged inside and at the same time the absorption solution Y is stored, and acoustic materials 47a, 47b, and 47c that are arranged in the shell SL4 while they come into contact with the heat transfer pipe 41.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a heat exchanger, an absorption refrigerator having a high-pressure regenerator functioning as a heat exchanger, and a cogeneration system having such an absorption refrigerator.

[0002]

2. Description of the Related Art Conventionally, as a technique belonging to such a field, a technique disclosed in Japanese Patent Application Laid-Open No. 8-296922 is known. The conventional absorption refrigerator described in this publication constitutes a cogeneration system together with a power generation unit including a power generator and a gas engine. This absorption refrigerator is a so-called double-effect absorption refrigerator, and has a high-pressure regenerator and a low-pressure regenerator as regenerators. The high-pressure regenerator uses exhaust gas discharged from the gas engine of the power generation unit as a heat source, and the low-pressure regenerator uses a cooling fluid (cooling water) that circulates around the gas engine of the power generation unit and recovers heat, and The refrigerant gas heated and vaporized by the regenerator is used as a heat source.

[0003]

Here, exhaust gas of a gas engine or the like used as a heat source of a high-pressure regenerator is intermittently discharged from the power generation unit at high temperature and high pressure. Therefore, unless some kind of silencing means is provided in the exhaust gas system, the noise generated by the system cannot be suppressed below a predetermined value. However, a general silencer conventionally used requires a relatively large installation space to reduce pressure loss. Further, in order to improve the heat recovery rate of the entire system, it is necessary to reduce the loss due to heat radiation in the muffler as much as possible.

Accordingly, an object of the present invention is to reduce noise generated when various exhaust gases are used as a heat transfer medium for a heat exchanger simply and at low cost. It is an object of the present invention to provide an exchanger, an absorption refrigerator equipped with a high-pressure regenerator functioning as such a heat exchanger, and a cogeneration system equipped with such an absorption refrigerator.

[0005]

According to a first aspect of the present invention, there is provided a heat exchanger for exchanging heat between various kinds of exhaust gas and a fluid to be transferred. The heat transfer tube is disposed inside, and a shell into which the fluid to be transferred is introduced, and a sound absorbing material disposed in the shell so as to contact the heat transfer tube are provided.

In this heat exchanger, exhaust gas discharged from a prime mover such as a gas engine, a gasoline engine, or a diesel engine is used as a heat source, and a heat transfer fluid at a temperature lower or higher than the exhaust gas is introduced into the shell to exchange heat. Things. In the shell, a sound absorbing material made of a porous material such as glass wool or rock wool is arranged so as to be in contact with the heat transfer tube. Accordingly, when the exhaust gas is caused to flow through the heat transfer tubes constituting the heat exchanger, sound waves superimposed on the exhaust gas are attenuated (absorbed) by the sound absorbing material through the tube walls of the heat transfer tubes. That is, this heat exchanger
As such, it functions as a silencer that consumes the acoustic energy of the exhaust gas.

Accordingly, the use of this heat exchanger eliminates the need for a silencing device such as a silencer, which has been required in the past, and reduces the noise generated when various exhaust gases are used as a heat transfer medium for the heat exchanger. It is possible to reduce the cost. Further, it is also possible to reduce the pressure loss and the heat loss caused by providing the silencing means.

[0008] The heat exchanger according to the second aspect of the present invention is a heat exchanger for performing heat exchange between various exhaust gases and a heat transfer target fluid, wherein: a heat transfer tube for flowing the heat transfer target fluid;
It is characterized by comprising a shell in which a heat transfer tube is disposed and into which exhaust gas is introduced, and a sound absorbing material disposed in the shell.

This heat exchanger uses exhaust gas discharged from a prime mover such as a gas engine, a gasoline engine, or a diesel engine as a heat source, and introduces a heat transfer fluid at a temperature lower or higher than the exhaust gas into a heat transfer tube to exchange heat. It is to let. And inside the shell, glass wool,
Sound absorbing material made of a porous material such as rock wool (for example,
(Such as a tube support plate). As a result, when the exhaust gas flows through the shell constituting the heat exchanger, the sound waves superimposed on the exhaust gas are attenuated (absorbed) by the sound absorbing material disposed in the shell. That is, the heat exchanger itself functions as a sound deadening unit that consumes the acoustic energy of the exhaust gas.

Therefore, the use of this heat exchanger eliminates the need for a silencing device such as a silencer, which was conventionally required, and reduces the noise generated when various exhaust gases are used as the heat transfer medium of the heat exchanger. It is possible to reduce the cost. Further, it is also possible to reduce the pressure loss and the heat loss caused by providing the silencing means.

According to a third aspect of the present invention, an absorption refrigerator according to the present invention is incorporated in a cogeneration system including a power generation unit, and separates an absorption solution and a refrigerant by using waste heat of the power generation unit, and condenses the refrigerant. After that, in an absorption refrigerator that evaporates to obtain cold heat, a high-pressure regenerator that heats the internal absorbing solution using exhaust gas discharged from the power generation unit as a heat source, and internal absorption using a cooling fluid flowing through the power generation unit as a heat source A low-pressure regenerator that heats the solution, the high-pressure regenerator has a heat transfer tube through which the exhaust gas or the absorption solution flows, a heat transfer tube disposed inside, and a shell through which the absorption solution or the exhaust gas flows, and a heat transfer tube. And a sound-absorbing material disposed in the shell so as to come into contact with the shell.

This absorption refrigerator constitutes a cogeneration system together with a power generation unit. A high-pressure regenerator included in the absorption refrigerator uses exhaust gas discharged from the power generation unit as a heat source and heat transfer pipes or shells. Heat the absorption solution. And in the shell of the high pressure regenerator,
A sound absorbing material made of a porous material such as glass wool or rock wool is arranged so as to be in contact with the heat transfer tube. Thereby, when the exhaust gas is allowed to flow through the shell or the heat transfer tube that constitutes the high-pressure regenerator, the sound waves superimposed on the exhaust gas pass through the tube wall of the heat transfer tube or directly, and are absorbed in the shell. Damped (absorbed) by the material. In other words, the high-pressure regenerator itself functions as a muffling unit that consumes the acoustic energy of the exhaust gas.

Therefore, by incorporating the absorption refrigerator having the high-pressure regenerator into the cogeneration system, the silencing means such as a silencer provided in the conventional absorption refrigerator becomes unnecessary, and the exhaust gas from the power generation unit is regenerated at high pressure. It is possible to reduce the noise generated when the heat source of the vessel is used simply and at low cost.

According to a fourth aspect of the present invention, there is provided a cogeneration system according to the present invention, wherein a power generation unit and an absorption refrigerator are combined, and the power generation unit generates electric power and uses the exhaust heat of the power generation unit with the absorption refrigerator. In the cogeneration system to separate the absorbing solution and the refrigerant and condense the refrigerant, and then vaporize to obtain cold heat,
The absorption refrigerator has a high-pressure regenerator that heats the internal absorption solution using exhaust gas discharged from the power generation unit as a heat source, and a low-pressure regenerator that heats the internal absorption solution using a cooling fluid flowing through the power generation unit as a heat source. The high-pressure regenerator has a heat transfer tube through which the exhaust gas or the absorbing solution flows, and the heat transfer tube is arranged inside the shell, and a shell through which the absorbing solution or the exhaust gas flows, and is arranged in the shell so as to contact the heat transfer tube. And a sound absorbing material.

The absorption refrigerator constituting this cogeneration system is provided with a high-pressure regenerator which itself also functions as a muffling means. Therefore, in this cogeneration system, the silencing means such as a silencer, which has been conventionally required, can be omitted, so that the cost, the occupied space, and the like of the entire system can be reduced.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a heat exchanger, an absorption refrigerator and a cogeneration system according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a perspective view showing a first embodiment of a cogeneration system (hereinafter referred to as "CGS") according to the present invention, and FIG. 2 is a system diagram of the cogeneration system shown in FIG. The cogeneration system CGS (hereinafter, simply referred to as “CGS”) shown in these drawings is configured by combining the power generation unit 1 and the absorption refrigerator 10 into a single unit.
It has a total length of about 2 m and a total width of about 2 m. This CGS
Is extremely compact and is suitable for use in private power generation and the like.

As shown in FIG. 2, the power generation unit 1 has a generator 2 and a gas engine 3 for driving the generator 2. A cooling jacket (not shown) is provided in the gas engine 3, and cooling water EW (cooling fluid) supplied from the cooling tower 4 via a cooling water line is circulated in the jacket. . The cooling water EW that cools the gas engine 3 as the prime mover that drives the generator 2 by flowing through the jacket portion as described above, together with the exhaust gas EG discharged from the gas engine 3 and the absorption refrigerator 10
Used as a heat source on the side. In addition, a diesel engine, a gasoline engine, a gas turbine, or the like can be applied as a prime mover that drives the generator 2, and a fuel cell can be applied as the power generation unit 1.

The absorption refrigerator 10 performs a refrigeration operation by an absorption cycle in which water is used as a refrigerant R and a lithium bromide solution or the like is used as an absorption solution Y. That is, the absorption refrigerator 10 includes the evaporator 20, the absorber 30, the high-pressure regenerator 40 and the low-pressure regenerator 50 as the regenerator, and the condenser 60, which constitute the absorption cycle. And
The low-temperature refrigerant liquid (water) RL condensed in the condenser 60 is vaporized in the evaporator 20 to perform a refrigeration operation.

As shown in FIG. 2, the evaporator 20 and the absorber 3
0 shares the same shell SL1 (high vacuum vessel). A heat transfer tube 21 is disposed in the evaporator 20, and the heat transfer tube 21 is provided with cold water W through a cold water inlet line L <b> 1.
1 is supplied. The cold water W1 flowing through the heat transfer tube 21 is discharged to the outside via the cold water outlet line L2. Heat transfer tube 21
, The coolant liquid RL is sprayed through the spray pipe 22, and the sprayed coolant liquid RL takes vaporization latent heat from the cold water W <b> 1 flowing through the heat transfer pipe 21 to be vaporized.

Thus, the cold water W1 flows into the heat transfer tube 21 at a temperature of, for example, 12 ° C., is cooled, and then is discharged at a temperature of, for example, 5 ° C. or 7 ° C. through the cold water outlet line L2. . The refrigerant gas (water vapor) RG vaporized by depriving the latent heat of vaporization from the cold water W1 flows into the absorber 30 side.
Further, the cold water W1 flowing out of the evaporator 20 is used for cooling of a building or the like, and the cold water W1 used for cooling or the like is heated to a temperature of, for example, 12 ° C., and is introduced into the evaporator 20 again. . The evaporator 20 is provided with a refrigerant pump (not shown). The refrigerant pump RL pumps the refrigerant liquid RL from the inside of the evaporator 20, and the pumped refrigerant liquid RL is connected to a refrigerant line (not shown). Spray tube 22
And is sprayed toward the heat transfer tube 21.

Similarly, the heat transfer tube 31 is also provided inside the absorber 30.
Is arranged. Cooling water W2 is supplied to the heat transfer tube 31 via a cooling water line L3, and the absorbing solution Y is sprayed to the heat transfer tube 31 via a spray tube 32.
Since the sprayed absorption solution Y absorbs the refrigerant gas RG flowing into the absorber 30 side, its concentration decreases, and the diluted absorption solution Y having the reduced concentration is collected at the bottom of the absorber 30. The heat generated in the absorber 30 is recovered by the cooling water W2 flowing in the heat transfer tube 21. The absorber 30 is provided with a solution pump (not shown), and the solution pump pumps up the absorbing solution Y from inside the absorber 30. The pumped absorption solution Y is sprayed toward the heat transfer tube 31 via a solution line (not shown) and the spray tube 32.

The absorbing solution Y collected at the bottom of the absorber 30
Is pumped by the solution pump PY and the low-temperature heat exchanger 7
0, solution line L4, high temperature heat exchanger 75, solution line L
5 to the high-pressure regenerator 40. The high-pressure regenerator 40 uses exhaust gas EG discharged from the gas engine 3 of the power generation unit 1 as a heat source. That is,
A heat transfer tube 41 is disposed inside the high-pressure regenerator 40. The heat transfer tube 41 has an exhaust gas E discharged from the gas engine 3 of the power generation unit 1 via an exhaust gas line L6.
G is supplied as a heat source. Further, the exhaust gas EG flowing through the heat transfer tube 41 is discharged out of the system via the exhaust gas line L7 and the duct 5. As a result, the absorption solution Y supplied to the high-pressure regenerator 40 exhaust gas EG via the heat transfer tube 41.
And the temperature rises by taking away the heat of the refrigerant R, so that a part of the absorbed refrigerant R is vaporized. As a result, the concentration of the absorbing solution Y in the high-pressure regenerator 40 increases.

The absorption solution Y heated to a high concentration by the high-pressure regenerator 40 is supplied to the solution line L8, the high-temperature heat exchanger 75,
Solution line L9, low temperature heat exchanger 70, solution line L10
Is supplied to the scatter tube 32 through the tub and is scattered toward the heat transfer tube 31 in the absorber 30. On the other hand, the refrigerant gas RG vaporized in the high-pressure regenerator 40 is supplied as a heat source to the low-pressure regenerator 50 via the refrigerant line L11. That is, the heat transfer tube 51 is disposed in the low-pressure regenerator 50, and the refrigerant line L11 is connected to a fluid inlet of the heat transfer tube 51.

The low-pressure regenerator 50 includes, in addition to the refrigerant gas RG vaporized in the high-pressure regenerator 40, the power generation unit 1
The cooling water EW that has cooled the gas engine 3 is also used as a heat source. That is, the heat transfer tube 52 is disposed in the low-pressure regenerator 50, and the cooling water EW flowing out of the jacket of the gas engine 3 is supplied to the fluid inlet of the heat transfer tube 52 via the cooling water line L12. Pumped by pump PW. The cooling water EW flowing through the heat transfer tube 51 is returned to the cooling tower 4 via the cooling water line L13, and is reused for cooling the gas engine 3.

On the other hand, the low-temperature heat exchanger 70 and the high-temperature heat exchanger 7
5 is branched from the solution line L4 downstream of the high-temperature heat exchanger 75, and the inside of the low-pressure regenerator 50 is connected to the absorber 3 via the solution line L14.
From 0 a dilute absorption solution Y is supplied. Low pressure regenerator 50
The absorption solution Y supplied to the inside of the heat sink takes heat from the high-temperature refrigerant gas RG through the heat transfer tube 51 and the cooling water EW heated through the heat transfer tube 52 to raise the temperature. Thereby, the refrigerant R dissolved in the absorbing solution Y is vaporized and the concentration of the absorbing solution Y is increased. The absorption solution Y having a high concentration is
It is collected at the bottom of the low-pressure regenerator 50 and flows out of the solution line L15. The solution line L15 is connected to the high-temperature heat exchanger 7
5 and the low-temperature heat exchanger 70, and as a result, the absorbing solution Y collected at the bottom of the low-pressure regenerator 50 flows into the solution line L15, the solution line L9, and the low-temperature heat exchanger 70. , Spraying pipe 32 through solution line L10
And is sprayed toward the heat transfer tube 31 in the absorber 30.

The refrigerant gas RG vaporized in the low-pressure regenerator 50
Is introduced into the condenser 60 via the refrigerant line L16. Similarly, the refrigerant gas RG that has passed through the low-pressure regenerator 50 as a heat source after being vaporized by the high-pressure regenerator 40 is introduced into the condenser 60 via the refrigerant line L17. A heat transfer tube 61 is disposed inside the condenser 60, and a fluid inlet of the heat transfer tube 61 has a cooling water line L <b> 1 connected to a fluid outlet of the heat transfer tube 31 disposed in the absorber 30.
Cooling water W2 is supplied via 8. Therefore, the condenser 6
The high-pressure refrigerant gas RG that has flowed into the coolant tube 0 is cooled and condensed through the heat transfer tube 61 to become a low-temperature refrigerant liquid (water) RL.
The refrigerant liquid RL is supplied to the distribution pipe 22 via the refrigerant line L19 due to a pressure difference and a gravity difference between the inside of the condenser 60 and the inside of the evaporator 20, and is dispersed to the heat transfer tube 21 in the evaporator 20. You. Note that the condenser 60 may be configured to share the same shell as the low-pressure regenerator 50.

Here, the exhaust gas EG of the power generation unit 1 (gas engine 3) used as a heat source of the high-pressure regenerator 40
Is intermittently discharged from the power generation unit 1 at high temperature and high pressure. Therefore, in order to reduce the noise of the entire CGS, it is necessary to provide some kind of silencing means in the exhaust gas system. In view of this point, the high-pressure regenerator 40 of the absorption refrigerator 10 incorporated in the CGS is configured so as to function as a muffling means itself.

As shown in FIG. 3, the high-pressure regenerator 40 has a shell SL4 formed in a duct shape. A pair of headers 42 and 44 are arranged in the shell SL4, and a plurality of heat transfer tubes 41 are arranged between the pair of headers 42 and 44 via a tube plate or the like (not shown). .
The exhaust gas line L6 described above is connected to the header 42 located on the right side in the drawing of the pair of headers 42 and 44,
Exhaust gas EG discharged from the gas engine 3 of the power generation unit 1 is supplied. Also, the header 4 located on the right side in the figure
4 is connected to the duct 5 via an exhaust gas line L7.

In the shell SL4, a plurality of pipe support plates 4 are provided at a predetermined interval between the header 42 and the header 44.
5 are arranged. Each tube support plate 45 has a heat transfer tube 41
The heat transfer tubes 41 are inserted into the hole portions of the tube support plate 45. Furthermore,
Inside the shell SL4, the absorbing solution Y from the absorber 30 is provided.
And a solution line L8 for returning the absorbing solution Y to the absorber 30 are connected so as to be substantially orthogonal to the extending direction of the heat transfer tube 41. in addition,
In the upper part of the shell SL4, there is a refrigerant gas RG generated inside.
Is connected to a low-pressure regenerator 50.

The sound absorbing material 47 a is arranged in the shell SL 4 of the high-pressure regenerator 40 so as to be in contact with each heat transfer tube 41. As shown in FIGS. 4 and 5, the sound absorbing material 47a is formed of a porous material such as glass wool or rock wool in a thin plate shape, and is provided on the surface of both sides of the tube supporting plate 45 (each of the headers 42 and 44). Affixed. In addition, the sound absorbing material 47a is also formed with a number of holes corresponding to the number of heat transfer tubes 41 provided, and each heat transfer tube 41 is inserted into the hole of the sound absorbing material 47a and the hole of the tube support plate 45. . Each heat transfer tube 41
It comes into contact with a hole formed in the sound absorbing material 47a.

Thus, when the exhaust gas EG flows through the heat transfer tubes 41 constituting the high-pressure regenerator 40, the sound waves superimposed on the exhaust gas EG are attenuated by the sound absorbing material 47a via the tube walls of the heat transfer tubes 41 ( Absorption). Further, in the high-pressure regenerator 40, the sound absorbing members 47b and 47c are also provided on the inner wall surface of the shell SL4 and the surfaces of the headers 42 and 44.
The sound wave that has passed through the tube wall of the heat transfer tube 41 is absorbed by these sound absorbing materials 47b and 47c.

As described above, the high-pressure regenerator 40 of the absorption refrigerator 10 constituting the CGS itself functions as a muffling means for consuming the acoustic energy of the exhaust gas EG.
Therefore, a silencing device such as a silencer provided in an absorption refrigerator incorporated in a cogeneration system is unnecessary, and noise generated when exhaust gas EG from the power generation unit 1 is used as a heat source of the high-pressure regenerator 40 can be reduced. And it becomes possible to reduce at low cost. Further, it is also possible to reduce the pressure loss and the heat loss due to the provision of the silencing means. Further, by configuring the high-pressure regenerator of the absorption refrigerator constituting the CGS so as to function also as a sound deadening means, it is possible to reduce the cost, the occupied space, and the like of the entire CGS.

In the high-pressure regenerator 40 described above, the exhaust gas EG (heat source) flows through the heat transfer tube 41 and the shell SL4
The description has been made assuming that the absorbing solution Y (the fluid to be heat-transferred) is circulated therein, but the present invention is not limited to this. That is, the absorbing solution Y (fluid to be transferred) may be caused to flow through the heat transfer tube 41, and the exhaust gas EG (heat source) may be caused to flow inside the shell SL4.

FIGS. 6 and 7 show the high-pressure regenerator 40 described above.
It is a side view which shows the other aspect of the heat transfer tube which can be arrange | positioned at. The heat transfer tube 41A shown in the figure is configured as a so-called horizontal type high fin tube, and has a plurality of heat transfer fins F arranged at predetermined intervals on the tube surface. The surface of the heat transfer tube 41 between the heat transfer fins F has a sound absorbing material 4 made of a porous material such as glass wool or rock wool.
7d is stuck. In such a horizontal finned tube, the heat transfer between the heat source fluid and the heat transfer target fluid is as follows:
Since it is performed exclusively through the heat transfer fins F,
Most of the surface of the heat transfer tube 41 can be covered with the sound absorbing material 47d. Thus, sound waves superimposed on the exhaust gas EG flowing in the heat transfer tube 41 can be efficiently absorbed. Further, such a configuration is also effective when the absorption solution Y as the heat transfer target fluid flows through the heat transfer tube 41.

In the above, the example in which the heat exchanger according to the present invention is applied as a high-pressure regenerator of an absorption refrigerator incorporated in a cogeneration system has been described. When heat exchange is performed between the above-described embodiments, the following embodiments can be used in addition to the above-described embodiments.

The heat exchanger 80 shown in FIG. 7 is configured as a so-called fin tube type heat exchanger, and includes a plurality of flat tubes 81 functioning as heat transfer tubes and each flat tube 81.
And a thin plate-shaped fin PF through which the fin is inserted. In this case, the sound absorbing material 87 is made of a porous material such as glass wool and rock wool, and is adhered to the outer peripheral surface of the flat tube 81 so as to avoid the mounting position of the plate fin PF.

When exhaust gas discharged from a prime mover or the like flows through each flat tube 81 of the heat exchanger 80 configured as described above, sound waves superimposed on the exhaust gas are absorbed through the tube wall of the flat tube 81. The material 87 is attenuated (absorbed). In addition, the heat transfer target fluid is allowed to flow through the flat tube 81,
Even when exhaust gas is further circulated around the flat tube 81,
The sound wave superimposed on the exhaust gas is absorbed by the sound absorbing material 87 mounted on the outer circumference of the flat tube 81. Therefore,
The heat exchanger 80 also makes it possible to easily and inexpensively reduce noise generated when various exhaust gases are used as a heat transfer medium, and to reduce pressure loss and heat loss due to the provision of the silencing means. Is also possible.

The heat exchanger 80A shown in FIG. 8 is configured as a so-called plate-fin type heat exchanger, and has a plurality of plate members 82 made of a metal such as aluminum, and is formed in a waveform. And a plurality of corrugated fins CF fixed between the respective plate members 82. In this case, a sound absorbing material 87 made of a porous material such as glass wool or rock wool is provided between the plate 82 and the corrugated fin CF. Further, as shown in FIG. 8, the plate member 82 may be omitted, and a sound absorbing material 87 may be provided between the corrugated fins CF.

Also in this heat exchanger 80A, the sound waves superimposed on the exhaust gas are absorbed by the sound absorbing material 87, so that the noise generated when various exhaust gases are used as the heat transfer medium can be reduced simply and at low cost. It is also possible to reduce pressure loss and heat loss associated with the provision of the muffling means.

Further, the heat exchanger 90 shown in FIG. 9 is configured as a so-called shell-and-tube heat exchanger, and various kinds of exhaust gas discharged from a prime mover such as a gas engine, a gasoline engine, and a diesel engine and a fluid to be transferred. And allows heat exchange between them.
The heat exchanger 90 includes a plurality of heat transfer tubes 91 through which a heat transfer target fluid flows, and a shell 92 in which each heat transfer tube 91 is disposed.
And The shell 92 has a heat source fluid inlet 92a and a heat source fluid outlet 92b, into which exhaust gas can be introduced from the heat source fluid inlet 92a. Shell 9
The exhaust gas flowing through the inside 2 is discharged from the heat source fluid outlet 92b. Further, a heat transfer target fluid inlet 92c and a heat transfer target fluid outlet 92d are provided at both ends in the longitudinal direction of the shell 92.
Are provided.

One end of each heat transfer tube 91 is connected to a fixed tube support plate 93 arranged on the side of the heat transfer target fluid inlet 92 c in the shell 92.
Supported by The other end of each heat transfer tube 91 is connected to a heat transfer target fluid inlet 92 arranged in the shell 92.
The supporting member 94 is supported by a fixed tube supporting plate 94 arranged at position d. Each of the fixed tube support plates 93 and 94 is formed of a porous material such as glass wool or rock wool, and functions as a sound absorbing material.

Further, inside the shell 92, tube support plates 95a, 95b, 95c, 95d for supporting the heat transfer tubes 91 are arranged. Each of the tube support plates 95a to 95d is also formed of a porous material such as glass wool or rock wool, and functions as a sound absorbing material. Each tube support plate 95a-95
Among d, the tube support plates 95a and 95c are fixed to the inner peripheral surface of the shell 92 at the upper side in the figure, and between the free end side located at the lower side in the figure and the inner peripheral surface of the shell 92. A space is defined. The tube support plates 95b and 95d are fixed to the inner peripheral surface of the shell 92 at the lower side in the figure, and there is a space between the free end side located at the upper side in the figure and the inner peripheral surface of the shell 92. Is defined. Accordingly, the inner peripheral surface, the fixed tube support plates 93 and 94, and the respective tube support plates 95a to 95 are provided in the shell 92.
d, the heat source fluid inlet 92a and the heat source fluid outlet 92
b is defined.

When the exhaust gas is introduced into the heat source fluid inlet 92 a of the heat exchanger 90 configured as described above, the exhaust gas flows through the exhaust gas passage defined in the shell 92 and is disposed in the shell 92. Fixed tube support plates 93, 94,
And, it comes into contact with each of the tube support plates 95a to 95d. As a result, the sound waves superimposed on the exhaust gas are transferred to the fixed pipe supporting plate 9 as a sound absorbing material disposed in the shell 92.
3, 94, and are attenuated (absorbed) by the tube support plates 95a to 95d. Therefore, even if this heat exchanger 90 is used, a silencing device such as a silencer, which has been conventionally required, becomes unnecessary. As a result, noise generated when various exhaust gases are used as a heat transfer medium for the heat exchanger can be reduced simply and at low cost, and pressure loss and heat loss associated with the provision of the silencing means can be reduced. It becomes possible. In addition,
Although omitted in the heat exchanger 90 shown in FIG. 9, a sound absorbing material made of a porous material such as glass wool or rock wool may be attached to the inner peripheral surface of the shell 92.

[0045]

Since the heat exchanger according to the present invention is configured as described above, the following effects can be obtained. That is, a sound absorbing material is arranged in a shell of a heat exchanger that enables heat exchange between various exhaust gases and a heat transfer target fluid, or a sound absorbing material is arranged in a shell so as to contact a heat transfer tube. Thus, noise generated when various exhaust gases are used as a heat transfer medium of the heat exchanger can be reduced simply and at low cost. Therefore, if such a heat exchanger is applied to a cogeneration system or an absorption refrigerator, noise generated when exhaust gas from a power generation unit is used as a heat source for a high-pressure regenerator can be reduced simply and at low cost. In addition, since silencing means such as a silencer, which is conventionally required, can be omitted, the cost, occupied space, and the like of the entire cogeneration system can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a cogeneration system according to the present invention.

FIG. 2 is a system diagram of the cogeneration system shown in FIG.

FIG. 3 is a perspective view showing a high-pressure regenerator provided in an absorption refrigerator constituting the cogeneration system shown in FIGS. 1 and 2;

FIG. 4 is an enlarged view showing a main part of the high-pressure regenerator shown in FIG.

FIG. 5 is a side view showing another embodiment of the heat transfer tube applicable to the high-pressure regenerator shown in FIG.

FIG. 6 is a sectional view taken along line VI-VI in FIG. 5;

FIG. 7 is a perspective view showing another embodiment of the heat exchanger according to the present invention.

FIG. 8 is a perspective view showing another embodiment of the heat exchanger according to the present invention.

FIG. 9 is a sectional view showing another embodiment of the heat exchanger according to the present invention.

[Explanation of symbols]

CGS: Cogeneration system, 1: Power generation unit, 2: Generator, 3: Gas engine, 5: Duct, 10
... absorption refrigerator, 20 ... evaporator, 21 ... heat transfer tube, 22 ... spray tube, 30 ... absorber, 31 ... heat transfer tube, 32 ... spray tube, 4
0: High pressure regenerator, 41, 41A: Heat transfer tube, 47a, 47
b, 47c, 47d, 87: sound absorbing material, 50: low pressure regenerator, 51: heat transfer tube, 52: heat transfer tube, 60: condenser, 61
... heat transfer tube, 70 ... low temperature heat exchanger, 75 ... high temperature heat exchanger,
80, 80A, 90: heat exchanger, 91: heat transfer tube, 92:
Shell, 92a: heat source fluid inlet, 92b: heat source fluid inlet, 92c: heat transfer target fluid inlet, 92d: heat transfer target fluid inlet, 93, 94: fixed tube support plate, 95a, 95b, 9
5c, 95d: pipe support plate, EG: exhaust gas, EW: cooling water (cooling fluid), F: heat transfer fin, CF: corrugated fin, PF: plate fin, R: refrigerant, RG: refrigerant gas, RL: refrigerant liquid , SL4 ... shell, Y ... absorption solution.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Makoto Fujiwara 2-1-1, Shinhama, Arai-machi, Takasago City, Hyogo Prefecture Inside the Takasago Research Laboratory, Mitsubishi Heavy Industries, Ltd. 1 Takasago Research Laboratory, Mitsubishi Heavy Industries, Ltd. (72) Inventor Masayoshi Toyofuku 2-1-1 Shinhama, Arai-machi, Takasago City, Hyogo Prefecture Inside the Takasago Research Laboratory, Mitsubishi Heavy Industries, Ltd. 2-1-1 Niihama, Takasago Research Laboratory, Mitsubishi Heavy Industries, Ltd. (72) Inventor Takayuki Irie 2-1-1, Niihama, Arai-machi, Takasago-shi, Hyogo F-term in Takasago Research Laboratory, Mitsubishi Heavy Industries, Ltd. 3L093 AA01 BB11 BB26 BB29 BB31 MM02 MM04 3L103 AA29 BB17 BB33 CC18 CC27 DD08 DD32 DD33

Claims (4)

[Claims] 1. A heat exchanger for exchanging heat between various kinds of exhaust gas and a heat transfer target fluid, wherein the heat transfer tube through which the exhaust gas flows and the heat transfer tube are disposed inside, and the heat transfer target fluid A heat exchanger comprising: a shell into which the heat transfer tube is introduced; and a sound absorbing material disposed in the shell so as to contact the heat transfer tube. 2. A heat exchanger for performing heat exchange between various kinds of exhaust gas and a heat transfer target fluid, wherein the heat transfer tube through which the heat transfer target fluid flows, the heat transfer tube is disposed inside, and the exhaust gas A heat exchanger, comprising: a shell into which is introduced; and a sound absorbing material arranged in the shell. 3. An absorption device that is incorporated in a cogeneration system including a power generation unit, separates an absorbing solution and a refrigerant by using exhaust heat of the power generation unit, condenses the refrigerant, and then vaporizes to obtain cold heat. In the refrigerator, a high-pressure regenerator that heats the internal absorption solution using the exhaust gas discharged from the power generation unit as a heat source, and a low-pressure regenerator that heats the internal absorption solution using the cooling fluid flowing through the power generation unit as a heat source The high-pressure regenerator has a heat transfer tube for flowing exhaust gas or an absorption solution, and the heat transfer tube is disposed inside the shell, and a shell for flowing the absorption solution or exhaust gas, and the heat transfer tube so as to contact the heat transfer tube. An absorption refrigerator comprising: a sound absorbing material disposed in a shell. 4. A power generation unit and an absorption refrigerator are combined, and the power generation unit generates electric power, and the absorption refrigerator uses an exhaust heat of the power generation unit to separate an absorption solution and a refrigerant. And, after condensing the refrigerant, in the cogeneration system to obtain cold heat by vaporizing, the absorption refrigerator, a high-pressure regenerator that heats the internal absorption solution using the exhaust gas discharged from the power generation unit as a heat source, A low-pressure regenerator that heats the absorbing solution inside using the cooling fluid flowing through the power generation unit as a heat source, wherein the high-pressure regenerator has a heat transfer tube through which exhaust gas or the absorbing solution flows, and the heat transfer tube disposed inside. And a shell through which the absorbing solution or the exhaust gas flows, and a sound absorbing material disposed in the shell so as to be in contact with the heat transfer tube. Generation system.