JP2866938B1 - Heat exchanger and cooling system using the same - Google Patents

Abstract

An improved heat exchanger having a sufficient regenerative function is provided. SOLUTION: A fuselage 4, a plurality of baffle plates 40 arranged in the fuselage 4 at intervals, a heat transfer tube 16 provided through the plurality of baffle plates 40, and a heat transfer tube 16 are provided. A heat exchanger comprising fin members 70 and 72 extending in the axial direction and disposed between adjacent baffle plates 40 so as to be in contact with the heat transfer tubes 16. The body 4 is provided with an inlet through which alcohol water flows in and an outlet 46 through which this alcohol water flows out,
The heat transfer tube 16 is supplied with liquefied natural gas that is heat-exchanged with the alcoholic water in the body 4, and the plurality of baffles 40 and the fin members 70, 72 are formed of the liquefied natural gas flowing through the heat transfer tube 16. It has a heat transfer function of transmitting cold heat to alcoholic water, and has a cold storage function due to the adhesion of ice to these.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger for cooling a refrigerant using a cold fluid and a cooling system using the same.

[0002]

2. Description of the Related Art As a refrigeration system utilizing refrigeration of liquefied natural gas (hereinafter abbreviated as "LNG") as a refrigeration fluid, there are a refrigerated warehouse and a frozen food business. The present applicant has filed Japanese Patent Application No. 8-15477 as a cooling and heating system applied to these businesses and a heat exchanger used in this system.
No. 9 was disclosed in the specification and drawings. The cooling system disclosed in the earlier application includes a heat exchanger, a regenerator, and a vaporizer. The heat exchanger has a body, and a substantially U-shaped heat transfer tube is disposed in the body, and LNG is supplied through the heat transfer tube. The body is filled with alcoholic water as a refrigerant, and cold heat from LNG flowing through the heat transfer tubes is exchanged with alcoholic water. The heat exchanger is connected via a regenerator to cold heat utilization equipment, for example, a freezer warehouse. The cold storage tank has two layers, a high-temperature layer and a low-temperature layer.
It has two temperature stratifications, and has a cool storage function using the temperature difference. The alcohol from the heat exchanger is supplied to the cold heat utilization facility through the lower layer of the regenerator, and the cold heat utilization facility is cooled to, for example, −35 ° C. using the cold heat of the alcohol water. Alcohol water from the cold heat utilization facility is returned to the heat exchanger through the upper layer of the regenerator, cooled again in this heat exchanger, and the above-described cooling cycle is repeatedly performed. On the other hand, LNG is vaporized while flowing through the heat exchanger, and the vaporized natural gas (for example, −60 to −35 ° C.)
Is heated to 0 ° C. or higher by the vaporizer and supplied to ordinary households and the like as city gas.

[0003]

However, the above proposed cooling and heating system and the heat exchanger used for the same have the following problems.
There are the following problems to be solved.

That is, in the above cooling and heating system,
Since a cold storage tank for storing cold heat and a vaporizer for raising the temperature of LNG to 0 ° C. or more are required, there is a problem that the size of the cooling system becomes large and the system becomes expensive.

[0005] It is also desired that the heat exchanger has a simplified structure in relation to the cooling / heating system.

It is a first object of the present invention to provide an improved heat exchanger having a sufficient heat transfer function and cold storage function.

A second object of the present invention is to provide a refrigeration system having a relatively simple structure, which can evaporate a cryogenic fluid to a predetermined temperature without providing a vaporizer.

[0008]

SUMMARY OF THE INVENTION The present invention is directed to a body extending in a predetermined direction and a plurality of baffles spaced apart in the predetermined direction to form a curved flow path in the body. And a heat transfer tube provided through the plurality of baffles,
A fin member extending in the axial direction of the heat transfer tube and disposed between the adjacent baffle plates so as to be in contact with the heat transfer tube, wherein the body has an inlet through which a refrigerant flows in and an outlet through which the refrigerant flows out. The heat transfer tube is provided with a cooling fluid that is heat-exchanged with the refrigerant in the fuselage, and the plurality of baffles and fin members reduce the cooling heat of the cooling fluid flowing through the heat transfer tube. A heat exchanger having a heat transfer function of transmitting heat to a refrigerant, and having a cold storage function by attaching ice thereto.

According to the present invention, a plurality of baffle plates are provided at predetermined intervals in the body, and a fin member extending in the axial direction of the heat transfer tube is provided between adjacent baffle plates. . Therefore, these baffle plates and fin members have not only a heat transfer function of transmitting cold heat from the cold fluid to the refrigerant, but also a cold storage function due to the adhesion of ice to them. By providing the fin members in this manner, a sufficient surface area for adhering ice is secured, and a sufficient cold storage function is exhibited.

In the present invention, the heat transfer tube is substantially U-shaped, and the plurality of baffles are provided with a pair of through holes through which the heat transfer tube is inserted. And a slit extending therefrom is provided, and the fin member is provided so as to pass through the slits of the plurality of baffle plates.

According to the present invention, the heat transfer tube is substantially U-shaped, and a fin member is provided so as to penetrate a plurality of baffle plates so as to contact a pair of straight portions of the heat transfer tube. With a simple structure, the surface area to which ice adheres can be increased, and the heat transfer effect and the cold storage effect can be improved.

[0012] In the present invention, the plurality of baffles may include:
A notch slit extending from the outside through the through hole is formed, an inner fin member is provided inside the heat transfer tube mounted through the through hole, and an outer fin member is provided outside the heat transfer tube. The fin member is provided so as to penetrate an inside portion of the cut slit of the plurality of baffle plates, and the outer fin member is provided so as to pass through the outside portion of the cut slit of the plurality of baffle plates. And

According to the present invention, an inner fin member is mounted so as to be in contact with the inside of the pair of straight portions of the heat transfer tube so as to penetrate the inside of the slit, and to be in contact with the outside of the straight portion. Since the outer fin member is mounted so as to penetrate the outside portion of the slit, the surface area to which ice adheres can be further increased, and the heat transfer effect and the cold storage effect can be further improved.

The present invention also includes a body extending in a predetermined direction and divided by a partition plate into first and second chambers, and a heat transfer tube extending through the first and second chambers. The first chamber is provided with a first inlet through which the refrigerant flows and a first outlet through which the refrigerant flows, and the second chamber of the body is provided with a second inlet through which the refrigerant flows. An inlet and a second outlet from which the refrigerant flows out are provided, and the heat transfer tube is supplied with a cooling fluid which is exchanged with the refrigerant in the body, and a first outlet of the first chamber is provided. And the first inlet is connected to a first cold heat utilization facility, and the refrigerant flowing out of the first outlet flows through the first cold heat utilization facility, and the refrigerant flows from the first inlet to the first cold utilization facility. Flows into the room,
The second outlet and the second inlet of the second chamber are the second outlet.
The refrigerant flowing out of the second outlet of the second chamber flows through the second cold utilization facility, and flows into the second chamber from the second inlet. ,
Cold heat flowing through the first chamber and the first cold heat utilization facility is set to a first temperature or higher, and cold heat flowing through the second chamber and the second cold heat utilization facility is higher than the first temperature. Is set to be lower than the second temperature, which is also low.

According to the present invention, the body is partitioned into the first chamber and the second chamber by the partition plate, the temperature of the refrigerant in the first chamber is set to be equal to or higher than the first temperature, and The temperature of the refrigerant in the chamber is set to a second temperature or lower that is lower than the first temperature.
The refrigerant in the first chamber is sent to the first cold utilization facility, and the refrigerant in the second chamber is sent to the second cold utilization facility. To cool each to a desired temperature.

Further, according to the present invention, the refrigerant in the first chamber and the refrigerant in the second chamber are the same refrigerant, and the first chamber and the second chamber are located between the body and the partition plate. A gap communicating with the second chamber is provided, and the first and / or second chamber is further provided with a pressure absorbing device for absorbing pressure fluctuation of the refrigerant.

According to the present invention, a communication gap for communicating the first and second chambers is provided between the body and the partition plate, and a pressure absorbing device for absorbing the pressure of the refrigerant is provided. Therefore, even if the pressure of the refrigerant in the first chamber and / or the refrigerant in the second chamber fluctuates, the pressure fluctuation of the refrigerant can be absorbed by the common pressure absorbing device.

Further, in the present invention, the cold fluid is liquefied natural gas, the refrigerant is alcoholic water, the temperature of alcoholic water flowing through the first chamber is 0 ° C. or more, The temperature of the alcohol water flowing through the chamber is not higher than -35 ° C.

According to the present invention, alcohol water is used as the refrigerant, the temperature of the alcohol water in the first chamber is set to 0 ° C. or higher, and the temperature of the second chamber is set to −35 ° C. or lower. When LNG is used as the cooling fluid, the LNG can be vaporized to a temperature of 0 ° C. or more while flowing through the heat transfer tube. Further, the refrigerant in the second chamber can be used for cooling a refrigerated warehouse or the like.

In the present invention, a plurality of first baffles are provided in the first chamber at intervals in the predetermined direction so as to form a bent first flow path. The first inflow port is disposed above a plurality of first baffle plates, the first outflow port is disposed below the plurality of first baffle plates, and the second In the chamber, a plurality of second baffles are provided at intervals in the predetermined direction to form a bent second flow path, and the plurality of second baffles are provided above the plurality of second baffles. A second inflow port is disposed, and the second outflow port is disposed below the plurality of second baffle plates.

According to the present invention, the first chamber is provided with a plurality of first baffles at intervals so as to form a bent first flow path. The heat transfer effect in the room can be enhanced. In the second room,
Since a plurality of second baffle plates are provided at intervals so as to form a bent second flow path, the heat transfer effect in the second chamber can be enhanced.

Further, the present invention further comprises the first chamber and the second chamber.
A third chamber is provided between the chambers, and the heat transfer tube extends through the first chamber, the third chamber, and the second chamber, and a refrigerant is provided in the third chamber. A third inlet for inflow and a third outlet for outflow of the refrigerant are provided, and the third outlet and the third inlet of the third chamber are connected to a third cold heat utilization facility; The refrigerant flowing out of the third outlet flows through the third cold heat utilization facility, flows into the third chamber from the third inlet, and cools the third chamber and the third cold heat. The cooling heat flowing through the utilization equipment is set to a third temperature lower than the first temperature and higher than the second temperature.

According to the present invention, a third chamber is provided between the first chamber and the second chamber, and the third chamber is connected to the third cold heat utilization facility. The temperature of the refrigerant in the third chamber is set to a third temperature lower than the first temperature and higher than the second temperature, and the refrigerant in the third chamber is supplied to the third cold heat utilization facility. Is done. Therefore, it is possible to supply cold energy to three cold energy utilization facilities having different cooling temperatures and to cool them to desired temperatures.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a heat exchanger and a cooling / heating system using the same according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a cross-sectional view schematically showing the entire first embodiment of the heat exchanger according to the present invention.
FIG. 2 is a partial cross-sectional view showing the heat exchanger of FIG.

1 and 2, the illustrated heat exchanger 2 has a cylindrical body 4, which has a cylindrical side wall 6 extending in a predetermined direction, that is, a vertical direction in FIGS. And a hemispherical bottom wall 8 provided at the lower end of the side wall 6. Inside the body 4 is a circular partition plate 1.
0, the upper first chamber 12 and the lower second chamber 14
And is divided into. In this embodiment, the inner diameter of the body 4 is set to about 1500 mm, and the gap d1 (FIG. 2) between the outer peripheral surface of the partition plate 10 and the inner peripheral surface of the side wall 6 of the trunk 4 is
It is set to about 2 to 3 mm, and the first
And the second chamber 14 are communicated with each other, and the gap d1
The refrigerant in the first chamber 12 (or the second chamber 14) can flow into the second chamber 14 (or the first chamber 12).

A substantially U-shaped heat transfer tube 16 is provided in the body 4. As shown in FIG. 3 (in FIG. 3, cut slits, inner fin members and outer fin members are omitted in FIG. 3), the heat transfer tube 16 is provided on the right side of FIGS. A first straight portion 18 extending in the direction (vertical direction), and a second straight portion 20 extending in a predetermined direction (vertical direction) on the left side of FIGS. The lower ends of 18, 20
They are connected by a curved portion 22 that is curved in an arc shape along the bottom wall 8. The heat transfer tube 16 has L as a cooling fluid.
NG (liquefied natural gas) is delivered. In this embodiment, a plurality of heat transfer tubes 16 are arranged at intervals in a direction substantially perpendicular to the predetermined direction, that is, in a direction perpendicular to the plane of FIG. 1 and FIG. L which is installed and cooled to about -160 ° C
NG is sent to these heat transfer tubes 16 as indicated by arrow 24. The LNG thus supplied is vaporized as described later while flowing through the heat transfer tube 16, and the vaporized natural gas flows out of the heat exchanger 2 as indicated by an arrow 26.

A plurality of (for example, four) first baffles 28 are arranged in the first chamber 12 of the body 4 at intervals in the predetermined direction (vertical direction). First baffle 28
Have substantially the same shape, and have a notch 30 cut in a chord on one side as shown in FIG. Such a baffle plate 28 has a notch 3 as shown in FIGS.
0s are arranged alternately. That is, in the uppermost and third highest baffle plates 28, the cutouts 30 are arranged so as to be located on the left side in FIGS. , The notch 30 is disposed so as to be located on the right side in FIGS. By arranging the baffle 28 in this way, the first flow path in the first chamber 12
8 and extends in the left-right direction in FIGS. A gap of about 2 to 3 mm is formed between the outer peripheral surface of the baffle plate 28 and the inner peripheral surface of the side wall 6 of the body 4, similarly to the partition plate 10, and the flow of the refrigerant through this gap is allowed. .

The first chamber 12 is provided with a first inlet 32 and a first outlet 34. First inlet 32
Are formed above an uppermost baffle plate 28 and formed on an inlet connection member 36 fixed to the body 4. Also the first
Is disposed at the fourth lowermost position from the top, that is, between the partition plate 10 and the upper baffle plate 28,
The outflow connection member 38 fixed to the body 4 is formed. With such a configuration, the first flow path becomes longer, and the refrigerant in the first chamber 12 flows into the first chamber 12 through the first inlet 32, and the refrigerant thus flown is bent. It flows through the first flow path and flows out of the body 4 from the first outlet 34.

The second chamber 14 of the body 4 includes the first chamber 12
Similarly to the above, a plurality of (for example, 22) second baffle plates 40 are arranged at intervals in the predetermined direction (vertical direction). The second baffle plate 40 has substantially the same shape as the first baffle plate 28, and has a notch 42 cut in a string shape on one side as shown in FIG. Baffle board 40
Are arranged such that the notches 42 are alternated as shown in FIGS. That is, in the odd-numbered baffle plate 40 from the top of the second chamber 14, the notch 42
In the even-numbered baffle 40 from the top, the notch 42 is arranged as shown in FIG.
And it is arrange | positioned so that it may be located in the right side in FIG.
By arranging the baffle plate 40 in this manner, the second flow path in the second chamber 14 is bent by the baffle plate 40 and extends in the left-right direction in FIGS. The partition plate 10 is also provided between the outer peripheral surface of the baffle plate 40 and the inner peripheral surface of the side wall 6 of the body 4.
Similarly, a gap of about 2 to 3 mm is formed, and the flow of the refrigerant through this gap is allowed.

The second chamber 14 is provided with a second inlet (not shown) and a second outlet 46. The second inlet is located above the uppermost baffle plate 40 of the second chamber 14, that is, between the baffle plate 40 and the partition plate 10, and is connected to the inlet connection member 44 fixed to the body 4. Is formed. Also, the second outlet 46 is provided with the lowermost baffle plate 40.
, That is, on the bottom wall 8 of the body 4,
Is formed on the outflow connection member 48 fixed to the outlet connection member 48. With such a configuration, the second flow path becomes longer, and the refrigerant in the second chamber 14 flows into the second chamber 14 through the second inlet 44, and the refrigerant that has flowed in is bent. It flows through the second flow path and flows out of the body 4 from the second outlet 46.

In this embodiment, alcoholic water is used as the refrigerant in the first chamber 12 and the second chamber 14. The alcoholic water to be cooled consists of, for example, 60% by weight of ethanol and the balance of water, the solidification temperature of which is about-
43.5 ° C. As a refrigerant, alcohol is 60w
It may be less than t%. In addition, the body 4 of the heat exchanger 2, the heat transfer tube 16, the partition plate 10, and the first and second
Baffle plates 28 and 40 can be formed of stainless steel having excellent low-temperature resistance, for example, SUS304.

In the present embodiment, the upper end of the body 4 is further opened, and a lid member 52 is detachably attached to this opening. The lid member 52 is provided with an inlet connection pipe 54 and an outlet connection pipe 56 that penetrate therethrough and extend in the up-down direction. At the lower end of the inlet connection pipe 54, an inlet header 58 is provided.
Are connected to the inlet header 58 of the first heat transfer tube 16.
Are connected at intervals. An outlet header 60 is connected to the lower end of the outlet connection pipe 56, and the outlet header 58 is connected to the second straight section 2 of each heat transfer pipe 16.
0 are connected at intervals. With this configuration, LNG supplied from the inlet connection pipe 56 as shown by the arrow 24 is supplied to each heat transfer pipe 16 via the inlet header 58.
And heat is exchanged between the alcohol water in the first chamber 12 and the alcohol water in the second chamber 14 while being sent through each heat transfer tube 16, and natural gas that has been vaporized is It flows out of the outlet connection tube 56 via the outlet header 60 as indicated by the arrow 26.

Referring to FIG. 2 and FIG. 4 to FIG. 7, in the heat exchanger 2 of this embodiment, fin members are disposed between the adjacent partition plates 10, 20, and 40.
Referring mainly to FIG. 4, a pair of through holes 62 are formed in the first baffle plate 28 (the second baffle plate 40) at intervals in a direction perpendicular to the plane of FIG. A plurality of sets (only five sets are shown in FIG. 4 but 40 sets in actuality) are provided corresponding to the number of the heat tubes 16. The first baffle 28 (second
The through holes 62 of the baffle plate 40) are formed at substantially the same position. Therefore, when the first baffle plate 28 (the second baffle plate 40) is arranged in the vertical direction, the through holes 62 are formed in the vertical direction. . The first baffle plate 28 (the second baffle plate 40) is formed with a notch slit 64 corresponding to each through hole 62 and extending in a direction substantially perpendicular to the direction in which the heat transfer tubes 16 are provided. ing. The cut slit 64 is formed in the first baffle plate 28 (the second baffle plate 4).
0), extends linearly through the corresponding through-hole 62 from outside.

Referring mainly to FIG. 4, similarly to the first baffle plate 28, the partition plate 10 is provided with a pair of through holes 66 at intervals in the direction perpendicular to the paper of FIGS. A plurality of sets (only five sets are shown in FIG. 5 but 40 sets in actuality) are provided corresponding to each heat transfer tube 16. The through hole 66 of the partition plate 10 is formed at substantially the same position as the through hole 62 of the first baffle plate 28. Therefore, when the partition plate 10 is arranged at a predetermined position with respect to the first baffle plate 28, The through holes 62 and 66 are arranged substantially in the vertical direction. In the partition plate 10, cut slits 68 are formed corresponding to the respective through holes 66 and extend in a direction substantially perpendicular to the direction in which the heat transfer tubes 16 are provided. Slit 6
Reference numeral 8 extends linearly from the outside of the partition plate 10 through the corresponding through hole 66.

As shown in FIGS. 2, 4, 5 and 6, the first straight portion 18 of each heat transfer tube 16 is provided with one through hole 62 of the first and second baffle plates 28 and 40 and The heat transfer tube 16 is mounted through one of the through holes 66 of the partition plate 10, and the second straight portion 20 of each heat transfer tube 16 is connected to the first and second baffle plates 2.
8 and 40, and the other through hole 66 of the partition plate 10 is installed. In this embodiment,
As shown in FIG. 6, the inner diameter of the through hole 62 (66, 62) of the first baffle plate 28 (partition plate 10, second baffle plate 40) is set to, for example, about 20 mm, while each heat transfer tube 1
The outside diameter of the straight portion 18 (20) of the sixth tube is set to, for example, about 19 mm, and the straight portion 18 (20) of the first baffle plate 28 (the partition plate 10, the second baffle plate 28) and each heat transfer tube 16 is provided. A gap d2 (FIG. 6) exists between the straight portion 18 (20) and the entire circumference, for example, about 0.5 mm. With such a configuration, the first and second chambers 12, 1
The alcohol water in 4 can flow through this gap d2 when ice does not freeze as described later.

In this embodiment, the inner portion 64a of the cut slit 64 of the first and second baffle plates 28, 40
(A portion extending inward from the through hole 62) and the partition plate 10
The inner fin member 70 is provided so as to penetrate an inner portion 68 a (a portion extending inward from the through hole 66) of the cut slit 68. The inner fin member 70 is formed of, for example, an elongated plate-like member, and extends in the axial direction along the linear portion 18 (20) of each heat transfer tube 16 as shown in FIG. The other side surface is provided so as to be in contact with the bottom surface of the inside portion of the heat transfer tube 68 and the straight portion 18 (20) of the heat transfer tube 16. The inner fin member 70 is preferably provided so as to pass therethrough from the uppermost baffle plate 28 to the lowermost baffle plate 40 in the fuselage 4. A cool storage effect is achieved. The inner fin member 70 has, for example, a width d3 (FIG. 6) of 10
Approximately 0mm and its axial length is 6,000m
m.

The first and second baffles 28, 40
The outer fin member 72 is provided so as to penetrate an outer portion 64a of the notch slit 64 (a portion extending from the outside to the through hole 62) and an outer portion 68a of the notch slit 68 of the partition plate 10 (a portion extending from the outside to the through hole 66). Have been.
The outer fin member 72 is formed of, for example, an elongated plate-like member, and extends in the axial direction along the linear portion 18 (20) of each heat transfer tube 16 as shown in FIG. It is provided so as to be in contact with the linear portion 18 (20), and the other side faces the opening of the slit 64 (68). The outer fin member 72 is also preferably provided so as to penetrate from the uppermost baffle plate 28 to the lowermost baffle plate 40 in the fuselage 4. A cool storage effect is achieved. The outer fin member 72 has, for example, a width d4.
(FIG. 6) can be formed to about 250 mm and its axial length to about 6,000 mm, and together with the inner fin member 70, stainless steel, for example, SUS304
Can be formed from

The baffle plates 28 and 40, the partition plate 10, and the fin members 70 and 72 are attached, for example, as follows. As shown in FIGS. 6 and 7, the inner fin member 70 and the outer fin member 72 are welded to appropriately spaced portions so that the baffle plates 28, 4 are provided.
0 and the partition plate 10. As shown in FIG. 2, one end of a plurality of (only two are shown in the figure) support rods 74 are fixed to the lid member 52, and the partition plate 10 and the Baffle plates 28 and 40 are mounted. The length d5 (FIG. 2) of the spacer member 76 is, for example, 300 mm.
The distance between the adjacent partition plate 10 and the baffle plates 28 and 40 is, for example, 150 mm.
Set to about.

Since the fin members 70 and 72, the partition plate 10, and the baffle plates 28 and 40 are attached as described above,
By removing the lid member 52 from the body 4, the heat transfer tube 1 is removed.
6, partition plate 10, baffle plates 28 and 40, and fin member 7
0, 72 can be taken out of the fuselage 4, and their maintenance is facilitated.

The heat exchanger 2 is provided with, for example, a pressure adsorption device 80 shown in FIG. With reference to FIG. 8 together with FIG. 1, the illustrated pressure adsorption device 80 includes a container body 82. A connection opening 84 is provided at one end of the container body 82.
The connection opening 84 communicates with the first chamber 12 of the body 4 via a connection pipe 86. Container body 82
Inside, a bag 88 that can be inflated and contracted is provided, and the opening of the bag 88 is connected to the connection pipe 86. This bag 8
8 can be formed, for example, from an elastic rubber material. At the bottom of the container body 82, an atmosphere opening 90 that opens to the atmosphere is provided, and the atmospheric pressure acts on the bag 88 through the atmosphere opening 90. With this configuration, when the pressure of the alcoholic water in the first chamber 12 and / or the second chamber 14 of the body 4 increases (or decreases), the body 4 (or the bag 8) increases.
The alcoholic water from 8) is supplied to the bag 88 through the connecting pipe 86.
(Or the body 4), and the bag 88 expands (or contracts) as shown by a two-dot chain line (or a solid line) in FIG.
Thus, the alcohol water in the first and second chambers 12 and 14 is maintained at the atmospheric pressure even if the pressure fluctuates.

Next, the operation of the above-described heat exchanger 2 will be described as follows. Referring again mainly to FIG. 2, LNG is fed to each heat transfer tube 16 through the inlet connection tube 54 as shown by the arrow 24,
Flows from the first chamber 12 to the second chamber 14 from above to below, further passes through the curved portion 22 and passes through the other straight portion 20 to the second
From the lower chamber 14 to the first chamber 12 from below. As the LNG flows in this manner, heat exchange is performed between the LNG and alcoholic water as the refrigerant, and the LNG is vaporized as natural gas from the outlet connection pipe 56 to the arrow 26.
Is discharged in the direction indicated by.

The alcohol water in the first chamber 12 of the body 4 is
LN is fed into the first chamber 12 through the first inlet 32 as indicated by the arrow 92 and flows through the first flow path.
A heat exchange takes place with G, whereby the cooled alcoholic water is cooled as required, and the cooled alcoholic water is passed through the first outlet 34 as shown by the arrow 94 to the outside of the body 4, for example, the first It is sent to the cold heat utilization equipment (to be described later).
In this embodiment, the temperature of the alcohol water flowing through the first chamber 12 is set to be equal to or higher than the first temperature, for example, equal to or higher than 0 ° C. The alcohol water cooled in this way can be used for cooling a first cold heat utilization facility, for example, an air conditioning facility. With this setting, the temperature of the natural gas discharged from the outlet connection pipe 56 can be set to 0 ° C. or higher, and the natural gas discharged from the natural gas can be used directly as household city gas.

The alcohol water in the second chamber 14 of the body 4 is supplied to the second chamber 14 through a second inlet (not shown) as shown by an arrow 96 (FIG. 1). During the flow through the second flow path, heat exchange occurs with the LNG, whereby the cooled alcoholic water is cooled as required, and the cooled alcoholic water is passed through the second outlet 46 as indicated by arrow 98. , For example, to a second cold heat utilization facility (to be described later). In this embodiment, the second chamber 1
The temperature of the alcohol water flowing through 4 is set to a second temperature lower than the first temperature or lower, for example, -35 ° C or lower. The alcohol water cooled in this way can be used for cooling a second cold heat utilization facility, for example, a refrigerated warehouse.

The heat exchanger 2 of this embodiment has the following features. First, the second chamber 14
Since the alcoholic water is cooled to −35 ° C. or lower, the alcoholic water is iced on the linear portions 18 and 20 (the portion located in the second chamber 14) of the heat transfer tube 16, and the linear portions 18 and 20 and the The gap between the second baffle plate 40 and the second baffle plate 40 is clogged with the iced ice, and the heat is conducted between the linear portions 18 and 20 and the second baffle plate 40. Therefore, the second baffle 4
Numeral 0 serves as a heat transfer fin integrated with the straight portions 18 and 20 of the heat transfer tube 16 by the iced alcohol water.
As described above, since the second baffle plate 40 has a heat transfer function, heat exchange with the alcohol water is efficiently performed.
In addition, since alcohol water comes to ice on a part of the surface of the second baffle plate 40, the second baffle plate 40 also has a cold storage function, and can store cold heat.

Second, the inner fin member 70 and the outer fin member 72 are in contact with the straight portions 18 and 20 of the heat transfer tube 16.
Are provided, the inner fin member 70 and the outer fin member 72 function as heat transfer fins integral with the straight portions 18 and 20 of the heat transfer tube 16. Thus, since the inner fin member 70 and the outer fin member 72 have a heat transfer function, heat exchange with the alcoholic water is performed efficiently (this heat transfer function is located in the first chamber 12). Also achieved in some parts). Further, as shown by a two-dot chain line 100 in FIG. 9, the inner fin member 70 and the outer fin member 72 are iced with alcohol water along the surfaces of the inner fin member 70 and the outer fin member 72. . Therefore, a large amount of ice adheres to the inner fin member 70 and the outer fin member 72 in the second chamber 14, so that a sufficient amount of cold heat can be stored, and cold heat using such a heat exchanger can be stored. The cold storage tank conventionally required in the system can be omitted.

In the above-described heat exchanger, the inner fin member 70 and the outer fin member 72 are provided in each of the straight portions 18 and 20 of the U-shaped heat transfer tube, but a sufficient heat transfer effect and a cool storage effect are achieved. In this case, one of the inner fin member 70 and the outer fin member 74 may be omitted, and the inner fin member 70 and the outer fin member 72 may be provided on one of the linear portions 18 and 20 instead of being provided on both of them. May be provided. The heat transfer tube 16, the first baffle plate 28, and the second baffle plate 40 can be provided in an appropriate number in consideration of the performance of the heat exchanger 2.

The above-described heat exchanger 2 is, for example, as shown in FIG.
Can be advantageously used in the cooling and heating system shown in FIG. In FIG. 10, the alcohol water in the first chamber 12 of the heat exchanger 2 is sent to the first cold heat utilization facility 102. Since the temperature of the alcohol water in the first chamber 12 is set to 0 ° C. or higher, the first cold heat utilization equipment 1 using the alcohol water is used.
02 is used, for example, for cooling air conditioning equipment such as a building. In this case, for example, the temperature of the alcohol water fed from the first chamber 12 of the heat exchanger 2 to the first cold heat utilization facility 102 is set to, for example, 5 ° C., and the first cold heat utilization facility 102 The temperature of the alcohol water returning to the room 12 is
Even if set at 10 ° C, such alcoholic water
It is supplied by the action of a first pump 104 disposed between the heat exchanger 2 and the first cold heat utilization facility 102. The alcohol water in the second chamber 14 of the heat exchanger 2 is
Is supplied to the cold heat utilization facility 106. Since the temperature of the alcohol water in the second chamber 14 is set to −35 ° C. or lower, the second cold heat utilization facility 106 that uses the alcohol water includes:
For example, it is used for cooling refrigerated warehouses. in this case,
For example, the temperature of the alcohol water supplied from the second chamber 14 of the heat exchanger 2 to the second cold heat utilization facility 106 is set to, for example, −35 ° C. The temperature of the alcohol water returning to 14 is, for example, -3
The temperature is set to 0 ° C., and such alcoholic water is supplied to the second cold-heat utilization facility 106 between the heat exchanger 2 and the second cold heat utilization facility 106.
Is supplied by the action of the pump 108 of FIG.

In this refrigeration system, furthermore, a portion between the first pump 104 and the first refrigeration system 102, a second pump 108 and the second refrigeration system 10
6 is connected via a first flow control valve 110, and by adjusting the opening of the first flow path control valve 110, the alcohol water flowing between the two parts is adjusted. The amount can be adjusted. Also, the second pump 108
And a portion between the second cold heat utilization facility 106 and the heat exchanger 2, and a portion between the second cold heat utilization facility 106 and the heat exchanger 2.
The flow rate of the alcoholic water flowing between these two portions can be adjusted by adjusting the opening degree of the second flow path control valve 112. Further, the portion between the first cold-heat utilization facility 102 and the heat exchanger 2 and the portion between the second cold-heat utilization facility 106 and the heat exchanger 2 correspond to the opening of the third flow control valve 114. By adjusting the degree, the flow rate of the alcohol water flowing between the two portions can be adjusted.

The heat transfer tube 16 of the heat exchanger 2 has LN
LNG is supplied from a G supply source (not shown), and natural gas vaporized in the heat exchanger 2 is supplied as city gas. In this cooling and heating system, the second chamber 1 of the fuselage 4
Since 4 also has a heat storage function, the cold storage tank can be omitted. Further, the temperature of the alcohol water in the first chamber 12 is 0
Degrees or more, the temperature of the natural gas flowing out of the heat transfer tubes 16 can be raised to a temperature of 0 degrees or more,
Therefore, a vaporizer for raising the temperature can be omitted.

FIG. 11 is a sectional view schematically showing a second embodiment of the heat exchanger according to the present invention. 11, the illustrated heat exchanger 202 includes a first chamber 206, a second chamber 208, and a third chamber 21 formed in the body 204.
0 is provided. The first chamber 206 is provided at an upper part of the body 204, the second chamber 208 is provided at a lower part of the body 204, and the third chamber 210 is provided at an intermediate part of the body 204. The first chamber 206 and the third chamber 210 are partitioned by a first partition plate 212, and the third chamber 210 and the second chamber 208 are partitioned by a second partition plate 214. The second partition plates 212 and 214 may have the same configuration as the above-described partition plate 10. The heat transfer tube 216 is formed in a substantially U-shape, and one straight portion thereof is connected to the first chamber 20.
6, extending downward from above through the third chamber 210 and the second chamber 208, and the other straight portion is the second chamber 208,
It extends upward from below through the third chamber 210 and the first chamber 206.

Also in this embodiment, the first chamber 206
, A first baffle plate 218 is provided at an interval in the up-down direction, a second baffle plate 220 is provided with a second baffle plate 220 at an up-down direction, and A third baffle plate 222 is provided at 210 at an interval in the vertical direction. First, second, and third baffles 218, 220,
222 is formed and arranged similarly to the first and second baffle plates 28 and 40 in the first embodiment. Further, the partition plates 212 and 214 and the baffle plate 21
8, 220, 222, the inner fin member 236 and the outer fin member 238 are mounted. Inner fin member 23
6 and the outer fin member 238 are similar to the inner fin member 70 and the outer fin member 72 in the first embodiment.
It is mounted so as to be in contact with the heat transfer tube 216. Other configurations of the heat exchanger 202 are substantially the same as those of the first embodiment.

The first chamber 206 is provided with a first inlet 224 and a first outlet 226. First outlet 2
From 26, for example, alcohol water of 5 ° C. (first temperature) or higher is supplied to first cold heat utilization equipment (not shown),
Then, alcoholic water at 10 ° C. flows into the first chamber 206 through the first inlet 224 from the first cold heat utilization facility. Examples of the first cold-heat utilization facility that utilizes the cold heat of the alcoholic water in the first chamber 206 include, for example, a building air-conditioning facility.

The second chamber 208 is provided with a first inlet 228 and a first outlet 230. Second outlet 2
From 30, for example, alcohol water at −35 ° C. (a second temperature lower than the first temperature) is supplied to a second cold heat utilization facility (not shown), and from the second cold heat utilization facility—
30 ° C. alcoholic water flows into the second chamber 208 through the second inlet 228. Examples of the second cold heat utilization facility that uses the cold heat of the alcoholic water in the second chamber 208 include a freezing warehouse, a refrigerated warehouse, and an artificial skating rink.

The third chamber 210 is provided with a third inlet 232 and a third outlet 234. Third outlet 2
From, for example, alcoholic water at −15 ° C. (a third temperature lower than the first temperature and higher than the second temperature) is supplied to a third cold heat utilization facility (not shown), and Alcohol water at -10 ° C from the third cold heat utilization facility
Flows into the third chamber 210 through the inflow port 232. As a third cold heat utilization facility that utilizes the cold heat of the alcoholic water in the third chamber 210, for example, there is an ice temperature warehouse.

When such a heat exchanger 202 is used, it is possible to supply cold heat to three cold heat utilization facilities having different cooling temperatures and to cool them to desired temperatures.

[0056]

According to the heat exchanger of claim 1 of the present invention,
A plurality of baffles are provided at predetermined intervals in the body, and a fin member extending in the axial direction of the heat transfer tube is provided between adjacent baffles. Therefore, these baffle plates and fin members have not only a heat transfer function of transmitting cold heat from the cold fluid to the refrigerant, but also a cold storage function due to the adhesion of ice to them. By providing the fin members in this manner, a sufficient surface area for adhering ice is secured, and a sufficient cold storage function is exhibited.

According to the heat exchanger of the second aspect of the present invention, the heat transfer tube is substantially U-shaped, and penetrates a plurality of baffle plates so as to be in contact with a pair of straight portions of the heat transfer tube. Since the fin member is provided at the front, the surface area to which ice adheres can be increased with a relatively simple configuration, and the heat transfer effect and the cold storage effect can be improved.

According to the heat exchanger of the third aspect of the present invention, the inner fin member is attached through the inside of the slit so as to be in contact with the inside of the pair of straight portions of the heat transfer tube. Since the outer fin member is attached to the outside of the slit so as to contact the outside of the straight part, the surface area to which ice adheres can be further increased, and the heat transfer effect and the cool storage effect are further improved Can be done.

According to the fourth aspect of the present invention, the body is divided into the first chamber and the second chamber by the partition plate, and the temperature of the refrigerant in the first chamber is set to the first temperature. The temperature of the refrigerant in the second chamber is set to be equal to or lower than the second temperature lower than the first temperature. The refrigerant in the first chamber is sent to the first cold utilization facility, and the refrigerant in the second chamber is sent to the second cold utilization facility. To cool each to a desired temperature.

According to the fifth aspect of the present invention, a communication gap communicating the first and second chambers is provided between the body and the partition plate to further absorb the pressure of the refrigerant. Since the pressure absorbing device is provided, even if the pressure of the refrigerant in the first chamber and / or the refrigerant in the second chamber fluctuates,
The pressure fluctuation of the refrigerant can be absorbed by the common pressure absorbing device.

According to the refrigeration system of the sixth aspect of the present invention, alcohol water is used as the refrigerant, the temperature of the alcohol water in the first chamber is set to 0 ° C. or higher, and the temperature of the second chamber is −35 ° C. When LNG is used as the cooling fluid, the LNG can be vaporized to a temperature of 0 ° C. or higher while flowing through the heat transfer tube by setting the temperature to 0 ° C. or lower. Further, the refrigerant in the second chamber can be used for cooling the refrigerated warehouse.

According to the cooling and heating system of the present invention, a plurality of first baffles are provided in the first chamber at intervals so as to form a bent first flow path. Therefore, the heat transfer effect in the first chamber can be enhanced. Further, since the plurality of second baffle plates are provided at intervals so as to form a bent second flow path in the second chamber, the heat transfer effect in the second chamber is reduced. Can be enhanced.

Further, according to the refrigeration system of claim 8 of the present invention, a third chamber is provided between the first chamber and the second chamber, and the third chamber is provided with the third refrigeration equipment. Connected to.
The temperature of the refrigerant in the third chamber is set to a third temperature lower than the first temperature and higher than the second temperature, and the refrigerant in the third chamber is supplied to the third cold heat utilization facility. Is done. Therefore, it is possible to supply cold energy to three cold energy utilization facilities having different cooling temperatures and to cool them to desired temperatures.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view schematically showing one embodiment of a heat exchanger according to the present invention.

FIG. 2 is a sectional view showing the heat exchanger of FIG. 1 with a middle portion thereof cut away.

FIG. 3 is a partially omitted perspective view showing a heat transfer tube and a baffle plate of the heat exchanger of FIG. 2;

FIG. 4 is a perspective view showing a first baffle plate in the heat exchanger of FIG. 2;

FIG. 5 is a perspective view showing a partition plate in the heat exchanger of FIG.

FIG. 6 is a sectional view taken along line VI-VI in FIG. 2;

FIG. 7 is a sectional view taken along line VII-VII in FIG.

FIG. 8 is a sectional view showing a pressure absorbing device in the heat exchanger of FIG.

FIG. 9 is a partial cross-sectional view showing a state where ice is attached to an inner fin member and an outer fin member in the heat exchanger of FIG. 2;

10 is a system diagram schematically showing an example of a cooling and heating system using the heat exchanger of FIG.

FIG. 11 is a cross-sectional view schematically showing a second embodiment of the heat exchanger according to the present invention.

[Explanation of symbols]

 2,202 Heat exchanger 4,204 Body 10, 212, 214 Partition plate 12, 206 First chamber 14, 208 Second chamber 16, 216 Heat transfer tube 28, 218 First baffle plate 32, 224 First Inflow port 34,226 First outflow port 40,220 Second baffle plate 46,230 Second outflow port 62,66 Through hole 64,68 Cut slit 70,236 Inner fin member 72,238 Outer fin member 80 Pressure Absorber 102 First cold heat utilization equipment 106 Second cold heat utilization equipment 210 Third chamber 222 Third baffle plate 228 Second inlet 232 Third inlet 234 Third outlet

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-9-318217 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) F28D 7/16 F25D 3/10 F28D 20 / 00 F28F 9/24

Claims (8)

(57) [Claims] 1. A body extending in a predetermined direction, a plurality of baffles arranged at intervals in the predetermined direction to form a bent flow path in the body, and the plurality of baffles A heat transfer tube provided through and extending in the axial direction of the heat transfer tube,
A fin member disposed between the adjacent baffle plates so as to be in contact with the heat transfer tube, wherein the body is provided with an inlet through which a refrigerant flows in and an outlet through which the refrigerant flows out; A cooling fluid that is heat-exchanged to the refrigerant in the body is supplied, and the plurality of baffle plates and the fin members have a heat transfer function of transmitting cold heat of the cooling fluid flowing through the heat transfer tube to the refrigerant. A heat exchanger having a cold storage function by having ice attached thereto. 2. The heat transfer tube is substantially U-shaped, and the plurality of baffle plates are provided with a pair of through holes through which the heat transfer tubes are inserted, and the pair of through holes extend from the through holes. The heat exchanger according to claim 1, wherein a slit is provided, and the fin member is provided through a slit of the plurality of baffle plates. 3. The plurality of baffle plates are formed with cut slits extending from the outside through the through holes, and an inner fin member is disposed inside the heat transfer tube mounted through the through holes. An outer fin member is provided outside the inner fin member, and the inner fin member is provided to penetrate an inner portion of the cut slit of the plurality of baffle plates, and the outer fin member is provided with a cut slit of the plurality of baffle plates. The heat exchanger according to claim 2, wherein the heat exchanger is provided so as to penetrate an outside portion of the heat exchanger. 4. A body which extends in a predetermined direction and is divided into first and second chambers by a partition plate;
And a heat transfer tube extending through the chamber. The first chamber of the body is provided with a first inlet through which a refrigerant flows in and a first outlet through which the refrigerant flows out. The second chamber is provided with a second inlet through which the refrigerant flows and a second outlet through which the refrigerant flows out, and the heat transfer tube is supplied with a cooling fluid that is exchanged with the refrigerant in the body. A first outlet and a first inlet of the first chamber are a first outlet;
The refrigerant flowing out of the first outlet is connected to the cold heat utilization facility, and flows through the first cold heat utilization facility,
The first inlet flows into the first chamber from the first inlet, and the second outlet and the second inlet of the second chamber are the second outlet.
The refrigerant flowing out of the second outlet of the second chamber flows through the second cold utilization facility, and flows into the second chamber from the second inlet. The cold heat flowing through the first chamber and the first cold heat utilization facility is set to a first temperature or higher, and the cold heat flowing through the second chamber and the second cold heat utilization facility is at the first temperature. A cooling / heating system, wherein the temperature is set to be lower than or equal to a second temperature lower than the second temperature. 5. The refrigerant in the first chamber and the refrigerant in the second chamber are the same refrigerant, and the first chamber and the second chamber are provided between the body and the partition plate. 5. A gap according to claim 4, wherein said first and / or second chamber is further provided with a pressure absorbing device for absorbing pressure fluctuation of said refrigerant. Cooling system. 6. The cooling fluid is liquefied natural gas, the refrigerant is alcoholic water, the temperature of the alcoholic water flowing through the first chamber is 0 ° C. or higher, and the temperature of the alcoholic water flowing through the second chamber is The cooling and heating system according to claim 4 or 5, wherein the temperature of the alcoholic water flowing through is -35 ° C or less. 7. A plurality of first baffles are provided in the first chamber at intervals in the predetermined direction to form a bent first flow path, and the plurality of first baffles are provided in the first chamber. The first inflow port is disposed above a first baffle plate, the first outflow port is disposed below the plurality of first baffle plates, and the second chamber has In order to form a bent second flow path, a plurality of second flow paths are spaced apart in the predetermined direction.
Are provided, the second inlet is disposed above the plurality of second baffles, and the second outlet is disposed below the plurality of second baffles. The cooling and heating system according to any one of claims 4 to 6, wherein 8. A third chamber is provided between the first chamber and the second chamber, and the heat transfer tube is provided between the first chamber and the third chamber.
Extending through the first chamber and the second chamber, the third chamber is provided with a third inlet into which a refrigerant flows and a third outlet through which the refrigerant flows, and the third chamber The third outlet and the third inlet are connected to a third cold heat utilization facility, and the refrigerant flowing out of the third outlet is the third refrigerant.
Flows through the third cold inlet, flows into the third chamber from the third inlet, and the cold flowing through the third chamber and the third cold heater utilizes lower temperature than the first temperature and The cooling and heating system according to claim 4, wherein the third temperature is set higher than the second temperature.