JP2015180151A - Cooling apparatus for closed circulatory refrigerant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling apparatus for cooling a closed circulatory refrigerant, which can be installed in an existing generator set.SOLUTION: A cooling apparatus 1, which is provided in a closed circulation cooling system 200 for circulating a closed circulatory refrigerant to cool a predetermined area near a generator 130 for generating electric power by a hydraulic turbine and the like and which cools the closed circulatory refrigerant, includes a heat exchanger detachably arranged along a surface of a pressure iron pipe 110, within which water flows, and performing heat exchange between the closed circulatory refrigerant and the water flowing through the pressure iron pipe 110.

Description

  The present invention relates to a cooling device for a closed circulation refrigerant, which is applied to cooling a closed circulation refrigerant whose temperature has been increased and used for cooling a bearing or the like of a water turbine generator.

  2. Description of the Related Art Conventionally, a rotating machine having a rotating part such as a generator or an electric motor has a guide bearing and a thrust bearing to support the rotating part. When the rotating part rotates, frictional heat is generated between the rotating part and the stationary part of the bearing, and accordingly, the temperature of the lubricating oil in the bearing oil tank rises. For this reason, in order to continuously operate the rotating machine for a long time, it is necessary to cool the lubricating oil. In the generator, cooling air is supplied to cool the stator winding and the like. However, since the cooling air is circulated in the hermetic rotary machine, this air needs to be cooled. .

  Generally, in a turbine generator of a hydroelectric power plant, as a method of cooling the air in a sealed space in which bearing oil tanks and stator windings are housed, a cooler using water taken from a hydraulic iron pipe or a discharge channel as a refrigerant. Heat exchange.

  However, when the water quality of river water is poor (sediment inflow or dust is large), the strainer clogged in the cooling water piping system to remove soil or dust, or the soil that has passed without being captured by the strainer As a result, the capillary tube of the cooler is clogged, resulting in a problem that the cooling performance is deteriorated.

  Therefore, conventionally, a closed circulation cooling system for circulating the closed circulation refrigerant is formed, and the closed circulation refrigerant is circulated in the closed circulation cooling system, thereby cooling a predetermined portion near the generator, for example, a bearing oil tank and a stator winding. Cool the enclosed space where the wires are stored. Furthermore, a heat exchanger for cooling the heated closed circulation refrigerant is connected to this closed circulation cooling system, and this heat exchanger exchanges heat between the closed circulation refrigerant and water flowing through the hydraulic iron pipe and the discharge channel. And a technique of cooling the closed circulation refrigerant has been proposed.

  According to this technology, the water in the hydraulic iron pipe and the discharge channel is not directly used as a coolant for cooling the lubricating oil and the stator windings, etc. The influence on the cooling performance can be reduced.

  Further, as a conventional technique of this type, an apparatus described in Patent Document 1 has been proposed. According to Patent Document 1, a technique is described in which a heat exchanger that performs heat exchange with a closed circulation refrigerant is provided inside the hydraulic iron pipe, and the closed circulation refrigerant is cooled by water flowing in the hydraulic iron pipe.

JP 2000-170638 A

  However, when a heat exchanger is installed in the hydraulic iron pipe as in the technique described in Patent Document 1, a large water pressure is applied to the inside of the hydraulic iron pipe when the load is interrupted, so that the heat exchanger can withstand the water pressure. Need to be structure and strength. In this case, the heat exchanger may be increased in size in order to increase the strength of the heat exchanger. When the heat exchanger is increased in size, the flow of water is inhibited by the heat exchanger and the loss head is increased. For this reason, there exists a possibility that electric power generation efficiency may fall.

  Moreover, when installing a heat exchanger in a hydraulic iron pipe, it is necessary to provide the hydraulic iron pipe with the piping hole for letting the piping through which a closed circulation refrigerant passes. However, providing a piping hole in an existing hydraulic iron pipe leads to a decrease in strength of the hydraulic iron pipe, so it is desirable not to provide a piping hole. Moreover, if a piping hole is provided, it is necessary to provide it from the beginning of manufacture in consideration of the strength of the hydraulic iron pipe. Thus, it is difficult at present to install a heat exchanger in an existing hydraulic iron pipe.

  An object of this invention is to provide the cooling device which solves such a problem and cools a closed circulation refrigerant | coolant which can be installed in existing flowing water piping.

  In order to achieve the above object, the present invention has the following configuration.

  (1) A cooling device that is provided in a closed circulation cooling system that cools a predetermined portion near a generator by circulating a closed circulation refrigerant, and cools the closed circulation refrigerant, and a surface of a flowing water pipe through which water flows. And a heat exchanger for exchanging heat between the closed circulation refrigerant and the flowing water pipe, and a closed circulation refrigerant cooling device.

According to (1), the heat exchanger for cooling the closed circulation refrigerant in the closed circulation cooling system is detachably installed from the outside of the running water pipe. As a result, heat exchange is performed between the closed circulation refrigerant and the flowing water pipe cooled by the water flowing inside, and the closed circulation refrigerant can be cooled.
For this reason, it is no longer necessary to modify the running water piping to pass the piping through which the closed circulating refrigerant passes through the running water piping as in the past, and by installing a heat exchanger in the existing running water piping, It becomes possible to cool.
Moreover, since the heat exchanger is installed outside the running water pipe, it does not receive water pressure from running water in the running water pipe. For this reason, it is not necessary to consider the point that the heat exchanger is strong enough to withstand water pressure compared to the case where it is installed inside running water piping. The material can be selected by giving priority to thermal conductivity over strength, such as adopting copper.
Moreover, since the heat exchanger can be visually recognized from the outside, the heat exchanger can be inspected outside.

  (2) In (1), the heat exchanger can be divided into a plurality of heat exchange units, and the plurality of heat exchange units are arranged so as to surround the flowing water pipe. Refrigerant cooling device.

  According to (2), it is possible to easily install a heat exchanger in running water piping.

  (3) In (2), the heat exchanging part has one cooling pipe through which the closed circulation refrigerant passes, and the cooling pipe is repeatedly bent after being bent in an arc shape from one end. An apparatus for cooling a closed circulation refrigerant having a meandering structure in which a plurality of arc-shaped portions formed thereby are arranged in a direction in which the flowing water pipe extends.

  According to (3), since the heat exchanging unit has a structure in which one cooling pipe meanders, the closed circulation refrigerant flowing through the cooling pipe is heat-exchanged in a relatively long path. This makes it possible to reliably cool the closed circulation refrigerant.

  (4) In (2), the heat exchanging section includes a plurality of cooling pipes curved in an arc shape, a rod-shaped introduction side pipe closed at both ends, and a rod-shaped discharge side pipe closed at both ends. The introduction side pipe has an introduction part for introducing the closed circulation refrigerant, the discharge side pipe has a discharge part for discharging the closed circulation refrigerant, and the plurality of cooling pipes Is arranged between the introduction side pipe and the discharge side pipe, one end is connected to the introduction side pipe and the other end is connected to the discharge side pipe so that the closed circulation refrigerant can flow therethrough, An apparatus for cooling a closed circulation refrigerant, wherein the pipes are arranged in an extending direction.

  According to (4), even if one of the plurality of cooling pipes is blocked, the closed circulating refrigerant passes through the other cooling pipes, so that the closed circulating refrigerant can be cooled stably. It becomes possible.

  (5) In (1) to (4), the generator is a turbine generator, and water for rotating a rotor of the turbine generator flows in the flowing water pipe. A closed circulating refrigerant cooling device.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the cooling device which cools a closed circulation refrigerant | coolant which can be installed in existing flowing water piping.

It is explanatory drawing which shows arrangement | positioning in the hydroelectric power plant equipment 100 of the cooling device 1 in embodiment of this invention. It is explanatory drawing which shows the structure of the cooling device 1 in 1st Embodiment of this invention. It is explanatory drawing which shows the structure of the cooling device 1 in 2nd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an explanatory diagram showing the arrangement of the cooling device 1 in the present embodiment in the hydroelectric power plant equipment 100.

  The hydroelectric power plant equipment 100 includes a hydraulic iron pipe 110 corresponding to flowing water piping, an inlet valve 120, a generator 130, a generator upper bearing 132, a generator lower bearing 134, a turbine / generator shaft 136, a generator The air cooling pipe 140, the water wheel 150, the water wheel bearing 152, the suction pipe 160, the circulation pump 170, and the closed circulation cooling system 200 are provided.

  The hydraulic iron pipe 110 extends from a reservoir (not shown) and is connected to the water turbine 150 via the inlet valve 120. The lower part of the water turbine 150 is connected to the suction pipe 160.

  The inlet valve 120 is a valve provided in the hydraulic iron pipe 110. By opening the inlet valve 120, the water in the reservoir flows from the hydraulic iron pipe 110 through the water turbine 150 to the outside through the suction pipe 160.

  The water wheel 150 includes a water wheel runner (not shown), and the water wheel runner is rotated by a reaction force or impulsive force of flowing water passing through the water wheel 150.

  A generator 130 is disposed on the top of the water turbine 150. The generator 130 includes a rotor 130a and a stator 130b. The rotor 130a and the water turbine runner (not shown) are coaxially fixed to the water turbine / generator shaft 136.

  The generator upper bearing 132, the generator lower bearing 134, and the water turbine bearing 152 rotatably support the turbine / generator shaft 136. The generator upper bearing 132 is an upper portion of the generator 130, and the generator lower bearing 134 is The lower part of the generator 130 and the water wheel bearing 152 are provided at the lower part of the generator 130 and at the upper part of the water wheel 150.

  Although not shown, bearing oil tanks are respectively installed corresponding to the generator upper bearing 132, the generator lower bearing 134, and the water turbine bearing 152. Lubricating oil is stored in the bearing oil tank, and the lubricating oil is supplied to the generator upper bearing 132, the generator lower bearing 134 and the water turbine bearing 152. Further, since the temperature of the lubricating oil in the bearing oil tank rises due to frictional heat due to rotation in the generator upper bearing 132, the generator lower bearing 134, and the water turbine bearing 152, the cooling that suppresses the temperature rise of the lubricating oil in the bearing oil tank. A vessel (not shown) is provided.

  The generator air cooling pipe 140 is provided around the generator 130, and cools the generator windings constituting the stator 130b.

  The closed circulation cooling system 200 is a closed cycle cooling circuit configured by cooling water pipes 210A, 210a, 210b, 210c, 210d, and 210B. A cooling water (not shown) corresponding to the generator upper bearing 132, the generator lower bearing 134, and the water turbine bearing 152 and the power generation are generated by circulating the cooling water 220 corresponding to the closed circulation refrigerant through the closed circulation cooling system 200. The machine air cooling pipe 140 and the like are cooled.

  The circulation pump 170 is attached to the closed circulation cooling system 200, and applies pressure to the cooling water 220 so that the cooling water 220 circulates through the cooling water pipes 210A, 210a, 210b, 210c, 210d, and 210B.

  The cooling device 1 is installed at the end of the hydraulic iron pipe 110. Moreover, the cooling device 1 cools the cooling water 220 of the closed circulation cooling system 200. The configuration of the cooling device 1 will be described later with reference to FIG.

  The cooling device 1 has an outgoing cooling water pipe 210A connected to the outflow side A. The cooling water pipe 210A is branched into a cooling water pipe 210a and a cooling water pipe 210b by a branch part B, and the cooling water pipe 210a is a generator. The upper bearing 132 is connected to a cooler (not shown). The cooling water pipe 210 b is connected to the generator air cooling pipe 140.

  Further, the cooling water pipe 210A is branched into the cooling water pipe 210c by the branch portion C, and the cooling water pipe 210c is connected to a cooler (not shown) of the generator lower bearing 134. Further, the cooling water pipe 210 </ b> A is branched to the cooling water pipe 210 d by the branch portion D, and the cooling water pipe 210 d is connected to a cooler (not shown) of the water turbine bearing 152.

  The cooling water pipe 210a, the cooling water pipe 210b, the cooling water pipe 210c, and the cooling water pipe 210d described above are connected to the cooling water pipe 210B on the return path and merge at the outflow sides E, F, and G in the cooling water pipe 210B. The cooling water pipe 210 </ b> B is connected to the circulation pump 170 and connected to the inflow side H to the cooling device 1.

  Next, the configuration of the cooling device 1 according to the first embodiment of the present invention will be described with reference to FIG.

FIG. 2A is a front view of the cooling device 1, and FIG. 2B is a side view of the cooling device 1.
The cooling device 1 includes a heat exchanger 10, an introduction unit 20, and a discharge unit 30.

  The heat exchanger 10 includes a first heat exchange unit 12 and a second heat exchange unit 14, and is formed into a cylindrical shape by combining the first heat exchange unit 12 and the second heat exchange unit 14, and the water pressure It is disposed along the surface of the iron pipe 110.

  The 1st heat exchange part 12 and the 2nd heat exchange part 14 are substantially semi-cylindrical shapes formed by dividing a cylindrical shape into two by a virtual plane including a central axis.

  The first heat exchange unit 12 includes one cooling pipe 12 a, an introduction side connection part 12 b connected to the introduction part 20, and a discharge side connection part 12 c connected to the discharge part 30.

  The cooling pipe 12a has a meandering structure in which it is bent after being bent into a semicircular shape from one end, and then repeatedly bent after being bent into a semicircular shape. Thus, the semicircular portions are arranged in the direction of the central axis of the heat exchanger 10, that is, the direction in which the hydraulic iron pipe 110 extends, and are formed in a semicylindrical shape. The introduction side connecting portion 12b is attached to one end portion of the cooling pipe 12a, and the discharge side connecting portion 12c is attached to the other end portion of the cooling pipe 12a.

  The second heat exchanging unit 14 includes one cooling pipe 14 a, an introduction side connection unit 14 b connected to the introduction unit 20, and a discharge side connection unit 14 c connected to the discharge unit 30.

  The cooling pipe 14a has a meandering structure in which it is bent after being bent into a semicircular shape from one end, and then repeatedly bent after being bent into a semicircular shape. As a result, the semicircular portions are arranged in the direction of the central axis of the heat exchanger 10, that is, the direction in which the hydraulic iron pipe 110 extends to form a semicylindrical shape. The semi-cylindrical shape by the cooling pipe 12a and the semi-cylindrical shape by the cooling pipe 14a are the same shape. The introduction side connection portion 14b is attached to one end portion of the cooling pipe 14a, and the discharge side connection portion 14c is attached to the other end portion of the cooling pipe 14a.

  When the first heat exchange unit 12 and the second heat exchange unit 14 are combined into a cylindrical shape, the introduction-side coupling unit 12b and the introduction-side coupling unit 14b are arranged at positions adjacent to each other. Similarly, the discharge side connecting portion 12c and the discharge side connecting portion 14c are also arranged at positions adjacent to each other.

  The introduction part 20 includes a three-way joint connected to the introduction side connection part 12b, the introduction side connection part 14b, and the cooling water pipe 210A.

  The discharge part 30 consists of a three-way joint connected to the discharge side connection part 12c, the discharge side connection part 14c, and the cooling water pipe 210B.

  And the 1st heat exchange part 12 and the 2nd heat exchange part 14 are covered from the outer side to the edge part of the hydraulic iron pipe 110, it arrange | positions along the surface of the hydraulic iron pipe 110, and it combines so that it may become a cylindrical shape. Furthermore, the introduction part 20 is connected to the introduction side connection part 12b and the introduction side connection part 14b, and the discharge part 30 is connected to the discharge side connection part 12c and the discharge side connection part 14c. Thereby, the cooling device 1 is installed in the hydraulic iron pipe 110.

  Further, by connecting the cooling water pipe 210B to the introduction part 20 and the cooling water pipe 210A to the discharge part 30, the cooling water 220 circulating through the closed circulation cooling system 200 is supplied to the first heat exchange part 12 and the second heat exchange part 12. It passes through the heat exchange unit 14.

  Next, cooling of the cooling water 220 circulating through the closed circulation cooling system 200 by the cooling device 1 of the first embodiment will be described.

  In the hydroelectric power plant equipment 100, the water in the reservoir flows from the hydraulic iron pipe 110 through the water turbine 150 to the suction pipe 160 by opening the inlet valve 120, and the water turbine runner in the water turbine 150 flows through the water flowing through the water turbine 150. It rotates by reaction force or impulse. When the water turbine runner rotates, the water turbine / generator shaft 136 rotates and the rotor 130a rotates. Electricity is generated by the rotation of the rotor 130a.

  In a state where the water turbine runner is rotating, the circulation pump 170 is set to a driving state. When the circulation pump 170 is driven, the cooling water 220 in the closed circulation cooling system 200 circulates and moves. The cooling water 220 passing through the cooling water pipe 210a exchanges heat with the lubricating oil of the generator upper bearing 132, and the cooling water 220 passing through the cooling water pipe 210b exchanges heat with the air of the generator air cooling pipe 140, The cooling water 220 passing through the cooling water pipe 210c exchanges heat with the lubricating oil of the generator lower bearing 134, and the cooling water 220 passing through the cooling water pipe 210d exchanges heat with the lubricating oil of the water turbine bearing 152. The cooling water 220 whose temperature has been increased by the heat exchange is introduced into the cooling device 1 through the cooling water pipe 210B.

  When the cooling water 220 introduced into the cooling device 1 passes through the first heat exchange unit 12 or the second heat exchange unit 14, heat exchange is performed with the hydraulic iron pipe 110 in a state cooled by the water flow passing through the inside. The cooling water 220 is cooled. Then, the cooling water 220 cooled by the cooling device 1 is sent out to the cooling water pipe 210A, and sent out from the cooling water pipe 210A to the cooling water pipes 210a, 210b, 210c, and 210d.

  According to the cooling device 1 of the first embodiment configured as described above, the heat exchanger 10 for cooling the cooling water 220 in the closed circulation cooling system 200 is installed so as to cover the outer surface of the hydraulic iron pipe 110. It becomes possible. For this reason, it becomes possible to arrange | position the cooling device 1 of this embodiment to the existing hydraulic iron pipe 110 in a hydroelectric power station, and the system for cooling the cooling water 220 in the closed circulation cooling system 200 is constructed easily. It becomes possible to do.

  Moreover, according to 1st Embodiment, since the heat exchanger 10 is not arrange | positioned in a hydraulic iron pipe like the past, it does not receive the influence of a hydraulic pressure. For this reason, it is not necessary to consider the point of making the heat exchanger strong enough to withstand water pressure compared to the case where a heat exchanger is installed inside the hydraulic iron pipe, and when selecting the material of the heat exchanger, The material can be selected giving priority to thermal conductivity over strength, such as adopting copper instead of steel.

  Moreover, according to 1st Embodiment, since the heat exchanger 10 can be visually recognized from the outside, external inspection is possible.

  Moreover, according to 1st Embodiment, since the 1st heat exchange part 12 and the 2nd heat exchange part 14 consist of one cooling pipe 12a and 14a, respectively, the cooling water 220 which passes through the cooling pipes 12a and 14a is obtained. The path for exchanging heat with the hydraulic iron pipe 110 becomes longer. For this reason, it becomes possible to cool the cooling water 220 reliably.

Next, the configuration of the cooling device 2 according to the second embodiment of the present invention will be described with reference to FIG.
FIG. 3A is a front view of the cooling device 2, and FIG. 3B is a side view of the cooling device 2.
The cooling device 2 includes a heat exchanger 50, an introduction unit 60, and a discharge unit 70.

  The heat exchanger 50 includes a first heat exchange part 52 and a second heat exchange part 54. The heat exchanger 50 is formed into a cylindrical shape by combining the first heat exchange part 52 and the second heat exchange part 54. It is disposed along the surface of the iron pipe 110.

  The 1st heat exchange part 52 and the 2nd heat exchange part 54 are semi-cylindrical shapes formed by dividing a substantially cylindrical shape into two by a virtual plane including a central axis.

  The first heat exchange unit 52 includes a plurality of cooling pipes 52a curved in a semicircular shape, a rod-like introduction side pipe 52b closed at both ends, a rod-like discharge side pipe 52c closed at both ends, and an introduction The inlet side connection part 52d connected to the part 60 and the discharge side connection part 52e connected to the discharge part 70 are comprised.

  The introduction side pipe 52b and the discharge side pipe 52c are arranged in parallel, and one end of the plurality of cooling pipes 52a is connected to the introduction side pipe 52b and the other end is connected to the discharge side pipe 52c. Further, the plurality of cooling pipes 52a are arranged side by side in the axial direction of the introduction side pipe 52b and the discharge side pipe 52c, in other words, in the direction in which the hydraulic iron pipe 110 extends. Thereby, a semi-cylindrical shape is formed by the plurality of cooling pipes 52a. The introduction side connection part 52d is attached to the center part of the introduction side pipe 52b, and the discharge side connection part 52e is attached to the center part of the discharge side pipe 52c.

  When the first heat exchange part 52 and the second heat exchange part 54 are combined into a cylindrical shape, the introduction side connection part 52d and the introduction side connection part 54d are arranged at positions adjacent to each other. Similarly, the discharge side connection part 52e and the discharge side connection part 54e are also arranged at positions adjacent to each other.

  The introduction part 60 includes three-way joints connected to the introduction side connection part 52d, the introduction side connection part 54d, and the cooling water pipe 210B.

  The discharge part 70 consists of a three-way joint connected to the discharge side connection part 52e, the discharge side connection part 54e, and the cooling water pipe 210A.

  And the 1st heat exchange part 52 and the 2nd heat exchange part 54 are covered from the outer side to the edge part of the hydraulic iron pipe 110, and it arrange | positions so that the surface of the hydraulic iron pipe 110 may be met. Furthermore, the cooling device 2 is connected to the hydraulic iron pipe 110 by connecting the introduction part 60 to the introduction side connection part 52d and the introduction side connection part 54d, and connecting the discharge part 70 to the discharge side connection part 52e and the discharge side connection part 54e. Installed.

  Further, by connecting the cooling water pipe 210B to the introduction part 60 and connecting the cooling water pipe 210A to the discharge part 70, the cooling water 220 circulating through the closed circulation cooling system 200 is supplied to the first heat exchange part 52 and the second heat exchange part 52. It passes through the heat exchanging section 54.

  The cooling of the cooling water 220 by the cooling device 2 of the second embodiment is the same as that of the cooling device 1 of the first embodiment, except that the moving path of the cooling water 220 is different from that of the cooling device 1 of the first embodiment. .

  According to the cooling device 2 of the second embodiment configured as described above, the cooling device 1 of the present embodiment is disposed in the existing hydraulic iron pipe 110 in the hydroelectric power station, similarly to the cooling device 1 of the first embodiment. This makes it possible to easily construct a system for cooling the cooling water 220 in the closed circulation cooling system 200. Furthermore, when selecting the material of the heat exchanger, the heat conductivity can be given priority over the strength. Moreover, since the heat exchanger 10 can be visually recognized from the outside, external inspection is possible.

  In addition, according to the second embodiment, the cooling water 220 moves from the introduction side pipes 52b and 54b to the discharge side pipes 52c and 54c through the plurality of cooling pipes 52a. It becomes possible to increase the quantity of the cooling water 220 which flows into 50 rather than the heat exchanger 10 of 1st Embodiment.

  In addition, according to the second embodiment, by having the plurality of cooling pipes 52a, even if one of the plurality of cooling pipes 52a and 54a is blocked, the other cooling pipes 52a and 54a are connected to the cooling water. Since 220 passes, it becomes possible to cool the cooling water 220 stably.

  As mentioned above, although embodiment of this invention was described, embodiment of this invention is not restricted to embodiment mentioned above. For example, in the embodiment described above, the heat exchanger 10 is divided into two parts, but is not limited thereto, and may be divided into three parts or four parts. In this case, the cooling pipes 12a and 14a and the cooling pipes 52a and 54a are curved in an arc shape.

  Moreover, in 1st, 2nd embodiment mentioned above, although the piping for cooling curved in the semicircle shape so that the circumferential surface of the hydraulic iron pipe 110 may be arranged in the direction where the hydraulic iron pipe 110 is extended, it is not restricted to it. Instead, the cooling pipe may be linearly extended in the direction in which the hydraulic iron pipe 110 extends, and this straight portion may be arranged along the circumferential surface of the hydraulic iron pipe 110.

  Moreover, in 1st, 2nd embodiment mentioned above, although the piping for cooling of the heat exchangers 10 and 50 is cylindrical, not only it but a square tube may be sufficient.

  In the first and second embodiments described above, the cooling devices 1 and 2 are disposed in the hydraulic iron pipe 110. However, the cooling apparatus 1 and 2 are not limited to the hydraulic iron pipe 110, and are pipes or cases in which cold water flows. The present invention can be applied to any object such as a body.

  In the above-described embodiment, the turbine generator that generates electricity by rotating the turbine has been described as a specific example. However, the type of the generator is not limited thereto, and the present invention is a generator having a bearing. Applicable if available.

1, 2 Cooling device 10, 50 Heat exchanger 12, 52 First heat exchange part 12a, 52a Cooling pipe 12b, 52d Inlet side connecting part 12c, 52e Discharge side connecting part 14, 54 Second heat exchanging part 14a, 54a Cooling piping 14b, 54d Inlet side connecting portion 14c, 54e Discharge side connecting portion 20, 60 Inlet portion 30, 70 Discharging portion 52b, 54b Inlet side piping 52c, 54c Discharge side piping 100 Hydroelectric power plant equipment 110 Hydraulic iron pipe 120 Inlet valve DESCRIPTION OF SYMBOLS 130 Generator 130a Rotor 130b Stator 132 Generator upper bearing 134 Generator lower bearing 136 Turbine / generator shaft 140 Generator air cooling pipe 150 Turbine 152 Turbine bearing 160 Suction pipe 170 Circulation pump 200 Closed circulation cooling system 210A, 210B, 210a, 210b, 210c, 210d Cooling water piping 220 Cooling water

Claims (5)

A cooling device that is provided in a closed circulation cooling system that cools a predetermined portion near a generator by circulating a closed circulation refrigerant, and cools the closed circulation refrigerant,
An apparatus for cooling a closed circulation refrigerant, comprising a heat exchanger that is detachably disposed along a surface of a flowing water pipe through which water flows, and exchanges heat between the closed circulating refrigerant and the flowing water pipe. . The heat exchanger can be divided into a plurality of heat exchange units,
The cooling system for a closed circulation refrigerant according to claim 1, wherein the plurality of heat exchange portions are arranged so as to surround the flowing water pipe. The heat exchanging unit has one cooling pipe through which the closed circulation refrigerant passes,
The cooling pipe has a meandering structure in which a plurality of arc-shaped portions formed by repeatedly bending the arc from one end and then turning back are arranged in the direction in which the flowing water pipe extends. The cooling device for the closed circulation refrigerant according to claim 2. The heat exchanging section has a plurality of cooling pipes that are curved in an arc shape, a rod-shaped introduction side pipe that is closed at both ends, and a rod-shaped discharge side pipe that is closed at both ends,
The introduction side pipe has an introduction part for introducing the closed circulation refrigerant,
The discharge side pipe has a discharge part for discharging the closed circulation refrigerant,
The plurality of cooling pipes are arranged between the introduction side pipe and the discharge side pipe, and the closed circulation refrigerant can flow through one end portion to the introduction side pipe and the other end portion to the discharge side pipe. The closed circulating refrigerant cooling device according to claim 2, wherein the cooling circuit is arranged in a direction in which the flowing water pipe extends. The generator is a water turbine generator;
5. The cooling system for a closed circulation refrigerant according to claim 1, wherein water for rotating a rotor of the water turbine generator flows in the flowing water pipe.

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