JP2015108476A - Cooling tower and geothermal heat generation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling tower which inhibits increase of a level of hot water in a condenser even when abnormality occurs.SOLUTION: A cooling tower 7 includes: an outlet 7M from which a coolant flows out; and a restriction member 21 which is provided so as to move relative to the outlet and may restrict outflow of the coolant from the outlet. The cooling tower restricts an amount of the coolant supplied to a condenser 6 positioned at a latter part. When it is determined that abnormality occurs in a pump 13 for sending hot water generated by the condenser to the cooling tower, the outflow of the coolant from the outlet of the cooling tower is restricted.

Description

  The present invention relates to a cooling tower and a geothermal power generation system.

  As a method of the geothermal power generation system, a steam power generation method and a binary power generation method are known. The steam power generation method is a method of generating power by directly supplying steam obtained from a production well to a turbine. The binary power generation method is a method in which hot water or steam obtained from a production well and a low boiling point medium are heat-exchanged with a heat exchanger to generate medium steam, and the steam is supplied to a turbine to generate power. .

  A steam-powered geothermal power generation system uses a condenser to condense steam that has worked in a turbine using cooling water into hot water (condensed water) and hot water supplied from the condenser using air or the like. And a cooling tower for cooling water. In geothermal power generation systems, direct contact condensers are often used as condensers. The direct contact condenser generates hot water by directly bringing cooling water from a cooling tower into contact with steam from a turbine. An example of a geothermal power plant including a direct contact condenser and a cooling tower is disclosed in Patent Document 1.

JP-A-11-030488

  In a steam power generation type geothermal power generation system, water circulates in a circulation system including a condenser and a cooling tower. Specifically, at least a part of the hot water of the condenser is supplied to the cooling tower, and at least a part of the cooling water of the cooling tower is supplied to the condenser. When an abnormality occurs that the balance between the amount of cooling water supplied from the cooling tower to the condenser and the amount of hot water flowing out of the condenser is lost, for example, when the amount of hot water in the condenser increases, The water level in the condenser may rise. As a result, the equipment around the condenser may be affected.

  An object of this invention is to provide the cooling tower and geothermal power generation system which can suppress the raise of the water level of a warm water in a condenser even when abnormality generate | occur | produces.

  The present invention provides a cooling tower comprising an outlet through which cooling water flows out and a restricting member that is provided so as to be movable with respect to the outlet and that can restrict the outflow of cooling water from the outlet.

  According to the present invention, since the restriction member capable of restricting the outflow of the cooling water from the outlet is provided, the cooling water supplied to the condenser is restricted by restricting the outflow of the cooling water when an abnormality occurs. The amount can be limited. Therefore, the rise in the water level of the hot water in the condenser can be suppressed.

  In the cooling tower according to the present invention, the restricting member may open and close the outlet. Thereby, when abnormality arises, supply of the cooling water with respect to a condenser can be stopped by closing an exit with a limiting member.

  In the cooling tower according to the present invention, at least a part of the cooling tower is disposed so as to face the outlet, and the first member has a first opening through which the cooling water can flow, and the first member is movable. A second member that opens and closes the first opening, and the restricting member may include the second member. Thereby, the outflow of the cooling water from the outlet can be limited only by moving the second member relative to the first member.

  In the cooling tower according to the present invention, the first member has a first surface disposed around the first opening, and the second member has a second opening through which the cooling water can flow, A second surface disposed around the second opening, wherein the second member is in a first state where the second opening coincides with the first opening, and the second opening is the first surface. The second surface may move so as to change from one of the second states facing the first opening to the other. Thereby, the 2nd member can restrict | limit the outflow of the cooling water from an exit with a small moving amount | distance.

  The cooling tower according to the present invention may be provided with a moving device that moves the second member in the vertical direction, and the second member is lowered to change from the first state to the second state. Thereby, when abnormality occurs, it is possible to quickly change from the first state to the second state. That is, even if the second member is a large member, the first opening can be quickly closed by the second member using the gravity action.

  The cooling tower which concerns on this invention WHEREIN: The upper end part of the said 1st member is arrange | positioned in the position lower than the water surface of the said cooling water, Between the said exit and the said 1st member, the said cooling water above the said exit You may provide the 3rd member arrange | positioned in a position lower than the water surface. Thereby, the space which an exit faces is substantially closed space by the 1st member and the 3rd member. Therefore, the time from when the first opening is closed by the second member to when all the cooling water in the closed space flows out from the outlet can be shortened.

  The present invention includes the cooling tower, a first pipe connected to an outlet of the cooling tower, cooling water supplied from the cooling tower via the first pipe, and steam supplied from a turbine. A condenser that performs heat exchange, a second pipe that connects the condenser and the cooling tower, and a hot water that is disposed in the second pipe and that is generated by the condenser is sent to the cooling tower. , An adjustment device capable of adjusting the supply amount of the cooling water supplied from the cooling tower to the condenser, and an outflow of the cooling water from the outlet when the pump is determined to be abnormal And a control device that controls the restriction member such that the restriction member is restricted.

  According to the present invention, the cooling water discharged from the cooling tower is supplied to the condenser via the first pipe, and the hot water discharged from the condenser is passed through the second pipe by the action of the pump. Supplied to the cooling tower. Moreover, the supply amount of the cooling water supplied from the cooling tower to the condenser can be adjusted by the adjusting device. A limiting member that can restrict the outflow of cooling water from the outlet is provided, so if a problem occurs in the pump and hot water is not supplied from the condenser to the cooling tower, the cooling water can be By limiting the outflow of water, the amount of cooling water supplied to the condenser can be limited. Therefore, the rise in the water level of the hot water in the condenser can be suppressed.

  The present invention provides a heat exchange between a cooling tower, a first pipe connected to an outlet of the cooling tower, cooling water supplied from the cooling tower via the first pipe, and steam supplied from a turbine. , A second pipe connecting the condenser and the cooling tower, and a pump arranged in the second pipe for sending the hot water generated by the condenser to the cooling tower And an adjustment device capable of adjusting the supply amount of the cooling water supplied from the cooling tower to the condenser, and the cooling tower to the condenser when it is determined that the pump is abnormal. There is provided a geothermal power generation system including a control device that controls the adjustment device so that water is not supplied.

  According to the present invention, the cooling water discharged from the cooling tower is supplied to the condenser via the first pipe, and the hot water discharged from the condenser is passed through the second pipe by the action of the pump. Supplied to the cooling tower. Since an adjustment device that can adjust the amount of cooling water supplied from the cooling tower to the condenser is installed, an abnormality occurs in the pump, and hot water is not supplied from the condenser to the cooling tower. In this case, the amount of cooling water supplied from the cooling tower to the condenser can be limited by the adjusting device. Therefore, the rise in the water level of the hot water in the condenser can be suppressed.

  The geothermal power generation system according to the present invention includes a detection device that detects abnormality of the pump, and the control device may determine whether or not the pump is abnormal based on a detection result of the detection device. Good. Thereby, it can be appropriately determined whether or not an abnormality has occurred in the pump.

  In the geothermal power generation system according to the present invention, in the state where the internal space of the condenser is adjusted to a pressure lower than atmospheric pressure, the cooling water and the steam are heat-exchanged in the internal space, and the condenser Has a flow path connecting the internal space and the external atmospheric pressure space, and a valve capable of opening and closing the flow path, and when the control device determines that the pump is abnormal, The valve may be controlled so that the space is opened. As a result, when cooling water is supplied from the cooling tower to the condenser via the first pipe using the pressure difference between the condenser and the condenser, the internal space is opened when an abnormality occurs in the pump. By increasing the pressure of the condenser, it is possible to suppress the supply of cooling water from the cooling tower to the condenser.

  According to the present invention, it is possible to suppress an increase in the level of warm water in the condenser even when an abnormality occurs.

FIG. 1 is a schematic configuration diagram illustrating an example of a geothermal power generation system according to the first embodiment. FIG. 2 is a schematic diagram showing a part of the geothermal power generation system according to the first embodiment. FIG. 3 is a schematic diagram illustrating an example of the operation of the adjustment device according to the first embodiment. FIG. 4 is a schematic diagram illustrating an example of the operation of the adjustment device according to the first embodiment. FIG. 5 is a schematic diagram illustrating an example of an adjusting device according to the second embodiment. FIG. 6 is a perspective view showing an example of the first member and the second member according to the second embodiment. FIG. 7 is a schematic diagram illustrating an example of the operation of the adjustment device according to the second embodiment. FIG. 8 is a perspective view illustrating an example of operations of the first member and the second member according to the second embodiment. FIG. 9 is a schematic diagram illustrating an example of an adjusting device according to the third embodiment. FIG. 10 is a perspective view illustrating an example of the first member and the second member according to the third embodiment. FIG. 11 is a schematic diagram illustrating an example of the operation of the adjustment device according to the third embodiment. FIG. 12 is a perspective view illustrating an example of operations of the first member and the second member according to the third embodiment. FIG. 13 is a schematic diagram illustrating an example of an adjusting device according to the fourth embodiment. FIG. 14 is a schematic diagram illustrating an example of the operation of the adjustment device according to the fourth embodiment. FIG. 15 is a schematic diagram illustrating an example of an adjusting device according to the fifth embodiment. FIG. 16 is a schematic diagram illustrating an example of the operation of the adjustment device according to the fifth embodiment. FIG. 17 is a schematic diagram showing a part of the geothermal power generation system according to the sixth embodiment. FIG. 18 is a schematic diagram showing a part of a geothermal power generation system according to the seventh embodiment.

  Hereinafter, embodiments according to the present invention will be described with reference to the drawings, but the present invention is not limited thereto. The requirements of the embodiments described below can be combined as appropriate. Some components may not be used.

<First Embodiment>
A first embodiment will be described. FIG. 1 is a schematic configuration diagram illustrating an example of a geothermal power generation system 1 according to the present embodiment. A geothermal power generation system 1 according to this embodiment is a steam power generation type geothermal power generation system that generates electricity by directly supplying steam G obtained from a production well 2 to a turbine (steam turbine) 3. Further, the geothermal power generation system 1 according to the present embodiment extracts a steam G from a gas-liquid two-phase geothermal fluid obtained from the production well 2 and supplies the extracted steam G to the turbine 3. Is a geothermal power generation system.

  As shown in FIG. 1, the geothermal power generation system 1 includes a steam / water separator 4 that extracts steam G from a gas / liquid two-phase geothermal fluid GW obtained from the production well 2, and steam extracted by the brackish water separator 4. A turbine 3 to which G is supplied; a generator 5 that operates by driving the turbine 3 to generate power; a condenser 6 that condenses the steam G that has worked in the turbine 3 to generate hot water (condensed water) HW; The cooling tower 7 cools the hot water HW supplied from the condenser 6 and generates the cooling water CW from the hot water HW.

  The production well 2 is a well for guiding the geothermal fluid GW in the geothermal reservoir deep in the ground to the ground surface and ejecting it. Hot water of high temperature and pressure exists in the geothermal reservoir. When excavating from the ground surface and making a hole in the geothermal reservoir, the hot water in the geothermal reservoir rises rapidly toward the surface. As the pressure rises, the pressure of the hot water decreases, and a portion of the hot water boils and becomes steam. As a result, a gas-liquid two-phase geothermal fluid GW in which hot water (liquid) and steam (gas) are mixed is collected on the ground surface.

  The steam separator 4 separates the geothermal fluid GW obtained from the production well 2 into hot water and steam G. That is, the steam separator 4 extracts hot water and steam G from the gas-liquid two-phase geothermal fluid GW. A silencer 8 is provided in the piping between the production well 2 and the steam separator 4. The steam G separated in the steam separator 4 is supplied to the turbine 3. The hot water separated in the steam / water separator 4 is supplied to the reduction well 9.

  The reduction well 9 is a well that reduces the hot water extracted by the steam separator 4 and a part of the cooling water CW of the cooling tower 7 deep into the ground. Thereby, depletion of the geothermal reservoir is suppressed. Moreover, it is suppressed that the toxic component contained in hot water is discharged | emitted on the ground.

  The turbine 3 is operated by the steam G from the steam separator 4. A mist separator may be provided between the steam separator 4 and the turbine 3, and the mist (liquid) in the vapor G may be removed in the mist separator. That is, when the steam / water separator 4 does not sufficiently separate the hot water and the vapor G and the vapor G contains a liquid component, the liquid component may be removed by a mist separator. The turbine 3 includes a turbine nozzle that blows out the steam G, and a turbine blade that rotates with the high-pressure steam G blown out from the turbine nozzle. When the turbine 3 is driven by the supplied steam G, the generator 5 operates and generates power.

  The condenser 6 condenses the steam G that has worked in the turbine 3 by using the cooling water CW to make the hot water HW. The condenser 6 is supplied with each of the cooling water CW from the cooling tower 7 and the steam G from the turbine 3. The condenser 6 performs heat exchange between the cooling water CW from the cooling tower 7 and the steam G from the turbine 3 to convert the steam G into hot water HW. In the present embodiment, the condenser 6 is a direct contact condenser that generates the warm water HW by directly bringing the cooling water CW from the cooling tower 7 into contact with the steam G from the turbine 3.

  A watering tower 10 is provided in the internal space 6S of the condenser 6. The cooling water CW supplied from the cooling tower 7 to the condenser 6 is sprayed from the sprinkler tower 10. The turbine 3 is adjacent to the condenser 6. The steam G that has worked in the turbine 3 is supplied to the internal space 6S of the condenser 6 and comes into contact with the cooling water CW sprayed from the sprinkler tower 10. Thereby, the vapor | steam G is condensed and the warm water HW is produced | generated. In the present embodiment, the hot water HW in the internal space 6 </ b> S of the condenser 6 includes the condensed water of steam G and the cooling water CW sprayed from the sprinkler tower 10.

  The cooling tower 7 cools the hot water HW generated by the condenser 6 into the cooling water CW. The cooling tower 7 cools the hot water HW using air, for example, and produces | generates the cooling water CW. The cooling tower 7 has an internal space 7S. The hot water HW supplied from the condenser 6 is sprayed from the upper part of the internal space 7S of the cooling tower 7. The sprayed hot water HW is cooled by coming into contact with air. A fan 14 is installed on the roof of the cooling tower 7. Gas such as water vapor generated in the cooling process is diffused upward into the atmosphere by the fan 14.

  In this embodiment, the geothermal power generation system 1 connects the cooling tower 7 and the condenser 6, the first pipe 11 through which the cooling water CW flowing out of the cooling tower 7 flows, the condenser 6, the cooling tower 7, and the like. And a second pipe 12 through which the hot water HW flowing out of the condenser 6 flows. At least a part of the cooling water CW of the cooling tower 7 is supplied to the condenser 6 via the first pipe 11. At least a part of the hot water HW of the condenser 6 is supplied to the cooling tower 7 via the second pipe 12. In this embodiment, a part of the cooling water CW of the cooling tower 7 is supplied to the reduction well 9 or discharged to a river or the like.

  In the present embodiment, the second pipe 12 is provided with a hot well pump 13. The hot well pump 13 operates to send the hot water HW generated by the condenser 6 to the cooling tower 7.

  In the present embodiment, the pressure in the internal space 6S of the condenser 6 is lower than the pressure in the internal space 7S of the cooling tower 7. In the present embodiment, the pressure in the internal space 7S of the cooling tower 7 is atmospheric pressure, and the pressure in the internal space 6S of the condenser 6 is lower than atmospheric pressure. In the present embodiment, the internal space 6S of the condenser 6 is adjusted to a vacuum state. With the internal space 6S of the condenser 6 adjusted to a pressure lower than the atmospheric pressure, the cooling water CW and the steam G are heat-exchanged in the internal space 6S of the condenser 6.

  The external space of the condenser 6 is an atmospheric space (atmospheric pressure space). The condenser 6 includes a pipe 15 having a flow path that connects the internal space 6S of the condenser 6 and an external space (atmospheric pressure space), and a valve (vacuum break valve) 16 that can open and close the flow path of the pipe 15. Have When the flow path of the pipe 15 is closed by the valve 16, the internal space 6S of the condenser 6 is maintained in a vacuum state. When the flow path of the pipe 15 is opened by the valve 16, the internal space 6S of the condenser 6 and the external space are connected, and the internal space 6S of the condenser 6 is opened (open to the atmosphere).

  FIG. 2 is a schematic diagram showing a part of the geothermal power generation system 1 according to the present embodiment. As shown in FIG. 2, the condenser 6 has an internal space 6S in which the hot water HW is generated, and an outlet 6M from which the hot water HW in the internal space 6S flows out. The cooling tower 7 has an internal space 7S in which the cooling water CW is generated, and an outlet 7M from which the cooling water CW in the internal space 7S flows out.

  Each of the first pipe 11 and the second pipe 12 connects the condenser 6 and the cooling tower 7. The first pipe 11 is connected to the outlet 7M of the cooling tower 7. The cooling water CW flowing out from the outlet 7M is supplied to the condenser 6 via the first pipe 11. The second pipe 12 is connected to the outlet 6M of the condenser 6. The hot water HW flowing out from the outlet 6M is supplied to the cooling tower 7 through the second pipe 12.

  The cooling tower 7 cools the hot water HW supplied from the condenser 6 via the second pipe 12 to generate the cooling water CW. The condenser 6 performs heat exchange between the cooling water CW supplied from the cooling tower 7 via the first pipe 11 and the steam G supplied from the turbine 3 to generate hot water HW. The condenser 6 directly contacts the cooling water CW sprayed from the sprinkler tower 10 and the steam G from the turbine 3 to generate hot water HW. The cooling tower 7, the first pipe 11, the condenser 6, and the second pipe 12 form a water (warm water HW and cooling water CW) circulation system.

  The pressure in the internal space 7S of the cooling tower 7 is atmospheric pressure, and the internal space 6S of the condenser 6 is adjusted to a vacuum state. Due to the pressure difference between the internal space 7S and the internal space 6S, the cooling water CW in the internal space 7S of the cooling tower 7 is supplied to the internal space 6S of the condenser 6 via the first pipe 11.

  The hot water HW in the internal space 6S of the condenser 6 is supplied to the internal space 7S of the cooling tower 7 through the second pipe 12 by the operation of the hot well pump 13 disposed in the second pipe 12.

  In the present embodiment, the geothermal power generation system 1 includes an adjustment device 20 that can adjust the supply amount of the cooling water CW supplied from the cooling tower 7 to the condenser 6, the adjustment device 20, the hot well pump 13, and the valve 16. And a control device 40 for controlling. In the present embodiment, the adjustment device 20 includes a limiting member 21 that is provided so as to be movable with respect to the outlet 7M of the cooling tower 7 and that can restrict the outflow of the cooling water CW from the outlet 7M.

  In the present embodiment, the adjusting device 20 is provided in the cooling tower 7. The cooling tower 7 includes a limiting member 21 and a moving device 22 that can move the limiting member 21. The limiting member 21 is disposed in the internal space 7S and is movable in the internal space 7S. The limiting member 21 includes a plate-shaped shutter member, and opens and closes the outlet 7M by moving (up and down) in the vertical direction.

  The moving device 22 includes a winch and includes a wire 221 connected to the restricting member 21 and a winding device 222 including an actuator capable of winding the wire 221. The moving device 22 is capable of moving the restricting member 21 in the vertical direction (movable up and down).

  3 and 4 are schematic diagrams illustrating an example of the operation of the adjustment device 20. As illustrated in FIG. 3, the restricting member 21 is raised by the moving device 22, thereby opening the outlet 7 </ b> M. Thereby, the cooling water CW in the internal space 7 </ b> S of the cooling tower 7 flows out from the outlet 7 </ b> M and is supplied to the condenser 6 through the first pipe 11. As illustrated in FIG. 4, when the restriction member 21 is lowered by the moving device 22, the outlet 7 </ b> M is closed by the restriction member 21. Thereby, the outflow of the cooling water CW from the outlet 7M is restricted, and the supply of the cooling water CW from the cooling tower 7 to the condenser 6 is stopped.

  In the present embodiment, the position of the limiting member 21 is adjusted so that the outlet 7M is opened when the hot well pump 13 is operating normally. In the present embodiment, when the hot well pump 13 is operating normally, the internal space 6S of the condenser 6 is lower than the atmospheric pressure (the pressure of the internal space 7S of the cooling tower 7) (this embodiment). In the form, the flow path of the pipe 15 is closed by the valve 16 in a state adjusted to a vacuum state). Thereby, the cooling water CW of the cooling tower 7 is supplied to the condenser 6 through the first pipe 11 due to the pressure difference between the internal space 6S of the condenser 6 and the internal space 7S of the cooling tower 7. At the same time, the hot water HW of the condenser 6 is supplied to the cooling tower 7 via the second pipe 12 by the operation of the hot well pump 13. In a state where the internal space 6S is adjusted to a pressure lower than the atmospheric pressure, the cooling water CW from the cooling tower 7 and the steam G from the turbine 3 are heat-exchanged in the internal space 6S.

  In the present embodiment, the water level (water surface position) of the cooling water CW in the internal space 7S of the cooling tower 7 is maintained constant, and the water level (water surface position) of the hot water HW in the internal space 6S of the condenser 6 is constant. So that the cooling water CW supplied from the cooling tower 7 to the condenser 6 per unit time and the hot water HW supplied from the condenser 6 to the cooling tower 7 per unit time are maintained. Each supply amount is adjusted. That is, the controller 40 maintains the hot well pump 13 so that the water level of the cooling water CW in the internal space 7S of the cooling tower 7 and the water level of the hot water HW in the internal space 6S of the condenser 6 are maintained constant. The supply amount of hot water HW per unit time supplied from the condenser 6 to the cooling tower 7 and the supply amount of cooling water CW per unit time supplied from the cooling tower 7 to the condenser 6 Adjust the balance.

  In the present embodiment, the control device 40 controls the adjustment device 20 so that the cooling water CW is not supplied from the cooling tower 7 to the condenser 6 when it is determined that the hot well pump 13 is abnormal. That is, when the control device 40 determines that the hot well pump 13 is abnormal, the control device 40 lowers the restricting member 21 so that the cooling water CW is not supplied from the cooling tower 7 to the condenser 6. Close outlet 7M. Thereby, the outflow of the cooling water CW from the internal space 7S of the cooling tower 7 is stopped, and the supply of the cooling water CW from the cooling water 7 to the condenser 6 is stopped.

  In this embodiment, the control device 40 controls the valve 16 so that the internal space 6S of the condenser 6 is opened (open to the atmosphere) when it is determined that the hot well pump 13 is abnormal. That is, when it is determined that the hot well pump 13 is abnormal, the control device 40 controls the valve 16 to open the flow path of the pipe 15. Opening the internal space 6S includes increasing the pressure in the internal space 6S to reduce the pressure difference between the internal space 6S and the internal space 7S.

  The abnormality of the hot well pump 13 means a state where the hot water HW of the condenser 6 is not supplied to the cooling tower 7 by the hot well pump 13 or a state where the supply amount of the hot water HW from the condenser 6 to the cooling tower 7 is reduced. Including. The abnormality of the hot well pump 13 includes at least one of malfunction and failure of the hot well pump 13. Further, when the hot well pump 13 is electrically operated, the abnormality of the hot well pump 13 includes a stop of power supply to the hot well pump 13.

  When the hot well pump 13 becomes abnormal and the hot water HW is not discharged from the condenser 6, the amount of the hot water HW in the condenser 6 increases. That is, in the present embodiment, the cooling water CW is supplied from the cooling tower 7 to the condenser 6 using the pressure difference between the internal space 6S and the internal space 7S. The hot water HW is discharged from the condenser 6 so that the water level of the hot water HW in the internal space 6S of the condenser 6 is maintained constant. When the hot well pump 13 becomes abnormal and the hot water HW is not discharged from the condenser 6, the amount of the hot water HW in the internal space 6 </ b> S of the condenser 6 by the cooling water CW supplied from the cooling tower 7. As a result, the water level of the hot water HW rises in the internal space 6S. In the present embodiment, the turbine 3 is arranged so as to be adjacent to the condenser 6. At least a part of the turbine 3 is disposed above the condenser 6. Therefore, when the water level of the hot water HW in the internal space 6S rises, the turbine 3 may come into contact with the hot water HW or be submerged in the hot water HW, which may adversely affect the turbine 3.

  In the present embodiment, the control device 40 controls the adjustment device 20 so that the cooling water CW is not supplied from the cooling tower 7 to the condenser 6 when it is determined that the hot well pump 13 is abnormal. Thereby, the raise of the water level of the warm water HW in the internal space 6S of the condenser 6 is suppressed.

  In the present embodiment, the control device 40 controls the valve 16 so that the internal space 6S of the condenser 6 is opened when it is determined that the hot well pump 13 is abnormal. As described above, in the present embodiment, the cooling water CW is supplied from the cooling tower 7 to the condenser 6 using the pressure difference between the internal space 6S and the internal space 7S. Accordingly, the cooling water CW from the cooling tower 7 to the condenser 6 is reduced by opening the internal space 6S and increasing the pressure in the internal space 6S to reduce the pressure difference between the internal space 6S and the internal space 7S. Supply is suppressed.

  That is, in the present embodiment, the control device 40 performs both the closing of the outlet 7M by the limiting member 21 and the reduction of the pressure difference between the internal space 6S and the internal space 7S, and the cooling tower 7 to the condenser 6 The supply of the cooling water CW to is stopped and the rise in the water level of the hot water HW in the condenser 6 is suppressed.

  In the present embodiment, when an abnormality occurs in the hot well pump 13, an abnormal signal (error signal) is output from the hot well pump 13 to the control device 40. The control device 40 can determine whether or not an abnormality has occurred in the hot well pump 13 based on the abnormality signal. The hot well pump 13 may include a discharge port that discharges the hot water HW and a sensor that can detect the amount of hot water HW discharged from the discharge port (discharge amount per unit time). When the abnormality of the hot well pump 13 occurs, the discharge amount of the hot water HW from the discharge port per unit time is reduced, or the discharge of the hot water HW from the discharge port is stopped. The sensor can detect a decrease in the discharge amount of the hot water HW from the discharge port or a stop of discharge of the hot water HW from the discharge port. The detection signal of the sensor is output to the control device 40. The control device 40 can determine whether or not an abnormality has occurred in the hot well pump 13 based on the detection result of the sensor.

  As described above, according to the present embodiment, since the limiting member 21 that can restrict the outflow of the cooling water CW from the outlet 7M is provided, an abnormality occurs in the hot well pump 13 and the condenser 6 When the situation where the hot water HW is not discharged occurs, the flow of the cooling water CW from the cooling tower 7 is limited using the limiting member 21, and the amount of the cooling water CW supplied from the cooling tower 7 to the condenser 6 is reduced. Can be limited. Therefore, the rise in the water level of the hot water HW in the condenser 6 can be suppressed.

  Further, in the present embodiment, the restricting member 21 is raised to open the outlet 7M when the hot well pump 13 is normal, and is lowered to close the outlet 7M when the hot well pump 13 is abnormal. Thereby, even if the restricting member 21 is a large member, the outlet 7M can be quickly closed by the restricting member 21 by dropping the restricting member 21 using the gravity action when the hot well pump 13 is abnormal. . The restricting member 21 may be lowered to open the outlet 7M when the hot well pump 13 is normal, and may be raised to close the outlet 7M when the hot well pump 13 is abnormal.

  In the present embodiment, the control device 40 controls the valve 16 so that the internal space 6S of the condenser 6 is opened when it is determined that the hot well pump 13 is abnormal. Thus, when the cooling water CW is supplied from the cooling tower 7 to the condenser 6 through the first pipe 11 using the pressure difference between the condenser 6 and the cooler 7, the hot well pump 13 is abnormal. Is generated, the internal space 6S of the condenser 6 is opened and the pressure difference between the internal space 6S of the condenser 6 and the internal space 7S of the cooler 7 is reduced. 6 can be prevented from being supplied with the cooling water CW.

  In the present embodiment, the control device 40 performs both the closing of the outlet 7M by the limiting member 21 and the reduction of the pressure difference between the internal space 6S and the internal space 7S, and the cooling tower 7 to the condenser 6 The supply of the cooling water CW to is stopped and the rise in the water level of the hot water HW in the condenser 6 is suppressed. When the hot well pump 13 is abnormal, the control device 40 does not have to open the internal space 6S by closing the outlet 7M with the restricting member 21. The same applies to the following embodiments.

Second Embodiment
A second embodiment will be described. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof is simplified or omitted.

  FIG. 5 is a schematic diagram illustrating an example of the adjustment device 20B according to the present embodiment. FIG. 5 shows the adjusting device 20B when the hot well pump 13 is operating normally. As shown in FIG. 5, the adjustment device 20B is arranged so that at least a part thereof faces the outlet 7M of the cooling tower 7, and includes a first member 31 having a first opening 31M through which the cooling water CW can flow, The second member 32 is provided so as to be movable with respect to the first member 31 and opens and closes the first opening 31. Each of the first member 31 and the second member 32 is disposed in the internal space 7 </ b> S of the cooling tower 7.

  FIG. 6 is a perspective view showing the first member 31 and the second member 32 when the hot well pump 13 is operating normally. As shown in FIGS. 5 and 6, the first member 31 is a plate-like member, and has a front surface 311 to which the outlet 7 </ b> M can face and a back surface 312 facing the opposite direction of the front surface 311. The first member 31 has a plurality of first openings 31M. The first opening 31M is a hole (through hole) formed so as to connect the front surface 311 and the back surface 312. The cooling water CW can pass through the first opening 31M. The surface 311 is disposed around the first opening 31M. The back surface 312 is disposed around the first opening 31M.

  The second member 32 is a plate-like member, and has a front surface 321 that can face the back surface 312 of the first member 31, and a back surface 322 that faces the opposite direction of the front surface 321. The second member 32 does not have a hole.

  The first member 31 is arranged to face the inner wall surface 7W of the cooling tower 7 arranged around the outlet 7M. The first member 31 is arranged to face the inner wall surface 7W with a gap in the internal space 7S. The lower end of the first member 31 is fixed to the bottom surface 7F of the cooling tower 7 and does not move. Moreover, the upper end part of the 1st member 31 is arrange | positioned above the water surface of the cooling water CW. Further, the side surface of the first member 31 is connected to the inner surface of the cooling tower 7. In the present embodiment, the circulation of the cooling water CW is suppressed around the first member 31. The cooling water CW can pass through the first opening 31M and cannot pass between the first member 31 and the cooling tower 7.

  The second member 32 is disposed in the internal space 7S and is movable in the internal space 7S. For example, the moving device 22B including a winch can move (elevate) the second member 32 in the vertical direction. The second member 32 opens and closes the first opening 31M by moving in the vertical direction.

  Next, an example of the operation of the adjustment device 20B according to this embodiment will be described. When the hot well pump 13 is operating normally, the position of the second member 32 is adjusted so that the first opening 31M opens. As illustrated in FIGS. 5 and 6, the second opening 32 is raised by the moving device 22 </ b> B, thereby opening the first opening 31 </ b> M. Thereby, at least a part of the cooling water CW in the internal space 7S of the cooling tower 7 passes through the first opening 31M, then flows out from the outlet 7M, and is supplied to the condenser 6 via the first pipe 11. The In the present embodiment, the cooling water CW on the back surface 312 side flows out from the outlet 7M after passing through the first opening 31M. On the other hand, the cooling water CW on the surface 311 side (the cooling water CW between the inner wall surface 7W and the surface 311) flows out from the outlet 7M without passing through the first opening 31M.

  Further, when the hot well pump 13 is operating normally, the flow path of the pipe 15 is closed by the valve 16 while the internal space 6S of the condenser 6 is adjusted to a pressure lower than the atmospheric pressure.

  FIG. 7 is a schematic diagram illustrating an example of the adjusting device 20B when it is determined that the hot well pump 13 is abnormal. FIG. 8 is a perspective view showing an example of the first member 31 and the second member 32 when it is determined that the hot well pump 13 is abnormal. As shown in FIGS. 7 and 8, when the control device 40 determines that the hot well pump 13 is abnormal, the control device 40 </ b> B prevents the cooling water CW from being supplied from the cooling tower 7 to the condenser 6. Control. That is, when the control device 40 determines that the hot well pump 13 is abnormal, the control device 40 lowers the second member 32 so that the cooling water CW is not supplied from the cooling tower 7 to the condenser 6, so that the second member 32 closes the first opening 31M. The moving device 22B lowers the second member 32 so that the front surface 321 of the second member 32 and the back surface 312 of the first member 31 are in contact with each other. Thereby, each of the plurality of first openings 31 </ b> M is closed by the second member 32.

  In the present embodiment, the outer peripheral surface of the first member 31 and the inner surface of the cooling tower 7 are connected, and the circulation of the cooling water CW between the first member 31 and the cooling tower 7 is suppressed. Therefore, when the first opening 31M is closed by the second member 32, the cooling water CW on the back surface 312 side in the internal space 7S is a space on the front surface 311 side (a space between the front surface 311 and the inner wall surface 7W). Can't move on. Therefore, the cooling water CW on the back surface 312 does not flow out from the outlet 7M. After the first opening 31M is closed by the second member 32, in the internal space 7S, the cooling water CW on the surface 311 side (cooling water CW between the inner wall surface 7W and the surface 311) flows out from the outlet 7M. . After the first opening 31M is closed by the second member 32, the cooling water CW flows out from the outlet 7M until the cooling water CW on the surface 311 side disappears.

  As described above, according to the present embodiment, the first member 31 having the first opening 31M and the second member 32 movable with respect to the first member 31 are provided, and the outer periphery of the first member 31 is provided. The outflow of the cooling water CW from the outlet 7M can be suppressed by closing the first opening 31M with the second member 32 in a state where the circulation of the cooling water CW is suppressed around the surface. In the present embodiment, the second member 32 functions as a limiting member that suppresses the outflow of the cooling water CW from the outlet 7M by closing the first opening 31M of the first member 31. According to the present embodiment, the outflow of the cooling water CW from the outlet 7M can be limited only by moving the second member 32.

  Also in this embodiment, when it is determined that the hot well pump 13 is abnormal, the internal space 6S of the condenser 6 may be opened (open to the atmosphere) or may not be opened.

<Third Embodiment>
A third embodiment will be described. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof is simplified or omitted.

  FIG. 9 is a schematic diagram illustrating an example of the adjusting device 20C according to the present embodiment. FIG. 9 shows the adjusting device 20C when the hot well pump 13 is operating normally. As shown in FIG. 9, the adjusting device 20 </ b> C is disposed so that at least a part thereof faces the outlet 7 </ b> M of the cooling tower 7, and includes a first member 31 having a plurality of first openings 31 </ b> M through which the cooling water CW can flow. The second member 32 </ b> C is provided so as to be movable with respect to the first member 31 and opens and closes the first opening 31. In the present embodiment, the second member 32C has a plurality of second openings 32M through which the cooling water CW can flow. Each of the first member 31 and the second member 32C is disposed in the internal space 7S of the cooling tower 7.

  FIG. 10 is a perspective view showing the first member 31 and the second member 32C when the hot well pump 13 is operating normally. As shown in FIGS. 9 and 10, the first member 31 is disposed around the first opening 31 </ b> M, the surface 311 to which the outlet 7 </ b> M can face, and the periphery of the first opening 31 </ b> M, opposite to the surface 311. And a back surface 312 facing in the direction. The first opening 31M is a hole (through hole) formed so as to connect the front surface 311 and the back surface 312.

  The second member 32C is disposed around the second opening 32M and can be opposed to the back surface 312 of the first member 31, and the back surface 322 is disposed around the second opening 32M and faces the opposite direction of the front surface 321. And have. The second opening 32M is a hole (through hole) formed so as to connect the front surface 321 and the back surface 322. The cooling water CW can pass through each of the first opening 31M and the second opening 32M.

  The first member 31 is arranged to face the inner wall surface 7W of the cooling tower 7 arranged around the outlet 7M. The first member 31 is arranged to face the inner wall surface 7W with a gap in the internal space 7S. The lower end of the first member 31 is fixed to the bottom surface 7F of the cooling tower 7 and does not move. Moreover, the upper end part of the 1st member 31 is arrange | positioned above the water surface of the cooling water CW. Further, the side surface of the first member 31 is connected to the inner surface of the cooling tower 7. In the present embodiment, the circulation of the cooling water CW is suppressed around the first member 31. The cooling water CW can pass through the first opening 31M and cannot pass between the first member 31 and the cooling tower 7.

  The second member 32C is disposed in the internal space 7S and is movable in the internal space 7S. For example, the moving device 22C including a winch can move (elevate) the second member 32C in the vertical direction. The second member 32C opens and closes the first opening 31M by moving in the vertical direction. The second member 32C can open the first opening 31M by adjusting the position of the second member 32C with respect to the first member 31 so that the first opening 31M and the second opening 32M coincide. The second member 32C can close the first opening 31M by adjusting the position of the second member 32C with respect to the first member 31 so that the second opening 32M is displaced from the first opening 31M.

  Next, an example of the operation of the adjustment device 20C according to this embodiment will be described. When the hot well pump 13 is operating normally, the position of the second member 32C is adjusted so that the first opening 31M opens. As shown in FIGS. 9 and 10, in the present embodiment, by adjusting the relative positions of the first member 31 and the second member 32 </ b> C, each of the plurality of first openings 31 </ b> M and the plurality of second openings are performed. Each of 32M can be matched. When the hot well pump 13 is operating normally, the position of the second member 32C relative to the first member 31 is adjusted by the moving device 22C so that the first opening 31M and the second opening 32M coincide. Thereby, the first opening 31M is opened, and at least a part of the cooling water CW in the internal space 7S of the cooling tower 7 passes through the first opening 31M and then flows out from the outlet 7M. It is supplied to the condenser 6. In the present embodiment, the cooling water CW on the back surface 321 side flows out from the outlet 7M after passing through the second opening 32M and the first opening 31M. On the other hand, the cooling water CW on the surface 311 side (the cooling water CW between the inner wall surface 7W and the surface 311) flows out from the outlet 7M without passing through the first opening 31M.

  Further, when the hot well pump 13 is operating normally, the flow path of the pipe 15 is closed by the valve 16 while the internal space 6S of the condenser 6 is adjusted to a pressure lower than the atmospheric pressure.

  FIG. 11 is a schematic diagram illustrating an example of the adjusting device 20C when it is determined that the hot well pump 13 is abnormal. FIG. 12 is a perspective view showing an example of the first member 31 and the second member 32C when it is determined that the hot well pump 13 is abnormal. As shown in FIGS. 11 and 12, the control device 40 controls the adjusting device 20C so that the cooling water CW is not supplied from the cooling tower 7 to the condenser 6 when it is determined that the hot well pump 13 is abnormal. Control. In this embodiment, when the control device 40 determines that the hot well pump 13 is abnormal, the controller 40 raises the second member 32C so that the cooling water CW is not supplied from the cooling tower 7 to the condenser 6, The second opening 32M is shifted with respect to the first opening 31M, and the first opening 31M is closed by the surface 321 of the second member 32C. The moving device 22C raises the second member 32C so that the front surface 321 of the second member 32C and the back surface 312 of the first member 31 are in contact with each other. Thereby, each of the plurality of first openings 31M is closed by the surface 321 of the second member 32C.

  In the present embodiment, the second opening 32M is closed at the back surface 312 of the first member 31 by raising the second member 32C.

  That is, in the present embodiment, the first member 31 has a back surface 312 disposed around the first opening 31M, and the second member 32C has a surface 321 disposed around the second opening 32M. ing. When it is determined that the hot well pump 13 is normal, the second member 32C is moved so that the second opening 32M is in the first state where it coincides with the first opening 31M. On the other hand, when it is determined that the hot well pump 13 is abnormal, the second member 32C has the second opening 32M opposed to the back surface 312 of the first member 31, and the front surface 321 of the second member 32C is the first opening 31M. And moved so as to be in the second state. In the second state, the second opening 32M faces the back surface 312 of the first member 31, whereby the second opening 32M is closed by the back surface 312 and the surface 321 of the second member 32C faces the first opening 31M. Thus, the first opening 31M is closed by the surface 321. Each of the first opening 31M and the second opening 32M is opened and closed by raising and lowering the second member 32C so as to change from one of the first state and the second state to the other.

  In the present embodiment, the moving device 22C is configured such that, in the first state, the lower end portion of the second member 32C contacts the floor surface 7F, and in the second state, the lower end portion of the second member 32 is separated from the floor surface 7F. This raises the second member 32C.

  As described above, also in the present embodiment, it is possible to limit the outflow of the cooling water CW from the outlet 7M by opening and closing the first opening 31M simply by raising and lowering the second member 32C. According to the present embodiment, the first opening 31M is provided in the first member 31, and the second opening 32M is provided in the second member 32C functioning as the limiting member. Therefore, from the first state in which the first opening 31M is opened, When changing to the 2nd state which closes the 1st opening 31M, the movement amount (rise amount) of the 2nd member 32C can be suppressed. Since the movement amount (rise amount) of the second member 32C can be reduced, the time required for the change from the first state in which the first opening 31M is open to the second state in which the first opening 31M is closed is shortened. Can do. Further, the structure of the moving device 22C can be simplified and the output of the moving device 22C can be reduced.

<Fourth embodiment>
A fourth embodiment will be described. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof is simplified or omitted.

  Each of FIG. 13 and FIG. 14 is a schematic diagram illustrating an example of the adjustment device 20D according to the present embodiment. FIG. 13 shows the adjusting device 20D when the hot well pump 13 is operating normally. FIG. 14 shows the adjusting device 20D when it is determined that the hot well pump 13 is abnormal. The adjusting device 20D according to the present embodiment is a modification of the adjusting device 20C described in the third embodiment.

  The adjusting device 20D is provided with a first member 31 having a plurality of first openings 31M through which the cooling water CW can flow, and a plurality of second members through which the cooling water CW can flow through the first member 31. And a second member 32D having an opening 32M.

  When the hot well pump 13 is operating normally, the position of the second member 32D relative to the first member 31 is adjusted by the moving device 22D so that the first opening 31M and the second opening 32M coincide. In the present embodiment, in the first state where the second opening 32M coincides with the first opening 31M, the lower end portion of the second member 32C is separated from the floor surface 7F.

  When it is determined that the hot well pump 13 is abnormal, the moving device 22D causes the second opening 32M to face the back surface 312 of the first member 31, and the surface 321 of the second member 32D to face the first opening 31M. In this way, the position of the second member 32D with respect to the first member 31 is adjusted. In the present embodiment, in the second state where the second opening 32M faces the back surface 312 of the first member 31, and the front surface 321 of the second member 32D faces the first opening 31M, the lower end of the second member 32D is , Contact the floor surface 7F.

  That is, in the present embodiment, the lower end portion of the second member 32D is separated from the floor surface 7F in the first state. When the second member 32D in the first state is lowered, the first state is changed to the second state. In the second state, the second member 32D is lowered by the moving device 22D so that the lower end portion of the second member 32D is in contact with the floor surface 7F.

  As described above, also in the present embodiment, it is possible to limit the outflow of the cooling water CW from the outlet 7M by opening and closing the first opening 31M simply by raising and lowering the second member 32D. According to the present embodiment, since the second member 32D is lowered when the first state of opening the first opening 31M is changed to the second state of closing the first opening 31M, the second member 32D is large. Even in the case of this member, when the hot well pump 13 is abnormal, the second member 32D is dropped using the gravitational action, whereby the outflow of the cooling water CW from the outlet 7M can be quickly limited.

<Fifth Embodiment>
A fifth embodiment will be described. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof is simplified or omitted.

  Each of FIG. 15 and FIG. 16 is a schematic diagram illustrating an example of the adjusting device 20E according to the present embodiment. FIG. 15 shows the adjusting device 20E when the hot well pump 13 is operating normally. FIG. 16 shows the adjusting device 20E when it is determined that the hot well pump 13 is abnormal. The adjustment device 20E according to the present embodiment is a modification of the adjustment device 20B described in the second embodiment.

  As shown in FIGS. 15 and 16, the adjusting device 20E is provided with a first member 31 having a plurality of first openings 31M through which the cooling water CW can circulate, and is movable with respect to the first member 31, And a second member 32 that opens and closes one opening 31M.

  The first member 31 is disposed so as to face the inner wall surface 7W of the cooling tower 7 disposed around the outlet 7M via a gap. In the present embodiment, the upper end portion of the first member 31 is disposed at a position lower than the water surface of the cooling water CW, and the lower end portion of the first member 31 is connected to the floor surface 7F of the cooling tower 7.

  In the present embodiment, the adjusting device 20E includes a third member 33 disposed between the outlet 7M and the first member 31 at a position above the outlet 7M and lower than the water surface of the cooling water CW. . The third member 33 is disposed so as to block the opening at the upper end of the space (space on the surface 311 side) 34 between the inner wall surface 7 </ b> W and the first member 31. The third member 33 is immersed in the cooling water CW of the cooling tower 7. The cooling water CW on the upper surface side of the third member 33 does not flow into the space 34 (the space between the inner wall surface 7 </ b> W, the first member 31, and the third member 33) 34 on the lower surface side of the third member 33. The space 34 is a part of the internal space 7S.

  As shown in FIG. 15, the first opening 31 </ b> M opens when the second member 32 rises. Thereby, the cooling water CW outside the space 34 in the internal space 7S flows out from the outlet 7M through the first opening 31M and the space 34. Further, the cooling water CW in the space 34 flows out from the outlet 7M.

  As shown in FIG. 16, the first opening 31M is closed when the second member 32 is lowered. Thereby, the cooling water CW outside the space 34 in the internal space 7S cannot flow into the space 34 and does not flow out from the outlet 7M.

  By closing the first opening 31M, the space 34 becomes a substantially closed space. After the first opening 31M is closed by the second member 32, the cooling water CW in the space 34 in the internal space 7S flows out from the outlet 7M. After the first opening 31M is closed by the second member 32, the cooling water CW flows out from the outlet 7M until the cooling water CW in the space 34 disappears.

  As described above, according to the present embodiment, since the third member 33 is provided, the space 34 facing the outlet 7M is substantially a closed space. Therefore, it is possible to shorten the time from when the first opening 31M is closed by the second member 32 until all the cooling water CW in the space 34 flows out from the outlet 7M.

  In the present embodiment, the third member 33 is added to the components described in the second embodiment. The third member 33 may be added to the components described in the third embodiment and the components described in the fourth embodiment.

<Sixth Embodiment>
A sixth embodiment will be described. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof is simplified or omitted.

  FIG. 17 is a schematic diagram illustrating an example of a geothermal power generation system 1F according to the present embodiment. The geothermal power generation system 1 </ b> F includes an adjustment device 20 </ b> F that is arranged in the first pipe 11 and that can adjust the supply amount of the cooling water CW supplied from the cooling tower 7 to the condenser 6. In the present embodiment, the adjusting device 20F includes a valve mechanism that can open and close the flow path of the first pipe 11. The adjusting device 20F is controlled by the control device 40.

  When it is determined that the hot well pump 13 is abnormal, the control device 40 controls the adjustment device 20F so that the cooling water CW is not supplied from the cooling tower 7 to the condenser 6.

  As described above, the first pipe 11 may be provided with the adjusting device 20 </ b> F that can adjust the supply amount of the cooling water CW supplied from the cooling tower 7 to the condenser 6.

<Seventh embodiment>
A seventh embodiment will be described. In the following description, the same or equivalent components as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof is simplified or omitted.

  FIG. 18 is a schematic diagram illustrating an example of a geothermal power generation system 1G according to the present embodiment. The geothermal power generation system 1 </ b> G includes a detection device 36 that detects an abnormality of the hot well pump 13. In the present embodiment, the detection device 36 is disposed in the second pipe 12. The detection result of the detection device 36 is output to the control device 40. The control device 40 may determine whether or not the hot well pump 13 is abnormal based on the detection result of the detection device 36.

  In the present embodiment, the detection device 36 can detect the amount of hot water HW discharged from the hot well pump 13 to the second pipe 12 (discharge amount per unit time). When the abnormality of the hot well pump 13 occurs, the discharge amount of the hot water HW discharged from the hot well pump 13 per unit time is reduced or the discharge of the hot water HW is stopped. The detection device 36 can detect a decrease in the discharge amount of the hot water HW from the hot well pump 13 or a stop of the discharge of the hot water HW. The control device 40 can determine whether an abnormality has occurred in the hot well pump 13 based on the detection result of the detection device 36. According to the present embodiment, the control device 40 can appropriately determine whether or not an abnormality has occurred in the hot well pump 13 based on the detection result of the detection device 36.

  In the above-described embodiments, the control device 40 of the geothermal power generation system 1 controls the adjustment device (20 or the like). The cooling tower 7 may include a control device, and an abnormal signal from the hot well pump 13 or a detection result of the detection device 36 may be output to the control device of the cooling tower 7. The control device of the cooling tower 7 may control the adjusting device (20 or the like). Further, as in the embodiment described with reference to FIG. 17, when the adjusting device 20 is not provided in the cooling tower 7, the control device of the cooling tower 7 may output a control signal to the adjusting device 20 </ b> F. Good.

  In each of the above-described embodiments, when it is determined that the hot well pump 13 is abnormal, the adjusting device (20 or the like) completely stops the supply of the cooling water CW from the cooling tower 7 to the condenser 6. (The discharge amount of the cooling water CW from the cooling tower 7 is set to zero). When it is determined that the hot well pump 13 is abnormal, the adjusting device (20 or the like) cools with a discharge amount smaller than the discharge amount of the cooling water CW from the cooling tower 7 when the hot well pump 13 is normal. Water CW may be discharged. In other words, the adjusting device (20 or the like) does not completely stop the supply of the cooling water CW from the cooling tower 7 to the condenser 6 even when it is determined that the hot well pump 13 is abnormal. The cooling water CW may be supplied with a supply amount smaller than the supply amount of the cooling water CW when the pump 13 is normal.

  Note that the above-described embodiments may be appropriately combined. For example, the geothermal power generation system supplies the cooling tower 7, the first pipe 11 connected to the outlet 7 </ b> M of the cooling tower 7, the cooling water supplied from the cooling tower 7 via the first pipe 11, and the turbine 3. The condenser 6 that exchanges heat with the steam generated, the second pipe 12 that connects the condenser 6 and the cooling tower 7, and the hot water that is arranged in the second pipe 12 and is generated by the condenser 6 It is determined that the hot well pump 13 for sending the water to the cooling tower 7, the adjusting device 20F capable of adjusting the supply amount of the cooling water supplied from the cooling tower 7 to the condenser 6, and the hot well pump 13 are abnormal. And a control device 40 that controls the restricting member 21 so that the outflow of the cooling water from the outlet 7M is restricted.

  The supply amount of the cooling water supplied from the cooling tower 7 to the condenser 6 can be adjusted by the adjusting device 20F. When an abnormality occurs in the hot well pump 13 and a situation occurs in which hot water is not supplied from the condenser 6 to the cooling tower 7, the condenser 6 is restricted by restricting the outflow of the cooling water using the restriction member 21. The amount of cooling water supplied to can be limited. Of course, the restriction member 21 may be used to restrict the outflow of the cooling water, and the adjustment device 20F may be used to restrict the supply of the cooling water from the cooling tower 7 to the condenser 6.

DESCRIPTION OF SYMBOLS 1 Geothermal power generation system 3 Turbine 4 Steam-water separator 5 Generator 6 Condenser 6S Internal space 7 Cooling tower 7M Outlet 7S Internal space 11 1st piping 12 2nd piping 13 Hot well pump 15 Piping 16 Valve 20 Regulator 21 Restriction Member 22 Moving device 31 First member 31M First opening 32 Second member 32M Second opening 33 Third member 34 Space 36 Detection device 311 Front surface 312 Back surface 321 Front surface 322 Back surface

Claims (10)

An outlet through which cooling water flows,
A cooling tower provided with a restricting member provided to be movable with respect to the outlet and capable of restricting the outflow of the cooling water from the outlet.   The cooling tower according to claim 1, wherein the restriction member opens and closes the outlet. A first member having a first opening that is arranged so that at least a part thereof faces the outlet and through which the cooling water can flow;
A second member provided movably with respect to the first member and opening and closing the first opening;
The cooling tower according to claim 1, wherein the limiting member includes the second member. The first member has a first surface disposed around the first opening,
The second member has a second opening through which the cooling water can flow, and a second surface disposed around the second opening,
The second member has a first state in which the second opening coincides with the first opening, and a second state in which the second opening faces the first surface and the second surface faces the first opening. The cooling tower according to claim 3, wherein the cooling tower moves so as to change from one of the states to the other. A moving device for moving the second member in the vertical direction;
The cooling tower according to claim 4, wherein the second member is lowered to change from the first state to the second state. The upper end of the first member is disposed at a position lower than the water surface of the cooling water,
6. The device according to claim 1, further comprising: a third member disposed between the outlet and the first member at a position lower than the water surface of the cooling water above the outlet. Cooling tower. The cooling tower according to any one of claims 1 to 6,
A first pipe connected to the outlet of the cooling tower;
A condenser that performs heat exchange between the cooling water supplied from the cooling tower via the first pipe and the steam supplied from the turbine;
A second pipe connecting the condenser and the cooling tower;
A pump arranged in the second pipe for sending the hot water generated by the condenser to the cooling tower;
An adjustment device capable of adjusting the supply amount of the cooling water supplied from the cooling tower to the condenser;
A geothermal power generation system comprising: a control device that controls the restriction member so that the outflow of the cooling water from the outlet is restricted when it is determined that the pump is abnormal. A cooling tower,
A first pipe connected to the outlet of the cooling tower;
A condenser that performs heat exchange between the cooling water supplied from the cooling tower via the first pipe and the steam supplied from the turbine;
A second pipe connecting the condenser and the cooling tower;
A pump arranged in the second pipe for sending the hot water generated by the condenser to the cooling tower;
An adjustment device capable of adjusting the supply amount of the cooling water supplied from the cooling tower to the condenser;
A geothermal power generation system comprising: a control device that controls the adjustment device so that the cooling water is not supplied from the cooling tower to the condenser when it is determined that the pump is abnormal. A detection device for detecting an abnormality of the pump;
The geothermal power generation system according to claim 8, wherein the control device determines whether or not the pump is abnormal based on a detection result of the detection device. With the internal space of the condenser adjusted to a pressure lower than atmospheric pressure, the cooling water and the steam are heat-exchanged in the internal space,
The condenser has a flow path connecting the internal space and an external atmospheric pressure space, and a valve capable of opening and closing the flow path,
The geothermal power generation system according to claim 9, wherein when the control device determines that the pump is abnormal, the control device controls the valve so that the internal space is opened.

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