JP2004218953A - Device and method for regulating cooling water flow in condenser - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a condenser cooling water flow regulating device capable of stably supplying cooling water without relying upon a variation in liquid level difference in a condenser cooling device for cooling a condenser recycling turbine steam of a power generating plant. <P>SOLUTION: This condenser cooling water flow control device comprises an intake chamber liquid level gauge 22 fitted to an intake chamber 4 arranged continuously with an intake port 1 for taking cooling water from a condenser cooling device 10 with a condenser 9 of a steam turbine, a water release tank liquid level gauge 23 fitted to a cooling water release tank for releasing cooling water after cooling the condenser, and a control device 24 controlling the opening of a pump outlet valve 7 installed at the outlet of a cooling water supply pump 5 pumping up water from the water storage tank. The liquid levels in the intake tank 4 and at the water release port 18 are measured with the intake tank liquid level gauge 22 and the water release tank liquid level gauge 23, the liquid levels are inputted into the control device 24 to calculate a liquid level difference, and the flow of condenser cooling water is regulated by controlling the opening of the pump outlet valve 7. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a condenser cooling water flow rate adjusting device that adjusts a flow rate of cooling water flowing through a condenser cooling device installed for cooling a condenser of a steam turbine of a power generation facility.
[0002]
[Prior art]
In a power generation facility using a steam turbine, steam exhausted from the steam turbine is condensed in a condenser and reused as boiler feedwater. This turbine steam is heat-exchanged by a condenser attached to the turbine and becomes boiler feedwater. In many cases, seawater is used as a cooling medium for the condenser, and seawater (cooling water) is supplied to the condenser. ) Is provided with a condenser cooling device.
[0003]
FIG. 5 shows a configuration of a conventional condenser cooling device 50 when seawater is used as cooling water.
[0004]
Seawater is introduced into an intake tank 54 from an intake port 51 facing the open sea via an intake channel 52 and a screen 53. The seawater introduced into the intake tank 54 is supplied to a condenser 59 through a cooling water pipe 56 through a pump outlet valve 57 and a backwash valve 58 by a cooling water supply pump 55 installed in the intake tank 54. Then, heat exchange is performed with steam from the steam turbine T. The cooling water (seawater) used for the heat exchange passes through the backwash valve 58 again, passes through the condenser outlet valve 60, and is discharged from the water discharge tank 61 to the open sea.
[0005]
In the conventional condenser cooling device 50, the flow rate of the cooling water flowing through the condenser 59 is adjusted by the opening of the condenser outlet valve 60. The opening of the condenser outlet valve 60 is determined as follows. That is, the condenser outlet valve 60 is operated while checking the pump discharge pressure with the pressure gauge 62, and the rated flow rate of the condenser cooling water is obtained based on the pump flow rate-head characteristic curve (pump QH curve). The opening of the condenser outlet valve 60 is determined. However, in anticipation of an increase in pipe pressure loss due to aging such as the adhesion of marine organisms to the pipe or pipe corrosion, the condenser outlet valve 60 is set so that the cooling water flow rate is higher than the rated flow rate. The opening is adjusted.
[0006]
In particular, when a plurality of cooling water supply pumps 55 are installed in the water intake tank 54 as in the combined cycle power generation facility 70 shown in FIG. As a result, the level of the water intake surface of the water intake tank 54 tends to decrease. In such a case, the level difference from the water surface level of the water discharge tank 61 increases. That is, the flow rate of the cooling water supply pump 55 decreases due to the increase in the hydrostatic head required by the cooling water supply pump. Therefore, in consideration of the secular change of the pipe pressure loss and the decrease of the flow rate due to the increase of the hydrostatic head, it is necessary to adjust the opening degree of the condenser outlet valve 60 in advance so as to have a larger cooling water flow rate.
[0007]
Regarding the control of the water surface level of the water discharge tank when a plurality of conventional cooling water supply pumps are provided, a flow meter is provided downstream of each cooling water supply pump, and the cooling water supplied from each cooling water supply pump to the condenser is provided. There is a technique of controlling the water surface of a water discharge tank by measuring a water amount and a pressure and controlling the opening and closing of a water tank provided between the water discharge tank and the open sea according to the flow rate and the pressure (for example, see Patent Document 1). ).
[0008]
[Patent Document 1]
JP-A-6-82178
[Problems to be solved by the invention]
The relationship between the pump flow rate and the liquid level difference between the water intake tank and the water discharge tank will be described with reference to FIG.
[0010]
In FIG. 7, reference numeral 81 denotes a pump flow-head characteristic curve (pump QH curve). Reference numeral 82 denotes a pump flow rate-pressure characteristic curve when the liquid level difference is a certain value ΔH1. From the intersection of the pump QH curve 81 and the pump flow rate-pressure characteristic curve 82, the flow rate Q1 of the cooling water at the liquid level difference ΔH1 is obtained. Similarly, the flow rate Q2 of the cooling water at the liquid level difference ΔH2 is determined from the intersection of the pump flow rate-pressure characteristic curve 83 and the pump QH curve 81 when the liquid level difference is ΔH2.
[0011]
In FIG. 7, ΔH2> ΔH1. That is, the larger the liquid level difference ΔH between the water intake tank 4 and the water discharge tank 61, the smaller the cooling water flow rate discharged by the pump.
[0012]
Generally, the ratio of the hydrostatic head based on the liquid level difference is about 15% to 20% of the total pumping head of the condenser cooling device. Accordingly, as is apparent from the pump QH curve 81 in FIG. 7, the cooling water flow rate largely fluctuates due to the fluctuation of the water level of the intake tank. Therefore, there has been a need for a cooling water flow control device capable of stably supplying cooling water irrespective of fluctuations in the liquid level of the intake tank.
[0013]
In the condenser cooling device 50, the flow rate of the cooling water flowing through the condenser 59 is adjusted only by the condenser outlet valve 60. During the initial operation of the conventional condenser cooling device 50, the flow rate of the cooling water by the cooling water supply pump 55 is set to be relatively large. Therefore, in the case of the condenser cooling device 50 including the single cooling water supply pump 55, the excess flow operation was performed at the time of the initial operation. As a result, pump cavitation occurred and a large operating noise was generated at the condenser outlet valve 60.
[0014]
Further, when a plurality of cooling water supply pumps 55 are operated as in the combined cycle power generation equipment 70, the level of the water intake surface of the water intake tank 54 largely decreases due to an increase in the amount of cooling water used, so that the hydrostatic head increases. Thereby, the head of the cooling water supply pump 55 also increases. For this reason, the cooling water flow rate was further reduced.
[0015]
On the other hand, since marine organisms adhere to the cooling water pipe 56 due to continuous use, the pressure loss of the pipe increases over time. For this reason, the head of the cooling water supply pump 55 increases and the flow rate of the cooling water decreases, so that it becomes impossible to secure the required amount of condenser cooling water, and there is a problem that the performance of the power generation equipment is affected.
[0016]
Further, in Patent Document 1, the water level of the water discharge tank is controlled, but no consideration is given to the water level of the water intake tank.
[0017]
The present invention has been made in consideration of the above-described circumstances, and in a condenser cooling device that introduces cooling water for cooling a condenser, a fluctuation in a liquid level difference between an intake tank and a water discharge tank. It is an object of the present invention to provide a condenser cooling water flow rate adjusting device and an adjusting method capable of stably supplying cooling water regardless of the above.
[0018]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, a condenser cooling water flow rate adjusting device according to the present invention has an intake tank for storing cooling water for cooling a condenser of a steam turbine, as described in claim 1. A cooling water supply pump that guides cooling water from the water intake tank to the condenser, a cooling water supply pump outlet valve provided on an outlet side of the cooling water supply pump, and a cooling water supply pump provided on the condenser outlet side. A condenser outlet valve, and a condenser cooling water flow control device in a condenser cooling device comprising a water discharge tank from which cooling water after cooling the condenser is drained, provided in the water intake tank. A water tank level meter for measuring the amount of water stored in the tank, and a water tank level meter for measuring the amount of water provided in the water tank, wherein the water level meter for the water tank and the liquid level for the water tank are provided. The liquid level of the water intake tank and the water discharge tank from the measured values Determine the bell difference, based on the relationship between the difference between the liquid level and the opening of the cooling water supply pump outlet valve previously determined from the performance of the cooling water supply pump and the amount of cooling water required for the condenser. A control device for controlling an opening of the cooling water outlet pump is provided.
[0019]
According to a second aspect of the present invention, there is provided a condenser cooling water flow rate adjusting device according to the present invention for cooling the condensers of a plurality of steam turbines. A common intake tank for storing water, a plurality of cooling water supply pumps for guiding cooling water from the intake tank to the condenser, and a cooling water supply pump outlet valve provided on an outlet side of the cooling water supply pump. A condenser cooling device comprising a condenser outlet valve provided on the condenser outlet side and a common water discharge tank from which cooling water after cooling these condensers is drained. The water flow rate adjusting device further includes an intake tank liquid level meter provided in the water intake tank for measuring a water storage amount, and a water discharge tank liquid level meter provided in the water discharge tank for measuring the water storage amount. Water tank level meter and water tank level meter The liquid level difference between the intake tank and the water discharge tank is determined from the measured value, and the difference between the liquid level determined in advance from the performance of the cooling water supply pump and the amount of cooling water required for the condenser. A control device is provided for controlling the opening of the cooling water outlet pump based on the relationship with the opening of the cooling water supply pump outlet valve.
[0020]
In addition, the condenser cooling water flow rate adjusting device according to the present invention can solve the above-mentioned problem by providing the condenser cooling water flow rate adjusting apparatus according to claim 1 or 2 as described in claim 3. In the apparatus, the control device includes means for adjusting the opening of the cooling water supply pump outlet valve based on a pipe flow loss that increases with time in the condenser.
[0021]
On the other hand, the condenser cooling water flow rate adjusting device according to the present invention stores the cooling water for cooling the condenser of the steam turbine as described in claim 4 in order to solve the above-described problem. An intake tank, a cooling water supply pump that guides cooling water from the intake tank to the condenser, a cooling water supply pump outlet valve provided on an outlet side of the cooling water supply pump, and a condenser outlet side. The condenser cooling water flow rate adjusting method in the condenser cooling device comprising a condenser outlet valve provided and a water discharge tank from which cooling water after cooling the condenser is drained. The method of adjusting the cooling water flow rate includes the steps of measuring the liquid level of the water intake tank with a water level meter of the water intake tank, measuring the liquid level of the water discharge tank with the liquid level meter of the water discharge tank, Determining a liquid level difference between the cooling water supply pump and the cooling water supply pump. Calculating the opening of the cooling water supply pump outlet valve from the relationship between the liquid level difference determined from the performance of the condenser and the amount of cooling water required for the condenser and the opening of the cooling water supply pump outlet valve, Opening of the cooling water supply pump outlet valve based on information obtained in the step of obtaining the liquid level difference and the step of calculating the relationship between the liquid level difference and the opening of the cooling water supply pump outlet valve And a control step of controlling the following.
[0022]
According to a fifth aspect of the present invention, there is provided a condenser cooling water flow control device according to the present invention for cooling condensers of a plurality of steam turbines. An intake tank for storing water, a plurality of cooling water supply pumps for guiding cooling water from the intake tank to the respective condensers, a cooling water supply pump outlet valve provided on an outlet side of the cooling water supply pump, Condenser cooling water flow adjustment in a condenser cooling device comprising a condenser outlet valve provided on the condenser outlet side and a water discharge tank from which cooling water after cooling these condensers is drained. In the method, the condenser cooling water flow rate adjusting method includes a step of measuring a liquid level of an intake tank with an intake tank liquid level meter and a step of measuring a liquid level of the water discharge tank with a water discharge tank liquid level meter. To calculate the liquid level difference between the intake tank and the water discharge tank And the relationship between the liquid level difference determined in advance from the performance of the cooling water supply pump and the amount of cooling water required for the condenser and the opening of the cooling water supply pump outlet valve. The cooling based on information obtained in a step of calculating an opening, a step of calculating the liquid level difference, and a step of calculating a relationship between the liquid level difference and the opening of the cooling water supply pump outlet valve. And controlling the opening of the water supply pump outlet valve.
[0023]
Furthermore, in order to solve the above-mentioned problem, the condenser cooling water flow control device according to the present invention is configured such that the control step is a pipe that increases with time in the condenser. Adjusting the opening of the cooling water supply pump outlet valve based on the flow rate loss.
[0024]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of a condenser cooling water flow control device according to the present invention will be described below with reference to the drawings.
[0025]
FIG. 1 shows the configuration of a condenser cooling device provided with the condenser cooling water flow rate adjusting device of the present invention. The condenser cooling device 10 has an intake port 1 for taking in seawater, and an intake tank 4 connected to the intake port 1 via an intake channel 2 and a screen 3, and a cooling water supply pump 5 is installed in the intake tank 4. Is done. The seawater flows through the cooling water pipe 6 by the cooling water supply pump 5 and flows through the cooling water supply pump outlet valve 7 and the backwash valve 8 to the condenser 9 attached to the turbine T. The cooling water exchanged with the turbine steam flows through the outlet-side cooling water pipe 17, and is discharged from the water discharge tank 18 to the open sea through the backwash valve 8 and the condenser outlet valve 16. The opening of the condenser outlet valve 16 is initially set in advance.
[0026]
The condenser cooling device 10 is provided with a condenser cooling water flow control device for controlling the flow rate of the cooling water. The condenser cooling water flow rate adjusting device includes a water intake tank liquid level meter 22 installed in the water intake tank 4, a water discharge tank liquid level meter 23 installed near the water discharge tank 18, and a respective liquid level meter. And a control device 24 for inputting a signal from the controller and controlling the opening of the cooling water supply pump outlet valve 7.
[0027]
On the other hand, the control device 24 is configured as follows.
[0028]
First, the cooling water amount required by the target condenser is determined in advance with a certain range. Next, from the pump QH characteristic curve showing the pump performance represented by the curve 81 in FIG. Further, the valve opening is determined based on the flow rate characteristic curve of the cooling water supply pump outlet valve 7 shown in FIG. 2 from the amount of cooling water sucked by the pump and the amount of cooling water required by the condenser described above. Then, the relationship between the certain hydrostatic head H and the opening of the cooling water supply pump outlet valve 7 is stored in the control device 24 in advance as a function fx as shown in FIG. With such a configuration, when the liquid level difference ΔH is input to the control device 24, the flow rate of the cooling water flowing through the inlet-side cooling water pipe 6 is constantly changed based on the function fx. The opening of the cooling water supply pump outlet valve 7 is controlled so that the required amount of cooling water is obtained. In addition, the condenser outlet valve 16 is set so as to have a predetermined substantially fixed opening degree.
[0029]
FIG. 4 is a block diagram showing each step of outputting the opening of the cooling water supply pump outlet valve 7 from the liquid level difference ΔH performed in the control device 24.
[0030]
That is, in steps 31 and 32, the measured liquid level measured by the intake tank liquid level meter 22 and the water discharge tank liquid level meter 23 are input to the control device 24. Next, the liquid level difference ΔH between the two is calculated in step 33 from the measured value. Next, the data of the liquid level difference ΔH is used as the hydrostatic head H to be output from the cooling water supply pump 5, and is the relationship between the above-mentioned hydrostatic head H and the opening degree of the cooling water supply pump outlet valve fx. Is input to The optimum opening of the cooling water supply pump outlet valve 7 with respect to the hydrostatic head H (liquid level difference ΔH) is calculated in step 34 by this function fx and output. In step 35, the opening of the cooling water supply pump outlet valve 7 is controlled based on the output opening of the cooling water supply pump outlet valve 7. Although not shown, the control device 24 also outputs a signal for setting the condenser outlet valve 16 to a previously fixed opening.
[0031]
In addition, the function fx includes a process 36 for compensating for pressure loss generated in the piping during the flow of cooling water due to corrosive substances and marine organisms that adhere to and accumulate over the piping in the condenser over time. The adjustment value is input, and the opening of the cooling water supply pump outlet valve 7 calculated by the function fx from the liquid level difference ΔH can be adjusted.
[0032]
In the present embodiment, the cooling water is measured based on the data of the liquid level difference ΔH between the water level measured by the water level meter 22 and the liquid level difference measured by the water level meter 23. Although the opening degree of the supply pump outlet valve 7 is controlled, the function fx is set as follows, and the cooling water supply pump outlet valve 7 and the condenser outlet valve 16 are set based on the data of the liquid level difference ΔH. The opening degree of both may be controlled. That is, from the pump QH characteristic curve showing the pump performance shown by the curve 81 in FIG. 7, the cooling water flow rate of the pump with respect to a certain hydrostatic head H is obtained, and the cooling water amount drawn by the pump is determined in advance. From the amount of cooling water required by the condenser, the respective valve openings of the cooling water supply pump outlet valve 7 and the condenser outlet valve 16 are determined based on a flow characteristic curve as shown in FIG. At that time, the combination of the opening degrees of the respective valves increases, so that it is necessary to consider in advance the optimum combination of the opening degrees of the respective valves. Then, a function fx is created based on the combination of the opening degrees of the cooling water supply pump outlet valve 7 and the condenser outlet valve 16, and the certain hydrostatic head H, the opening degree of the cooling water supply pump outlet valve 7 and The relationship of the opening degree of the condenser outlet valve 16 is stored in the control device 24 in advance.
[0033]
The condenser cooling water flow control device having such a configuration can be installed in a combined cycle power generation facility 70 having a plurality of intake systems as shown in FIG.
[0034]
As described above, according to the condenser cooling water flow rate adjusting device according to the present invention, the level difference between the water tank liquid level and the discharge tank liquid level is measured, and the fluctuation of the liquid level difference is followed. Then, the opening of the cooling water supply pump outlet valve 7 is controlled to adjust the flow rate of the condenser cooling water. That is, it is possible to always supply a stable flow rate of the cooling water to the condenser 9 irrespective of the fluctuation of the liquid level, so that the performance of the power generation equipment can be stabilized.
[0035]
Further, since the condenser cooling water flow rate adjusting device allows the cooling water to flow at a stable flow rate even during the initial operation of the power generation equipment, the cooling water supply pump 5 does not operate in an excessive flow rate. Therefore, pump cavitation is prevented, and noise during plant operation is effectively suppressed. In particular, since the flow rate of the cooling water is adjusted at two points, that is, the cooling water supply pump outlet valve 7 and the condenser outlet valve 16, noise at the condenser outlet valve 16 is reduced as compared with the related art.
[0036]
Further, according to the condenser cooling water flow rate adjusting device, the control device 24 adds the aging piping pressure loss with respect to the aging of the piping pressure loss due to marine organisms adhering to the cooling water piping 6 and pipe corrosion. By performing the adjustment, it is possible to incorporate and control the fluctuation of the liquid level difference. Therefore, it is possible to stably maintain the flow rate of the cooling water during long-term operation of the power generation equipment.
[0037]
【The invention's effect】
As described above, according to the condenser cooling water flow rate adjusting device and the adjusting method according to the present invention, the opening degree of the pump outlet valve is adjusted by following the fluctuation of the liquid level difference between the intake tank and the water discharge tank. Therefore, the cooling water can always be supplied at a stable flow rate.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a condenser cooling device provided with a cooling water flow control device according to the present invention.
FIG. 2 is a flow characteristic curve of a pump outlet valve.
FIG. 3 is a function fx curve for determining an opening of a pump outlet valve.
FIG. 4 is a control block diagram in the condenser cooling water flow rate adjusting device of the present invention.
FIG. 5 is a configuration diagram showing a conventional condenser cooling device.
FIG. 6 is a structural diagram showing a configuration near an intake tank of a combined power generation facility including a condenser cooling device unit.
FIG. 7 is a graph showing a correlation between a pump QH curve and a flow rate-pressure curve.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Intake port 2 Intake channel 3 Screen 4 Intake tank 5 Cooling water supply pump 6 Inlet side cooling water pipe 7 Cooling water supply pump outlet valve 8 Backwash valve 9 Condenser 10 Condenser cooling device 16 Condenser outlet valve 17 Outlet-side cooling water drainage pipe 18 Water discharge tank 22 Water intake tank liquid level meter 23 Water discharge tank liquid level meter 24 Controller 31 Step of measuring liquid level of water intake tank 32 Step of measuring liquid level of water discharge tank 33 Liquid Step 34 of calculating surface level difference Step 35 of calculating the opening of the cooling water supply pump outlet valve Step 35 of controlling the opening of the cooling water supply pump outlet valve Step 36 of adjusting the increase in the pressure loss over time in the pipe 50 Condenser cooling device (conventional)
51 intake port 52 intake channel 53 screen 54 intake tank 55 cooling water supply pump 56 cooling water piping 57 cooling water supply pump outlet valve 58 backwash valve 59 condenser 60 condenser outlet valve 61 water discharge tank 62 pressure gauge 70 combined cycle Power generation equipment 81 Pump QH curve 82 Pump flow-pressure characteristic curve (ΔH1)
83 Pump flow-pressure characteristic curve (ΔH2)

Claims (6)

An intake tank for storing cooling water for cooling the condenser of the steam turbine, a cooling water supply pump for guiding cooling water from the intake tank to the condenser, and an outlet side of the cooling water supply pump. A cooling water supply pump outlet valve, a condenser outlet valve provided on the condenser outlet side, and a water discharge tank from which cooling water after cooling the condenser is discharged. In the condenser cooling water flow control device in the device,
An intake tank liquid level meter provided in the water intake tank to measure the amount of water storage, and a water discharge tank liquid level meter provided in the water discharge tank to measure the amount of water storage, wherein the water intake tank liquid level meter and The liquid level difference between the intake tank and the water discharge tank is obtained from the measured value measured by the water tank liquid level meter, and the performance of the cooling water supply pump and the amount of cooling water required for the condenser are determined in advance. A condenser for controlling an opening degree of the cooling water outlet pump based on a relationship between the obtained difference in the liquid level and an opening degree of the cooling water supply pump outlet valve. Water flow control device. A common intake tank for storing cooling water for cooling the condensers of the plurality of steam turbines, a plurality of cooling water supply pumps for guiding cooling water from the intake tank to the condenser, A cooling water supply pump outlet valve provided on the outlet side of the supply pump, a condenser outlet valve provided on the condenser outlet side, and a common drainage of cooling water after cooling these condensers. In the condenser cooling water flow control device in the condenser cooling device consisting of a water discharge tank,
An intake tank liquid level meter provided in the water intake tank to measure the amount of water storage, and a water discharge tank liquid level meter provided in the water discharge tank to measure the amount of water storage, wherein the water intake tank liquid level meter and The liquid level difference between the intake tank and the water discharge tank is obtained from the measured value measured by the water tank liquid level meter, and the performance of the cooling water supply pump and the amount of cooling water required for the condenser are determined in advance. A condenser for controlling an opening degree of the cooling water outlet pump based on a relationship between the obtained difference in the liquid level and an opening degree of the cooling water supply pump outlet valve. Water flow control device. 3. The condenser cooling water flow control device according to claim 1, wherein the control device adjusts the cooling water supply pump outlet valve opening based on a pipe flow loss that increases with time in the condenser. 4. A condenser cooling water flow rate adjusting device comprising an adjusting means. An intake tank for storing cooling water for cooling the condenser of the steam turbine, a cooling water supply pump for guiding cooling water from the intake tank to the condenser, and an outlet side of the cooling water supply pump. A cooling water supply pump outlet valve, a condenser outlet valve provided on the condenser outlet side, and a water discharge tank from which cooling water after cooling the condenser is discharged. In the condenser cooling water flow adjustment method in the device,
This condenser cooling water flow rate adjustment method includes a step of measuring the liquid level of the water intake tank with a liquid level meter of the water intake tank, a step of measuring the liquid level of the water discharge tank with the liquid level meter of the water discharge tank, A step of determining a liquid level difference between a water tank and a water discharge tank; and a liquid level difference previously determined from the performance of the cooling water supply pump and the amount of cooling water required for the condenser, and the cooling water supply pump outlet valve. Calculating the opening of the cooling water supply pump outlet valve from the relationship with the opening; calculating the liquid level difference; and calculating the relationship between the liquid level difference and the cooling water supply pump outlet valve opening. Controlling a degree of opening of the cooling water supply pump outlet valve based on the information obtained in the step (a). An intake tank for storing cooling water for cooling the condensers of the plurality of steam turbines, a plurality of cooling water supply pumps for guiding the cooling water from the intake tank to the condensers, A cooling water supply pump outlet valve provided on the outlet side of the pump, a condenser outlet valve provided on the condenser outlet side, and a water discharge tank for discharging cooling water after cooling the condenser In the condenser cooling water flow rate adjusting method in the condenser cooling device comprising:
This condenser cooling water flow rate adjustment method includes a step of measuring the liquid level of the water intake tank with a liquid level meter of the water intake tank, a step of measuring the liquid level of the water discharge tank with the liquid level meter of the water discharge tank, A step of determining a liquid level difference between a water tank and a water discharge tank; and a liquid level difference previously determined from the performance of the cooling water supply pump and the amount of cooling water required for the condenser, and the cooling water supply pump outlet valve. Calculating the opening of the cooling water supply pump outlet valve from the relationship with the opening; calculating the liquid level difference; and calculating the relationship between the liquid level difference and the cooling water supply pump outlet valve opening. Controlling a degree of opening of the cooling water supply pump outlet valve based on the information obtained in the step (a). 6. The condenser cooling water flow rate adjusting method according to claim 4 or 5, wherein the control step adjusts the cooling water supply pump outlet valve opening based on a pipe flow loss that increases with time in the condenser. A method for adjusting a condenser cooling water flow rate, comprising a step of adjusting.

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