JP2012193715A - Power generating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power generating device that can prevent air from mixing in a flow passage for a power generating medium.SOLUTION: Heat supply to a condenser is increased so that a pressure for the power generating medium on an outlet of the condenser, the pressure being the most negative pressure relative to the atmospheric pressure is made to be more positive pressure than the atmospheric pressure.

Description

  The present invention relates to a power generation apparatus including a condenser that cools a power generation medium flowing through a closed circulation channel with air.

Water is used as a medium, water is heated by a heat source, the turbine is rotated by steam generated, power is generated by a generator connected to the turbine, and the low-temperature steam discharged from the turbine is liquefied by a condenser and liquefied water There is known a power generation apparatus having a cycle for vaporizing the gas with the heat source. In the conventional power generator, water as a medium is brought into contact with the outside air, and the water itself is cooled by a cooling effect due to the heat of vaporization of water. For example, Patent Document 1 discloses a condenser, an air extractor, a condenser cooler, a circulating water pump that sends cooling water to the condenser cooler, an electric motor for the circulating water pump, and condenser cooling. And a control means for controlling the rotational speed of the circulating water pump in order to adjust the cooling capacity of the condenser.
As a cooling system different from the above-described cooling system in which water and outside air are brought into direct contact with each other, Patent Document 2 discloses that a steam exhausted from a steam turbine used for power generation or the like is discharged from a condenser through an exhaust pipe. In an air-cooled condenser that condenses steam by condensing steam by heat exchange with air introduced into the wind tunnel from an air inlet provided in the condenser body and led to the wind tunnel formed in the main body. An intake air cooler provided at the air inlet of the main body, a radiator connected to the intake air cooler via a cooling pipe for circulating the refrigerant and cooling the air flowing into the wind tunnel from the air inlet, and the intake air cooler An air-cooled condenser having a compressor that condenses the refrigerant returning to the radiator more is disclosed.

Japanese Patent Laid-Open No. 2003-343211 JP 2007-107814 A

  In the method of cooling water by directly contacting water and outside air as in Patent Document 1, since water evaporates, makeup water is necessary, and further, the scale is generated due to the concentration of water, so the water quality must be controlled. There was a point. As a cooling system that overcomes this problem, an air-cooled cooler as described in Patent Document 2 has been developed. However, in the method of cooling the steam that is the power generation medium with the air cooled by the intake air cooler as in Patent Document 2, in the cooler that cools the power generation medium gas, the outside air temperature of the power generation medium is low in winter. When the temperature drops below the boiling point, the power generation medium gas flow path has a negative pressure as compared with the atmosphere, and there is a problem that air is mixed in from the pipe connection portion of the power generation medium flow path.

  In order to solve the above-described problems, an object of the present invention is to provide a power generation device capable of preventing air from entering a power generation medium flow path.

  In order to solve the above problems, the inventor has reduced the amount of heat supplied to the condenser so that the power generation medium pressure on the condenser outlet side, which is the most negative pressure with respect to the atmospheric pressure, is more positive than the atmospheric pressure. I thought that it should be increased. Therefore, a power generation apparatus according to the present invention includes an evaporator that evaporates a power generation medium with the heat of a heat source fluid, a turbine that rotates with the power generation medium discharged from the evaporator, and a generator that is connected to the turbine. A condenser that cools and condenses the power generation medium discharged from the turbine with air, a pressure gauge that measures the pressure of the power generation medium discharged from the condenser, and a power generation discharge from the condenser A power generation device comprising a circulation pump for sending a medium to the evaporator and a control device for controlling the flow rate of the circulation pump, wherein the control device uses a predetermined pressure value equal to or higher than atmospheric pressure as a target pressure value, or A value obtained by adding a predetermined value to the atmospheric pressure is set as a target pressure value, and when the pressure value of the pressure gauge is higher than the target pressure value, the amount of heat supplied to the condenser is reduced, and the pressure gauge The pressure value is Is lower than the pressure value is a basic feature of increasing the heat supply amount to the condenser. As the heat source fluid, for example, geothermal water or factory exhaust heat can be used. The temperature of the heat supplied to the condenser is higher than the boiling point of the power generation medium.

  With such a configuration, it is possible to prevent the temperature of the power generation medium on the outlet side of the condenser from decreasing by increasing the amount of heat supplied to the condenser. Therefore, it is possible to avoid a situation in which the outlet side of the condenser becomes negative pressure from the atmospheric pressure because the amount of heat released is larger than the inflow heat amount in the condenser and the temperature of the power generation medium on the outlet side of the condenser is lower than the boiling point. .

  As one aspect of the above power generation device, in the power generation device having the basic characteristics, the control device is configured to generate power for the circulation pump when the pressure value of the pressure gauge is higher than the target pressure value. If the medium flow rate is decreased and the pressure value of the pressure gauge is lower than the target pressure value, the power generation medium flow rate of the circulation pump may be increased.

With such a configuration, it is possible to avoid a situation in which the condenser outlet side becomes a negative pressure from the atmospheric pressure, and it is easy to adjust the heat supply amount.
Moreover, as another aspect of said electric power generating apparatus, the 1st flow regulating valve is provided in piping which connects the said condenser inlet from the said turbine exit, The said control apparatus is a pressure value of the said pressure gauge, and the said target pressure value is provided. If it is higher, the valve opening of the first flow rate adjustment valve is decreased, and if the pressure value of the pressure gauge is lower than the target pressure value, the valve opening of the first flow rate adjustment valve is increased. Good.

With such a configuration, it is possible to avoid a situation in which the condenser outlet side becomes a negative pressure from the atmospheric pressure, and it is easy to adjust the amount of heat supplied to the condenser.
Further, as another aspect of the above power generation device, in the power generation device having the above basic characteristics, a bypass flow path connecting the condenser inlet to the turbine inlet is provided, and a second flow rate is provided in the bypass flow path. When the pressure value of the pressure gauge is higher than the target pressure value, the control device reduces the valve opening of the second flow rate adjustment valve, and the pressure value of the pressure gauge becomes the target pressure value. If it is lower, the valve opening of the second flow rate adjusting valve may be increased.

With such a configuration, it is possible to avoid a situation in which the condenser outlet side becomes a negative pressure from the atmospheric pressure, and it is easy to adjust the amount of heat supplied to the condenser.
Further, as another aspect of the above power generation device, in the power generation device having the basic characteristics, the condenser is heated by the heat source fluid having a temperature higher than the boiling point of the power generation medium at atmospheric pressure. It is more desirable. More specifically, in the power generation apparatus having the above characteristics, a first heating flow path is provided for heating the condenser by flowing the heat source fluid having a temperature higher than the boiling point of the power generation medium at atmospheric pressure. A heating pump is provided in the first heating channel, or a three-way valve is provided at a branch point where the heat source fluid is divided and flows into the first heating channel, and the control device includes the pressure gauge When the pressure value of the pressure gauge is higher than the target pressure value, the flow rate of the heat source fluid flowing through the first heating channel is reduced, and when the pressure value of the pressure gauge is lower than the target pressure value, The heating pump or the three-way valve may be controlled to increase the flow rate of the heat source fluid flowing through the one heating channel. At this time, it is more preferable to use a heat source fluid downstream from the evaporator as the heat source fluid flowing through the first heating channel. Furthermore, it is more desirable that the heated portion of the condenser is an outlet header portion of the condenser.

  With such a configuration, it is possible to avoid the situation where the condenser outlet side becomes a negative pressure from the atmospheric pressure, and when the heat of the heat source fluid after heating the power generation medium is used, the amount of power generation is The low-temperature exhaust heat that has been exhausted as it is can be used effectively without decreasing.

  Further, as another aspect of the above power generation device, in the power generation device having the above basic features, the heat source fluid that has flowed out of the evaporator and the circulation pump between the evaporator and the circulation pump. A second heating unit that includes a preheater for exchanging heat of the power generation medium, divides a part of the power generation medium from the preheater, and supplies the heat of the divided power generation medium to the condenser. A flow path is provided, and a third flow rate adjustment valve is provided in the second warming flow path, and the control device opens the second warming flow path when the pressure value of the pressure gauge is higher than the target pressure value. When the flow rate of the heat source fluid flowing is reduced and the pressure value of the pressure gauge is lower than the target pressure value, the flow rate of the heat source fluid flowing through the second heating channel is increased. The flow rate adjusting valve may be controlled.

With such a configuration, it is possible to avoid a situation in which the condenser outlet side becomes a negative pressure from the atmospheric pressure, and it is possible to increase the amount of heat that can be recovered from the heat source fluid because the preheater is provided.
More specifically, the second heating channel is a channel connecting the power generation medium outlet side of the preheater and the inlet side of the condenser, and the power generation medium heated by the preheater is , And may be supplied to the inlet side of the condenser. The second heating channel is a channel connecting the power generation medium outlet side of the preheater and the outlet header portion of the condenser, and the power generation medium heated by the preheater is condensed. You may make it supply to the exit header part of a container.

  ADVANTAGE OF THE INVENTION According to this invention, the electric power generating apparatus which can prevent that air mixes in the medium flow path for electric power generation can be provided.

1 is a configuration diagram according to a first embodiment of the present invention. It is a block diagram which concerns on the 2nd Embodiment of this invention. It is a block diagram which concerns on the 3rd Embodiment of this invention. It is a block diagram which concerns on the 4th Embodiment of this invention. It is a block diagram which concerns on the 5th Embodiment of this invention. It is a schematic block diagram of the condenser which concerns on the 5th Embodiment of this invention. It is a block diagram which concerns on the 6th Embodiment of this invention. It is a schematic block diagram of the condenser which concerns on the 6th Embodiment of this invention. It is a block diagram which concerns on the 7th Embodiment of this invention. It is a schematic block diagram of the condenser which concerns on the 7th Embodiment of this invention.

  Hereinafter, an embodiment of a power generator according to the present invention will be described with reference to the drawings. In addition, this invention is not limited to the following embodiment, In the range which does not change the summary, it can implement suitably.

  A first embodiment according to the present invention will be described with reference to the drawings. FIG. 1 is a main configuration diagram of the power generation device according to the first embodiment. Since FIG. 1 has a structure common to FIGS. 2 to 4, the same components are denoted by the same reference numerals, and redundant description is omitted.

  The heat source fluid flowing in from the heat source fluid inlet 1 flows through the evaporator 3 and the preheater 8 through the pipe, and is then discharged to the heat source fluid outlet 15. A flow meter 16 for measuring the flow rate of the heat source fluid and a thermometer 17 are installed in a pipe near the heat source fluid inlet 1. As a part through which the power generation medium flows, a circulation pump 7, a preheater 8, an evaporator 3, a turbine 4, and a condenser 6 are connected in an annular manner in order, and the space between the turbine 4 and the condenser 6 is connected. A pipe is provided with a thermometer 20 and a pressure gauge 21, and a pipe between the condenser 6 and the circulation pump 7 is provided with a thermometer 22 and a pressure gauge 23. In the preheater 8, the liquid power generating medium discharged from the condenser 6 is heated by the heat source fluid discharged from the evaporator 3. In addition, although the preheater 8 is not essential, if it is set as the structure provided with the preheater 8, the calorie | heat amount which can be collect | recovered from a heat source fluid can be increased.

  The liquid power generating medium preheated by the preheater 8 is vaporized by the evaporator 3, and the gaseous power generating medium is supplied to the turbine 4. A pipe connecting the evaporator 3 and the turbine 4 is provided with a thermometer and a pressure gauge for measuring the temperature and pressure of the vaporized power generation medium, respectively.

  The turbine 4 receives a force for moving the power generation medium from the high pressure side to the low pressure side due to a pressure difference between the high pressure generated in the evaporator 3 on the turbine inlet side and the low pressure generated on the condenser 6 on the turbine outlet side. Rotate. The rotating shaft of the turbine 4 is connected to the generator 5, and the generator 5 generates power by the rotation of the turbine 5. A rotational speed meter 25 for measuring the rotational speed of the turbine is installed. The output of the generator 5 is input to the power converter 30, and based on the commands of the control devices 40, 41, 42, 43, 44, 45, the DC power of a predetermined voltage, or the AC power of a predetermined voltage and frequency And output to the outside.

  The power generation medium discharged from the turbine 4 is introduced into the condenser 6. The condenser 6 is an air-cooled heat exchanger, and heat exchange is performed between the outside air and the power generation medium via a partition without supplying electric power from the outside. As a specific structure of the condenser 6, for example, a fin tube type heat exchanger is desirable.

  1, 2, 3, 4, 5, 7, and 9, the values of thermometers 17, 20, 22, 26, pressure gauges 21, 23, flow meter 16, and revolution meter 25 are These are inputted to the control devices 40, 41, 42, 43, 44, 45 and 46 through signal lines indicated by broken lines in the figure. In addition, these control devices output to the power converter 30 commands related to voltages and frequencies output from the power generation device to the outside. Furthermore, these control devices control the circulation pump 7 to adjust the flow rate of the power generation medium.

  In the control device 40 of the first embodiment shown in FIG. 1, the circulation pump is set so that the pressure of the pressure gauge 23 provided on the outlet side of the condenser 6 becomes the target pressure with a pressure slightly higher than the atmospheric pressure as the target pressure value. 7 is controlled. When the pressure of the pressure gauge 23 is higher than the target pressure, the flow rate of the circulation pump 7 is reduced according to the degree of deviation between the target pressure and the measured pressure. When the pressure of the pressure gauge 23 is lower than the target pressure, the target pressure and the measured pressure are measured. Control is performed to increase the flow rate of the circulation pump 7 in accordance with the degree of pressure divergence. When the upper limit value and the lower limit value are set so that the target pressure has a width, and the pressure of the pressure gauge 23 is higher than the target pressure upper limit value, the circulation pump 7 is set according to the degree of the difference between the target pressure and the actually measured pressure. When the flow rate is reduced and the pressure of the pressure gauge 23 is lower than the target pressure lower limit value, the flow rate of the circulation pump 7 may be controlled to increase in accordance with the degree of deviation between the target pressure and the actually measured pressure.

  FIG. 2 is a main configuration diagram of the power generation device according to the second embodiment. In 2nd Embodiment, in addition to the electric power generating apparatus of FIG. 1, the 1st flow regulating valve 19 is provided in the upstream piping of the condenser 6. FIG. The control device 41 controls the valve opening degree of the first flow rate adjusting valve 19 to adjust the flow rate of the power generation medium flowing into the condenser 6. During normal operation, the valve opening of the first flow rate adjustment valve 19 is not fully opened but is throttled by a predetermined opening. The control device 41 controls the valve opening degree of the first flow rate adjusting valve 19 so that the pressure of the pressure gauge 23 provided on the outlet side of the condenser 6 does not become lower than the atmospheric pressure. Specifically, the valve opening degree of the first flow rate adjusting valve 19 is controlled so that the pressure of the pressure gauge 23 becomes the target pressure with a pressure slightly higher than the atmospheric pressure as the target pressure value. When the pressure of the pressure gauge 23 is higher than the target pressure, control is performed so that the valve opening degree of the first flow rate adjustment valve 19 becomes a predetermined opening degree. When the pressure of the pressure gauge 23 is lower than the target pressure, control is performed so that the valve opening of the first flow rate adjustment valve 19 is opened from a predetermined opening according to the degree of deviation between the target pressure and the actually measured pressure. If the pressure of the pressure gauge 23 is lower than the target pressure even when the valve opening of the first flow rate adjustment valve 19 is fully open, the flow rate of the circulation pump 7 is controlled to increase.

  FIG. 3 is a main configuration diagram of the power generation device according to the third embodiment. In the third embodiment, in addition to the power generation device of FIG. 1, a bypass flow path 18 that communicates from the turbine inlet to the condenser inlet is provided, and the bypass flow path 18 is further provided with a second flow rate adjustment valve 20. . The control device 42 controls the valve opening degree of the second flow rate adjusting valve 20 to adjust the flow rate of the power generation medium flowing into the condenser 6 via the bypass flow path 18. During normal operation, the valve opening of the second flow rate adjustment valve 20 is fully closed. The control device 42 controls the valve opening degree of the second flow rate adjustment valve 20 so that the pressure of the pressure gauge 23 becomes the target pressure with a pressure slightly higher than the atmospheric pressure as the target pressure value. Specifically, when the pressure of the pressure gauge 23 is higher than the target pressure, the valve opening degree of the second flow rate adjustment valve 20 is controlled to be fully closed. When the pressure of the pressure gauge 23 is lower than the target pressure, control is performed so that the valve opening of the second flow rate adjustment valve 20 is opened according to the degree of deviation between the target pressure and the actually measured pressure.

  FIG. 4 is a main configuration diagram of the power generation device according to the fourth embodiment. In 4th Embodiment, in addition to the electric power generating apparatus of FIG. 1, the thermometer 26 is provided in the downstream of the evaporator 3. As shown in FIG. A first heating channel 31 is provided to partially branch the heat source fluid downstream from the evaporator 3 and supply heat of the branched heat source fluid to the condenser 6. A heating pump is provided in the first heating channel 31. 24. When the temperature of the thermometer 22 is lower than the temperature of the thermometer 26, the control device 43 controls the flow rate of the heating pump 24 and transfers heat to the condenser 6 via the first heating channel 31. The amount of heat supply is adjusted. During normal operation, the heating pump 24 is at rest. The control device 43 controls the flow rate of the heating pump 24 so that the pressure of the pressure gauge 23 becomes the target pressure with a pressure slightly higher than the atmospheric pressure as the target pressure value. Specifically, when the pressure of the pressure gauge 23 is higher than the target pressure, the flow rate of the heating pump 24 is set to zero. When the pressure of the pressure gauge 23 is lower than the target pressure, control is performed to increase the flow rate of the heating pump 24 according to the degree of deviation between the target pressure and the actually measured pressure. The heat source fluid after being used for heating is discharged to the heat source fluid outlet 15. When it is clear that the temperature of the thermometer 22 is lower than the temperature of the thermometer 26, the thermometer 26 may be omitted.

  FIG. 5 is a main configuration diagram of the power generation device according to the fifth embodiment. In the fifth embodiment, a thermometer 26 is provided on the downstream side of the evaporator 3 in addition to the power generator of FIG. The heat source fluid downstream from the evaporator 3 is partly branched, and the first heating channel 31 for supplying the heat of the branched heat source fluid to the condenser 6 is provided, and the heat source fluid channel 2 and the first heating flow are provided. A three-way valve 27 is provided at a branch point on the upstream side of the passage 31. It is more desirable to provide a preheater 8 between the evaporator 3 and the three-way valve 27 for exchanging heat between the power generation medium output from the circulation pump 7 and the heat source fluid output from the evaporator 3. The three-way valve 27 adjusts the flow rate distribution ratio of the heat source fluid flowing through the heat source fluid flow path 2 and the first heating flow path 31. When the temperature of the thermometer 22 is lower than the temperature of the thermometer 26, the control device 43 changes the flow rate distribution ratio of the three-way valve 27 to increase or decrease the flow rate to the first warming flow path 31. The supply amount of heat transferred to the condenser 6 via the heating channel 31 is adjusted. During normal operation, the flow rate distribution ratio of the three-way valve 27 is such that the flow rate to the first heating channel 31 is zero. More specifically, the control device 44 controls the flow rate distribution ratio of the three-way valve 27 so that the pressure of the pressure gauge 23 becomes the target pressure with a pressure slightly higher than the atmospheric pressure as the target pressure value. When the pressure of the pressure gauge 23 is higher than the target pressure, the flow rate distribution ratio of the three-way valve 27 is controlled so that the flow rate to the first warming flow path 31 decreases according to the degree of deviation between the target pressure and the actually measured pressure. When the pressure of the pressure gauge 23 is lower than the target pressure, the flow rate distribution ratio of the three-way valve 27 is controlled so that the flow rate to the first heating channel 31 increases according to the degree of deviation between the target pressure and the actually measured pressure. To do. When the upper limit value and the lower limit value are set so that the target pressure has a width, and the pressure of the pressure gauge 23 is higher than the target pressure upper limit value, the three-way valve 27 is set according to the degree of deviation between the target pressure and the actually measured pressure. When the pressure of the pressure gauge 23 is lower than the target pressure lower limit value, the flow rate distribution ratio is 3 according to the degree of deviation between the target pressure and the measured pressure. You may control the flow volume distribution ratio of the way valve 27 so that the flow volume to the 1st heating flow path 31 may increase. The heat source fluid after being used for heating is discharged to the heat source fluid outlet 15. When it is clear that the temperature of the thermometer 22 is lower than the temperature of the thermometer 26, the thermometer 26 may be omitted.

  FIG. 6 is a schematic configuration diagram of the condenser 6 in the fifth embodiment. The gaseous power generation medium is diverted to each heat exchange capillary 35 at the condenser inlet header 34, and is cooled by exchanging heat with air through the tube wall of the heat exchange capillary 35 in the course of flowing therethrough. Liquefy. Thereafter, the liquefied power generation medium is heat-exchanged with the warm heat source fluid in the first heating flow path 31 in the condenser outlet header portion 36, and the condenser outlet header portion 36 is heated. Thereafter, the liquefied power generation medium flows from the condenser outlet header portion 36 to the circulation pump 7.

  FIG. 7 is a main configuration diagram of the power generation device according to the sixth embodiment. In 6th Embodiment, in addition to the electric power generating apparatus of FIG. 1, the 2nd heating flow path 32 which connects the preheater 8 exit and the condenser exit header part 36 is provided. The second heating channel 32 includes a third flow rate adjustment valve 33, and the control device 45 controls the valve opening degree of the third flow rate adjustment valve 33 and passes through the second heating channel 32. Thus, the flow rate of the power generation medium flowing into the condenser 38 is adjusted. During normal operation, the valve opening of the third flow rate adjustment valve 33 is fully closed. The control device 45 controls the valve opening degree of the third flow rate adjustment valve 33 so that the pressure of the pressure gauge 23 becomes the target pressure with a pressure slightly higher than the atmospheric pressure as the target pressure value. Specifically, when the pressure of the pressure gauge 23 is higher than the target pressure, the valve opening degree of the third flow rate adjustment valve 33 is controlled to be fully closed. When the pressure of the pressure gauge 23 is lower than the target pressure, control is performed so that the valve opening degree of the third flow rate adjustment valve 33 is opened according to the degree of deviation between the target pressure and the actually measured pressure.

  FIG. 8 is a schematic configuration diagram of the condenser 38 in the sixth embodiment. The gaseous power generation medium is diverted to each heat exchange capillary 35 at the condenser inlet header 34, and is cooled by exchanging heat with air through the tube wall of the heat exchange capillary 35 in the course of flowing therethrough. Liquefy. Thereafter, the liquefied power generation medium is merged with the warm power generation medium in the second warming flow path 32 at the condenser outlet header portion 36, and the condenser outlet header portion 36 is heated. Thereafter, the liquefied power generation medium flows from the condenser outlet header portion 36 to the circulation pump 7.

  FIG. 9 is a main configuration diagram of the power generation device according to the seventh embodiment. In 7th Embodiment, in addition to the electric power generating apparatus of FIG. 1, the 2nd heating flow path 50 which connects the preheater 8 exit and the condenser inlet header part 34 of the condenser 39 is provided. The second heating channel 50 is provided with a third flow rate adjustment valve 33, and the control device 46 controls the valve opening degree of the third flow rate adjustment valve 33 and passes through the second heating channel 50. Thus, the flow rate of the power generation medium flowing into the condenser 39 is adjusted. During normal operation, the valve opening of the third flow rate adjustment valve 33 is fully closed. The control device 46 controls the valve opening degree of the third flow rate adjustment valve 33 so that the pressure of the pressure gauge 23 becomes the target pressure with a pressure slightly higher than the atmospheric pressure as the target pressure value. Specifically, when the pressure of the pressure gauge 23 is higher than the target pressure, the valve opening degree of the third flow rate adjustment valve 33 is controlled to be fully closed. When the pressure of the pressure gauge 23 is lower than the target pressure, control is performed so that the valve opening degree of the third flow rate adjustment valve 33 is opened according to the degree of deviation between the target pressure and the actually measured pressure.

  FIG. 10 is a schematic configuration diagram of the condenser 39 according to the seventh embodiment. The gaseous power generation medium flowing in from the turbine 4 is merged with the warm power generation medium in the second heating channel 50 at the condenser inlet header portion 34, and the temperature of the entire power generation medium passing through the condenser 39 is increased. To do. The mixed gaseous power generation medium is diverted to each heat exchange capillary 35 at the condenser inlet header section 34, and exchanges heat with air through the tube wall of the heat exchange capillary 35 in the course of flowing therethrough. Cool and liquefy. Thereafter, the liquefied power generation medium flows from the condenser outlet header portion 36 to the circulation pump 7.

DESCRIPTION OF SYMBOLS 1 Heat source fluid inlet 2 Heat source fluid flow path 3 Evaporator 4 Turbine 5 Generator 6, 38, 39 Condenser 7 Circulation pump 8 Preheater 15 Heat source fluid outlet 16 Flowmeter 17, 20, 22, 26 Thermometer 18 Bypass flow path 19 1st flow control valve 20 2nd flow control valve 21, 23 Pressure gauge 24 Heating pump 25 Revolution meter 27 Three-way valve 30 Power converter 31 1st heating flow path 32, 50 2nd heating flow path 33 Third flow regulating valve 34 Condenser inlet header 35 Heat exchange thin tube 36 Condenser outlet header 37 Fins 40, 41, 42, 43, 44, 45, 46 Control device

Claims (11)

An evaporator that evaporates the power generation medium with the heat of the heat source fluid;
A turbine rotating with a power generation medium discharged from the evaporator;
A generator connected to the turbine;
A condenser that cools and condenses the power generation medium discharged from the turbine with air;
A pressure gauge for measuring the pressure of the medium for power generation discharged from the condenser;
A circulation pump for sending the power generation medium discharged from the condenser to the evaporator;
A power generation device comprising a control device for controlling the flow rate of the circulation pump,
The control device is set with a predetermined pressure value equal to or higher than the atmospheric pressure as a target pressure value, or a value obtained by adding a predetermined value to the atmospheric pressure as a target pressure value, and the pressure value of the pressure gauge is the target pressure value. If the pressure value is higher than the value, the heat supply amount to the condenser is reduced, and if the pressure value of the pressure gauge is lower than the target pressure value, the heat supply amount to the condenser is increased. . The power generator according to claim 1,
When the pressure value of the pressure gauge is higher than the target pressure value, the control device reduces the power generation medium flow rate of the circulation pump, and when the pressure value of the pressure gauge is lower than the target pressure value, the circulation A power generation device characterized by increasing a flow rate of a power generation medium of a pump. The power generator according to claim 1,
A first flow rate adjusting valve is provided in a pipe connecting the condenser outlet to the turbine outlet;
When the pressure value of the pressure gauge is higher than the target pressure value, the control device reduces the valve opening of the first flow rate adjustment valve, and when the pressure value of the pressure gauge is lower than the target pressure value, A power generation device that increases a valve opening degree of the first flow rate adjusting valve. The power generator according to claim 1,
Providing a bypass passage connecting the condenser inlet from the turbine inlet;
A second flow rate adjusting valve is provided in the bypass channel;
When the pressure value of the pressure gauge is higher than the target pressure value, the control device reduces the valve opening of the second flow rate adjustment valve, and when the pressure value of the pressure gauge is lower than the target pressure value, A power generator that increases a valve opening degree of the second flow rate adjustment valve. The power generator according to claim 1,
The power generator is characterized in that the condenser is heated by the heat source fluid having a temperature higher than the boiling point of the power generation medium at atmospheric pressure. The power generator according to claim 5,
Providing a first heating passage for heating the condenser through the heat source fluid having a temperature higher than the boiling point of the power generation medium at atmospheric pressure;
A warming pump is provided in the first heating channel or a three-way valve is provided at a branch point where the heat source fluid is diverted and flows into the first heating channel;
When the pressure value of the pressure gauge is higher than the target pressure value, the control device reduces the flow rate of the heat source fluid flowing through the first heating channel, and the pressure value of the pressure gauge is set to the target pressure. When the value is lower than the value, the heating pump or the three-way valve is controlled so as to increase the flow rate of the heat source fluid flowing through the first heating channel. The power generator according to claim 5 or 6,
The power generation apparatus according to claim 1, wherein the heat source fluid flowing through the first heating flow path is a heat source fluid downstream of the evaporator. In the electric power generating apparatus as described in any one of Claim 5 thru | or 7,
The power generator is characterized in that a portion to be heated of the condenser is an outlet header portion of the condenser. The power generator according to claim 1,
A preheater for exchanging heat between the heat source fluid exiting from the evaporator and the power generating medium exiting from the circulation pump between the evaporator and the circulation pump;
Providing a second heating flow path for diverting a part of the power generation medium from the preheater and supplying heat of the diverted power generation medium to the condenser;
A third flow rate adjusting valve is provided in the second heating channel;
When the pressure value of the pressure gauge is higher than the target pressure value, the control device reduces the flow rate of the heat source fluid flowing through the second heating channel, and the pressure value of the pressure gauge is set to the target pressure. When it is lower than the value, the third flow rate adjusting valve is controlled so as to increase the flow rate of the heat source fluid flowing through the second warming flow path. The power generator according to claim 9,
The second heating channel is a channel connecting the power generation medium outlet side of the preheater and the inlet side of the condenser, and the power generation medium heated by the preheater is an inlet of the condenser A power generation device supplied to the side. The power generator according to claim 9,
The second heating flow path is a flow path connecting the power generation medium outlet side of the preheater and the outlet header portion of the condenser, and the power generation medium heated by the preheater is connected to the condenser. A power generation device that is supplied to an outlet header.

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