JP2002081676A - Air conditioning system utilizing steam turbine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively utilize vapor inputted into a steam turbine in an air conditioning system utilizing the steam turbine. SOLUTION: An air conditioning system utilizing a steam turbine includes a steam turbine 1, and a condenser 2 for converting steam reduced in pressure in the steam turbine to water. In the condenser, vapor guided from the steam turbine and condensed cooling water are heat exchanged. The condensed cooling water is circulated through condensed water cooling systems 12, 13. In the condensate cooling water system, a heat dissipation heat exchanger 4 is provided. There are further provided air conditioning pipe lines 10, 11 that are branched from the condensate cooling water system for supplying the condensate cooling water to an air conditioned load. In the heat dissipation heat exchanger, there are heat exchanged the condensate cooling water and the heat dissipation cooling water returned from the condenser. A control device 21 controls the flow rate of the heat dissipation cooling water by changing the opening of a control valve 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning system using a steam turbine, and more particularly to an air conditioning system using a steam turbine, which is suitable for using heat exchanged by a condenser for a heating load.

[0002]

2. Description of the Related Art In a conventional steam turbine facility, as shown in Japanese Patent Application Laid-Open No. 5-222905, exhaust gas from a steam turbine is cooled and condensed by cooling water flowing through a heat transfer tube in a condenser. . This cooling water is supplied to the process in order to recover the heat of the heated cooling water. Specifically, the temperature of the hot water supplied to the process is controlled by mixing hot water cooled by the cooling tower and hot water that is not cooled in the lower water tank of the cooling tower at a high load. When the load is low, the amount of steam extracted from the bleed air system into the condenser is controlled so as to increase the amount of steam to be cooled and condensed.

[0003] In addition, the report of the Cogeneration Overseas Mission '93, published by the Japan Society for the Study of Cogeneration '93, pages 36-39 (January 1994), states that the cooling water of the condenser of the steam turbine equipment is used for district cooling and heating. It is described that it is used as hot water.

[0004]

The above-mentioned publication has an advantage that heat energy can be effectively recovered by supplying cooling water flowing through a condenser to a process.
No consideration is given to air conditioning of a demand source supplied with power from a steam turbine facility. That is, some air conditioning equipment is required even at the demand source that is supplied with power from the steam turbine equipment.Conventionally, for this purpose, energy is supplied from a heat source different from that of the steam turbine, for example, an air conditioner using a compressor or an absorption type. It was used for air conditioning with a refrigerator. As a result, an extra heat source is required for air conditioning, despite the fact that there is still enough energy available for air conditioning at the exit side of the steam turbine.

Further, although it is known that hot water can be used for air conditioning in the above-mentioned report, no consideration is given to controlling the hot water in accordance with seasonal fluctuations and the like.

The present invention has been made in view of the above-mentioned disadvantages of the related art, and an object of the present invention is to effectively use steam input to a steam turbine for air conditioning. It is another object of the present invention to efficiently distribute the energy of steam input to a steam turbine to air conditioning and power generation.

[0007]

A first feature of the present invention to achieve the above object is a steam turbine, a condenser for converting steam depressurized by the steam turbine into water, and a condenser Condensate cooling water, which exchanges heat with steam guided from the steam turbine, circulates, and is provided with a condensate cooling water system having a heat exchanger for heat radiation. An air-conditioning pipe for supplying cooling water is provided.The heat-radiating heat exchanger exchanges heat between the condensed cooling water returned from the condenser and the cooling water for cooling, and controls the flow rate of the cooling water for cooling. Has been established.

In this aspect, the air conditioning pipeline may be provided with a detecting means for detecting the air conditioning load, and the control device may control the flow rate of the cooling water for radiation in accordance with the air conditioning load detected by the detecting means. . Further, when a power generation means is connected to the steam turbine, and the power generation amount of the power generation means is prioritized, the control device may control to increase the flow rate of the cooling water for cooling and to lower the temperature of the condensed cooling water. .

A second feature of the present invention to achieve the above object is that a steam turbine, a condenser through which steam depressurized by the steam turbine is led, a generator connected to the steam turbine, and a condenser Condensate cooling water system that circulates condensate cooling water that exchanges heat with the steam led to the heat exchanger, a heat radiation heat exchanger interposed in the condensate cooling water system, and a heat radiation heat exchanger A control valve for controlling the amount of cooling water for heat dissipation, an air conditioning load pipe branching off from the condensate cooling water system and supplying condensed cooling water to the air conditioning load, and a condensate flowing through the air conditioning load pipe. Load temperature detecting means for detecting the cooling water temperature, condensed cooling water temperature detecting means for detecting the condensed cooling water temperature flowing through the condensed cooling water system, load temperature detected by the load temperature detecting means and condensed water cooling Opening of the control valve according to the condensed cooling water temperature detected by the water temperature detecting means It is obtained by a controller for controlling the.

[0010]

FIG. 1 shows one embodiment of the present invention. FIG. 1 is a system diagram of an air conditioning system using a steam turbine. High-pressure steam generated by a steam generator (not shown) is guided to the steam turbine 1 through a high-pressure steam pipe 6. A generator 24 is connected to the steam turbine 1 via a coupling (not shown). The power generated by the generator 24 is sent to the power demand source 16 by the power supply wiring 15. The heat energy of the steam is converted into rotational energy in the steam turbine 1, and the rotational energy is converted into electric energy in the generator 24.

The steam reduced in pressure in the steam turbine 1 is guided to the condenser 2 through a low-pressure steam pipe 7. In condenser 2,
The cooling water circulating through the cooling water pipes 12 and 13 is guided and exchanges heat with steam from the steam turbine 1 to condense the steam.
The condensate condensed in the condenser 2 is sent to the steam generator by the condensate pump 3 interposed in the condensate pipe 8.

A part of the cooling water whose temperature has been raised in the condenser 2 is sent to a power demand source 16 as an air conditioning load by a hot water supply pipe 11 branched from the middle of the condenser cooling water outlet pipe 12. Air conditioner 16 is air-conditioned. The cooling water that has been air-conditioned is returned to the condenser cooling water outlet pipe 12 via the hot water return pipe 10. The hot water supply pipe 11 is provided with a hot water supply pump 25 to supply cooling water to a power demand source.

The cooling water heated in the condenser 2 is sent to the heat-radiating heat exchanger 4 along with the cooling water that has air-conditioned the power demand source 16 on the way. Cooling water cooled by a cooling tower or the like is guided to the heat radiation heat exchanger 4. The cooling water from the condenser 2 and the cooling water from the cooling tower exchange heat with the heat exchanger 4 for heat radiation, and the temperature of the cooling water from the condenser 2 drops, and the cooling of the condenser driven by the inverter 9 is performed. The water is sent to the condenser 2 again by the water pump 5.

On the other hand, the cooling water from the cooling tower is
An open cooling water pump 23 interposed in the open cooling water pipe 14 guides the heat to the heat exchanger 4 for heat radiation, exchanges heat with the cooling water from the condenser 2 to increase the temperature, and sends it to a cooling tower (not shown). Can be A bypass pipe 26 is provided in the middle of the open system cooling water pipe 14, and an open system cooling water bypass valve 26 is provided in the bypass pipe 26.

In the middle of the condenser cooling water outlet pipe 12, a temperature detector 17 for detecting the temperature of the cooling water is mounted. In the middle of the hot water return pipe 10, a temperature detector 19 that detects the temperature of the cooling water that has air-conditioned the power demand source 16 is provided.
Is installed. The cooling water temperature detected by the temperature detector 17 is input to the control operation device 21 via the temperature controller 18. Similarly, the temperature of the cooling water after air conditioning detected by the temperature detector 19 is input to the control arithmetic unit 21 via the temperature controller 20. The control arithmetic unit 21 outputs a rotation command to the inverter 9 that drives the condenser cooling water pump 5 and an opening command to the open system cooling water bypass valve 22.

Incidentally, as the cooling water for cooling the condenser 2, a large amount of cooling water cooled by a cooling tower or the like has hitherto been used. The open-system cooling water having the cooling tower absorbs dust in the air when flowing through the cooling tower. Therefore, when used for heating hot water, the air-conditioning equipment may be soiled, which may cause troubles such as clogging. In the present embodiment, the cooling water for cooling the steam in the condenser is used as cooling water flowing through the closed circulation system, and this cooling water is used for air conditioning of a power demand source. Therefore, the conventional problems can be solved, and the cooling water for air conditioning, which is the power demand source, is not contaminated by dust and the like, and the water quality can be maintained in a clean state, so that the air conditioner does not become dirty.

In order to supply the cooling water of the condenser 2 as hot water for air conditioning, a hot water supply pump 25 capable of taking out a head necessary for flowing the hot water to an air conditioning load is connected to the hot water supply pipe 1.
It is attached to 1. The hot water supply pump 25 may be operated only during heating. As a result, the condenser cooling water inlet pipe 1
The pump 5 for driving the cooling water provided in the pump 3 may be any pump capable of circulating the cooling water between the condenser 2 and the heat exchanger 4 for heat radiation so that the pump can be circulated. become. In addition, during the period from spring to autumn when heating is unnecessary, there is no need to operate the hot water supply pump 25, and the pump power can be saved.

The hot water supply pump 25 is attached to the condenser cooling water outlet pipe 25, and the hot water return pipe 10 is connected downstream of the hot water pipe 11 branch of the condenser cooling water outlet pipe 25. Even if the amount changes, the flow rate of the cooling water circulating through the condenser 2 does not change, and the supply amount of the cooling water (hot water) can be changed according to the air conditioning load.

The power that can be extracted from the steam turbine 1 is related to the expansion ratio of the steam, and the enthalpy of the steam at the inlet of the steam turbine 1 and when the steam guided to the steam turbine is adiabatically expanded to the condensing pressure of the condenser 2. Is proportional to the difference in steam enthalpy of the Therefore, assuming that the pressure and temperature of the steam at the inlet of the steam turbine are constant, the power that can be extracted from the steam turbine increases when the condensing pressure of the condenser 2 is low, and the condensing pressure of the steam increases when the condensing pressure of the condenser 2 increases. The power that can be extracted from the turbine decreases.

The condensation pressure of the steam in the condenser 2 changes depending on the temperature of the cooling water for cooling the condenser. When the condensation pressure of the steam in the condenser 2 decreases, the wetness of the steam at the outlet of the steam turbine 1 increases. When the wetness of the steam increases, there is a risk that the drain in the steam may cause erosion of the blades of the steam turbine. Therefore, the lower limit of the condensing pressure is set. The condensation pressure of steam in the condenser 2 is generally set to about 9.8 kPa absolute pressure. The condensation temperature of the steam at this time is about 45 ° C.

Next, a method for minimizing a decrease in the generated power during a time when the air conditioning load is small will be described in detail below. In summer, and in the middle of spring and autumn, there is no heating demand for heating by the power demand source 16, so the power generation is prioritized. In this power generation priority operation, the hot water supply pump 25 is stopped, and the supply of hot water to the power demand source 16 is stopped. At the same time, condenser 2
The cooling water outlet temperature is the highest temperature in summer (about 40 ° C to 42 ° C).
The temperature detected by the temperature detector 17 is input to the control arithmetic unit 21 via the temperature controller 18 so as to be equal to or lower than the temperature, and the control arithmetic unit 21 switches the open system cooling water bypass valve 22 based on the cooling water temperature. Control. In the summer, the supply temperature of the open system cooling water is 32 ° C, the return temperature is 38 ° C, the condenser cooling water inlet temperature is 34 ° C to 36 ° C, and the condenser outlet temperature is 40 ° C to 42 ° C.
Set to about ° C.

In the middle period of spring and autumn, the temperature of the open cooling water is 2
The temperature drops to about 0 ° C. Accordingly, the cooling water temperature of the condenser 2 also decreases. If the steam condensing temperature of the condenser 2 is too low, the wetness of the steam flowing into the condenser 2 increases, which may cause damage to the steam turbine. The air-conditioning system is operated as described below in order to prevent such a problem from occurring and to reduce the cooling power of the condenser 2. The cooling water temperature of the condenser 2 detected by the temperature detector 17 is input to the control arithmetic unit 21 via the temperature controller 18. Based on this temperature, the control arithmetic unit 21 reduces the rotation speed of the condensate pump 5 using the inverter 9. As a result, condenser 2
The amount of cooling water flowing into the condenser 2 decreases, and the cooling water outlet temperature of the condenser 2 increases. Then, the steam condensation temperature of the condenser 2 is properly maintained.

This will be described more specifically. The cooling water inlet temperature of the condenser 2 is 2 to 4 times higher than the open system cooling water temperature as in summer.
° C higher, 22 ° C to 24 ° C. Therefore, the rotation speed of the condenser cooling water pump 5 is reduced to 30% of the rated rotation speed, and the amount of cooling water of the condenser 2 is reduced to 30%. At this time, the cooling water outlet temperature of the condenser 2 becomes 40 ° C. to 42 ° C. Thereby, the steam condensation temperature of the condenser 2 can be appropriately maintained.
Since the power of the condenser cooling water pump 5 decreases in proportion to the cube of the pump rotation speed, the power of the pump 5 decreases to about 1/10 of the high temperature in summer. Therefore, significant power savings are possible.

In winter, since the demand for heating hot water at the power demand source 16 is large, the hot water supply pump 25 connected to the condenser cooling water outlet pipe 12 is operated, and the power demand source 16 is operated.
Supply warm water to At the same time, the hot water return temperature from the power demand source 16 is detected by the hot water return temperature detector 19, and the detected hot water return temperature is input to the control arithmetic unit 21 via the temperature controller 20. The control arithmetic unit 21 controls the opening and closing of the open system cooling water bypass valve 22 based on the hot water return temperature. Thereby, the hot water return temperature can be controlled to a temperature required for heating.

If the heating load of the power demand source 16 is small, the temperature of the returned hot water remains high because heat is not taken from the supplied hot water. In this case, the control arithmetic unit 21 instructs to close the open system cooling water bypass valve 22. As a result, the amount of open system cooling water flowing into the heat radiation heat exchanger 4 increases, and the amount of heat radiation of the cooling water heated by the condenser also increases. As a result, the condenser cooling water temperature decreases, the supply temperature of the hot water supplied to the power demand source 16 decreases, and the hot water return temperature is controlled to a predetermined temperature. Therefore, if the heating load of the power demand source 16 is almost zero, the cooling water outlet temperature of the condenser 2 decreases to a predetermined hot water return temperature from the power demand source 16.

When the heating load of the power demand source 16 is large, the amount of heat taken from the supplied hot water increases, so that the temperature of the returned hot water decreases. In this case, the control arithmetic unit 21 instructs the opening of the open system cooling water bypass valve 22. Bypass valve 22
When is opened, the amount of open system cooling water flowing into the heat radiation heat exchanger 4 decreases, and the amount of heat radiation of the condenser cooling water also decreases. As a result, the condenser cooling water temperature increases, the temperature of the hot water supplied to the power demand source 16 also increases, and the hot water return temperature is controlled to a predetermined value.

The supply temperature of the heating hot water is 50 ° C. to 6 ° C.
The return temperature is often set to 0 ° C and the return temperature is set to 40 ° C to 50 ° C. Therefore, if the condenser cooling water is used as heating water for heating when the hot water return temperature of the power demand source 16 is controlled to be constant as in the present invention, the cooling water outlet temperature of the condenser 2 becomes , 40-50 ℃ or 5 depending on heating load
It changes from 0 ° C to 60 ° C.

If the inlet steam pressure of the steam turbine 1 is 2059 kPa (a), the inlet temperature is 300 ° C., and the steam condensing temperature of the condenser 2 is 45 ° C., the enthalpy of the inlet steam of the steam turbine 1 is 5188 J / kg. The enthalpy of the outlet steam is 2135 J / kg, and the enthalpy difference between the entrance and the exit is 3053 J / kg. This enthalpy difference multiplied by the steam flow rate and the efficiency of the steam turbine 1 gives
This is the output of the steam turbine 1.

In the steam turbine system having such a setting, if the condenser cooling water temperature is raised by 10 ° C. in order to take out hot water for heating in winter, the steam condensation temperature of the condenser 2 is also raised by about 10 ° C. to about 55 ° C. become. At this time, the exit steam enthalpy of the steam turbine 1 is 2185 J / kg,
The enthalpy difference between the entrance and exit is 3003 J / kg. That is, the output of the steam turbine is reduced by about 2%. The reduced efficiency is converted into a calorific value. The calorific value of the decrease is obtained by multiplying 50 J / kg by the steam turbine efficiency. Assuming that the steam turbine efficiency is 70%, the calorific value of the decrease is 35 J / kg.

On the other hand, the heat of condensation of steam in the condenser 2 is determined by the enthalpy of steam at the inlet of the steam turbine.
/ Kg from the heat equivalent 3003 × 0.7 = 2102 J / kg extracted as power in the steam turbine 1 and the enthalpy of condensate 230 J / kg. This value is 2856 J / kg. Since all of this heat is transferred to the condenser cooling water, if all of the condensed water is used as warm water for heating, the heat equivalent to about 82 times the reduced heat equivalent of the power generation is effectively used. Therefore, the overall thermal efficiency is dramatically improved.

Further, according to the present embodiment, since the temperature of the condenser cooling water is adjusted in accordance with the heating load, the time during which the power generation output of the steam turbine 1 decreases is short, and the heating time is relatively short as in Japan. In a short area, both power generation by a steam turbine and air conditioning can be efficiently satisfied. The same effect can be obtained by providing a condenser cooling water bypass valve instead of the open cooling water bypass valve. Further, the bypass valve may be a three-way valve. In the present embodiment, the hot water for air conditioning is supplied to the power demand source, but it goes without saying that the hot water for air conditioning and the power demand source may be different.

[0032]

According to the present invention described above, in an air conditioning system using a steam turbine, it is possible to change the cooling water temperature of the condenser in accordance with the power demand and the air conditioning load demand, thereby achieving high efficiency. The air conditioning of the air conditioning demand source becomes possible. Further, since the temperature of the cooling water can be changed according to the air conditioning load, it is possible to prevent energy from being wasted on air conditioning when the air conditioning load is small.

[Brief description of the drawings]

FIG. 1 is a system diagram of an embodiment of an air conditioning system using a steam turbine according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Steam turbine for electric power generation, 2 ... Condenser, 3 ... Condenser pump, 4 ... Heat exchanger for radiation, 5 ... Cooling water pump, 16 ... Demand source of electric power and heat, 17 ... Inlet cooling of condenser Water temperature detector, 18: Temperature controller, 19: Hot water temperature detector, 20: Temperature controller, 21: Control device, 22: Cooling water flow control valve, 23: Cooling water pump.

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[Procedure amendment]

[Submission date] November 15, 2000 (200.11.
15)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

A second feature of the present invention to achieve the above object is that a steam turbine, a condenser through which steam depressurized by the steam turbine is led, a generator connected to the steam turbine, and a condenser Condensate cooling water system that circulates condensate cooling water that exchanges heat with the steam led to the heat exchanger, a heat radiation heat exchanger interposed in the condensate cooling water system, and a heat radiation heat exchanger A control valve for controlling the amount of cooling water for heat dissipation, an air conditioning load pipe branching off from the condensate cooling water system and supplying condensed cooling water to the air conditioning load, and a condensate flowing through the air conditioning load pipe. Load temperature detecting means for detecting the cooling water temperature, condensed cooling water temperature detecting means for detecting the condensed cooling water temperature flowing through the condensed cooling water system, load temperature detected by the load temperature detecting means and condensed water cooling water temperature detecting means in accordance with the the condensate coolant temperature detected opening degree of the control valve It is obtained by a controller to controller.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction contents]

On the other hand, the cooling water from the cooling tower is
An open cooling water pump 23 interposed in the open cooling water pipe 14 guides the heat to the heat exchanger 4 for heat radiation, exchanges heat with the cooling water from the condenser 2 to increase the temperature, and sends it to a cooling tower (not shown). Can be A bypass pipe 26 is provided in the middle of the open system cooling water pipe 14, and an open system cooling water bypass valve 22 is provided in the bypass pipe 26.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction contents]

Incidentally, as the cooling water for cooling the condenser 2, a large amount of cooling water cooled by a cooling tower or the like has hitherto been used. The open-system cooling water having the cooling tower absorbs dust in the air when flowing through the cooling tower. Therefore, when used for heating hot water, the air-conditioning equipment may be soiled, which may cause troubles such as clogging. In this embodiment, the cooling water for cooling the steam and cooling water flowing in a closed circulation system have you to condenser, using cooling water in power demand source of the air conditioner. Therefore, the conventional problems can be solved, and the cooling water for air conditioning, which is the power demand source, is not contaminated by dust or the like in the air, and the water quality can be maintained in a clean state, so that the air conditioning equipment is not polluted.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction contents]

In order to supply the cooling water of the condenser 2 as hot water for air conditioning, a hot water supply pump 25 capable of taking out a head necessary for flowing the hot water to an air conditioning load is connected to the hot water supply pipe 1.
It is attached to 1. The hot water supply pump 25 may be operated only during heating. As a result, the condenser cooling water inlet pipe 1
The pump 5 for driving the cooling water provided in 3 may be any pump that can provide a head that can circulate the cooling water between the condenser 2 and the heat exchanger 4 for heat radiation, and the pump can be downsized. . In addition, during the period from spring to autumn when heating is unnecessary, there is no need to operate the hot water supply pump 25, and the pump power can be saved.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction contents]

Since the hot water supply pump 25 is attached to the condenser cooling water outlet pipe 12 and the hot water return pipe 10 is connected downstream of the hot water pipe 11 branch of the condenser cooling water outlet pipe 12 , Even if the amount changes, the flow rate of the cooling water circulating through the condenser 2 does not change, and the supply amount of the cooling water (hot water) can be changed according to the air conditioning load.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0028

[Correction method] Change

[Correction contents]

By the way, the inlet steam pressure of the steam turbine 1 is set to 2059 kPa (a) , the inlet temperature is set to 300 ° C., and the condenser 2
If the steam condensation temperature and 45 ° C., enthalpy of inlet steam of the steam turbine 1 3019 k J / kg, the enthalpy of the outlet steam 2135 k J / kg, and the enthalpy difference of the doorway becomes 884k J / kg. The output of the steam turbine 1 is obtained by multiplying the enthalpy difference by the steam flow rate and the efficiency of the steam turbine 1.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0029

[Correction method] Change

[Correction contents]

In the steam turbine system having such a setting, if the condenser cooling water temperature is raised by 10 ° C. in order to take out hot water for heating in winter, the steam condensation temperature of the condenser 2 is also raised by about 10 ° C. to about 55 ° C. become. Outlet steam enthalpy of the steam turbine 1 in this case is 2185 k J / kg, and the enthalpy difference of the doorway becomes 834k J / kg. That is, the output of the steam turbine is reduced by about 6 %. The reduced efficiency is converted into a calorific value. The calorie of the drop is 50 kJ / kg multiplied by the steam turbine efficiency. Assuming a steam turbine efficiency of 70%, the calorie of the drop is 35 kJ / kg.

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0030

[Correction method] Change

[Correction contents]

On the other hand, the heat of condensation of steam in the condenser 2 is determined by the enthalpy of steam at the inlet of the steam turbine 3019 k
From J / kg, a value obtained by subtracting the enthalpy 230 k J / kg of heat taken out as the power in the steam turbine 1 eq 834 × 0.7 = 584k J / kg and condensate. This value is 2205 k J / kg. Since all of this heat is transferred to the condenser cooling water, if all of the condensed water is used as warm water for heating, about 63 times the heat equivalent of the reduced heat equivalent in power generation is effectively used. Therefore, the overall thermal efficiency is dramatically improved.

Continued on the front page (72) Inventor Mitsuo Takayama 4-6 Kanda Surugadai, Chiyoda-ku, Tokyo Inside the Hitachi, Ltd. Systems Division (72) Inventor Shinyuki Murakoshi 4-6- 6 Kanda Surugadai, Chiyoda-ku, Tokyo Hitachi, Ltd. Ryohei Minowa 603, Kandamachi, Tsuchiura-shi, Ibaraki, Japan T-Tech Co., Ltd. (72) Inventor Osamu Sasabe 10 Takane, Fujii-cho, Anjo-shi, Aichi F-term in the facility department of Aisin AW Co., Ltd. 3L050 BB07 BB12 3L054 BE10

Claims (4)

[Claims] 1. A steam turbine, a condenser for converting steam depressurized by the steam turbine into water, and condensate cooling water for exchanging heat with steam guided from the steam turbine by the condenser, A condensate cooling water system having a heat exchanger for heat dissipation,
An air-conditioning pipe is provided to branch off from the condensate cooling water system and supply condensate cooling water to the air conditioning load, and the heat-radiating heat exchanger separates the condensed cooling water and the heat-radiating cooling water returned from the condenser. An air conditioning system using a steam turbine, wherein a control device for performing heat exchange and controlling a flow rate of the cooling water for radiation is provided. 2. An air conditioning system according to claim 2, wherein said air conditioning pipeline includes a detection means for detecting an air conditioning load, and said control unit controls a flow rate of the cooling water in accordance with the air conditioning load detected by said detection means. An air conditioning system using the steam turbine according to claim 1. 3. When the steam turbine is connected to a power generating means, and when priority is given to the amount of power generated by the power generating means, the control device increases the flow rate of the cooling water for cooling and lowers the temperature of the condensed cooling water. 3. The method according to claim 1, wherein the control is performed.
An air conditioning system using the steam turbine according to item 1. 4. A steam turbine, a condenser through which steam depressurized by the steam turbine is led, a generator connected to the steam turbine, and a condensate for performing heat exchange with the steam led to the condenser. A condensate cooling water system through which the cooling water circulates, a heat radiation heat exchanger interposed in the condensate cooling water system, and a control valve for controlling the amount of heat radiation cooling water guided to the heat radiation heat exchanger An air conditioning load pipe branching from the condensed cooling water system and supplying condensed cooling water to the air conditioning load, and a load temperature detecting means for detecting a temperature of the condensed cooling water flowing through the air conditioning load pipe. A condensed cooling water temperature detecting means for detecting a condensed cooling water temperature flowing through the condensed cooling water system; a load temperature detected by the load temperature detecting means and a condensed water temperature detected by the condensed cooling water temperature detecting means. A control device for controlling an opening degree of the control valve according to a water cooling water temperature Air conditioning system utilizing a steam turbine, comprising the.