JP2010243011A - Cold water manufacturing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve a cold water manufacturing device having high energy efficiency by a configuration completely different from that of a conventional refrigerating machine. <P>SOLUTION: Within a water storage tank 5, water is stored. A steam compressor 4 sucks and discharges gas within the water storage tank 5 to decompress inside of the water storage tank 5, and compresses and discharges the steam sucked from the water storage tank 5. Due to the decompression within the water storage tank 5, water within the water storage tank 5 is cooled. Cold water obtained in this configuration is sent to an air conditioning facility etc. via a supply path 23. Since water filling amount with respect to the steam compressor 4 is controlled by a water filling valve 18, heated steam of an intended degree of superheat or saturated steam can be obtained from the steam compressor 4. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a cold water producing apparatus that obtains cold water for cooling an engine in addition to air conditioning and food cooling.

  DESCRIPTION OF RELATED ART Conventionally, as disclosed by following patent document 1, the cold water manufacturing apparatus which obtains cold water using a refrigerator is known. However, when the compressor of the refrigerator is driven by an electric motor, there is room for improvement in terms of running cost. Moreover, since the condenser of the refrigerator disposes a large amount of heat in the atmosphere, there is room for improvement in this respect. Even if it is attempted to obtain steam using heat radiation from the condenser of the refrigerator, in the case of a refrigerator using a refrigerant other than water, the critical temperature of the refrigerant is in a low temperature region, so the obtained steam temperature is limited. .

JP 2007-292351 A

  The problem to be solved by the present invention is to realize an energy-efficient cold water production apparatus with a configuration completely different from that of a conventional refrigerator. Another object is to make it possible to obtain steam in a higher temperature region than in the case of using heat radiation from a condenser of a refrigerator of a refrigerant other than water.

  The present invention has been made in order to solve the above-mentioned problems. The invention according to claim 1 is directed to a water storage tank in which water is stored, and a gas in the water storage tank is sucked and discharged to form a water tank. And a steam compressor that compresses water vapor sucked from the water storage tank, and cools the water in the water storage tank by reducing the pressure in the water storage tank. .

  According to invention of Claim 1, the water in a water storage tank can be cooled and the cold water can be manufactured by decompressing the inside of a water storage tank with a steam compressor. Moreover, since the water vapor | steam produced by pressure reduction in a water storage tank is compressed in a steam compressor and discharged as a vapor | steam, utilization of this vapor | steam can also be aimed at. At this time, it is possible to obtain steam in a higher temperature region as compared with the case of using heat radiation from the condenser of the refrigerator of the refrigerant other than water.

  According to a second aspect of the present invention, the steam compressor is driven by a steam engine that generates power using steam, and the cold water obtained by depressurization in the water storage tank is sent directly to a cooler or cooled. Adjusting the amount of steam supplied to the steam engine based on the pressure or temperature in the water tank, or the temperature of the refrigerant indirect heat exchange with the water in the water tank. It is a cold water manufacturing apparatus of Claim 1 characterized by the above-mentioned.

  According to the second aspect of the present invention, the driving cost of the steam compressor can be reduced by using the steam engine as compared with the case of using only the electric motor. In addition, cold water or refrigerant at a desired temperature can be obtained by adjusting the amount of steam supplied to the steam engine based on the pressure or temperature in the water tank or the temperature of the refrigerant that indirectly exchanges heat with the water in the water tank. Can do.

  According to a third aspect of the present invention, the steam compressor is driven by a steam engine that generates power using steam, and the cold water obtained by depressurization in the water storage tank is sent directly to a cooler or cooled. The amount of water supplied to the cooler based on the pressure or temperature in the water storage tank, or the temperature of the refrigerant indirect heat exchange with the water in the water storage tank, or The chilled water production apparatus according to claim 1, wherein a circulation amount of the refrigerant between the indirect heat exchanger and the cooler is adjusted.

  According to the invention described in claim 3, by using the steam engine, the driving cost of the steam compressor can be reduced as compared with the case of using only the electric motor. Also, based on the pressure or temperature in the water tank or the temperature of the refrigerant that indirectly exchanges heat with the water in the water tank, the amount of water supplied to the cooler or the circulation of the refrigerant between the indirect heat exchanger and the cooler By adjusting the amount, for example, the inside of the water storage tank can be maintained as desired, and the steam compressor can be operated stably.

  According to a fourth aspect of the present invention, the steam compressor is driven by a steam engine that generates power using steam, and the cold water obtained by depressurization in the water storage tank is sent directly to a cooler or cooled. The chilled water production apparatus according to claim 1, wherein the amount of steam supplied to the steam engine is adjusted based on the pressure or temperature of steam that is indirectly heat-exchanged with a refrigerant of the steam generator and discharged from the steam compressor. It is.

  According to the fourth aspect of the present invention, the driving cost of the steam compressor can be reduced by using the steam engine as compared with the case of using only the electric motor. Moreover, desired steam can be obtained by adjusting the amount of steam supplied to the steam engine based on the pressure or temperature of steam discharged from the steam compressor.

  According to the fifth aspect of the present invention, the steam compressed by the steam compressor is injected with water in the steam compressor itself or in the preceding stage or the subsequent stage, and the pressure or temperature of the steam discharged from the steam compressor is set. The cold water producing apparatus according to any one of claims 1 to 4, wherein the water injection amount in the steam compressor itself or in a preceding stage or a subsequent stage thereof is adjusted based on the steam compressor.

  According to the fifth aspect of the present invention, desired steam can be obtained by adjusting the water injection amount in the steam compressor itself or in the preceding stage or the subsequent stage based on the pressure or temperature of the steam discharged from the steam compressor. Can do.

  Furthermore, the invention according to claim 6 is characterized in that the steam discharged from the steam compressor is supplied to a water supply tank to a boiler that supplies steam to the steam engine. It is a cold water manufacturing apparatus of any one of Claims.

  According to invention of Claim 6, the steam discharged | emitted from a steam compressor can be returned to the feed water tank of a boiler, and the pre-heating of the feed water to a boiler can be aimed at.

  According to the present invention, an energy-efficient cold water production apparatus can be realized with a configuration completely different from that of a conventional refrigerator. In addition, it is possible to obtain steam in a higher temperature region as compared with the case of using heat radiation from a condenser of a refrigerator other than water.

It is the schematic which shows an example of the vapor | steam utilization system to which Example 1 of the cold water manufacturing apparatus of this invention was applied. It is the schematic which shows an example of the vapor | steam utilization system to which Example 2 of the cold water manufacturing apparatus of this invention was applied. It is a figure which shows the modification of Example 1 or Example 2, and has shown only the principal part. It is a figure which shows another modification of Example 1 or Example 2, and has shown only the principal part. It is a figure which shows another modification of Example 1 or Example 2, and has shown only the principal part. It is a figure which shows another modification of Example 1 or Example 2, and has shown only the principal part. It is a figure which shows another modification of Example 1 or Example 2, and has shown only the principal part.

  Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic view showing an example of a steam utilization system to which the first embodiment of the cold water producing apparatus of the present invention is applied. The steam utilization system 1 includes a boiler 2, a steam engine 3 that generates power using steam from the boiler 2, a steam compressor 4 that is driven by the steam engine 3, and a pressure reduced by the steam compressor 4. And a storage tank 5 for cooling the stored water.

  If the boiler 2 is a steam boiler, the structure in particular will not be ask | required. The boiler 2 is supplied with water from a water supply tank 6 through a water supply path 7. A water supply pump 8 is provided in the water supply path 7, and the presence or absence of water supply to the boiler 2 is switched depending on the operation of the water supply pump 8. The water supply tank 6 is appropriately supplied with water from the make-up water channel 9 and is maintained at a desired water level. The replenishment water channel 9 to the water supply tank 6 is provided with a pure water device or a soft water device (not shown), and pure water or soft water is supplied to the water supply tank 6. In addition, you may collect | recover drains to the water supply tank 6 from a steam utilization apparatus.

  The water supplied to the boiler 2 is vaporized by the boiler 2. The steam from the boiler 2 is sent to one or a plurality of various steam utilization devices (not shown) via a steam header (not shown) as desired.

  One type of steam utilization equipment is a steam engine 3. The steam engine 3 is not particularly limited in configuration as long as it is a prime mover that generates power using steam, and is, for example, a screw steam engine. The screw-type steam engine 3 is configured by providing a screw rotor so as to mesh with each other in a hollow casing. Steam is introduced between the screw rotors to rotate the screw rotors. And rotation power is output by rotation of this screw rotor. During this time, the steam is expanded and depressurized by passing through the steam engine 3.

  Steam from the boiler 2 is supplied to the steam engine 3 via the steam supply path 10. A steam supply valve 11 is provided in the steam supply path 10 to the steam engine 3. By adjusting the opening / closing or opening degree of the steam supply valve 11, the presence / absence of the operation of the steam engine 3 or the output can be adjusted.

  The steam engine 3 is a device that obtains a rotational driving force by the supplied steam. In the steam engine 3, the steam is expanded and decompressed. Therefore, the steam engine 3 functions not only as a drive source for the steam compressor 4 but also as a pressure reducing valve. Thereby, the steam after being used in the steam engine 3 can be used as it is in various steam utilizing devices as the steam after passing through the pressure reducing valve. Therefore, the steam after use in the steam engine 3 is sent to the steam utilization device via the exhaust steam path 12.

  The steam supply path 10 to the steam engine 3 and the exhaust steam path 12 from the steam engine 3 are connected by a bypass path 13. The bypass passage 13 is provided with a bypass valve 14. The bypass valve 14 is preferably a self-powered pressure reducing valve, and mechanically adjusts the opening degree by itself so as to maintain the secondary side (steam downstream side) steam pressure at a predetermined level. If such a bypass path 13 is provided, steam can be stably supplied to the steam utilization device on the secondary side of the bypass valve 14. For example, even when the steam supply valve 11 is closed and the steam engine 3 is stopped, the steam can be supplied to the steam utilization device via the bypass 13.

  The vapor compressor 4 is not particularly limited in its configuration, and the number of stages is not limited. For example, an impeller type (for example, axial flow type or centrifugal type) compressor and a positive displacement type (for example, screw type) compressor may be provided at the subsequent stage. The steam compressor 4 sucks and discharges the gas in the water storage tank 5 through the suction path, and depressurizes the water storage tank 5. By reducing the pressure in the water storage tank 5, the water in the water storage tank 5 is boiled. The steam compressor 4 compresses and discharges the water vapor sucked from the water storage tank 5. The steam discharged from the steam compressor 4 is sent to various steam utilizing devices via the discharge path 16 for use.

  The water vapor from the water storage tank 5 is compressed by the steam compressor 4 and is essentially superheated steam. Accordingly, superheated steam may be obtained from the steam compressor 4, but water injection is appropriately performed in the steam compressor 4 itself or in the preceding stage (the suction side to the steam compressor 4) or the subsequent stage (the discharge side from the steam compressor 4). Then, saturated steam may be obtained. Similarly, superheated steam having a desired superheat degree may be obtained by appropriately injecting water in the steam compressor 4 itself or in the preceding stage or the subsequent stage thereof. That is, desired steam can be obtained by adjusting the water injection amount. However, typically, it is set as the structure which obtains saturated steam by the water injection to the steam compressor 4 or its front | former stage or back | latter stage. At this time, it is preferable to inject water before the steam compressor 4, but here, for convenience of explanation, it is assumed that water is injected into the steam compressor 4 as shown as a water injection path 17 in FIG. 1. A water injection valve 18 is provided in the water injection path 17, and the water injection amount to the steam compressor 4 can be adjusted by the water injection valve 18.

  According to the present embodiment, it is possible to obtain steam in a higher temperature region than when a refrigerant other than water is used. That is, for example, even if an attempt is made to obtain steam by using heat radiation of a refrigerator condenser by a chlorofluorocarbon refrigerant (for example, R-245fa), since the critical temperature of the refrigerant is low (about 150 ° C.), steam in a low temperature region However, according to the present embodiment, water having a high critical temperature is vaporized by the steam compressor 4, so that steam in a higher temperature region can be obtained. It can also be obtained.

  The steam compressor 4 is driven by the steam engine 3. In the figure, the output shaft of the steam engine 3 and the input shaft of the steam compressor 4 are shown as a common shaft, but it goes without saying that they may be separate shafts via a reduction gear or the like. The steam compressor 4 may be driven by an electric motor (not shown) instead of or in addition to the steam engine 3. Note that the steam engine 3 and the steam compressor 4 may be configured as one unit 19 as indicated by a one-dot chain line in FIG.

  The water storage tank 5 is a hollow container that can withstand decompression of the internal space. The water storage tank 5 is maintained at a desired water level by appropriately supplying water from the supplementary water channel 20. For example, the water level sensor 21 provided in the water storage tank 5 controls the refill valve 22 so that the water level in the water storage tank 5 is maintained as desired. In this case, considering that the water in the water storage tank 5 can be vaporized by the steam compressor 4 and used in steam utilization equipment, then returned to the water supply tank 6 as drain and supplied to the boiler 2. The water in the water storage tank 5 is preferably pure water or soft water. For the same reason, it is preferable that the water poured in the steam compressor 4 is also pure water or soft water.

  The water storage tank 5 stores water until midway, and is divided into a gas phase portion and a liquid phase portion. The gas phase portion of the water storage tank 5 is connected to the suction port of the steam compressor 4 through the suction path 15 as described above. Thereby, the gas in the water storage tank 5 can be sucked and discharged by the steam compressor 4 to reduce the pressure in the water storage tank 5. When the pressure in the water storage tank 5 is reduced, the water stored in the water storage tank 5 is promoted to evaporate, and the stored water is cooled by the latent heat of vaporization.

  The water in the water storage tank 5 is used in various coolers (not shown) such as an air conditioner and a food machine. For example, an indoor unit (fan coil unit) of an air conditioner is used as a cooler, and water in the water storage tank 5 is supplied to the cooler via a supply path 23, and water after use in the cooler is returned to a return path 24. Through the water storage tank 5. A water supply pump 25 is provided in the supply path 23, and a pressure reducing valve 26 is provided in the return path 24. And the presence or absence of the circulation of the water between the water storage tank 5 and a cooler can be switched by the presence or absence of the action | operation of the water pump 25. FIG. Further, the flow rate from the water storage tank 5 to the cooler can be adjusted by controlling the water pump 25 with an inverter or by adjusting the opening of a flow rate adjusting valve provided in the supply path 23 or the return path 24.

  By the way, the cold water in the water storage tank 5 may be used to indirectly cool the refrigerant in the cooler, in addition to being sent directly to the cooler. Specifically, as shown by a broken line in FIG. 1, an indirect heat exchanger 27 is provided in the liquid phase portion of the water storage tank 5, and the refrigerant of the cooler is passed through the indirect heat exchanger 27. In this case, the refrigerant cooled by the water in the water storage tank 5 in the indirect heat exchanger 27 is supplied to the cooler via the supply path 23, and the refrigerant after being used in the cooler via the return path 24. And returned to the indirect heat exchanger 27.

  Further, in addition to circulating water between the water storage tank 5 and the cooler, the cold water from the water storage tank 5 may be disposable in the cooler. That is, the cold water in the water storage tank 5 is supplied to the cooler via the supply path 23, and the water after use for cooling the food does not have to be returned to the water storage tank 5. In this case, the return path 24 can be omitted because there is the water refilling path 20.

  The cold water manufacturing apparatus further includes a controller 28. In the present embodiment, the controller 28 is connected to various sensors 29 to 31 in addition to the steam supply valve 11, the water injection valve 18, and the water supply pump 25. As this sensor, a sensor 29 for detecting the pressure in the discharge passage 16 from the steam compressor 4, a sensor (not shown) for detecting the temperature in the discharge passage 16, a sensor 30 for detecting the pressure in the water storage tank 5, a water storage One or more sensors such as a sensor for detecting the temperature in the tank 5 (including a sensor 31 for detecting the water temperature in the water storage tank 5), a sensor for detecting the temperature of the refrigerant in the cooler (not shown), etc. Used. The controller 28 uses the detection signals of these sensors and the like to supply steam to the steam engine 3, the amount of water injected to the steam compressor 4, and whether water or refrigerant is supplied from the supply path 23 to the cooler. Or, adjust one or more of the flow rate. For example, any one or more of the following first to fourth controls are performed.

  First, the steam supply amount to the steam engine 3 is adjusted based on the pressure or temperature in the water storage tank 5 or the temperature of the refrigerant that indirectly exchanges heat with the water in the water storage tank 5. For example, the opening / closing or opening degree of the steam supply valve 11 is adjusted based on the detection signal of the pressure sensor 30 or the temperature sensor 31 provided in the water storage tank 5. Thereby, the cold water or refrigerant | coolant of desired temperature can be obtained.

  Second, based on the pressure or temperature in the water storage tank 5 or the temperature of the refrigerant indirect heat exchange with the water in the water storage tank 5, the amount of water supplied to the cooler or the indirect heat exchanger 27 and the cooler Adjust the amount of refrigerant in between. For example, the water pump 25 is inverter-controlled based on the detection signal of the pressure sensor 30 or the temperature sensor 31 provided in the water storage tank 5. Thereby, the inside of the water storage tank 5 can be maintained as desired, and the steam compressor 4 can be stably operated.

  Third, the amount of steam supplied to the steam engine 3 is adjusted based on the pressure or temperature of the steam discharged from the steam compressor 4. For example, the opening / closing or opening degree of the steam supply valve 11 is adjusted based on a detection signal from a pressure sensor 29 or a temperature sensor provided in the discharge passage 16 from the steam compressor 4. Thereby, desired steam can be obtained from the steam compressor 4.

  Fourth, based on the pressure or temperature of the steam discharged from the steam compressor 4, the amount of water injection in the steam compressor 4 itself or the preceding stage or the subsequent stage is adjusted. For example, the opening / closing or opening degree of the water injection valve 18 is adjusted based on the detection signal of the pressure sensor 29 or the temperature sensor provided in the discharge passage 16 from the steam compressor 4. Thereby, desired steam can be obtained from the steam compressor 4. This fourth control is preferably used in combination with the first, second or third control.

  FIG. 2 is a schematic diagram illustrating an example of a steam utilization system 1 to which the second embodiment of the cold water producing apparatus of the present invention is applied. The cold water production apparatus and the steam utilization system 1 of the second embodiment are basically the same as those of the first embodiment. Therefore, in the following description, differences between the two will be mainly described, and corresponding portions will be described with the same reference numerals.

  In the first embodiment, the steam from the steam compressor 4 is sent to the steam utilization device and used. However, in the second embodiment, the steam from the steam compressor 4 enters the water supply tank 6 of the boiler 2. Infused. Thereby, preheating of the feed water of the boiler 2 can be aimed at. Other configurations and controls are the same as those in the first embodiment, and a description thereof will be omitted.

  The cold water manufacturing apparatus of the present invention is not limited to the configuration of each of the above embodiments, and can be changed as appropriate. For example, in each of the above embodiments, the steam compressor 4 is driven by the steam engine 3, but may be driven by an electric motor. Moreover, it is good also as a structure which can be driven by both the steam engine 3 and an electric motor, and it is good also as what can drive or can adjust a drive ratio. Furthermore, in each said Example, although the water was poured into the steam compressor 4, this water injection may be abbreviate | omitted and superheated steam may be obtained from the steam compressor 4, and the superheated steam may be utilized.

  Moreover, the structure of the water storage tank 5 and the connection structure of the water storage tank 5 and a cooler can be changed suitably. That is, in each of the above embodiments, the water is simply stored in the water storage tank 5 and the water is sent directly to the cooler, or the refrigerant of the cooler is passed through the indirect heat exchanger 27 provided in the water storage tank 5. However, the configuration shown in FIGS. 3 to 7 may be adopted.

  In the configuration of FIG. 3, the water in the water storage tank 5 is pumped up by the circulation pump 32 and sprayed downward from the nozzle 33 at the top of the water storage tank 5. Thereby, evaporation of water in the water storage tank 5 can be further promoted. In addition, the water in the water storage tank 5 is not directly sent to the cooler, but is provided with an indirect heat exchanger 27 (FIGS. 1 and 2) in the water storage tank 5 for cooling as in the above embodiments. It goes without saying that heat may be exchanged with the refrigerant in the vessel.

  In the configuration of FIG. 4, the indirect heat exchanger 27 is disposed in the water storage tank 5, and the refrigerant of the cooler is circulated through the indirect heat exchanger 27, which is the same as that described in the above embodiments. However, in the configuration of FIG. 4, all of the pipe lines constituting the indirect heat exchanger 27 (may be a part depending on the case) are not immersed in the stored water but are disposed in the gas phase portion of the water storage tank 5. . As in the configuration of FIG. 3, the water in the water storage tank 5 is sprayed from above by the nozzle 33 by the circulation pump 32. Thereby, the sprayed water hits the pipe line of the indirect heat exchanger 27, and cooling of the refrigerant is promoted by latent heat of vaporization.

  In the configuration of FIG. 5, an indirect heat exchanger 27 is provided outside the water storage tank 5, and the indirect heat exchanger 27 is provided with a water flow path 27a and a refrigerant flow path 27b. Then, water is circulated by the circulation pump 32 between the water storage tank 5 and the water flow path 27a. Specifically, the water stored in the water storage tank 5 is supplied to the indirect heat exchanger 27 via the circulation pump 32, passes through the water flow path 27 a of the indirect heat exchanger 27, and then returned to the water storage tank 5. At that time, the return water from the indirect heat exchanger 27 may be sprayed from the upper part of the water storage tank 5 as in the illustrated example. On the other hand, the refrigerant of the cooler is passed through the refrigerant flow path 27 b of the indirect heat exchanger 27. At this time, as in the illustrated example, in the indirect heat exchanger 27, it is preferable that water and the refrigerant flow in a counter flow. In the configuration of FIG. 5, in the indirect heat exchanger 27, the water in the water storage tank 5 and the refrigerant in the cooler are indirectly heat-exchanged, and the coolant in the cooler can be cooled with the cold water from the water storage tank 5. .

  In addition, in the structure of FIG. 5, it cannot be overemphasized that the indirect heat exchanger 27 can be changed as FIG. 6 and FIG. 7 shows. That is, the indirect heat exchanger 27 is constituted by a hollow tank 27c and a pipe line 27d provided inside thereof, and water from the water storage tank 5 is passed through one of the hollow tank 27c and the pipe line 27d, and the other side. The refrigerant of the cooler is passed through. In FIG. 6, water is passed through the hollow tank 27c, and the refrigerant is passed through the conduit 27d in the hollow tank 27c. On the contrary, in FIG. 7, the refrigerant is passed through the hollow tank 27c, and the water is passed through the conduit 27d in the hollow tank 27c.

  Finally, the cold water producing apparatus of the present invention may be used for cooling relatively high-temperature objects such as engines, in addition to air conditioning and food cooling. For example, a jacket may be provided as a cooler in the gas engine, and the gas engine may be cooled by passing cold water obtained by the cold water manufacturing apparatus of the present invention or a refrigerant heat-exchanged with the jacket through the jacket.

DESCRIPTION OF SYMBOLS 1 Steam utilization system 2 Boiler 3 Steam engine 4 Steam compressor 5 Water storage tank 6 Water supply tank 11 Steam supply valve 18 Water injection valve 23 Supply path 24 Return path 25 Water pump 27 Indirect heat exchanger 29 Pressure sensor 30 Pressure sensor 31 Temperature sensor

Claims (6)

A water storage tank in which water is stored;
A gas compressor that sucks and discharges the gas in the water storage tank, depressurizes the water storage tank, and compresses the water vapor sucked from the water storage tank;
The cold water manufacturing apparatus characterized by cooling the water in the water storage tank by depressurization in the water storage tank. The steam compressor is driven by a steam engine that generates power using steam,
Cold water obtained by decompression in the water storage tank is sent directly to the cooler or indirectly heat exchanged with the refrigerant of the cooler,
The steam supply amount to the steam engine is adjusted based on the pressure or temperature in the water storage tank or the temperature of a refrigerant that indirectly exchanges heat with water in the water storage tank. Cold water production equipment. The steam compressor is driven by a steam engine that generates power using steam,
Cold water obtained by decompression in the water storage tank is sent directly to the cooler, or heat exchange is performed between the refrigerant in the cooler and an indirect heat exchanger,
Based on the pressure or temperature in the water storage tank, or the temperature of the refrigerant indirect heat exchange with the water in the water storage tank, the amount of water supplied to the cooler, or between the indirect heat exchanger and the cooler The cold water manufacturing apparatus according to claim 1, wherein the circulation amount of the refrigerant is adjusted. The steam compressor is driven by a steam engine that generates power using steam,
Cold water obtained by decompression in the water storage tank is sent directly to the cooler or indirectly heat exchanged with the refrigerant of the cooler,
The cold water production apparatus according to claim 1, wherein the amount of steam supplied to the steam engine is adjusted based on the pressure or temperature of steam discharged from the steam compressor. The steam compressed by the steam compressor is injected with water in the steam compressor itself or in the preceding stage or the subsequent stage,
The amount of water injection in the steam compressor itself or in the preceding stage or the subsequent stage thereof is adjusted based on the pressure or temperature of the steam discharged from the steam compressor. Cold water production equipment. The cold water manufacturing apparatus according to any one of claims 1 to 5, wherein the steam discharged from the steam compressor is supplied to a water supply tank to a boiler that supplies steam to the steam engine.

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