EP4567359A2 - Druckgaskühlvorrichtung und lufttrennungsvorrichtung mit einer druckgaskühlvorrichtung - Google Patents

Druckgaskühlvorrichtung und lufttrennungsvorrichtung mit einer druckgaskühlvorrichtung Download PDF

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Publication number
EP4567359A2
EP4567359A2 EP24216726.0A EP24216726A EP4567359A2 EP 4567359 A2 EP4567359 A2 EP 4567359A2 EP 24216726 A EP24216726 A EP 24216726A EP 4567359 A2 EP4567359 A2 EP 4567359A2
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EP
European Patent Office
Prior art keywords
water
cooler
wet
type
compressed gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP24216726.0A
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English (en)
French (fr)
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EP4567359A3 (de
Inventor
Kenji Hirose
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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Filing date
Publication date
Application filed by Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Publication of EP4567359A2 publication Critical patent/EP4567359A2/de
Publication of EP4567359A3 publication Critical patent/EP4567359A3/de
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04157—Afterstage cooling and so-called "pre-cooling" of the feed air upstream the air purification unit and main heat exchange line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04078—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
    • F25J3/04012—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling
    • F25J3/04018—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling of main feed air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
    • F25J3/04775—Air purification and pre-cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/30—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes
    • F25J2205/34—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes as evaporative cooling tower to produce chilled water, e.g. evaporative water chiller [EWC]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/04—Compressor cooling arrangement, e.g. inter- or after-stage cooling or condensate removal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2260/00—Coupling of processes or apparatus to other units; Integrated schemes
    • F25J2260/30—Integration in an installation using renewable energy

Definitions

  • the present invention relates to a compressed gas cooling apparatus, for example a compressed gas cooling apparatus using cooling water to cool compressed gas downstream of a compressor.
  • Cooling water used to cool equipment is generally cooled using wet-type water coolers or dry-type water coolers (see, for example, JPS51-056644 , US2021/0341222 A1 ).
  • Conceivable configurations include those in which makeup water is mixed with the cooling water, and those in which the makeup water indirectly cools the cooling water via a heat exchanger without being mixed with the cooling water.
  • these configurations all have the common problem that water is lost through evaporation.
  • mixing the makeup water with the cooling water also has the concomitant problem that mineral components and the like contained in the water become concentrated.
  • Dry-type coolers cool the cooling water by indirect heat exchange with atmospheric air, by means of a heat exchanger, and require the application of a blower or the like to improve the heat exchange efficiency.
  • the temperature difference between the cooling water of an air compressor and the atmosphere is small, and when performing atmospheric cooling, the volume of air blown increases, increasing the load on the blower, and it is therefore economically rational to reduce the power consumption of the blower by employing the latent heat of vaporization of water to cool the water.
  • the present disclosure provides a water cooling apparatus of a apparatus provided with a dry-type water cooler and a wet-type water cooler, in which condensed water is generated by a compressed gas cooler and the condensed water is supplied to the wet-type water cooler, thereby making it possible to limit makeup water.
  • a compressed gas cooling apparatus comprising:
  • the apparatus may include a first control unit that controls the first flow rate regulating valve to control the amount of condensed water supplied to the wet-type cooler.
  • the apparatus may include a first control unit that controls the second flow rate regulating valve to control the amount of condensed water supplied to the wet-type cooler.
  • the apparatus may include a control unit for controlling an operation rate of the dry-type water cooler in accordance with an increase or decrease in the cost of electric power or with the availability of a renewable energy source.
  • an air separation unit including a compressed gas cooling apparatus according to any preceding claim, and means for separating the air compressed in the compressor and cooled by the apparatus.
  • a gas separation unit including a compressed gas cooling apparatus according to any preceding claim, and means for separating the gas compressed in the compressor and cooled by the apparatus for example by partial condensation and/or distillation.
  • a compressed gas cooling apparatus of the present disclosure may comprise:
  • Examples of the fluid being processed include air, flue gas containing carbon dioxide, liquefied natural gas (LNG), natural gas (NG), and boil-off gas.
  • LNG liquefied natural gas
  • NG natural gas
  • Examples of the compressed gas include compressed air, compressed natural gas, and compressed boil-off gas.
  • a compressed air cooling apparatus of the present disclosure may be provided with:
  • the compressed gas cooling apparatus of the present disclosure may be provided with:
  • the water cooling apparatus may be provided with an atmospheric air line pipe that sends the atmospheric air to the air compressor and sends the compressed air from the air compressor to the compressed air cooler.
  • the compressed air (saturated with water vapour) discharged from the compressed air cooler may be fed to an air separation device.
  • the water cooling apparatus may be provided with one or more of a storage portion of the compressed air cooler or a buffer provided separately, a storage portion of the wet-type water cooler or a buffer provided separately, and a storage portion of a water buffer provided in a condensed water line pipe, for storing the condensed water.
  • the water cooling apparatus may be provided with:
  • the water cooling apparatus may be provided with:
  • the water cooling apparatus may be provided with:
  • the first control unit may control driving of the cooling water pump.
  • the water cooling apparatus may be provided with a second control unit for controlling an operation rate of the dry-type water cooler (for controlling a blower) in accordance with an increase or decrease in the cost of electric power.
  • the second control unit may control the second flow rate regulating valve on the basis of data from the first level gauge and data from the second level gauge.
  • the second control unit may control driving of the cooling water pump.
  • the air separation device of the present disclosure may be provided with the water cooling apparatus.
  • a water cooling apparatus A1 according to embodiment 1 will be described with reference to Figure 1 .
  • the water cooling apparatus A1 comprises a compressed air cooler 12, a wet-type water cooler 13, a cooling water pump 14, and a dry-type water cooler 15.
  • the compressed air cooler 12 cools the compressed air compressed by the air compressor 11 which takes in atmospheric air containing water.
  • the compressed air cooler 12 is provided in a bottom portion with a condensed water storage portion 12a for storing condensed water produced by the increase in pressure.
  • the compressed air compressed by the air compressor 11 is cooled by the cooling water until reaching a state of water vapour saturation, and condensed water is generated.
  • the cooling water is sent from the storage portion 131 of the wet-type water cooler 13 by means of the cooling water pump 14.
  • the compressed air cooler 12 causes heat to be exchanged indirectly between the atmospheric air compressed by the air compressor 11 and the cooling water to produce compressed air saturated with water vapour.
  • the water condensed by cooling condenses to form dew on the surface of the heat exchanger and drips down, or the condensed water in the form of mist or droplets floating in the compressed air is separated by a mist separator or the like and is stored in the compressed air cooler 12.
  • the wet-type water cooler 13 includes the storage portion 131, and the condensed water generated in the compressed air cooler 12 is introduced into the bottom of the wet-type water cooler 13 as makeup water through the first condensed water line pipe L2 where it accumulates in the storage portion 131.
  • the wet-type water cooler 13 causes a portion of the cooling water to evaporate, and cools the cooling water using the latent heat of evaporation.
  • the water is caused to evaporate by being brought into contact with atmospheric air (natural convection or forced convection), but it is not necessary to release the evaporated water to the atmosphere, and evaporation may be performed under reduced pressure conditions isolated from the atmosphere, or the cooling water may be indirectly cooled by means of a heat exchanger cooled through the evaporation of the water.
  • the flow rate regulating valve 121 is provided in the first condensed water line pipe L2, and the condensed water can be sent from the compressed air cooler 12 to the wet-type water cooler 13 by controlling the opening and closing of the valve.
  • the flow rate regulating valve 121 may be opened and closed under timer control, or may be opened and closed on the basis of the level of condensed water in the compressed air cooler 12, or may be controlled by flow rate control employing a condensed water flowmeter (not shown) disposed in the condensed water line pipe L2.
  • the cooling water pump 14 is disposed in the cooling water line pipe L3, and sends the cooling water discharged from the storage portion 131 of the wet-type water cooler 13 to the cold end of the compressed air cooler 12 to cool the compressed air by means of the cooling water.
  • the dry-type water cooler 15 cools the cooling water discharged from the warm end of the compressed air cooler 12. Cooling is performed by driving a blower motor M.
  • the dry-type water cooler 15 cools the cooling water by means of indirect heat exchange with air sent from a blower.
  • the atmospheric air line pipe L1 is a pipe that sends atmospheric air to the air compressor 11 and sends compressed air from the air compressor 11 to the compressed air cooler 12.
  • the first condensed water line pipe L2 is a pipe that sends condensed water from the storage portion 12a of the compressed air cooler 12 to the top of the wet-type water cooler 13.
  • the cooling water line pipe L3 sends cooling water from the storage portion 131 of the wet-type water cooler 13 to the cold end of the compressed air cooler 12. Further, the cooling water line pipe L3 is a pipe that sends cooling water from the hot end of the compressed air cooler 12 to the dry-type water cooler 15 and sends the cooled cooling water to the wet-type water cooler 13.
  • Compressed air has a wide range of industrial uses, and when embodiment 1 is employed, water vapour derived from the atmosphere is condensed to obtain condensed water when the compressed air is cooled.
  • Supplying the condensed water to the wet-type water cooler 13 allows some cooling water evaporation loss to be covered, or allows an increase in the load of the wet-type water cooler 13 so as to limit the cooling load of the dry-type water cooler 15, thereby making it possible to reduce the power consumption required by the blower used in the dry-type water cooler 15.
  • the compressed air cooler 12 can be operated at a pressure higher than that of the cooling water line pipe L3, disposing the flow rate regulating valve 121 in the first condensed water line pipe L2 makes it possible to perform control so as to minimize energy losses resulting from reduced pressure when the condensed water is discharged from the compressed air cooler 12.
  • the wet-type water cooler 13 and the dry-type water cooler 15 are arranged in series in Figures 1 to 3 , but may be arranged in parallel. A parallel arrangement is illustrated in Figure 4 .
  • the cooling water line pipe L3 has a branch pipe L31 that branches off midway along from the warm end of the compressed air cooler 12 toward the dry-type water cooler 15.
  • the branch pipe L31 is a pipe that sends water from the warm end of the compressed air cooler 12 to the top of the wet-type water cooler 13. Further, the cooling water cooled by the dry-type water cooler merges with the cooling water line pipe L3 upstream of the cooling water pump 14.
  • a water cooling apparatus A2 according to embodiment 2 will be described with reference to Figure 2 .
  • the water cooling apparatus A2 comprises a compressed air cooler 12, a wet-type water cooler 13, a cooling water pump 14, a dry-type water cooler 15, a water buffer 16, and a first control unit 18.
  • a compressed air cooler 12 a wet-type water cooler 13, a cooling water pump 14, a dry-type water cooler 15, a water buffer 16, and a first control unit 18.
  • cooling water apparatus A2 Since access of the cooling water apparatus A2 to utilities such as electric power or water resources is not necessarily constant, it is preferable to have a buffer to operate the apparatus stably under any circumstances.
  • the water buffer 16 can store both water supplied from outside the apparatus (industrial water, etc.) and condensed water from the cooler 12. Since the condensed water may contain atmospheric components as impurities, the condensed water may be purified using a purification device or the like, either alone or together with the supplied water.
  • the purification device may be disposed between the water buffer 16 and the wet-type water cooler 13.
  • the condensed water is derived from atmospheric air, the amount thereof that can be collected is not necessarily stable, and therefore providing the water buffer 16 enables stable management of the condensed water.
  • the water buffer 16 has a storage portion 161.
  • the water buffer 16 can be supplied with service water.
  • a first condensed water line pipe L2 is connected from the storage portion 12a of the compressed air cooler 12 to the storage portion 161, and sends the condensed water.
  • a second condensed water line pipe L21 is a pipe that sends condensed water (makeup water) from the storage portion 161 of the water buffer 16 to the storage portion 131 of the wet-type water cooler 13.
  • a second flow rate regulating valve 122 is provided in the second condensed water line pipe L21.
  • the second flow rate regulating valve 122 regulates the flow rate of the condensed water (makeup water).
  • the second flow rate regulating valve 122 may be opened and closed under timer control, or may be opened and closed on the basis of the level of condensed in the storage portion 161 of the water buffer 16 and/or the liquid level in the storage portion 131 of the wet-type water cooler 13, or may be controlled by flow rate control employing a condensed water flowmeter disposed in the second condensed water line pipe L21.
  • a first level gauge 22 measures the amount of cooling water in the storage portion 131 of the wet-type water cooler 13.
  • a second level gauge 21 measures the amount of water in the storage portion 161 of the water buffer 16.
  • the first control unit 18 controls the first flow rate regulating valve 121 and the second flow rate regulating valve 122 on the basis of data from the first level gauge 22 and the second level gauge 21, to control the amount of condensed water (makeup water) supplied.
  • the first control unit 18 may control driving of the cooling water pump 14.
  • a water cooling apparatus A3 according to embodiment 3 will be described with reference to Figure 3 .
  • the water cooling apparatus A3 comprises a compressed air cooler 12, a wet-type water cooler 13, a cooling water pump 14, a dry-type water cooler 15, a water buffer 16, a first control unit 18, and a second control unit 19.
  • a compressed air cooler 12 a wet-type water cooler 13
  • a cooling water pump 14 a dry-type water cooler 15
  • a water buffer 16 a first control unit 18, and a second control unit 19.
  • a description of components that are the same as those in embodiments 1 and 2 will be omitted.
  • the second control unit 19 controls the operation rate of the dry-type water cooler 15, and more specifically controls a blower, in accordance with an increase or decrease in the cost of electric power. Data relating to the cost of electric power are sent from an external device that stores fluctuations in the cost of electric power.
  • the first control unit 18 introduces condensed water from the water buffer 16 into the wet-type water cooler 13 to adjust the operating rate thereof.
  • control is performed such that the dry-type water cooler 15 is mainly operated using inexpensive electric power during the day when solar power generation is possible, and the wet-type water cooler 13 load is increased at night as the unit price of electric power rises.
  • the condensed water obtained from the compressed air cooler 12 is stored in the water buffer 16, and during the night, the water demand of the wet-type water cooler 13 is met using the water stored in the water buffer 16.
  • the economic efficiency of the cooling water apparatus can be improved.
  • the apparatus allows renewable energy to be used when available and reduces the demand for electricity at peak periods, thus contributing to a reduction of the risk of overload.
  • Economic data such as the unit price of electricity are used to determine the operation method of the cooling water apparatus A3, that is, load sharing between the dry-type water cooler 15 (which mainly consumes electric power) and the wet-type water cooler 13 (which mainly consumes water).
  • the dry-type water cooler 15 When the cost of electric power is determined to be low, the dry-type water cooler 15 is mainly operated and the condensed water is stored in the water buffer 16, and when the cost of electric power is determined to be high, the dry-type water cooler 15 load is reduced and wet-type water cooler 13 load is increased.
  • the wet-type water cooler 13 load can be detected from the loss of water due to evaporation, specifically, from a drop in the water level in the storage portion 131 of the wet-type water cooler 13, and therefore makeup water (condensed water or a mixture of condensed water and service water) is supplied from the water buffer 16 such that the water level remains within a control value.
  • the amount of water (water level) in the water buffer 16 may be taken into consideration when determining whether to adjust the dry-type water cooler 15 load, and by so doing, even when the water level in the water buffer 16 drops, the apparatus can be operated such that the cooling water temperature is stable, by increasing the dry water cooler 15 load.
  • a case is considered in which 100,000 Nm 3 /h of air with inlet conditions of a temperature of 35°C, a relative humidity of 80%, and 1 barA is compressed and cooled using an air compressor with four compression stages to obtain compressed air with outlet conditions of a temperature of 42°C, a relative humidity of 100%, and 10 barA.
  • the cooling water temperature is 40°C
  • the cooling water can be cooled by an amount equivalent to the latent heat of vaporization of 1783 Mcal/h with 3102 kg/h of condensed water.
  • the motive power required for a dry-type water cooler may vary depending on a difference between the atmospheric temperature and the cooling water temperature, but generally the smaller the temperature difference, the more airflow is required, and for example, when atmospheric air at 35°C is being blown to obtain cooling water at 40°C, 0.052 kW of electric power are consumed.
  • the daytime period is 12 hours and the cost of electric power is 20 yen/kWH
  • the night-time period is 12 hours and the cost of electric power is 60 yen/kWH.
  • the intention is to reduce the electric power and water supply loads required for water cooling by utilizing the condensed water obtained as a result of the compression and cooling of air, but, by adjusting the timing of use of the condensed water in accordance with the power supply capacity that can be generated by utilising renewable energy, and actively utilising the condensed water in particular when power shortages are likely to occur, to reduce power consumption associated with water cooling, the cost of electric power (which implicitly includes the installation costs of a generator and a storage battery enabling stable power generation) can be reduced.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Gases (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Compressor (AREA)
EP24216726.0A 2023-12-06 2024-12-02 Druckgaskühlvorrichtung und lufttrennungsvorrichtung mit einer druckgaskühlvorrichtung Withdrawn EP4567359A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2023206024A JP7509348B1 (ja) 2023-12-06 2023-12-06 水冷却システムおよびそれを備える空気分離装置

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EP4567359A2 true EP4567359A2 (de) 2025-06-11
EP4567359A3 EP4567359A3 (de) 2025-08-06

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JP (1) JP7509348B1 (de)
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AU (1) AU2024227334A1 (de)

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US20210341222A1 (en) 2020-04-30 2021-11-04 Air Products And Chemicals, Inc. Process for Enhanced Closed-Circuit Cooling System

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