US20130333403A1 - Process for throttling a compressed gas for evaporative cooling - Google Patents
Process for throttling a compressed gas for evaporative cooling Download PDFInfo
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- US20130333403A1 US20130333403A1 US13/818,350 US201113818350A US2013333403A1 US 20130333403 A1 US20130333403 A1 US 20130333403A1 US 201113818350 A US201113818350 A US 201113818350A US 2013333403 A1 US2013333403 A1 US 2013333403A1
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- working fluid
- compression stage
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- cooling
- evaporative
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
- F04D17/12—Multi-stage pumps
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
- F04D29/5846—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps cooling by injection
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
- F25B2309/061—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical pressure
Definitions
- one common cooling strategy includes a continuous cooling system, where there is no direct contact between the incoming working fluid and the cooling medium.
- a finite number of compression stages are equipped with a series of external heat exchangers interposed between each stage and configured to intercool the working fluid to at or near local ambient conditions. Decreasing the temperature of the cooling medium to below local ambient, however, requires additional work and results in an increased power demand and decreased efficiency.
- Another common compressor cooling strategy is evaporative cooling where cooling is achieved by directly mixing the working fluid with the cooling medium.
- the cooling medium is injected directly into the gas loop of the compressor where it is atomized and evaporated into the working fluid.
- the evaporative cooling strategy relies on the evaporation and adiabatic saturation of the cooling medium to decrease the temperature of the working fluid.
- Embodiments of the disclosure may provide a system for cooling a compressed working fluid.
- the system may include a compressor having a series of compression stages for compressing a working fluid, the series of compression stages including an evaporative compression stage that compresses the working fluid to at least a critical pressure, and a series of heat exchangers fluidly coupled to the series of compression stages, wherein at least one heat exchanger is interposed between each compression stage and configured to decrease a temperature of the working fluid discharged from a preceding compression stage.
- the system may also include a valve communicably coupled to the at least one heat exchanger following the evaporative compression stage and configured to receive and throttle a portion of the working fluid as a recycle working fluid, wherein the valve throttles the recycle working fluid to at least its saturated liquid-vapor state, and a fogging device fluidly coupled to the valve and a target compression stage, the fogging device being configured to receive the recycle working fluid and evaporatively cool the working fluid entering the target compression stage.
- a valve communicably coupled to the at least one heat exchanger following the evaporative compression stage and configured to receive and throttle a portion of the working fluid as a recycle working fluid, wherein the valve throttles the recycle working fluid to at least its saturated liquid-vapor state
- a fogging device fluidly coupled to the valve and a target compression stage, the fogging device being configured to receive the recycle working fluid and evaporatively cool the working fluid entering the target compression stage.
- Embodiments of the disclosure may further provide a method of cooling a compressed working fluid.
- the method may include compressing a working fluid in a series of compression stages, the series of compression stages including an evaporative compression stage that compresses the working fluid to at least a critical pressure, and cooling the working fluid in a series of heat exchangers fluidly coupled to the series of compression stages, wherein at least one heat exchanger is interposed between each compression stage and each heat exchanger is configured to decrease a temperature of the working fluid discharged from a preceding compression stage.
- the method may also include throttling a portion of the working fluid discharged from the evaporative compression stage to at least its saturated liquid-vapor state with a valve fluidly coupled to the evaporative compression stage, and atomizing the portion of the working fluid with a fogging device fluidly coupled to the valve and a target compression stage.
- the method may further include evaporatively cooling the working fluid entering the target compression stage.
- Embodiments of the disclosure may further provide another method of cooling a working fluid in a compressor.
- the method may include compressing the working fluid above a critical pressure in a first compression stage to generate a compressed working fluid, and throttling a portion of the compressed working fluid to its saturated liquid-vapor state to generate a recycle working fluid.
- the method may further include atomizing the recycle working fluid with an atomizing nozzle whereby the recycle working fluid evaporates and cools, injecting the recycle working fluid at a suction inlet of a target compression stage to cool the working fluid therein.
- FIG. 1 illustrates an exemplary system for cooling a compressed working fluid, according to one or more embodiments disclosed.
- FIG. 2 illustrates a representative pressure versus enthalpy diagram for the working fluid used in the system of FIG. 1 , according to one or more embodiments disclosed.
- FIG. 3 illustrates another exemplary system for cooling a compressed gas, according to one or more embodiments disclosed.
- FIG. 4 illustrates another representative pressure versus enthalpy diagram for the working fluid used in the system of FIG. 3 , according to one or more embodiments disclosed.
- FIG. 5 illustrates a flow chart of a method for cooling a working fluid, according to one or more embodiments disclosed.
- first and second features are formed in direct contact
- additional features may be formed interposing the first and second features, such that the first and second features may not be in direct contact.
- exemplary embodiments presented below may be combined in any combination of ways, i.e., any element from one exemplary embodiment may be used in any other exemplary embodiment, without departing from the scope of the disclosure.
- FIG. 1 illustrates an exemplary system 100 for cooling a compressed working fluid, according to one or more disclosed embodiments.
- the system 100 includes a compressor 102 , such as a multi-stage compressor, that has a series of compression stages 104 a, 104 b , 104 c, and 104 d.
- the compressor 102 is a centrifugal compressor and may form an integral part of an industrial compression system.
- the compressor 102 may be an axial or reciprocating compressor. While only four compression stages 104 a - d are illustrated, it will be appreciated that more or less compression stages may be implemented without departing from the scope of the disclosure. For instance, embodiments contemplated herein include as many as eight or ten compression stages.
- the system 100 may employ a continuous cooling strategy including a series of heat exchangers 106 a, 106 b, 106 c, and 106 d fluidly coupled to and interposing succeeding compression stages 104 a, 104 b, 104 c, and 104 d, respectively.
- the heat exchangers 106 a - d may be external heat exchangers, or they may form an integral part of the compressor 102 assembly.
- the heat exchangers 106 a - d may any type of heat exchanging device, such as, but not limited to, direct contact heat exchangers, trim coolers, water-cooled heat exchangers, air-cooled heat exchangers, mechanical refrigeration units, combinations thereof, and the like.
- heat exchangers 106 a - d While only four heat exchangers 106 a - d are illustrated, it will be appreciated that more or less than four may be implemented without departing from the scope of the disclosure. For instance, other embodiments contemplated herein include multiple heat exchangers interposed between each compression stage 104 a - d.
- the system 100 employs an evaporative cooling strategy including at least one valve 108 and at least one fogging device 110 .
- the valve 108 may be a throttling valve such as an expansion valve. In other embodiments, the valve 108 may be an expander or a turbine configured to recover a portion of power through the expansion of the compressed working fluid.
- the fogging device 110 may be configured to convert the working fluid into a “fog,” or atomized droplets, for injection into a target compression stage, such as the succeeding fourth compressor stage 104 d. To atomize the fluid and generate the fog, a high-pressure atomizing nozzle 112 may be employed within the fogging device 110 .
- the atomizing nozzle 112 may be operable at pressures ranging from about 7,000 KPa to about 20,000 KPa. It will be appreciated, however, that the operable pressure ranges for the atomizing nozzle 112 may vary as a function of the gas properties. Also, while only one evaporative cooling strategy is depicted in FIG. 1 , embodiments contemplated herein include having two or more evaporative cooling strategies implemented in the same compressor 102 , without departing from the scope of the disclosure.
- a working fluid to be compressed and/or conveyed is introduced into the system 100 and the compressor 102 via line 114 .
- the working fluid may be a compressible gas such as, but not limited to, carbon dioxide (CO 2 ).
- the first compression stage 104 a compresses the incoming working fluid, thereby increasing both the pressure and the temperature of the working fluid.
- the suction pressure of the succeeding compression stage i.e., the second compression stage 104 b
- a cooler suction temperature will demand less power to operate the compression stage for the same mass flow to reach the same discharge pressure.
- the first compression stage 104 a conveys the working fluid to the first heat exchanger 106 a where the temperature of the working fluid is decreased to at or about ambient temperature.
- the working fluid may then be discharged to the second compression stage 104 b and subsequent second heat exchanger 106 b, where the compression and cooling process is generally repeated. As depicted, similar compression/cooling processes are repeated a third and a fourth time in the third compression stage 104 c and third heat exchanger 106 c, and the fourth compression stage 104 d and fourth heat exchanger 106 d, respectively.
- the compressor 102 then discharges a compressed working fluid via line 107 to be used, for example, in downstream applications.
- downstream applications may include carbon dioxide sequestration and/or storage.
- a portion of the working fluid discharged from the fourth heat exchanger 106 d may be extracted as a recycled working fluid and directed into line 116 .
- the extracted working fluid may be throttled through the valve 108 to bring the recycle working fluid to its saturated liquid state, resulting in a liquid or partially-liquid recycle working fluid discharged into line 118 .
- Throttling the recycle working fluid through the valve 108 may be configured to reduce the static pressure of the recycle working fluid to at or near the suction inlet pressure of the fourth compression stage 104 d.
- the recycle working fluid in line 118 may then be introduced to the fogging device 110 which is fluidly coupled to a target compression stage, i.e., the compression stage that is to be evaporatively cooled.
- the fogging device 110 is arranged to evaporatively cool the working fluid discharged from the third heat exchanger 106 c before the working fluid is introduced into the inlet of the fourth compression stage 104 d.
- the atomizing nozzle 112 disposed within the fogging device 110 receives and atomizes the recycle working fluid derived from line 118 . Atomizing the recycle working fluid facilitates its quick evaporation in the presence of the incoming working fluid from the third heat exchanger 106 c, and thereby cools the incoming working fluid.
- the atomizing nozzle 112 may generate a droplet size and general distribution that promotes the evaporation of the droplets before the droplets reach downstream impeller blades or other sensitive parts of the succeeding compression stage (e.g., the fourth compression stage 104 d ). As can be appreciated, therefore, atomization of the fluid substantially prevents machinery erosion and/or rotordynamic vibrational issues.
- the diagram 200 depicts a thermodynamic phase dome 202 corresponding to a working fluid that can be used in the system 100 .
- the phase dome 202 may be representative of CO 2 .
- the phase dome 202 is generally centered around the critical pressure point 204 of the working fluid, where the saturated liquid and saturated vapor lines meet. Above the critical point 204 and outside of the phase dome 202 , the working fluid exists as a dense gas, while below the critical point 204 and inside or below the phase dome 202 , the working fluid exists as a saturated liquid-vapor.
- the working fluid is compressed and cooled in several stages corresponding to the system 100 described above.
- line 206 a represents compression of the working fluid in the first compression stage 104 a
- line 208 a represents cooling the working fluid in the first heat exchanger 106 a.
- lines 206 b, 206 c, and 206 d represent compression of the working fluid in the second, third, and fourth compression stages 104 b, 104 c, and 104 d, respectively
- lines 208 b, 208 c, and 208 d represent cooling the working fluid in heat exchangers 106 b, 106 c, and 106 d, respectively.
- Embodiments of the system 100 described herein take advantage of the working fluid being compressed above its critical pressure, or otherwise outside the thermodynamic phase dome 202 .
- an evaporative cooling strategy may be implemented at any point during the compression process, in order to maximize the regenerative cooling effect, the working fluid throttled through the valve 108 should be at or above the critical pressure point 204 of the working fluid. Since the fourth compression stage 104 d (corresponding to line 206 d ) compresses the working fluid to either meet or exceed the critical pressure point 204 , it may be characterized as an “evaporative compression stage,” and evaporative cooling of the working fluid may be effectively undertaken thereafter as generally described above.
- the dashed line 210 in the diagram 200 represents the flow of the recycle working fluid via line 116 as it is throttled through the valve 108 ( FIG. 1 ) to a saturated liquid state or saturated liquid-vapor state at or inside the thermodynamic vapor dome 202 .
- the valve 108 may be configured to throttle the recycle working fluid to a pressure at or near the suction inlet pressure 212 of a target compression stage, such as the fourth or evaporative compression stage 104 d (i.e., line 206 d ).
- the target compression stage may also be the evaporative compression stage itself, as depicted, or any compression stage that precedes the evaporative compression stage.
- the recycle working fluid may be throttled and then subsequently atomized and injected back into the target compression stage using the atomizing nozzle 112 disposed within the fogging device 110 ( FIG. 1 ).
- the recycle working fluid As the recycle working fluid is ejected from the atomizing nozzle 112 , it quickly evaporates and provides regenerative cooling to the target compression stage which lowers the temperature of the working fluid below ambient temperature.
- FIG. 3 depicted is another exemplary system 300 for cooling a compressed gas, according to embodiments described herein.
- the system 300 may be substantially similar to the system 100 of FIG. 1 .
- FIG. 3 may be best understood with reference to FIG. 1 where like numerals represent like components that will not be described again in detail.
- the system 300 of FIG. 3 includes a multi-stage compressor 102 having a series of compression stages 104 a - d alternatingly interposed by a corresponding series of heat exchangers 106 a - d .
- the evaporative cooling strategy including the valve 108 and the fogging device 110 , may target the third compression stage 104 c, thereby characterizing the third compression stage 104 c as the evaporative compression stage.
- any compression stage that successfully compresses the working fluid to at or above the critical pressure of the working fluid may be characterized as the evaporative compression stage.
- the working fluid is introduced into the system 300 via line 114 and directed to the first compression stage 104 a to compress the working fluid.
- the first compression stage 104 a may be configured to convey the working fluid to the first heat exchanger 106 a where the temperature of the working fluid decreased to at or around ambient temperature. Once cooled, the working fluid may then be discharged from the first heat exchanger 106 a, and the process may be repeated in succeeding compression stages 104 b, 104 c and heat exchangers 106 b, 106 c.
- a portion of the working fluid discharged from the third heat exchanger 106 c may be separated into line 302 as the recycle working fluid.
- the recycle working fluid is then throttled to its saturated liquid-vapor state using the valve 108 and directed to the fogging device 110 via line 304 as a liquid or partially-liquid recycle working fluid.
- the recycle working fluid evaporates in the presence of the incoming working fluid from the second heat exchanger 106 b, thereby evaporatively cooling the incoming working fluid to a temperature below ambient.
- FIG. 4 depicted is a pressure versus enthalpy diagram 400 for the system 300 generally described above.
- the diagram 400 includes an exemplary thermodynamic phase dome 402 having a critical pressure point 404 corresponding to the working fluid used in the system 300 .
- the working fluid is compressed and cooled in several stages corresponding to the system 300 described above.
- line 406 a represents the compression of the working fluid in the first compression stage 104 a
- line 408 a represents the working fluid being cooled in the first heat exchanger 106 a.
- lines 406 b - d represent compression of the working fluid in the second, third, and fourth compression stages 104 b - d , respectively, and lines 408 b - d represent cooling of the working fluid in heat exchangers 106 b - d , respectively.
- the third compression stage 104 c (corresponding to line 406 c in the diagram 400 ) is capable of compressing the working fluid to either meet or exceed the critical pressure point 404 of the working fluid. Consequently, the third compression stage 104 c may be used as the evaporative compression stage in system 300 , and evaporative cooling of the working fluid as described herein may be effectively undertaken at any point thereafter.
- the dashed line 410 in the diagram 400 represents the flow of the recycle working fluid as it is throttled through the valve 108 ( FIG. 3 ) to a saturated liquid-vapor state inside the thermodynamic vapor dome 402 .
- the recycle working fluid may be throttled to a suction inlet pressure 412 of a desired target compression stage, or the compression stage where the evaporative cooling is to take place.
- the target compression stage may be the third compression stage 104 c (i.e., line 406 c ). Consequently, the valve 108 may be configured to throttle the recycle working fluid to at or near the suction inlet pressure 412 of the third compression stage 104 c.
- the target compression stage may be the evaporative compression stage itself or any other compression stage that precedes the evaporative compression stage.
- the recycle working fluid may then be atomized and injected back into the working fluid at the third compression stage 104 c via line 406 c using the atomizing nozzle 112 disposed within the fogging device 110 ( FIG. 3 ).
- the recycle working fluid is ejected from the atomizing nozzle 112 , it evaporatively cools the target compression stage, which allows the temperature of the working fluid to be lowered below ambient.
- the method 500 may include injecting a working fluid into a compressor, as at 502 .
- the working fluid may be compressed in a series of compression stages arranged in the compressor, as at 504 .
- one of the series of compression stages may be an evaporative compression stage that compresses the working fluid to at least its critical pressure.
- the working fluid may then be cooled in a series of heat exchangers fluidly coupled to the series of compression stages, as at 506 .
- at least one heat exchanger is interposed between each compression stage.
- each heat exchanger may be configured to decrease the temperature of the working fluid discharged from a preceding compression stage to at or near ambient temperature.
- a portion of the working fluid may then be throttled to at least its saturated liquid-vapor state, as at 508 .
- the portion of the working fluid may be throttled using a valve fluidly coupled to a heat exchanger following the evaporative compression stage.
- the working fluid is throttled using an expander or turbine.
- the portion of the working fluid may then be atomized with a fogging device fluidly coupled to both the valve and at least one compression stage, as at 510 , such as a target compression stage.
- the working fluid entering the at least one compression stage may then be evaporatively cooled through evaporative cooling of the throttled portion of the working fluid, as at 512 .
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Abstract
A system and method of cooling a compressed working fluid is disclosed. The method includes compressing the working fluid above its critical pressure point in a compression stage to generate a compressed working fluid at or about local ambient temperature. The compressed working fluid can be cooled to below ambient by throttling a portion of the compressed working fluid to its saturated liquid-vapor state to generate a recycle working fluid. The recycle working fluid may then be atomized using an atomizing nozzle whereby the recycle working fluid evaporates and cools working fluid entering a target compression stage.
Description
- The present application claims priority to U.S. Provisional Patent Application Ser. No. 61/376,133 entitled “Process for Throttling a Compressed Gas for Evaporative Cooling,” which was filed on Aug. 23, 2010. The contents of the priority application are hereby incorporated by reference into the present disclosure in their entirety.
- As a compressor increases the pressure of a working fluid, the temperature of the working fluid and the components of the compressor also increases. Increased temperatures oftentimes decrease compressor efficiency by amplifying the amount of work required to compress the fluid. This can result in damage to or premature failure of compressor components. To avoid compressor damage and simultaneously increase its efficiency, several cooling strategies are typically employed to achieve a more iso-thermal compression process.
- For example, one common cooling strategy includes a continuous cooling system, where there is no direct contact between the incoming working fluid and the cooling medium. In a typical continuous cooling system arrangement, a finite number of compression stages are equipped with a series of external heat exchangers interposed between each stage and configured to intercool the working fluid to at or near local ambient conditions. Decreasing the temperature of the cooling medium to below local ambient, however, requires additional work and results in an increased power demand and decreased efficiency.
- Another common compressor cooling strategy is evaporative cooling where cooling is achieved by directly mixing the working fluid with the cooling medium. In a typical evaporative cooling arrangement, the cooling medium is injected directly into the gas loop of the compressor where it is atomized and evaporated into the working fluid. In operation, the evaporative cooling strategy relies on the evaporation and adiabatic saturation of the cooling medium to decrease the temperature of the working fluid.
- While there are several compressor cooling strategies known, it is nonetheless desirable to find improved and more efficient methods of cooling.
- Embodiments of the disclosure may provide a system for cooling a compressed working fluid. The system may include a compressor having a series of compression stages for compressing a working fluid, the series of compression stages including an evaporative compression stage that compresses the working fluid to at least a critical pressure, and a series of heat exchangers fluidly coupled to the series of compression stages, wherein at least one heat exchanger is interposed between each compression stage and configured to decrease a temperature of the working fluid discharged from a preceding compression stage. The system may also include a valve communicably coupled to the at least one heat exchanger following the evaporative compression stage and configured to receive and throttle a portion of the working fluid as a recycle working fluid, wherein the valve throttles the recycle working fluid to at least its saturated liquid-vapor state, and a fogging device fluidly coupled to the valve and a target compression stage, the fogging device being configured to receive the recycle working fluid and evaporatively cool the working fluid entering the target compression stage.
- Embodiments of the disclosure may further provide a method of cooling a compressed working fluid. The method may include compressing a working fluid in a series of compression stages, the series of compression stages including an evaporative compression stage that compresses the working fluid to at least a critical pressure, and cooling the working fluid in a series of heat exchangers fluidly coupled to the series of compression stages, wherein at least one heat exchanger is interposed between each compression stage and each heat exchanger is configured to decrease a temperature of the working fluid discharged from a preceding compression stage. The method may also include throttling a portion of the working fluid discharged from the evaporative compression stage to at least its saturated liquid-vapor state with a valve fluidly coupled to the evaporative compression stage, and atomizing the portion of the working fluid with a fogging device fluidly coupled to the valve and a target compression stage. The method may further include evaporatively cooling the working fluid entering the target compression stage.
- Embodiments of the disclosure may further provide another method of cooling a working fluid in a compressor. The method may include compressing the working fluid above a critical pressure in a first compression stage to generate a compressed working fluid, and throttling a portion of the compressed working fluid to its saturated liquid-vapor state to generate a recycle working fluid. The method may further include atomizing the recycle working fluid with an atomizing nozzle whereby the recycle working fluid evaporates and cools, injecting the recycle working fluid at a suction inlet of a target compression stage to cool the working fluid therein.
- The present disclosure is best understood from the following detailed description when read with the accompanying Figures. It is emphasized that, in accordance with the standard practice in the industry, various features are not drawn to scale. In fact, the dimensions of the various features may be arbitrarily increased or reduced for clarity of discussion.
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FIG. 1 illustrates an exemplary system for cooling a compressed working fluid, according to one or more embodiments disclosed. -
FIG. 2 illustrates a representative pressure versus enthalpy diagram for the working fluid used in the system ofFIG. 1 , according to one or more embodiments disclosed. -
FIG. 3 illustrates another exemplary system for cooling a compressed gas, according to one or more embodiments disclosed. -
FIG. 4 illustrates another representative pressure versus enthalpy diagram for the working fluid used in the system ofFIG. 3 , according to one or more embodiments disclosed. -
FIG. 5 illustrates a flow chart of a method for cooling a working fluid, according to one or more embodiments disclosed. - It is to be understood that the following disclosure describes several exemplary embodiments for implementing different features, structures, or functions of the invention. Exemplary embodiments of components, arrangements, and configurations are described below to simplify the present disclosure; however, these exemplary embodiments are provided merely as examples and are not intended to limit the scope of the invention. Additionally, the present disclosure may repeat reference numerals and/or letters in the various exemplary embodiments and across the Figures provided herein. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various exemplary embodiments and/or configurations discussed in the various Figures. Moreover, the formation of a first feature over or on a second feature in the description that follows may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features may be formed interposing the first and second features, such that the first and second features may not be in direct contact. Finally, the exemplary embodiments presented below may be combined in any combination of ways, i.e., any element from one exemplary embodiment may be used in any other exemplary embodiment, without departing from the scope of the disclosure.
- Additionally, certain terms are used throughout the following description and claims to refer to particular components. As one skilled in the art will appreciate, various entities may refer to the same component by different names, and as such, the naming convention for the elements described herein is not intended to limit the scope of the invention, unless otherwise specifically defined herein. Further, the naming convention used herein is not intended to distinguish between components that differ in name but not function. Additionally, in the following discussion and in the claims, the terms “including” and “comprising” are used in an open-ended fashion, and thus should be interpreted to mean “including, but not limited to.” All numerical values in this disclosure may be exact or approximate values unless otherwise specifically stated. Accordingly, various embodiments of the disclosure may deviate from the numbers, values, and ranges disclosed herein without departing from the intended scope. Furthermore, as it is used in the claims or specification, the term “or” is intended to encompass both exclusive and inclusive cases, i.e., “A or B” is intended to be synonymous with “at least one of A and B,” unless otherwise expressly specified herein.
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FIG. 1 illustrates anexemplary system 100 for cooling a compressed working fluid, according to one or more disclosed embodiments. Thesystem 100 includes acompressor 102, such as a multi-stage compressor, that has a series ofcompression stages compressor 102 is a centrifugal compressor and may form an integral part of an industrial compression system. In other embodiments, thecompressor 102 may be an axial or reciprocating compressor. While only four compression stages 104 a-d are illustrated, it will be appreciated that more or less compression stages may be implemented without departing from the scope of the disclosure. For instance, embodiments contemplated herein include as many as eight or ten compression stages. - The
system 100 may employ a continuous cooling strategy including a series ofheat exchangers compression stages compressor 102 assembly. The heat exchangers 106 a-d may any type of heat exchanging device, such as, but not limited to, direct contact heat exchangers, trim coolers, water-cooled heat exchangers, air-cooled heat exchangers, mechanical refrigeration units, combinations thereof, and the like. While only four heat exchangers 106 a-d are illustrated, it will be appreciated that more or less than four may be implemented without departing from the scope of the disclosure. For instance, other embodiments contemplated herein include multiple heat exchangers interposed between each compression stage 104 a-d. - The
system 100 employs an evaporative cooling strategy including at least onevalve 108 and at least onefogging device 110. Thevalve 108 may be a throttling valve such as an expansion valve. In other embodiments, thevalve 108 may be an expander or a turbine configured to recover a portion of power through the expansion of the compressed working fluid. Thefogging device 110 may be configured to convert the working fluid into a “fog,” or atomized droplets, for injection into a target compression stage, such as the succeedingfourth compressor stage 104 d. To atomize the fluid and generate the fog, a high-pressure atomizing nozzle 112 may be employed within thefogging device 110. In at least one embodiment, theatomizing nozzle 112 may be operable at pressures ranging from about 7,000 KPa to about 20,000 KPa. It will be appreciated, however, that the operable pressure ranges for theatomizing nozzle 112 may vary as a function of the gas properties. Also, while only one evaporative cooling strategy is depicted inFIG. 1 , embodiments contemplated herein include having two or more evaporative cooling strategies implemented in thesame compressor 102, without departing from the scope of the disclosure. - In exemplary operation, a working fluid to be compressed and/or conveyed is introduced into the
system 100 and thecompressor 102 vialine 114. The working fluid may be a compressible gas such as, but not limited to, carbon dioxide (CO2). Thefirst compression stage 104 a compresses the incoming working fluid, thereby increasing both the pressure and the temperature of the working fluid. The suction pressure of the succeeding compression stage (i.e., thesecond compression stage 104 b) is directly affected by its suction temperature. A cooler suction temperature will demand less power to operate the compression stage for the same mass flow to reach the same discharge pressure. Accordingly, in order to maintain a substantially iso-thermal compression process within thecompressor 102, and thereby maintain or otherwise improve compressor efficiency, thefirst compression stage 104 a conveys the working fluid to thefirst heat exchanger 106 a where the temperature of the working fluid is decreased to at or about ambient temperature. - Once cooled in the
first heat exchanger 106 a, the working fluid may then be discharged to thesecond compression stage 104 b and subsequentsecond heat exchanger 106 b, where the compression and cooling process is generally repeated. As depicted, similar compression/cooling processes are repeated a third and a fourth time in thethird compression stage 104 c andthird heat exchanger 106 c, and thefourth compression stage 104 d andfourth heat exchanger 106 d, respectively. Thecompressor 102 then discharges a compressed working fluid vialine 107 to be used, for example, in downstream applications. In one embodiment, downstream applications may include carbon dioxide sequestration and/or storage. - Lowering the working fluid temperature, especially below ambient temperature, prior to any of the compression stages 104 a-d reduces the total amount of compression work required and thereby increases the efficiency of the
compressor 102. For example, in order to lower the temperature of the working fluid to below ambient temperature for thefourth compression stage 104 d, a portion of the working fluid discharged from thefourth heat exchanger 106 d may be extracted as a recycled working fluid and directed intoline 116. The extracted working fluid may be throttled through thevalve 108 to bring the recycle working fluid to its saturated liquid state, resulting in a liquid or partially-liquid recycle working fluid discharged intoline 118. Throttling the recycle working fluid through thevalve 108 may be configured to reduce the static pressure of the recycle working fluid to at or near the suction inlet pressure of thefourth compression stage 104 d. - The recycle working fluid in
line 118 may then be introduced to thefogging device 110 which is fluidly coupled to a target compression stage, i.e., the compression stage that is to be evaporatively cooled. In the illustrated embodiment, thefogging device 110 is arranged to evaporatively cool the working fluid discharged from thethird heat exchanger 106 c before the working fluid is introduced into the inlet of thefourth compression stage 104 d. Specifically, theatomizing nozzle 112 disposed within thefogging device 110 receives and atomizes the recycle working fluid derived fromline 118. Atomizing the recycle working fluid facilitates its quick evaporation in the presence of the incoming working fluid from thethird heat exchanger 106 c, and thereby cools the incoming working fluid. - In exemplary operation, the
atomizing nozzle 112 may generate a droplet size and general distribution that promotes the evaporation of the droplets before the droplets reach downstream impeller blades or other sensitive parts of the succeeding compression stage (e.g., thefourth compression stage 104 d). As can be appreciated, therefore, atomization of the fluid substantially prevents machinery erosion and/or rotordynamic vibrational issues. - Referring to
FIG. 2 , depicted is a representative pressure versus enthalpy diagram 200 for thesystem 100 as generally described above. The diagram 200 depicts athermodynamic phase dome 202 corresponding to a working fluid that can be used in thesystem 100. For instance, thephase dome 202 may be representative of CO2. Thephase dome 202 is generally centered around thecritical pressure point 204 of the working fluid, where the saturated liquid and saturated vapor lines meet. Above thecritical point 204 and outside of thephase dome 202, the working fluid exists as a dense gas, while below thecritical point 204 and inside or below thephase dome 202, the working fluid exists as a saturated liquid-vapor. - As depicted in the diagram 200, the working fluid is compressed and cooled in several stages corresponding to the
system 100 described above. For example,line 206 a represents compression of the working fluid in thefirst compression stage 104 a, andline 208 a represents cooling the working fluid in thefirst heat exchanger 106 a. Likewise,lines lines heat exchangers - Embodiments of the
system 100 described herein take advantage of the working fluid being compressed above its critical pressure, or otherwise outside thethermodynamic phase dome 202. Although an evaporative cooling strategy may be implemented at any point during the compression process, in order to maximize the regenerative cooling effect, the working fluid throttled through thevalve 108 should be at or above thecritical pressure point 204 of the working fluid. Since thefourth compression stage 104 d (corresponding to line 206 d) compresses the working fluid to either meet or exceed thecritical pressure point 204, it may be characterized as an “evaporative compression stage,” and evaporative cooling of the working fluid may be effectively undertaken thereafter as generally described above. - Consequently, the dashed
line 210 in the diagram 200 represents the flow of the recycle working fluid vialine 116 as it is throttled through the valve 108 (FIG. 1 ) to a saturated liquid state or saturated liquid-vapor state at or inside thethermodynamic vapor dome 202. It will be appreciated by those skilled in the art that in embodiments employing a turbine in place of thevalve 108, as described above, that the dashedline 210 would proceed along an adiabatic curve. In one or more embodiments, thevalve 108 may be configured to throttle the recycle working fluid to a pressure at or near thesuction inlet pressure 212 of a target compression stage, such as the fourth orevaporative compression stage 104 d (i.e.,line 206 d). - It will be appreciated that the target compression stage may also be the evaporative compression stage itself, as depicted, or any compression stage that precedes the evaporative compression stage. When the conditions of the recycle working fluid are right (e.g., at or above its critical pressure point 204), the recycle working fluid may be throttled and then subsequently atomized and injected back into the target compression stage using the
atomizing nozzle 112 disposed within the fogging device 110 (FIG. 1 ). As the recycle working fluid is ejected from theatomizing nozzle 112, it quickly evaporates and provides regenerative cooling to the target compression stage which lowers the temperature of the working fluid below ambient temperature. - Evaporatively cooling the working fluid lowers the inlet temperature for any succeeding compression stages, and thereby reduces the total amount of work required during the compression process. Consequently, even taking into account the additional work required to re-compress the recycled working fluid and the increase in mass flowrate for succeeding compression stages, the overall power requirement demand for the
system 100 is notably lowered, therefore increasing its overall efficiency. - Referring now to
FIG. 3 , depicted is anotherexemplary system 300 for cooling a compressed gas, according to embodiments described herein. In some respects, thesystem 300 may be substantially similar to thesystem 100 ofFIG. 1 . As such,FIG. 3 may be best understood with reference toFIG. 1 where like numerals represent like components that will not be described again in detail. Similar toFIG. 1 , thesystem 300 ofFIG. 3 includes amulti-stage compressor 102 having a series of compression stages 104 a-d alternatingly interposed by a corresponding series of heat exchangers 106 a-d. As illustrated, however, the evaporative cooling strategy, including thevalve 108 and thefogging device 110, may target thethird compression stage 104 c, thereby characterizing thethird compression stage 104 c as the evaporative compression stage. As will be described in more detail below, any compression stage that successfully compresses the working fluid to at or above the critical pressure of the working fluid may be characterized as the evaporative compression stage. - The working fluid is introduced into the
system 300 vialine 114 and directed to thefirst compression stage 104 a to compress the working fluid. In order to maintain at least a substantially iso-thermal compression process, thefirst compression stage 104 a may be configured to convey the working fluid to thefirst heat exchanger 106 a where the temperature of the working fluid decreased to at or around ambient temperature. Once cooled, the working fluid may then be discharged from thefirst heat exchanger 106 a, and the process may be repeated in succeedingcompression stages heat exchangers - A portion of the working fluid discharged from the
third heat exchanger 106 c may be separated intoline 302 as the recycle working fluid. The recycle working fluid is then throttled to its saturated liquid-vapor state using thevalve 108 and directed to thefogging device 110 vialine 304 as a liquid or partially-liquid recycle working fluid. After being atomized by theatomizing nozzle 112 disposed within thefogging device 110, the recycle working fluid evaporates in the presence of the incoming working fluid from thesecond heat exchanger 106 b, thereby evaporatively cooling the incoming working fluid to a temperature below ambient. - Referring to
FIG. 4 , depicted is a pressure versus enthalpy diagram 400 for thesystem 300 generally described above. The diagram 400 includes an exemplarythermodynamic phase dome 402 having acritical pressure point 404 corresponding to the working fluid used in thesystem 300. The working fluid is compressed and cooled in several stages corresponding to thesystem 300 described above. For instance,line 406 a represents the compression of the working fluid in thefirst compression stage 104 a, andline 408 a represents the working fluid being cooled in thefirst heat exchanger 106 a. Likewise,lines 406 b-d represent compression of the working fluid in the second, third, and fourth compression stages 104 b-d, respectively, andlines 408 b-d represent cooling of the working fluid inheat exchangers 106 b-d, respectively. - As illustrated, the
third compression stage 104 c (corresponding to line 406 c in the diagram 400) is capable of compressing the working fluid to either meet or exceed thecritical pressure point 404 of the working fluid. Consequently, thethird compression stage 104 c may be used as the evaporative compression stage insystem 300, and evaporative cooling of the working fluid as described herein may be effectively undertaken at any point thereafter. Thus, the dashedline 410 in the diagram 400 represents the flow of the recycle working fluid as it is throttled through the valve 108 (FIG. 3 ) to a saturated liquid-vapor state inside thethermodynamic vapor dome 402. Again, it will be appreciated by those skilled in the art that in embodiments employing a turbine in place of thevalve 108, that the dashedline 410 would proceed along an adiabatic curve. The recycle working fluid may be throttled to asuction inlet pressure 412 of a desired target compression stage, or the compression stage where the evaporative cooling is to take place. As illustrated inFIGS. 3 and 4 , the target compression stage may be thethird compression stage 104 c (i.e.,line 406 c). Consequently, thevalve 108 may be configured to throttle the recycle working fluid to at or near thesuction inlet pressure 412 of thethird compression stage 104 c. Again, it will be appreciated that the target compression stage may be the evaporative compression stage itself or any other compression stage that precedes the evaporative compression stage. - The recycle working fluid may then be atomized and injected back into the working fluid at the
third compression stage 104 c vialine 406 c using theatomizing nozzle 112 disposed within the fogging device 110 (FIG. 3 ). As the recycle working fluid is ejected from theatomizing nozzle 112, it evaporatively cools the target compression stage, which allows the temperature of the working fluid to be lowered below ambient. - Referring now to
FIG. 5 , illustrated is a flow chart of amethod 500 for cooling a working fluid. Themethod 500 may include injecting a working fluid into a compressor, as at 502. The working fluid may be compressed in a series of compression stages arranged in the compressor, as at 504. In at least one embodiment, one of the series of compression stages may be an evaporative compression stage that compresses the working fluid to at least its critical pressure. The working fluid may then be cooled in a series of heat exchangers fluidly coupled to the series of compression stages, as at 506. In one or more embodiments, at least one heat exchanger is interposed between each compression stage. Moreover, each heat exchanger may be configured to decrease the temperature of the working fluid discharged from a preceding compression stage to at or near ambient temperature. A portion of the working fluid may then be throttled to at least its saturated liquid-vapor state, as at 508. The portion of the working fluid may be throttled using a valve fluidly coupled to a heat exchanger following the evaporative compression stage. In other embodiments, the working fluid is throttled using an expander or turbine. The portion of the working fluid may then be atomized with a fogging device fluidly coupled to both the valve and at least one compression stage, as at 510, such as a target compression stage. The working fluid entering the at least one compression stage may then be evaporatively cooled through evaporative cooling of the throttled portion of the working fluid, as at 512. - The foregoing has outlined features of several embodiments so that those skilled in the art may better understand the present disclosure. Those skilled in the art should appreciate that they may readily use the present disclosure as a basis for designing or modifying other processes and structures for carrying out the same purposes and/or achieving the same advantages of the embodiments introduced herein. Those skilled in the art should also realize that such equivalent constructions do not depart from the spirit and scope of the present disclosure, and that they may make various changes, substitutions and alterations herein without departing from the spirit and scope of the present disclosure.
Claims (21)
1. A system for cooling a compressed working fluid, comprising:
a compressor having a series of compression stages for compressing a working fluid, the series of compression stages including an evaporative compression stage and a target compression stage, wherein the evaporative compression stage compresses the working fluid to at least a critical pressure;
a series of heat exchangers fluidly coupled to the series of compression stages such that at least one heat exchanger interposes adjacent compression stages, the series of heat exchangers being configured to decrease a temperature of the working fluid discharged from a preceding compression stage;
a valve fluidly coupled to a heat exchanger following the evaporative compression stage, the valve being configured to throttle a portion of the working fluid to at least its saturated liquid-vapor state; and
a fogging device fluidly coupled to the valve and the target compression stage, the fogging device being configured to evaporate the portion of the working fluid to evaporatively cool the working fluid entering the target compression stage.
2. The system of claim 1 , wherein the compressor is a centrifugal compressor.
3. The system of claim 1 , wherein the working fluid is carbon dioxide.
4. The system of claim 1 , wherein the series of heat exchangers are water-cooled or air-cooled heat exchangers.
5. The system of claim 1 , wherein the series of heat exchangers are configured to reduce the temperature of the working fluid to at or near ambient temperature.
6. The system of claim 1 , wherein the valve further throttles the portion of the working fluid to at or near a suction pressure of the target compression stage.
7. The system of claim 1 , wherein the fogging device has an atomizing nozzle that atomizes the portion of the working fluid in the presence of the working fluid.
8. The system of claim 7 , wherein the fogging device reduces the temperature of the working fluid to below ambient temperature.
9. The system of claim 1 , wherein the evaporative compression stage and the target compression stage are the same compression stage.
10. A method of cooling a compressed working fluid, comprising:
compressing a working fluid in a series of compression stages, the series of compression stages including an evaporative compression stage and a target compression stage;
cooling the working fluid in a series of heat exchangers fluidly coupled to the series of compression stages, wherein at least one heat exchanger is interposed between each compression stage and each heat exchanger is configured to decrease a temperature of the working fluid discharged from a preceding compression stage;
compressing the working fluid to at least a critical pressure in the evaporative compression stage;
throttling a portion of the working fluid discharged from the evaporative compression stage with a valve fluidly coupled to the evaporative compression stage, the portion of the working fluid being throttled to at least its saturated liquid-vapor state; and
atomizing the portion of the working fluid with a fogging device fluidly coupled to the valve and the target compression stage, whereby the portion of the working fluid evaporates and cools the working fluid entering the target compression stage.
11. The method of claim 10 , wherein cooling the working fluid in a series of heat exchangers further comprises cooling the working fluid discharged from a preceding compression stage to at or near ambient temperature.
12. The method of claim 10 , further comprising throttling the portion of the working fluid to at or near a suction pressure of the target compression stage.
13. The method of claim 10 , wherein the fogging device comprises an atomizing nozzle.
14. The method of claim 13 , further comprising atomizing the portion of the working fluid with the atomizing nozzle.
15. The method of claim 10 , further comprising evaporatively cooling the working fluid entering the target compression stage to below ambient temperature.
16. A method of cooling a working fluid in a compressor, comprising:
compressing the working fluid above a critical pressure in a first compression stage to generate a compressed working fluid;
throttling a portion of the compressed working fluid to its saturated liquid-vapor state to generate a recycle working fluid;
atomizing the recycle working fluid with an atomizing nozzle whereby the recycle working fluid evaporates and cools; and
injecting the recycle working fluid at a suction inlet of a target compression stage to cool the working fluid therein.
17. The method of claim 16 , wherein the working fluid is carbon dioxide.
18. The method of claim 16 , further comprising throttling the portion of the compressed working fluid to at or near a suction pressure of the second compression stage.
19. The method of claim 16 , wherein the target compression stage is the first compression stage.
20. The method of claim 16 , further comprising cooling the working fluid entering the second compression stage to below ambient temperature.
21-37. (canceled)
Priority Applications (1)
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US13/818,350 US20130333403A1 (en) | 2010-08-23 | 2011-07-29 | Process for throttling a compressed gas for evaporative cooling |
Applications Claiming Priority (3)
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US37613310P | 2010-08-23 | 2010-08-23 | |
PCT/US2011/045831 WO2012027063A1 (en) | 2010-08-23 | 2011-07-29 | Process for throttling a compressed gas for evaporative cooling |
US13/818,350 US20130333403A1 (en) | 2010-08-23 | 2011-07-29 | Process for throttling a compressed gas for evaporative cooling |
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US20130333403A1 true US20130333403A1 (en) | 2013-12-19 |
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US13/818,350 Abandoned US20130333403A1 (en) | 2010-08-23 | 2011-07-29 | Process for throttling a compressed gas for evaporative cooling |
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US (1) | US20130333403A1 (en) |
EP (1) | EP2609379B1 (en) |
WO (1) | WO2012027063A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108884836A (en) * | 2016-02-19 | 2018-11-23 | 林德股份公司 | The method of implements spatial scalable compression gas |
Families Citing this family (1)
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US8585464B2 (en) | 2009-10-07 | 2013-11-19 | Dresser-Rand Company | Lapping system and method for lapping a valve face |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4454720A (en) * | 1982-03-22 | 1984-06-19 | Mechanical Technology Incorporated | Heat pump |
US5394709A (en) * | 1991-03-01 | 1995-03-07 | Sinvent A/S | Thermodynamic systems including gear type machines for compression or expansion of gases and vapors |
US5533339A (en) * | 1994-05-27 | 1996-07-09 | The Boc Group Plc | Air separation |
US20020050149A1 (en) * | 2000-10-13 | 2002-05-02 | Mitsubishi Heavy Industries, Ltd. | Multistage compression refrigerating machine for supplying refrigerant from intercooler to cool rotating machine and lubricating oil |
US6923011B2 (en) * | 2003-09-02 | 2005-08-02 | Tecumseh Products Company | Multi-stage vapor compression system with intermediate pressure vessel |
US7069733B2 (en) * | 2003-07-30 | 2006-07-04 | Air Products And Chemicals, Inc. | Utilization of bogdown of single-shaft gas turbines to minimize relief flows in baseload LNG plants |
US20070232706A1 (en) * | 2006-04-03 | 2007-10-04 | Shah Minish M | Carbon dioxide production method |
US20080247885A1 (en) * | 2005-05-02 | 2008-10-09 | Hagen David L | West Compression Apparatus and Method |
US20100192890A1 (en) * | 2008-09-23 | 2010-08-05 | Alexander Nelson Brooks | Cold fuel cooling of intercooler and aftercooler |
US20100223939A1 (en) * | 2006-03-27 | 2010-09-09 | Biswajit Mitra | Refrigerating system with parallel staged economizer circuits discharging to interstage pressures of a main compressor |
US20110185767A1 (en) * | 2006-08-17 | 2011-08-04 | Marco Dick Jager | Method and apparatus for liquefying a hydrocarbon-containing feed stream |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5282726A (en) * | 1991-06-21 | 1994-02-01 | Praxair Technology, Inc. | Compressor supercharger with evaporative cooler |
JP2000146326A (en) * | 1998-11-09 | 2000-05-26 | Ishikawajima Harima Heavy Ind Co Ltd | Vapor compressing refrigerating machine |
JP2002188865A (en) * | 2000-10-13 | 2002-07-05 | Mitsubishi Heavy Ind Ltd | Multiple stage compression type refrigerating machine |
DE10393450D2 (en) * | 2002-07-14 | 2005-07-21 | Rerum Cognitio Ges Fuer Markti | Method for compressing the working fluid in the water-steam combination process |
JP2004300928A (en) * | 2003-03-28 | 2004-10-28 | Tokyo Electric Power Co Inc:The | Multistage compressor, heat pump and heat utilization device |
WO2007046332A1 (en) * | 2005-10-17 | 2007-04-26 | Mayekawa Mfg. Co., Ltd. | Co2 refrigerator |
JP2007178042A (en) | 2005-12-27 | 2007-07-12 | Mitsubishi Electric Corp | Supercritical vapor compression type refrigerating cycle and cooling and heating air conditioning facility and heat pump hot-water supply machine using it |
JP4779741B2 (en) * | 2006-03-22 | 2011-09-28 | 株式会社日立製作所 | Heat pump system, shaft sealing method of heat pump system, modification method of heat pump system |
US20110094259A1 (en) * | 2007-10-10 | 2011-04-28 | Alexander Lifson | Multi-stage refrigerant system with different compressor types |
JP2010091135A (en) * | 2008-10-03 | 2010-04-22 | Tokyo Electric Power Co Inc:The | Two-stage compression type hot water supply device and method of controlling its start |
-
2011
- 2011-07-29 EP EP11820339.7A patent/EP2609379B1/en not_active Not-in-force
- 2011-07-29 WO PCT/US2011/045831 patent/WO2012027063A1/en active Search and Examination
- 2011-07-29 US US13/818,350 patent/US20130333403A1/en not_active Abandoned
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4454720A (en) * | 1982-03-22 | 1984-06-19 | Mechanical Technology Incorporated | Heat pump |
US5394709A (en) * | 1991-03-01 | 1995-03-07 | Sinvent A/S | Thermodynamic systems including gear type machines for compression or expansion of gases and vapors |
US5533339A (en) * | 1994-05-27 | 1996-07-09 | The Boc Group Plc | Air separation |
US20020050149A1 (en) * | 2000-10-13 | 2002-05-02 | Mitsubishi Heavy Industries, Ltd. | Multistage compression refrigerating machine for supplying refrigerant from intercooler to cool rotating machine and lubricating oil |
US7069733B2 (en) * | 2003-07-30 | 2006-07-04 | Air Products And Chemicals, Inc. | Utilization of bogdown of single-shaft gas turbines to minimize relief flows in baseload LNG plants |
US6923011B2 (en) * | 2003-09-02 | 2005-08-02 | Tecumseh Products Company | Multi-stage vapor compression system with intermediate pressure vessel |
US20080247885A1 (en) * | 2005-05-02 | 2008-10-09 | Hagen David L | West Compression Apparatus and Method |
US20100223939A1 (en) * | 2006-03-27 | 2010-09-09 | Biswajit Mitra | Refrigerating system with parallel staged economizer circuits discharging to interstage pressures of a main compressor |
US20070232706A1 (en) * | 2006-04-03 | 2007-10-04 | Shah Minish M | Carbon dioxide production method |
US20110185767A1 (en) * | 2006-08-17 | 2011-08-04 | Marco Dick Jager | Method and apparatus for liquefying a hydrocarbon-containing feed stream |
US20100192890A1 (en) * | 2008-09-23 | 2010-08-05 | Alexander Nelson Brooks | Cold fuel cooling of intercooler and aftercooler |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108884836A (en) * | 2016-02-19 | 2018-11-23 | 林德股份公司 | The method of implements spatial scalable compression gas |
CN108884836B (en) * | 2016-02-19 | 2020-08-11 | 林德股份公司 | Method for staged compression of gases |
TWI708013B (en) * | 2016-02-19 | 2020-10-21 | 德商林德股份有限公司 | Method for compressing a gas in stages |
Also Published As
Publication number | Publication date |
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EP2609379B1 (en) | 2018-10-03 |
WO2012027063A1 (en) | 2012-03-01 |
EP2609379A4 (en) | 2016-07-27 |
EP2609379A1 (en) | 2013-07-03 |
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