EP4034768B1 - Unité de moteur-compresseur intégrée ayant un circuit de refroidissement et un système de dépressurisation conçu pour réduire la pression du fluide de refroidissement - Google Patents
Unité de moteur-compresseur intégrée ayant un circuit de refroidissement et un système de dépressurisation conçu pour réduire la pression du fluide de refroidissement Download PDFInfo
- Publication number
- EP4034768B1 EP4034768B1 EP19780025.3A EP19780025A EP4034768B1 EP 4034768 B1 EP4034768 B1 EP 4034768B1 EP 19780025 A EP19780025 A EP 19780025A EP 4034768 B1 EP4034768 B1 EP 4034768B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- motor
- compressor
- cooling
- compressor unit
- cooling circuit
- 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.)
- Active
Links
- 238000001816 cooling Methods 0.000 title claims description 31
- 239000012809 cooling fluid Substances 0.000 title claims description 10
- 239000012530 fluid Substances 0.000 claims description 7
- 239000007789 gas Substances 0.000 description 23
- 238000000034 method Methods 0.000 description 20
- 238000007906 compression Methods 0.000 description 4
- 239000000112 cooling gas Substances 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 230000002747 voluntary effect Effects 0.000 description 1
Images
Classifications
-
- 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
- F04D29/5806—Cooling the drive system
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
Definitions
- the field of the invention relates to integrated motor-compressor units for processing a working fluid, and more particularly to an integrated motor-compressor having a cooling system.
- a motor-compressor unit comprises a centrifugal compressor and a motor integrated in a common housing.
- a centrifugal compressor with multiple compression stages generally comprises a plurality of impellers supported by a driven shaft coupled to a rotor driven by a motor or a turbine in order to generate a flow of compressed process gas.
- the shaft used to directly drive such a centrifugal compressor is required to rotate at relatively high speeds which generate heat. Furthermore, operating the motor-compressor at high speeds increases windage frictional losses resulting from components operating in pressurized gas.
- a cooling circuit which may be an open loop cooling circuit or a quasi-closed loop cooling circuit where gas is drawn from the process stream at some point in the compression process. The process gas is then circulated through the motor and the bearings to absorb heat.
- the cooling gas may be driven by a pressure difference between the source of the cooling gas and the place where the gas is allowed to flow to.
- One benefit afforded by embodiments of the integrated motor-compressor unit described herein is to reduce windage losses.
- windage losses may be high, especially for compressors with high suction pressure.
- a depressurization system for an integrated motor-compressor unit according to claim 1, having a motor and a compressor coupled to said motor.
- the depressurization system is configured to depressurize the pressure of the motor.
- an integrated motor-compressor unit configured to process a working fluid, such as for example gas, and comprising a motor and a compressor coupled to said motor via a rotatable shaft and mounted in a single common housing, a cooling fluid is circulated throughout said housing in a cooling circuit.
- a working fluid such as for example gas
- the integrated motor-compressor unit comprises a depressurization system configured to depressurize the pressure of the motor.
- the depressurization system is thus configured to reduce pressure of the cooling fluid circulating in the cooling circuit.
- Such a depressurization system creates a significant pressure drop of at least 10 bars.
- the efficiency of the motor is thus significantly increased.
- the depressurization system comprises an expansion device before the cooling circuit, and an auxiliary compressor after the cooling circuit, configured to recover the suction pressure.
- the expansion device is a cooling expansion valve configured to receive the working fluid via a main compressor suction inlet of the compressor and to transmit expanded cooled fluid to the cooling circuit, and the auxiliary compressor is configured to receive the cooling fluid after having cooled notably the motor and/or the bearings and to compress the cooling fluid.
- the motor rotates the shaft and thereby drives the compressor.
- a process gas to be compressed is introduced via a main compressor suction inlet provided in the housing.
- the compressor then compresses the process gas through successive stages of impellers to thereby produce a compressed process gas.
- the compressed process gas then exits the compressor via a process discharge outlet provided in the housing.
- the Figures very schematically illustrate an integrated motor-compressor unit 10 configured to process a working fluid, such as gas.
- the integrated motor-compressor unit 10 comprises a motor 12 and a compressor 14 coupled to said motor 12 via a rotatable shaft 16 and mounted in a single common housing 18 configured to circulate a cooling fluid in a cooling circuit 27.
- the integrated motor-compressor unit 10 further comprises a depressurization system 30 configured to depressurize the pressure of the motor 12 and thus configured to reduce pressure of the cooling circulating in the cooling circuit.
- Such a depressurization system 30 creates a significant pressure drop of at least 10 bars.
- the efficiency of the motor 12 is thus significantly increased thanks to such pressure drop.
- the shaft extends substantially the whole length of the housing 18 and comprises a motor section 17 coupled to the motor 12 and a driven section 19 coupled to the compressor 14.
- the motor section 17 and the driven section 19 of the rotatable shaft 16 are connected via a coupling 20, such as for example a flexible or rigid coupling.
- the motor section 17 and the driven section 19 are supported at each end, respectively, by one or more radial bearings 22.
- radial bearings 22 As way of a non-limitative example, four sets of radial bearings 22 are shown.
- the bearings 22 may be directly or indirectly supported by the housing 18.
- the motor 12 may be an electric motor, such as a permanent magnet motor having permanent magnets mounted on the rotor (not depicted on the figures) and a stator (not depicted on the figures).
- an electric motor such as a permanent magnet motor having permanent magnets mounted on the rotor (not depicted on the figures) and a stator (not depicted on the figures).
- other types of electric motors such as for example synchronous, induction, brushed DC motors, etc.
- the compressor 14 may be a multi-stage centrifugal compressor with one or more compressor stage impellers (not shown).
- a cooling gas is circulated throughout the housing 18 in the cooling circuit 27 having cooling conducts 28 and hot conducts 29.
- the depressurization system 30 comprises an expansion device 32 before the cooling circuit 27 and an auxiliary compressor 34 after the cooling circuit 27 configured to recover the suction pressure.
- FIG. 1 A first embodiment of the depressurization system 30 according to the claimed invention is shown on Figure 1 .
- the expansion device 32 is a cooling expansion valve receiving process gas via the main compressor suction inlet 24 and transmitting expanded cooled process gas to the cooling circuit 27.
- the auxiliary compressor 34 receives the cooling fluid after having cooled the bearings 22 and the motor 12 and compresses it before transmitting to the main compressor suction inlet 24.
- the expansion device 32 is an expansion wheel mounted on the motor shaft end.
- the expansion wheel may be mounted on the compressor shaft end, between bearings or on a dedicated turbo-expander.
- the auxiliary compressor 34 is, in this embodiment, mounted on the compressor shaft end.
- the auxiliary compressor 34 may be mounted on the motor shaft end, between bearings, on a dedicated turbo-expander, or on a dedicated compressor.
- the expansion is created by voluntary compressor 14 leakages that are compressed by the auxiliary compressor 34.
- calibrated gas leakages on the compressor end 14 are used to generate the cooling flow.
- the auxiliary compressor 34 is mounted on the motor shaft end.
- the depressurization system 30 comprises a blower device 36 mounted upstream the compressor 14 and configured to circulate the cooling fluid in a closed loop cooling circuit 27.
- the depressurization system 30 further comprises a depressurization auxiliary compressor 34 configured to compensate for the main compressor gas leakages.
- the depressurization system 30 also comprises a cooler 38 mounted on the cooling circuit 27 after the blower device 36.
- the depressurization auxiliary compressor 34 may be a low pressure compressor or a dedicated equipment.
- the motor 12 rotates the shaft 16 and thereby drives the compressor 14.
- a process gas to be compressed is introduced via a main compressor suction inlet 24 provided in the housing 18.
- the compressor 14 then compresses the process gas through successive stages of impellers to thereby produce a compressed process gas.
- the compressed process gas then exits the compressor 14 via a process discharge outlet 26 provided in the housing 18.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Claims (3)
- Système de dépressurisation (30) pour un groupe motocompresseur intégré (10) ayant un moteur (12) et un compresseur (14) couplé audit moteur (12), dans lequel le système de dépressurisation (30) est configuré pour dépressuriser le moteur (12), ledit système comprenant un dispositif de détente (32) et un compresseur auxiliaire (34) configuré pour récupérer la pression d'aspiration, dans lequel le dispositif de détente (32) est un détendeur de refroidissement configuré pour recevoir le fluide de travail via une entrée d'aspiration de compresseur principale (24) du compresseur (14) et pour transmettre un fluide refroidi détendu à un circuit de refroidissement (27) de l'unité motocompresseur intégré (10) et dans lequel le compresseur auxiliaire (34) est configuré pour recevoir le fluide de refroidissement après avoir refroidi notamment le moteur (12) et pour comprimer le fluide de refroidissement.
- Groupe motocompresseur intégré (10) ayant un moteur (12) et un compresseur (14) couplé audit moteur (12) par l'intermédiaire d'un arbre rotatif (16) et monté dans un logement commun unique (18) configuré pour faire circuler un circuit de refroidissement (27), dans lequel l'unité motocompresseur intégré (10) comprend : un système de dépressurisation (30) selon la revendication 1 configuré pour dépressuriser la pression du moteur (12).
- Groupe motocompresseur intégré (10) selon la revendication 2, dans lequel l'arbre rotatif (16) est supporté à chaque extrémité par au moins un palier (22).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IB2019/058026 WO2021058995A1 (fr) | 2019-09-23 | 2019-09-23 | Unité de moteur-compresseur intégrée ayant un circuit de refroidissement et un système de dépressurisation conçu pour réduire la pression du fluide de refroidissement |
Publications (2)
Publication Number | Publication Date |
---|---|
EP4034768A1 EP4034768A1 (fr) | 2022-08-03 |
EP4034768B1 true EP4034768B1 (fr) | 2024-05-01 |
Family
ID=68104720
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19780025.3A Active EP4034768B1 (fr) | 2019-09-23 | 2019-09-23 | Unité de moteur-compresseur intégrée ayant un circuit de refroidissement et un système de dépressurisation conçu pour réduire la pression du fluide de refroidissement |
Country Status (7)
Country | Link |
---|---|
US (1) | US20220372994A1 (fr) |
EP (1) | EP4034768B1 (fr) |
JP (1) | JP7391196B2 (fr) |
CN (1) | CN114641618B (fr) |
BR (1) | BR112022005399A2 (fr) |
CA (1) | CA3151299A1 (fr) |
WO (1) | WO2021058995A1 (fr) |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100421390B1 (ko) * | 2001-11-20 | 2004-03-09 | 엘지전자 주식회사 | 터보 압축기 냉각장치 |
US20070036662A1 (en) * | 2005-08-05 | 2007-02-15 | C.R.F Societa Consortilla Per Azioni | Multistage motor-compressor for the compression of a fluid |
US7508101B2 (en) * | 2006-02-24 | 2009-03-24 | General Electric Company | Methods and apparatus for using an electrical machine to transport fluids through a pipeline |
US20070271956A1 (en) * | 2006-05-23 | 2007-11-29 | Johnson Controls Technology Company | System and method for reducing windage losses in compressor motors |
JP4981557B2 (ja) * | 2007-07-13 | 2012-07-25 | 三菱重工業株式会社 | ターボ圧縮機およびターボ冷凍機 |
US8147178B2 (en) * | 2008-12-23 | 2012-04-03 | General Electric Company | Centrifugal compressor forward thrust and turbine cooling apparatus |
US9200643B2 (en) | 2010-10-27 | 2015-12-01 | Dresser-Rand Company | Method and system for cooling a motor-compressor with a closed-loop cooling circuit |
TWI577949B (zh) * | 2013-02-21 | 2017-04-11 | 強生控制科技公司 | 潤滑及冷卻系統 |
JP6011571B2 (ja) * | 2014-03-19 | 2016-10-19 | 株式会社豊田自動織機 | 電動ターボ式圧縮機 |
ITUB20152564A1 (it) * | 2015-07-28 | 2017-01-28 | Nuovo Pignone Tecnologie Srl | Motocompressore e metodo per migliorare l’efficienza di un motocompressore |
US20170174049A1 (en) * | 2015-12-21 | 2017-06-22 | Ford Global Technologies, Llc | Dynamically controlled vapor compression cooling system with centrifugal compressor |
CN207864270U (zh) * | 2017-10-12 | 2018-09-14 | 江苏神运电气有限公司 | 一种干式变压器用多功能冷却风机 |
-
2019
- 2019-09-23 BR BR112022005399A patent/BR112022005399A2/pt unknown
- 2019-09-23 CN CN201980100679.2A patent/CN114641618B/zh active Active
- 2019-09-23 JP JP2022518184A patent/JP7391196B2/ja active Active
- 2019-09-23 CA CA3151299A patent/CA3151299A1/fr active Pending
- 2019-09-23 US US17/753,929 patent/US20220372994A1/en active Pending
- 2019-09-23 WO PCT/IB2019/058026 patent/WO2021058995A1/fr unknown
- 2019-09-23 EP EP19780025.3A patent/EP4034768B1/fr active Active
Also Published As
Publication number | Publication date |
---|---|
BR112022005399A2 (pt) | 2022-06-21 |
JP7391196B2 (ja) | 2023-12-04 |
CN114641618A (zh) | 2022-06-17 |
JP2022548391A (ja) | 2022-11-18 |
CN114641618B (zh) | 2024-02-23 |
WO2021058995A1 (fr) | 2021-04-01 |
CA3151299A1 (fr) | 2021-04-01 |
EP4034768A1 (fr) | 2022-08-03 |
US20220372994A1 (en) | 2022-11-24 |
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