US20210033083A1 - Method for operating a compressor, and compressor - Google Patents

Method for operating a compressor, and compressor Download PDF

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Publication number
US20210033083A1
US20210033083A1 US16/640,777 US201816640777A US2021033083A1 US 20210033083 A1 US20210033083 A1 US 20210033083A1 US 201816640777 A US201816640777 A US 201816640777A US 2021033083 A1 US2021033083 A1 US 2021033083A1
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US
United States
Prior art keywords
compressor
voltage
counter
ionic liquid
electrochemical element
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.)
Abandoned
Application number
US16/640,777
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English (en)
Inventor
Robert Adler
Sascha Dorner
Christoph Nagl
Georg Fahrthofer
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.)
Linde GmbH
Original Assignee
Linde GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Linde GmbH filed Critical Linde GmbH
Assigned to LINDE AKTIENGESELLSCHAFT reassignment LINDE AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ADLER, ROBERT, DORNER, SASCHA, Fahrthofer, Georg, Nagl, Christoph
Publication of US20210033083A1 publication Critical patent/US20210033083A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
    • F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
    • F04B37/18—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use for specific elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/04—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being hot or corrosive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
    • F04B39/0011—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons liquid pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/04—Measures to avoid lubricant contaminating the pumped fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2210/00—Fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2210/00—Fluid
    • F04C2210/24—Fluid mixed, e.g. two-phase fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2210/00—Fluid
    • F04C2210/40—Properties

Definitions

  • the invention relates to a method for operating a compressor in which an ionic liquid is used as the operating fluid, and to such a compressor.
  • Compressors are used in particular for compressing gaseous media.
  • the medium can be displaced, for example, by means of an operating fluid in a displacement cylinder.
  • compressors are also referred to as piston-less compressors.
  • An ionic liquid can be used as the operating fluid. This is then present in particular in an actual hydraulic oil circuit and in a gas circuit. Ionic liquids have the advantage that they have no or at least no measurable vapor pressure. Therefore, gas can be compressed in the manner described without parts of the operating fluid remaining in the compressed gas, as is the case with conventional operating fluids such as hydraulic oil.
  • Ionic liquids are, in particular, liquid salt, which therefore forms an electrolyte within the compressor or the compressor system. Since, as a rule, different materials are used in such a compressor for different components or parts of the compressor with which the ionic liquid is also in contact, an electrochemical element is formed. In this case, the material or element that is less noble in relation to the electrochemical series is dissolved in the ionic liquid and is degraded or consumed. At another point, this material correspondingly accumulates. Overall, this leads to a reduced service life or running time of the compressor.
  • the object is to provide an option for extending service life or running time of such an ionic compressor.
  • the present invention is based on a method for operating a compressor in which an ionic liquid is used as the operating fluid. If such a compressor has two different materials which are brought into contact with the ionic liquid, an electrochemical element is automatically formed.
  • Suitable ionic liquids in this case are preferably compositions which have one of the following substances:
  • R 1 and R 2 may be, independently of one another, hydrogen or a substituted or unsubstituted C1-C8 alkyl, in particular a substituted or unsubstituted C1-C4 alkyl, wherein the compound according to formula (I) is in particular a 1-ethyl-3-methylimidazolium.
  • each R may be, independently of one another, a substituted or unsubstituted C1-C4 alkyl, wherein the alkyl may in particular be substituted by OH, wherein the compound according to formula (II) is in particular an N,N,N-trimethylethylammonium or a tris(2-hydroxyethyl)-methylammonium.
  • composition can likewise have a counter-ion, in particular Cl ⁇ .
  • Suitable materials are, for example, iron (or steel), aluminum and zinc.
  • a counter-voltage is applied to the compressor at least for partially equalizing a voltage of the electrochemical element. It is particularly useful to equalize the voltage as completely as possible, but at least, for example, 80%, in particular 90%.
  • counter-voltage By applying such a counter-voltage, current (that is to say external current) is thus externally introduced into the compressor, and thus the dissolution of the correspondingly less noble material or element is counteracted or even stopped. It goes without saying that such a counter-voltage can be applied not only once between two materials, but also between additional pairs of materials when there are additional different materials.
  • the counter-voltage can be generated by a suitable voltage source and can be applied at suitable points in the compressor or the corresponding components or parts.
  • the voltage of the electrochemical element is measured and the counter-voltage is set based thereon.
  • a suitable measuring device can be provided which, for example, detects the applied voltage at suitable points of the various materials. This then enables a particularly precise setting or specification of the counter-voltage and thus a compensation of the voltage caused by the electrochemical element which is as extensive as possible. This ultimately leads to minimal wear of the materials of the compressor and thus of the compressor as a whole.
  • the counter-voltage is also preferred for the counter-voltage to be set as part of a regulation. In this way, possible deviations during operation of the compressor can be equalized.
  • a reciprocating compressor and/or a multistage compressor is preferably used as the compressor, in particular, for example, a multistage reciprocating compressor.
  • Such compressors are relatively simple in design, but nevertheless benefit from the advantages of the ionic liquid as the operating fluid.
  • screw compressors, scroll compressors, rotary compressors, or compressors in which two-phase mixtures can be used are suitable.
  • a gas in particular hydrogen, or a gas mixture is compressed by means of the compressor.
  • the use of the ionic liquid yields the advantage that no residues of this liquid remain in compressed gas and thus a particularly pure, compressed gas can be obtained. This is of particular interest especially in the case of hydrogen, since hydrogen is used, for example, for drives, in particular with fuel cells.
  • the subject matter of the invention is further a compressor in which an ionic liquid is provided as the operating fluid, and in which two different materials of the compressor are in contact with the ionic liquid and form an electrochemical element.
  • an ionic compressor in which two different materials of the compressor are in contact with the ionic liquid and form an electrochemical element.
  • a voltage source is now provided, with which a counter-voltage can be applied to the compressor at least for partially equalizing a voltage of the electrochemical element.
  • a measuring device is also provided for measuring the voltage of the electrochemical element, wherein the voltage source is configured to set the counter-voltage on the basis of the measured voltage.
  • control and/or regulating unit is provided for setting and/or regulating the counter-voltage. It is also advantageous if the compressor is configured as a reciprocating compressor and/or with multiple stages.
  • FIG. 1 schematically shows a compressor according to the invention in a preferred embodiment, which is suitable for carrying out a method according to the invention.
  • FIG. 1 shows a compressor 100 according to the invention in a preferred embodiment.
  • the compressor has five cylinders 110 , 111 , 112 , 113 and 114 and an additional chamber 150 .
  • the cylinder 110 has a movable piston 120 as well as an inlet valve 140 and an outlet valve 141 , wherein these two valves are each arranged in a cylinder head 130 .
  • the additional four cylinders are of similar design, but for the sake of clarity no reference numerals are shown here. It should also be noted that the additional cylinders 111 to 114 are smaller than the cylinder 110 in order to allow a corresponding stage-like compression.
  • the respective pistons can be moved, for example, via a suitable drive according to the prior art (not shown here).
  • a gas b for example hydrogen
  • gas compressed within the cylinder 110 can then be directed into the next cylinder 111 via a pipeline 120 (or another suitable connection). Via additional such pipelines, the still further compressed gas can finally be guided into the chamber 150 and from there out of the compressor 100 via an outlet 122 .
  • a sealable connecting line 123 is provided from the inlet 121 to the chamber 150 .
  • the chamber 150 serves to separate the ionic liquid from the gas stream; the connecting line 123 permits a flow of liquid due to the pressure difference between the first and last compressor stages, as a result of which a targeted injection of ionic liquid into the gas stream is possible.
  • an ionic liquid a is now provided as the operating fluid.
  • a property of this ionic liquid that no residue remains in the gas during the compression of the gas b. As already mentioned at the outset, this is due to the fact that an ionic liquid has no or at least no measurable vapor pressure.
  • a measuring device 160 is now provided, by means of which, for example, a voltage U between the piston 120 and the cylinder 110 or its wall is measured in this case.
  • a voltage U between the piston 120 and the cylinder 110 or its wall is measured in this case.
  • the piston 120 and the cylinder 110 or its wall are made of different materials, these two materials form an electrochemical cell with a measurable—here by means of the measuring device 160 —voltage U.
  • the cylinder 110 or its wall can be made of steel (denoted by c), whereas the piston 120 can be made of aluminum (denoted by d).
  • a voltage source 170 which can in particular also be part of a control and/or regulating unit, is now provided.
  • this voltage source 170 it is now possible to apply a counter-voltage U G to the compressor, in this case between the piston 120 and the cylinder 110 or its wall, so that a current I G flows.
  • the counter-voltage can now be matched as precisely as possible to the measured voltage so that, as a result, there is no or at least a significantly lower voltage between the corresponding components or parts of the compressor, thus preventing or at least reducing a dissolution of the one material in the ionic liquid. This correspondingly increases the service life of the compressor 110 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Rotary Pumps (AREA)
US16/640,777 2017-08-22 2018-08-01 Method for operating a compressor, and compressor Abandoned US20210033083A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE102017007921.8A DE102017007921A1 (de) 2017-08-22 2017-08-22 Verfahren zum Betreiben eines Verdichters und Verdichter
DE102017007921.8 2017-08-22
EP17020403.6A EP3447289B1 (de) 2017-08-22 2017-09-05 Verfahren zum betreiben eines verdichters und verdichter
EP17020403.6 2017-09-05
PCT/EP2018/025207 WO2019037894A1 (de) 2017-08-22 2018-08-01 Verfahren zum betreiben eines verdichters und verdichter

Publications (1)

Publication Number Publication Date
US20210033083A1 true US20210033083A1 (en) 2021-02-04

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Family Applications (1)

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US16/640,777 Abandoned US20210033083A1 (en) 2017-08-22 2018-08-01 Method for operating a compressor, and compressor

Country Status (6)

Country Link
US (1) US20210033083A1 (ko)
EP (1) EP3447289B1 (ko)
KR (1) KR102560641B1 (ko)
CN (1) CN110998092B (ko)
DE (1) DE102017007921A1 (ko)
WO (1) WO2019037894A1 (ko)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4061983A1 (de) 2019-11-21 2022-09-28 EEG Elements Energy GmbH Elektrolysevorrichtung
KR102503493B1 (ko) 2021-06-14 2023-02-28 (주)부흥산업사 이온성액체를 사용한 압축기 구조
KR102662208B1 (ko) 2022-03-25 2024-05-03 (주)부흥산업사 이온성액체가 함유된 피스톤 링 제조방법 및 이를 사용한 압축기 혹은 진공펌프 구조

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4618921B2 (ja) 2001-03-30 2011-01-26 株式会社鶴見製作所 水中回転機械における主軸の電食防止構造
CN100549150C (zh) * 2003-10-10 2009-10-14 出光兴产株式会社 润滑油
EP1794458A1 (de) * 2004-09-17 2007-06-13 Basf Aktiengesellschaft Verfahren zum betrieb eines flüssigringverdichters
DE102004046316A1 (de) * 2004-09-24 2006-03-30 Linde Ag Verfahren und Vorrichtung zum Verdichten eines gasförmigen Mediums
KR100540390B1 (ko) 2005-09-23 2006-01-11 주식회사 삼진정밀 공기배출기능을 갖는 쓰리웨이밸브가 구비된 부식방지용제수밸브
DE102006042918A1 (de) * 2006-09-13 2008-03-27 Linde Ag Kolbenloser Verdichter
DE102009020925A1 (de) * 2009-05-12 2010-11-18 Linde Aktiengesellschaft Verdichter mit Kolbendummy
DE102011101504A1 (de) * 2011-05-13 2012-11-15 Linde Ag Verdichtung eines mit Wasser gesättigten Mediums
WO2014109271A1 (en) * 2013-01-14 2014-07-17 Semiconductor Energy Laboratory Co., Ltd. Electrochemical device
DE102013212725A1 (de) 2013-06-28 2014-12-31 Ksb Aktiengesellschaft Fluidführendes System mit kathodischem Korrosionsschutz

Also Published As

Publication number Publication date
WO2019037894A1 (de) 2019-02-28
CN110998092A (zh) 2020-04-10
EP3447289B1 (de) 2019-12-18
CN110998092B (zh) 2023-06-27
KR20200045469A (ko) 2020-05-04
KR102560641B1 (ko) 2023-07-26
EP3447289A1 (de) 2019-02-27
DE102017007921A1 (de) 2019-02-28

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Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ADLER, ROBERT;DORNER, SASCHA;NAGL, CHRISTOPH;AND OTHERS;REEL/FRAME:051884/0501

Effective date: 20200217

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Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION