WO2018007509A1 - Compressor anti-surge protection under wet gas conditions - Google Patents

Compressor anti-surge protection under wet gas conditions Download PDF

Info

Publication number
WO2018007509A1
WO2018007509A1 PCT/EP2017/066909 EP2017066909W WO2018007509A1 WO 2018007509 A1 WO2018007509 A1 WO 2018007509A1 EP 2017066909 W EP2017066909 W EP 2017066909W WO 2018007509 A1 WO2018007509 A1 WO 2018007509A1
Authority
WO
WIPO (PCT)
Prior art keywords
compressor
gas
surge
suction side
suction
Prior art date
Application number
PCT/EP2017/066909
Other languages
English (en)
French (fr)
Inventor
Daniele Galeotti
David Rossi
Alessio CACITTI
Original Assignee
Nuovo Pignone Tecnologie Srl
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 Nuovo Pignone Tecnologie Srl filed Critical Nuovo Pignone Tecnologie Srl
Priority to US16/315,529 priority Critical patent/US20190301478A1/en
Priority to KR1020197002760A priority patent/KR102371876B1/ko
Priority to EP17734763.0A priority patent/EP3482081B1/de
Priority to JP2018567687A priority patent/JP6979977B2/ja
Priority to DK17734763.0T priority patent/DK3482081T3/da
Publication of WO2018007509A1 publication Critical patent/WO2018007509A1/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/02Surge control
    • F04D27/0207Surge control by bleeding, bypassing or recycling fluids
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D31/00Pumping liquids and elastic fluids at the same time
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2210/00Working fluids
    • F05D2210/10Kind or type
    • F05D2210/13Kind or type mixed, e.g. two-phase fluid
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2270/00Control
    • F05D2270/01Purpose of the control system
    • F05D2270/10Purpose of the control system to cope with, or avoid, compressor flow instabilities
    • F05D2270/101Compressor surge or stall

Definitions

  • Embodi- ments disclosed herein specifically relate to wet gas compressors, in particular centrifugal wet gas compressors, which process gas that can contain a liquid phase, e.g. heavy hydrocarbons, water or the like.
  • a liquid phase e.g. heavy hydrocarbons, water or the like.
  • Centrifugal compressors have been designed to process a so-called wet gas, i.e. gas that can contain a certain percentage of a liquid phase.
  • Wet gas processing is often required in the oil and gas industry, where gas extracted from a well, such as a subsea well, can contain a liquid hydrocarbon phase, or water.
  • the presence and percentage amount of a liquid phase in a gas may affect the operation of the compressor and in particular may have an impact on the surge limit, which de- termines the range of safe operation of the compressor.
  • the liquid volume fraction in the gas flow at the suction side of the compressor is not known.
  • Flowmeters capable of determining the liquid volume fraction are cumbersome and expensive and might not be suitable in certain applications in extreme environmental conditions. A need therefore exists, for reliably and efficiently controlling the operation of a wet gas compressor, in particular as far as anti-surge is concerned.
  • a method for anti-surge protection of a compressor under wet gas conditions comprises a suction side and a delivery side.
  • An anti-surge system is arranged between the delivery side and the suction side of the compressor.
  • the method comprises the following steps: calculating a surge limit line in a compression ratio vs. corrected power diagram; determining a compressor operating point in said compression ratio vs. corrected power diagram; detecting a distance between the operating point and the surge limit line; acting on the anti-surge system of the compressor if the distance is below a minimum safety distance.
  • a wet gas compressor system comprising: a compressor having a suction side and a delivery side; an anti-surge control arrangement; a control unit, functionally coupled to the anti-surge control arrangement.
  • the control unit is configured and arranged for performing a method as above defined.
  • the compression ratio vs. corrected power diagram is a diagram wherein the compressor performances are represented as a function of the relationship between the compression ratio over the compressor and the corrected power of the compressor.
  • Fig.1 illustrates a compressor system
  • Fig.2 illustrates a wet gas compressor operating diagram
  • Fig.3 illustrates a flow chart of methods disclosed herein.
  • Fi . 1 schematically illustrates a system 1 comprising a driver 3 and a load 5.
  • the load 5 includes a compressor 7, for instance a centrifugal compressor.
  • a shaft 9 driv ingly connects the driver 3 to the load 5.
  • the driver 3 can be an electric motor, a gas turbine engine, a steam turbine or any other suitable driver.
  • the compressor 7 comprises a compressor suction side 7S and a compressor delivery side 7D.
  • the compressor 7 is further provided with an anti-surge system.
  • the anti-surge system is comprised of a line or duct 1 1 that is fluidly coupled to the delivery side 7D and to the suction side 7S.
  • the anti-surge system comprises an anti-surge valve 13 arranged on the anti-surge line 1 1.
  • the antisurge valve 13 can be controllably opened to recirculate gas from the del ivery s ide 7D to the suction side 7S of compressor 7, to prevent surge phenomena in the compressor, if the operating point of the compressor approaches a surge limit line.
  • a pressure transducer 17 and a temperature transducer 19 are arranged at the suction side 7S of compressor 7, to measure the gas suction pressure Ps and the gas suction temperature Ts of the gas at the suction side IS.
  • a further pressure transducer 19 and a further temperature transducer 21 are arranged at the deliv ery side 7D of compressor 7, to measure the gas delivery pressure Pd and the gas delivery temperature Td.
  • the system 1 further comprises a control unit 23 , which can be functionally coupled to the pressure and temperature transducers 15, 17, 19, 21 to collect measured values of the gas temperature and pressure at the del iv ery side 7D and suction side 7S of compressor 7.
  • the control unit 23 can be further functionally coupled to an actuator 13A configured and arranged for selectively opening and closing the anti-surge valve 13.
  • Reference number 25 generally designates storage memory resources for the control unit 23, which can store data useful for an anti-surge control of the compressor 7, as will be explained in greater detail herein after.
  • the control unit 23 can be configured and arranged for receiving further input information, such as data on the gas processed by compressor 7.
  • Block 27 schematically represents a data input, for instance providing information on the mean molar mass Mw of the gas being processed by compressor 7.
  • Reference number 29 schematically designates one or several further process parameter transducers, which prov ide additional information to the control unit 23, such as for instance the rotational speed N of compressor 7, the driving power W required to drive the compressor 7 into rotation and any additional information which may be useful or necerney for controlling the system 1.
  • Anti-surge control of the compressor 7 can be performed using the diagram of Fi .2.
  • the compression ratio, or pressure ratio, PR of compressor 7 is plotted on the vertical axis of the diagram of Fig. 2.
  • a dimensionless parameter depending upon the absorbed power, i.e. the power required to drive the compressor 7 into rotation, is plotted on the horizontal axis of the diagram of Fig. 2.
  • the dimensionless parameter is a function of the actual driving power W, the suction pressure Ps and the suction temperature Ts of the gas, and can further depend upon parameters of the gas being processed and of characteristics of the compressor.
  • the dimensionless corrected power Wcorr is plotted, defined by the following formula: wherein:
  • W is the actual measured power absorbed by the compressor 7;
  • Ps, Ts are the gas pressure and temperature at the suction side of the compressor 7;
  • Mw is the mean molar mass of the gas processed by compressor 7;
  • Zs is the compressibility of the gas at the compressor suction side;
  • R is the gas constant;
  • kvs is the isentropic volume exponent of the gas at the compressor suction side;
  • a suction limit line SLL can be plotted on the diagram of Fig. 2, which allows anti-surge control of the compressor 7 without requiring knowledge of the actual liquid mass fraction (LMF) or liquid volume fraction (LVF) of the gas, i.e. the mass or volumetric percentage of liquid phase in the wet gas.
  • LMF liquid mass fraction
  • LVF liquid volume fraction
  • the SLL is a function of the gas conditions at the suction side 7S of compressor 7, i.e. of the suction temperature Ts and the suction pressure Ps.
  • the SLL is a function of the rotational speed of compressor 7, as well as of the mean molar mass Mw of the gas and of the compressibility Zs of the gas at the suction side 7S of compressor 7.
  • the chemical composition of the gas processed by compressor 7 usually varies very slowly during time and can be considered quasi-constant over relatively long time spans, e.g. 24 hours.
  • the chemical composition of the gas can be analyzed in-line by flowing a portion of gas through a gas chromatograph. In other embodiments, the gas composition can be analyzed offline, e.g. by taking a gas sample from the gas duct. Irrespective of how the gas is analyzed, the mean molar mass and the compressibility of the gas can be determined.
  • the remaining parameters can be detected by the transducers o system 1 during operation of the compressor 7.
  • the current SLL can be determined, based on features of the compressor, parameters of the gas being processed and operating parameters of the system 1 , which are detected by the transducers functionally coupled to the control unit 23. Based upon the detected values of suction pressure (Ps), suction temperature (Ts), angular speed (N), mean molar mass (Mw) and compressibility (Zs), the control unit 33 calculates the current suction limit line SLL, based on store data, e.g. in table form, and/or by interpolation. The data for the calculation of the SLL can be stored in the storage memoiy resources 25.
  • the corrected power Wcorr is calculated with formula (1).
  • the distance between the actual operating point and the calculated SLL is then determined.
  • an anti-surge control routine is started, if needed, to control the opening of the anti-surge valve.
  • the anti-surge valve can be controlled according to current art methods. In general, if the distance is less than a safety value, the anti-surge val ve 13 is opened. If the distance is equal to or greater than a safety value, the anti-surge valve 13 is maintained in the closed condition.
  • the control method described so far is summarized in the flow chart of Fig. .
  • the last block of the flow chart represents an anti-surge valve control.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Control Of Positive-Displacement Air Blowers (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
PCT/EP2017/066909 2016-07-07 2017-07-06 Compressor anti-surge protection under wet gas conditions WO2018007509A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US16/315,529 US20190301478A1 (en) 2016-07-07 2017-07-06 Compressor anti-surge protectoin under wet gas conditions
KR1020197002760A KR102371876B1 (ko) 2016-07-07 2017-07-06 습윤 가스 조건 하에서의 압축기 서지 방지 보호
EP17734763.0A EP3482081B1 (de) 2016-07-07 2017-07-06 Pumpschutz für verdichter unter feuchten gasbedingungen
JP2018567687A JP6979977B2 (ja) 2016-07-07 2017-07-06 湿潤ガス条件下での圧縮機のサージ防止保護
DK17734763.0T DK3482081T3 (da) 2016-07-07 2017-07-06 Beskyttelse mod trykstød i kompressor under vådgasforhold

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102016000070852A IT201600070852A1 (it) 2016-07-07 2016-07-07 Protezione anti-pompaggio di compressore in condizioni di gas umido
IT102016000070852 2016-07-07

Publications (1)

Publication Number Publication Date
WO2018007509A1 true WO2018007509A1 (en) 2018-01-11

Family

ID=57610024

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/066909 WO2018007509A1 (en) 2016-07-07 2017-07-06 Compressor anti-surge protection under wet gas conditions

Country Status (7)

Country Link
US (1) US20190301478A1 (de)
EP (1) EP3482081B1 (de)
JP (1) JP6979977B2 (de)
KR (1) KR102371876B1 (de)
DK (1) DK3482081T3 (de)
IT (1) IT201600070852A1 (de)
WO (1) WO2018007509A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180163736A1 (en) * 2016-12-09 2018-06-14 General Electric Company Systems and methods for operating a compression system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201600070842A1 (it) * 2016-07-07 2018-01-07 Nuovo Pignone Tecnologie Srl Metodo e sistema di controllo anti-pompaggio adattivo
CN114725445B (zh) * 2022-03-25 2023-01-03 湖南大学 一种燃料电池空压机流量控制方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0676545A2 (de) * 1994-04-07 1995-10-11 Compressor Controls Corporation Verfahren und Gerät zur Regulierung des Pumpens
EP1031803A2 (de) * 1999-02-26 2000-08-30 Compressor Controls Corporation Verfahren und Vorrichtung zur Maximierung der Produktivität einer Erdgasverflüssigungsanlage
WO2012007553A1 (en) * 2010-07-14 2012-01-19 Statoil Asa A method and apparatus for composition based compressor control and performance monitoring
US20160177958A1 (en) * 2014-12-18 2016-06-23 Sulzer Management Ag Operating method for a pump, in particular for a multiphase pump, and pump

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5908462A (en) * 1996-12-06 1999-06-01 Compressor Controls Corporation Method and apparatus for antisurge control of turbocompressors having surge limit lines with small slopes
US6364602B1 (en) * 2000-01-06 2002-04-02 General Electric Company Method of air-flow measurement and active operating limit line management for compressor surge avoidance
EP2325494B1 (de) * 2009-11-19 2017-04-12 General Electric Company Auf Drehmoment basierender Sensor und Steuerverfahren zur Veränderung von Gas-Flüssigkeits-Fraktionen von Fluiden für Turbomaschinen
US9133850B2 (en) * 2011-01-13 2015-09-15 Energy Control Technologies, Inc. Method for preventing surge in a dynamic compressor using adaptive preventer control system and adaptive safety margin
NO337108B1 (no) * 2012-08-14 2016-01-25 Aker Subsea As Flerfase trykkforsterkningspumpe
ITFI20130064A1 (it) * 2013-03-26 2014-09-27 Nuovo Pignone Srl "methods and systems for controlling turbocompressors"

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0676545A2 (de) * 1994-04-07 1995-10-11 Compressor Controls Corporation Verfahren und Gerät zur Regulierung des Pumpens
EP1031803A2 (de) * 1999-02-26 2000-08-30 Compressor Controls Corporation Verfahren und Vorrichtung zur Maximierung der Produktivität einer Erdgasverflüssigungsanlage
WO2012007553A1 (en) * 2010-07-14 2012-01-19 Statoil Asa A method and apparatus for composition based compressor control and performance monitoring
US20160177958A1 (en) * 2014-12-18 2016-06-23 Sulzer Management Ag Operating method for a pump, in particular for a multiphase pump, and pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180163736A1 (en) * 2016-12-09 2018-06-14 General Electric Company Systems and methods for operating a compression system

Also Published As

Publication number Publication date
EP3482081A1 (de) 2019-05-15
JP2020500270A (ja) 2020-01-09
KR20190022818A (ko) 2019-03-06
DK3482081T3 (da) 2024-01-29
JP6979977B2 (ja) 2021-12-15
IT201600070852A1 (it) 2018-01-07
EP3482081B1 (de) 2023-11-22
US20190301478A1 (en) 2019-10-03
KR102371876B1 (ko) 2022-03-08

Similar Documents

Publication Publication Date Title
AU2014243207B2 (en) Methods and systems for controlling turbocompressors
CN101749130B (zh) 用于诊断增压装置的循环空气滑阀的方法和装置
WO2018007509A1 (en) Compressor anti-surge protection under wet gas conditions
US7824148B2 (en) Centrifugal compressor performance by optimizing diffuser surge control and flow control device settings
JP6046885B2 (ja) 混成流段を備えたターボ機械及びその方法
US10989211B2 (en) Methods and systems for antisurge control of turbo compressors with side stream
EP2400117A1 (de) Turboexpander und Verfahren zur Verwendung verstellbarer Eintrittsleitschaufeln an einem Kompressoreintritt
FR3014839A1 (de)
NO338575B1 (no) System for pumping av et fluid og fremgangsmåte for dens drift.
CN105257580A (zh) 用于反应气压缩机的控制系统及方法
EP3482082B1 (de) Adaptives system zur pumpregelung und verfahren
WO2016059810A1 (ja) サージ判定装置、サージ判定方法およびプログラム
EP3409919B1 (de) Steuervorrichtung für ein motorsystem mit turbolader und elektrisch angetriebenem kompressor
RU2762473C2 (ru) Способ регулирования многоступенчатого компрессора
JPS62195492A (ja) タ−ボ圧縮機のサ−ジング防止装置
Ahonen et al. Remote monitoring of fluid handling systems with variable-speed drive
Bakken et al. Wet gas compressor operation and performance
Bakken et al. An Experimental Investigation on the Impact of Inlet Slugging on Wet Gas Compressor Performance
Perez Remember to Check the Rotational Speed When Encountering Process Machinery Flow Problems
RU2434162C9 (ru) Способ защиты компрессора от помпажа
WO2016206761A1 (en) Determining the phase composition of a fluid flow
JP6468011B2 (ja) 電子制御装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17734763

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2018567687

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 20197002760

Country of ref document: KR

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 2017734763

Country of ref document: EP

Effective date: 20190207