EP0898112B1 - Rohrleitungssystem zur gesteuerten Verteilung eines strömenden Mediums sowie Verfahren zum Betrieb eines solchen Rohrleitungssystems - Google Patents
Rohrleitungssystem zur gesteuerten Verteilung eines strömenden Mediums sowie Verfahren zum Betrieb eines solchen Rohrleitungssystems Download PDFInfo
- Publication number
- EP0898112B1 EP0898112B1 EP97810570A EP97810570A EP0898112B1 EP 0898112 B1 EP0898112 B1 EP 0898112B1 EP 97810570 A EP97810570 A EP 97810570A EP 97810570 A EP97810570 A EP 97810570A EP 0898112 B1 EP0898112 B1 EP 0898112B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- pressure measuring
- branch lines
- measuring device
- measuring devices
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 7
- 239000012530 fluid Substances 0.000 title 1
- 238000009530 blood pressure measurement Methods 0.000 claims description 24
- 238000005259 measurement Methods 0.000 description 37
- 239000011159 matrix material Substances 0.000 description 7
- 238000009795 derivation Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 241001136792 Alle Species 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- -1 steam Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/18—Arrangements for supervising or controlling working operations for measuring the quantity of conveyed product
Definitions
- the present invention relates to a piping system for Distribution of a flowing medium, comprising a main line, which at a branch point into a plurality branched from branch lines in each of the branch lines a variable throttle, with which the mass flow is adjustable in each of the branch lines, as well as for each Throttle point a first pressure measuring device with which the pressure drop of the flowing medium at the respective Throttle point is measured.
- the invention further relates to a method for operation of such a piping system.
- a compressible or incompressible Medium e.g. cooling water, steam, oil or the like
- the supply system used for this typically exists from a network of pipelines, which itself characterized by branching points (nodes) at which a main line (a main flow of the medium) into two or more branch lines (branch streams) which branch to individual consumers or groups of consumers.
- branching points nodes
- branch streams branch lines
- a control valve is arranged in the branch line whose stroke is set so that the desired one Mass flow flows through the valve.
- a piping system as it is in Fig. 1 is shown.
- a main line 11 branches at a branch point 12 in (for example) three branch lines 13, 14 and 15.
- a valve V1 or V2 or V3 provided, by means of which the mass flow can be set (controlled) by the respective branch line can.
- h h (K V ).
- K V ⁇ (dm / dt) [T M / (P M - ⁇ p)] 1 ⁇ 2 [1 / Ap] 1 ⁇ 2 .
- ⁇ the mass flow dm / dt
- the pressure p M the temperature T M at the branch point 12 or in the main line 11, and the pressure drop ⁇ p at the valve.
- the quantity K V can be determined on the basis of the measured quantities T M , p M and ⁇ p according to equation (2).
- the valve lift can be calculated from the specified valve characteristic K V (h). A comparable determination can also be carried out for incompressible media.
- valve stroke The most important variable for the calculation of the valve stroke is the pressure drop measured at valves V1, .., V3. If if this measurement becomes faulty, this leads to an unacceptable one Failure of the supply system (and in the case of one Gas turbine for a quick shutdown) or even (e.g. in Case of a cooling water system) to a security risk. It is therefore desirable in many cases, the measurement of the Pressure drop across valves V1, .., V3 redundant, making an error in a single measurement of the pressure drop ⁇ p not the continuous, safe operation of the system touched or impaired (availability requirement or Availability Requirement AR).
- the purpose of a redundancy concept is twofold: (1) The occurrence of a measurement error should be recognized and the faulty one Measuring device or the faulty measuring channel should be identified. (2) The (not) usable measurement values are to be replaced by redundantly determined measured values.
- Reported errors (Notified Failure NF): This type of error includes all errors that are reported to the control system by the sender or another I / O device using a bad data quality (BDQ) signal. Based on the BDQ signal, the control system knows which ⁇ p measurement is faulty. This typically happens when a measuring line is interrupted or an error occurs in a component in the measuring chain.
- BDQ bad data quality
- the redundant measurement of the pressure drop can be carried out according to FIG. 2 with double redundancy.
- double redundancy is already per valve in addition to that existing pressure measuring device PM1, .., PM3 each one second pressure measuring device PM4, .., PM6 arranged in parallel. If one of the two pressure measurements (per valve) is faulty, can be switched to the other pressure measurement. This is only possible for reported errors where the incorrect measurement can be detected by the BDQ signal can.
- a drift of the measurement can be doubled Redundancy cannot be mastered because only two are independent Measurements per valve cannot be decided which of the two measurements is disturbed (or drifts).
- the redundant measurement can be used to overcome this problem 3 with a triple redundancy be performed.
- pro Valve next to the existing pressure measuring device PM1, .., PM3 each have a second pressure measuring device PM4, .., PM6 and a third pressure measuring device PM7, .., PM9 arranged in parallel.
- the 2-out-of-3 choice principle is used. The 2-out-of-3 choice principle assumes that if 2 out of 3 Measuring channels deliver the same measured values, these measuring channels work correctly while the third measuring channel is faulty is.
- the task is the beginning of a piping system mentioned type in that to achieve redundancy in the pressure measurement at least between two of the branch lines in the direction of flow behind the throttling points second pressure measuring device for measuring the differential pressure is arranged between the respective branch lines.
- second pressure measuring device By adding the second pressure measuring device in the specified Way is used for measuring the pressure drop to the Throttling points of the two affected branch lines one double redundancy achieved.
- the three pressure measuring devices measure the differences between a total of three pressures (the Pressure in the main line and the pressures in the two Branch lines behind the throttling points), each of the three pressures each from two pressure measuring devices as a reference value is taken.
- any pressure reading for a branch line can therefore be divided into two Determine wise (double redundant): First as direct Measured value of the associated first pressure measuring device, and others from the sum of the measured values of the other two pressure measuring devices.
- the invention allows three Pressure measuring devices for two branch lines one double Realize redundancy while using the scheme from Fig. 2 four pressure measuring devices would be necessary.
- the dual redundancy is to be implemented for all branch lines according to a first preferred embodiment the invention between each branch line and each another branch line a second pressure measuring device to measure the differential pressure between the respective Branch lines arranged.
- n branch lines With n branch lines, n-1 Pressure measuring devices required.
- each branch line and two additional branches each have a second one Pressure measuring device for measuring the differential pressure between the respective branch lines is arranged.
- the method according to the invention for operating the pipeline system is characterized in that for each pair of Branch lines the associated first pressure measuring devices and that arranged between the pair of branch lines second pressure measuring device each grouped together be, with the proper functioning of the Pressure measuring devices for each group of pressure measuring devices the sum of the pressure readings is zero, and that if one of the first pressure measuring devices within a group fails, the associated pressure reading from the Pressure measurement values of the other two pressure measuring devices of the Group is determined.
- a preferred embodiment of the method according to the invention is characterized in that every first pressure measuring device each in two groups of pressure measuring devices is represented, and that the pressure readings from the first Pressure measuring device to be treated as faulty if those from the other two pressure gauges each of the the two groups determined associated pressure measurements with each other, but not with those from the first pressure measuring device pressure readings match.
- the pipeline system 10 comprises a main line 11, which is at the branch point 12 in the three branch lines 13, 14 and 15 branches.
- a controllable throttle valve V1, V2 and V3 built-in.
- the pressure drop (pressure loss) at the valves V1, V2, V3 is initially directly through a parallel to the valve arranged first pressure measuring device PM1 or PM2 or PM3 measured. For this - as shown in the figures - on both Sides of the valve from the branch piping to the pressure measuring devices.
- FIG. 4 in the example of FIG. 4 there are three second pressure measuring devices PM10, PM11 and PM12, which are each arranged behind the valves V1, V2 and V3 between the branch lines and the pressure difference between each Measure two of the branch lines 13, 14 and 15.
- the pressure measuring devices PM1, PM2 and PM3 thus measure the pressure drop ⁇ p1, ⁇ p2 and ⁇ p3 at the valves V1, V2 and V2.
- the pressure measuring devices PM10, PM11 and PM12 measure the differential pressures ⁇ p10, ⁇ p11 and ⁇ p12 between the branch line pairs 13/14, 13/15 and 14/15.
- ⁇ pj is the violation of the condition ci by a matrix element "1" is displayed in the jth column and the ith row. Conditions that are not violated are indicated accordingly a matrix element "0" is displayed.
- the Measurement of ⁇ p1 incorrect, the conditions according to the table c1 and c3 violated (matrix elements are "1").
- the Conditions c2 and c4 are not affected by this error (Matrix elements are "0").
- the three branch lines are sufficient 3 additional pressure measuring devices PM10, PM11 and PM12 from to get largely the same redundancy as one 3. Additional branch lines are added, two additional pressure measuring devices per additional branch line needed between the additional Branch line and any two other branch lines arranged become. The maximum savings on pressure measuring devices compared to the arrangement of Fig. 3 results in the case of three branch lines.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Measuring Fluid Pressure (AREA)
- Pipeline Systems (AREA)
- Flow Control (AREA)
Description
Es zeigen
- Fig. 1
- ein Rohrleitungssystem mit drei Zweigleitungen nach dem Stand der Technik mit einer Druckmesseinrichtung pro Drosselstelle (Ventil);
- Fig. 2
- das System aus Fig. 1 mit zwei Druckmesseinrichtungen pro Drosselstelle (Ventil) zum Erreichen einer zweifachen Redundanz;
- Fig. 3
- das System aus Fig. 1 mit drei Druckmesseinrichtungen pro Drosselstelle (Ventil) zum Erreichen einer dreifachen Redundanz; und
- Fig. 4
- ein bevorzugtes Ausführungsbeispiel der Erfindung, welches ein Rohrleitungssystem gemäss Fig. 1 zugrunde legt und im Unterschied zu Fig. 3 die dreifache Redundanz durch (wenige) zusätzliche Druckmesseinrichtungen zwischen den Zweigleitungen erreicht.
Bedingung | Δp1 | Δp2 | Δp3 | Δp10 | Δp11 | Δp12 |
c1 = Δp1 + Δp10 - Δp2 = 0 | 1 | 1 | 0 | 1 | 0 | 0 |
c2 = Δp2 + Δp12 - Δp3 = 0 | 0 | 1 | 1 | 0 | 0 | 1 |
c3 = Δp3 - Δp11 - Δp1 = 0 | 1 | 0 | 1 | 0 | 1 | 0 |
c4 = Δp11 - Δp10 - Δp12 = 0 | 0 | 0 | 0 | 1 | 1 | 1 |
- 10
- Rohrleitungssystem
- 11
- Hauptleitung
- 12
- Verzweigungspunkt
- 13,14,15
- Zweigleitung
- PM1,..,PM12
- Druckmesseinrichtung
- V1,V2,V3
- Ventil
Claims (7)
- Rohrleitungssystem (10) zur gesteuerten Verteilung eines strömenden Mediums, umfassend eine Hauptleitung (11), welche sich an einem Verzweigungspunkt (12) in eine Mehrzahl von Zweigleitungen (13, 14, 15) verzweigt, in jeder der Zweigleitungen eine veränderbare Drosselstelle (V1, V2, V3), mit welcher der Massenstrom in jeder der Zweigleitungen (13, 14, 15) einstellbar ist, sowie zu jeder Drosselstelle (V1, V2, V3) eine erste Druckmesseinrichtung (PM1, PM2, PM3), mit welcher der Druckabfall des strömenden Mediums an der jeweiligen Drosselstelle (V1, V2, V3) gemessen wird, dadurch gekennzeichnet, dass zum Erreichen einer Redundanz in der Druckmessung zumindest zwischen zwei der Zweigleitungen (13, 14 bzw. 13, 15 bzw. 14, 15) in Strömungsrichtung hinter den Drosselstellen (V1, V2 bzw. V1, V3 bzw. V2, V3) eine zweite Druckmesseinrichtung (PM10 bzw. PM11 bzw. PM12) zur Messung des Differenzdruckes zwischen den jeweiligen Zweigleitungen (13, 14 bzw. 13, 15 bzw. 14, 15) angeordnet ist.
- Rohrleitungssystem nach Anspruch 1, dadurch gekennzeichnet, dass zwischen jeder Zweigleitung (13, 14, 15) und je einer anderen Zweigleitung (14 bzw. 13 bzw. 14) eine zweite Druckmesseinrichtung (PM10 bzw. PM12) zur Messung des Differenzdruckes zwischen den jeweiligen Zweigleitungen (13, 14 bzw. 14, 13 bzw. 15, 14) angeordnet ist.
- Rohrleitungssystem nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, dass zwischen jeder Zweigleitung (13, 14, 15) und je zwei weiteren Zweigleitungen (14, 15 bzw. 13, 15 bzw. 13, 14) jeweils eine zweite Druckmesseinrichtung (PM10, PM11 bzw. PM10, PM12 bzw. PM11, PM12) zur Messung des Differenzdruckes zwischen den jeweiligen Zweigleitungen (13, 14, 15) angeordnet ist.
- Rohrleitungssystem nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Drosselstellen als Ventile (V1, V2, V3) ausgebildet sind.
- Rohrleitungssystem nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass drei Zweigleitungen (13, 14, 15) verwendet werden.
- Verfahren zum Betrieb eines Rohrleitungssystems nach Anspruch 1, dadurch gekennzeichnet, dass für jedes Paar von Zweigleitungen (13, 14 bzw. 14, 15 bzw. 13, 15) die zugehörigen ersten Druckmesseinrichtungen (PM1, PM2 bzw. PM2, PM3 bzw. PM1, PM3) und die zwischen dem Paar von Zweigleitungen angeordnete zweite Druckmesseinrichtung (PM10 bzw. PM12 bzw. PM11) jeweils zu einer Gruppe zusammengefasst werden, wobei bei ordnungsgemässer Funktion der Druckmesseinrichtungen für jede Gruppe von Druckmesseinrichtungen die Summe der Druckmesswerte gleich Null ist, und dass, wenn innerhalb einer Gruppe eine der ersten Druckmesseinrichtungen (PM1 oder PM2 bzw. PM2 oder PM3 bzw. PM1 oder PM3) ausfällt, der zugehörige Druckmesswert aus den Druckmesswerten der beiden anderen Druckmesseinrichtungen der Gruppe bestimmt wird.
- Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass jede erste Druckmesseinrichtung (PM1, PM2, PM3) jeweils in zwei Gruppen von Druckmesseinrichtungen vertreten ist, und dass die Druckmesswerte aus der ersten Druckmesseinrichtung als fehlerhaft behandelt werden, wenn die aus den beiden anderen Druckmesseinrichtungen jeder der beiden Gruppen bestimmten zugehörigen Druckmesswerte untereinander, jedoch nicht mit den von der ersten Druckmesseinrichtung abgegebenen Druckmesswerten übereinstimmen.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59710962T DE59710962D1 (de) | 1997-08-15 | 1997-08-15 | Rohrleitungssystem zur gesteuerten Verteilung eines strömenden Mediums sowie Verfahren zum Betrieb eines solchen Rohrleitungssystems |
EP97810570A EP0898112B1 (de) | 1997-08-15 | 1997-08-15 | Rohrleitungssystem zur gesteuerten Verteilung eines strömenden Mediums sowie Verfahren zum Betrieb eines solchen Rohrleitungssystems |
US09/133,668 US6021677A (en) | 1997-08-15 | 1998-08-12 | Pipeline system for the controlled distribution of a flowing medium and method for operating such a pipeline system |
JP10228868A JPH11132400A (ja) | 1997-08-15 | 1998-08-13 | 流動媒体を制御分配するための管路系並びに該管路系の運転法 |
CN98118369A CN1084863C (zh) | 1997-08-15 | 1998-08-17 | 用于控制流动介质分配的管道系统及其操作方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97810570A EP0898112B1 (de) | 1997-08-15 | 1997-08-15 | Rohrleitungssystem zur gesteuerten Verteilung eines strömenden Mediums sowie Verfahren zum Betrieb eines solchen Rohrleitungssystems |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0898112A1 EP0898112A1 (de) | 1999-02-24 |
EP0898112B1 true EP0898112B1 (de) | 2003-11-05 |
Family
ID=8230342
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97810570A Expired - Lifetime EP0898112B1 (de) | 1997-08-15 | 1997-08-15 | Rohrleitungssystem zur gesteuerten Verteilung eines strömenden Mediums sowie Verfahren zum Betrieb eines solchen Rohrleitungssystems |
Country Status (5)
Country | Link |
---|---|
US (1) | US6021677A (de) |
EP (1) | EP0898112B1 (de) |
JP (1) | JPH11132400A (de) |
CN (1) | CN1084863C (de) |
DE (1) | DE59710962D1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10115750B4 (de) * | 2001-03-20 | 2017-05-24 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Steuerung und/oder Diagnose eines einen Massenstrom beeinflussenden Steuersystems |
US6904386B2 (en) * | 2002-10-07 | 2005-06-07 | Honeywell International Inc. | Control system and method for detecting plugging in differential pressure cells |
US6813588B1 (en) * | 2003-03-31 | 2004-11-02 | Honeywell International Inc. | Control system and method for detecting plugging in differential pressure cells |
JP5223555B2 (ja) * | 2008-02-19 | 2013-06-26 | 株式会社デンソー | 燃料噴射装置及び蓄圧式燃料噴射装置システム |
US8024161B2 (en) * | 2008-08-19 | 2011-09-20 | Honeywell International Inc. | Method and system for model-based multivariable balancing for distributed hydronic networks |
KR101534209B1 (ko) * | 2014-04-16 | 2015-07-07 | 한국에너지기술연구원 | 압축성 유체 공급 시스템 |
CN105576268B (zh) * | 2014-10-08 | 2019-02-15 | 通用电气公司 | 用于控制流量比的系统和方法 |
RU2710601C1 (ru) * | 2016-06-20 | 2019-12-30 | Сименс Акциенгезельшафт (Сименс АГ) | Способ измерения расхода жидкости на отдельном участке сети подачи жидкости |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3821897A (en) * | 1972-10-17 | 1974-07-02 | Gen Signal Corp | Pressure sensing probe |
DE3225449C2 (de) * | 1982-07-07 | 1988-09-29 | Klöckner Stahlforschung GmbH, 8458 Sulzbach-Rosenberg | Verfahren und Vorrichtung zum Messen und/oder Regeln des Massestromes von Feststoffteilchen |
US4839571A (en) * | 1987-03-17 | 1989-06-13 | Barber-Greene Company | Safety back-up for metering pump control |
US4900445A (en) * | 1988-06-29 | 1990-02-13 | Conoco Inc. | Low pressure hydrocyclone separator |
DE59301530D1 (de) * | 1992-06-30 | 1996-03-14 | Landis & Gyr Business Support | Verfahren und Vorrichtung zur Begrenzung eines Flusses durch eine Leitung |
US5307668A (en) * | 1992-10-05 | 1994-05-03 | Badger Meter, Inc. | Gas density meter and method |
JP2959947B2 (ja) * | 1994-02-28 | 1999-10-06 | 信越石英株式会社 | 原料ガス供給方法及び装置 |
FR2721999B1 (fr) * | 1994-06-30 | 1996-08-09 | Contruction De Moteurs D Aviat | Debimetre massique redondant |
-
1997
- 1997-08-15 EP EP97810570A patent/EP0898112B1/de not_active Expired - Lifetime
- 1997-08-15 DE DE59710962T patent/DE59710962D1/de not_active Expired - Lifetime
-
1998
- 1998-08-12 US US09/133,668 patent/US6021677A/en not_active Expired - Lifetime
- 1998-08-13 JP JP10228868A patent/JPH11132400A/ja active Pending
- 1998-08-17 CN CN98118369A patent/CN1084863C/zh not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CN1084863C (zh) | 2002-05-15 |
CN1208831A (zh) | 1999-02-24 |
EP0898112A1 (de) | 1999-02-24 |
JPH11132400A (ja) | 1999-05-21 |
DE59710962D1 (de) | 2003-12-11 |
US6021677A (en) | 2000-02-08 |
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