EP2915926A3 - Method for determining the system characteristic curve of a distribution network - Google Patents

Method for determining the system characteristic curve of a distribution network Download PDF

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Publication number
EP2915926A3
EP2915926A3 EP15000332.5A EP15000332A EP2915926A3 EP 2915926 A3 EP2915926 A3 EP 2915926A3 EP 15000332 A EP15000332 A EP 15000332A EP 2915926 A3 EP2915926 A3 EP 2915926A3
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EP
European Patent Office
Prior art keywords
point
ges
resistance
distribution network
pressure
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.)
Withdrawn
Application number
EP15000332.5A
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German (de)
French (fr)
Other versions
EP2915926A2 (en
Inventor
Daniel BÜNING
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.)
Wilo SE
Original Assignee
Wilo SE
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Filing date
Publication date
Application filed by Wilo SE filed Critical Wilo SE
Publication of EP2915926A2 publication Critical patent/EP2915926A2/en
Publication of EP2915926A3 publication Critical patent/EP2915926A3/en
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B5/00—Use of pumping plants or installations; Layouts thereof

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
  • Flow Control (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)

Abstract

Die Erfindung betrifft ein Verfahren zur Bestimmung der Systemkennlinie (5) eines flüssigkeitsführenden Verteilernetzes (2), das mehrere, insbesondere eine Vielzahl Entnahmestellen (8) aufweist, die von einer Pumpenanlage (3) mit wenigstens einer Pumpe (9) mit einem Förderdruck (p) versorgt werden, wobei ein durchflussabhängiger Anteil der Systemkennlinie (5) durch das Produkt (R · Qk ) eines Systemwiderstands (R) und einer Potenz (k) des Durchflusses (Q) beschrieben ist. Im Betrieb der Pumpenanlage (3) werden der Druck (p Ei, p ges) und der Volumenstrom (Q Ei, Q ges) im Verteilernetz (2) jeweils ermittelt, wenn eine erste Entnahmestelle (8, E1), unabhängig davon wenigstens eine zweite Entnahmestelle (8, Ej mit j = 2...n), sowie während die erste und die wenigstens eine zweite Entnahmestelle (8, Ei mit i = 1...n) gleichzeitig geöffnet sind. Der Systemwiderstand (R) wird aus der Verknüpfung zweier Gleichungen berechnet, wobei die erste Gleichung einen Widerstandskoeffizienten (Wges ) einer durch die gleichzeitig geöffnete erste und wenigstens eine zweite Entnahmestelle (8, E i ) gebildeten virtuellen Gesamtentnahmestelle auf der Grundlage einer Druckbilanz beschreibt und die zweite Gleichung den Widerstandskoeffizienten (W ges) dieser virtuellen Gesamtentnahmestelle als Parallelschaltung von Widerstandskoeffizienten (Wi) der ersten und der wenigstens einen zweiten Entnahmestelle (8, Ei) beschreibt, wobei auch die Widerstandskoeffizienten (Wi) der ersten und der wenigstens einen zweiten Entnahmestelle (8, Ei) in der zweiten Gleichung jeweils durch eine Druckbilanz beschrieben sind. Zur Auswertung der jeweiligen Druckbilanz werden der jeweils ermittelte Druck (p Ei, p ges) und der Volumenstrom (Q Ei, Q ges) verwendet.

Figure imgaf001
The invention relates to a method for determining the system characteristic (5) of a liquid-conducting distribution network (2), which has a plurality, in particular a plurality of removal points (8) of a pump system (3) with at least one pump (9) with a delivery pressure ( p ), wherein a flow-dependent portion of the system characteristic (5) by the product ( R · Q k ) of a system resistance (R) and a power (k) of the flow (Q) is described. In operation of the pump system (3), the pressure ( p Ei , p ges ) and the volume flow ( Q Ei , Q ges ) in the distribution network (2) respectively determined when a first sampling point (8, E1), regardless of at least a second Withdrawal point (8, Ej with j = 2 ... n), and while the first and the at least one second sampling point (8, E i with i = 1 ... n) are opened simultaneously. The system resistance (R) is calculated from the combination of two equations, the first equation describing a resistance coefficient ( W tot ) of a total virtual tapping point formed by the simultaneously opened first and at least one second tapping point (8, E i ) on the basis of a pressure balance and the second equation describes the resistance coefficients ( W ges ) of this virtual total removal point as a parallel connection of resistance coefficients ( Wi ) of the first and the at least one second removal point (8, E i ), whereby the resistance coefficients ( Wi ) of the first and the at least one second removal point (8, E i ) in the second equation are each described by a pressure balance. For the evaluation of the respective pressure balance, the respectively determined pressure ( p Ei , p ges ) and the volume flow ( Q Ei, Q ges ) are used.
Figure imgaf001
EP15000332.5A 2014-02-05 2015-02-05 Method for determining the system characteristic curve of a distribution network Withdrawn EP2915926A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014001413.4A DE102014001413A1 (en) 2014-02-05 2014-02-05 Method for determining the system characteristic of a distribution network

Publications (2)

Publication Number Publication Date
EP2915926A2 EP2915926A2 (en) 2015-09-09
EP2915926A3 true EP2915926A3 (en) 2015-10-28

Family

ID=52626943

Family Applications (1)

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EP15000332.5A Withdrawn EP2915926A3 (en) 2014-02-05 2015-02-05 Method for determining the system characteristic curve of a distribution network

Country Status (2)

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EP (1) EP2915926A3 (en)
DE (1) DE102014001413A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106972501B (en) * 2016-01-13 2020-09-15 清华大学 Power distribution network control method
DE102016008016A1 (en) * 2016-07-04 2018-01-04 Wilo Se Method and system for controlling a pump station
SE1651572A1 (en) * 2016-11-30 2018-05-31 RMBLStrip AB Air guiding or deflecting system and method for operating such system
EP3508730B1 (en) * 2018-10-01 2022-05-11 Wilo Se Method for adjusting a pressurisation system
CN115310212B (en) * 2022-10-12 2023-03-24 中汽研（天津）汽车工程研究院有限公司 Method for sampling characteristic data of automobile shock absorber

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4120033A (en) * 1977-01-04 1978-10-10 Corporate Equipment Company Apparatus and method for determining pumping system head curves
WO2012127783A1 (en) * 2011-03-18 2012-09-27 株式会社日立製作所 Water distribution pressure control system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4120033A (en) * 1977-01-04 1978-10-10 Corporate Equipment Company Apparatus and method for determining pumping system head curves
WO2012127783A1 (en) * 2011-03-18 2012-09-27 株式会社日立製作所 Water distribution pressure control system

Also Published As

Publication number Publication date
DE102014001413A1 (en) 2015-08-06
EP2915926A2 (en) 2015-09-09

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