EP0865602B2 - Process for venting heat exchangers in a fully automatic manner - Google Patents
Process for venting heat exchangers in a fully automatic manner Download PDFInfo
- Publication number
- EP0865602B2 EP0865602B2 EP96943099A EP96943099A EP0865602B2 EP 0865602 B2 EP0865602 B2 EP 0865602B2 EP 96943099 A EP96943099 A EP 96943099A EP 96943099 A EP96943099 A EP 96943099A EP 0865602 B2 EP0865602 B2 EP 0865602B2
- Authority
- EP
- European Patent Office
- Prior art keywords
- liquid
- components
- flow
- flows
- heat exchangers
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
- F28F2265/18—Safety or protection arrangements; Arrangements for preventing malfunction for removing contaminants, e.g. for degassing
Definitions
- the invention relates to a method for the reliable operation of heat exchangers.
Abstract
Description
Die Erfindung betrifft ein Verfahren zur betriebssicheren Funktion von Wärmetauschem.The invention relates to a method for the reliable operation of heat exchangers.
Zur Entlüftung der flüssigkeitsdurchströmten Bauteile und damit zur betriebssicheren Funktion von Hochleistungs-Wärmeaustauschem, speziell bei Gegenströmern, werden bisher Kreuzstromverschaltungen - als entlüftbare Fluidwege ausgeführt - verwendet oder es werden nach Patent DE 33 25 230 separate Absperrorgane installiert.For bleeding the liquid-flow components and thus the reliable operation of high-performance heat exchangers, especially counterflow, so far cross-flow interconnections - designed as ventable fluid paths - used or there are installed according to patent DE 33 25 230 separate shut-off devices.
Alle bekannten Konstruktionen, bei welchen sich die Fluidwege automatisch und damit betriebssicher entlüften, haben den Nachteil, daß reine Gegenstromführungen nur bedingt erreichbar sind und dadurch, trotz gleicher Fläche, nur eine geringere Rückwärmzahl erzielbar istAll known constructions in which vent the fluid paths automatically and thus reliable, have the disadvantage that pure counterflow guides are only partially achievable and thereby, despite the same area, only a lower heat recovery is achieved
Die Ausführungen gemäß Patent DE 33 25 230 und auch EP 0177751 haben den Nachteil, daß separate Absperrorgane zum ggf. notwendigen Entlüften vorgesehen werden müssen, was einen erhöhten Herstellungs-, Montage-, Inbetriebnahme- und Bedienungsaufwand erfordert.The embodiments according to patent DE 33 25 230 and also EP 0177751 have the disadvantage that separate shut-off valves must be provided for possibly necessary venting, which requires increased manufacturing, assembly, commissioning and operating expenses.
Die Aufgabe der Erfindung besteht darin, die Auslegung, Dimensionierung und Betriebsweise der flüssigkeitsdurchströmten Bauteile des Wärmeaustauschers so aufeinander abzustimmen, daß eine vollautomatische Entlüftung der flüssiggeführten Bauteile erfolgt und damit eine betriebssichere Funktion gewährleistet ist. Desweiteren soll der Herstellungs-, Montage-, Inbetriebnahme- und Bedienungsaufwand reduziert werden.The object of the invention is to match the design, dimensioning and operation of the liquid-flow components of the heat exchanger to one another so that a fully automatic ventilation of the liquid-guided components takes place and thus a reliable operation is guaranteed. Furthermore, the manufacturing, assembly, commissioning and operating effort to be reduced.
Diese Aufgabe wird erfindungsgemäß durch den kennzeichnenden Teil des Anspruchs 1 gelöst.This object is achieved by the characterizing part of claim 1.
Damit ist eine vollautomatische Entlüftung bei hoher Betriebssicherheit gewährleistet. Der Aufwand für Herstellung, Montage, Betrieb und Bedienung ist besonders gering.This ensures fully automatic ventilation with high operational reliability. The cost of manufacture, assembly, operation and operation is particularly low.
Vorteilhafte Ausgestattungen sind in den Unteransprüchen aufgeführt.Advantageous Ausgestattungen are listed in the dependent claims.
Ausführungsbeispiele der Erfindung werden im folgenden näher beschrieben.Embodiments of the invention will be described in more detail below.
Um z.B. einen Wärmeaustauscher nach Patent DE 33 25 230 mit 30 Rohrreihen und dementsprechend 30 Höhenversprüngen von jeweils 30 mm betriebssicher zu betreiben, müssen der innere Durchmesser und die Länge der flüssigkeitsdurchströmten Bauteile, hier die Rohre, derart ausgelegt werden, daß der Strömungsdruckverlust größer ist als 30 Höhenversprünge x 30 mmWS entsprechend 900 mmWS ist.For example, To operate a heat exchanger according to patent DE 33 25 230 with 30 rows of tubes and accordingly 30 height jumps of 30 mm reliably, the inner diameter and the length of the liquid-flow components, here the tubes must be designed so that the flow pressure loss is greater than 30 height jumps x 30 mmWS is equivalent to 900 mmWS.
Durch strömungstechnische Messungen ist ein spezifischer Faktor der flüssigkeitsdurchströmten Bauteile zu ermitteln, bei welchem etwaige Luftpolster, die nicht allein aufgrund des Strömungsdruckverlustes sich verringern, ausgetrieben werden.By fluidic measurements, a specific factor of the liquid-flow components is to be determined, in which any air cushion, which does not reduce solely due to the flow pressure loss, be expelled.
Falls aufgrund zu großer Rohrinnendurchmesser diese 900 mmWS nicht erreicht werden, kann z.B. der flüssige Massenstrom zeitweise erhöht werden, so daß durch eine höhere Fließgeschwindigkeit höhere Strömungsdifferenzdrücke entstehen. Dazu muß ggf. die Pumpe entsprechend ausgelegt sein oder mit einem Frequenzumformer wird der Pumpenmotor kurzzeitig auf höhere Leistung gefahren. Oder Teilbereiche des Krelslaufsystems werden mit einer Bypassschaltung kurzgeschlossen, so daß die Pumpenleistung nur auf den zu entlüftenden Wärmeaustauscher wirkt. Vorteilhafterweise enthält die Zentrale Leittechnik/Gebäudelektechnik einen Steuerungs-Programmteil, welches Intermittierend diese Fluidströmung einschaltet.If these 900 mmWS are not achieved due to the large pipe inside diameter, e.g. the liquid mass flow are temporarily increased, so that higher flow differential pressures occur due to a higher flow rate. For this purpose, if necessary, the pump must be designed accordingly or with a frequency converter, the pump motor is driven briefly to higher power. Or parts of the Krelslaufsystems be shorted with a bypass circuit, so that the pump power acts only on the heat exchanger to be vented. Advantageously, the central control system / building technology contains a control program part, which intermittently turns on this fluid flow.
Die Vorrichtung zur betriebssicheren Funktion von Wärmeaustauschem weist mehrere parallele flüssigkeitsdurchströmte Bauteile zur Wärmeübertragung zwischen flüssigen und flüssig/gasförmigen Medien auf. Zur vollautomatischen Entlüftung der flüssigkeits durchströmten Bauteile mit Höhenversprüngen, insbesondere bei gegenstrombedingter hydraulischer Verschaltung, wird der Strömungsdifferenzdruck bei Einhaltung des prozeßbedingten flüssigen Massenstromes um einen Faktor > 1.0 größer gewählt als die Summe der statischen Drücke aus den durch die Höhenversprünge entstehenden Gas-/Flüssigkeitssäulen eines jeden Strömungsweges. Die zur Wärmeübertragung konstruierten Strömungskanäle sind gleichzeitig derart dimensioniert und ausgebildet, daß sich der für jedes flüssigkeitsdurchströmte Bauteil notwendige o.g. Strömungsdifferenzdruck aufbaut.The device for reliable operation of Wärmeaustauschem has a plurality of parallel liquid-flow components for heat transfer between liquid and liquid / gaseous media. For fully automatic venting of fluid-flow components with height differences, especially in countercurrent hydraulic interconnection, the flow differential pressure is adhered to the process-related liquid mass flow by a factor> 1.0 greater than the sum of the static pressures resulting from the height jumps gas / liquid columns of each flow path. The flow channels designed for heat transfer are simultaneously dimensioned and designed such that the o.g. Builds up flow differential pressure.
Der notwendige Strömungsdifferenzdruck kann auch durch ein zeitweises Erhöhen der flüssigen Massenströme erreicht werden, so daß etwaig angesammeite Gaspolster ausgetrieben werden. Hierbei sind Anlagenbauteile wie z.B. Pumpen, Bypassschaltungen und Steuerungen entsprechend dimensioniert und ausgelegt.The necessary flow differential pressure can also be achieved by a temporary increase in the liquid mass flows, so that any accumulated gas cushion are expelled. Here are plant components such. Pumps, bypass circuits and controls are dimensioned and dimensioned accordingly.
Der Faktor > 1.0 wird durch strömungstechnische Messungen für die flüssigkeitsdurchströmten Bauteile unter Einbeziehung aller ggf. zusätzlichen Einflußgrößen wie z.B. Oberflächenzähigkeit, Viskosität etc. ermittelt.The factor> 1.0 is determined by fluidic measurements for the liquid-flow components, taking into account any additional influencing variables, such as Surface toughness, viscosity, etc. determined.
Claims (3)
- A method for the reliable operation of heat exchangers having a number of parallel components vertically differring in level through which liquid flows, in particular having hydraulic counterflow circuits for heat transfer between liquid and liquid/gaseous media, characterised in that the components through which liquid flows are automatically vented by the feature that, while maintaining the liquid mass flow conditioned by the process and in combination with internal diameter, the length of the components through which liquid flows and the fluid properties the resulting differential flow pressure in each component is adjusted by a factor > 1.0 greater than the sum of the static pressures from the gas/liquid columns of each flow path produced by the varying vertical heights.
- A method according to claim 1, characterised in that the differential flow pressure is obtained by temporarily increasing the liquid mass flow, while at the same time the installation components such as pumps, bypass connections, air separators and and controls systems are correspondingly dimensioned and designed.
- A method according to one of the claims 1 or 2, characterised in that the factor > 1.0, is determined by technical hydraulic measurements for the components through which liquid flows, including all possible additional influencing values, such as surface roughness and/or viscosity.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19546276 | 1995-12-12 | ||
| DE19546276A DE19546276A1 (en) | 1995-12-12 | 1995-12-12 | Method and device for the reliable operation of heat exchangers with several parallel liquid-flow components for heat transfer between liquid and liquid / gaseous media |
| PCT/EP1996/005565 WO1997021972A1 (en) | 1995-12-12 | 1996-12-12 | Process and device for venting heat exchangers in a fully automatic manner |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0865602A1 EP0865602A1 (en) | 1998-09-23 |
| EP0865602B1 EP0865602B1 (en) | 2001-11-28 |
| EP0865602B2 true EP0865602B2 (en) | 2006-12-27 |
Family
ID=7779853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96943099A Expired - Lifetime EP0865602B2 (en) | 1995-12-12 | 1996-12-12 | Process for venting heat exchangers in a fully automatic manner |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0865602B2 (en) |
| JP (1) | JP2000502173A (en) |
| AT (1) | ATE209771T1 (en) |
| AU (1) | AU1193697A (en) |
| BR (1) | BR9611938A (en) |
| CA (1) | CA2240134A1 (en) |
| DE (2) | DE19546276A1 (en) |
| WO (1) | WO1997021972A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202019103830U1 (en) | 2019-07-11 | 2019-11-13 | Seifert Systems Ltd. | Arrangement for operating several air-liquid heat exchanger units connected in parallel |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19808753C1 (en) * | 1998-03-02 | 1999-09-02 | Howatherm Klimatech Gmbh | Heat exchanger for air conditioning |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2790606A (en) * | 1953-09-04 | 1957-04-30 | Warren Webster & Co | Method for expelling air from a closed hot water system |
| DE1776252C2 (en) * | 1967-08-18 | 1978-03-23 | Helmut Baelz Gmbh, 7100 Heilbronn | Process for degassing a heat exchanger heated by steam and regulated by influencing the condensate level |
| DE1601197C3 (en) * | 1967-10-09 | 1979-06-13 | Gea-Luftkuehlergesellschaft Happel Gmbh & Co Kg, 4630 Bochum | Steam pressurized heat exchanger |
| DE2656698A1 (en) * | 1976-12-15 | 1978-06-22 | Gea Luftkuehler Happel Gmbh | Heat exchanger for liquids with solid particles - prevents precipitation in ribbed air cooled tubes forming crossed counterflow path |
| DE3320632A1 (en) * | 1983-06-08 | 1984-12-13 | Hoechst Ag, 6230 Frankfurt | HEAT EXCHANGER |
| DE3325230C2 (en) * | 1983-07-13 | 1994-03-31 | Schilling Heinz Kg | Water / brine-air heat exchanger |
| DE3433598A1 (en) * | 1984-09-13 | 1986-03-20 | Heinz Schilling KG, 4152 Kempen | METHOD FOR PRACTICAL USE OF THE COUNTERFLOW PRINCIPLE FOR HEAT EXCHANGER, AIR / WATER, AIR / AIR OR SENSUAL MEASUREMENT FOR OTHER MEDIA |
| GB2175685B (en) * | 1985-05-30 | 1989-07-05 | Aisin Seiki | Heat exchange arrangements. |
| US4753285A (en) * | 1987-04-06 | 1988-06-28 | Command-Aire Corporation | Parallel piping installation with air by-pass apparatus |
-
1995
- 1995-12-12 DE DE19546276A patent/DE19546276A1/en not_active Ceased
-
1996
- 1996-12-12 WO PCT/EP1996/005565 patent/WO1997021972A1/en active IP Right Grant
- 1996-12-12 AT AT96943099T patent/ATE209771T1/en active
- 1996-12-12 JP JP9521743A patent/JP2000502173A/en active Pending
- 1996-12-12 BR BR9611938-1A patent/BR9611938A/en not_active Application Discontinuation
- 1996-12-12 AU AU11936/97A patent/AU1193697A/en not_active Abandoned
- 1996-12-12 EP EP96943099A patent/EP0865602B2/en not_active Expired - Lifetime
- 1996-12-12 DE DE59608330T patent/DE59608330D1/en not_active Expired - Lifetime
- 1996-12-12 CA CA002240134A patent/CA2240134A1/en not_active Abandoned
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202019103830U1 (en) | 2019-07-11 | 2019-11-13 | Seifert Systems Ltd. | Arrangement for operating several air-liquid heat exchanger units connected in parallel |
| WO2021004763A1 (en) | 2019-07-11 | 2021-01-14 | Seifert Systems Ltd. | Arrangement for operating a plurality of air-liquid heat exchanger units connected in parallel |
| DE102019124291B4 (en) | 2019-07-11 | 2022-03-31 | Seifert Systems Ltd. | Arrangement for operating a plurality of air-liquid heat exchanger units connected in parallel |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE209771T1 (en) | 2001-12-15 |
| BR9611938A (en) | 1999-12-28 |
| EP0865602B1 (en) | 2001-11-28 |
| DE19546276A1 (en) | 1997-06-19 |
| CA2240134A1 (en) | 1997-06-19 |
| AU1193697A (en) | 1997-07-03 |
| EP0865602A1 (en) | 1998-09-23 |
| JP2000502173A (en) | 2000-02-22 |
| DE59608330D1 (en) | 2002-01-10 |
| WO1997021972A1 (en) | 1997-06-19 |
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