EP0865602B1 - 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
- EP0865602B1 EP0865602B1 EP96943099A EP96943099A EP0865602B1 EP 0865602 B1 EP0865602 B1 EP 0865602B1 EP 96943099 A EP96943099 A EP 96943099A EP 96943099 A EP96943099 A EP 96943099A EP 0865602 B1 EP0865602 B1 EP 0865602B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- liquid
- components
- flows
- flow
- liquid flows
- 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 a process for reliable function of Heat exchangers.
- the object of the invention is to interpret Dimensioning and operation of the components of the heat exchanger through which liquid flows to coordinate so that a fully automatic Venting of the liquid-carrying components takes place and so that a reliable function is guaranteed. Furthermore, the manufacturing, assembly, Commissioning and operating effort can be reduced.
- Embodiments of the invention are as follows described in more detail.
- the device for the reliable function of Heat exchangers have several parallel ones Liquid-flow components for heat transfer between liquid and liquid / gaseous media.
- the Flow differential pressure if the process-related liquid mass flow by a factor preferably selected ⁇ 1.0 larger than the sum of static pressures from the through the height jumps emerging gas / liquid columns of each Flow path.
- the designed for heat transfer Flow channels are dimensioned at the same time and trained that for each component through which liquid flows necessary Flow differential pressure builds up.
- the necessary differential flow pressure can also be determined by a temporarily increased liquid mass flows be so that any accumulated gas cushion be driven out.
- plant components are like e.g. Pumps, bypass circuits and controls appropriately dimensioned and designed.
- the factor ⁇ 1.0 is determined by fluidic measurements for the components through which liquid flows Inclusion of any additional influencing factors such as e.g. Surface toughness, viscosity etc. determined.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Making Paper Articles (AREA)
- Other Air-Conditioning Systems (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur betriebssicheren Funktion von Wärmetauschern.The invention relates a process for reliable function of Heat exchangers.
Zur Entlüftung der flüssigkeitsdurchströmten Bauteile und damit zur betriebssicheren Funktion von Hochleistungs-Wärmeaustauschern, speziell bei Gegenströmern, werden bisher Kreuzstromverschaltungen - als entlüftbare Fluidwege ausgeführt - verwendet oder es werden nach Patent DE 33 25 230 separate Absperrorgane installiert.For venting the components through which liquid flows and thus for the reliable function of High performance heat exchangers, especially at Counter-currents, cross-flow interconnections have so far - executed as ventable fluid paths - used or it are according to patent DE 33 25 230 separate shut-off devices Installed.
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 ist. All known constructions in which the Bleed fluid paths automatically and thus reliably have the disadvantage that only countercurrent guides are conditionally reachable and therefore, despite the same Area, only a lower heat recovery rate can be 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 designs according to patent DE 33 25 230 and also EP 0177751 have the disadvantage that separate Shut-off devices are provided for the necessary ventilation must be what an increased manufacturing, Assembly, commissioning and operating expenses required.
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 interpret Dimensioning and operation of the components of the heat exchanger through which liquid flows to coordinate so that a fully automatic Venting of the liquid-carrying components takes place and so that a reliable function is guaranteed. Furthermore, the manufacturing, assembly, Commissioning and operating effort can 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 solved.
Damit ist eine vollautomatische Entlüftung bei hoher Betriebssicherheit gewährleistet. Der Aufwand für Herstellung, Montage, Betrieb und Bedienung ist besonders gering.This is a fully automatic ventilation at high Operational safety guaranteed. The effort for Manufacturing, assembly, operation and operation is particularly low.
Vorteilhafte Ausgestaltungen sind in den Unteransprüchen aufgeführt.Advantageous embodiments are in the subclaims listed.
Ausführungsbeispiele der Erfindung werden im folgenden näher beschrieben.Embodiments of the invention are as follows described in more detail.
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.To e.g. a heat exchanger according to patent DE 33 25 230 with 30 rows of pipes and accordingly 30 Height jumps of 30 mm each reliably operate, the inner diameter and length the components through which liquid flows, here the pipes, be designed so that the flow pressure loss is greater than 30 height differences x 30 mmWS accordingly 900 mmWS is.
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.Through fluidic measurements is a specific one Factor of the components through which the liquid flows determine which air cushions are not solely due to the loss of flow pressure reduce, be driven out.
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 Kreislaufsystems werden mit einer Bypassschaltung kurzgeschlossen, so daß die Pumpenleistung nur auf den zu entlüftenden Wärmeaustauscher wirkt. Vorteilhafterweise enthält die Zentrale Leittechnik/Gebäudeleittechnik einen Steuerungs-Programmteil, welches intermittierend diese Fluidströmung einschaltet.If this is due to the pipe inside diameter being too large, this 900 mmWS cannot be reached, e.g. the liquid Mass flow can be increased temporarily, so that by a higher flow rate higher Differential flow pressures arise. To do this, the Be designed accordingly or with a The pump motor turns on for a short time driven higher performance. Or parts of the Circulatory system are with a bypass circuit short-circuited, so that the pump output only to the venting heat exchanger works. Advantageously contains the central control system / building management system a control program part which is intermittent this fluid flow turns on.
Die Vorrichtung zur betriebssicheren Funktion von Wärmeaustauschern weist mehrere parallele flüssigkeitsdurchströmte Bauteile zur Wärmeübertragung zwischen flüssigen und flüssig/gasförmigen Medien auf. Zur vollautomatischen Entlüftung der flüssigkeitsdurchströmten Bauteile mit Höhenversprüngen, insbesondere bei gegenstrombedingter hydraulischer Verschaltung, wird der Strömungsdifferenzdruck bei Einhaltung des prozeßbedingten flüssigen Massenstromes um einen Faktor vorzugsweise ≥ 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 the reliable function of Heat exchangers have several parallel ones Liquid-flow components for heat transfer between liquid and liquid / gaseous media. For fully automatic ventilation of the components with fluid flow Height jumps, especially in the case of countercurrent hydraulic circuit, the Flow differential pressure if the process-related liquid mass flow by a factor preferably selected ≥ 1.0 larger than the sum of static pressures from the through the height jumps emerging gas / liquid columns of each Flow path. The designed for heat transfer Flow channels are dimensioned at the same time and trained that for each component through which liquid flows necessary Flow differential pressure builds up.
Der notwendige Strömungsdifferenzdruck kann auch durch ein zeitweises Erhöhen der flüssigen Massenströme erreicht werden, so daß etwaig angesammelte Gaspolster ausgetrieben werden. Hierbei sind Anlagenbauteile wie z.B. Pumpen, Bypassschaltungen und Steuerungen entsprechend dimensioniert und ausgelegt.The necessary differential flow pressure can also be determined by a temporarily increased liquid mass flows be so that any accumulated gas cushion be driven out. Here plant components are like e.g. Pumps, bypass circuits and controls appropriately dimensioned and designed.
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 components through which liquid flows Inclusion of any additional influencing factors such as e.g. 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 preferably >= 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 true EP0865602B1 (en) | 2001-11-28 |
| EP0865602B2 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) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19808753C1 (en) * | 1998-03-02 | 1999-09-02 | Howatherm Klimatech Gmbh | Heat exchanger for air conditioning |
| DE202019103830U1 (en) | 2019-07-11 | 2019-11-13 | Seifert Systems Ltd. | Arrangement for operating several air-liquid heat exchanger units connected in parallel |
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 BR BR9611938-1A patent/BR9611938A/en not_active Application Discontinuation
- 1996-12-12 EP EP96943099A patent/EP0865602B2/en not_active Expired - Lifetime
- 1996-12-12 AT AT96943099T patent/ATE209771T1/en active
- 1996-12-12 AU AU11936/97A patent/AU1193697A/en not_active Abandoned
- 1996-12-12 CA CA002240134A patent/CA2240134A1/en not_active Abandoned
- 1996-12-12 JP JP9521743A patent/JP2000502173A/en active Pending
- 1996-12-12 DE DE59608330T patent/DE59608330D1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| ATE209771T1 (en) | 2001-12-15 |
| EP0865602B2 (en) | 2006-12-27 |
| BR9611938A (en) | 1999-12-28 |
| EP0865602A1 (en) | 1998-09-23 |
| AU1193697A (en) | 1997-07-03 |
| DE59608330D1 (en) | 2002-01-10 |
| JP2000502173A (en) | 2000-02-22 |
| DE19546276A1 (en) | 1997-06-19 |
| CA2240134A1 (en) | 1997-06-19 |
| WO1997021972A1 (en) | 1997-06-19 |
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