EP1730459A1 - Dispositif de circuit de refroidissement - Google Patents

Dispositif de circuit de refroidissement

Info

Publication number
EP1730459A1
EP1730459A1 EP04718903A EP04718903A EP1730459A1 EP 1730459 A1 EP1730459 A1 EP 1730459A1 EP 04718903 A EP04718903 A EP 04718903A EP 04718903 A EP04718903 A EP 04718903A EP 1730459 A1 EP1730459 A1 EP 1730459A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
line
cooling
consumer
cooling medium
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.)
Granted
Application number
EP04718903A
Other languages
German (de)
English (en)
Other versions
EP1730459B1 (fr
Inventor
Achim Mathar
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.)
Otto Junker GmbH
Original Assignee
Otto Junker GmbH
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 Otto Junker GmbH filed Critical Otto Junker GmbH
Publication of EP1730459A1 publication Critical patent/EP1730459A1/fr
Application granted granted Critical
Publication of EP1730459B1 publication Critical patent/EP1730459B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28B—STEAM OR VAPOUR CONDENSERS
    • F28B9/00—Auxiliary systems, arrangements, or devices
    • F28B9/005—Auxiliary systems, arrangements, or devices for protection against freezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28B—STEAM OR VAPOUR CONDENSERS
    • F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
    • F28B1/06—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using air or other gas as the cooling medium

Definitions

  • the refrigeration cycle device The refrigeration cycle device
  • the invention relates to a cooling circuit device comprising a) a drainable heat exchanger, b) a cooling medium basin, c) an inflow line from the cooling medium basin to the heat exchanger, d) an outflow line from the heat exchanger to the cooling medium basin, e) a pump interposed in the inflow line, for pumping the cooling medium into Towards the heat exchanger.
  • the invention also relates to a cooling method with the cooling circuit device according to the invention, wherein a) in normal operation, the cooling medium coming from the consumer / consumers flows in a main circuit through the heat exchanger, is cooled by it and is fed back to the consumer or the consumers via the cooling medium basin and b) in special operation, the cooling medium contained in the heat exchanger flows out.
  • a cooling circuit device with cross-flow heat exchanger is already known from DE 196 13 910 A1. With the cross-flow heat exchanger presented there, the heat exchanger tubes can be quickly emptied during downtimes and the freezing of the heat exchange liquid prevented and in this way the heat exchanger being prevented from being destroyed.
  • a disadvantage of the known device is that after switching off the cross-flow heat exchanger, there is no further supply of a consumer with cooling water. This is also not necessary with the disclosed cooling circuit device, as long as it is used in areas in which post-cooling can be dispensed with. This is e.g. B. in the plastics industry with cooled injection molding machines.
  • a consumer connected in the inflow line, which is arranged after the pump, g) a short line which opens into the cooling medium basin at its lower end and via a three-way valve at its upper end or two two-way valves is connected to the inflow line between the consumer and the heat exchanger and h) an intermediate line with a shut-off valve which opens into the cooling medium basin with its lower end and with the upper end to the inflow line between the three-way valve and the heat exchanger or between the two two-way valves and the Heat exchanger is connected.
  • the cooling circuit device impresses with its simple construction with only one pump. After switching off the heat exchanger, the consumer can still be cooled with water without the aid of a second pump circuit. Water consumption can be minimized and the use of glycol can be completely dispensed with. Usually, about 35% glycol must be added as an anti-freeze so that anti-freeze can be guaranteed down to minus 20 ° C. A circuit requires approx. 2000 liters of water mixed with glycol. Glycol is too expensive, adversely increases the conductivity of water by around 35 microsiemens and also has to be disposed of in an environmentally friendly manner.
  • the object is achieved in a cooling process of the type mentioned at the outset in that the heat exchanger is removed from the cooling circuit in special operation and the cooling medium only circulates in a makeshift circuit between the cooling medium basin and consumers.
  • a cooling circuit device according to the prior art DE 196 13 910 A1 (there Fig. 2) is presented.
  • the cross-flow heat exchanger 1 is connected to a cold container 3 via a drain line 2. From there, the chilled water flows into one Warm container 4. The heated water is then pumped again via an inflow line 5 to the crossflow heat exchanger 1 with the pump 6. The consumer itself is not shown in the cooling circuit device.
  • the cross-flow heat exchanger 1 is provided with a ventilation device 7. During operation, a small amount of heat exchange fluid constantly emerges from the ventilation nozzle 8. This is collected by the funnel 9 and returned to the cold container 3 via the overflow line 10.
  • This cross-flow heat exchanger 1 which can also be used in the present invention, comprises a frame 12 which is supported on six legs 11 and which carries a housing 13.
  • Fans 14, which are driven by an electric motor, are provided on the upper side of the housing. These ensure that air flows through the cross-flow heat exchanger 1 from bottom to top. The air flowing through is indicated by arrows.
  • the heat exchange liquid (e.g. water) is supplied to the cross-flow heat exchanger 1 via an inflow element 15. This leaves the cross-flow heat exchanger 1 via a drain element 16.
  • the inflow element 15 and drain element 16 each have a collector 17 or 18, in each of which a connection piece 19 or 20 having a connecting flange opens.
  • a heat exchange element 21 is arranged within the housing 13 of the crossflow heat exchanger 1. This comprises a plurality of tubes 22 running parallel to one another and heat exchange fins 23 extending at right angles to them. Half of the tubes 22 are connected to the collector 17 of the inflow element 15, the other half to the collector 18 of the outflow element 16.
  • the heat exchange element 21 is shown in FIG the housing 13 is arranged inclined with respect to the horizontal; thus the tubes 22 also have an identical inclination with respect to the horizontal.
  • a collector 24 is arranged on the side of the cross-flow heat exchanger 1 opposite the inflow element 15 and the outflow element 16. These are velvet tubes 22 connected. In addition, a ventilation nozzle 8 is connected to the collector 24.
  • the heat exchange medium flows via the inflow element 15 into the pipes 22 connected to its collector 17 and exits from the latter at the mouth thereof into the collector 24. From there it enters those tubes 22 which are connected to the collector 18 of the drain element 16.
  • drains 25 arranged on the collectors 17 and 18 of the inflow or outflow element 15, 16 are opened after the circulating pump of the heating or cooling circuit has been put out of operation beforehand. Air flows into the collector 24 through the ventilation connection 8, and the heat exchange liquid flows due to the inclination of all the pipes 12 to both the inflow element 15 and the outflow element 16 and leaves the heat exchange element 21 through the outlets 25.
  • the flow monitor 26 shown in FIG. 1 and the frost protection thermostat 27 can be used to initiate an automatic emptying.
  • FIG 3 shows a cooling circuit device according to the invention with a main and auxiliary circuit.
  • the main circuit comprises a cross-flow heat exchanger 101 arranged at the highest point, similar to that which was explained in FIG. 2.
  • the air flowing through the cross-flow heat exchanger 101 is indicated by arrows.
  • the direction of circulation of the water in the main circuit and in the auxiliary circuit is also indicated by arrows.
  • a cooling medium basin 102 which is filled with water and is connected to the cross-flow heat exchanger 101 via a drain line 103, is arranged lower.
  • This drain line 103 ends below the water level in the cooling medium pool 102. It should end below the water level in order to absorb the oxygen Reduce cooling water to a minimum.
  • a collector 105 is provided on the side of the heat exchanger 101 opposite the inflow line 104 and outflow line 103, to which the heat exchanger tubes 106 and on the other hand a ventilation device 107 are connected.
  • the ventilation device 107 has a ventilation water line 109.
  • the aeration water line 109 connects the aeration device 107 to the cooling medium basin 102.
  • the aeration water line 109 ends above the water level, so that air and no water enter the crossflow heat exchanger 101.
  • a ventilation valve can also be provided.
  • the inflow line 104 has a slight upward or downward slope of at least 2% in the area just before and the outflow line 103 in the area shortly after the heat exchanger 101.
  • the cooling medium basin 102 is connected again to the cross-flow heat exchanger 101 by means of the inflow line 104 and via an intermediate pump 110 and an intermediate consumer 111.
  • the cooling medium basin 102 is preferably made of plastic.
  • the cooling medium basin 102 is provided with a vent fitting 112 with a safety pressure valve and with an overflow 113, which opens briefly when the pressure rises ⁇ 0.1 bar. Water is used as the cooling medium.
  • a furnace system is particularly suitable as a consumer 111.
  • the water heats up at the consumer 111 and is fed through the inflow line 104 to the higher-level crossflow heat exchanger 101 and cools there.
  • the cooled water flows via the drain line 103 to the cooling medium basin 102 and is brought from there back to the consumer 111 by means of the downstream pump 110.
  • the cross-flow heat exchanger 101 In the event that the cross-flow heat exchanger 101 must be switched off, for. B. during maintenance work or risk of frost, the cross-flow heat exchanger 101 is ventilated. A portion of the water in the cross-flow heat exchanger 101 then flows due to gravity through the drain line 103 to the cooling medium basin 102. This also means that part of the water that is in the warehouses connected to the inflow line 104 Metal pipes 106 is located, can flow, an intermediate line 114 is provided with shut-off valve 115, which ends with its lower end in the cooling medium basin 102 below the water level and is connected with the upper end to the inflow line 104 in front of the cross-flow heat exchanger 101. The intermediate line 114 is intended to end with its lower end in the cooling medium basin 102 below the water level in order to minimize the oxygen absorption of the cooling water.
  • the shut-off valve 115 of the intermediate line 114 is closed.
  • the water drainage through the intermediate line 114 to the cooling medium basin 102 is then not possible. Only when the cross-flow heat exchanger 101 is switched off is the shut-off valve 115 opened and the cooled water can flow due to gravity from the section of the inflow line 104 shortly before the cross-flow heat exchanger 101 via the intermediate line 114 into the cooling medium basin 102.
  • the water is to continue to circulate without the cross-flow heat exchanger 101, it is switched via a three-way valve 116, which is arranged in the inflow line 104 behind the consumer 111 and in front of the intermediate line 112, in such a way that the water is led directly into the cooling medium basin 102 via a short line 117 flows.
  • a three-way valve 116 instead of the three-way valve 116, two two-way valves can also be used.
  • the short line 117 ends below the water level in the cooling medium basin 102.
  • the short line 117 should end below the water level in order to reduce the oxygen absorption of the cooling water to a minimum.
  • the water circulates between the consumer 111 and the cooling medium basin 102 based on the pump output.
  • the water level in the cooling medium basin 102 is controlled by a level monitor 125.
  • cooling circuit device presents its damped temperature rise and cooling behavior due to the intermediate cooling medium basin 102.
  • This cooling medium basin 102 absorbs the sudden changes in temperature that occur in consumers, in particular ovens. This considerably simplifies the control settings and the switching cycles of the Fans (14) minimized.
  • known closed cooling circuits with air coolers, in particular cross-flow heat exchangers great efforts must otherwise be made in terms of control technology in order to get this problem under control.
  • FIG. 4 shows a cross-flow heat exchanger 101 and a cooling circuit arrangement according to FIG. 3.
  • a consumer 111 two consumers 111 'and 111 "connected in parallel are shown in the form of two ovens. The coils of the ovens give off heat in the process.
  • a non-return flap 118 and an emergency water valve 119 are arranged in the respective supply section of the inflow line 104 in front of the respective consumer 111 ', 111 ". Should the temperature of the water at one or both consumers 111' and 111" rise too high, the pump fail or in the event of a power failure, cool water - usually normal water from the municipal utility company - can be supplied via the emergency water valve 119 in front of the consumers 11 T and 111 "and after cooling the consumers 111 " and 111 "can flow into an outflow channel 108 via the overflow 113
  • Check valve 118 is to bring the emergency water to the consumers in emergency water operation for cooling, ie to prevent direct drainage of the emergency water to the cooling medium basin 102 and via the overflow 113 into the outflow channel 108.
  • the emergency water can also be used to raise the water level the respective oven coil at a certain level If the water level drops unexpectedly, the oven coil to be cooled would otherwise be destroyed from top to bottom.
  • a temperature control valve 120 is arranged in the respective supply section of the inflow line 104 after the respective consumer 111 ', 111 ".
  • the temperature of the heated water is determined on this temperature control valve 120.
  • This should be> 70 ° C can be regulated by means of control valves (not shown) by throttling or expanding the water inflows at the respective consumer 111 ', 111 ".
  • Such a temperature control can also be used with a single consumer become.
  • the temperature of the water in the respective sections of the feed lines 104 immediately behind the ovens should be as high as possible. After cooling in the heat exchanger 101, the temperature of the water should still be at least 20 ° C.
  • the temperature of the cooled water is recorded with a means for temperature detection 124, in particular with a PT100.
  • the switchgear 121 is connected in series with the cooling circuit.
  • the switchgear assembly 121 is arranged via its own heat exchanger 122 with the inflow line 104 between the pump 110 and the furnaces 111 ', 111 ".
  • the switchgear assembly 121 heats the water assigned to it. This water can be mixed with 0.3% corrosion agent (inhibitor). It is also possible to work with demineralized water, which flows to the heat exchanger 122 of the switchgear and is cooled there by the cool water of the inflow line 104.
  • Such a series connection of the heat exchanger 122 is recommended for switchgear 121 with a lower output.
  • the advantage of switching in series is that the circulating quantities of water and thus the pump output can be kept low.
  • a switchgear of very high power should be separately via an independent, i.e. H. circuit independent of the furnace circuit.
  • FIG. 4 also shows a heat recovery device 123 in the form of a heat exchanger connected in series behind the furnaces.
  • This heat recovery device 123 is optional, i. H. can be switched on if required.
  • Heat recovered via the heat exchanger can e.g. B. be used for heating circuits or hot water circuits.
  • the cooling circuit presented in Fig. 4 is, for. B. used in furnaces in which 3000 KW heat loss must be carried away during operation. At the weekend, when the stove cannot be used, heat losses must continue to be be performed, which decrease continuously on z. B. up to 190 KW.
  • the cooling circuit must also be switched down accordingly. It may take 12 hours for a brick lining to cool down.
  • Aeration device 107 Aeration device

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

L'invention concerne un dispositif de circuit de refroidissement comprenant un échangeur thermique (101) pouvant être vidé, un réservoir d'agent réfrigérant (102), une conduite d'alimentation (104) allant du réservoir d'agent réfrigérant (102) à l'échangeur thermique (101), une conduite d'évacuation (103) allant de l'échangeur thermique (101) au réservoir d'agent réfrigérant (102) et une pompe (110) intercalée dans la conduite d'alimentation (104) pour pomper l'agent réfrigérant vers l'échangeur thermique (101). Ce dispositif comporte en outre un consommateur (111), une conduite courte (117) dont l'extrémité inférieure débouche dans le réservoir d'agent réfrigérant (102) et l'extrémité supérieure est reliée par une soupape à trois voies (116) ou par deux soupapes à deux voies à la conduite d'alimentation (104) entre le consommateur (111) et l'échangeur thermique (101), ainsi qu'une conduite intermédiaire (114) pourvue d'un clapet anti-retour (115), cette conduite intermédiaire ayant une extrémité inférieure qui débouche dans le réservoir d'agent réfrigérant (102) et une extrémité supérieure qui est reliée à la conduite d'alimentation (104) entre la soupape à trois voies (116) et l'échangeur thermique (101) ou entre les deux soupapes à deux voies et l'échangeur thermique (101).
EP04718903A 2004-03-10 2004-03-10 Dispositif de circuit de refroidissement Expired - Lifetime EP1730459B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DE2004/000469 WO2005088217A1 (fr) 2004-03-10 2004-03-10 Dispositif de circuit de refroidissement

Publications (2)

Publication Number Publication Date
EP1730459A1 true EP1730459A1 (fr) 2006-12-13
EP1730459B1 EP1730459B1 (fr) 2007-08-22

Family

ID=34957279

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04718903A Expired - Lifetime EP1730459B1 (fr) 2004-03-10 2004-03-10 Dispositif de circuit de refroidissement

Country Status (2)

Country Link
EP (1) EP1730459B1 (fr)
WO (1) WO2005088217A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019110237A1 (de) * 2019-04-18 2020-10-22 Güntner Gmbh & Co. Kg Wärmeübertrageranordnung mit wenigstens einem Mehrpass-Wärmeübertrager und Verfahren zum Betrieb einer Wärmeübertrageranordnung
DE102019110236A1 (de) * 2019-04-18 2020-10-22 Güntner Gmbh & Co. Kg Wärmeübertrageranordnung mit wenigstens einem Mehrpass-Wärmeübertrager und Verfahren zum Betrieb einer Wärmeübertrageranordnung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1189571B (de) * 1954-12-22 1965-03-25 Licencia Talalmanyokat Verfahren und Vorrichtung zur Verhinderung des Einfrierens von Waermeaustauschern bei Frostgefahr
FR2365769A1 (fr) * 1976-09-28 1978-04-21 Chausson Usines Sa Procede et dispositif pour faire varier la capacite de refroidissement d'une tour seche
HU193135B (en) * 1985-10-24 1987-08-28 Energiagazdalkodasi Intezet Auxiliary plant for operating air-cooled equipments particularly preventing winter injuries and air-cooled cooling tower provided with such auxiliary plant
DE19613910B4 (de) 1996-04-06 2005-03-10 Tino Cabero Querstromwärmetauscher sowie Heiz- oder Kühleinrichtung umfassend einen Querstromwärmetauscher
DE10307065B4 (de) * 2003-02-19 2007-10-04 Otto Junker Gmbh Kühlkreislaufvorrichtung und Kühlverfahren

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005088217A1 *

Also Published As

Publication number Publication date
EP1730459B1 (fr) 2007-08-22
WO2005088217A1 (fr) 2005-09-22

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