EP1902268B1 - Wärmetausher - Google Patents

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Publication number
EP1902268B1
EP1902268B1 EP06753323A EP06753323A EP1902268B1 EP 1902268 B1 EP1902268 B1 EP 1902268B1 EP 06753323 A EP06753323 A EP 06753323A EP 06753323 A EP06753323 A EP 06753323A EP 1902268 B1 EP1902268 B1 EP 1902268B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
primary
valve
flow path
exchanger according
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.)
Not-in-force
Application number
EP06753323A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1902268A1 (de
Inventor
Urh Hudoklin
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.)
Danfoss AS
Original Assignee
Danfoss AS
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 Danfoss AS filed Critical Danfoss AS
Publication of EP1902268A1 publication Critical patent/EP1902268A1/de
Application granted granted Critical
Publication of EP1902268B1 publication Critical patent/EP1902268B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/005—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
    • 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
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/005—Arrangements for preventing direct contact between different heat-exchange media

Definitions

  • the invention relates to a heat exchanger with a housing having a primary inlet port, a primary outlet port, a secondary inlet port and a secondary outlet port, wherein between the primary inlet port and the primary outlet port a primary primary side flow path and between the secondary inlet port and the secondary outlet port a secondary flow path of a secondary side is arranged, wherein the primary flow path with the secondary flow path is in heat-transmitting connection and the heat exchanger has at least one control auxiliary device which is arranged in the primary flow path and in the secondary flow path.
  • Such a heat exchanger is for example off EP 608 195 B1 known.
  • a temperature sensor is integrated and measures both the temperature in the primary and secondary flow path.
  • the temperature sensor is located in a cylindrical tube and is in communication with a valve outside the housing.
  • Heat exchangers are used to transfer thermal energy from a primary medium to a secondary medium without mixing the two media.
  • the first medium water of a district heating system and the second medium water in drinking water quality.
  • at least one medium may be gas.
  • auxiliary control devices such as, for example, sensors, which are required for the operation of the heat exchanger, are integrated in the heat exchanger.
  • the invention has the object to improve a heat exchanger constructive.
  • control auxiliary device is passed through a gap which is arranged between the primary flow path and the secondary flow path.
  • the transition regions, and thus the interfaces between the primary flow path and the secondary flow path, are isolated from one another by the primary flow path and the secondary flow path each adjoining the gap.
  • the gap is then between the primary and the secondary side of the heat exchanger.
  • the primary and secondary flow paths are spaced apart in this part of the heat exchanger.
  • the control auxiliary device is thereby guided through the intermediate space and is thus simultaneously arranged in three areas, namely in the intermediate space and in the areas to the right and left of the intermediate space.
  • Control aids are here, for example used for controlling or regulating the heat exchanger and act, for example, mechanically or thermally.
  • a monitoring sensor can be arranged, which detects an entry of the fluid into the intermediate space. It can then be initiated further measures that prevent greater leakage, such as shutting off the inlet and outlet lines.
  • the gap communicates with an environment of the housing.
  • the gap may have a small volume.
  • the volume of the gap can then be designed only for small amounts of leakage, as in case of failure, fluid can be passed on to the outside.
  • the heat exchanger is not significantly larger by the gap than a heat exchanger without this gap.
  • fluid enters the gap it may, for example, evaporate due to its heat and through the adjacent heated primary and secondary sides. It For example, leaks occur when the fluid in the primary line rises to higher temperatures than intended. The fluid then expands due to the elevated temperature and requires more space. At a weak point, such as a seal, the fluid tries to escape. It gives the fluid with the arrangement of the intermediate space a predetermined breaking point.
  • the intermediate space absorbs the fluid and at the same time reduces the overpressure caused by the fluid.
  • the intermediate area relieves the remaining areas of the heat exchanger by the gap is in communication with the environment of the housing, so that an overpressure can escape. Although some fluid is then lost, but there is no longer any danger that other areas of the heat exchanger are affected by a pressure increase.
  • the gap is at least partially bounded by the housing.
  • the housing thus encloses at least a portion of the primary and a portion of the secondary flow path and the space.
  • the gap may be bounded by the walls of the primary and secondary flow paths on its other walls, which are not formed by the housing. It is therefore provided without a lot of material, the gap.
  • the intermediate space has at least one opening which is arranged in the housing.
  • the intermediate space thus directly adjoins the housing and has at least one opening which connects the intermediate space with the environment to the outside. There are thus no channels necessary, which could hinder the drainage or evaporation of leaked fluid.
  • control auxiliary device is a first valve tappet of a first valve.
  • the first valve is thus a cartridge valve, since it is at least partially disposed within the heat exchanger. On This way one achieves a compact design of the heat exchanger.
  • the first valve tappet is arranged simultaneously in at least one actuation position in the primary and secondary flow paths as well as in the intermediate region.
  • the first valve is arranged in the region of the secondary inlet port.
  • the valve is inserted, for example, at the secondary inlet port from the outside into the housing of the heat exchanger and connected against falling out by a screw connection to the housing.
  • the first valve is thus easily replaceable and sufficiently fixed at a resulting overpressure of the fluid.
  • the first valve is thermally stressed, since on the secondary side of the heat exchanger, the fluid is heated by the fluid of the primary side and the fluid at the secondary inlet port has a lower temperature than the secondary outlet port.
  • the primary inlet port comprises a first valve seat of the first valve. It is thus possible to control the inflow of the fluid in the primary inlet port with the first valve. This is particularly easy when the primary inlet port and the secondary outlet port are opposed and the ports are on a straight line connection.
  • the first valve seat is fixed to the housing arranged in the primary inlet port and seals at the same time when the first valve is closed, the primary inlet port.
  • a first valve member of the first valve which cooperates with the valve seat is conveniently flowable through the primary inlet port.
  • the first valve has a diaphragm which contacts fluid of the secondary flow path.
  • a membrane reacts almost inertia to set pressure changes in the secondary Inlet port. Accordingly, the first valve has a short reaction time.
  • the first valve stem with the membrane is actuated. It thus uses the almost inertia-free response of the membrane for the valve lifter. Thus, one can influence the fluid flow in the primary flow path without delay in dependence on the fluid flow in the secondary flow path.
  • control auxiliary device is a temperature sensor.
  • the control auxiliary device is a temperature sensor.
  • the control auxiliary device is a temperature sensor.
  • the temperature of the fluid inside the heat exchanger You then have the opportunity to make the heat exchanger safer due to a measured temperature. This happens, for example, by monitoring a fluid temperature in the heat exchanger. At too high a temperature of the fluid, measures are taken to protect a user from burns. Also, the room conditions of the heat exchanger is effectively used by an integrated temperature sensor inside the housing.
  • the temperature sensor communicates with the gap via a fluid path.
  • the temperature sensor may, for example, use the gap as reference point for temperature measurement.
  • the temperature sensor may extend into the gap during a thermal expansion. In this way, no additional space is needed in a warming and prevents a pressure increase due to a material expansion of the temperature sensor.
  • the gap can also serve to equalize the pressure.
  • the temperature sensor comprises a bellows, wherein the interior of the bellows is delimited from a sensor space and the interior the bellows communicates with the gap.
  • the bellows is a moving part of the temperature sensor that changes in geometry due to temperature changes.
  • the geometry of the movable bellows is effected solely by the temperature of an expandable material in the sensor space.
  • the sensor space has no connection to another room and is closed.
  • the temperature sensor is in communication with a second valve stem of a second valve.
  • the temperature sensor can thus act directly on a second valve.
  • the second valve lifter is at least partially disposed within the housing. This ensures that the movement space of the second valve stem is independent of external geometries of the second valve.
  • the second valve is arranged in the region of the primary outlet port.
  • the primary side fluid has a lower temperature than the primary inlet port.
  • the thermal load of the second valve is kept so low. If the primary outlet port is arranged opposite to the secondary outlet port, then it is possible in a simple manner to actuate the second valve as a function of the measured temperature in the secondary connection region.
  • the second valve has a return spring which presses a valve element against a second valve seat, thereby closing the primary outlet port.
  • the return spring causes a counterforce to the force generated by the inflowing fluid of the primary flow path to the valve element. If the counterforce of the return spring is overcome, then the second valve is in the open position.
  • the opposing force of the return spring is adjustable, so that you can adjust the second valve to different operating conditions.
  • the heat exchanger comprises heat exchanger plates, wherein in a first region the primary and secondary flow paths are arranged parallel to one another and in a second region the primary and secondary flow paths are arranged diagonally to one another.
  • the flow paths it is possible to simultaneously operate an integrated temperature sensor, a first and a second valve, which are each arranged at least partially within the housing.
  • the primary inlet port is arranged opposite the secondary inlet port and at the same time the primary outlet port is arranged opposite the secondary outlet port.
  • the higher the number of heat exchanger plates the more heat the heat exchanger can deliver at the same time. This is for example advantageous if the heat exchanger is provided for a space heating system.
  • Fig. 1 schematically shows a sectional view of a heat exchanger 1 with a housing 2 having a primary inlet port 3, a primary outlet port 4, a secondary inlet port 5 and a secondary outlet port 6. Between the primary inlet port 3 and the primary outlet port 4, a primary flow path 7 of a primary side 8 and between the secondary inlet port 5 and the secondary outlet port 6, a secondary flow path 9 of a secondary side 10 is arranged.
  • the flow paths 7,9 are only partially visible. The flow direction is shown by arrows 11.
  • the primary side fluid 8 enters at the primary inlet port 3 and exits at the primary outlet port 4.
  • the secondary side fluid 10 enters the secondary inlet port 5 and the secondary outlet port 6 accordingly.
  • the fluid of the primary side 8 gives off heat to the fluid of the secondary side 10, so that the fluid of the secondary side 10 is heated. Consequently, the fluid of the primary side 8 at the primary inlet port 3 is warmer than at the primary outlet port 4. The fluid of the secondary side 10 is colder at the secondary inlet port 5 than at the secondary outlet port 6.
  • the heat exchanger 1 in Fig. 1 has a first region 12, a second region 13 and a third region 14.
  • the first region 12 extends from the side of the housing 2 to the primary outlet port 4 and the secondary inlet port 5 to the third region 14.
  • the second region 13 extends from the side of the housing 2 to the primary inlet port 3 and the secondary outlet port 6 to the third region 14.
  • a first valve stem 15 extends from the secondary flow path 9 in the first region 12 through the third region 14 into the primary flow path 7 in the second region 13.
  • the first valve stem 15 is part of a first valve 16 located at the secondary inlet port 5 is arranged and extends partially into the interior of the housing 2.
  • the first valve 16 is a cartridge valve having a diaphragm 17 acting on the first valve lifter 15.
  • the first valve 16 is also operable from the outside, for example by a coupling to the primary inlet port 3 or to the secondary outlet port 6 is made, which acts on an actuator of the first valve 16.
  • the first valve lifter 15 in Fig. 1 has on the opposite side of the secondary inlet port 5, a first valve element 18.
  • the first valve member 18 cooperates with a first valve seat 19 disposed in the primary inlet port 3.
  • the primary and secondary inlet ports 3,5 are disposed opposite to the housing 2 so that the first valve lifter 15 is axially movably supported on a straight line connecting the primary and secondary inlet ports 3,5.
  • the third region 14 in the housing 2 of the heat exchanger 1 has a gap 20 which partially receives the valve stem 15.
  • seals 21 are used in each case.
  • the seals 21 simultaneously guide the first valve lifter 15, so that no further bearing on the openings of the boundaries of the areas 12,13,14 are necessary.
  • the intermediate space 20 in the third region 14 has direct access to the surroundings of the housing 2.
  • the intermediate space 20 has an opening 22 which at the same time is an opening in the housing 2.
  • the primary flow path 7 is opened to some degree by the action of the membrane 17. If one of the seals 21 leaks during operation, the fluid flows into the intermediate space 20 and evaporates there due to the existing high temperatures in the intermediate space 20 or emerges from the opening 22. This prevents fluid of the primary or secondary side 8,10 mixed with fluid of the secondary or primary side 10,8 and thereby, for example, contamination of a fluid is formed.
  • the gap 20 also prevents that from the primary side 8 to the secondary side 10 or vice versa, a pressure is transmitted in case of failure.
  • the primary side 8 and the secondary side 10 are thus decoupled from one another and do not influence each other in the event of a leak due to spaced boundary walls 23, 24 of the first area 12 and second area 13 with the third area 14 therebetween.
  • Fig. 2 is a schematic sectional view of another heat exchanger 25 with an integrated temperature sensor 26 is shown.
  • the temperature sensor 26 extends in the axial direction from the primary flow path 7 in the first region 12 via the gap 20 in the third region 14 in the secondary flow path 9 in the second region 13 of the heat exchanger 25.
  • the temperature sensor 26 has a bellows 27 which in its axial Extension is changeable and includes a gas.
  • the temperature sensor has a sensor chamber 28, which has an expansible medium, which is in thermal communication with a measuring point 29 of the temperature sensor and reacts to temperature changes in the region of the secondary outlet port 6.
  • the measuring point 29 extends into the secondary outlet port 6 and measures there the temperature of the fluid of the secondary side 10th
  • the sensor space 28 of the temperature sensor 26 is closed and acts on the outer surface of the bellows 27.
  • the interior of the bellows 27 communicates via a fluid path with the gap 20 of the third area 14, which in turn communicates outwardly via the opening 22.
  • the temperature sensor 26 is prevented from being affected by the temperature of the primary flow path 7. Upon heating of the primary flow path 7 in the first region 12, the pressure inside the bellows 27 would increase without further measures.
  • the primary outlet port 4 On the opposite side of the secondary outlet port 6 in Fig. 2 the primary outlet port 4 is arranged, which has the second valve 30 with a second valve tappet 31.
  • the second valve lifter 31 is connected to the temperature sensor 26 at a first axial end and to a return spring 32 at a second axial end.
  • a second valve element 33 is arranged in the region of the primary outlet port 4, which cooperates with a second valve seat 34 of the second valve 29.
  • the second valve 29 is in the closed position when a restoring force of the return spring 32 is greater than a counterforce of the temperature sensor 26. In the closed position of the second valve 30, the fluid flow through the primary side 8 of the heat exchanger 25 is interrupted.
  • the primary outlet port 4 is controllable in dependence on the temperature of the fluid in the secondary outlet port 6.
  • the second valve 30 at the primary outlet port 4 and the temperature sensor 26 inside the housing 2 By the opposite arrangement of the primary outlet port 4 and secondary outlet port 6 with the second valve 30 at the primary outlet port 4 and the temperature sensor 26 inside the housing 2, a quick reaction in the primary outlet port 4 is possible.
  • the heat exchanger 25 is thereby reliable and reacts almost instantaneously to excessive temperatures of the fluid at the secondary outlet port. 6
  • Fig. 3 shows a schematic view of another heat exchanger 35 with a plurality of heat exchanger plates 36 within the housing 2.
  • the heat exchanger plates 36 are each arranged in the first region 12 and the second region 13, wherein in Fig. 3 the first region 12 is arranged axially to the right of the third region 14 and the second region 13 is arranged axially to the left of the third region 14.
  • Adjacent primary and secondary flow paths 7, 9 run parallel to one another in the first region 12 and diagonally to one another in the second region 13.
  • the gap 20 is arranged.
  • the primary and secondary flow paths run 7.9 parallel to each other, but approximately at right angles to the primary and secondary flow paths 7.9 in the first and in the second region 12,13.
  • Fig. 3 shows a schematic view of another heat exchanger 35 with a plurality of heat exchanger plates 36 within the housing 2.
  • the heat exchanger plates 36 are each arranged in the first region 12 and the second region 13, wherein in Fig. 3 the first region 12 is arranged axially to the right of
  • the primary and secondary flow paths 7, 9 extend vertically in the first and second regions 12, 13 and horizontally in the third region 14.
  • Heat exchanger plates 36 of the primary side 8, which are flowed through with fluid of the primary side 8, are alternately arranged with heat exchanger plates 36 of the secondary side 10, in which fluid of the secondary side 10 flows.
  • In the first region 12 of the primary outlet port 4 and the secondary inlet port 5 are arranged on the housing 2.
  • In the second region 13 of the primary inlet port 3 and the secondary outlet port 6 are arranged on the housing 2.
  • the heat exchanger 35 in Fig. 3 can as before in the Fig. 1 and 2 be described described.
  • the first valve 16 is arranged spatially between the primary inlet port 3 and the secondary inlet port 5.
  • the temperature sensor 26 is disposed between the secondary outlet port 6 and the primary outlet port 4, the temperature sensor 26 acting on the second valve 30 at the primary outlet port 4. This shows Fig. 4 ,
  • FIG. 4 another embodiment of a heat exchanger 37 is shown.
  • the heat exchanger 37 is a combination of the heat exchanger 1 Fig. 1 and the heat exchanger 25 off Fig. 2 with the arrangement of the heat exchanger plates 36 and the flow paths 7,9 after Fig. 3 ,
  • the heat exchanger 37 thus has both a temperature control or regulation as well as a pressure control or regulation. Whether there is a control or regulation, depends on the activation of the first and the second valve 16, 30 from the outside. Preferably, one uses a scheme.
  • the first valve 16 is designed here as a proportional valve. Between the first region 12 and the second region 13, cylinders 38 are arranged, which space the first region 12 and the second region 13 from one another. This results in the third region 14 with the intermediate space 20, which is in communication with the environment of the housing 2 outside the heat exchanger 37.
  • the primary flow path 7 is opened to some degree.
  • the heat exchanger 37 reacts almost without inertia to changes in the secondary inlet port 5 while changing the inflow on the primary side 8. If a too high temperature measured at the measuring point 29 of the temperature sensor 26 during operation, the temperature sensor 26 acts by the change of its bellows 27th due to an expansion of an expandable material within the sensor space 28 to the second valve 30.
  • the second valve 30 is throttled in such a case or completely closed. In this way, excessive temperatures are avoided in the removal of the fluid on the secondary side 10.

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)
  • Temperature-Responsive Valves (AREA)
  • Power Steering Mechanism (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Switches With Compound Operations (AREA)
  • Mechanical Operated Clutches (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
EP06753323A 2005-07-02 2006-06-30 Wärmetausher Not-in-force EP1902268B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005031026A DE102005031026B3 (de) 2005-07-02 2005-07-02 Wärmetauscher
PCT/DK2006/000386 WO2007003193A1 (de) 2005-07-02 2006-06-30 Wärmetausher

Publications (2)

Publication Number Publication Date
EP1902268A1 EP1902268A1 (de) 2008-03-26
EP1902268B1 true EP1902268B1 (de) 2009-04-22

Family

ID=37004332

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06753323A Not-in-force EP1902268B1 (de) 2005-07-02 2006-06-30 Wärmetausher

Country Status (7)

Country Link
EP (1) EP1902268B1 (zh)
CN (1) CN101258377B (zh)
AT (1) ATE429624T1 (zh)
DE (2) DE102005031026B3 (zh)
DK (1) DK1902268T3 (zh)
RU (1) RU2363904C1 (zh)
WO (1) WO2007003193A1 (zh)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT504761B1 (de) * 2007-01-25 2008-10-15 Herz Armaturen Gmbh Vorrichtung zur regelung der temperatur von brauchwasser
SE533810C2 (sv) * 2009-06-04 2011-01-25 Alfa Laval Corp Ab Plattvärmeväxlare med temperatursensor för flödesstyrning
IT1397911B1 (it) * 2010-01-28 2013-02-04 Alfa Laval Corp Ab Sistema di distribuzione del fluido refrigerante in un dispositivo di scambio termico
ES2700399T3 (es) 2012-06-14 2019-02-15 Alfa Laval Corp Ab Intercambiador de calor de placas
EP2980520B1 (en) * 2013-03-29 2019-02-20 Hisaka Works, Ltd. Plate-type heat exchanger
JP5918904B2 (ja) * 2013-03-29 2016-05-18 株式会社日阪製作所 プレート式熱交換器
WO2014155839A1 (ja) * 2013-03-29 2014-10-02 株式会社日阪製作所 プレート式熱交換器
DE102022116997A1 (de) 2022-07-07 2024-01-18 Mahle International Gmbh Wärmeübertrager mit gesteuertem Druckverlust

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2509030A1 (fr) * 1981-07-03 1983-01-07 Damois Pierre Echangeur de chaleur a detection de fuites
DK9300044U4 (da) * 1993-01-21 1994-05-27 Tarm H S As Pladevarmeveksler og varmevekslersystem med pladevarmeveksler
DE19501467C2 (de) * 1995-01-19 1999-12-02 Email Cover R Scholz Gmbh Sicherheitswärmeaustauscher in Rohr- und Plattenbauweise mit Überwachung interner Dichtigkeit
SE521916C2 (sv) * 1997-02-25 2003-12-16 Ep Technology Ab Plattvärmeväxlare med läckageutsläpp
NL1007523C2 (nl) * 1997-11-12 1999-05-17 Coram International B V Ophanginrichting.
SE518475C2 (sv) * 2001-02-20 2002-10-15 Alfa Laval Ab Plattvärmeväxlare med sensoranordning
US7147037B2 (en) * 2003-10-23 2006-12-12 Siemens Power Generation, Inc. Leak detector for mixed heat exchangers

Also Published As

Publication number Publication date
ATE429624T1 (de) 2009-05-15
CN101258377A (zh) 2008-09-03
DE502006003550D1 (en) 2009-06-04
EP1902268A1 (de) 2008-03-26
DE102005031026B3 (de) 2007-04-12
RU2363904C1 (ru) 2009-08-10
DK1902268T3 (da) 2009-08-10
WO2007003193A1 (de) 2007-01-11
CN101258377B (zh) 2010-11-03

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