EP3186488A1 - Turbine dotée d'un agencement de joint d'étanchéité, installation à cycle de rankine organique et procédé de confinement du fluide fonctionnel - Google Patents

Turbine dotée d'un agencement de joint d'étanchéité, installation à cycle de rankine organique et procédé de confinement du fluide fonctionnel

Info

Publication number
EP3186488A1
EP3186488A1 EP15766649.6A EP15766649A EP3186488A1 EP 3186488 A1 EP3186488 A1 EP 3186488A1 EP 15766649 A EP15766649 A EP 15766649A EP 3186488 A1 EP3186488 A1 EP 3186488A1
Authority
EP
European Patent Office
Prior art keywords
chamber
fluid
turbine
operating fluid
vessel
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Withdrawn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
EP15766649.6A
Other languages
German (de)
English (en)
Inventor
Roberto Bini
Mario Gaia
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.)
Turboden SpA
Original Assignee
Turboden SpA
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 Turboden SpA filed Critical Turboden SpA
Publication of EP3186488A1 publication Critical patent/EP3186488A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
    • F01D11/04—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N39/00—Arrangements for conditioning of lubricants in the lubricating system
    • F16N39/005—Arrangements for conditioning of lubricants in the lubricating system by evaporating or purifying
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
    • F16N7/38—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with a separate pump; Central lubrication systems
    • F16N7/40—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with a separate pump; Central lubrication systems in a closed circulation system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/60—Shafts
    • F05D2240/63—Glands for admission or removal of fluids from shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/60—Fluid transfer
    • F05D2260/609—Deoiling or demisting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/6659—Details of supply of the liquid to the bearing, e.g. passages or nozzles
    • F16C33/667—Details of supply of the liquid to the bearing, e.g. passages or nozzles related to conditioning, e.g. cooling, filtering

Definitions

  • the present invention refers to a seal arrangement in a turbine operating in a
  • the invention can be applied also to feeding pump used in the Rankine cycle ORC plants.
  • ORC Organic Rankine cycle
  • thermodynamic cycle biomass In plants exploiting this thermodynamic cycle biomass is often used to generate the heat necessary for vaporizing the organic operating fluid, or waste heats of industrial processes.
  • the operating fluid is expanded in a turbine to which an electric generator is usually connected for producing electric power.
  • the organic operating fluid In most of the Rankine cycle ORC plants, the organic operating fluid must necessarily remain confined in the plant, in order to avoid atmosphere contaminations. On the other hand air must not entry the thermodynamic cycle, as the organic operating fluid would be subject to oxidation and corrosion phenomena favored by oxygen and, furthermore, the humidity in the air would pollute the operating fluid.
  • the confinement of the organic operating fluid must prevent both the leaks thereof in the surrounding environment and the air input into the plant.
  • Figure 1 shows a classic solution according to the known art: the turbine 1 and the generator 2 are coupled directly and isolated inside a casing 3.
  • the shaft 4 of the turbine 1 and the generator 2 both rotate in the same volume defined by the volute 3, in which there is the operating fluid.
  • the shaft 4 of the turbine does not cross the casing 3 and, therefore, the risk of operating fluid leaks is confined to stationary seals only.
  • Electric power produced by the generator is transmitted to the outside through convenient electric connectors 5 constrained to the volute 3, these being obviously fluid-tight, to which corresponding cables can be connected.
  • This solution suffers from the drawback of exposing the electric generator to the operating fluid. As the insulation of electric windings of the generator 2 are continuously in contact with the operating fluid, in the long run it can be damaged and impaired.
  • FIG. 2 shows an evolution of the previous solution, still according to the known art.
  • the stator part and the rotor part of the generator are kept fluidically separated by a cylindrical septum 6, called liner, and gaskets 7.
  • bearings 8 (schematized) supporting the shaft 4 are exposed to the operating fluid, therefore the latter having to act also as lubricating and cooling fluid.
  • the operating fluid is discharged through convenient portholes.
  • magnetic, radial and axial bearings have been proposed.
  • Figure 3 shows one of the arrangements provided by the norm: it is an arrangement named "Double seal” or “Tandem seal” of "back to back” type, particularly recommended when a possible leak of operating fluid in the environment cannot be accepted.
  • the back part of the seals 10 and 11 abuts against corresponding countercheck elements 12 and 13, i.e. the seals are pushed in the opposite direction.
  • the seals 10 and 11 and the corresponding countercheck elements 12 and 13 reciprocally move due to the rotary movement of the shaft.
  • It is an arrangement providing for an intermediate chamber 9 between the bearings supporting the turbine shaft and the zone where the operating fluid expands.
  • the pressure of a sealing fluid, definable barrier fluid is kept greater with respect to the pressure of the operating fluid in the zone adjacent the turbine.
  • oil or water is used as barrier fluid.
  • Figure 4 shows another arrangement provided in the norm, this time of the "face to face " type, the seals being pushed one against the other.
  • the seals 10, 11 slide axially in order to move in abutment at the respective front face against only one ring 14 provided in the seals themselves, on which the countercheck elements 12 and 13 are provided.
  • Figures 5, 5a and 5b are schematic views in axially symmetrical section of corresponding double-sealed arrangements, which are used in conventional Rankine and not-organic ORC cycle turbines, particularly adapted for being used where the peripheral speed at the slide surfaces is high, greater than 10 m/s.
  • the solution shown in figure 5 is of "back to back” type with the seals 10 and 11 pushed in opposite directions by corresponding springs 15 and 16 towards the countercheck elements 12 and 13.
  • the seal is realized at the interface SI and S2 between, respectively, the seal 10 and the countercheck element 12 and between the seal 11 and the countercheck element 13.
  • a barrier liquid is fed through a feeding duct A, which is then drained by several output ducts B and C, in case also through the interfaces SI and S2 if the seal is not perfect.
  • the flow of the mixture containing the possible flow rate of the barrier fluid able to cross the interface SI and part of the lubricating oil initially fed to the bearing 8, are drained.
  • the same operating fluid expanding in the turbine is fed to D.
  • Figure 5a shows a embodiment equivalent to that shown in figure 5, the difference being that the springs 15 and 16 have been replaced with metal bellows 15' and 16', which are more resistant against high temperatures and the abrasive action applied by the fluid polluted with solid substances, for example particulate.
  • Figure 5b is a embodiment substantially identical to that shown in figure 5, but provided with an additional sleeve 17 connected to the stationary portion of the turbine and provided with helical grooves generating an effect of fluid dynamic pumping.
  • the viscous friction of the fluid fed between the seals 10 and 11 exerts an action pumping onto the fluid itself, in the way defined by the tilt of the helical grooves of the sleeve 17. Thanks to the pumping effect, the barrier fluid is thrown against the base of the countercheck element 12 in the form of jet, as denoted by the arrow in figure.
  • the feeding of a minimal and controlled flow rate of barrier fluid is provided, in order to keep the faces separated from the seals and, therefore, to avoid the relative wear.
  • Solutions offered by the known art do not assure the effective confinement of the operating fluid in case in which the fluid is organic, as occurring in Rankine ORC cycles, and the turbine rotates at very high speed, i.e. typically at speeds higher than 10 m/s next to the slide surfaces.
  • barrier fluids such as oil or water
  • the present invention in a first aspect thereof, relates to a turbine according to claim 1 of an organic Rankine cycle ORC.
  • the turbine comprises a shaft supported by bearings and a plurality of mechanical seals arranged around the shaft, along the entire circumference thereof, for confining the operating fluid expanding in the turbine.
  • the seals are arranged so that to define and preserve the insulation of three consecutive chambers along the shaft of the turbine: a first chamber, a second buffer chamber and a third chamber.
  • the first chamber is between the expansion stages of the turbine and the buffer chamber, and the third chamber is between the bearings and the buffer chamber.
  • a barrier fluid is fed into the buffer chamber.
  • the barrier fluid is the same organic operating fluid fed to the turbine.
  • the effective confinement of the operating fluid and the guarantee of avoiding the contamination thereof are achieved.
  • the present invention concerns a method according to claim 9 for confining the operating fluid in a turbine working in an Organic Rankine Cycle ORC and preventing leaks into the surrounding environment.
  • figure 1 is a schematic view in axially symmetrical section of a sealed solution, according to the known art, between the turbine and the generator;
  • figure 2 is a schematic view in axially symmetrical section of another sealed arrangement according to the known art
  • figure 3 is a schematic view of an arrangement of seals according to norm ANSI/API;
  • figure 4 is a schematic view of another arrangement of seals according to norm ANSI/API;
  • figure 5 is a schematic view in axially symmetrical section of an arrangement of seals in a turbine, according to the known art
  • figure 5a is a schematic view in axially symmetrical section of a embodiment of the arrangement of seals shown in figure 5;
  • figure 5b is a schematic view in axially symmetrical section of a embodiment of the arrangement of seals shown in figure 5;
  • figure 6 is a schematic view, partially in axially symmetrical section, of an arrangement of seals according to the present invention.
  • figure 7 is a schematic view, partially in axially symmetrical section, of an apparatus comprising a turbine provided with the arrangement of seals shown in figure 6;
  • figure 8 is a scheme of a treating plant associated with the arrangement of seals according to the present invention
  • figure 9 is a scheme of another treating plant associated with the arrangement of seals according to the present invention.
  • Figures l-5b refer to double-sealed solutions according to the known art, in a “back to back” arrangement, and the respective description is given at the beginning of the text.
  • a turbine portion in an axially symmetrical section, is provided with fluidic seals 10 and 11 and with the corresponding countercheck elements 12 and 13, as in the scheme shown in figure 5.
  • the scheme of the seals is of "back to back” type, but in general the present invention can be implemented also with seals having "face to face” or “face to back” arrangements, which are not shown.
  • the barrier fluid fed into the buffer chamber 102 is the same organic operating fluid expanding in the turbine.
  • the feed of the barrier fluid is carried out by an apparatus 300, now described in detail.
  • the apparatus 300 comprises a vessel 301 in which there is the pressurized barrier fluid 302.
  • the pressurization can be obtained, for example, by feeding an inert gas such as nitrogen into the upper volume 303 of the vessel, above the open surface of the barrier fluid, through the line 309, or by prearranging an elastomeric bag always in the upper volume 303, the bag being inflatable with a fluid in turn pressurized.
  • the pressure of the barrier fluid 302 has to be sufficient to assure the good functioning of the seal 1 1 operating at the highest temperatures among all seals, without significantly producing fluid vapor at the interface S2.
  • the pressure p2 of the barrier fluid 302 in the buffer chamber 102 must be higher than the pressure pi in the adjacent chamber 101 nearest the turbine and also higher than the pressure p3 in the adjacent chamber 103 nearest the bearings 8. In other words, the following conditions must be simultaneously fulfilled:
  • p2 pi + n, where n is comprised between 1 bar and 3 bars.
  • the pressure p2 must not be lower than 1 bar than the vapor pressure of the barrier fluid 302, at the feed temperature.
  • the apparatus 300 is a closed circuit comprising a delivery line 304 of the barrier fluid 302 to the buffer chamber 102 and a corresponding return line 305 along which a cooling unit 306 and a circulation pump 307 are provided.
  • the latter can also not be present if a pumping ring, as depicted in figure 5b, having a sufficient predominance is provided.
  • a level controller LT i.e. a sensor detecting the level of the barrier fluid 302 by an appropriate logic control unit, controls the replenishment of the barrier fluid 302 through the replenishment line 308.
  • the barrier fluid (302) is fed into the first chamber 101 also through a feeding duct D, with a little mass throughput smaller than one hundredth of the flow rate of the operating fluid expanding in the turbine at full power, in case of liquid phase feed, in order to avoid the fed fluid from affecting banefully the process taking place in the ORC cycle.
  • the feed of the barrier fluid in D is operated by outside means, herein not described in detail. A higher flow rate of barrier fluid would subtract an excessive heat amount from the expanding fluid, such a heat not being available for use in the regenerator.
  • the seal 11 would not be particularly effective (considering that in a mechanical seal there is usually a little leak flow) and a not-permissible part of the barrier fluid would cross the interface S2, this should not lead to a turbine damage since, as mentioned, the barrier fluid and the operating fluid are the same fluid and contamination is not possible. If the flow rate of the barrier fluid should succeed in crossing the seal 11, it is simply mixed together with the operating fluid doing the cycle. In case wherein the seal 10 is not effective, a flow rate of barrier fluids could move into the chamber 103 where there is also the oil used for lubricating the bearings 8.
  • a treating device to treat the lubricating oil polluted by the barrier fluid is provided. Such a device is described referring to figure 7.
  • figure 7 shows the solution relating to figure 6, integrated in a plant provided with a turbine 1, equipped with a shaft 4 supported by the bearings 8.
  • numeral reference 400 it is generically denoted the apparatus for lubricating and treating the polluted lubricating oil returning from the line C.
  • the apparatus 400 comprises a vessel 401 for collecting the polluted lubricating oil suctioned by the pump 402 that send it to a treating unit 403, for example a unit performing the fractional distillation in a separation tray column, or a unit according to the known art.
  • a treating unit 403 for example a unit performing the fractional distillation in a separation tray column, or a unit according to the known art.
  • the line 404 returns the lubricating oil to the vessel 401.
  • a drain pipe of undesired fractions, residuals of the treatment is denoted.
  • the field technician must take care of designing the treating unit 403 to obtain both the barrier fluid 302 and the lubricating oil with a purity level sufficient for the condenser of the Rankine cycle ORC and the apparatus 400.
  • the collecting vessel 401 is kept pressurized through an apposite feeding line of pressurized gas, for example nitrogen or another inert gas.
  • pressurized gas for example nitrogen or another inert gas.
  • Such a line can be in turn fed by cylinders or other means.
  • the plant 600 comprises a sloped duct 601 receiving the fluid to be treated from drainages and feeding it to a compressor 602.
  • the fluid is compressed to a pressure higher than the atmospheric pressure, typically at 1.5 - 10 bars of absolute pressure, and sent to a vessel 603 for collecting and treating the compressed fluid.
  • a control unit adjusts the temperature of the fluid in the vessel 603 through a heating element 604.
  • an oil separator filter and/or a demister and a relief valve 605 from which the operating fluid purified from the lubricant or other contaminants is injected again in the Rankine cycle ORC, preferably at the condenser.
  • a container 606 for collecting the recovered lubricant is present downstream of the vessel 603.
  • the plant 600 can be designed to carry out the column separation according to the known art.
  • the bearings 8 are lubricated with the operating fluid additivated with a suspension of solid lubricant, i.e. additivated with microparticles of a solid having good lubricating and antiscufff features between metal surfaces.
  • a suspension of solid lubricant i.e. additivated with microparticles of a solid having good lubricating and antiscufff features between metal surfaces.
  • polytetrafluoroethylene PTFE particles are adapted for this purpose.
  • a grain size adapted for PTFE particles is, for example, the following: the diameter of less than 10% of the particles is comprised between 0.2 and 1 micron, the diameter of 99% of the particles is shorter than 10 microns.
  • the proportion by mass of particles with respect to the total content of the lubrication circuit is preferably comprised in the range 3% - 20%.
  • the collecting vessel 401 is preferably pressurized through an apposite feeding line of pressurized gas, for example nitrogen or another inert gas. Such a line can be in turn fed by cylinders or other means.
  • pressurized gas for example nitrogen or another inert gas.
  • Such a line can be in turn fed by cylinders or other means.
  • Figure 9 shows an alternative embodiment of the lubricating and treating apparatus 400 provided with a system 700 for separating the particles of solid lubricant.
  • the leakage of small amounts of operating fluid from the chamber 102 to the chamber 103, and therefore from the collecting vessel 401, can be predicted. Therefore, a certain amount of fluid has to be extracted from the vessel 401 to balance this incoming leakage flow-rate and avoid the consequent level decrease in the vessel 401.
  • the extracted fluid can be treated on the outside.
  • the extracted fluid can be filtered in a treating and filtering unit 703 fed by a pump 702 and provided with a return line 704 for the fluid added of particles towards the vessel 401.
  • the filtered and treated fluid is sent through the line 705 to the ORC process, preferably to the condenser 1000.
  • a valve 709 is provided and controlled in relation to the level transmitted by the instrument LT, which unloads to the ORC process the convenient fluid amount to maintain the level in the vessel 401 inside values adapted for a well pump functioning.
  • One or more stirrers can be added in the vessel 401 to guarantee a uniform suspension of particles in the vessel 401 itself, and then to guarantee a proper lubricating power of the operating fluid sent to the bearings 8.
  • the feeding circuit of the bearings 8 can be provided with filters for intercepting possible foreign bodies and particles that are excessively big, but it has to allow the passage of particles of solid lubricant without clogging risks.
  • the pressure in the environment of the bearings 8 is higher than the ambient pressure on the outside.
  • An effective solution to avoid the leak of operating fluid to the outside is to provide the shaft 4 with a seal, for example a mechanical seal 903, and to arrange on the shaft 4, more on the outside, a second seal 900 preferably of the labyrinth type; the environment 901 between the two seals 900 and 903 is kept slightly depressed by an aspirator connected to the duct 902. The suctioned fluid is sent to a vent towards the atmosphere or to the apparatus 400.
  • the separation of particles of solid lubricant in the unit 703 can happen by simply filtering through fabric or felt, or else porous sintered product, in case with the aid of a valve play to achieve a sporadic reverse scavenging of the filter.
  • a cyclonic static or rotating centrifugal separator can be used.
  • the apparatus 400 in case provided with the system 700 for separating the particles of solid lubricant if these particles are used in substitution of the lubricating oil, if necessary can be substituted or supplemented with a treating unit made according to the scheme of figure 8, but connected to the aeriform fluid above the open surface of the liquid contained in the vessel 401.
  • the treatment is applied to a gas mixture and a possible operating fluid, with a modest concentration of oil droplets or particles of suspended solid lubricant.
  • the treatment can be more effective than starting from a mixture of oil and operating fluid having principally oil, or from a liquid strongly added with particles.
  • the pressure of inert gas in the vessel 401 can be maintained slightly sub-atmospheric (1-5 mm of water column), so that to avoid every leak of oil, in case polluted with operating fluid, to the outside.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

L'invention porte sur une turbine (1) d'un cycle de Rankine organique, laquelle turbine comprend un arbre (4) soutenu par des paliers (8) et une pluralité de joints d'étanchéité (10, 11) disposés autour de l'arbre (4) pour confiner le fluide fonctionnel qui se détend dans la turbine. Les joints d'étanchéité sont agencés de façon à définir et à préserver l'isolation d'une première chambre (101), d'une deuxième chambre tampon (102) et d'une troisième chambre (103). La première chambre (101) se trouve entre les étages de détente de la turbine et la chambre tampon (102), et la troisième chambre (103) se trouve entre les paliers (8) et la chambre tampon (102). Un fluide barrière (302) est alimenté dans la chambre tampon (102). De façon avantageuse, le fluide barrière (302) est constitué par le même fluide fonctionnel organique que celui qui est alimenté à la turbine. L'invention porte également sur une installation à cycle de Rankine organique comprenant ladite turbine, ainsi que sur un procédé pour confiner le fluide fonctionnel dans une turbine fonctionnant dans un cycle de Rankine organique.
EP15766649.6A 2014-08-28 2015-08-26 Turbine dotée d'un agencement de joint d'étanchéité, installation à cycle de rankine organique et procédé de confinement du fluide fonctionnel Withdrawn EP3186488A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBS20140159 2014-08-28
PCT/IB2015/056480 WO2016030847A1 (fr) 2014-08-28 2015-08-26 Turbine dotée d'un agencement de joint d'étanchéité, installation à cycle de rankine organique et procédé de confinement du fluide fonctionnel

Publications (1)

Publication Number Publication Date
EP3186488A1 true EP3186488A1 (fr) 2017-07-05

Family

ID=51951864

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15766649.6A Withdrawn EP3186488A1 (fr) 2014-08-28 2015-08-26 Turbine dotée d'un agencement de joint d'étanchéité, installation à cycle de rankine organique et procédé de confinement du fluide fonctionnel

Country Status (2)

Country Link
EP (1) EP3186488A1 (fr)
WO (1) WO2016030847A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2964916A (en) * 1957-10-14 1960-12-20 British Oxygen Co Ltd Production of inert atmospheres in storage vessels, fuel tanks and the like
GB9306890D0 (en) * 1993-04-01 1993-06-02 Bmw Rolls Royce Gmbh A gas turbine engine with bearing chambers and barrier air chambers
DE102007037311B4 (de) * 2007-08-08 2009-07-09 GMK Gesellschaft für Motoren und Kraftanlagen mbH Wellendichtung für eine Turbine für eine ORC-Anlage, ORC-Anlage mit einer derartigen Turbinenwellendichtung und Verfahren zum Betreiben einer ORC-Anlage
US8083469B1 (en) * 2009-03-20 2011-12-27 Florida Turbine Technologies, Inc. High temperature bearing with lubricant

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2016030847A1 *

Also Published As

Publication number Publication date
WO2016030847A1 (fr) 2016-03-03

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