EP3060767B1 - Vorrichtung und verfahren für einen orc-kreisprozess mit mehrstufiger expansion - Google Patents

Vorrichtung und verfahren für einen orc-kreisprozess mit mehrstufiger expansion Download PDF

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Publication number
EP3060767B1
EP3060767B1 EP15700344.3A EP15700344A EP3060767B1 EP 3060767 B1 EP3060767 B1 EP 3060767B1 EP 15700344 A EP15700344 A EP 15700344A EP 3060767 B1 EP3060767 B1 EP 3060767B1
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EP
European Patent Office
Prior art keywords
recuperator
turbine
working medium
heat
downstream
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.)
Active
Application number
EP15700344.3A
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German (de)
English (en)
French (fr)
Other versions
EP3060767A1 (de
Inventor
Hannes Fogt
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.)
Siemens Energy Global GmbH and Co KG
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Siemens Energy Global GmbH and Co KG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/02—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of multiple-expansion type
    • F01K7/025—Consecutive expansion in a turbine or a positive displacement engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type

Definitions

  • the invention relates to a method for carrying out a thermal cycle process based on the principle of the Organic Rankine Cycle for converting energy from a heat source into mechanical energy, in which a working medium circulates in a circuit and the circuit has an evaporator for evaporating the working medium, a downstream turbine, a downstream condenser, a downstream feed pump and a return to the evaporator.
  • Organic Rankine Cycle Plants for running a thermal cycle according to the principle of the Organic Rankine Cycle (ORC plants) of the type mentioned above are known in principle.
  • the Organic Rankine Cycle is a process for operating steam turbines with a working fluid/working medium other than steam.
  • ORC systems are typically fed using heat transfer media (in particular thermal oil), heat being supplied to an ORC working medium for the ORC cycle process via the heat transfer medium, as a result of which it is heated and ultimately evaporated.
  • the vaporized working medium is expanded in a known manner in a turbine, condensed, conveyed to the vaporizer and vaporized again.
  • Such a device for performing a thermal cycle is, for example, in WO 2013/171685 A disclosed.
  • the DE 10 2007 009503 A1 discloses an apparatus comprising a turbine having a plurality of turbine stages, wherein at least two turbine stages each have a first and a second recuperator downstream. The working fluid is reheated by means of the first recuperator and then fed to the downstream turbine stage.
  • the object of the invention is therefore to specify an improved method for an ORC cycle process.
  • the use of comparatively small heat exchangers or recuperators and thus a reduction in the costs of an ORC system or its increase in performance should be made possible with simple transport of the system components.
  • the object of the invention is achieved by the method of claim 1, wherein heat is extracted from the working medium in the first and in the second recuperator.
  • One embodiment of the invention provides that the heat in the first and in the second recuperator is withdrawn while the pressure remains the same.
  • the first turbine/turbine stage has a first flow of the first recuperator downstream in the circuit of the working medium and a second flow of the named recuperator, which is thermally coupled to the first flow, is downstream of the feed pump. In this way, the energy recovered in the first recuperator can be used to reheat the condensed working medium.
  • the second turbine/turbine stage has a first flow of the second recuperator downstream in the circuit of the working medium and a second flow of the named recuperator, which is thermally coupled to the first flow, is downstream of the feed pump. In this way, the energy recovered in the second recuperator can also be used to reheat the condensed working fluid.
  • first throughflow of the second recuperator is downstream of the first throughflow of the first recuperator in the working fluid circuit and that the second throughflow of the second recuperator is upstream of the second throughflow of the first recuperator in the working fluid circuit. This achieves a particularly high temperature increase in the condensed working medium.
  • first turbine/turbine stage and the second turbine/turbine stage are arranged on a common shaft. This results in a comparatively simple mechanical construction and the possibility of using a single generator.
  • the invention is not tied to the use of a generator, but the energy generated by the turbines can also be used directly mechanically or converted into another form of energy.
  • first turbine/turbine stage and the second turbine/turbine stage are arranged on different shafts.
  • the turbines/turbine stages can be adapted particularly well to the cyclic process, since the turbines/turbine stages can run at different speeds.
  • the waves are coupled to one another, for example via a Transmission.
  • the turbines/turbine stages can run at different speeds, but it is possible to provide only a single output shaft and consequently only a single generator.
  • the energy generated by the turbines can be used directly mechanically or converted into another form of energy.
  • the device 1 shows a schematic block diagram of a device 1 for performing a thermal cycle process according to the principle of the Organic Rankine Cycle for converting energy from a heat source into mechanical energy, in which an organic working medium circulates in a circuit.
  • the device 1 comprises an evaporator 2 for evaporating the working medium, a first downstream turbine 3, a first downstream recuperator 4, a second downstream turbine 5, a second downstream recuperator 6, a heat exchanger 7, a condenser 8, a feed pump 9, and a return to the evaporator 2.
  • the 1 a generator 10 coupled to the turbines 3, 5 and a motor 11 coupled to the feed pump 9 for driving the same.
  • the first turbine 3 is provided with a first throughput of the first recuperator 4 (namely the one in 1 vertical flow) in the circuit of the working medium downstream downstream. Furthermore, a second flow of the named recuperator 4 (namely the one in 1 horizontal flow) which is thermally coupled to the first flow downstream of the feed pump 9 .
  • a first flow of the second recuperator 6 downstream in the circuit of the working fluid and a second flow of said recuperator 6, thermally coupled to the first flow, is downstream of the feed pump 9.
  • the energy recovered in the recuperators 4, 6 can be used in the ORC circuit. In principle, however, it would of course also be conceivable to use the energy obtained in the recuperators 4, 6 outside of the ORC circuit.
  • the first flow of the second recuperator 6 is downstream of the first flow of the first recuperator 4 in the working fluid circuit, and the second flow of the second recuperator 6 is upstream of the second flow of the first recuperator 4 in the working fluid circuit.
  • the condensed working medium can be preheated to a comparatively high temperature in front of the evaporator 2 with the aid of the recuperators 4 , 6 .
  • the first and the second turbine 3, 5 are arranged on a common shaft and are connected to the generator 10 via this shaft, as a result of which the mechanical energy obtained in the turbines 3, 5 can be converted into electrical energy.
  • this is by no means the only possibility. It would also be conceivable for the first and the second turbine 3, 5 to be arranged on different shafts.
  • one generator 10 is driven by one turbine 3, 5 each. But it is also conceivable that the waves are coupled to each other, for example via a Transmission. As a result, the turbines 3, 5 can run at different speeds, but it is possible to provide only a single output shaft and consequently only a single generator 10.
  • the use of the generator 10 is not mandatory, but the mechanical energy generated via the turbines 3, 5 can also be used directly mechanically or converted into another form of energy.
  • pumping stations, compressors or even ship propulsion systems would be conceivable.
  • the working medium in the first turbine 3 is expanded to the second process point Z2, as a result of which the pressure p and the temperature T decrease and the entropy S increases. If the pressure p remains the same, heat is extracted from the working medium in the first recuperator 4 .
  • the cyclic process therefore runs along an isobar from the process point Z2 to the process point Z3.
  • the working medium expands further after the process point Z4. With the pressure remaining the same, heat is again withdrawn from the working medium in the second recuperator 6 .
  • the cyclic process therefore runs along an isobar from the process point Z4 to the process point Z5. In the heat exchanger 7, there is further cooling down to the process point Z6 and finally the working medium is condensed in the condenser 8. With the temperature T remaining the same, the entropy decreases to the process point Z7.
  • the condensed working medium is fed into the second recuperator 6 with the aid of the feed pump 9 (process point Z8) and heated there up to the process point Z9. Subsequently, the working medium in the first recuperator 4 is heated from the process point Z9 to the process point Z10. This is followed by further heating and finally evaporation of the working medium in the evaporator 2, which closes the cycle by returning to the process point Z1.
  • the temperature T9 i.e. the outlet temperature at the second flow of the second recuperator 6
  • the temperature T5 i.e. the outlet temperature at the first flow of the second recuperator 6
  • the temperature T10 i.e. the outlet temperature at the second Flow of the first recuperator 4 in turn is less than the temperature T3 (ie the outlet temperature at the first flow of the first recuperator 4).
  • the area q45 lying under the line connecting the process points Z4 and Z5 is equal to the area q89 lying under the line connecting the process points Z8 and Z9.
  • the areas q45 and q89 indicate the amount of heat transferred in the second recuperator 6 .
  • the area q23 lying under the line connecting the process points Z2 and Z3 is equal to the area q910 lying under the line connecting the process points Z9 and Z10.
  • the areas q23 and q910 indicate the amount of heat transferred in the first recuperator 4 .
  • the area q56 lying under the line connecting the process points Z5 and Z6 also indicates the energy removed in the heat exchanger 7 before the condensation of the working medium.
  • the area q67 below the connecting line of the process points Z6 and Z7 also indicates the energy dissipated in the condenser 8 and the area q101 below the connecting line of the process points Z10 and Z1 finally indicates the energy supplied in the evaporator 2.
  • ORC device may also include more or fewer components than illustrated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
EP15700344.3A 2014-02-20 2015-01-08 Vorrichtung und verfahren für einen orc-kreisprozess mit mehrstufiger expansion Active EP3060767B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014203121.4A DE102014203121B4 (de) 2014-02-20 2014-02-20 Vorrichtung und Verfahren für einen ORC-Kreisprozess mit mehrstufiger Expansion
PCT/EP2015/050196 WO2015124325A1 (de) 2014-02-20 2015-01-08 Vorrichtung und verfahren für einen orc-kreisprozess mit mehrstufiger expansion

Publications (2)

Publication Number Publication Date
EP3060767A1 EP3060767A1 (de) 2016-08-31
EP3060767B1 true EP3060767B1 (de) 2022-06-29

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EP15700344.3A Active EP3060767B1 (de) 2014-02-20 2015-01-08 Vorrichtung und verfahren für einen orc-kreisprozess mit mehrstufiger expansion

Country Status (4)

Country Link
EP (1) EP3060767B1 (pl)
DE (1) DE102014203121B4 (pl)
PL (1) PL3060767T3 (pl)
WO (1) WO2015124325A1 (pl)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201900004733A1 (it) * 2019-03-29 2020-09-29 Saipem Spa Ciclo transcritico re-compresso con post-espansione in applicazioni criogeniche o a basse temperature, e/o con fluidi refrigeranti
EP4403751A1 (fr) * 2023-01-20 2024-07-24 Wise Open Foundation Système et procédé de génération d'énergie

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007009503A1 (de) * 2007-02-25 2008-09-18 Deutsche Energie Holding Gmbh Mehrstufiger ORC-Kreislauf mit Zwischenenthitzung

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
US5572871A (en) * 1994-07-29 1996-11-12 Exergy, Inc. System and apparatus for conversion of thermal energy into mechanical and electrical power
US20060112693A1 (en) * 2004-11-30 2006-06-01 Sundel Timothy N Method and apparatus for power generation using waste heat
US8438849B2 (en) 2007-04-17 2013-05-14 Ormat Technologies, Inc. Multi-level organic rankine cycle power system
DE202007012871U1 (de) 2007-09-14 2007-11-15 Gesellschaft für Motoren und Kraftanlagen GmbH Vorrichtung zur Energieumwandlung
US20100319346A1 (en) * 2009-06-23 2010-12-23 General Electric Company System for recovering waste heat
US8752381B2 (en) 2010-04-22 2014-06-17 Ormat Technologies Inc. Organic motive fluid based waste heat recovery system
WO2012159194A1 (en) * 2011-05-24 2012-11-29 Her Majesty The Queen In Right Of Canada As Represented By The Minister Of Natural Resources High pressure oxy-fuel combustion system (hiprox) bottoming cycle
US8495878B1 (en) * 2012-04-09 2013-07-30 Eif Nte Hybrid Intellectual Property Holding Company, Llc Feedwater heating hybrid power generation
ITMI20120852A1 (it) * 2012-05-17 2013-11-18 Exergy Orc S R L Sistema orc per la produzione di energia tramite ciclo rankine organico
US9284857B2 (en) 2012-06-26 2016-03-15 The Regents Of The University Of California Organic flash cycles for efficient power production

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007009503A1 (de) * 2007-02-25 2008-09-18 Deutsche Energie Holding Gmbh Mehrstufiger ORC-Kreislauf mit Zwischenenthitzung

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Publication number Publication date
DE102014203121A1 (de) 2015-08-20
EP3060767A1 (de) 2016-08-31
WO2015124325A1 (de) 2015-08-27
PL3060767T3 (pl) 2022-10-17
DE102014203121B4 (de) 2017-03-02

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