EP1426565A1 - Groupe intégrée d'échangeurs de chaleur thermiques pour une turbine à vapeur avec un fluid organique - Google Patents

Groupe intégrée d'échangeurs de chaleur thermiques pour une turbine à vapeur avec un fluid organique Download PDF

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Publication number
EP1426565A1
EP1426565A1 EP03425722A EP03425722A EP1426565A1 EP 1426565 A1 EP1426565 A1 EP 1426565A1 EP 03425722 A EP03425722 A EP 03425722A EP 03425722 A EP03425722 A EP 03425722A EP 1426565 A1 EP1426565 A1 EP 1426565A1
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EP
European Patent Office
Prior art keywords
regenerator
container
condenser
housing
thermal exchange
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
EP03425722A
Other languages
German (de)
English (en)
Other versions
EP1426565B1 (fr
Inventor
Mario Gaia
Roberto Bini
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
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Turboden SpA
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Publication date
Application filed by Turboden SpA filed Critical Turboden SpA
Publication of EP1426565A1 publication Critical patent/EP1426565A1/fr
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Publication of EP1426565B1 publication Critical patent/EP1426565B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
    • F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours

Definitions

  • This invention concerns the organic fluid steam turbine section in general and refers in particular to two thermal exchange units integrated into an organic fluid turbo generator plant (ORC)
  • the steam on exiting the turbine is obliged to pass through two thermal exchange units represented by a so-called regenerator and followed by a condenser.
  • the regenerator usually requires a very large exchange surface in that the thermal exchange coefficients with a fluid in the steam phase are very low and the thermal capacity to exchange, for correct regeneration, is very high
  • regenerator consequently, is bulky and its overall size is further increased by the need to realise large sized input and output steam conducts. This, at least in applications where the volumetric deliveries of the steam are very high due to the low steam pressure, typical of turbo generators for cogeneration, fed by diathermic oil heated by biomass combustion and using silicone oil as a working fluid.
  • the condenser is also usually installed in a container under pressure and particular attention must be paid to the size of the input steam conducts arriving from the regenerator.
  • the condenser housing must be much larger than the exchange surfaces (e.g., the tube nest in a condenser) to allow sufficient room for the steam to flow so as not to generate excessive loss in load.
  • regenerator and condenser are installed in cylindrical housings suitable to resist the designed pressure, with a circular cross-section and development mainly along an axis.
  • the length of the system varies from 1 to 10 times the diameter of the housing, and the diameter of the latter is normally between 0.5 and 2.5 metres, with lengths therefore in the order of 2-10 metres.
  • one exchanger or regenerator 10 has a typical parallelepiped shape, with the long side parallel to the axis of a container or housing 11, for example placed horizontally so that the steam has to cross it from the top to the bottom (or from the bottom to the top).
  • the objective of this invention is on the other hand to provide an innovative integration solution of the two thermal exchange units, a regenerator and a condenser for the use in the above mentioned field, really reduced in overall size, thanks to a reduction of the internal unused volumes of the container or housing they are placed in, that is those volumes which are not strictly necessary to contain the exchanger masses.
  • a regenerator 21 and a condenser 22 are located in a single container or external housing 23 essentially cylindrical and on a horizontal axis and with a wall thickness suitable to contain the pressures involved.
  • container 23 has, at one end, an inlet passage 24 for the hot steam coming, in the direction of arrow E, from the organic fluid steam turbine - not shown - and, at the bottom part, an exit passage 25 of the condense liquid as needed.
  • the condenser 22 in which a cooling liquid circulates, is made up of a tube nest supported by a tube plate 26. According to Figs. 2-6, the condenser is positioned at the bottom end of container 23 lying under the regenerator 21, and facing parallel to it.
  • the tube plate 26 of condenser 22 has the same diameter as the container 23 and is attached to the same forming the head or bottom 23' of the part opposite to the one having the input passage 24 of the steam.
  • the condenser 22 does not require a cover or container, so the exchanger group becomes particularly simple even if the tube plate 26 has to be of a specific thickness.
  • the condenser 22 still maintain a partial shell, indicated by 22', which joins and integrates with the container or housing 23, extending from one head of the latter as shown in Fig.3.
  • the condenser may have a tube plate 26', with a diameter less than that of the housing and however not larger than is necessary so that it will fit on the portion of the shell 22' of the condenser.
  • a tube plate smaller in diameter obviously means a significant reduction in its thickness, always however compatible with the resistance to the pressure of the design, an increase in facility of its working capacity plus less weight and a lower cost.
  • the upper space 21' between the regenerator 21 and container 23 (as a cross-section, a circular sector) can house a fixed baffle 27 - Figs. 3 and 4 - as long as the regenerator itself and with a thickness less than that of the external container as the difference in pressure it has to support is little.
  • This intermediate baffle 27 is shaped with the objective of forming a conveyor 28 to correctly direct the steam entering the container 23 from the turbine to the regenerator 21.
  • the presence of the intermediate baffle 27, besides helping with directing the steam towards the regenerator, has the advantage of shielding and maintaining the external walls of the container colder, in that it is not directly in contact with the steam entering which is hotter. In addition it guarantees better uniformity of the temperatures of the wall of the housing, reducing in this way the possibility of warping due to dissymmetric heating.
  • the flow of hot steam is forced to flow crosswise through the regenerator from the top to the bottom. Therefore any liquid which might condense on the surface of the regenerator (for example, in the start up phase when the regenerator is cold) is easily expelled by the flow of steam moving in the same direction as the force of gravity and also collects in the hot well 25.
  • the liquid side of the regenerator as it is counter current, is traversed from bottom to top so any incondensable air or other gas is pushed away, giving the natural rise (from bottom to top) inside the mass of liquid the right of way.
  • the condenser 22 underneath is fed almost in a uniform fashion for all its length.
  • the lower part of the container is used to house the tube nest of the condenser, completely without the need for its own cover as in Fig. 2, or for most of it as in Fig.3, where the condenser maintains a portion of the shell 22' which may be shaped so as to collect and expel any incondensable gasses which may get into the circuit.
  • Another improvement in the thermal exchange conditions to the condenser can be achieved by equipping the latter, at least in the lower section, with side walls 29 as shown in Fig. 5. These walls have the aim of compelling the steam to pass inside the tube nest flowing mainly from top to bottom. This favours the downward collection of the liquid resulting from condensation and the downward discharge of any incondensable gas present. The incondensable gas accumulated at the bottom gradually moves towards the tube plate from where it will be extracted.
  • containing and guide side walls 29 for downward steam flow enables the flow of the cooling liquid, water or other vehicle, to come into contact with the different parts of the condensing tube nest in an orderly fashion compared with the steam flow.
  • regenerator 21 and condenser 22 are housed in a common container or housing 23, but this container is provided with walls 30 which set the passage of the steam, compelling it to cross first the regenerator and then the condenser in a fundamentally horizontal direction.
  • regenerator 21 and condenser 22 are housed in a common container or housing 23. But the condenser 22 is placed above the regenerator 21 with an opportune collection and discharge system 31 of the condense liquid placed between the two exchangers 21, 22.
  • the condense liquid is in this way at a higher level from the ground than from the cases of realisations where the condenser is placed below the regenerator.
  • NPSHa suction height available to the pump
  • the liquid which forms collects at the bottom of the housing and can be removed either by evaporation, thanks to a heater coil 32, or by means of an auxiliary pump 33. Also in this case a baffle 34 can be placed in the bottom internal part of the housing 23 so as to direct the steam from the entry E towards the regenerator.

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)
EP03425722A 2002-11-11 2003-11-06 Groupe intégré d'échangeurs de chaleur thermiques pour une turbine à vapeur avec un fluide organique Expired - Lifetime EP1426565B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBS20020102 ITBS20020102A1 (it) 2002-11-11 2002-11-11 Gruppo di scambio termico integrato per turbine a vapore di fluido
ITBS20020102 2002-11-11

Publications (2)

Publication Number Publication Date
EP1426565A1 true EP1426565A1 (fr) 2004-06-09
EP1426565B1 EP1426565B1 (fr) 2013-03-27

Family

ID=32310133

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03425722A Expired - Lifetime EP1426565B1 (fr) 2002-11-11 2003-11-06 Groupe intégré d'échangeurs de chaleur thermiques pour une turbine à vapeur avec un fluide organique

Country Status (2)

Country Link
EP (1) EP1426565B1 (fr)
IT (1) ITBS20020102A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202008010988U1 (de) 2008-08-18 2008-12-24 Eckert, Frank Wärmetauschersystem für Rankine-Prozesse
DE102008038241A1 (de) 2008-08-18 2010-02-25 Eckert, Frank Wärmetauschersystem für Rankine-Prozesse
WO2013150018A2 (fr) 2012-04-03 2013-10-10 Equitherm S.À R.L. Dispositif de génération de puissance en fonction d'un cycle de rankine
US11098934B2 (en) 2018-01-16 2021-08-24 Carrier Corporation Guiding panel for condenser, condenser and refrigeration system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024084359A1 (fr) * 2022-10-19 2024-04-25 Turboden S.p.A. Récupérateur à collecteurs externes pour installations à cycle organique de rankine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4067189A (en) * 1974-12-16 1978-01-10 The Hydragon Corporation Multicycle turbine engine
US4185465A (en) * 1976-01-29 1980-01-29 Dunham-Bush, Inc. Multi-step regenerated organic fluid helical screw expander hermetic induction generator system
DE19907512A1 (de) * 1999-02-22 2000-08-31 Frank Eckert Vorrichtung zur Energieumwandlung auf der Basis von thermischen ORC-Kreisprozessen
DE10052414A1 (de) * 2000-10-23 2002-05-08 Frank Eckert Verfahren zum Betreiben einer Energieumwandlungseinrichtung sowie Vorrichtung zur Durchführung eines solchen Verfahrens

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4067189A (en) * 1974-12-16 1978-01-10 The Hydragon Corporation Multicycle turbine engine
US4185465A (en) * 1976-01-29 1980-01-29 Dunham-Bush, Inc. Multi-step regenerated organic fluid helical screw expander hermetic induction generator system
DE19907512A1 (de) * 1999-02-22 2000-08-31 Frank Eckert Vorrichtung zur Energieumwandlung auf der Basis von thermischen ORC-Kreisprozessen
DE10052414A1 (de) * 2000-10-23 2002-05-08 Frank Eckert Verfahren zum Betreiben einer Energieumwandlungseinrichtung sowie Vorrichtung zur Durchführung eines solchen Verfahrens

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202008010988U1 (de) 2008-08-18 2008-12-24 Eckert, Frank Wärmetauschersystem für Rankine-Prozesse
DE102008038241A1 (de) 2008-08-18 2010-02-25 Eckert, Frank Wärmetauschersystem für Rankine-Prozesse
WO2013150018A2 (fr) 2012-04-03 2013-10-10 Equitherm S.À R.L. Dispositif de génération de puissance en fonction d'un cycle de rankine
US11098934B2 (en) 2018-01-16 2021-08-24 Carrier Corporation Guiding panel for condenser, condenser and refrigeration system
US11821665B2 (en) 2018-01-16 2023-11-21 Carrier Corporation Guiding panel for condenser, condenser and refrigeration system

Also Published As

Publication number Publication date
EP1426565B1 (fr) 2013-03-27
ITBS20020102A1 (it) 2004-05-12

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