EP3283735A1 - Procédé pour ralentir le refroidissement d'une unité de guidage d'écoulement et unité de guidage d'écoulement - Google Patents

Procédé pour ralentir le refroidissement d'une unité de guidage d'écoulement et unité de guidage d'écoulement

Info

Publication number
EP3283735A1
EP3283735A1 EP16721368.5A EP16721368A EP3283735A1 EP 3283735 A1 EP3283735 A1 EP 3283735A1 EP 16721368 A EP16721368 A EP 16721368A EP 3283735 A1 EP3283735 A1 EP 3283735A1
Authority
EP
European Patent Office
Prior art keywords
phase change
wall
unit
change material
flow guide
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Withdrawn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
EP16721368.5A
Other languages
German (de)
English (en)
Inventor
Stefan Becker
Herbert FAHRNBAUER
Stephan Ippisch
Uwe Juretzek
Matthias Migl
Alexander Tremel
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 AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP3283735A1 publication Critical patent/EP3283735A1/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Withdrawn legal-status Critical Current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
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
    • F01K27/02—Plants modified to use their waste heat, other than that of exhaust, e.g. engine-friction heat
    • 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
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/08—Cooling; Heating; Heat-insulation
    • 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
    • F01K13/00—General layout or general methods of operation of complete plants
    • F01K13/006—Auxiliaries or details not otherwise provided for
    • 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
    • F01K13/00—General layout or general methods of operation of complete plants
    • F01K13/02—Controlling, e.g. stopping or starting
    • 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
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
    • F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]

Definitions

  • the invention relates to a method for slowing down a cooling of a flow guide unit. Moreover, the invention relates to a flow guide unit.
  • flow guide units which are flowed through by a hot heat transfer medium. If, during the course of operation of such a system, the cooling conditions of the heat transfer medium change as a result of changed process conditions, the flow guide units also cool. In order to slow cooling of the flow guide units and thereby to reduce thermal energy losses of the Appendices ⁇ ge, so far include known flow guide ⁇ units thermal insulation with a low thermal conductivity and a low heat transfer coefficient.
  • This object is inventively achieved by a method for slowing a cooling of a flow guide unit, wherein the flow guide unit comprises a Warmhalteein ⁇ standardized and is flowed through by a heat carrier medium, a temperature of the heat transfer medium is reduced, whereby a wall of the flow guide unit waste cools, and the holding unit emits thermal energy, whereby a cooling of the wall is slowed down.
  • the slowing down of a cooling down can be understood in this context as a slowing down of a temperature decrease. That is, when cooling of the flow guide unit is slowed down, its temperature loss rate or its cooling rate expediently decreases.
  • the holding unit can deliver thermal energy directly or indirectly to the wall. This can counteract a cooling of the wall. As a result, the cooling of the wall can be slowed down. Such a system can be operated more energy- ⁇ cient.
  • the warming unit comprises a heating device.
  • the heater can give off thermal energy, in particular to the wall.
  • the heating device can emit the thermal energy directly or indirectly to the wall.
  • the heating device may be, for example, an electrical heating device, in particular a resistive heater.
  • a temperature of the wall is maintained at or above a predetermined temperature threshold value, in particular at or above 400 ° C., by means of the heating device.
  • the warming unit comprises a phase change material.
  • the phase change material may undergo a phase change from a first phase to a second phase.
  • the phase change material can give thermi ⁇ cal energy during phase change. As a result, a cooling of the wall can be slowed down.
  • phase transition a phase change
  • the thermal mass or the thermal inertia of the flow guide element can be increased. As a result, a temperature maintenance can be improved.
  • the heat transfer medium may be a vapor or a liquid.
  • the saucerme ⁇ dium steam is preferably used.
  • the output from the phase change material in the phase change ⁇ thermal energy is applied to the wall istge ⁇ ben.
  • the wall in turn can pass on the thermal energy to the heat transfer medium.
  • the thermal energy released by the phase change material during the phase change can be delivered to the heat transfer medium.
  • the heat transfer medium in turn can pass on the thermal energy to the wall.
  • the cooling of the heat transfer medium is slowed due to the phase change in the high ⁇ phase change material.
  • the first phase is a liquid phase.
  • the second phase is a solid phase.
  • the total phase Wech ⁇ selmaterial or a portion of the phase change material can solidify in the cooling of the heat transfer medium.
  • the phase change from the liquid phase into the solid phase expediently takes place in the region of a solidification temperature of the phase change material.
  • Wech Selma ⁇ TERIAL are expediently thermal energy in the form of
  • phase change material can undergo a phase change from the first phase to the second phase, it must expediently first brought into the first phase of the ⁇ .
  • the phase change material of the second phase brought into the first phase, in particular on ⁇ melted by being heated.
  • phase change than the phase change from a liquid phase to a solid phase ge ⁇ uses can be.
  • the first phase can be a solid phase.
  • the second phase may be another solid phase.
  • a phase change from one solid phase to another solid phase may, for example, be characterized by a change in a crystal structure of the phase change material.
  • the entire phase change material or a part of the phase change material can change the crystal structure during the cooling of the heat transfer medium ⁇ .
  • phase change material can thus be regarded as ⁇ Were me Grande, especially as latent heat storage.
  • phase change material has a ge ⁇ ringere thermal conductivity than the wall. This allows the phase change material, the wall thermally isolie ⁇ ren. However, the thermal conductivity of the phase change materials preferably so high that a sufficiently large heat flow is ge ⁇ ensured by the phase change material to the wall.
  • the PHA sen grillmaterial is supplied by a heater thermal energy, especially when a temperature of the Pha sen grillmaterials a predetermined minimum temperature below.
  • the latter heating device may be re insbesonde the aforementioned heater.
  • the phase change material can be heated directly or indirectly by the heater. In particular, by the Heating the wall to be heated, which can forward the thermal energy to the phase change material.
  • the method can be used when operating a power plant, in particular a thermal power plant. For example, a cooling of a flow guide unit of the motor ⁇ drive according to the method described above can slow down the advertising.
  • the Strömungs exchangesein ⁇ ness of the power plant is the aforementioned Strömungs Exein ⁇ ness.
  • the temperature of the bathown- around which flows through the flow guide unit, infol ge ⁇ a reduction in a performance of the power plant is reduced.
  • the power of the power plant can be reduced, for example, by a supply of fuel into a combustion chamber of the
  • Power plant is reduced. Furthermore, the temperature of the heat transfer medium can be reduced in particular by the power plant is shut down. When shutting down the power plant, the flow guide unit can cool down. Further, it may be necessary to heat the flow guide unit in the (re) starting of the motor ⁇ plant initially over a temperature threshold before a steam turbine of the power plant can be put into operation and the power plant can inject energy into a power grid.
  • the faster startup the power plant can be operated more efficiently.
  • thermo-mechanical stresses on the flow guide unit can be reduced by lower temperature fluctuations due to the slow cooling. Consequently, the power plant can be operated material-friendly due to the reduction of thermo-mechanical loads.
  • the life of the flow guide units can be increased.
  • the power plant can be operated wear and thus low maintenance.
  • the efficiency of the power plant can be improved by the use of the holding unit. Overall, the power plant can be operated more economically.
  • the invention relates to a flow guide unit.
  • the flow control unit according to the invention comprises a wall and a holding unit, wel ⁇ che is adapted to slow cooling of the wall to deliver thermal energy.
  • the flow guiding unit may in particular be the flow guiding unit used in the method described above.
  • the heat retention unit comprises a phase change material.
  • the phase change material can be incorporated to ⁇ directed to traverse to slow cooling of the wall of a phase change from a first phase to a second phase.
  • the phase change material al be adapted to emit thermal energy during the phase change.
  • the heat retention unit may comprise a heating device.
  • the heating device can be configured to emit thermal energy, in particular to the wall.
  • the heater may e.g. be used to keep the wall at or above a predetermined temperature threshold, in particular at or above 400 ° C.
  • the flow guide unit includes a ther ⁇ mix insulation.
  • the flow guidance unit comprises a heating device, in particular an electric heating device.
  • the heater may be, for example, the aforementioned heater.
  • the heating device can be arranged, for example, between the wall and the thermal insulation.
  • the thermal insulation expediently surrounds the wall.
  • the thermal insulation advantageously surrounds the phase change material.
  • the thermal Iso ⁇ -regulation may surround the heater.
  • the warming unit advantageously comprises at least egg ⁇ NEN cavity.
  • This cavity may for example be arranged between the wall and the thermal insulation.
  • the phase change material is placed in the cavity.
  • the flow guide unit in addition to the first-mentioned wall on another wall.
  • the further wall surrounds the first-mentioned wall.
  • the flow guide unit can therefore be designed double-walled.
  • the réellege ⁇ called wall may be an inner wall and the other Wan ⁇ tion may be an outer wall.
  • the heat retention unit may comprise at least one cavity which is arranged between the first-mentioned and the further wall.
  • the cavity may be defined, for example, by the former wall. and the further wall limits.
  • the phase change material is placed in the cavity.
  • the phase change material can be considered macro-encapsulated.
  • wall limits an interior of the flow guide unit.
  • the interior of the flow guide unit can be considered that space through which the heat transfer medium is guided. It makes sense that the interior is laterally bounded by the first ⁇ called wall.
  • the holding unit has a plurality of cavities.
  • the plurality of cavities may, for example, be arranged in a sponge-like structure, in particular in a porous metal or a carbon sponge.
  • the phase change material may be placed in the cavities of the spongy structure.
  • the sponge-like structure with the phase change material can be considered as composite material ⁇ .
  • the heat retention unit may comprise a dispersion of metallic microparticles, carbon particles and / or ceramic particles with the phase change material.
  • the holding unit comprises a plurality of capsules.
  • the phase change material in the chapter ⁇ clauses can be placed, in particular included in the capsules be.
  • the capsules can be considered as phase change material bulk material.
  • the capsules can be arranged for example in an interior of the flow guide unit. The interior may be in particular the aforementioned interior.
  • the phase change material preferably comprises a metal alloy and / or a salt mixture.
  • a metal alloy comprises aluminum, magnesium and zinc. sen.
  • a salt mixture may include, for example, sodium chloride, magnesium chloride, sodium fluoride, potassium fluoride and / or lithium fluoride.
  • the phase change temperature of the phase change material is greater than 300 ° C, in particular greater than 400 ° C.
  • the phase change temperature of the phase change material is expediently less than 800 ° C, in particular less than 600 ° C.
  • the phase change temperature can be understood to be the temperature at which the phase change takes place.
  • the phase change can preferably take place when the Tempe ⁇ temperature of the phase change material has a predetermined temperature value and / or when the temperature of the phase change material is in a predetermined temperature interval.
  • the predetermined temperature value and the predetermined temperature ⁇ turintervall may be dependent on the chemical composition of the phase change material.
  • the phase change temperature is usefully the solidification temperature.
  • the wall has a plurality of ribs.
  • the ribs may have the purpose of improving heat transfer from the holding unit, in particular from the phase change material, into the wall and / or from the wall into the holding unit, in particular into the phase change material. Specifically, the heat transfer is improved by increasing the contact area between the wall and the holding ⁇ unit, the larger contact area can be attributed to the ribs.
  • the wall may have a plurality of ribs on its side facing away from the holding unit. The side facing away from the holding unit is expediently facing the interior of the flow guiding unit.
  • the latter Ribs may have the purpose of improving the heat transfer from the heat transfer medium into the wall and / or from the wall into the heat transfer medium.
  • the heat transfer is improved by a larger contact surface between the wall and the heat transfer medium, wherein the larger contact surface can be attributed to the ribs.
  • the standardized Strömungs exchangesein- invention in particular one of its above-described wide-Erbil ⁇ compounds, an element of a power plant, in particular of a thermal power plant, his.
  • the flow guidance unit is a pipeline, a steam collector, a steam turbine or a heat exchanger, in particular a heat exchanger of a steam generator.
  • the power plant comprises a plurality of flow guide units of the type described above.
  • One of the flow guide units may be a pipeline.
  • Another of the flow guide units may be a vapor collector.
  • Yet another of the Strömungs exchangeseinhei ⁇ th can be a heat exchanger.
  • Another of the flow guiding units may be a steam turbine.
  • FIG. 2 shows a cross section of one of the flow guide units, which comprises a phase change material arranged between a wall and a thermal insulation of the flow guide unit;
  • FIG. 4 shows a longitudinal section of an alternative flow guide unit, which an outer and an inner Wan ⁇ tion and a between the outer and the inner Wall arranged phase change material comprises; and a longitudinal section of a further alternative flow guide unit, in the interior of which capsules with a phase change material are placed.
  • the 1 shows schematically a thermal power plant 2, which is designed as a gas-and-steam power plant.
  • the power plant 2 has a steam generator 4, a steam collector 6 and a steam turbine 8. Furthermore, the power plant 2 has a pipe 10 which connects the steam generator 4 and the steam turbine 8 with each other.
  • the steam generator 4 comprises a heat exchanger 12. Furthermore, the power plant 2 comprises a fuel preheater 14 with a fuel feed.
  • the power plant 2 further comprises a generator 18 which is connected via a shaft 20 to the steam turbine 8.
  • the shaft has a coupling 22 between the generator 18 and the steam turbine 8.
  • a gas turbine 24 is rigidly connected via the shaft 20 to the generator 18.
  • the burn stoffvorierr 14 is the input side of the gas turbine 24 arranged ⁇ .
  • a combustion chamber 26 is further arranged.
  • the gas turbine 24 is connected on the output side via an exhaust pipe 28 to the steam generator 4.
  • the power plant 2 also comprises a condenser 30 and a return line 32, which connects the condenser 30 to the steam generator 4 and has a condensate pump.
  • a fuel in particular natural gas, is introduced into the fuel preheater 14 via the fuel feed and preheated in the fuel preheater 14. Subsequently, the preheated
  • the heat transfer medium i.e., the water vapor
  • the heat transfer medium is collected in the vapor collector 12, which is connected downstream of the steam generator 4. Via the pipe 10, the heat transfer medium is passed into the steam turbine 8.
  • the heat transfer medium which is guided through the steam turbine 8, drives the steam turbine 8 and thereby relaxes while performing mechanical work.
  • the gas turbine 24 and the steam turbine 8 drive (with coupled coupling 22) via the shaft 20 to the generator 18, which generates electrical energy.
  • the expanded heat transfer medium is condensed out in the condenser 30 downstream of the steam turbine 8, and the resulting (liquid) process water is supplied via the return line 32 to the steam generator 4.
  • the process water can be reheated and the process described above is repeated in a cycle.
  • Heat exchanger 12 and the fuel or Anlagenr 14 are identical to Heat exchanger 12 and the fuel or Anlagenr 14.
  • the flow guidance units 16 each comprise a heat retention unit 36 with a phase change material 38 (see FIG. 2 et seq.) Which is in liquid form during operation of the power plant 2. Falls below a temperature of the Phasen promptma- terials 38 during cooling of the heat carrier medium a given temperature before ⁇ , solidifies the phase change material 38. In the present embodiment, the predetermined temperature is 500 ° C.
  • the phase change material ⁇ are 38 thermal energy to a wall 40 (see FIG. 2 et seq.) Of the respective flow control unit 16 from.
  • thermal energy to the contained in the jeweili ⁇ gen flow guide unit 16 heat transfer medium is delivered. As a result, the further cooling of the wall 40 and the heat transfer medium is slowed down.
  • the flow guide units 16 When restarting the power plant 2, in particular within 24 to 48 hours after shutdown, the flow guide units 16 have a significantly higher temperature than a flow-guiding element without Phasenwech ⁇ selmaterial, so that a heating phase, within which a temperature threshold is reached, significantly shorter ⁇ falls. As a result, the power plant 2 can be operated more economically. In addition, thermomechanical loads on the flow- guiding units 16 are reduced by a lower temperature fluctuation due to a lower cooling, so that the power plant 2 is operated more gently, which also benefits the economy and Effi ⁇ ciency of the power plant 2.
  • FIG. 2 shows by way of example a simplified cross section of one of the aforementioned flow guiding units 16.
  • the illustrated flow guide unit 16 comprises a wall 40, a thermal insulation 42, which surrounds the wall 40, an inner space 44, through which the heat transfer medium to be performed, and a warming unit 36.
  • the warming ⁇ unit 36 in turn comprises a cavity 46, which is located 40 and the thermal insulation 42 between the wall and contains a phase change material 38th
  • the heat retention unit 36 includes an electric heater 48 disposed between the phase change material 38 and the thermal insulation 42.
  • phase change material 38 undergoes a phase change, also called phase transition, from a liquid phase to a solid phase, wherein the phase change takes place in the range of a solidification temperature of the phase change material 38.
  • phase change mate rial ⁇ 38 are in phase change (solidification) thermal Ener ⁇ energy, in particular in the form of melting enthalpy to which Wan ⁇ dung from 40, thus cooling the wall is slowed 40th
  • the wall in turn gives the thermal energy to the heat transfer medium. This in turn slows down the cooling of the heat transfer medium.
  • phase change material 38 When (re) starting the power plant 2, the phase change material 38 is brought from the solid phase to the liquid phase. In this case, the phase change material 38 absorbs thermal energy in the form of melt enthalpy in a narrow temperature range.
  • phase change than the phase change from the liquid phase into the solid phase, insbeson ⁇ particular a phase change from a solid phase into another solid phase can be (solid-solid phase change) used.
  • the phase change material 38 may include, for example, a metal alloy or a salt mixture.
  • a phase change material 38 may be a metal alloy of aluminum, magnesium and zinc, in particular with an aluminum content of 59%, a magnesium content of 35% and a zinc part ⁇ 6 "6 ⁇
  • the phase change material 38 may be, for example, a salt mixture of sodium chloride and Mag ⁇ nesiumchlorid, especially with a
  • phase change material 38 may be another salt mixture, for example, sodium fluoride, potassium fluoride and lithium fluoride, in particular with a Natriumfluo- ridanteil of 12%, a potassium fluoride content of 59% and egg ⁇ nem lithium fluoride content of 29%.
  • phase change material 38 If a temperature of the phase change material 38 falls below a predetermined minimum temperature of, for example, 450 ° C., thermal energy is supplied to the phase change material 38 by the electric heating device 48. In this case, the phase change material 38 is heated directly by the Schuein ⁇ direction 48. The phase change material 38 transfers the thermal energy to the wall 40. As a result, the wall 40 is held above a predetermined temperature threshold, in particular above 400 ° C., so that when starting a waiting time for warming up the flow guidance unit 16, in particular the wall 40, is shortened beyond the temperature threshold value .
  • a predetermined minimum temperature for example, 450 ° C.
  • FIG. 2 shows a sectional plane III-III in the form of a dashed line.
  • FIG. 3 shows a longitudinal section of the flow guiding unit 16 from FIG. 2 along the sectional plane III-III. This figure shows no additional features. Rather, it shows the flow guide unit 16 for a better understanding half from a different perspective.
  • the following Darge ⁇ presented alternative flow guidance units 16 are shown from the same perspective.
  • Figure 4 shows a longitudinal section of an alternative ausgestalte ⁇ th flow guide unit 16.
  • the following descrip ⁇ descriptions of Figures 4 and 5 are essentially limited to the differences from the embodiment of Figure 2, on the reference is made to the same features and functions. Essentially identical elements are generally designated by the same reference numerals, and features not mentioned are taken over into the following exemplary embodiments without being described again.
  • the flow guide unit 16 shown in FIG. 4 has an inner wall 50 and an outer wall 52.
  • the cavity 46, in which the phase change material 38 is placed is arranged between the inner wall 50 and the outer wall 52.
  • the inner wall 50 has on its phase change mate rial 38 ⁇ side facing a plurality of ribs 54th
  • the purpose of the ribs 54 is to improve heat transfer from the phase change material 38 to the wall 50 and / or from the wall 50 to the phase change material 38. In particular, the heat transfer through a larger contact area Zvi ⁇ rule the phase change material 38 and the inner wall 50 is improved.
  • the inner wall 50 on its side facing away from the phase change material 38 has a plurality of ribs 54.
  • the side of the inner wall facing away from the phase change material 38 faces the inner space 44, which guides the heat transfer medium.
  • the latter ribs 54 also have the purpose of improving a heat transfer from the heat transfer medium to the wall 50 and from the wall 50 to the heat transfer medium.
  • the neutrographer- gear is improved by increasing the contact area between the sauträ ⁇ germedium and the inner wall 50th
  • the ribs 54 of the inner wall 50 are optional. In principle, the ribs 54 may be omitted on the phase change material 38 facing and / or on the phase change material 38 from ⁇ facing side.
  • the ribs 54 can also be used in a single-walled flow guide unit 16 (according to FIG. 2 and FIG. 3) on the phase change material 38 facing and / or on the phase change material 38 facing away from the wall 40 may be present.
  • the heater 48 is disposed between the outer wall 52 and the thermal insulation 42. Falls below a temperature of the Phasen promptmateri- than 38 a predetermined minimum temperature, then the Pha ⁇ sen grillmaterial 38 supplied by the electric heater 48 thermal energy. Here, the phase Wech ⁇ selmaterial is indirectly heated.
  • the heating device 48 heats the outer wall 52 of the flow guide unit 16. The thermal energy which is thereby removed from the outer wall 52 on ⁇ is passed to the phase change material 38 and from the latter to the inner wall of the 50th
  • phase Wech ⁇ selmaterial 38 shows a longitudinal section of a further alternative design flow guide unit 16 having a phase Wech ⁇ selmaterial 38.
  • the phase Wech Selma ⁇ TERIAL 38 is not between the wall 40 and the thermal insulation 42, but included in a plurality of capsules 56, the interior 44 Flow guide unit 16 are placed. That is to say, in this case, the heat retention unit 36 includes the capsules 56 with the phase change material 38 next to the heating device 48.
  • the phase change material 38 emits at the phase change, the special ⁇ during solidification, thermal energy to the varnishträ ⁇ germedium.
  • the heat transfer medium in turn gives the thermal energy to the wall 40 on.
  • phase change material 38 is supplied by the electric heater 48 ther ⁇ mix energy.
  • the Phasen promptmateri ⁇ al is indirectly heated.
  • the heater 48 heats the wall 40 of the flow guide unit 16.
  • the thermal energy Ener ⁇ which is incorporated here by the wall 40 is passed on to the heat transfer medium.
  • the heat transfer medium again, the thermal energy is passed to the capsules 56 and to the phase change material 38 enclosed in the capsules 56.
  • the heater can deliver thermal energy directly to the wall and thereby slow down the cooling of the wall.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pipe Accessories (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • General Induction Heating (AREA)
  • Thermal Insulation (AREA)

Abstract

L'invention concerne un procédé pour ralentir le refroidissement d'une unité de guidage d'écoulement (16). Pour ralentir le refroidissement de l'unité de guidage d'écoulement (16) de manière efficace, il est proposé que l'unité de guidage d'écoulement (16) comporte une unité de maintien de chaleur (36) et soit traversée par un milieu caloporteur, que la température du milieu caloporteur soit réduite de façon à refroidir une paroi (40, 50) de l'unité de guidage d'écoulement (16) et que l'unité de maintien de chaleur (36) dégage de l'énergie thermique de façon à ralentir le refroidissement de la paroi (40, 50).
EP16721368.5A 2015-06-02 2016-04-19 Procédé pour ralentir le refroidissement d'une unité de guidage d'écoulement et unité de guidage d'écoulement Withdrawn EP3283735A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015210156 2015-06-02
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DE102019210737A1 (de) * 2019-07-19 2021-01-21 Siemens Aktiengesellschaft Gasturbine mit thermischem Energiespeicher, Verfahren zum Betreiben und Verfahren zur Modifikation
CN111520200A (zh) * 2020-05-29 2020-08-11 上海电力大学 一种相变控温的燃气轮机涡轮预热装置
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CN107683365A (zh) 2018-02-09
WO2016192887A1 (fr) 2016-12-08

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