EP2577002A2 - Verfahren und vorrichtung zur speicherung und abgabe von energie - Google Patents
Verfahren und vorrichtung zur speicherung und abgabe von energieInfo
- Publication number
- EP2577002A2 EP2577002A2 EP11758090.2A EP11758090A EP2577002A2 EP 2577002 A2 EP2577002 A2 EP 2577002A2 EP 11758090 A EP11758090 A EP 11758090A EP 2577002 A2 EP2577002 A2 EP 2577002A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- water
- gas
- pressure accumulator
- energy
- pressure
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 208
- 230000008569 process Effects 0.000 claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 238000007906 compression Methods 0.000 claims abstract description 10
- 230000006835 compression Effects 0.000 claims abstract description 7
- 230000005611 electricity Effects 0.000 claims abstract description 5
- 238000001704 evaporation Methods 0.000 claims description 25
- 230000008020 evaporation Effects 0.000 claims description 24
- 238000009833 condensation Methods 0.000 claims description 8
- 230000005494 condensation Effects 0.000 claims description 8
- 238000011084 recovery Methods 0.000 claims description 8
- 239000000498 cooling water Substances 0.000 claims description 7
- 238000012546 transfer Methods 0.000 claims description 5
- 230000008901 benefit Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 88
- 238000004146 energy storage Methods 0.000 description 16
- 239000002918 waste heat Substances 0.000 description 11
- 238000011161 development Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000010248 power generation Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000005338 heat storage Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- F01K21/00—Steam engine plants not otherwise provided for
- F01K21/04—Steam engine plants not otherwise provided for using mixtures of steam and gas; Plants generating or heating steam by bringing water or steam into direct contact with hot gas
-
- 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
- F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
- F01K3/004—Accumulation in the liquid branch of the circuit
-
- 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
- F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
- F01K3/12—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having two or more accumulators
Definitions
- the invention relates to a method for storage and release of energy, wherein the energy is stored partly in water, wherein the water is heated. Furthermore, the invention relates to a device for storing and releasing energy with a gas pressure accumulator.
- Energy storage power plants to store excess energy to make it available at peak load times have long been known. These power plants are many different techniques for energy storage, such. As chemical storage, mechanical storage with moving flywheels, pump buzzing or compressed air storage in various designs on.
- the energy storage medium according to the invention also preferably the media gas and water are used.
- CONFIRMATION COPY stored in the form of hot water or steam, which heats stored on demand compressed air by means of the stored heat, and then to drive with the heated air, a hot air turbine, which converts the energy stored by compressed air back into electricity.
- the waste heat of the air compressor unit is stored in a hot water storage to increase the efficiency of the turbine. Hot water is withdrawn from this hot water tank as needed and added to a partial pressure evaporator of the compressed air prior to entering the turbine for power generation.
- the waste heat of the air compressor unit is used for energy and on the other hand, the turbine power is increased in the combustion of a fuel.
- the hot water defined in the partial pressure evaporator must be sprayed into the compressed air to maintain the desired mixing ratio, with increasing emptying of the compressed air storage, the pressure conditions change greatly, which in turn makes the operation difficult.
- Compressed Air Energy Storage In compressed air storage using the AA-CAES process, the waste heat generated during compression of the compressed air is stored in heat accumulators of various types and different liquid or solid storage media. As a result, more air can be stored at the same storage volume and pressure. When removing the compressed air, this is heated to prevent cooling directly or by means of heat exchangers with the previously stored separately stored waste heat. The preheated compressed air is then fed to power generation of a compressed air turbine.
- This technique can increase the efficiency of energy storage to about 70% compared to about 40% for non-adiabatic storage. For this purpose, however, air compressor systems are required, which can work stably at high temperatures of about 700 ° C and memory large amounts of heat at high temperatures of z. B. 650 ° C store and if necessary, can give away quickly enough again.
- DE Compressed Air Energy Storage
- the air storage power plants are usually due to the high temperatures to solid storage, due to the low
- Thermal conductivity of the materials used have a poor heat transfer performance.
- the solids used have a significantly lower heat storage capacity than, for example, water or oil.
- a disadvantage of this type of energy storage and operation is that the stored energy is transmitted exclusively by the medium air with its low energy storage capacity, so that for the storage of energy disproportionately large pressure vessel in the form of z.
- the invention is based on the object to solve the problems described in the storage and removal of energy in the form of heat and pressurized gas and to provide the energy in the shortest possible time while increasing the efficiency of energy storage in adiabatic systems.
- Water pressure accumulator for energy output defined pressure conditions prevail and the delivery of water or steam can be done under controlled and predetermined conditions.
- the emptying of the water pressure accumulator must not be a complete emptying, but of course, the circumstances and the requirements also be a partial emptying.
- the presented invention offers the possibility of stabilizing the supply of energy from naturally highly fluctuating renewable energies such as e.g. Solar or wind energy.
- the energy is not stored mainly in the gaseous medium and with the aid of the resulting in the compression of the compressed air and stored waste heat, the decompression for
- the waste heat produced during the compression of a gas is used as the main energy source and the compressed gas for pressure regulation and pressure bias to store the waste heat energy and to provide it again.
- the technical problem to be solved is that a liquid, which is kept liquid under conditions of high vapor pressure, evaporates in the reservoir as soon as the container is emptied. For evaporation enthalpy is needed and the liquid cools down. This in turn means that no removal under stable static
- the invention relates to an energy storage, preferably operated with pressurized, hot water as a storage medium, wherein the physical conditions of the water in the storage container are kept constant when emptying.
- This is preferably achieved in that a tempered and heated gas or superheated steam is replenished demand-oriented via a valve, so that the water in the memory can not evaporate and thus the water is deprived of energy as enthalpy of vaporization.
- the pressure side preferably, the pressure side
- a gas compression for storing the gas in the gas pressure accumulator takes place and the heat generated thereby is used to heat the water pressure accumulator.
- the water pressure accumulator is emptied by the delivery of steam and thus a turbine is then driven to generate electricity.
- other power generation machines can be used. It is preferred that in the turbine or another
- Energy generating machine unusable energy is then used in other ways, in particular in an evaporation condenser for the treatment of raw water to desalinated water is used.
- an evaporation condenser for the treatment of raw water to desalinated water is used.
- an even more extensive use of the stored energy can take place.
- Water pressure accumulator is used to reheat the previously discharged steam after passing through the turbine so that it is used for a second pass through the turbine. Furthermore, it is a favorable embodiment of the invention that the output from the water pressure accumulator steam before passing through the
- Turbine is heated further with a superheater.
- the effectiveness of the process can be further increased.
- a portion of the compressed gas is stored in the water pressure accumulator, so that the hot
- Water in the water pressure accumulator can not evaporate.
- the gas in the gas pressure accumulator preferably has at least the same pressure as the water stored in the water pressure accumulator. This can effectively prevent the hot water from evaporating in the water pressure accumulator.
- the water from the water pressure accumulator is used directly as process steam. Even so, a good use of the energy stored in the water is possible.
- the task of storing and releasing energy with a gas pressure accumulator is achieved in that the device a water pressure accumulator and a gas pressure accumulator, that the water pressure accumulator is connected to the gas pressure accumulator so that the pressure in the water pressure accumulator is adjustable and can be emptied to release energy of the water pressure accumulator at a correspondingly adjusted pressure.
- the settings are conveniently carried out so that the physical
- the pressure is adjustable so that the water pressure accumulator emits water vapor during emptying.
- the release of water vapor is not absolutely necessary since it is also possible, for example, to work with a downstream overheating, in which steam is then produced.
- the emptying does not have to be complete, but takes place to the extent that energy, in particular in the form of water vapor, is required.
- the gas pressure accumulator and the water pressure accumulator with a gas compressor and associated gas pressure lines form a closed gas cycle.
- the number of gas pressure accumulator and the water pressure accumulator is preferably at least two.
- the number of gas pressure accumulator and water pressure accumulator can be increased arbitrarily in this closed gas cycle, so for example, to three, four or more water pressure accumulator.
- each water pressure accumulator is assigned a separate gas pressure accumulator.
- the water pressure accumulator is connected via a steam line with a power generation unit, in particular a turbine or piston engine, wherein in the steam line preferably a steam control valve is arranged, with which the steam pressure is adjusted for operation of the turbine.
- the gas compressor, the cooling water pipe, the pressurized water tank, a cooling water pump, a steam line, a turbine, the evaporation condenser, a water pipe, a water tank, a water pipe and a water pump preferably form a closed water cycle.
- the gas pressure accumulator and the water pressure accumulator are connected to each other via a gas pressure line, in which a pressure control valve is arranged, with which the pressure is adjusted, with which the water pressure accumulator is biased during the emptying process.
- a pressure control valve is arranged, with which the pressure is adjusted, with which the water pressure accumulator is biased during the emptying process.
- a heat exchanger for cooling the raw water supplied to the condenser is still arranged in the energy recovery circuit.
- this heat exchanger is adjustable in its performance. The amount of energy needed to produce the biased gas is several orders of magnitude smaller than the enthalpy of vaporization of the water in the water pressure accumulator, so that the energy required to maintain pressure and temperature is very small relative to the stored energy.
- the gas compressor unit is with
- Cooled water in a cooling circuit wherein the water of the cooling circuit absorbs and stores the heat energy resulting from the gas compression.
- the water is advantageously and according to the invention at temperatures just below the value for critical water (374.15 ° C, 221, 2 bar) heated, with higher or lower temperatures in others
- the water of the cooling circuit is collected in pressure vessels, which are acted upon by a part of the compressed gas from the closed gas cycle, wherein the applied pressure of the compressed gas may be higher than the actual pressure of the hot water.
- compressed gas at least equal but preferably higher pressure is stored in one or more accumulator and surge tanks.
- a turbine or other suitable unit as steam or superheated steam is supplied and relaxed and can thereby perform work that can be used to generate electricity.
- Known measures to increase the efficiency of a steam turbine can be used at this point.
- the method according to the invention has the advantage that the temperature and the pressure of the hot water (steam) can be kept constant during the emptying over the complete contents of the water containers and the energy can be provided at the desired temperature and pressure level.
- compressed gas from the surge tanks in the hot water storage tanks are routed through an adjustable pressure reducing valve set to the desired working pressure.
- the steam is condensed in a condensation unit arranged behind the turbine or other energy conversion unit, so that a vacuum is created and the entire working band is used and losses can be minimized.
- the condensation unit the water and possibly entrained compressed gas is separated and recovered.
- the condensation unit can, for. Example, consist of a described in the patent application 102008045201.7 evaporation condenser, so that the waste heat on a still well usable
- Temperature level is incurred, for. B. can be used to obtain demineralized water.
- the water cycle which changes over the phase change from liquid to gas and vice versa, thermal and kinetic energy into mechanical, is also closed.
- This has the advantage that as usual in steam technology unproblematic desalted water can be used.
- the water is again supplied to one or more free storage tanks, the gas accordingly free pressure vessels, where it can be stored at any pressure depending on the version.
- Pressurized water storage is the fact that the energy stored in the water can also be used directly in process steam and heating circuits. Since the ability of the water to store energy is much greater than that of the air, in the inventive arrangement for the same storage capacity much smaller memory can be used as z. B. in conventional compressed air storage.
- FIG. 1 shows one of the inventions presented here
- the gas compressor 2 is supplied with usable energy as drive power.
- the gas compressor 2 is advantageously supplied from an energy source 1 with electrical energy.
- the energy source 1 can also provide mechanical energy for driving the gas compressor 2.
- the gas compressor 2 forms with the gas pressure lines 3, 6, 9, the gas pressure accumulator 4 and the water pressure accumulator 8 a gas circulation.
- the gas compressor 2 is cooled during the gas compression process via the cooling circuit consisting of the cooling water lines 10, 11, the cooling water pump 12 and the water pressure accumulator 8, so that the resulting during the gas compression process in the gas compressor 2 heat energy dissipated and stored in the water pressure accumulator 8 in the form of hot water becomes.
- the cooling water of the cooling circuit is heated by recording the heat energy of the gas compressor 2 to advantageously about 370 ° C, ie just below the critical value, while at another
- the gas of the gas circulation is compressed by the gas compressor 2 at least to the value corresponding to the temperature of the water of about 220 bar, with higher pressures possible and may be more advantageous under certain conditions.
- a portion of the compressed gas is preferably in the water pressure accumulator 8, so that the water in the water pressure accumulator 8 can not evaporate and is biased.
- the gas pressure accumulator 4 which is connected via a gas pressure line 6 to the water pressure accumulator 8.
- a pressure control valve 7 is arranged in the gas pressure line 6 between the gas pressure accumulator 4 and the water pressure accumulator 8.
- the pressure control valve 7 serves to adjust the gas pressure, with the gas flows from the gas pressure accumulator 4 via the gas pressure line 6 in the water pressure accumulator 8 to keep the pressure in the water pressure accumulator 8 at the desired level during emptying.
- Other technical solutions for water gas management are also possible.
- the hot water from the water pressure accumulator 8 is for relaxation and to perform work via a steam line 13 and a superheater 36 of an energy conversion unit, in this example, a turbine 15 is supplied.
- a steam control valve 14 is provided, through which the steam of the hot water from the water pressure accumulator 8 is set to the desired pressure in front of the turbine 15.
- Other measures of pressure control are also possible.
- the turbine 15 drives a power generator 16 to generate electrical energy from the thermal energy and the mechanical energy.
- the relaxed, cooled steam is fed downstream of the turbine 15 via a steam line 17 according to the invention to an evaporation condenser 18 or another use. In the evaporation condenser 18, the steam is condensed, so that a negative pressure is created, which supports the energy conversion process.
- the desalinated water of the cooling circuit of the gas compressor 2 is recovered as condensate.
- Condensate is fed from the evaporation condenser 18 via a water line 19 to a water reservoir 20.
- the water is preferably kept ready for the cooling circuit of the gas compressor 2 and pumped as needed, so in renewed compression process for energy storage, via a water pipe 21 and a feed pump 22 in the cooling circuit of the gas compressor 2, preferably in the water pressure accumulator 8.
- a water pipe 21 and a feed pump 22 in the cooling circuit of the gas compressor 2
- a water pressure accumulator 8 possibly entrained gas from the gas cycle is separated from the water in the water tank 20 and made available to the gas compressor 2 via a suction line 34 and a valve 35 again.
- the cooling and condensation of the vapor in the evaporation condenser 18 is achieved by evaporation of raw water on the evaporator side of the evaporation condenser 18 and the associated energy transfer.
- raw water can z. B. seawater can be used, so that the evaporation condenser 18 using the waste heat from the power generation in the turbine 15 allows the treatment of seawater to service water.
- the raw water is held in the exemplary arrangement described in Figure I in a raw water reservoir 23 and fed via a raw water line 25 by raw water pump 24 to the evaporation condenser 18.
- the water vapor produced by evaporation is supplied via a steam line 26 to a condenser 27, where the energy contained in the water vapor to another energy recovery cycle, consisting of the raw water pipes 28, 29, the raw water circulation pump 30 and the heat exchanger 31 as a cooler, is transmitted.
- the raw water is preheated in the raw water reservoir 23, so that the energy loss is minimal.
- Figure II is a simpler form of energy recovery and
- the raw water is fed directly to the condenser 27 as a cooling medium and is thus preheated for the evaporation process in the evaporation condenser 18.
- the achievable energy recovery rate is lower than in the sketched in Figure I.
- the condensate obtained in the condenser 27 is fed via a service water pipe 32 to a service water collecting tank 33.
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)
- Separation By Low-Temperature Treatments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201010022088 DE102010022088A1 (de) | 2010-05-31 | 2010-05-31 | Grundlastfähiges Energiespeicherkraftwerk mit Brauchwasseraufbereitung |
PCT/DE2011/001177 WO2012048670A2 (de) | 2010-05-31 | 2011-05-31 | Verfahren und vorrichtung zur speicherung und abgabe von energie |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2577002A2 true EP2577002A2 (de) | 2013-04-10 |
EP2577002B1 EP2577002B1 (de) | 2016-10-19 |
Family
ID=44653919
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11758090.2A Active EP2577002B1 (de) | 2010-05-31 | 2011-05-31 | Verfahren und vorrichtung zur speicherung und abgabe von energie |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2577002B1 (de) |
DE (1) | DE102010022088A1 (de) |
PL (1) | PL2577002T3 (de) |
WO (1) | WO2012048670A2 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013185783A1 (de) * | 2012-06-11 | 2013-12-19 | Arano-Trade Ltd. | Energietransformations-system |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3939356A (en) * | 1974-07-24 | 1976-02-17 | General Public Utilities Corporation | Hydro-air storage electrical generation system |
DE2536447B2 (de) * | 1974-09-16 | 1977-09-01 | Gebruder Sulzer AG, Winterthur (Schweiz) | Anlage zur speicherung von energie eines elektrischen versorgungsnetzes mittels druckluft und zur wiederverwertung derselben |
CH593423A5 (de) | 1976-03-15 | 1977-11-30 | Bbc Brown Boveri & Cie | |
DE2649136A1 (de) * | 1976-10-28 | 1978-05-11 | Wolf Klemm | Antrieb, der mit in stroemungsmitteln gespeicherter energie betrieben wird |
CH640601A5 (de) * | 1979-09-07 | 1984-01-13 | Bbc Brown Boveri & Cie | Gleichdruckluftspeicheranlage mit wasservorlage fuer gasturbinenkraftwerke. |
DE3002892A1 (de) * | 1979-12-05 | 1981-06-11 | BBC AG Brown, Boveri & Cie., Baden, Aargau | Gleichdruckluftspeicheranlage mit wasservorlage fuer gasturbinenkraftwerke |
CH659855A5 (de) * | 1981-11-16 | 1987-02-27 | Bbc Brown Boveri & Cie | Luftspeicher-kraftwerk. |
DE4427987A1 (de) | 1994-08-08 | 1996-02-15 | Abb Management Ag | Luftspeicherturbine |
DE19909611C1 (de) * | 1999-03-05 | 2000-04-06 | Gerhard Stock | Gasausdehnungselement für eine Anordnung zum Umwandeln von thermischer in motorische Energie, insbesondere für einen Warmwassermotor |
DE102006022783A1 (de) | 2006-05-16 | 2007-05-03 | Ed. Züblin Ag | Wärmespeicher für adiabatische Druckluftspeicherung zum Zwecke der Energiespeicherung |
KR100792790B1 (ko) * | 2006-08-21 | 2008-01-10 | 한국기계연구원 | 압축공기저장발전시스템 및 이를 이용한 발전방법 |
ITBZ20070049A1 (it) * | 2007-11-23 | 2009-05-24 | Walu Tec Di Christoph Schwienb | Apparecchiatura per il recupero di energia da macchine motorici |
DE102008047557A1 (de) | 2008-05-30 | 2009-12-03 | Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR) | Vorrichtung und Anlage zum Speichern von thermischer Energie |
DE102009036550A1 (de) | 2008-11-01 | 2010-05-06 | Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR) | Vorrichtung und Anlage zum Zwischenspeichern thermischer Energie |
-
2010
- 2010-05-31 DE DE201010022088 patent/DE102010022088A1/de not_active Withdrawn
-
2011
- 2011-05-31 EP EP11758090.2A patent/EP2577002B1/de active Active
- 2011-05-31 PL PL11758090T patent/PL2577002T3/pl unknown
- 2011-05-31 WO PCT/DE2011/001177 patent/WO2012048670A2/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2012048670A2 * |
Also Published As
Publication number | Publication date |
---|---|
PL2577002T3 (pl) | 2017-03-31 |
WO2012048670A3 (de) | 2014-06-12 |
EP2577002B1 (de) | 2016-10-19 |
WO2012048670A2 (de) | 2012-04-19 |
DE102010022088A1 (de) | 2011-12-01 |
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