EP2666976A1 - Coupling of a turbopump for molten salts - Google Patents
Coupling of a turbopump for molten salts Download PDFInfo
- Publication number
- EP2666976A1 EP2666976A1 EP12169483.0A EP12169483A EP2666976A1 EP 2666976 A1 EP2666976 A1 EP 2666976A1 EP 12169483 A EP12169483 A EP 12169483A EP 2666976 A1 EP2666976 A1 EP 2666976A1
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- Prior art keywords
- turbine
- pump
- tower
- coupling
- fluid
- Prior art date
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- 150000003839 salts Chemical class 0.000 title claims abstract description 44
- 230000008878 coupling Effects 0.000 title claims abstract description 19
- 238000010168 coupling process Methods 0.000 title claims abstract description 19
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 19
- 239000012530 fluid Substances 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 238000009434 installation Methods 0.000 claims description 8
- 241000196324 Embryophyta Species 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 7
- 239000013529 heat transfer fluid Substances 0.000 claims description 6
- IIPYXGDZVMZOAP-UHFFFAOYSA-N lithium nitrate Chemical compound [Li+].[O-][N+]([O-])=O IIPYXGDZVMZOAP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Inorganic materials [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 4
- 230000001413 cellular effect Effects 0.000 claims description 3
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Inorganic materials [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 3
- 238000010248 power generation Methods 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 2
- 239000011591 potassium Substances 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- 244000234281 Tamarix gallica Species 0.000 claims 1
- 238000011084 recovery Methods 0.000 abstract description 9
- 239000002826 coolant Substances 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 6
- 238000002507 cathodic stripping potentiometry Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 208000031968 Cadaver Diseases 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000005496 eutectics Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910013553 LiNO Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- RLQJEEJISHYWON-UHFFFAOYSA-N flonicamid Chemical compound FC(F)(F)C1=CC=NC=C1C(=O)NCC#N RLQJEEJISHYWON-UHFFFAOYSA-N 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 239000011833 salt mixture Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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
- 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
-
- 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
- F01K7/22—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 the turbines having inter-stage steam heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/006—Methods of steam generation characterised by form of heating method using solar heat
Definitions
- the present invention relates to the field of combined cycle thermal power plants.
- the subject of the present application relates to solar concentrating power plant (CSP) plants of the solar tower type, using as heat transfer fluid molten salts and in which are used vertical pumps for the circulation and transfer of melted salts carried at high temperature.
- CSP solar concentrating power plant
- heliostats in the form of flat mirrors
- solar receivers located at the top of the tower, with heliostats arranged in such a way that the shadows created by mirrors do not interfere with neighboring mirrors.
- the solar receiver heated by concentrated incident solar rays, will generate a hot fluid that will then be used at ground level to produce high pressure steam capable of driving a turbine and generating electricity.
- the heated fluid at the top of the tower may be directly steam, or air, or a thermal oil. But it can also be a molten salt consisting of a mixture of two or three specific salts, or more, used as a heat transfer fluid.
- a mixture of sodium nitrate (NaNO 3 ) and potassium nitrate (KNO 3 ) is often used, for example in a 60% / 40% ratio, forming an atmospheric pressure eutectic having a reduced melting temperature at 220 ° C and offering good chemical and thermal stability between the melting point and 600 ° C.
- a ternary mixture of salts comprising, in addition to the two aforementioned salts, lithium nitrate (LiNO 3 ), it is even possible to obtain a eutectic having a melting temperature as low as 120 ° C.
- a great advantage of this salt mixture is its possibility of storage in large quantities at high temperature under atmospheric pressure, at a reduced cost. Storage allows the decoupling of solar energy uptake and electricity generation, regardless of sunlight and solar time, including overnight.
- the operating principle of a combined cycle CSP plant is known and described for example in the document WO 2011/077248 .
- the figure 1 schematically shows the principle of a tower-type concentrating solar power plant 1.
- the salt is kept liquid in a first insulated cold storage tank 2 at a temperature not lower than 260 ° C.
- Pumps 3 are necessary to bring the molten salt to the top of the tower 1 and given the large flow required and the high density of the salt, the power absorbed by the pumps is quite high, an amplitude of 4 MW for a central high power (typically 150 MW).
- the salt is heated at 550 ° C by concentrated solar heat as specified above via one or more exchangers 20, distributed for example according to four cavities, consisting of thin-walled steel tubes.
- the heated salt is returned to a second insulated hot storage tank 5.
- the capacity of this tank depends on the supply time required for the turbine producing the electricity.
- the hot salt is sent by a pump 6 to a conventional steam generation system 7 to produce superheated steam for an electricity generator 9 with a turbine 8.
- figure 1 shows also a detailed example, and not limited to the present invention, steam generator 7 according to the state of the art.
- the molten salt circuit is referenced 17 and the water / steam circuit is referenced 18 on the figure 1 .
- the CSP tower plants have some disadvantages including the need to use very specific pumps, the design of salt exchangers melting / water-steaming and the need to monitor the relatively high temperatures of molten salts.
- the present invention aims to overcome the disadvantages of the state of the art.
- the invention aims to reduce the power absorption of the heat transfer fluid pumps at the top of the central tower or to compensate it by a power recovery at another location.
- a first object of the present invention relates to a device comprising at least one vertical pump and at least one associated turbine, for the transport, on a difference in level, of a coolant heated to a high temperature, the pump providing a movement ascending said fluid in a first section of a conduit from a first so-called cold reservoir and the turbine being actuated by said fluid during the downward return movement of said fluid in a second section of the conduit to a second so-called hot reservoir, characterized in that the device further comprises a device for coupling the turbine with the pump configured so that the mechanical energy produced by the turbine is reused for actuating the pump.
- the difference in level between the molten salt storage tanks and the exchangers at the top of the tower is at least 150 m.
- the molten salt pressures can be up to 60 bar.
- the molten salts include sodium, potassium and / or lithium nitrate.
- the figure 1 schematically shows a central tower type CSP solar power plant, with circulation of molten salt and coupling to a conventional power generation system.
- the figure 2 shows a schematic view of the mechanical coupling system, according to the invention, between the pump for conveying the heat transfer fluid to the central tower and the power recovery turbine at the return of the heat transfer fluid to the storage tank.
- the pumps 3 and the power recovery turbines 4 are mechanically coupled together in order to recover energy with the best possible efficiency.
- the pump must be dimensioned taking into account the following three parameters: its length (about 15 m for example), its variable speed and the high power required.
- the power recovery turbines will be of the same design, possibly with specific impeller wheels. he In principle, it is sufficient to operate the centrifugal pumps in the opposite direction to be in turbine mode.
- the mechanical coupling pump-turbine is provided by a gearbox 21, with cardan coupling 41 on the turbine side to allow differential expansion between the pump 3 and the turbine 4.
- the turbines 4 can not recover all the power consumed by the pumps, given the efficiency of the pumps and turbines, playing in opposite directions.
- the compensation of the power difference will be provided by electric pumps of the same type (not shown), moreover necessary to overcome the losses and also to start the system.
- the pumps 3 and the recovery turbines 4 will be electrically coupled.
- the pumps 3 are actuated by an asynchronous motor and the turbines are coupled to an asynchronous motor also acting as a generator, the turbine engine being faster.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Energy (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
Description
La présente invention se rapporte au domaine des centrales solaires thermiques à cycle combiné. En particulier, l'objet de la présente demande se rapporte aux installations de production d'énergie à concentration solaire CSP (pour Concentrated Solar Power plant), du type à récepteurs solaires en tour, utilisant comme fluide caloporteur des sels fondus et dans lesquelles sont utilisées des pompes verticales pour la circulation et le transfert des sels fondus portés à haute température.The present invention relates to the field of combined cycle thermal power plants. In particular, the subject of the present application relates to solar concentrating power plant (CSP) plants of the solar tower type, using as heat transfer fluid molten salts and in which are used vertical pumps for the circulation and transfer of melted salts carried at high temperature.
Dans les CSP du type à tour centrale, un grand nombre d'héliostats (sous forme de miroirs plans) reflètent la lumière solaire vers un ou plusieurs récepteurs solaires, situés au sommet de la tour, les héliostats étant disposés de manière telle que les ombres créées par les miroirs n'interfèrent pas avec les miroirs voisins.In central-tower type CSPs, a large number of heliostats (in the form of flat mirrors) reflect sunlight to one or more solar receivers, located at the top of the tower, with heliostats arranged in such a way that the shadows created by mirrors do not interfere with neighboring mirrors.
Le récepteur solaire, chauffé par les rayons solaires incidents concentrés va générer un fluide chaud qui sera ensuite utilisé au niveau du sol pour produire de la vapeur à haute pression capable d'entraîner une turbine et de produire de l'électricité.The solar receiver, heated by concentrated incident solar rays, will generate a hot fluid that will then be used at ground level to produce high pressure steam capable of driving a turbine and generating electricity.
Le fluide chauffé au sommet de la tour peut être directement de la vapeur, ou de l'air, ou une huile thermique. Mais il peut aussi être un sel fondu consistant en un mélange de deux ou trois sels spécifiques, ou plus, utilisé comme fluide de transfert thermique.The heated fluid at the top of the tower may be directly steam, or air, or a thermal oil. But it can also be a molten salt consisting of a mixture of two or three specific salts, or more, used as a heat transfer fluid.
Par exemple, un mélange de nitrate de sodium (NaNO3) et de nitrate de potassium (KNO3) est souvent utilisé, par exemple selon un rapport 60%/40%, formant un eutectique à pression atmosphérique ayant une température de fusion réduite à 220°C et offrant une bonne stabilité chimique et thermique entre la température de fusion et 600°C. En utilisant un mélange ternaire de sels, comprenant, outre les deux sels précités, du nitrate de lithium (LiNO3), on peut même obtenir un eutectique ayant une température de fusion aussi basse que 120°C.For example, a mixture of sodium nitrate (NaNO 3 ) and potassium nitrate (KNO 3 ) is often used, for example in a 60% / 40% ratio, forming an atmospheric pressure eutectic having a reduced melting temperature at 220 ° C and offering good chemical and thermal stability between the melting point and 600 ° C. By using a ternary mixture of salts, comprising, in addition to the two aforementioned salts, lithium nitrate (LiNO 3 ), it is even possible to obtain a eutectic having a melting temperature as low as 120 ° C.
Un grand avantage de ce mélange de sels est sa possibilité de stockage en grande quantité à haute température sous pression atmosphérique, à un coût réduit. Le stockage permet le découplage entre la captation de l'énergie du soleil et la production d'électricité, indépendamment de l'ensoleillement et de l'heure solaire, en ce compris pendant la nuit.A great advantage of this salt mixture is its possibility of storage in large quantities at high temperature under atmospheric pressure, at a reduced cost. Storage allows the decoupling of solar energy uptake and electricity generation, regardless of sunlight and solar time, including overnight.
Le principe de fonctionnement d'une centrale CSP à cycle combiné est connu et décrit par exemple dans le document
Le circuit de sel fondu est référencé 17 et le circuit d'eau/vapeur est référencé 18 sur la
Des performances typiques pour une installation de 150 MW sont données dans le tableau 1.Typical performance for a 150 MW installation is given in Table 1.
Il est également connu que l'on pourrait utiliser dans ce type d'installation des turbines de récupération de puissance hydraulique 4 (HRPT pour Hydraulic Power Recovery Turbine). Celles-ci peuvent être installées dans la ligne de retour du sel chauffé au réservoir de stockage, afin de récupérer l'énergie mécanique (gravifique) du sel descendant du sommet de la tour jusqu'au sol, la puissance récupérable ayant une amplitude typique de 3 MW pour la centrale précitée.It is also known that one could use in this type of installation hydraulic power recovery turbines 4 (HRPT for Hydraulic Power Recovery Turbine). These can be installed in the return line of the heated salt to the storage tank, in order to recover the mechanical (gravific) energy of the salt descending from the top of the tower to the ground, the recoverable power having a typical amplitude of 3 MW for the aforementioned plant.
A côté d'un certain nombre d'avantages tels qu'une grande capacité de stockage de l'énergie sous pression atmosphérique, un faible coût du sel compatible avec le respect de l'environnement, une absence totale de risque au feu, une grande simplicité et des coûts réduits pour le récepteur solaire et des équipements associés en sommet de tour, les centrales CSP à tour présentent quelques désavantages dont la nécessité d'utiliser des pompes très spécifiques, la conception d'échangeurs sels fondus/eau-vapeur et la nécessité de surveiller les températures relativement élevées des sels fondus.In addition to a number of advantages such as a large storage capacity for energy at atmospheric pressure, a low cost of salt compatible with the respect of the environment, a total absence of risk to fire, a great Simplicity and reduced costs for the solar receiver and associated equipment at the top of the tower, the CSP tower plants have some disadvantages including the need to use very specific pumps, the design of salt exchangers melting / water-steaming and the need to monitor the relatively high temperatures of molten salts.
La présente invention vise à s'affranchir des inconvénients de l'état de la technique.The present invention aims to overcome the disadvantages of the state of the art.
En particulier, l'invention a pour but de réduire l'absorption de puissance des pompes d'acheminement du fluide caloporteur au sommet de la tour centrale ou de compenser celle-ci par une récupération de puissance à un autre endroit.In particular, the invention aims to reduce the power absorption of the heat transfer fluid pumps at the top of the central tower or to compensate it by a power recovery at another location.
Un premier objet de la présente invention se rapporte à un dispositif comprenant au moins une pompe verticale et au moins une turbine associée, pour le transport, sur une différence de niveau, d'un fluide caloporteur porté à haute température, la pompe assurant un mouvement ascendant dudit fluide dans une première section d'un conduit à partir d'un premier réservoir dit froid et la turbine étant actionnée par ledit fluide lors du mouvement de retour descendant dudit fluide dans une seconde section du conduit vers un second réservoir dit chaud, caractérisé en ce que le dispositif comprend en outre un dispositif de couplage de la turbine avec la pompe configuré pour que l'énergie mécanique produite par la turbine soit réutilisée pour l'actionnement de la pompe.A first object of the present invention relates to a device comprising at least one vertical pump and at least one associated turbine, for the transport, on a difference in level, of a coolant heated to a high temperature, the pump providing a movement ascending said fluid in a first section of a conduit from a first so-called cold reservoir and the turbine being actuated by said fluid during the downward return movement of said fluid in a second section of the conduit to a second so-called hot reservoir, characterized in that the device further comprises a device for coupling the turbine with the pump configured so that the mechanical energy produced by the turbine is reused for actuating the pump.
Selon des modes d'exécution préférés de l'invention, le dispositif comprend en outre une ou une combinaison adéquate des caractéristiques suivantes :
- la turbine est du même type que la pompe mais utilisée en sens inverse ;
- le dispositif de couplage est un dispositif mécanique ;
- le dispositif de couplage est un dispositif électrique ;
- le dispositif de couplage mécanique comprend une boîte à engrenages avec un accouplement à cardan situé côté turbine ;
- le dispositif de couplage électrique comprend un moteur asynchrone accouplé à la turbine et faisant office de génératrice, la pompe étant également actionnée par un moteur asynchrone ;
- la pompe ou la turbine est du type à axe vertical, mono- ou multi-étagée (multi)cellulaire avec roues à aubes radiales fermées ou semi-ouvertes ;
- la pompe ou la turbine est située au-dessus du réservoir ou est à corps immergé ;
- la pompe et la turbine sont conçues pour fonctionner avec un mélange de sels fondus dont la température est comprise entre 100 et 600°C.
- the turbine is of the same type as the pump but used in the opposite direction;
- the coupling device is a mechanical device;
- the coupling device is an electrical device;
- the mechanical coupling device comprises a gearbox with a cardan coupling located on the turbine side;
- the electrical coupling device comprises an asynchronous motor coupled to the turbine and acting as a generator, the pump being also actuated by an asynchronous motor;
- the pump or the turbine is of the type with vertical axis, mono- or multi-stage (multi) cellular with closed or semi-open radial impeller wheels;
- the pump or turbine is located above the tank or is immersed;
- the pump and the turbine are designed to operate with a mixture of molten salts with a temperature between 100 and 600 ° C.
Un second objet de la présente invention se rapporte à une installation de production d'énergie à concentration solaire comprenant :
- une pluralité d'héliostats disposés au sol autour d'une tour centrale de concentration, ladite tour comprenant en son sommet au moins un échangeur thermo-solaire ;
- un premier circuit de transport de sels fondus à partir d'un premier réservoir de stockage dit froid vers ledit échangeur et retour vers un second réservoir de stockage dit chaud pour les sels fondus portés à haute température, ledit échangeur se trouvant au somment de la tour, c'est-à-dire à une hauteur supérieure à celle des réservoirs ;
- un second circuit de génération de vapeur par échange thermique avec le premier circuit en sels fondus et de production d'électricité via un système turbine/générateur ;
- a plurality of heliostats disposed on the ground around a central concentration tower, said tower comprising at its peak at least one heat exchanger;
- a first circuit for transporting molten salts from a first so-called cold storage tank to said exchanger and return to a second so-called hot storage tank for molten salts heated at high temperature, said exchanger being at the top of the tower that is to say at a height greater than that of the tanks;
- a second heat exchange steam generation circuit with the first molten salt circuit and electricity generation via a turbine / generator system;
Avantageusement, la différence de niveau entre les réservoirs de stockage en sels fondus et les échangeurs au sommet de la tour est d'au moins 150 m.Advantageously, the difference in level between the molten salt storage tanks and the exchangers at the top of the tower is at least 150 m.
Avantageusement encore, les pressions en sels fondus peuvent aller jusqu'à 60 bar.Advantageously, the molten salt pressures can be up to 60 bar.
De préférence, les sels fondus comprennent le nitrate de sodium, de potassium et/ou de lithium.Preferably, the molten salts include sodium, potassium and / or lithium nitrate.
Des exemples de réalisation suivant l'état de la technique et l'invention sont décrits par la suite avec plus de détails à l'aide des figures annexées.Examples of embodiments according to the state of the art and the invention are described below in more detail with the aid of the appended figures.
La
La
Selon une première forme d'exécution préférée de la présente invention, les pompes 3 et les turbines de récupération de puissance 4 sont mécaniquement couplées ensemble afin de récupérer de l'énergie avec le meilleur rendement possible.According to a first preferred embodiment of the present invention, the
Le type de pompe nécessaire pour l'application en sel fondu selon l'invention est spécifique. On trouvera par exemple les caractéristiques suivantes pour de telles pompes :
- axe vertical ;
- construction mono- ou multi-étagée (multi)cellulaire avec roues fermées (ou semi-ouvertes) ;
- installation au-dessus du réservoir de sel, de préférence à corps immergé, afin de simplifier le drainage ;
- construction avec arbre en porte-à-faux possible si la profondeur d'immersion de la pompe, c'est-à-dire la distance entre la taque d'assise et la tubulure d'aspiration est suffisamment faible ; à défaut, nécessité de paliers intermédiaires sur la ligne d'arbre ;
- étanchéité d'arbre avec la plaque d'assise réalisée par un labyrinthe, avec retour par gravité des fuites vers le réservoir ;
- moteur électrique à fréquence variable ;
- utilisation de matériaux et d'une construction adéquats pour supporter les hautes températures des sels fondus, etc. Les matériaux utilisés seront par exemple résistants à la corrosion et à l'abrasion.
- vertical axis;
- single- or multi-stage (multi) cellular construction with closed (or semi-open) wheels;
- installation above the salt reservoir, preferably with a submerged body, to simplify drainage;
- construction with cantilevered shaft possible if the depth of immersion of the pump, that is to say the distance between the seat plate and the suction pipe is sufficiently low; failing this, the need for intermediate bearings on the shaft line;
- shaft sealing with the base plate made by a labyrinth, with return by gravity of leaks to the tank;
- variable frequency electric motor;
- use of materials and construction adequate to withstand the high temperatures of molten salts, etc. The materials used will for example be resistant to corrosion and abrasion.
De telles pompes ont déjà été utilisées dans le domaine solaire à collecteurs paraboliques au sol mais avec des pressions de fluide relativement faibles.Such pumps have already been used in the solar field with parabolic collectors on the ground but with relatively low fluid pressures.
La pompe doit être dimensionnée en tenant compte des trois paramètres suivants : sa longueur (environ 15 m par exemple), sa vitesse variable et la forte puissance requise.The pump must be dimensioned taking into account the following three parameters: its length (about 15 m for example), its variable speed and the high power required.
Avantageusement, selon l'invention, les turbines de récupération de puissance seront de la même conception, avec éventuellement des roues à aubes spécifiques. Il suffit en principe de faire fonctionner les pompes centrifuges en sens inverse pour se trouver en mode turbine. Le couplage mécanique pompe-turbine est assuré par une boîte à engrenages 21, avec accouplement à cardan 41 côté turbine afin de permettre les dilatations différentielles entre la pompe 3 et la turbine 4.Advantageously, according to the invention, the power recovery turbines will be of the same design, possibly with specific impeller wheels. he In principle, it is sufficient to operate the centrifugal pumps in the opposite direction to be in turbine mode. The mechanical coupling pump-turbine is provided by a
Dans l'état de l'art, on connaît uniquement des systèmes de couplage en ligne entre pompe horizontale et turbine, avec embrayage.In the state of the art, only in-line coupling systems are known between horizontal pump and turbine, with clutch.
Bien sûr, les turbines 4 ne peuvent pas récupérer la totalité de la puissance consommée par les pompes, vu les rendements des pompes et des turbines, jouant en sens opposé.Of course, the turbines 4 can not recover all the power consumed by the pumps, given the efficiency of the pumps and turbines, playing in opposite directions.
Toujours selon l'invention, la compensation de la différence de puissance sera assurée par des pompes électriques de même type (non représentées), d'ailleurs nécessaires pour vaincre les pertes de charge et aussi pour démarrer le système.Still according to the invention, the compensation of the power difference will be provided by electric pumps of the same type (not shown), moreover necessary to overcome the losses and also to start the system.
Selon une seconde forme d'exécution préférée de la présente invention, les pompes 3 et les turbines de récupération 4 seront couplées électriquement. Les pompes 3 sont actionnées par un moteur asynchrone et les turbines sont accouplées à un moteur asynchrone également faisant office de génératrice, le moteur de turbine étant plus rapide.According to a second preferred embodiment of the present invention, the
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- Tour à concentration solaireSolar Concentration Tower
- 22
- Réservoir de sel froidCold salt tank
- 33
- Pompe d'alimentation vers la tourFeed pump to the tower
- 44
- Turbine de récupérationTurbine recovery
- 55
- Réservoir de sel chaudHot salt tank
- 66
- Pompe de circulation vers le générateur de vapeurCirculation pump to the steam generator
- 77
- Générateur de vapeurSteam generator
- 88
- Turbine(s)Turbine (s)
- 99
- Générateur d'électricitéElectricity generator
- 1010
- CondenseurCondenser
- 1111
- Désaérateurdeaerator
- 1212
- Economiseursaver
- 1313
- Chaudière bouilloireBoiler kettle
- 1414
- SurchauffeurSuperheater
- 1515
- Resurchauffeurresurchauffeur
- 1616
- Pompe de mélangeMixing pump
- 1717
- Circuit de sel fonduMolten salt circuit
- 1818
- Circuit eau/vapeurWater / steam circuit
- 2020
- Récepteurs solaires et échangeursSolar receivers and exchangers
- 2121
- Boîte à engrenagesGearbox
- 4141
- Arbre à cardansCardan shaft
Claims (13)
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12169483.0A EP2666976A1 (en) | 2012-05-25 | 2012-05-25 | Coupling of a turbopump for molten salts |
ES13727820.6T ES2597738T3 (en) | 2012-05-25 | 2013-05-23 | Turbocharger connection for molten salts |
EP13727820.6A EP2855861B1 (en) | 2012-05-25 | 2013-05-23 | Coupling of a turbopump for molten salts |
MX2014014319A MX354292B (en) | 2012-05-25 | 2013-05-23 | Coupling of a turbopump for molten salts. |
US14/403,844 US9803625B2 (en) | 2012-05-25 | 2013-05-23 | Coupling of a turbopump for molten salts |
AU2013265313A AU2013265313B2 (en) | 2012-05-25 | 2013-05-23 | Coupling of a turbopump for molten salts |
PCT/EP2013/060577 WO2013174901A1 (en) | 2012-05-25 | 2013-05-23 | Coupling of a turbopump for molten salts |
TN2014000423A TN2014000423A1 (en) | 2012-05-25 | 2014-10-08 | COUPLING TURBOPOMPE FOR FILLED SALTS |
CL2014002835A CL2014002835A1 (en) | 2012-05-25 | 2014-10-21 | Device comprising at least one vertical pump and at least one associated turbine, for transporting a high-temperature heat transfer fluid, where the device also comprises a mechanical device for coupling the turbine with the pump; installation. |
ZA2014/08101A ZA201408101B (en) | 2012-05-25 | 2014-11-05 | Coupling of a turbopump for molten salts |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12169483.0A EP2666976A1 (en) | 2012-05-25 | 2012-05-25 | Coupling of a turbopump for molten salts |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2666976A1 true EP2666976A1 (en) | 2013-11-27 |
Family
ID=46148711
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12169483.0A Withdrawn EP2666976A1 (en) | 2012-05-25 | 2012-05-25 | Coupling of a turbopump for molten salts |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP2666976A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2449181A (en) * | 2007-05-10 | 2008-11-12 | Alstom Technology Ltd | Solar hybrid combined cycle power plant |
WO2011018814A2 (en) * | 2009-08-12 | 2011-02-17 | Turboden S.R.L. | Localized pressurization method and system for a diathermic oil circuit |
WO2011077248A2 (en) | 2009-12-23 | 2011-06-30 | Goebel, Olaf | Combined cycle solar power generation |
WO2011121852A1 (en) * | 2010-03-31 | 2011-10-06 | 国立大学法人東京工業大学 | Steam generation apparatus and energy supplying system using same |
-
2012
- 2012-05-25 EP EP12169483.0A patent/EP2666976A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2449181A (en) * | 2007-05-10 | 2008-11-12 | Alstom Technology Ltd | Solar hybrid combined cycle power plant |
WO2011018814A2 (en) * | 2009-08-12 | 2011-02-17 | Turboden S.R.L. | Localized pressurization method and system for a diathermic oil circuit |
WO2011077248A2 (en) | 2009-12-23 | 2011-06-30 | Goebel, Olaf | Combined cycle solar power generation |
WO2011121852A1 (en) * | 2010-03-31 | 2011-10-06 | 国立大学法人東京工業大学 | Steam generation apparatus and energy supplying system using same |
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