摘要:
Es wird ein Verfahren zum Speichern und Rückgewinnen von Energie vorgeschlagen, bei dem in einem Energiespeicherzeitraum ein Luftverflüssigungsprodukt (LAIR) gebildet und in einem Energierückgewinnungszeitraum unter Verwendung zumindest eines Teils des Luftverflüssigungsprodukts (LAIR) ohne Wärmezufuhr aus einer externen Wärmequelle ein Druckstrom gebildet und arbeitsleistend entspannt wird. Das Verfahren umfasst unter anderem, zur Bildung des Luftverflüssigungsprodukts (LAIR) Luft (AIR) in einer Luftkonditioniereinheit (10) zumindest mittels einer adiabat betriebenen Verdichtereinrichtung (12) zu verdichten, stromab der adiabat betriebenen Verdichtereinrichtung (12) aus der in dieser verdichteten Luft (AIR) einen ersten und einen zweiten Teilstrom zu bilden und den ersten und den zweiten Teilstrom parallel durch eine erste Wärmespeichereinrichtung (131) und eine zweite Wärmespeichereinrichtung (132) zu führen, wo bei der Verdichtung der Luft (AIR) erzeugte Wärme zumindest zum Teil gespeichert wird. Zur Bildung des Druckstroms wird unter anderem aus zumindest einem Teil des Verflüssigungsprodukts (LAIR) ein Entflüssigungsprodukt (HPAIR) erzeugt. Der Druckstrom wird bei der arbeitsleistenden Entspannung durch eine erste Entspannungseinrichtung (61) und eine zweite Entspannungseinrichtung (62) geführt und dabei jeweils entspannt. Stromauf der ersten Entspannungseinrichtung (61) wird dabei in der ersten Wärmespeichereinrichtung (131) gespeicherte Wärme auf den Druckstrom übertragen und stromauf der zweiten Entspannungseinrichtung (62) wird in der zweiten Wärmespeichereinrichtung (132) gespeicherte Wärme auf den Druckstrom übertragen. Eine Anlage (100) ist ebenfalls Gegenstand der vorliegenden Erfindung.
摘要:
A method for controlling a flow of fluid through a heat exchanger (3) in which heat is transferred from a first fluid (F HTF ) to a second fluid (F MS ). A flow regulator (13, 14) is arranged to regulate a flow of the second fluid (F MS ) passed through the heat exchanger (3), the method comprising: determining (102) a first difference ( HAT ) between an inlet temperature ( T hot in ) of the first fluid (F HTF ) and an outlet temperature ( T cold out ) of the second fluid (F MS ); determining (102) a second difference ( CAT ) between an outlet temperature ( T hot out ) of the first fluid (F HTF ) and an inlet temperature ( T cold in ) of the second fluid (F MS ); determine (104) first and second error values ( ε HAT , ε CAT ) by calculating differences between two predetermined values ( HAT target , CAT target ) and the respective of the first and second differences ( HAT, CAT ) ; and controlling (116) the flow regulator (13, 14) in dependence of the error values ( ε HAT , ε CAT ).
摘要:
The invention relates to a solar power plant comprising a solar field (2.1, 2.2) that produces steam, a turbine that uses the steam, and a system (ST1) for the storage and release of the surplus steam. The system comprises a module (12) for heat storage in the form of latent heat and a liquid-displacement heat storage module including a volume of liquid (V) and a steam cover (30), said modules (12, 14) being interconnected such that the steam produced passes through the steam cover (30) before passing through the latent heat module (12) and condensing, in order to be then injected into the volume of liquid (V), the lower part (ZF) of the volume of liquid (V) being connected to the solar field (2.1, 2.2) and at the outlet of the turbine so as to admit or expel cold liquid. The volume of liquid (V) operates as a liquid displacement tank.
摘要:
The invention relates to a system for storing and outputting thermal energy and a method for operating said system. The system operates according to the Brayton cycle, wherein a heat accumulator (14) is charged by means of a compressor (13) and a cold accumulator (16) is charged by means of turbines (15). Said cycle is reversed for discharging. In addition, according to the invention, the cold accumulator supplies a cooling circuit, which provides the cooling for a superconducting generator (36) by means of a cooling unit (33). A favorable generator weight can thereby be advantageously achieved in particular for wind turbines (22), because the generators are limited regarding the weight thereof due to being housed in the nacelle of the wind power plant (22). Thus, advantageously higher power can be converted in the wind power plant (22).
摘要:
The invention relates to an installation for storing thermal energy, comprising a heat accumulator (14) and a cold accumulator (16). The invention further relates to a method for charging and discharging said thermal accumulators (14, 16). Using the installation, excess electrical energy supplied by wind power plants (22), for example, can be utilized for converting mechanical energy from a compressor (13) and a turbine (15) into thermal energy by means of a motor (M), which is then made available in the heat accumulator (14) and the cold accumulator (16) for a subsequent generation of electrical energy using a generator (G). According to the invention, a temporary heat store (12) is discharged during the charging of the heat accumulator (14) and the cold accumulator (16), said temporary heat store preheating the working gas for the compressor (13) to 80 °C, for example. In this way, temperatures of above 500 °C can be obtained in the heat accumulator (14), even by compressing the working gas to only 15 bar. Compressors for compressing working gases up to 15 bar, advantageously, represent a good technical compromise. When the heat accumulator (14) and the cold accumulator (16) are discharged via the turbine (18) and the compressor (19) for the purpose of generating electrical energy, the temporary store (12) can be recharged so that the heat stored therein can be made available for a subsequent charging process of the heat accumulator (14) and the cold accumulator (16).
摘要:
A basic part (1) of a plant in primary industry emits hot exhaust gases in a first phase (P1) of the plant cycle, but not, or only scarcely, in a second phase (P2) of the plant cycle. The exhaust gases are discharged via a system of pipelines (2). In an evaporator device (5, 7) installed there, at least in the first phase (P1) water is evaporated and fed to a steam storage device (9, 11). In the first phase (P1), the stored steam is passed through a superheater (6), installed in the system of pipelines (2), and superheated there. A first part of the superheated steam is passed in a charging direction through a buffer store (16). It heats up a storage medium located there. The remaining superheated steam is passed to a steam turbine (17) while bypassing the buffer store (16). In the second phase (P2), saturated steam is taken from the steam storage device (9, 11), at least partially passed through the superheater (6) and combined with superheated steam, which is removed from the buffer store (16) counter to the charging direction. The combination of the two streams of steam is passed to the steam turbine (17).
摘要:
A thermoelectric energy storage (TEES) system having a charging cycle (10) for providing thermal energy to a hot thermal storage arrangement (18, 22, 24), and a discharging cycle (30) for generating electricity by retrieving the thermal energy from the hot thermal storage arrangement (18, 22, 24), the thermoelectric energy storage system including regenerative heat exchange. The system comprises a working fluid circuit adapted to circulate a gaseous working fluid through the hot thermal storage arrangement (18, 22, 24) and a cold thermal storage arrangement (14, 26, 28), wherein the hot thermal storage arrangement comprises a hot storage heat exchanger (18) and at least two hot storage tanks (22, 24) coupled via the hot storage heat exchanger (18). The cold thermal storage arrangement comprises a cold storage heat exchanger (14) and at least two cold storage tanks (26, 28) coupled via a cold storage heat exchanger (14). The system also provides a regenerative heat exchanger (20), adapted to further cool the working fluid at the output of the hot thermal storage arrangement during the charging cycle (10), and to pre-heat the working fluid at the input into the hot thermal storage arrangement during a discharging cycle (30). Notably, the working fluid is constantly in gas phase during the charging and discharging cycles.
摘要:
Die Erfindung betrifft eine Anlage zur Speicherung thermischer Energie. Die Speicherung erfolgt durch Verdichten und Entspannen eines Arbeitsgases, wobei Pumpe und Verdichter beispielsweise durch Elektromotoren angetrieben werden können, welche temporär im Netz zu viel erzeugten Strom verbrauchen. Die erzeugte thermische Energie wird in einem Kältespeicher (16) und einem Wärmespeicher (14) zwischengespeichert. Erfindungsgemäß ist vorgesehen, dass zum Entladen der Anlage ein Dampfkreislauf (40) an den Wärmespeicher (14) und den Kältespeicher (16) angeschlossen wird, mit dessen Hilfe eine Turbine (43) zur Gewinnung von elektrischer Energie durch einen Generator (G) angetrieben werden kann. Dieser Kreislauf ist über ein anderes Leitungssystem (4) verwirklicht, als der Kreislauf (nicht dargestellt) zur Aufladung der Anlage. Vorteilhaft kann daher aus Überkapazitäten im elektrischen Netz gewonnene thermische Energie mit hohem Wirkungsgrad über einen Dampfkreislauf in elektrische Energie zurückgewandelt werden.