WO2022218899A1

WO2022218899A1 - Jet pump device, jet pump system and method for operating a jet pump device

Info

Publication number: WO2022218899A1
Application number: PCT/EP2022/059574
Authority: WO
Inventors: Felix Maus; Frank Baumann; Dennis Robin Wittmaier; Jan Hennig; Otto Wagenblast; Hubert Szulczynski; Daniel Mayer; Lutz Baumgaertner; Franz Sebastian KRUEGER
Original assignee: Robert Bosch Gmbh
Priority date: 2021-04-12
Filing date: 2022-04-11
Publication date: 2022-10-20
Also published as: DE102021203564A1

Abstract

The invention relates to a jet pump device (10), comprising: - at least one jet pump unit (18) for conveying a compressed fuel gas (15) from at least one gas reservoir unit (12) to at least one burner unit (14); - at least one recirculated-gas line (20) for returning a portion of the fuel gas (15), downstream of the at least one burner unit (14), back to the jet pump unit (18) as recirculated gas (25); and - at least one recirculated-gas heat exchanger unit (22), which is designed to heat the compressed fuel gas (15) by means of thermal energy of the recirculated gas (25). The invention also relates to the corresponding method for operating the jet pump device (10).

Description

description

Jet pump device, jet pump system and method for operating a

jet pump device

State of the art

A jet pump device with at least one jet pump unit for conveying a compressed fuel gas from at least one gas reservoir unit to at least one combustor unit, with at least one recirculated gas line for returning a proportion of the combustible gas downstream of the at least one combustor unit as recirculated gas back into the jet pump unit, has already been proposed been.

Disclosure of Invention

The invention is based on a jet pump device with at least one jet pump unit for conveying a compressed fuel gas from at least one gas reservoir unit to at least one combustor unit, with at least one recirculated gas line for returning a portion of the combustible gas downstream of the at least one combustor unit as recirculated gas back into the jet pump unit.

It is proposed that the jet pump device comprises at least one recirculated heat exchanger unit, which is designed to heat the compressed fuel gas with thermal energy from the recirculated gas.

A “jet pump device” should preferably be understood to mean at least a part, preferably a subassembly, of a jet pump. Preferably, the jet pump device can also include the entire jet pump senior The jet pump device is preferably intended for use in a fuel cell or in a turbomachine. The jet pump device is preferably provided, in particular as part of the jet pump, for accelerating a gas, preferably the fuel gas. At least one gas line preferably connects the at least one gas reservoir unit to the at least one combustor unit. The at least one jet pump unit is preferably coupled to the at least one gas line, in particular at least partially integrated into the at least one gas line. The at least one gas line preferably has at least one gas reservoir line and at least one burner line. “Provided” is to be understood as meaning preferably specially designed, specially equipped, specially designed and/or specially equipped. The fact that an object is provided for a specific function should preferably be understood to mean that the object fulfills and/or executes this specific function in at least one application and/or operating state. An "operating state of the jet pump device" should preferably be understood to mean a state in which the jet pump unit is ready for a pumping process and/or pumping operation and/or is coupled at least to the gas reservoir unit and/or to the at least one combustor unit and/or or is in pump operation, in which the fuel gas flows through the jet pump unit and advantageously entrains the recirculated gas, which is in particular part of the fuel gas.

The jet pump unit is preferably connected to the at least one gas reservoir unit by the at least one gas line. The jet pump unit is preferably connected to the at least one combustor unit by the at least one gas line. The fuel gas is preferably in the form of methane, hydrogen, coal gas, ethanol, propanol, glycerol, formaldehyde, ketone, hydrocarbon, formic acid, diethyl ether, ethylene glycol, glucose, ammonia, hydrazine, sodium borohydride and/or methanol. The fuel gas can be at a high pressure level in the at least one gas reservoir unit. A “high pressure level” is to be understood in particular as meaning a pressure of at least 2.5 bar, preferably at least 5 bar, particularly preferably at least 10 bar, for example 11 bar. The fuel gas at the ho hem pressure level can directly, in particular without compression, in the at least a jet pump unit can be introduced. In particular, the fuel gas can flow from the at least one gas reservoir unit through the at least one gas line into the at least one jet pump unit.

Alternatively, the fuel gas can be at a low pressure level in the at least one gas reservoir unit. A “low pressure level” should be understood to mean, in particular, a pressure of less than 2.5 bar, preferably less than 2 bar, for example 1 bar. The at least one compressor unit, which is designed to increase the pressure of the fuel gas, can be at least partially arranged in the gas line between the at least one gas reservoir unit and the at least one jet pump unit. The at least one compressor unit can be designed as a compressor unit, for example. A “compressed gas” should preferably be understood to mean a gas that is at a high pressure level. The jet pump unit can comprise the at least one compressor unit and/or the at least one gas line. In particular, the at least one compressor unit and/or the at least one gas line can be configured to be connected to the at least one jet pump body, in particular in one piece. “In one piece” is to be understood in particular as being materially connected, such as by a welding process and/or adhesive process, etc., and particularly advantageously molded, such as by production from a single cast and/or by production in a one-component or multi-component injection molding process.

The at least one jet pump unit preferably comprises at least one jet pump body. The at least one jet pump body delimits at least one jet pump cavity, which extends through the at least one jet pump body, in particular along a longitudinal axis of the at least one jet pump body. A “longitudinal axis” of an object is to be understood in particular as an axis which runs parallel to a longest edge of a smallest geometric cuboid which just completely encloses the object and preferably runs through a geometric center point of the object. The at least one jet pump body preferably has at least two main connection elements. The at least two main connection elements are preferably connected to the at least one gas line tied together. One of the at least two main connection elements is preferably connected to the at least one gas reservoir unit by the at least one gas line. One of the at least two main connection elements is preferably connected, in particular directly and/or without a gap, to the at least one gas reservoir line. One of the at least two main connection elements is preferably connected to the at least one combustion unit by the at least one gas line. One of the at least two main connection elements is preferably connected, in particular directly and/or without a gap, to the at least one burner line.

For example, the at least two main connection elements are designed as connection pieces. The at least one gas line can in particular be firmly connected to the at least one jet pump body, in particular to the at least two main connection elements, such as screwed, clamped, latched or welded. The at least one jet pump body preferably has at least one secondary connection element. The secondary connection element preferably forms a suction side, in particular a suction area, of the jet pump body. Preferably, the main connection elements each form a drive connection, which is intended to let the fuel gas as a drive medium into and out of the jet pump body. The fuel gas is preferably provided as the driving medium to entrain, in particular to pump, the recirculated gas when it passes through the jet pump body, in particular from one main connection element to the other, in particular on the secondary connection element, preferably in the suction region. The at least one secondary connection element is preferably connected to the at least one recirculated gas line. For example, the at least one secondary connection element is designed as a connecting piece. The at least one recirculated gas line can in particular be permanently connected to the at least one jet pump body, in particular to the at least one auxiliary connection element, such as screwed, clamped, latched or welded. The at least two main connection elements and the at least one secondary connection element in particular limit access from the outside to the at least one jet pump cavity through outer walls of the at least one jet pump body. The at least two main connection elements are preferably arranged opposite one another on the respective arranged at least one jet pump body. The at least one secondary connection element is preferably arranged on the at least one jet pump body, in particular along the at least one jet pump cavity from one of the at least two main connection elements to the at least one other main connection element, between the at least two main connection elements. The at least one secondary connection element is preferably arranged closer to the main connection element of the at least two main connection elements, which is connected to the gas reservoir line.

At least one nozzle element is preferably arranged in the at least one jet pump cavity on one of the at least two main connection elements, which is connected to the gas reservoir line. In particular, the jet pump cavity can be tapered on a side of the jet pump cavity that faces the main connection element, which is connected to the gas reservoir line, in order to form the at least one nozzle element. The at least one jet pump unit preferably comprises the at least one nozzle element.

The at least one recirculation heat exchanger unit is preferably arranged between the at least one nozzle element and the at least one main connection element, which is connected to the at least one gas reservoir line, in particular the at least one gas reservoir line, preferably on the nozzle element. The at least one recirculated heat exchanger unit is preferably designed to heat the compressed fuel gas with heat energy from the recirculated gas behind the main connection element, which is connected to the at least one gas reservoir line and in front of the at least one nozzle element, in particular on the main connection element, which is connected to the at least one Gas reservoir line is connected, facing side of the jet pump cavity to heat. The at least one recirculated heat exchanger unit is preferably arranged in the jet pump cavity on the main connection element, which is connected to the at least one gas reservoir line. The at least one recirculated heat exchanger unit can be designed to be integrated in the jet pump unit, in particular in the jet pump cavity. In particular, the at least one recirculated heat exchanger unit can be designed in one piece with the jet pump body. The to- at least one recirculated heat exchanger unit can be designed, for example, as a concentric tube system, as a suitably shaped plate heat exchanger and/or as a tube bundle. The at least one recirculated heat exchanger unit can be formed, for example, as a helical coil. In particular, the at least one recirculation heat exchanger unit can be designed as a plate heat exchanger, which in particular has different plates to which pipes in particular can be welded. The at least one recirculated heat exchanger unit is preferably connected to the recirculated gas line.

The at least one jet pump unit preferably comprises at least one jet nozzle element. The at least one jet nozzle element is preferably arranged in the at least one jet pump cavity in a central region of the jet pump cavity, in particular between the at least two main connection elements, which are in particular connected to the gas line. In particular, the jet pump cavity can be tapered in the central region of the jet pump cavity, in particular between the at least two main connection elements, which are connected in particular to the gas line, to form the at least one jet nozzle element. The at least one nozzle element is preferably arranged between the main connection element, which is connected to the gas reservoir line, and the jet nozzle element.

Due to the configuration of the jet pump device according to the invention, an advantageously high energy efficiency can be achieved when fuel gas is recirculated. In particular, an advantageous heating of the combustion gas before combustion can be achieved with thermal energy of the recirculate gas after combustion. An advantageous degree of efficiency can be achieved, which can be increased in particular independently of the overall system actually used, into which the jet pump device is integrated. In particular, an advantageous degree of efficiency can be achieved for fuel cells, electrolytic cells and/or turbomachines. In particular, a two-stage use of heat and power can be achieved, in particular, very favorable efficiencies can be achieved with simple and low-maintenance mechanics. Furthermore, it is proposed that the jet pump device has at least one further heat exchanger unit, which is arranged at a pump outlet of the jet pump unit and which is designed to heat the fuel gas with heat energy from the recirculated gas. The pump outlet of the jet pump unit is preferably an area of the jet pump cavity which faces the main connection element which is connected, in particular directly, to the combustion line. Preferably, the pump outlet of the jet pump unit is an area of the jet pump cavity, which extends from the main connection element, which is connected, in particular directly, to the combustion line, to the at least one jet nozzle element. The further heat exchanger unit is preferably arranged at least partially in the jet pump cavity. The further heat exchanger unit is preferably arranged between the at least one jet nozzle element and the at least one main connection element, which is connected, in particular directly, to the combustion line. The additional heat exchanger unit is preferably connected to the recirculated gas line. An advantageous heat input from the recirculated gas to the accelerated fuel gas can be achieved. In particular, the heat energy of the recirculated gas can advantageously be effectively transferred to the fuel gas, in particular the fuel gas mixture with the recirculated gas.

Furthermore, it is proposed that the jet pump device comprises at least one additional heat exchanger unit, which is designed to emit thermal energy of the recirculated gas to an area surrounding the jet pump device. The at least one additional heat exchanger unit is preferably connected to the recirculated gas line. The additional heat exchanger unit is preferably designed as a cooling fin unit. The additional heat exchanger unit is preferably connected between the further heat exchanger unit and the jet pump body, in particular the secondary connection element, to the recirculated gas line, in particular arranged on the recirculated gas line. An advantageous pressure of the recirculate gas can be achieved upon entry into the jet pump cavity. In particular, a pressure of the recirculated gas can be achieved which advantageously allows the fuel gas as a driving medium to efficiently entrain the recirculated gas, in particular special to pump. An advantageous temperature of the recirculate gas can be achieved upon entry into the jet pump cavity. In particular, a serial thermal energy transfer from the recirculated gas to the fuel gas can take place, which advantageously allows maximum utilization of the thermal energy of the recirculated gas for this arrangement, in particular by an entry before the fuel gas is accelerated, when the fuel gas is mixed with the recirculated gas and after the mixture has been accelerated of the fuel gas with the recirculated gas, so that advantageous pressure conditions and advantageous temperature conditions can be achieved at the outlet of the jet pump body.

Furthermore, it is proposed that the at least one recirculated heat exchanger unit is arranged in the at least one recirculated gas line upstream of the at least one further heat exchanger unit. The at least one recirculated heat exchanger unit is preferably arranged upstream of the at least one further heat exchanger unit in the at least one recirculated gas line. The at least one recirculated heat exchanger unit is preferably arranged in the at least one recirculated gas line along a gas flow through the recirculated gas line from the burner unit to the jet pump unit before the at least one further heat exchanger unit. An advantageously high heat transfer can take place through the recirculated heat exchanger unit to the compressed fuel gas.

It is also proposed that the at least one further heat exchanger unit is arranged in the at least one recirculated gas line upstream of the at least one additional heat exchanger unit. The at least one further heat exchanger unit is preferably arranged upstream of the at least one additional heat exchanger unit in the at least one recirculated gas line. The at least one further heat exchanger unit is preferably arranged in the at least one recirculated gas line along a gas flow through the recirculated gas line from the combustor unit to the jet pump unit before the at least one additional heat exchanger unit. An advantageously high heat transfer can take place through the recirculated heat exchanger unit to the accelerated fuel gas. Furthermore, it is proposed that the at least one recirculated heat exchanger unit, the at least one further heat exchanger unit and the at least one additional heat exchanger unit are designed for this, together transfer at least 50% of thermal energy, which the recirculated gas has above 0°C, to the fuel gas and transfer to an environment. “Thermal energy above 0°C” should preferably be understood to mean thermal energy of a substance which corresponds to a difference between two energies which the substance has at 0°C and at an operating temperature which is greater than 0°C. In particular, the heat energy above 0°C of the substance is energy which the substance emits when cooling down from the operating temperature to 0°C. For example, the thermal energy above 0°C of the substance is energy which the substance would give off if it were cooled from 610°C to 0°C. For example, the at least one recirculated heat exchanger unit, the at least one additional heat exchanger unit and the at least one additional heat exchanger unit together transfer thermal energy to the fuel gas and to an environment that corresponds to a cooling of the recirculated gas from 610°C to 260°C. For example, the at least one recirculated heat exchanger unit transfers heat energy to the compressed fuel gas, which corresponds to a cooling of the recirculated gas from 610°C to 533°C. For example, the at least one additional heat exchanger unit transfers heat energy to the accelerated fuel gas, which corresponds to a cooling of the recirculated gas from 533°C to 310°C. For example, the at least one additional heat exchanger unit transfers thermal energy to the surroundings of the recirculated gas line, which corresponds to a cooling of the recirculated gas from 310.degree. C. to 260.degree. An advantageously large proportion of available thermal energy in the recirculated gas can be used. In particular, an advantageous heat transfer from the recirculated gas to the fuel gas can be achieved, with the recirculated gas entering the jet pump body at an advantageous temperature and at an advantageous pressure. In particular, an advantageous pump line can be combined with an advantageously energy-efficient heating of the fuel gas.

It is also proposed that the at least one recirculated heat exchanger unit is designed to absorb at least 20% of the thermal energy that the at least one recirculated heat exchanger unit, which transfers at least one further heat exchanger unit and the at least one additional heat exchanger unit from the recirculated gas to the fuel gas and to the environment, and which has the recirculated gas in particular above 0°C, to the fuel gas. The at least one recirculated heat exchanger unit preferably transfers thermal energy to the compressed fuel gas, which transfers at least 10% of the thermal energy which the at least one recirculated heat exchanger unit, the at least one additional heat exchanger unit and the at least one additional heat exchanger unit transfer from the recirculated gas to the fuel gas and to the environment , is equivalent to. The at least one recirculated heat exchanger unit preferably transfers thermal energy to the compressed fuel gas which amounts to a maximum of 40%, preferably a maximum of 30%, of the thermal energy which the at least one recirculated heat exchanger unit, the at least one further heat exchanger unit and the at least one additional heat exchanger unit transfer from the recirculated gas to the Fuel gas and transferred to the environment corresponds. An advantageous heat input into the compressed, unaccelerated fuel gas can be achieved.

Furthermore, it is proposed that the at least one additional heat exchanger unit is designed to transfer at least 60% of the thermal energy which the at least one recirculated heat exchanger unit, the at least one additional heat exchanger unit and the at least one additional heat exchanger unit transfer from the recirculated gas to the fuel gas or the environment. and which the recirculated gas has, in particular, above 0°C, to be transferred to the fuel gas. The at least one additional heat exchanger unit preferably transfers thermal energy to the compressed, and in particular accelerated, fuel gas, which transfers at least 50% of the thermal energy which the at least one recirculated heat exchanger unit, the at least one additional heat exchanger unit and the at least one additional heat exchanger unit from the recirculated gas to the fuel gas and transferred to the environment corresponds. Preferably, the at least one recirculated heat exchanger unit transfers thermal energy to the compressed fuel gas which amounts to a maximum of 80%, preferably a maximum of 70%, of the thermal energy that the at least one recirculated heat exchanger unit, the at least one additional heat exchanger unit and the at least one additional heat exchanger unit from the recirculated gas the fuel gas and transferred to the environment corresponds. An advantageous heat input into the compressed and accelerated fuel gas can be achieved.

In addition, a jet pump system is proposed with at least one gas reservoir unit, with at least one combustion unit, with at least one compressor unit and with at least one jet pump device according to the invention. The jet pump system preferably includes the at least one gas line. The jet pump system is preferably designed as a fuel cell system, as an electrolytic cell system and/or as a turbomachine. Components that are compatible with one another can advantageously be used. In particular, an overall system with an advantageously high level of efficiency can be achieved.

In addition, a method is proposed for operating a jet pump device according to the invention. Preferably, in at least one process step, the compressed fuel gas from the gas reservoir unit is introduced into the jet pump unit, in particular through the gas reservoir line. The fuel gas can be compressed in at least one method step before being introduced into the jet pump unit. The compressed fuel gas is preferably heated in at least one method step in the jet pump unit by the recirculated heat exchanger unit, in particular before the compressed fuel gas is accelerated. The compressed fuel gas is preferably accelerated in at least one method step in the jet pump unit, in particular by the nozzle element, in particular by the jet nozzle element. The compressed and accelerated fuel gas is preferably heated in at least one method step by the additional heat exchanger. The compressed and accelerated fuel gas is preferably conducted into the combustor unit in at least one method step, in particular through the combustor line. The compressed and accelerated fuel gas is preferably burned for the most part in at least one process step in the combustion unit. Preferably, in at least one process step, a portion of the mostly burnt fuel gas is fed back into the jet pump unit as recirculated gas, in particular through the recirculated gas line. Preferably, in at least one step of transfer an amount of heat to the recirculate heat exchanger unit with the recirculate gas. In at least one method step, an amount of heat is preferably transferred from the recirculated gas to the further heat exchanger unit, in particular after the amount of heat has been transferred to the recirculated heat exchanger unit. In at least one method step, an amount of heat is preferably transferred from the recirculated gas to the additional heat exchanger unit, in particular after the amount of heat has been transferred to the recirculated heat exchanger unit and after the amount of heat has been transferred to the further heat exchanger unit. In particular, the method can also be used analogously to operate a turbomachine.

A heat exchanger unit can be arranged on a rotor in a turbomachine or integrated into the rotor. In at least one process step, a conveying energy is preferably transmitted mechanically through the rotor to the fuel gas. An advantageous compressor-free turbomachine can be achieved. In at least one method step, the rotor of the turbomachine is preferably operated in a high-temperature region of the turbomachine. In the case of an injector principle of the turbomachine, the turbomachine can be/are supplemented by variable or multi-injectors in order to modulate the output of the turbomachine. An advantageous transfer of thermal energy from the recirculated gas to the fresh fuel gas can be achieved, with pump efficiency of the jet pump unit being advantageously able to be maintained.

The jet pump device according to the invention, the jet pump system according to the invention and/or the method according to the invention should/should not be limited to the application and embodiment described above. In particular, the jet pump device according to the invention, the jet pump system according to the invention and/or the method according to the invention can have a number of individual elements, components and units as well as method steps that differs from the number specified here in order to fulfill a function described herein. In addition, in the ranges of values specified in this disclosure, values lying within the stated limits are also to be considered as disclosed and as arbitrarily replaceable. drawing

Further advantages result from the following description of the drawing. In the drawing an embodiment of the invention is shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into further meaningful combinations.

Show it:

Fig. 1 shows a jet pump system according to the invention with a jet pump device according to the invention in a schematic representation and rule

Fig. 2 an inventive method for operating a jet pump device.

Description of the embodiment

FIG. 1 shows a jet pump system 50. The jet pump system 50 comprises a jet pump device 10. The jet pump device 10 is designed for use on a fuel cell or on a turbomachine. For example, the jet pump system 50 is designed as a fuel cell. The jet pump system 50 includes a gas reservoir unit 12. The jet pump system 50 includes a combustion unit 14. The jet pump system 50 includes a compressor unit 16. The jet pump device 10 includes a jet pump unit 18. The jet pump device 10 is partially designed as a jet pump. In particular, the jet pump unit 18 is designed as the jet pump. The jet pump unit 18 is designed for accelerating fuel gas 15 . The jet pump unit 18 is designed to convey a compressed fuel gas 15 from the gas reservoir unit 12 to the combustor unit 14 . The jet pump system 50 includes a gas line 30. The gas line 30 connects the gas reservoir unit 12 to the combustor unit 14. The jet pump unit 18 is coupled to the gas line 30. The jet pump unit 18 is integrated into the gas line 30 . The gas line 30 has a gas reservoir line 32 and a combustor line 34 . The jet pump unit 18 is connected to the gas reservoir unit 12 by the gas line 30 . The jet pump unit 18 is connected to the combustion unit 14 by the gas line 30 . The gas reservoir line 32 connects the jet pump unit 18 to the gas reservoir unit 12. The combustor line 34 connects the jet pump unit 18 to the combustor unit 14.

The fuel gas 15 is stored in the gas reservoir unit 12 . The fuel gas 15 is in the form of methane, for example. The fuel gas 15 is, for example, at a low pressure level, in particular about 2 bar, in the gas reservoir unit 12. In particular, the fuel gas 15 can flow from the gas reservoir unit 12 through the gas line 30, in particular the gas reservoir line 32, into the jet pump unit 18.

The compressor unit 16 is partially arranged in the gas line 30 between the gas reservoir unit 12 and the jet pump unit 18 . The compressor unit 16 is designed to increase the pressure of the fuel gas 15 in the gas line 30, in particular in the gas reservoir line 32. For example, the compressor unit 16 is designed to increase the pressure of the combustion gas 15 fivefold. The compressor unit 16 is designed, for example, as a compressor unit, in particular as one or more compressors.

The jet pump device 10 comprises a recirculated gas line 20. The recirculated gas line 20 is designed, in particular arranged, for returning a proportion of the fuel gas 15 downstream of the combustion unit 14 as recirculated gas 25 back into the jet pump unit 18. The recirculated gas line 20 is partially designed as an exhaust gas line 46 from the combustor unit 14 .

The jet pump unit 18 includes a jet pump body 36. The jet pump body 36 can be cylindrical, for example. The jet pump body 36 defines a jet pump cavity 38. The jet pump Body 36 extends, in particular along a longitudinal axis 40 of jet pump body 36, through jet pump body 36. Longitudinal axis 40 of jet pump body 36 extends, for example, along a cylinder axis of cylindrical jet pump body 36.

The jet pump body 36 has two main connection elements 42, 42'. The two main connection elements 42, 42' are connected to the gas line 30. For example, the two main connecting elements 42, 42' are designed as connecting pieces. One of the two main connection elements 42, 42' is connected to the gas reservoir unit 12 by the gas line 30. One of the two main connection elements 42, 42', in particular a gas reservoir connection element 43, is connected to the gas reservoir line 32, in particular directly and/or without a gap. One of the two main connection elements 42, 42' is connected directly to the gas reservoir unit 12 by the gas reservoir line 32, in particular without the jet pump body 36. One of the two main connection elements 42, 42' is connected to the combustion unit 14 by the gas line 30. One of the two main connection elements 42, 42', in particular a burner connection element 45, is connected to the burner line 34, in particular directly and/or without a gap. One of the two main connection elements 42,

42' is directly connected to the burner unit 14 by the burner line 34, in particular without the jet pump body 36.

The gas line 30 is firmly connected to the jet pump body 36, in particular at the two main connection elements 42, 42′, for example plugged in and screwed fluid-tight.

The jet pump body 36 has a secondary connection element 44 . The secondary connection element 44 is connected to the recirculated gas line 20 . For example, the secondary connection element 44 is designed as a connecting piece. The recirculated gas line 20 is in particular firmly connected to the jet pump body 36, in particular to the auxiliary connection element 44, such as screwed fluid-tight, for example.

The two main connection elements 42, 42' and the secondary connection element 44 in particular each limit access from the outside to the jet pump pen cavity 38 through various outer walls 48, 48', 48'' of the jet pump body 36. The two main connecting elements 42, 42' are arranged on various base sides of the cylindrical jet pump body 36. The auxiliary connection element 44 is arranged on a casing outside of the cylindrical jet pump body 36 . The two main connection elements 42, 42' are arranged opposite one another, in particular in alignment with one another, on the jet pump body 36. The auxiliary connection element 44 is arranged on the jet pump body 36, in particular along the jet pump cavity 38 from one of the two main connection elements 42, 42' to the other main connection element 42, 42', between the two main connection elements 42, 42'.

The secondary connection element 44 is arranged closer to the main connection element 42, 42' of the two main connection elements 42, 42', which is directly connected to the gas reservoir line 32.

The secondary connection element 44 forms, in particular defined, in particular by its arrangement, a suction side 47, in particular a suction region, of the jet pump body 36. The main connection elements 42, 42' each form a drive connection, which are provided for the purpose of injecting and removing the fuel gas 15 as a drive medium to let the jet pump body 36. The fuel gas 15 is provided as a driving medium to entrain, in particular to pump, the recirculated gas 25 when passing through the jet pump body 36, in particular from one main connection element 42, 42' to the other, in particular on the auxiliary connection element 44, preferably in the suction region .

The jet pump unit 18 comprises a nozzle element 52. The nozzle element 52 is arranged in the jet pump cavity 38 on the gas reservoir connection element 43. The nozzle element 52 is arranged in the jet pump cavity 38 closer to the gas reservoir connection element 43 than to the combustor connection element 45 . The jet pump cavity 38 , in particular the jet pump body 36 , is tapered on a side of the jet pump cavity 38 that faces the gas reservoir connection element 43 in order to form the nozzle element 52 . The jet pump device 10 comprises a recirculated heat exchanger unit 22. The recirculated heat exchanger unit 22 is designed to heat the compressed fuel gas 15 with heat energy from the recirculated gas 25. The recirculated heat exchanger unit 22 is arranged between the nozzle element 52 and the gas reservoir connection element 43, in particular the gas reservoir line 32, preferably on the nozzle element 52, in particular in the jet pump cavity 38.

The recirculated heat exchanger unit 22 is designed to heat the compressed fuel gas 15 behind the gas reservoir connection element 43 and in front of the nozzle element 52, in particular on a side of the jet pump cavity 38 facing the gas reservoir connection element 43, using thermal energy from the recirculated gas 25. The recirculated heat exchanger unit 22 is arranged in the jet pump cavity 38 on the gas reservoir connection element 43 . The recirculated heat exchanger unit 22 is integrated into the jet pump unit 18, in particular in the jet pump cavity 38, and is arranged in particular. In particular, the recirculated heat exchanger unit 22 is connected to the jet pump body 36, for example welded, designed.

The recirculated heat exchanger unit 22 is designed, for example, as a concentric tube system, in particular a spiral line. The recirculated heat exchanger unit 22 is connected to the recirculated gas line 20 . In particular, the recirculated heat exchanger unit 22 forms part of the recirculated gas line 20.

The jet pump unit 18 comprises a jet nozzle element 54. The jet nozzle element 54 is arranged in the jet pump cavity 38 in a central area of the jet pump cavity 38, in particular between the two main connections 42, 42'. In particular, the jet pump cavity 38 is in the middle region of the jet pump cavity 38, in particular between the two main connection elements 42, 42', which are connected in particular to the gas line 30, for forming the jet nozzle element 54 tapered trained. The nozzle element 52 is preferably arranged between the gas reservoir connection element 43 and the jet nozzle element 54 .

The jet pump device 10 comprises a further heat exchanger unit 24. The further heat exchanger unit 24 is arranged at a pump outlet 56 of the jet pump unit 18. The additional heat exchanger unit 24 is designed to heat the fuel gas 15 with heat energy from the recirculated gas 25 . The pump outlet 56 of the jet pump unit 18 is a region of the jet pump cavity 38 which element 45 faces the burner connection element. The pump outlet 56 of the jet pump unit 18 is an area of the jet pump cavity 38 which extends from the burner connection element 45 to the jet nozzle element 54 . The further heat exchanger unit 24 is partially arranged in the jet pump cavity 38 . The additional heat exchanger unit 24 is arranged between the jet nozzle element 54 and the burner connection element 45 . The additional heat exchanger unit 24 is designed, for example, as a concentric tube system, in particular a spiral line. The additional heat exchanger unit 24 is connected to the recirculated gas line 20 . In particular, the further heat exchanger unit 24 forms part of the recirculated gas line 20. The jet nozzle element 54 and the nozzle element 52 are designed to accelerate the fuel gas 15. In particular, the jet nozzle element 54 is designed to accelerate the fuel gas 15 with the recirculated gas 25 .

The jet pump device 10 includes an additional heat exchanger unit 26. The additional heat exchanger unit 26 is designed to emit thermal energy of the recirculated gas 25 to an environment 28 of the jet pump device 10. The additional heat exchanger unit 26 is connected to the recirculated gas line 20 . The additional heat exchanger unit 26 is designed as a cooling fin unit. The additional heat exchanger unit 26 is connected between the further heat exchanger unit 24 and the jet pump body 36 , in particular the auxiliary connection element 44 , to the recirculated gas line 20 , in particular arranged on the recirculated gas line 20 .

The recirculated heat exchanger unit 22 is arranged in the recirculated gas line 20 before the further heat exchanger unit 24 . The recirculated heat exchanger unit 22 is in the recirculated gas line 20 in terms of flow before the other Heat exchanger unit 24 arranged. The recirculated heat exchanger unit 22 is arranged in the recirculated gas line 20 along a gas flow through the recirculated gas line 20 from the burner unit 14 to the jet pump unit 18 before the further heat exchanger unit 24 .

The additional heat exchanger unit 24 is arranged in the recirculated gas line 20 before the additional heat exchanger unit 26 . The additional heat exchanger unit 24 is arranged in the recirculated gas line 20 upstream of the additional heat exchanger unit 26 in terms of flow. The further heat exchanger unit 24 is arranged in the recirculated gas line 20 along the gas flow through the recirculated gas line 20 from the combustor unit 14 to the jet pump unit 18 before the additional heat exchanger unit 26 .

The geometry of the recirculated heat exchanger unit 22 means that the recirculated heat exchanger unit 22 is designed to heat the compressed fuel gas 15 with heat energy from the recirculated gas 25 . The recirculated heat exchanger unit 22, the further heat exchanger unit 24 and the additional heat exchanger unit 26 are designed, in particular due to their respective geometry and/or arrangement, to together transfer at least 50% of the thermal energy that the recirculated gas 25 has above 0°C to the Combustion gas 15 and transferred to the environment 28.

For example, the recirculated heat exchanger unit 22, the further heat exchanger unit 24 and the additional heat exchanger unit 26, in particular due to their respective geometry and/or arrangement, are designed to transfer heat energy together to the fuel gas 15 and to the environment 28, which cools the Recirculated gas 25 from 610°C to 260°C. For example, the recirculated heat exchanger unit 22, in particular a geometry and/or arrangement of the recirculated heat exchanger unit 22, is designed to transfer thermal energy to the compressed fuel gas 15, which corresponds to a cooling of the recirculated gas 25 from 610° C. to 533° C. For example, the additional heat exchanger unit 24, in particular a special geometry and/or arrangement of the additional heat exchanger unit 24, is designed to transfer thermal energy to the accelerated fuel gas 15, which cools the recirculated gas 25 from 533°C corresponds to 310°C. For example, the additional heat exchanger unit 26, in particular a geometry and/or arrangement of the additional heat exchanger unit 26, is designed to transfer thermal energy to the surroundings 28 of the recirculated gas line 20, which cools the recirculated gas 25 from 310° C. to 260° corresponds to C.

The recirculated heat exchanger unit 22 is designed to transfer at least 20% of the heat energy, which the recirculated heat exchanger unit 22, the further heat exchanger unit 24 and the additional heat exchanger unit 26 transfer from the recirculated gas 25 to the fuel gas 15 and to the environment 28, in particular per unit of time, to the fuel gas 15 transferred to.

The recirculated heat exchanger unit 22 is designed to transfer thermal energy to the compressed fuel gas 15, which is at least 10% of the thermal energy that the recirculated heat exchanger unit 22, the additional heat exchanger unit 24 and the additional heat exchanger unit 26 from the recirculated gas 25 to the fuel gas 15 and to the Environment 28 transmitted, in particular per unit of time corresponds.

The recirculated heat exchanger unit 22 is designed to transfer thermal energy to the compressed fuel gas 15, which is a maximum of 40%, in particular a maximum of 30%, of the thermal energy that the recirculated heat exchanger unit 22, the additional heat exchanger unit 24 and the additional heat exchanger unit 26 from the recirculated gas 25 transferred to the fuel gas 15 and the order environment 28 corresponds. The additional heat exchanger unit 24 is designed to transfer at least 60% of the heat energy, which the recirculated heat exchanger unit 22, the additional heat exchanger unit 24 and the additional heat exchanger unit 26 transfers from the recirculated gas 25 to the fuel gas 15 or the environment 28, in particular per unit of time, to the fuel gas 15 to transfer. The additional heat exchanger unit 24 is designed to transfer thermal energy to the compressed, and in particular accelerated, fuel gas 15, which transfers at least 50% of the thermal energy that the recirculated heat exchanger unit 22, the additional heat exchanger unit 24 and the additional heat exchanger unit 26 from the recirculated gas 25 to Fuel gas 15 and transmitted to the environment 28, in particular per unit time, corresponds. The re- Circulate heat exchanger unit 22 is designed to transfer thermal energy to the compressed fuel gas 15, which amounts to a maximum of 80%, preferably a maximum of 70%, of the thermal energy that the recirculate heat exchanger unit 22, the additional heat exchanger unit 24 and the additional heat exchanger unit 26 transfer from the recirculate gas 25 to the fuel gas 15 and transmitted to the environment 28, in particular per unit of time.

When the recirculated gas 25 enters the jet pump unit 18, the recirculated gas 25 mixes with the, in particular fresh, fuel gas 15 to form fuel gas 15 for the combustor unit 14.

Figure 2 shows a method for operating the jet pump device 10.

The method includes a continuous operation step 58, in which the jet pump device 10, in particular the jet pump system 50, is operated. For a simplified understanding, the individual parts of the continuous operation step 58 running in parallel are explained below as individual process steps. In at least one method step, in particular an initiation step 60, the fuel gas 15 is introduced from the gas reservoir unit 12 into the jet pump unit 18, in particular through the gas reservoir line 32.

The fuel gas 15 can be compressed in at least the introduction step 60 before being introduced into the jet pump unit 18 . In at least one method step, in particular initiation step 60, the combustible gas 15 compressed in particular by the compressor unit 16 and/or from the gas reservoir unit 12 is heated in the jet pump unit 18 by the recirculated heat exchanger unit 22, in particular before the compressed combustible gas 15 is accelerated In at least one method step, in particular an acceleration step 62, the compressed fuel gas 15 is accelerated in the jet pump unit 18, in particular by the nozzle element 52, in particular by the jet nozzle element 54. In at least one method step, in particular the acceleration step 62, the compressed and accelerated Combustion gas 15 is heated by the additional heat exchanger unit 24 . In at least one method step, in particular the acceleration step 62, the compressed and accelerated combustion gas 15 is passed into the combustion unit 14, in particular through the combustion line 34. In at least one method step, in particular a combustion step 64, the compressed and be accelerated fuel gas 15 is burned in the combustion unit 14 for the most part. In at least one method step, in particular the combustion step 64, a proportion of the mostly burned fuel gas 15 is fed back into the jet pump unit 18 as recirculated gas 25, in particular through the recirculated gas line 20. In at least one method step, in particular a heat utilization step 66, in at least a step of the Rezir kulatgas 25 carry an amount of heat to the recirculation heat exchanger unit 22 on. In at least one process step, in particular the heat utilization step 66, an amount of heat is transferred from the recirculated gas 25 to the further

Transferred heat exchanger unit 24, in particular after a transfer of the amount of heat to the recirculated heat exchanger unit 22 from the same molecules of the recirculated gas 25. In at least one method step, in particular the heat utilization step 66, an amount of heat is transferred from the recirculated gas 25 to the additional heat exchanger unit 26, in particular after the amount of heat has been transferred to the recirculated heat exchanger unit 22 and after the amount of heat has been transferred to the further heat exchanger unit 24 by the same molecules of the recirculated gas 25. In particular, the method can be used analogously to the operation of a turbomachine.

Claims

Expectations

1. Jet pump device with at least one jet pump unit (18) for conveying a compressed fuel gas (15) from at least one gas reservoir unit (12) to at least one combustor unit (14), with at least one recirculated gas line (20) for returning part of the fuel gas ( 15) after the at least one burner unit (14) as recirculated gas (25) back into the jet pump unit (18), characterized by at least one recirculated heat exchanger unit (22), which is designed to convert the compressed fuel gas ( 15) to heat.

2. Jet pump device according to claim 1, characterized by at least one further heat exchanger unit (24) which is arranged at a pump outlet (56) of the jet pump unit (18) and which is designed to heat the fuel gas ( 15) to heat.

3. Jet pump device according to claim 1 or 2, characterized by at least one additional heat exchanger unit (26) which is designed to deliver thermal energy of the recirculated gas (25) to a surrounding environment (28) of the jet pump device (10).

4. Jet pump device according to claim 2, characterized in that the at least one recirculated heat exchanger unit (22) is arranged in the at least one recirculated gas line (20) upstream of the at least one further heat exchanger unit (24).

5. Jet pump device according to claims 2 and 3, characterized in that the additional heat exchanger unit (24) is arranged in the at least one recirculated gas line (20) upstream of the additional heat exchanger unit (26).

6. Jet pump device according to Claims 1, 2 and 3, characterized in that the at least one recirculated heat exchanger unit (22), the at least one further heat exchanger unit (24) and the at least one additional heat exchanger unit (26) are designed to together have at least 50% of one Heat energy, which the recirculated gas (25) has above 0 ° C to transfer to the fuel gas (15) and a surrounding environment (28).

7. Jet pump device according to Claims 2 and 3, characterized in that the at least one recirculated heat exchanger unit (22) is designed to transfer at least 20% of the heat energy which the at least one recirculated heat exchanger unit (22), the at least one further heat exchanger unit (24) and the at least one additional heat exchanger unit (26) from the recirculated gas (25) to the fuel gas (15) and to the environment (28) to transfer to the fuel gas (15).

8. Jet pump device according to Claims 2 and 3, characterized in that the at least one additional heat exchanger unit (24) is designed to absorb at least 60% of the heat energy which the at least one recirculated heat exchanger unit (22), the at least one additional heat exchanger unit (24) and the at least one additional heat exchanger unit (26) from the recirculated gas (25) to the fuel gas

(15) or the environment (28) transferred to carry on the fuel gas (15).

9. Jet pump system with at least one gas reservoir unit (12), with at least one combustion unit (14), with at least one compressor unit

(16) and with at least one jet pump device (10) according to one of Claims 1 to 8.

10. Method for operating a jet pump device (10) according to one of claims 1 to 8.