Power generation system and method of generating power using such power generation system

专利摘要:
A power generation system comprising: - a fluid pump section (4) including a rotating fluid pump (7) having an impeller in which a working fluid is pressurized and driven by a drive shaft (8); - an evaporator section comprising an evaporator (9) in which the pressurized working fluid is at least partially evaporated by the application of heat; - an expansion section (3) comprising a rotary expansion machine (11) with an inlet port (16) and a rotary expansion element in which the evaporated working fluid is expanded; and - a generator section (5) comprising a rotating power generator (13) with a rotor, the expansion section (3), the liquid pump section (4) and the generator section (5) being rotatably connected so that relative rotational speed ratios between the rotating expansion element, the impeller and rotor are mechanically maintained, characterized in that the drive shaft (8) driving the impeller is configured to be provided with a throttle device through which a controlled portion (15) of the working fluid entering the liquid pump (7) from the liquid pumping section (4) goes to the expansion section (3) and / or the generator section (5).
公开号:BE1027172B1
申请号:E20195300
申请日:2019-05-07
公开日:2020-11-05
发明作者:Henrik Öhman；Anton Jan GOETHALS
申请人:Atlas Copco Airpower Nv；
IPC主号:

专利说明:

Power generation system and method for the | Generating power by using such a system | for power generation. | The present invention relates to a system for | power generation comprising an expansion section to sen | the working fluid, a liquid pump section to pressurize this working fluid and a generator section, 9 where the expansion section, the liquid pump section and the generator 9 section are rotatably connected in such a way that the relative rotational speed ratios between the expansion section, the fluid pump section and the 9 # generator section are mechanically maintained.
In particular, the power generation system further comprises a semi-hermetically sealed housing containing all rotating parts of the expansion section, fluid pump section and the generator section, but the power generation system is not limited thereto. It is known in the LS that power is generated in expansion machines by converting the energy associated with the pressure of a working fluid into mechanical kinetic energy of an expansion machine that is a turbine or the like with a rotor, a piston, or the like. This kinetic energy can be further converted into electrical energy in a rotating power generator having a rotor rotatably connected to the expansion machine by means of a shaft, coupling, transmission, belt, or the like. The expansion machine
; 2 can be powered with a working fluid that is circulated in a closed loop known as the Rankine cycle or Rankine cycle., This closed | circuit is provided with a liquid pump to successively circulate the working fluid through an evaporator section comprising one or more evaporators | wherein the working fluid from the liquid pump is at least partly converted into gas or vapor under high pressure; | - the expansion section: - a condenser section comprising one or more condensers 9 connected to a refrigerant circuit with refrigerant, | e.g. water or air, for complete condensation of the working fluid into fluid which is recirculated by the fluid pump for a subsequent cycle. To close the Rankine cycle, an outlet of the fluid pump section is in fluid communication with an inlet of the evaporator section, an outlet of the evaporator press section in viable connection with an inlet of the expansion section, is an outlet of the expansion section in liquid communication with the inlet of the condenser section, and is an outlet of the condenser in reversible connection with an inlet of the liquid plug section.
The working fluid can be selected as an organic working fluid, the Rankine cycle being known by the name of Organic Kankin cycle or OPC. A disadvantage of organic working fluids is that they are usually explosive, toxic or expensive. As a result, mechanical shaft seals are required where rotating parts of a rotary expansion machine and / or rotating
| power generator penetrate the housing containing the working fluid around the rotor of the expansion machine | respectively the generator and they are in contact with the | escape air.
Such mechanical seals are expensive and generally require extensive maintenance. A common way to avoid the use of mechanical seals between the working fluid and the | ambient air, is to design compact "sem- 9 10 hermetic" oË "integrated" combinations of the expansion engine and the power generator.
With "semi-hermetic" or "integrated" combinations of an expansion engine and a power generator, a combination of an expansion engine and a power generator is covered in a housing in which all rotating parts of the expansion engine and generator are completely enclosed by the housing and thus insulated. of contact with the ambient air, Examples of semi-hermetic or integrated combinations of an expansion machine and a generator are described inter alia in US 4,185,465 on DE 10 2012 016 488, EP 0004609 shows a semi-hermetic combination of a scrubber expansion machine, a screw compressor and a electric motor in a coolant as a working fluid.
JP H 05195808 and CN 2056290297 Loner integrated combinations of an expansion engine, a generator and a vice nomp.
One drawback of integrated combinations of an expansion machine, a generator and a liquid pump is the prevention of unwanted internal leakage of the working fluid into the housing between the expansion section and the
: expansion engine, the generator section with the generator and the | fluid gum section with the vice fluid pump, due to the occurrence of significantly different pressure levels of the working fluid in these sections of the housing.
Such internal leaks not only reduce the efficiency of the; power generation, but also the reliability of the 3 power generation system due to violent sudden 9 evaporation when the working fluid is in a mixed viosible | gaseous or mixed liquid-vapor form. In addition, cavitation cop occurs in the vice pump when | vapor of the high pressure working fluid leaks from the expansion section or generator section to the liquid pump. 9 Furthermore, large amounts of vice may leak from the liquid pump through the liquid pump drive shaft to the condenser without passing the evaporator, resulting in a lower energy generation efficiency, where “power generation efficiency” is defined as the ratio of mechanical energy generated in the expansion section in relation to the sum of the heat transferred in the evaporator to the working fluid and the work supplied to the viscous fluid pump.
Alternatively, proper seals of the fluid tip drive shaft to prevent leakage of the fluid tip through the drive shaft are subject to wear and require unwanted maintenance. In addition, if the generator is a permanent magnet generator, the magnets of this generator can be permanent magnet suffer from insufficient cooling due to the compact size of the integrated combination
5, from the expansion machine, generator and liquid pump, resulting in permanent performance damage. 9 EF à 386 727 describes a power generation system Which is designed as a Rankiner cycle comprising a turbo expansion engine including an integrated combination of | expansion section, a liquid pump section and a motor | generator section, wherein the engine generator section is cooled by a portion of the working fluid passing through the | The drawback of this system design is that the generator is internally exposed to the high pressure of the working fluid at the flap of the liquid pump section, which can cause permanent damage to the rotor and other internal parts of the generator. .
WO 8Z / 02741 describes a Rankine cycle turbine regenerator system with an integrated combination of an expansion section, a liquid pump section and generator torch section on a single vertical axis in a hermetically sealed housing, with part of the working fluid coming from the condenser by a booster pump upstream of the fluid pump section is rumbled to the shaft bearings for lubrication and kceling.
The cooling of the generator is achieved by leakage of the working fluid from the upper bearing assembly and a vice pump into the fluid pump section., The disadvantage of this system is the need for a booster pump, in addition to the fluid hull, to pressurize the part of the working fluid. which is used for lubricating and chilling the iagers, to prevent evaporation of said part of the
€ working fluid and the production of vapor in the bearing hollows due to the addition of small amounts of heat causing the correct functioning of the Éluidum as a hydrodynamic | lubricant in the bearings.
In addition, the | 5 rotor and other internal parts of the power generator {again affected by the high pressure of the working fluid in | the spaces between the bearings and at the outlet of the liquid pumping section. The object of the present invention is to provide a solution to one or more of the above and / or 9 other disadvantages. To that end, the invention relates to on a power generation system comprising: - a vice pump section comprising a rotary vice pump having an impeller in which a working fluid is pressurized and driven by a drive shaft; - an evaporator section comprising an evaporator in which the working fluid pressurized in the rotary vice pump is at least partly evaporated by the supply of heat from a heat source; the expansion section comprising a rotary expansion machine with an inlet port and a rotary expansion element in which the working fluid at least partially vaporized in the evaporator section is expanded; and - server section comprising a rotary power generator having a rotor, wherein the expansion section, the liquid pump section and the generator section are rotatably connected in such a way that the relative rotational speed ratios between the rotary power generator element of the rotary expansion machine, the impeller of the rotary liquid pump and the rotor of the 9 the movable power generator is mechanically maintained | stay, | 5 characterized in that the drive shaft driving the impeller of the rotary liquid pump is configured to be | be fitted with sen smoortoestez: so that a controlled part of the working fluid that the rotating | liquid pump enters from the liquid pump section to the expansion section and / or the generator section.
9 An advantage of the power generation system according to the invention, when the controlled part of the working fluid runs from the liquid pump section to the generator section, is the possibility to connect the rotary liquid pump of the vice pump section directly to the rotor of the rotary power generator, while allowing cavitation of the the rotary liquid pump because of the Leakage of working fluid vapor in the rotary liquid pump is prevented, and loss of the power generation efficiency is prevented because of large amounts of working fluid coming directly from the rotary liquid pump but the rotating power generator flow without passing through the evaporator, The small controlled part of the working fluid passed through the throttling unit and passing from the liquid pump section to the generator section is just enough to keep the rotary power generator cooled to a suitable level, mainly by local evaporation. The rotating power generator is exposed to a pressure of the working fluid that is lower than the pressure of the working fluid at an outlet of the working fluid.
: 3 | liquid pump section, which prevents damage to the rotor or other internal parts of the rotating | power generator due to too high a pressure of the working fluid.
An advantage of the power generation system according to the invention as the controlled portion of the working fluid 9 runs from the liquid pump section to the expansion section, is the ability to remove the rotating liquid pump from the
12 fluid pump section connects directly to the rotor of the rotary expansion machine, while = preventing cavitation of the rotary fluid pump due to the leakage of working fluid vapor into the rotary fluid pump, and loss of the power generation efficiency is prevented due to growing amounts of working fluid directly from the rotary fluid pump to the rotary expansion machine without going through the evaporator.
The small controlled portion of the working fluid passed through the throttle unit that passes from the fluid pump section to the expansion section is just enough to keep the bearings and other rotating parts of the rotary tensioning machine cooled to a suitable level, mainly through local evaporation.,
An additional advantage is that if the rotating power generator is a permanent magnet generator and if the controlled portion of the working fluid passed through the throttle coefficient runs from the vice pump section to the generator section, this
The controlled portion of the working fluid can be used to cool the magnets of the rotating power censerator. | in a preferred embodiment of the invention, | 5 the power generation system set up as Rankine- | cycle, preferably an ORC cycle with an organic working fluid. In another preferred embodiment of the invention, the inlet port of the rotary expansion machine of the expansion section is in a higher position # than an outlet port of the said rotary expansion machine.
In addition, the rotary vice pump is in a lower position than the inlet port of the rotary expansion machine.
This has the advantage that expanded working fluid in a mixed vice-vapor phase can exit the rotary tensioning machine without pumping losses caused by an internal upward movement of mixed phase working fluid.
The invention can be used for an integrated combination of a single expansion section, one single fluid punch section, and a generator section.
However, the invention can also be used for an integrated combination of two or more expansion sections, two or more vice-pump sections and a generator section. Each of the expansion or liquid pump sections can include several rotary expansion machines or rotary liquid pumps, respectively.
The invention also relates to a method for generating power by means of a system for | power generation, the power generation system | including: 9 5 - a liquid pump section comprising an inlet and a rotating hydrogen pump with an impeller in which a 9 working fluid is pressurized and driven: with a drive shaft: 9 - an evaporator section comprising an evaporator in which the F 10 in the rotary pressurized working fluid pump 9 is at least partially vaporized by the application of heat from a heat source; # - an expansion section comprising a rotary expansion machine and a rotary expansion element in which the least amount of working fluid evaporated in the evaporation section is expanded; and - a generator section comprising a rotary power generator having a rotor, wherein the expansion section, the liquid pump section and the generator section are rotatably connected in such a way that relative rotational speed ratios are looped between the rotary expansion element of the rotary expansion machine, the impeller of the rotary vine hull and the rotor. of the rotary power generator are maintained mechanically, characterized in that a controlled portion of the working fluid entering the rotary liquid pump is passed from the vice hull section to the expansion section and / or the generator gear by means of a throttle set, the drive shaft of which controls the impeller of the rotary liquid pump is provided,
wherein the reactive expansion engine and / or rotary power generator are cooled by the controlled | part of the working fluid from the vice pump section to | the expansion section and the generator section respectively. 9 in a preferred embodiment of the invention is a mass bleed of the controlled portion of the working fluid | allowed by the throttle device from the 9 liquid pump section to the expansion section and / or the 9 10 generator section less than 25%, preferably less than 10%; still far less than 5%, and most preferably less than 3% of a total mass flow rate of the working fluid supplied to the inlet of the fluid pump section. In this way, the controlled part of the working fluid is just enough to keep the reactor and other parts of the rotary power generator, respectively the bearings and other rotating parts of the rotary expansion machine cooled to a suitable level, mainly by local evaporation.
With the intention to better understand the features of the invention, some preferred embodiments of a power generation system according to the invention in which the rotary liquid pump drive shaft is exemplified are described, without limitation, referring to the accompanying drawings, in which: Figures 1A and 1B are a schematic representation of a Fankiner cycle including a power generation system according to the invention;
: Figures 2 to 5 each show a different variant of the power sensor generation system; figure & show in more detail a seal: of a drive shaft of a rotary liquid pump of the system ì FOR power generation. : In this case, the power generation system is 1 in figure; 1A a Rankine cycle comprising an integrated combination # 10 2 of an expansion section 3, a vice cluster section 4 and a 9. Generator section 5 Preferably mine all rotating parts of the expansion section 3 and the generator section 5 and preferably also the vine substance gum section 4 enclosed by a semi - hermetically sealed housing 6. A rotating visistcipomg 7 in the liquid pump section 4 propels the working fluid through the kringicop by means of a rotary impeller driven by a drive shaft 3 of the rotary vinegar pump 7, The rotary vice pump 7 may be a rotary displacement pin, preferred gear pump.
The flow of the working fluid through the crimp loop is as follows. The rotating fluid pump 7 propels the working fluid in liquid form through a evaporator section comprising an evaporator 3 forming the first part of a heat exchanger 10. A heating means that takes heat from a heat source. flows through a second part of the heat exchanger 10, preferably countercurrently relative to the working fluid flowing through the evaporator © | flows. {5 The heat source can be residual heat from a process installation {such as a compressor installation, such that the power generation system 1 is an installation for conversion of | residual heat into capacity, whereby recovered residual heat 9 is converted into mechanical or electrical energy, 9 10 The working fluid evaporates at least partly in the evaporator 9 due to the heat transfer from the heating medium to the working fluid and it leaves the evaporator 9 in a gaseous or vapor form state or as a mixture of viscous substance and gas or vapor.
The working fluid is generally characterized by a more favorable evaporation property, namely the boiling temperature at the pressure of the working fluid in the evaporator% with respect to the temperature of a heating means that provides heat to the working fluid in the evaporator 5. The lower the boiling temperature of the working fluid in the evaporator. evaporator 3, the better and more efficiently heat is transferred: to the working fluid by a heating means at Low temperature.
Typically, a working fluid is selected whose critical point temperature is close to a maximum temperature of the heating means in the heat exchanger 15.
Furthermore, the working fluid may comprise a lubricant or serve as a lubricant for components of the power generation system 1. An example of a suitable organic working fluid is 1, 1, 9, 1, 3, 3-pentalluoropropane. However, the invention is not limited to this particular working fluid. F The at least partially evaporated working fluid exiting the evaporator 9 3 is expanded in a rotary expansion machine 11 in the expansion section 3. The rotary 9 expansion machine 11 is configured so that thermal energy of the working fluid can be converted into mechanical energy, for example because it is constructed is in the form of a rotary expansion element driven by an output drive shaft 12 coupled to a rotor of a rotary power generator 13 in the generator section 5 to supply a consumer with electrical energy.
220 The rotary expansion machine 11 in the expansion section 3 may be a displacement rotary expansion machine, preferably a twin screw rotary expansion machine. The rotating power generator 13 in the generator section 5 may be a synchronous generator, preferably a permanent magnet generator.
The expanded working fluid leaving the expansion section 3 flows through a condenser section falling over a condenser 1d where it contacts and is cooled by a refrigerant, causing the working fluid to be completely
[condenses to be pumped around as liquid by 9 the rotating liquid nozzle 7 for another cycle in the | Rankine Circle.
{S A controlled portion 15 of the working fluid entering the rotary fluid pump 7 is leaked from the 9 fluid pump section 4 to the generator section 5 via a | throttle device provided on the drive shaft 8 which drives the impeller 9 of the rotary liquid pump 7. This controlled portion of the working fluid 15 overflows and through the rotating power generator 13. In this manner, the rotor and other parts of the rotating power generator 13 are cooled sufficiently.
As shown in figure 15, the position of the expansion section 3 and the generator section 5 can be interchanged in the housing 6, such that the controlled part 15 of the working fluid leaks to the expansion section 3 through the throttling device provided on the drive shaft &. of the rotary fluid pump 7. The controlled part 15 of the working fluid is furthermore used for cooling Bearings and other parts of the rotary expansion machine. It is not excluded that the controlled part 15 of the working fluid in Figs. 1A and / or 1B can be both flows through the expansion section 3 as through the generator section 5 and is used to cool both the parts of the rotary expansion machine 11 and the parts of the generator 13,
; The expansion zone 3, the fluid pump section 4 and the generator section 5 are rotatably connected in such a way that | way that relative rotational speed ratios between the | rotary expansion element of the rotary expansion machine | 5 il, the impelier of the rotary liquid pump 7 and the rotor 9 of the rotary power generator 13 mechanical | be maintained. 9 This can be accomplished by the rotary expansion element of F the rotary tensioning machine 11, the impeiler of the rotary fluid flow 7, the rotor of the rotary power generator 9 13, the drive shaft 8 of the rotary fluid punch 7 and the | drive shaft 12 of the rotary power generator 13 Le | connection by means of gearboxes. However, the rotary expansion element of the rotary expansion machine 11 and / or the imelier of the rotary liquid pump 7 can be mounted directly on the drive shaft 8.
Similarly, the rotary expansion element of the rotary expansion machine 11 and / or the rotor of the rotary power generator 13 can be mounted directly on the drive shaft 12.
In a variant of the invention, the rotating expansion element li is mounted on the drive shaft 8 which drives the impeller of the rotating liquid pump 7.
Furthermore, the rotary expansion element of the rotary expansion machine 1 can be mounted on the drive shaft 12 which drives the rotor of the rotary power generator 13. The drive shaft 8 which drives the impeller of the rotary liquid pump 7 may be different from the drive shaft 12 which drives the the rotor of the rotating power generator 13, for example when the impeller of the rotating power generator 7 is driven by a drive shaft 8 which is connected to a male rotor element of the rotating power generator. The SS expansion machine 11 and the rotor of the rotary power 9 generator 13 is driven by a sand drive 9 12 which is connected to a female rotor element of the rotary expansion machine 11 or vice versa. As alternative 9, the rotor of the rotary power generator 13 can be used. 10 driven by the same drive shaft as the impeller of the | rotating liquid pump 7, such that drive shafts 8 and 12 9 become one and the same drive shaft.
Various configurations are possible for the positioning and orientation of the expansion section 3, the vice pump section 4 and the generator section 5 within the semi-hermetically sealed housing 6, as indicated in Figures Z to 5.
Figure 2 is a schematic representation of a combination of an expansion section 3, a generator section 5 and a liquid pump section 4, these sections being vertically mounted and rotatably connected in such a way that the relative rotational speed ratios between the rotary expansion element of the rotary expansion machine il, the rotor of the rotary vice pump 7 and the rotor of the rotary power generator 13 are mechanically maintained. The controlled deal 15 of the working fluid flows from the vice-fluid [ump section to the generator section 5 for cooling the rotor and the other internal parts of the rotary power generator 13.
; The rotary expansion machine 11 of the expansion section 3 is provided with an inlet port 16 which has a higher position | then the outlet port 17 of this rotary expansion machine {Li.
The rotary liquid pump 7 of the liquid pump section | > 4 is in a lower position than the inlet port 16 of the 9 rotary expansion machine 11 to prevent cavitation # of the rotary liquid pump 7 and the resulting 9 pump losses due to an internal upward movement of 9 mixed phase working fluid and backflow of gaseous $ 10 or vapor-forming working fluid from the rotary expansion machine 9 11 to the rotary liquid pump 7. Figure 3 shows a variant of the combination in Figure 2, in which the positions of the expansion section 3 and the generator section 5 are interchanged, such that the controlled part of the working fluid that is, the throttle set provided on the drive shaft & of the rotating fluid pumps 7 of the fluid pump section 4 flows to the expansion section 3 for cooling the bearings and other rotating parts of the rotary expansion machine 11. Figure 4 shows a variant of the combination in Figure 2, where the expansion section 3, the generator section 5 and the vi liquid pump section 4 are mounted horizontally.
Fig. 59 shows a variant of the combination of an expansion action 3, a generator section S and a nitrogen pump section 4 in Fig. 4, in which the positions of the expansion section 3 and the generator section S are reversed.
1% {Figure 6 shows that the controlled portion 15 | of the working fluid is throttled and leaks via the drive shaft 8 of the rotating vineyard fuselage 7 of the | liquid pump section 4 at a pressure level pl to one of the | > expansion section 3 and the generator section 5 at a pressure level 9 p £ which is lower than pl.
In this case, the choke device is | a gap between the drive shaft 8 on which the impeller of the rotary liquid pump 7 is mounted and a seal 9 18 of this drive shaft 8 between the liquid pump section 4 and one of the expansion section 3 and the generator section 5. The controlled part 15 of the working fluid which is passed from the vice pump section & to the expansion section 3 or the generator section 5 by the throttle device, of which the drive shaft 8 driving the impeller of the rotary liquid fuselage 7 is provided, can be used for cooling the retroactive expansion machine 11 or the rotary power generator 13 in a method of generating power with the power generation system 1 according to the invention.
In this method, the inlet port 16 of the rotary expansion machine 11 in the expansion section 3 is supplied with at least partially evaporated working fluid from the evaporator 2 in the evaporator section.
The rotor of the rotary power generator 13 is cooled by and subjected to working fluid with a pressure level higher than a pressure level of the working fluid at an inlet of the vice pump section 4 and less than a 32 pressure level of the working fluid at an outlet of the fluid pump section 4, While the temperature of the working fluid cooling the rotating power generator 13: 9 Loensemt during cooling, this working fluid may evaporate 9 such that the rotor of the rotating power generator 12 9 is bicotified to a mixture of liquid and gaseous | 5 or danpform is working fluid. 9 The mass throne of the controlled part 15 of the | working fluid is only a small fraction of the 9 total mass flow of the working fluid being supplied 9 lu at the inlet of the liquid pump section 4, preferably less than 25%, more preferably less than 10%, even more preferably less than 5%, and preferably lacer than 3%. The present invention is by no means limited to the embodiments exemplified and illustrated in the drawings, but a power generation system and method of generating power with such a power generation system according to the invention can be realized in a variety of shapes or sizes without Beyond the scope of the invention, the expansion also applies to a power generation system with more than one expansion section or fluid pump section or power generation system comprising an expansion section with more than one rotary expansion machine or a liquid pump section with more than one rotary vice pump.

权利要求:
Claims (3)
[1]
| Claims, Le A power generation system comprising: a fluid pump section (4) comprising a rotary 9 vice-level pump (7) having an impeller in which a working fluid 9 is pressurized and driven by a 9 drive shaft (8); # - an evaporator section comprising an evaporator (9) in which the working fluid pressurized in the rotary liquid pump (7) is at least partially evaporated by the application of heat from a heat source; - an expansion section {3} comprising a rotary expansion machine {11) with an inlet port {16} and a rotary expansion element in which the working fluid at least partially evaporated in the evaporator section is expanded; and “a generator section (53 including a rotating power generator {13} with a rotor, wherein the expansion section (3), the fluidic pump section (à) and the generator section (5) are rotatably connected in such a way that relative rotational speed ratios between the rotating expansion element of the rotary expansion machine {11}, the impeller of the rotary vice pump {73 and the rotor of the rotary power generator (13) are mechanically maintained, characterized in that the drive shaft {8} driving the impeller of the rotary vice pump (7) is configured to be provided with a throttling device that allows a controlled portion (15) of the working fluid to be supplied to the rotating fluid pump
(7) enters from the liquid pump section {4} to the; expansion section (3) and / or the generator section (5),
[2]
The power generation system according to claim: 1, characterized in that the system for; power generation (13 is a Rankine cycle, in which the working fluid is circulated.:
[3]
The power generation system according to claim 1, 16 or 2, characterized in that the inlet port {16} of the rotary expansion machine (11) is in a higher position than an outlet port {17} of said rotary expansion machine. The power generation system according to any one of the preceding claims, characterized in that the rotating vice unit {7} is in a lower position than the inlet port {16} of the rotating expansion machine {11}.
B.- The power generation system according to any one of the preceding claims, characterized in that the rotating power generator (13) in the generator section is {5} a synchronous generator, preferably a permanent magnet generator.
The power generation system according to any of the preceding claims, characterized in that the working fluid is an organic working fluid, To The power generation system according to any one of the preceding claims, characterized in that it
: 23 9 werkiluidum comvat a lubricant or acts as a | lubricant, | B. The power generation system according to any one of the # 3 previous claims, characterized in that the rotary expansion element 9 is mounted on the drive shaft {8} which the | impeller of the rotating liquid pump {7}, 9 Ge The power generation system according to any one of the preceding claims, characterized in that the rotating 9 expansion element is mounted on a drive shaft (12) that 9 the rotary expansion machine (13) 9 10. The power generation system according to claims 8 and 3, characterized in that the drive shaft (8) driving the impeller of the reverse gear pump {7} is different from the drive shaft {12} that drives the rotor of the rotary power generator (13).
11. The power generation system according to one of the preceding claims 1 to 8, characterized in that the rotor of the rotary power generator (133 is driven by the drive shaft (8) driving the impelier of the rotary vice pump {7},
The power generation system according to any of the preceding claims, characterized in that the power generation system {1} further comprises a semi-hermetically closed housing (6} enclosing all rotating parts of the rotary expansion machine {11} and the reactive very power generator (15).
{24 | 13. The power generation system according to claim # 12, characterized in that the semi-hermetically closed | housing {6} encloses all rotating parts of the rotating: liquid pump {7}, 8 5 | 14. The power generation system according to claim 9, characterized in that the position of the expansion section F (3) in the semi-hermetically closed housing (6) is between the liquid pump section (4) and the generator section (5).
The power generation system according to claim 13, characterized in that the position of the generator section (5} in the semi-hermetically closed housing (6) is between the liquid pump section (4) and the expansion section {3},
16.7 The power generation system according to any one of the preceding claims, characterized in that the rotary expansion machine {T1} is a displacement expansion machine, preferably a double-bladed rotary expansion machine.
The power generation system according to any one of the preceding claims, characterized in that the rotary liquid pump (7) is a rotary positive displacement pump, preferably a gear pump.
The power generation system according to any of the preceding claims, characterized in that the rotary expansion machine (1233 and / or the rotary power generator (13) are mounted in a vertical position.
19, - The power generation system according to one of the | for the preceding claims i to 17, characterized in: that the rotary expansion machine {11} and / or the rotary power generator (13) are mounted in a horizontal position, 9 20. The power generation system according to one of the: previous claims, characterized in that the throttling device is an opening between the drive shaft (8) on which the impeller of the rotating liquid gum {7) is mounted and a seal (18) of this drive shaft (8) between the floor nozzle pump section {4} and one of the the expansion section (3) and the generator section (5),
21.- A method for generating power by means of a power generation system {1}, the power generation system {1} comprising: - a liquid pump section (4) comprising an inlet and a rotary liquid pump (7) with an Imneller in which a working fluid is pressurized and driven by a drive shaft (8); - an evaporator section comprising an evaporator (9) in which the working fluid pressurized in the rotating liquid pump {7} is at least partly evaporated by the supply of heat from a heat source; - an expansion section (3) comprising a rotary expansion machine {11} and a rotary expansion element in which the working fluid, which is at least partially evaporated in the evaporator section, is expanded; and 39 - a generator section (5) comprising a rotating power generator (13) with a rotor,
wherein the ezpanse section (3), the vice pump section | {4} and the generator section (5) are rockably connected in such a way that relative rotational speed ratios: between the rotary expansion element of the rotary expansion machine {11}, the impelier of the rotary solvent pump {73 and the rotor of the rotary | power generator (13) is mechanically maintained, 9 characterized in that # a controlled part (15) of the working fluid entering the rotating liquid nump {7} is passed from the liquid pump section {4} to the expansion section (3) and / or the generator section (5) by means of a throttle device, of which the drive shaft (8) driving the impeller of the rotary fuel pump (7) is provided, the rotary expansion machine {11} and / or rotary power generator (13} being cellulated by the controlled part (15) of the working fluid leaving the liquid pump section {4} to the expansion section {3} and the generator section (5), respectively.
A method of generating power according to claim 21, characterized in that the at least partially evaporated working fluid supplied to an inlet port {16} of the rotary expansion machine is in a gaseous or vapor state.
A method of generating power according to claim 21, characterized in that the working fluid supplied to an inlet port (16) of the rotary expansion machine (11) is a mixture of liquid and gaseous or vapor working fluid.
24, - A method of generating power according to any one of the preceding claims 21 to 23, characterized in that the rotor of the rotating power generator (13} is exposed to a pressure exerted by the working fluid which is 3 5 higher then a pressure of the working fluid at the inlet of the vice pump section (4) and lower than a pressure of the working fluid at an outlet of the fluid pump section (4). 9 23. "A method of generating power according to one 9 10 of the preceding claims 21 to 24, characterized in that the rotor of the rotating power generator # {13} is subjected to a mixture of liquid and gaseous or vapor working fluid.
A method of generating power according to any one of the preceding claims 21 to 25, characterized in that a mass flow of the controlled part {15} of the working fluid that is passed through a smector device from the vice hull section (2) to the expansion section (31 and / or the generator section {5} is less than 25%, preferably less than 10%, more preferably less than 5%, and most preferably less than 3% of a total mass flow of the working fluid supplied to the inlet of the fluid pump section (4).

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同族专利:

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公开号 | 公开日

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CN113661307A|2021-11-16|

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BE1027172A1|2020-10-27|

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法律状态:
2020-12-04| FG| Patent granted|Effective date: 20201105 |

优先权:

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申请号 | 申请日 | 专利标题

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US201962829738P| true| 2019-04-05|2019-04-05|EP20705261.4A| EP3947922A1|2019-04-05|2020-02-11|Power generation system and method to generate power by operation of such power generation system|

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PCT/IB2020/051081| WO2020201843A1|2019-04-05|2020-02-11|Power generation system and method to generate power by operation of such power generation system|

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CN202080026020.XA| CN113661307A|2019-04-05|2020-02-11|Power generation system and method of generating power by operating such a power generation system|