CN116220850A - Organic Rankine cycle variable frequency power generation device and compressed air energy storage system - Google Patents

Organic Rankine cycle variable frequency power generation device and compressed air energy storage system Download PDF

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Publication number
CN116220850A
CN116220850A CN202310288198.7A CN202310288198A CN116220850A CN 116220850 A CN116220850 A CN 116220850A CN 202310288198 A CN202310288198 A CN 202310288198A CN 116220850 A CN116220850 A CN 116220850A
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working medium
turbine
medium pump
motor
power generation
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CN202310288198.7A
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Chinese (zh)
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王星
徐玉杰
李文
朱阳历
陈海生
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Institute of Engineering Thermophysics of CAS
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Institute of Engineering Thermophysics of CAS
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Priority to CN202310288198.7A priority Critical patent/CN116220850A/en
Publication of CN116220850A publication Critical patent/CN116220850A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K13/00—General layout or general methods of operation of complete plants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/10—Adaptations for driving, or combinations with, electric generators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K21/00—Steam engine plants not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
    • F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

The invention relates to the technical field of power generation devices, in particular to an organic Rankine cycle variable-frequency power generation device and a compressed air energy storage system, wherein the power generation device comprises: the integrated motor type working medium pump is integrated; the working medium pump motor rotor of the working medium pump motor is fixedly arranged on a working medium pump wheel disc of the working medium pump; the evaporator is communicated with a working medium outlet of the integrated motor type working medium pump, and the boosted working medium absorbs heat of a high-temperature heat source through the evaporator and makes the working medium phase change gasified; an integrated motor turbine; an integrated motor turbine; the turbine motor rotor of the turbine motor is fixedly arranged on a turbine wheel disc of the turbine; the cooler is used for cooling the working medium; the liquid storage tank is used for storing the cooled working medium and providing the working medium for the integrated motor type working medium pump. The structure can effectively solve the problems that the organic Rankine cycle variable frequency power generation device in the prior art has low working medium flowing efficiency, is easy to leak working medium and is likely to damage an atmospheric ozone layer.

Description

Organic Rankine cycle variable frequency power generation device and compressed air energy storage system
Technical Field
The invention relates to the technical field of power generation devices, in particular to an organic Rankine cycle variable-frequency power generation device and a compressed air energy storage system.
Background
Under the background that the problems of energy shortage, environmental pollution and the like of various countries in the world are increasingly serious, the development of clean energy and the improvement of energy utilization efficiency have become topics of general concern for human society. The organic Rankine cycle not only can effectively realize the conversion from high-grade cold energy to high-grade electric energy, but also has the advantages of simple structure, low operation cost, environmental friendliness, high reliability, convenient operation, high power generation efficiency and the like, and is becoming a research hot spot in recent years.
A common ideal organic rankine cycle consists of four processes: 1) Isentropic pressurization process in the working medium pump; 2) A constant pressure heating process in the evaporator; 3) Isentropic expansion of the turbine; 4) A constant pressure exothermic process within the condenser. Therefore, the circulation only needs four parts of a working medium pump, an evaporator, a turbine and a condenser. Wherein the working medium pump and the turbine are main rotating parts of the system, and the efficiency of the working medium pump and the turbine has an important influence on the system efficiency. However, the prior art working fluid pumps and turbines have the following problems: 1) The working medium pump and the turbine are connected with the motor through a transmission shaft. The flow-through parts of the two flow-through parts need to adopt radial air inlet/exhaust devices, so that the flow field of the working medium is not uniformly folded, and the flow efficiency is reduced. 2) The existing working medium pump and turbine are connected with the motor through the transmission shaft, so that a dynamic and static gap is formed between the rotating shaft and the static through-flow component, and the possibility of leakage of working medium is improved. Moreover, if the power generation device adopts a fluorine-containing working medium, the ozone layer of the atmosphere can be damaged.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to solve the problems that the organic Rankine cycle variable frequency power generation device in the prior art has low working medium flowing efficiency, is easy to leak working medium and is likely to damage an atmospheric ozone layer. To this end, the present invention provides an organic rankine cycle variable frequency power generation device comprising:
an integrated motor type working medium pump for boost pressure to working medium, the integrated motor type working medium pump includes: a working medium pump motor and a working medium pump; the working medium pump motor rotor of the working medium pump motor is fixedly arranged on a working medium pump wheel disc of the working medium pump;
the evaporator is communicated with a working medium outlet of the integrated motor type working medium pump, and the boosted working medium absorbs heat of a high-temperature heat source through the evaporator and makes the working medium phase change gasified;
the integrated motor type turbine is communicated with the evaporator and is used for performing work and power generation by expanding high-temperature and high-pressure working medium discharged by the evaporator; the integrated motor turbine comprises: a turbine motor and a turbine; the turbine motor rotor of the turbine motor is fixedly arranged on a turbine wheel disc of the turbine;
the cooler is communicated with the working medium outlet of the integrated motor type turbine and is used for cooling the working medium;
the liquid storage tank is respectively communicated with the cooler and the integrated motor type working medium pump and is used for storing the cooled working medium and providing the working medium for the integrated motor type working medium pump.
Optionally, a working medium pump motor stator of the working medium pump motor is fixed on a pump body shell of the working medium pump; and/or the number of the groups of groups,
the turbine motor stator of the turbine motor is fixed on the turbine housing of the turbine.
Optionally, the turbine further comprises: turbine stationary vanes and turbine movable vanes; the turbine motor stator is arranged on the turbine stationary blade, and the turbine motor rotor is arranged on the turbine movable blade.
Optionally, the organic rankine cycle variable frequency power generation device further includes:
the power grid is connected with the integrated motor type working medium pump through a working medium pump frequency converter and supplies power for the integrated motor type working medium pump; the integrated motor type turbine is connected with the power grid through the turbine frequency converter and supplies power for the power grid.
Optionally, the evaporator absorbs industrial waste heat, thereby supplying heat to the working medium.
Optionally, the working medium pump motor is a synchronous motor or an asynchronous motor; and/or the number of the groups of groups,
the working medium pump is a vane type axial flow working medium pump or a vane type centrifugal working medium pump.
Optionally, the turbine motor is a synchronous motor or an asynchronous motor; and/or the number of the groups of groups,
the turbine is an axial flow turbine, a centrifugal turbine or a centripetal turbine.
Optionally, the working medium pump frequency converter is in a four-quadrant form;
the working medium pump is in a normal running state, and the working medium pump frequency converter is used for converting electric energy of the power grid into electric energy required by the working medium pump so as to drive the working medium pump to run;
the working medium pump is in an abnormal operation state, and the working medium pump frequency converter is used for driving the working medium pump motor to enter a dragging mode so as to realize emergency braking of the working medium pump.
Optionally, the turbine frequency converter is in a four-quadrant form;
the turbine frequency converter is used for converting the electric energy generated by the turbine motor into power frequency electric energy under the normal running state of the turbine so as to meet the power grid requirement;
in the turbine starting process, the turbine enters an electric mode, and the turbine frequency converter supplies power to the turbine so as to drive the turbine to reach a designed rotating speed;
and when the turbine load shedding fault occurs, the turbine frequency converter drives the turbine to brake so as to prevent turbine runaway.
Optionally, a working medium pump motor rotor of the working medium pump motor is arranged on a working medium pump impeller of the working medium pump; the working medium pump impeller of the working medium pump is rotatably arranged on the pump body shell through the working medium pump rotating shaft.
A compressed air energy storage system comprising:
an organic Rankine cycle variable frequency power generation device; the method comprises the steps of,
the compressed air energy storage mechanism is communicated with the evaporator and supplies heat to the evaporator.
The technical scheme of the invention has the following advantages:
1. the invention provides an organic Rankine cycle variable frequency power generation device, which comprises:
an integrated motor type working medium pump for boost pressure to working medium, the integrated motor type working medium pump includes: a working medium pump motor and a working medium pump; the working medium pump motor rotor of the working medium pump motor is fixedly arranged on a working medium pump wheel disc of the working medium pump;
the evaporator is communicated with a working medium outlet of the integrated motor type working medium pump, and the boosted working medium absorbs heat of a high-temperature heat source through the evaporator and makes the working medium phase change gasified;
the integrated motor type turbine is communicated with the evaporator and is used for performing work and power generation by expanding high-temperature and high-pressure working medium discharged by the evaporator; the integrated motor turbine comprises: a turbine motor and a turbine; the turbine motor rotor of the turbine motor is fixedly arranged on a turbine wheel disc of the turbine;
the cooler is communicated with the working medium outlet of the integrated motor type turbine and is used for cooling the working medium;
the liquid storage tank is respectively communicated with the cooler and the integrated motor type working medium pump and is used for storing the cooled working medium and providing the working medium for the integrated motor type working medium pump.
In order to solve the problems that in the prior art, a working medium pump and a turbine of an organic Rankine cycle variable frequency power generation device are in transmission connection with a motor through a transmission shaft, so that the power generation device has low working medium flowing efficiency, is easy to leak working medium and can damage an atmospheric ozone layer. According to the integrated motor type working medium pump and the integrated motor type turbine, the organic Rankine cycle variable frequency power generation device does not need a shaft end sealing device, so that the manufacturing cost is reduced, and shaft end leakage is avoided. In addition, the integrated motor type working medium pump and the integrated motor type turbine do not need a coupler, so that the manufacturing cost is further reduced, and the coupler loss is reduced. In addition, the integrated motor type working medium pump and the integrated motor type turbine avoid the turning of the flow direction of the through-flow part and avoid the flow loss due to the fact that the shafting connection between the working medium pump motor and the working medium pump is canceled.
2. According to the organic Rankine cycle variable frequency power generation device provided by the invention, the working medium pump motor stator of the working medium pump motor is fixed on the pump body shell of the working medium pump; the turbine motor stator of the turbine motor is fixed on the turbine housing of the turbine.
In the invention, the stator of the working medium pump motor is fixed on the pump body shell of the working medium pump, and the stator of the turbine motor is fixed on the turbine shell of the turbine. The rotor of the turbine motor fixedly arranged on the turbine wheel disc of the turbine can be effectively guaranteed to rotate relative to the stator of the turbine motor. And the working medium pump motor rotor fixedly arranged on the working medium pump wheel disc of the working medium pump and the working medium pump motor stator form relative rotation. The integrated motor type working medium pump and the integrated motor type turbine can work stably and reliably.
3. The invention provides an organic Rankine cycle variable frequency power generation device, which is characterized in that the turbine further comprises: turbine stationary vanes and turbine movable vanes; the turbine motor stator is arranged on the turbine stationary blade, and the turbine motor rotor is arranged on the turbine movable blade.
In the present invention, the turbine motor rotor is disposed on the turbine stator blades by disposing the turbine motor stator on the turbine stator blades. The turbine stator blade and the turbine movable blade can rotate relatively, and the turbine motor rotor can rotate relative to the turbine motor stator, so that power generation is realized. The structure is simple and reliable, and the power generation efficiency can be effectively improved.
4. The invention provides an organic Rankine cycle variable frequency power generation device, which further comprises: the power grid is connected with the integrated motor type working medium pump through a working medium pump frequency converter and supplies power for the integrated motor type working medium pump; the integrated motor type turbine is connected with the power grid through the turbine frequency converter and supplies power for the power grid.
In the invention, the power grid is respectively communicated with the integrated motor type working medium pump and the integrated motor type turbine through the frequency converter. The structure can be effectively realized: the power grid supplies power for the integrated motor type working medium pump, and the integrated motor type turbine supplies power for the power grid.
5. According to the organic Rankine cycle variable frequency power generation device provided by the invention, the evaporator absorbs industrial waste heat, so that heat is supplied to working media.
In the invention, the power grid supplies power for the integrated motor type working medium pump, so as to boost the working medium. The boosted working medium absorbs the heat of the high-temperature heat source through the evaporator and makes the working medium phase change gasified. Then, the high-temperature working medium enters an integrated motor type turbine to expand and do work to generate electricity, and the electricity is transmitted to a power grid after frequency conversion. In the process, the system obtains heat from high-temperature heat sources such as industrial waste heat by utilizing the evaporator, so that the electric energy obtained by the system from the power grid and used for driving the integrated motor type working medium pump is smaller than the electric energy fed back to the power grid from the integrated motor type turbine, and further the organic Rankine cycle variable frequency power generation device provided by the invention can generate power to the power grid in a net manner.
6. The invention provides an organic Rankine cycle variable frequency power generation device, wherein a working medium pump frequency converter is in a four-quadrant form; the working medium pump is in a normal running state, and the working medium pump frequency converter is used for converting electric energy of the power grid into electric energy required by the working medium pump so as to drive the working medium pump to run; the working medium pump is in an abnormal operation state, and the working medium pump frequency converter is used for driving the working medium pump motor to enter a dragging mode so as to realize emergency braking of the working medium pump.
In the invention, the working medium pump frequency converter is in a four-quadrant form, so that the invention can be realized: the working medium pump is driven to operate in a normal operation state; under the abnormal operation state of the working medium pump, the motor of the working medium pump is driven to enter a dragging mode, so that emergency braking of the working medium pump is realized. And further improves the maneuverability and safety of the system operation.
7. The turbine frequency converter is in a four-quadrant form; the turbine frequency converter is used for converting the electric energy generated by the turbine motor into power frequency electric energy under the normal running state of the turbine so as to meet the power grid requirement; in the turbine starting process, the turbine enters an electric mode, and the turbine frequency converter supplies power to the turbine so as to drive the turbine to reach a designed rotating speed; and when the turbine load shedding fault occurs, the turbine frequency converter drives the turbine to brake so as to prevent turbine runaway.
In the invention, the turbine frequency converter is in a four-quadrant form, so that the method can be realized: in the turbine starting process, driving the turbine to accelerate so as to quickly reach the design rotation speed; under the normal operation state of the turbine, converting the electric energy generated by the turbine motor into power frequency electric energy so as to supply power for a power grid; and when the load shedding fault of the turbine occurs, the turbine is driven to brake so as to prevent the turbine from flying. And further improves the maneuverability and safety of the system operation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an organic Rankine cycle variable frequency power generation device provided by the invention;
FIG. 2 is a schematic view of the internal structure of an integrated motor turbine provided by the present invention;
fig. 3 is a schematic diagram of the internal structure of the integrated motor-type working medium pump provided by the invention.
Reference numerals illustrate:
1-an integrated motor type working medium pump; 2-working medium pump motor; 3-a working medium pump; 4-an evaporator; 5-an integrated motor turbine; 6-turbine motor; 7-turbine; an 8-cooler; 9-a liquid storage tank; 10-an electric grid; 11-working medium pump frequency converter; 12-turbine frequency converter; 13-working medium pump motor rotor; 14-a turbine motor rotor; 15-working medium pump motor stator; 16-a pump body housing; 17-turbine motor stator; 18-turbine housing; 19-turbine vanes; 20-turbine blades; 21-working medium pump impeller; 22-working medium pump rotating shaft.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
In this embodiment, an organic rankine cycle variable frequency power generation device is provided, as shown in fig. 1, which includes:
an integrated motor-type working substance pump 1 for boosting a working substance, as shown in fig. 3, the integrated motor-type working substance pump 1 includes: a working medium pump motor 2 and a working medium pump 3; the working medium pump motor rotor 13 of the working medium pump motor 2 is arranged on the working medium pump impeller 21 of the working medium pump 3; a working medium pump motor stator 15 of the working medium pump motor 2 is fixed on a pump body shell 16 of the working medium pump 3; the working medium pump impeller 21 of the working medium pump 3 is rotatably arranged on the pump body shell 16 through the working medium pump rotating shaft 22. The working medium pump motor 2 is a synchronous motor; the working medium pump 3 is a vane type axial flow working medium pump;
the evaporator 4 is communicated with a working medium outlet of the integrated motor type working medium pump 1, and the boosted working medium absorbs heat of a high-temperature heat source through the evaporator 4 and makes the working medium phase change gasified; the evaporator 4 absorbs industrial waste heat, thereby supplying heat to the working medium;
the integrated motor type turbine 5 is communicated with the evaporator 4 and is used for performing work expansion and power generation by utilizing high-temperature and high-pressure working medium discharged by the evaporator 4; the integrated motor turbine 5 includes: a turbine motor 6 and a turbine 7; the turbine motor rotor 14 of the turbine motor 6 is fixedly arranged on a turbine wheel disc of the turbine 7; in the present invention, as shown in fig. 2: the turbine 7 further comprises: turbine vanes 19 and blades 20; the turbine stator 17 is disposed on the turbine stator blade 19, and the turbine rotor 14 is disposed on the turbine rotor blade 20. In addition, a turbine motor stator 17 of the turbine motor 6 is also fastened to a turbine housing 18 of the turbine 7. In addition, the turbine motor 6 is a synchronous motor, and the turbine 7 is an axial flow turbine;
the cooler 8 is communicated with the working medium outlet of the integrated motor type turbine 5 and is used for cooling the working medium;
the liquid storage tank 9 is respectively communicated with the cooler 8 and the integrated motor type working medium pump 1 and is used for storing the cooled working medium and providing the working medium for the integrated motor type working medium pump 1;
the power grid 10 is connected with the integrated motor type working medium pump 1 through a working medium pump frequency converter 11 and supplies power for the integrated motor type working medium pump 1; the integrated motor turbine 5 is connected with the power grid 10 through a turbine frequency converter 12, and the integrated motor turbine 5 supplies power for the power grid 10.
In this embodiment, in order to ensure the mobility and safety of the system operation, the working medium pump frequency converter 11 is in a four-quadrant mode; in the normal operation state of the working medium pump 3, the working medium pump frequency converter 11 is configured to convert the electric energy of the power grid 10 into the electric energy required by the working medium pump 3, so as to drive the working medium pump 3 to operate; the working medium pump 3 is in an abnormal operation state, and the working medium pump frequency converter 11 is used for driving the working medium pump motor 2 to enter a dragging mode, so that emergency braking of the working medium pump 3 is realized.
In addition, the turbine frequency converter 12 is in a four-quadrant form; in the normal operation state of the turbine 7, the turbine frequency converter 12 is configured to convert the electric energy generated by the turbine motor 6 into power frequency electric energy so as to meet the requirements of the power grid 10; during the starting process of the turbine 7, the turbine 7 enters an electric mode, and the turbine frequency converter 12 supplies power to the turbine 7 so as to drive the turbine 7 to reach a designed rotating speed; in the event of a load dump failure of the turbine 7, the turbine converter 12 drives the turbine 7 to brake, in order to prevent turbine runaway.
Of course, the present embodiment does not specifically limit the position of the turbine motor stator 17 of the turbine motor 6, and in other embodiments, the turbine motor stator 17 may be provided on one of the turbine housing 18 and the turbine stator blade 19; alternatively, the turbine motor stator 17 may be mounted on a mount within the turbine housing 18.
Of course, in this embodiment, whether the organic rankine cycle variable frequency power generation device realizes power supply and power storage through the power grid 10 is not specifically limited, and in other embodiments, the organic rankine cycle variable frequency power generation device may also supply power to the battery through the frequency converter.
Of course, the source of the high-temperature heat source of the evaporator 4 is not particularly limited in this embodiment, and in other embodiments, the evaporator 4 may also supply heat to the working medium through a heat source in nature.
Of course, the motor type of the working fluid pump motor 2 is not particularly limited in this embodiment, and in other embodiments, the working fluid pump motor 2 may be an asynchronous motor.
Of course, the type of the working fluid pump 3 is not particularly limited in this embodiment, and in other embodiments, the working fluid pump 3 may be a vane-type centrifugal working fluid pump.
Of course, the motor type of the turbine motor 6 is not particularly limited in this embodiment, and in other embodiments, the turbine motor 6 may be an asynchronous motor.
Of course, the type of the turbine 7 is not particularly limited in this embodiment, and in other embodiments, the turbine 7 may be a centrifugal turbine or a centripetal turbine.
Of course, the type of turbine 7 is not particularly limited in this embodiment, and in other embodiments,
example 2
A compressed air energy storage system comprising: an organic Rankine cycle variable frequency power generation device; and the compressed air energy storage mechanism is communicated with the evaporator 4 and supplies heat to the evaporator 4.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims (11)

1. An organic rankine cycle variable frequency power generation device, characterized by comprising:
an integrated motor type working medium pump (1) for boost working medium, integrated motor type working medium pump (1) includes: a working medium pump motor (2) and a working medium pump (3); a working medium pump motor rotor (13) of the working medium pump motor (2) is fixedly arranged on a working medium pump wheel disc of the working medium pump (3);
the evaporator (4) is communicated with a working medium outlet of the integrated motor type working medium pump (1), and the boosted working medium absorbs heat of a high-temperature heat source through the evaporator (4) and makes the working medium phase change gasified;
an integrated motor turbine (5) which is communicated with the evaporator (4) and is used for performing expansion work and power generation by utilizing high-temperature and high-pressure working medium discharged by the evaporator (4); the integrated motor turbine (5) comprises: a turbine motor (6) and a turbine (7); the turbine motor rotor (14) of the turbine motor (6) is fixedly arranged on a turbine wheel disc of the turbine (7);
the cooler (8) is communicated with the working medium outlet of the integrated motor type turbine (5) and is used for cooling the working medium;
the liquid storage tank (9) is respectively communicated with the cooler (8) and the integrated motor type working medium pump (1) and is used for storing the cooled working medium and providing the working medium for the integrated motor type working medium pump (1).
2. The organic rankine cycle variable frequency power generation device according to claim 1, wherein a working medium pump motor stator (15) of the working medium pump motor (2) is fixed on a pump body housing (16) of the working medium pump (3); and/or the number of the groups of groups,
a turbine motor stator (17) of the turbine motor (6) is fastened to a turbine housing (18) of the turbine (7).
3. The organic rankine cycle variable frequency power generation device according to claim 2, wherein the turbine (7) further comprises: a turbine stationary blade (19) and a turbine movable blade (20); the turbine motor stator (17) is arranged on the turbine stationary blade (19), and the turbine motor rotor (14) is arranged on the turbine movable blade (20).
4. The organic rankine cycle variable frequency power generation device according to any one of claims 1 to 3, further comprising:
the power grid (10) is connected with the integrated motor type working medium pump (1) through a working medium pump frequency converter (11) to supply power for the integrated motor type working medium pump (1); the integrated motor type turbine (5) is connected with the power grid (10) through a turbine frequency converter (12), and the integrated motor type turbine (5) supplies power for the power grid (10).
5. The organic rankine cycle variable frequency power generation device according to claim 4, wherein the evaporator (4) absorbs industrial waste heat to supply heat to the working medium.
6. The organic Rankine cycle variable frequency power generation device of claim 1, wherein the variable frequency power generation device comprises a plurality of power converters,
the working medium pump motor (2) is a synchronous motor or an asynchronous motor; and/or the number of the groups of groups,
the working medium pump (3) is a vane type axial flow working medium pump or a vane type centrifugal working medium pump.
7. The organic Rankine cycle variable frequency power generation device of claim 1, wherein the variable frequency power generation device comprises a plurality of power converters,
the turbine motor (6) is a synchronous motor or an asynchronous motor; and/or the number of the groups of groups,
the turbine (7) is an axial turbine, a centrifugal turbine or a centripetal turbine.
8. The organic rankine cycle variable frequency power generation device according to claim 4, wherein the working medium pump frequency converter (11) is in a four-quadrant form;
the working medium pump (3) is in a normal running state, and the working medium pump frequency converter (11) is used for converting electric energy of the power grid (10) into electric energy required by the working medium pump (3) so as to drive the working medium pump (3) to run;
the working medium pump (3) is in an abnormal operation state, and the working medium pump frequency converter (11) is used for driving the working medium pump motor (2) to enter a dragging mode so as to realize emergency braking of the working medium pump (3).
9. The organic rankine cycle variable frequency power generation device according to claim 4, wherein the turbine frequency converter (12) is in a four-quadrant form;
the turbine (7) is in a normal running state, and the turbine frequency converter (12) is used for converting electric energy generated by the turbine motor (6) into power frequency electric energy so as to meet the requirements of the power grid (10);
during the starting process of the turbine (7), the turbine (7) enters an electric mode, and the turbine frequency converter (12) supplies power to the turbine (7) so as to drive the turbine (7) to reach a design rotating speed;
in case of a load dump failure of the turbine (7), the turbine converter (12) drives the turbine (7) to brake so as to prevent turbine runaway.
10. The organic rankine cycle variable frequency power generation device according to claim 2, wherein a working medium pump motor rotor (13) of the working medium pump motor (2) is provided on a working medium pump impeller (21) of the working medium pump (3); a working medium pump impeller (21) of the working medium pump (3) is rotatably arranged on the pump body shell (16) through a working medium pump rotating shaft (22).
11. A compressed air energy storage system, comprising:
the organic rankine cycle variable frequency power generation device of any one of claims 1 to 10; the method comprises the steps of,
the compressed air energy storage mechanism is communicated with the evaporator (4) and supplies heat to the evaporator (4).
CN202310288198.7A 2023-03-22 2023-03-22 Organic Rankine cycle variable frequency power generation device and compressed air energy storage system Pending CN116220850A (en)

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CN202310288198.7A CN116220850A (en) 2023-03-22 2023-03-22 Organic Rankine cycle variable frequency power generation device and compressed air energy storage system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310288198.7A CN116220850A (en) 2023-03-22 2023-03-22 Organic Rankine cycle variable frequency power generation device and compressed air energy storage system

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