Heat energy power generation system based on efficient Rankine cycle and control method

Abstract

The invention discloses a heat energy power generation system based on efficient Rankine cycle and a control method. An outlet of a working medium pump included in the heat energy power generation system is connected with a heat regenerator cold side inlet through a heat regenerator cold side bypass valve. The heat regenerator cold side bypass valve is connected with a working medium inlet of the cooling liquid heat exchanger; a working medium outlet of the cooling liquid heat exchanger is respectively connected with inlets of the turbine bypass valve and the turbine inlet valve; an outlet of the turbine inlet valve is connected with a working medium inlet of the turbine power generation all-in-one machine; a working medium outlet of the turbine power generation all-in-one machine is connected with a hot side inlet of the heat regenerator through a turbine outlet valve; a hot side outlet of the heat regenerator is connected with a working medium inlet of the condenser; a condenser working medium outlet is connected with a liquid storage tank inlet; the liquid storage tank is connected with the working medium pump; the outlet of the cooling channel is connected with the working medium inlet of the condenser; and the outlet of the cooling channel is connected with the working medium inlet of the turbine power generation all-in-one machine. The low-boiling-point organic working medium is adopted to absorb cooling liquid heat of external devices (such as brake pads), and consumption reduction and efficiency improvement are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of urban rail train energy saving and emission reduction technology, in particular to the field of waste heat recovery and heat cycle power generation technology, and more particularly to a heat power generation system based on high-efficiency Rankine cycle and a control method. BACKGROUND

[0002] Urban rail train is a symbol of urban economy reaching a certain level, and plays an important role in public transportation.

[0003] For urban rail trains, frequent acceleration and deceleration operations are a significant feature of their operation. In the braking process, the cooling liquid in the braking device will increase in temperature, but there is currently no effective utilization, and there is a serious problem of braking energy waste. However, there is currently no technology that can reliably recover the braking energy of urban rail trains, save energy and reduce emissions, and achieve cost reduction and efficiency improvement.

[0004] Therefore, there is an urgent need to develop a technology that can solve the above technical problems. SUMMARY

[0005] The purpose of the present application is to provide a heat power generation system based on high-efficiency Rankine cycle and a control method to solve the technical defects of the prior art.

[0006] To this end, the present application provides a heat power generation system based on high-efficiency Rankine cycle, which comprises a working fluid pump, a regenerator, a cooling liquid heat exchanger, a turbine power generation all-in-one machine, a condenser and a liquid storage tank.

[0007] The working fluid outlet of the working fluid pump is connected in communication with one end of the first pipe branch and one end of the second pipe branch, respectively.

[0008] The other end of the first pipe branch is connected in communication with the inlet a of the regenerator cold side bypass valve.

[0009] The second outlet c of the regenerator cold side bypass valve is connected in communication with the cold side inlet of the regenerator.

[0010] The first outlet b of the regenerator cold side bypass valve is connected in communication with the working fluid inlet of the cooling liquid heat exchanger after converging with the condensing outlet of the regenerator.

[0011] The working fluid outlet of the cooling liquid heat exchanger is connected in communication with the inlet of the turbine bypass valve and the inlet of the turbine inlet valve, respectively.

[0012] The outlet of the turbine inlet valve is connected in communication with the working fluid inlet of the turbine power generation all-in-one machine.

[0013] The working fluid outlet of the turbine power generation all-in-one machine is connected in communication with the inlet of the turbine outlet valve.

[0014] The outlet of the turbine outlet valve and the outlet of the turbine bypass valve are connected to the hot side inlet of the regenerator after converging;

[0015] The hot side outlet of the regenerator is connected to the working medium inlet of the condenser;

[0016] The working medium outlet of the condenser is connected to the working medium inlet at the top of the liquid storage tank;

[0017] The working medium outlet at the lower end of the liquid storage tank is connected to the working medium inlet of the working medium pump;

[0018] The other end of the second pipeline branch is connected to one end of the cooling channel in the turbine generator through the turbine cooling inlet valve;

[0019] The other end of the cooling channel in the turbine generator is connected to the working medium inlet of the condenser through the turbine cooling outlet valve;

[0020] The cooling liquid in the cooling liquid heat exchanger is the cooling liquid provided by the external vehicle.

[0021] In addition, the application also provides a control method of the high-efficiency Rankine cycle-based thermal power generation system as described above, which includes the following working modes:

[0022] First, the working medium pump pressurizes the low-pressure and low-temperature liquid organic working medium from the liquid storage tank into high-pressure and low-temperature liquid, and delivers it to the inlet of the regenerator cold side bypass valve;

[0023] Then, the working medium is distributed through the regenerator cold side bypass valve and enters the regenerator to absorb the heat from the high-temperature and low-pressure gas from the turbine outlet valve, thereby becoming high-pressure and medium-temperature working medium fluid, and then mixing with the liquid working medium that does not enter the regenerator cold side, and entering the working medium inlet of the cooling liquid heat exchanger to absorb the heat of the cooling liquid, thereby becoming high-pressure and high-temperature working medium gas;

[0024] For the high-pressure and high-temperature working medium gas flowing out of the working medium outlet of the cooling liquid heat exchanger, if the turbine starting condition is met, it enters the turbine generator through the turbine inlet valve to expand and do work, thereby becoming low-pressure and high-temperature working medium gas, and then enters the regenerator hot side inlet through the turbine outlet valve;

[0025] For the high-pressure and high-temperature working medium gas flowing out of the working medium outlet of the cooling liquid heat exchanger, if the turbine starting condition is not met, it enters the regenerator hot side inlet through the turbine bypass valve, and then transfers heat to the cold side working medium of the regenerator, thereby becoming low-pressure and medium-temperature working medium fluid, and then enters the condenser to be heated, becoming low-pressure and low-temperature working medium liquid, and finally entering the liquid storage tank, thereby completing the working medium cycle.

[0026] From the above technical solutions provided by the present application, compared with the prior art, the present application provides a heat power generation system and control method based on high-efficiency Rankine cycle, which is scientific in design. The system uses low-boiling-point organic working medium to absorb the heat of the cooling liquid in the external device (such as brake pad and other braking devices), and then realizes the evaporation and overheating of the working medium. The electric energy is output by the turbine power generation all-in-one machine and stored in the battery pack, so as to provide clean power for the operation of urban rail trains and other vehicles, realize reliable recovery of the braking energy of urban rail trains and other vehicles, save energy and reduce emissions, realize energy saving and efficiency increase, and have great practical significance.

[0027] After inspection, the present application can utilize the heat of vehicle braking friction and the heat of motor operation for thermoelectric conversion to supplement clean power for urban rail train operation. The present application provides a braking energy recovery technology for urban rail transit, which helps to save energy and increase efficiency in the field of public transportation.

[0028] It should be noted that the present application is applied to urban rail trains. In the braking process of urban rail trains, the present application can realize energy saving and consumption reduction by using regenerative power generation and other energy recovery technologies. In addition to the kinetic energy recovery technology, the heat generated by the brake pads / brake discs during high-speed braking of urban rail trains can also be used for power generation. The heat power generation technology based on organic Rankine cycle (ORC) adopted by the present application has the advantages of simple components, mature theory, high system efficiency, etc. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 A structure diagram of a heat power generation system based on high-efficiency Rankine cycle provided by the present application is provided.

[0030] In the figure, 1 is a working medium pump, 2 is a regenerator cold side bypass valve, 3 is a regenerator, 4 is a cooling liquid heat exchanger, 5 is a turbine bypass valve;

[0031] 6 is a turbine inlet valve, 7 is a turbine power generation all-in-one machine, 8 is a battery pack, 9 is a turbine outlet valve, and 10 is a condenser.

[0032] 11 is a cooling fan, 12 is a liquid storage tank, 13 is a turbine cooling inlet valve, and 14 is a turbine cooling outlet valve. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0034] In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0035] In the description of the present application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "setting" should be understood broadly, for example, it can be fixedly connected, set, or it can be detachably connected, set, or integrally connected, set. For those skilled in the art, the specific meaning of the above terms in the present patent can be understood according to the specific circumstances.

[0036] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0037] Referring to Figure 1 The present application provides a high-efficiency Rankine cycle-based thermal power generation system, comprising a working medium pump 1, a regenerator 3 (regenerator, also called gas-liquid heat exchanger), a cooling liquid heat exchanger 4, a turbine power generation integrated machine 7, a condenser 10 and a liquid storage tank 12;

[0038] The working medium outlet of the working medium pump 1 is connected in communication with one end of the first pipeline branch and one end of the second pipeline branch, respectively;

[0039] Among them, the other end of the first pipeline branch is connected in communication with the inlet a of the regenerator cold side bypass valve 2;

[0040] The second outlet c of the regenerator cold side bypass valve 2 is connected in communication with the cold side inlet of the regenerator 3;

[0041] The first outlet b of the regenerator cold side bypass valve 2 is connected in communication with the working medium inlet of the cooling liquid heat exchanger 4 after converging with the condensing outlet of the regenerator 3;

[0042] The working medium outlet of the cooling liquid heat exchanger 4 is connected in communication with the inlet of the turbine bypass valve 5 and the inlet of the turbine inlet valve 6, respectively;

[0043] The outlet of the turbine inlet valve 6 is connected with the working medium inlet of the turbine power generation integrated machine 7.

[0044] The working medium outlet of the turbine power generation integrated machine 7 is connected with the inlet of the turbine outlet valve 9.

[0045] The outlet of the turbine outlet valve 9 is connected with the outlet of the turbine bypass valve 5 after the confluence, and is connected with the hot side inlet of the regenerator 3.

[0046] The hot side outlet of the regenerator 3 is connected with the working medium inlet of the condenser 10.

[0047] The working medium outlet of the condenser 10 is connected with the working medium inlet at the top of the liquid storage tank 12.

[0048] The working medium outlet at the lower end of the liquid storage tank 12 is connected with the working medium inlet of the working medium pump 1.

[0049] The other end of the second pipeline branch is connected with one end of the cooling channel in the turbine power generation integrated machine 7 through the turbine cooling inlet valve 13.

[0050] The other end of the cooling channel in the turbine power generation integrated machine 7 is connected with the working medium inlet of the condenser 10 through the turbine cooling outlet valve 14.

[0051] The cooling liquid in the cooling liquid heat exchanger is the cooling liquid provided by the external transportation tool (for example, the urban rail train).

[0052] In the present application, the cooling liquid inlet d of the cooling liquid heat exchanger 4 is connected with the cooling liquid outlet of the external transportation tool (for example, the urban rail train).

[0053] The cooling liquid outlet e of the cooling liquid heat exchanger 4 is connected with the cooling liquid inlet of the external transportation tool.

[0054] Specifically, the cooling liquid outlet of the external transportation tool (for example, the urban rail train) can be the cooling liquid outlet of the cooling liquid storage cavity matched with the braking device of the external transportation tool, or the cooling liquid outlet of the cooling liquid storage cavity matched with the motor controller of the external transportation tool.

[0055] Correspondingly, the cooling liquid inlet of the external transportation tool (for example, the urban rail train) can be the cooling liquid inlet of the cooling liquid storage cavity matched with the braking device of the external transportation tool, or the cooling liquid inlet of the cooling liquid storage cavity matched with the motor controller of the external transportation tool.

[0056] It should be noted that, for the present application, the cooling liquid can specifically come from the forced cooling system of the key equipment (including motors, controllers, brake pads, etc.) in the urban rail train, and these cooling liquids are used for cooling the braking system (such as brake pads / brake discs) and the motor controller in the train.

[0057] In the present application, the working medium of the system can be R245fa or R1233zd.

[0058] In the present application, any two devices that are in communication with each other and transmit working medium between each other are connected through hollow connecting pipes.

[0059] In the present application, a plurality of cooling fans 11 are arranged beside the condenser 10.

[0060] The cooling fan 11 is used to blow convection air to the condenser 10 to cool the condenser 10.

[0061] In the present application, the power output port of the turbine-generator integrated machine 7 is connected to the rectifier and the battery pack 8 in sequence through a cable.

[0062] Specifically, the battery pack 8 includes a plurality of energy storage batteries (such as lithium ion batteries);

[0063] The plurality of energy storage batteries are connected in parallel, in series, or in series-parallel (i.e., a combination of series and parallel connection).

[0064] It should be noted that the specific manner of connecting the plurality of energy storage batteries (such as lithium ion batteries) in series, in parallel, or in series-parallel for the battery pack is a conventional and well-known technology, which will not be described here.

[0065] In order to more clearly understand the technical solutions of the present application, the functions of the main components in the present application and the working principle of mutual cooperation are described below.

[0066] In the present application, the working medium pump 1 is used to pressurize the working medium and deliver the pressurized working medium to the regenerator cold side bypass valve;

[0067] The regenerator cold side bypass valve 2 is used to control the working medium from the working medium pump 1 to enter the cold side of the regenerator 3 or directly enter the cooling liquid heat exchanger 4.

[0068] The regenerator 3 is used to heat the working medium from the regenerator cold side bypass valve 2 by using the working medium from the turbine-generator integrated machine 7.

[0069] The cooling liquid heat exchanger 4 is used to heat the working medium flowing therethrough using cooling liquid.

[0070] The turbine bypass valve 5 is used to control whether the working medium from the cooling liquid heat exchanger 4 can enter the hot side of the regenerator 3.

[0071] The turbine inlet valve 6 is used to control whether the working medium from the cooling liquid heat exchanger 4 can enter the turbine-generator integrated machine 7.

[0072] The turbine power generation integrated machine 7 is used to expand the high-temperature and high-pressure working medium gas flowing therein, convert the heat energy of the working medium into mechanical energy, and then convert the mechanical energy into electrical energy for output;

[0073] The battery pack 8 is used to store the electrical energy from the turbine power generation integrated machine 7.

[0074] The turbine outlet valve 9 is used to control whether the working medium from the turbine power generation integrated machine 7 can enter the hot side of the regenerator 3.

[0075] The condenser 10 is used to cool the working medium from the regenerator 3 and the turbine power generation integrated machine 7.

[0076] The cooling fan 11 is used to drive the flow of air to cool the working medium in the condenser 10.

[0077] Based on the above-mentioned high-efficiency Rankine cycle-based thermal energy power generation system, the present application further provides a control method for the high-efficiency Rankine cycle-based thermal energy power generation system, which includes the following working modes:

[0078] First, the working medium pump 1 pressurizes the low-pressure and low-temperature liquid organic working medium from the liquid storage tank 14 into high-pressure and low-temperature liquid, and delivers it to the inlet of the regenerator cold side bypass valve 2.

[0079] Then, the working medium is distributed by the regenerator cold side bypass valve 2 and enters the regenerator 3 to absorb the heat from the high-temperature and low-pressure gas from the turbine outlet valve 9, thereby becoming high-pressure and medium-temperature working medium fluid (which may be in three states of liquid, gas-liquid two-phase, and gas), and then mixing with the liquid working medium that does not enter the cold side of the regenerator 3, and entering the working medium inlet of the cooling liquid heat exchanger 4 to absorb the heat of the cooling liquid, thereby becoming high-pressure and high-temperature working medium gas.

[0080] For the high-pressure and high-temperature working medium gas flowing out of the working medium outlet of the cooling liquid heat exchanger 4, if the turbine start-up condition is met, it enters the turbine power generation integrated machine 7 through the turbine inlet valve 6 to expand and do work, thereby becoming low-pressure and high-temperature working medium gas, and then enters the hot side inlet of the regenerator 3 through the turbine outlet valve 9.

[0081] For the high-pressure and high-temperature working medium gas flowing out of the working medium outlet of the cooling liquid heat exchanger 4, if the turbine start-up condition is not met, it enters the hot side inlet of the regenerator 3 through the turbine bypass valve 5, and then transfers heat to the cold side working medium of the regenerator 3, thereby becoming low-pressure and medium-temperature working medium fluid (which may be in two states of gas-liquid two-phase and gas), and then entering the condenser 10 to be heated, becoming low-pressure and low-temperature working medium liquid, and finally entering the liquid storage tank 12, thereby completing the working medium cycle.

[0082] It should be noted that the turbine starting condition refers to: when the system starts to work and the turbine inlet valve 6 is in the open state, at this time, it indicates that the turbine starting condition is met. The turbine starting condition plays a role: so that the working medium can enter the turbine generator integrated machine 7.

[0083] In the present application, by closing the turbine inlet valve 6, the working medium cannot enter the turbine generator integrated machine 7.

[0084] In the present application, in specific implementation, the opening pressure of the turbine inlet valve 6 is equal to the working medium inlet design pressure possessed by the turbine generator integrated machine 7. When the pressure of the high-pressure high-temperature working medium gas flowing out of the working medium outlet of the cooling liquid heat exchanger 4 is less than the opening pressure of the turbine inlet valve 6, the turbine inlet valve 6 is in the closed state; and when the pressure of the high-pressure high-temperature working medium gas flowing out of the working medium outlet of the cooling liquid heat exchanger 4 is greater than the opening pressure of the turbine inlet valve 6, the turbine inlet valve 6 is in the open (conductive) state.

[0085] In the present application, in specific implementation, the working mode further includes the following processing operations:

[0086] At the outlet of the working medium pump 1, a small part of high-pressure low-temperature working medium is divided by the turbine cooling inlet valve 13 and enters the cooling channel in the turbine generator integrated machine 7, thereby taking away the bearing and motor heat generated by the turbine at high speed rotation of the turbine generator integrated machine 7, and then flowing into the working medium inlet of the condenser 10 through the turbine cooling outlet valve 14.

[0087] It should be noted that the cooling channel in the turbine generator integrated machine 7 exists heat transfer with the bearing and motor in the turbine generator integrated machine 7.

[0088] In the present application, in specific implementation, the low-pressure medium-temperature working medium fluid is cooled in the condenser 10 by natural convection air or forced convection air provided by the cooling fan 11, and is changed into low-pressure low-temperature liquid by heat absorption.

[0089] In the present application, in specific implementation, the turbine generator integrated machine 7 outputs electric energy into the battery pack 8 through the rectifier and the like for storage.

[0090] In summary, compared with the prior art, the present application provides a heat power generation system and control method based on high-efficiency Rankine cycle, which is designed scientifically. The system uses low-boiling-point organic working medium to absorb the heat of the cooling liquid in the brake pad and other braking devices, thereby realizing working medium evaporation and overheating, outputting electric energy through the turbine generator integrated machine and storing in the battery pack, so as to provide clean power for the operation of urban rail trains and other vehicles, realize reliable recovery of braking energy of urban rail trains and other vehicles, save energy and reduce emissions, realize energy saving and efficiency increase, and have great practical significance.

[0091] Through examination, the application can utilize vehicle braking friction heat and motor operation heat for thermoelectric conversion, supplementing clean power for urban rail train operation. The application helps reduce consumption and increase efficiency in the field of public transportation by providing braking energy recovery technology for urban rail transit.

[0092] It should be noted that the application is applied to urban rail trains, and in the braking process of the urban rail trains, the application can realize energy saving and consumption reduction by using energy recovery technologies such as regenerative power generation. In addition to kinetic energy recovery technology, the heat generated by the brake pads / brake discs during high-speed braking of the urban rail trains can also be used to generate power. The heat power generation technology based on the organic Rankine cycle (ORC) adopted by the application has the advantages of simple components, mature theory, and high system efficiency.

[0093] The above only describes the preferred embodiments of the application, and it should be noted that those skilled in the art can make several improvements and refinements without departing from the principles of the application, and these improvements and refinements should also be considered within the protection scope of the application.

Claims

1. A thermal power generation system based on a high-efficiency Rankine cycle, characterized in that: It comprises a working fluid pump (1), a regenerator (3), a coolant heat exchanger (4), a turbine generator (7), a condenser (10) and a liquid storage tank (12); The working fluid outlet of the working fluid pump (1) is connected to one end of the first pipeline branch and one end of the second pipeline branch respectively; The other end of the first pipe branch is connected to the inlet a of the cold side bypass valve (2) of the regenerator; The second outlet c of the cold side bypass valve (2) of the regenerator is connected to the cold side inlet of the regenerator (3); The first outlet b of the cold-side bypass valve (2) of the regenerator intersects with the condensation outlet of the regenerator (3) and is then connected to the working medium inlet of the coolant heat exchanger (4); The working medium outlet of the coolant heat exchanger (4) is respectively connected to the inlet of the turbine bypass valve (5) and the inlet of the turbine inlet valve (6); The outlet of the turbine inlet valve (6) is connected to the working medium inlet on the turbine generator (7); The working medium outlet on the turbine generator (7) is connected to the inlet of the turbine outlet valve (9); The outlet of the turbine outlet valve (9) and the outlet of the turbine bypass valve (5) are connected to the hot side inlet of the regenerator (3) after the flow converges and intersects; The hot side outlet of the regenerator (3) is connected to the working medium inlet of the condenser (10); The working medium outlet of the condenser (10) is connected to the working medium inlet at the top of the liquid storage tank (12); The working fluid outlet at the lower end of the liquid storage tank (12) is connected to the working fluid inlet of the working fluid pump (1); The other end of the second pipe branch is connected to an inlet of a cooling channel in the turbine generator (7) through a turbine cooling inlet valve (13); The other end outlet of the cooling channel in the turbine generator (7) is connected to the working medium inlet of the condenser (10) through the turbine cooling outlet valve (14); The coolant in the coolant heat exchanger is the coolant provided by an external vehicle.

2. The high-efficiency Rankine cycle-based thermal power generation system according to claim 1, characterized in that: A coolant inlet d of the coolant heat exchanger (4) is connected to a coolant outlet on an external vehicle; The coolant outlet e of the coolant heat exchanger (4) is connected to the coolant inlet on the external vehicle.

3. The high-efficiency Rankine cycle-based thermal power generation system according to claim 2, characterized in that: The coolant outlet on the external vehicle is a coolant outlet on a coolant storage chamber of a brake device of the external vehicle, or a coolant outlet on a coolant storage chamber of a motor controller of the external vehicle; Correspondingly, the coolant inlet on the external vehicle is the coolant inlet on the coolant storage chamber of the brake device of the external vehicle, or the coolant inlet on the coolant storage chamber of the motor controller of the external vehicle.

4. The high-efficiency Rankine cycle-based thermal power generation system according to claim 1, characterized in that: The working fluid of the system is R245fa or R1233zd.

5. The thermal power generation system based on a high-efficiency Rankine cycle according to claim 1, characterized in that: Next to the condenser (10), a plurality of cooling fans (11) are provided; The cooling fan (11) is used to blow convection air toward the condenser (10) to cool the condenser (10).

6. The high-efficiency Rankine cycle-based thermal power generation system according to claim 1, characterized in that: The power output port of the turbine generator (7) is connected to the rectifier and the battery pack (8) in sequence via cables.

7. The high-efficiency Rankine cycle-based thermal power generation system according to claim 6, characterized in that: The battery pack (8) includes a plurality of energy storage batteries; Multiple energy storage batteries are connected in parallel, in series, or in series-parallel.

8. The high-efficiency Rankine cycle-based thermal power generation system according to claim 1, characterized in that: The opening pressure of the turbine inlet valve (6) is equal to the working medium inlet design pressure of the turbine generator (7).

9. A control method for a thermal power generation system based on a high-efficiency Rankine cycle according to any one of claims 1 to 8, characterized in that: The following working modes are included: First, the working fluid pump (1) increases the pressure of the low-pressure low-temperature liquid organic working fluid from the liquid storage tank (14) to a high-pressure low-temperature liquid, and delivers it to the inlet of the cold-side bypass valve (2) of the regenerator; Then, the working medium is distributed through the cold side bypass valve (2) of the regenerator and enters the regenerator (3) to absorb the heat of the high-temperature, low-pressure gas from the turbine outlet valve (9), thereby becoming a high-pressure, medium-temperature working medium fluid. The working medium is then mixed with the liquid working medium that has not entered the cold side of the regenerator (3), and then enters the working medium inlet of the coolant heat exchanger (4), where it absorbs the heat of the coolant and becomes a high-pressure, high-temperature working medium gas. If the high-pressure and high-temperature working fluid gas flowing out of the working fluid outlet of the coolant heat exchanger (4) meets the turbine start-up conditions, it enters the turbine generator (7) through the turbine inlet valve (6) to expand and perform work, thereby becoming a low-pressure and high-temperature working fluid gas, and then enters the hot side inlet of the regenerator (3) through the turbine outlet valve (9); If the high-pressure and high-temperature working fluid gas flowing out of the working fluid outlet of the coolant heat exchanger (4) does not meet the turbine start-up conditions, it enters the hot side inlet of the regenerator (3) through the turbine bypass valve (5), and then transfers heat to the cold side working fluid of the regenerator (3), thereby becoming a low-pressure and medium-temperature working fluid. It then enters the condenser (10) to absorb heat and becomes a low-pressure and low-temperature working fluid. Finally, it enters the liquid storage tank (12), thus completing the working fluid cycle.

10. The control method of the thermal power generation system based on the high-efficiency Rankine cycle according to claim 9, characterized in that: The working mode also includes the following processing operations: At the outlet of the working fluid pump (1), a small portion of the high-pressure and low-temperature working fluid is diverted through the turbine cooling inlet valve (13) and enters the cooling channel in the turbine generator (7), thereby taking away the heat of the bearings and motor generated by the turbine of the turbine generator (7) when rotating at high speed, and then flows into the working fluid inlet of the condenser (10) through the turbine cooling outlet valve (14).

Images