CN106703994A - Powertrain system of gas turbine integrated with Rankine cycle - Google Patents

Abstract

The invention provides a powertrain system of a gas turbine integrated with Rankine cycle. The powertrain system comprises a gas turbine system, a Rankine cycle system, a generating system and a battery pack, wherein the gas turbine system is connected with the generating system and is used for driving the generating system to generate power and charge the battery pack, a first heat exchanger is arranged between an exhaust pipe of a turbine of the gas turbine and a pipeline of the Rankine cycle system, and the first heat exchanger is used for transferring heat of exhaust gas discharged from the exhaust pipe of the turbine of the gas turbine to a working medium in the Rankine cycle system and enabling a part of the working medium to vaporize, so that the generating system is driven to generate power and charge the battery pack by the Rankine cycle system. To sum up, the heat of the exhaust gas discharged from the exhaust pipe of the turbine of the gas turbine can be recycled by the Rankine cycle system, and the battery pack can be charged by the Rankine cycle system together with the gas turbine system, so that the efficiency of the range extending type powertrain system can be fully improved, oil consumption of a whole vehicle is reduced, and the endurance mileage of a range extending type electric vehicle is increased.

Description

A gas turbine integrated Rankine cycle powertrain system

technical field

The invention relates to the technical field of automobiles, and in particular to a power assembly system with a gas turbine integrated Rankine cycle.

Background technique

In recent years, in response to the energy crisis and climate change, countries have issued more stringent regulations on fuel consumption and emissions. This has prompted automakers to improve vehicle fuel economy and reduce emissions, and develop new vehicles, while hybrid vehicles, extended-range electric vehicles, and pure electric vehicles have better fuel economy than traditionally powered vehicles. Among them, the extended-range electric vehicle adopts the drive motor to directly drive the wheels, with simple structure and control, and long battery life.

At present, range-extended electric vehicles generally use a piston reciprocating internal combustion engine as a range extender. The range extender does not directly drive the wheels, but starts the internal combustion engine and drives the generator to charge the battery when the battery power is insufficient, so that the range extender can be kept at a constant speed. Work at the best fuel consumption point, thereby improving fuel economy and vehicle cruising range. However, the traditional piston reciprocating internal combustion engine has a large structural volume and mass, which affects the vehicle layout, fuel consumption and power performance, while the thermal efficiency of the micro gas turbine is higher than that of the traditional piston reciprocating internal combustion engine, and does not require additional exhaust after-treatment devices. Therefore, the use of micro gas turbines As a range extender to generate electricity for range-extended electric vehicles, it has a good application prospect. However, for a gas turbine, most of its energy is lost in the form of exhaust heat, so it is necessary to adopt a specific system to recover exhaust heat to improve energy efficiency.

Contents of the invention

In view of this, the present invention provides a gas turbine-integrated Rankine cycle powertrain system that can improve the thermal efficiency of the gas turbine, thereby improving the fuel economy of the entire vehicle of the extended-range electric vehicle.

In order to achieve the above advantages, the present invention provides a gas turbine integrated Rankine cycle powertrain system, which includes a gas turbine system, a Rankine cycle system, a power generation system, and a battery pack. The gas turbine system is connected to the power generation system to drive the power generation system to generate electricity And to charge the battery pack, a first heat exchanger is provided between the exhaust pipe of the gas turbine turbine and the pipeline of the Rankine cycle system, and the first heat exchanger is used to transfer the heat of the exhaust gas discharged from the exhaust pipe of the gas turbine turbine Transfer to the working medium in the Rankine cycle system and vaporize part of the working medium so that the Rankine cycle system drives the power generation system to generate electricity and charge the battery pack.

Further, the gas turbine system includes a compressor, a combustor connected to the outlet of the compressor, and a gas turbine turbine connected to the outlet of the combustor, and the power generation system includes a first generator connected to the compressor, the first generator connected to the compressor Driven to generate electricity to charge the battery pack.

Further, a first rectifier is provided between the first generator and the battery pack.

Further, the Rankine cycle system includes a condenser, a Rankine circulating water pump, a first heat exchanger, and a Rankine cycle turbine, and the Rankine circulating water pump transports the liquid working medium in the Rankine cycle system to the first heat exchanger, Part of the working medium is vaporized at the first heat exchanger and enters the Rankine cycle turbine to drive the Rankine cycle turbine to rotate, and then flows through the condenser to condense and then flows to the first heat exchanger through the Rankine cycle water pump.

Further, the power generation system includes a second generator connected to the Rankine cycle turbine, and driven by the Rankine cycle turbine, the second generator generates electricity to charge the battery pack.

Further, a second rectifier is provided between the second generator and the battery pack.

Further, it also includes a drive motor heat exchange system, which is used to transfer the heat generated by the drive motor to the Rankine cycle system and preheat the working medium in the Rankine cycle system.

Further, the drive motor heat exchange system includes a drive motor cooling water pump, a water storage tank for storing coolant, and a drive motor heat exchange device, and a second heat exchange system is provided between the drive motor heat exchange system and the pipeline of the Rankine cycle system. device.

Further, the heat exchanging device for the driving motor is integrated with the casing of the driving motor.

Further, the second heat exchanger is arranged between the Rankine circulating water pump of the Rankine cycle system and the first heat exchanger.

In summary, since the Rankine cycle system can recover the heat of the exhaust gas discharged from the exhaust pipe of the gas turbine turbine and charge the battery pack together with the gas turbine system, it can fully improve the efficiency of the extended-range powertrain system and reduce the fuel consumption of the vehicle , improve the mileage of extended-range electric vehicles.

Description of drawings

Fig. 1 is a schematic layout diagram of a power assembly system of a gas turbine integrated Rankine cycle according to an embodiment of the present invention.

detailed description

In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, structure, features and effects of the present invention will be described in detail below in conjunction with the accompanying drawings and examples.

As shown in Figure 1, the gas turbine integrated Rankine cycle powertrain system of the present invention includes a gas turbine system 1, a Rankine cycle system 2, a drive motor 17, wheels 18, a drive motor heat exchange system 21, a battery pack 15 and a power generation system .

The power generation system includes a first generator 13 connected to a compressor 5 described below and a second generator 11 connected to a Rankine cycle turbine 9 described below.

The gas turbine system 1 is connected to the power generation system, and is used to drive the power generation system to generate electricity and charge the battery pack 15, which includes a compressor 5, a combustion chamber 3 connected to the outlet of the compressor 5, and a gas turbine turbine connected to the outlet of the combustion chamber 3 4. The output end of the gas turbine 4 is connected to the input end of the first generator 13 , the output end of the first generator 13 is connected to one end of the first rectifier 14 , and the other end of the first rectifier 14 is connected to the battery pack 15 . The battery pack 15 is connected to the input end of the drive motor 17 , and the output end of the drive motor 17 is connected to the wheel 18 .

The driving motor heat exchange system 21 is used to transfer the heat generated by the driving motor 17 to the Rankine cycle system 2 and preheat the working medium in the Rankine cycle system 2 . The driving motor heat exchange system 21 includes a driving motor cooling water pump 19 , a water storage tank 20 for storing cooling liquid, and a driving motor heat exchanging device 16 . The driving motor cooling water pump 19 , the water storage tank 20 and the driving motor heat exchange device 16 constitute a circulation system. The drive motor heat exchange device 16 is integrated with the casing of the drive motor 17, which is more conducive to heat transfer.

The Rankine cycle system 2 includes a condenser 8 , a Rankine cycle water pump 7 , a first heat exchanger 6 , a second heat exchanger 10 and a Rankine cycle turbine 9 . The first heat exchanger 6 is arranged between the exhaust pipe of the gas turbine 4 and the pipeline of the Rankine cycle system 2, and the second heat exchanger 10 is arranged between the driving motor heat exchange system 21 and the pipeline of the Rankine cycle system 2 . The first heat exchanger 6 is used to transfer the heat of the exhaust gas discharged from the exhaust pipe of the gas turbine turbine 4 to the working medium in the Rankine cycle system 2 and vaporize part of the working medium so that the Rankine cycle system 2 generates electricity and supplies power to the battery. Group 15 is charged. The flow direction of the exhaust gas discharged from the exhaust pipe of the gas turbine turbine 4 in the first heat exchanger 6 is opposite to the flow direction of the working medium in the Rankine cycle system 2 in the first heat exchanger 6, and the drive motor in the heat exchange system 21 The flow direction of the cooling liquid in the second heat exchanger 10 is opposite to the flow direction of the working medium in the Rankine cycle system 2 in the second heat exchanger 10 , which is more conducive to heat exchange. In addition, the second heat exchanger 10 is arranged between the Rankine circulating water pump 7 of the Rankine cycle system 2 and the first heat exchanger 6 .

The output end of the Rankine cycle turbine 9 is connected to the input end of the second generator 11 , and the output end of the second generator 11 is connected to the battery pack 15 . In addition, a second rectifier 12 may also be provided between the second generator 11 and the battery pack 15 .

The Rankine circulation water pump 7 transports the liquid working medium in the Rankine circulation system 2 to the second heat exchanger 10 , so that the liquid working medium is preheated in the second heat exchanger 10 . Then the preheated working medium flows to the first heat exchanger 6 . In this way, part of the working medium will vaporize in the first heat exchanger 6 and then enter the Rankine cycle turbine 9, and then make the Rankine cycle turbine 9 work, while the unused gaseous working medium will return to the condenser 8 and be liquefied, and then continue in the It is recycled in the Rankine cycle system 2.

When the battery power of the extended-range electric vehicle is lower than the set value, the gas turbine system 1 starts to work, that is, the fresh air enters the compressor 5, then mixes with fuel in the combustion chamber 3 and burns, and the gas generated by the combustion drives the gas turbine 4 to rotate , and then drive the compressor 5 to rotate, and then drive the first generator to rotate and generate electricity, and then the battery pack 15 is charged through the first rectifier 14 . At the same time, the drive motor heat exchange system 21 starts to work, that is, the drive motor cooling water pump 19 drives the coolant in the water storage tank 20 to flow, and the coolant passes through the drive motor heat exchange device 16 to bring the heat generated by the drive motor 17 to the second The heat exchanger 10 , the heat will be transferred to the Rankine cycle system 2 through the second heat exchanger 10 . The Rankine cycle system 2 starts to work synchronously with the gas turbine system 1 . The Rankine cycle water pump 7 drives the working medium into the second heat exchanger 10 . The temperature of the working medium rises and is preheated and flows into the first heat exchanger 6 . The first heat exchanger 6 is integrated with the exhaust pipe of the gas turbine turbine 4, because the temperature of the exhaust gas discharged from the exhaust pipe of the gas turbine turbine 4 is higher, which will further heat the working medium flowing into the first heat exchanger 6 Vaporize part of the working medium. The gaseous working medium then drives the Rankine cycle turbine 9 to rotate, and the Rankine cycle turbine 9 is connected to the second generator 11 , and the electric energy generated by the second generator 11 charges the battery pack 15 through the second rectifier 12 . The unused gaseous working medium will return to the condenser 8 and be liquefied, and then continue to be recycled in the Rankine cycle system 2 . After the battery pack 15 is fully charged, the gas turbine system 1 stops working, and the Rankine circulating water pump 7 and the driving motor cooling water pump 19 stop working simultaneously.

In summary, since the Rankine cycle system 2 can recover the heat of the exhaust gas discharged from the exhaust pipe of the gas turbine turbine 4 and charge the battery pack 15 together with the gas turbine system 1, it can fully improve the efficiency of the extended-range powertrain system. Reduce the fuel consumption of the vehicle and increase the mileage of the extended-range electric vehicle. In addition, the power generation efficiency of the Rankine cycle system 3 can be further improved by recovering the heat generated by the drive motor 17 to the Rankine cycle system 2 through the drive motor heat exchange system 21 and preheating the working medium in the Rankine cycle system 2, so that the overall Improve the power generation efficiency of the extended-range powertrain system.

The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any skilled person familiar with the profession, Without departing from the scope of the technical solution of the present invention, when the technical content disclosed above can be used to make some changes or be modified into equivalent embodiments with equivalent changes, but as long as it does not depart from the content of the technical solution of the present invention, the technical essence of the present invention is Any simple modifications, equivalent changes and modifications made in the above embodiments still fall within the scope of the technical solution of the present invention.

Claims (10)

1. A gas turbine integrated Rankine cycle powertrain system, which comprises a gas turbine system (1), a Rankine cycle system (2), a power generation system and a battery pack (15), the gas turbine system (1) and the described The power generation system is connected to drive the power generation system to generate electricity and charge the battery pack (15). It is characterized in that the exhaust pipe of the gas turbine turbine (4) and the Rankine cycle system (2) A first heat exchanger (6) is arranged between the pipelines, and the first heat exchanger (6) is used to transfer the heat of the exhaust gas discharged from the exhaust pipe of the gas turbine turbine (4) to the The working medium in the Rankine cycle system (2) vaporizes part of the working medium so that the Rankine cycle system (2) drives the power generation system to generate electricity and charge the battery pack (15). 2. The powertrain system of gas turbine integrated Rankine cycle according to claim 1, characterized in that, the gas turbine system (1) comprises a compressor (5), connected to the outlet of the compressor (5) A combustion chamber (3) and a gas turbine (4) connected to the outlet of the combustion chamber (3), the power generation system includes a first generator (13) connected to the compressor (5), the first Driven by the compressor (5), a generator (13) generates electricity to charge the battery pack (15). 3. The gas turbine integrated Rankine cycle powertrain system according to claim 2, characterized in that a first rectifier (14) is arranged between the first generator (13) and the battery pack (15) ). 4. The power assembly system of gas turbine integrated Rankine cycle as claimed in claim 1, is characterized in that, described Rankine cycle system (2) comprises condenser (8), Rankine circulating water pump (7), described The first heat exchanger (6) and the Rankine cycle turbine (9), the Rankine cycle water pump (7) transports the liquid working medium in the Rankine cycle system (2) to the first heat exchange device (6), so that part of the working medium enters the Rankine cycle turbine (9) after being vaporized at the first heat exchanger (6), drives the Rankine cycle turbine (9) to rotate, and then flows through the After being condensed by the condenser (8), it flows to the first heat exchanger (6) through the Rankine circulating water pump (7). 5. The power assembly system of gas turbine integrated Rankine cycle as claimed in claim 4, is characterized in that, described power generation system comprises the second electrical generator (11) that is connected with described Rankine cycle turbine (9), so Driven by the Rankine cycle turbine (9), the second generator (11) generates electricity to charge the battery pack (15). 6. The gas turbine integrated Rankine cycle powertrain system according to claim 5, characterized in that a second rectifier (12) is arranged between the second generator (11) and the battery pack (15) ). 7. The gas turbine integrated Rankine cycle powertrain system according to claim 1, characterized in that it also includes a drive motor heat exchange system (21), and the drive motor heat exchange system (21) is used to drive The heat generated by the motor (17) is transferred to the Rankine cycle system (2) and preheats the working medium in the Rankine cycle system (2). 8. The gas turbine integrated Rankine cycle powertrain system according to claim 7, characterized in that, the drive motor heat exchange system (21) includes a drive motor cooling water pump (19), a storage tank for storing cooling fluid A water tank (20) and a drive motor heat exchange device (16), a second heat exchanger (10) is provided between the drive motor heat exchange system (21) and the pipeline of the Rankine cycle system (2) . 9. The gas turbine integrated Rankine cycle powertrain system according to claim 8, characterized in that the drive motor heat exchange device (16) is integrated with the casing of the drive motor (17). 10. The powertrain system of gas turbine integrated Rankine cycle as claimed in claim 8, characterized in that, the second heat exchanger (10) is located at the Rankine cycle water pump of the Rankine cycle system (2) (7) and the first heat exchanger (6).