CN212479415U

CN212479415U - Multi-stage inter-cooling gas turbine power generation system combining supercharger and micro-gas turbine

Info

Publication number: CN212479415U
Application number: CN202021301759.0U
Authority: CN
Inventors: 李伟; 王强; 陈雪聪; 胡文彪; 马运昌
Original assignee: North University of China
Current assignee: North University of China
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2021-02-05
Anticipated expiration: 2030-07-06

Abstract

The utility model provides a booster and little combustion engine combined multistage inter-cooling combustion engine power generation system, including one-level compressor, one-level cooler, second grade compressor, second grade cooler, tertiary compressor, regenerator, combustion chamber, one-level turbine, second grade turbine, tertiary turbine, inscription motor, controller, power battery, generator, external motor; the primary compressor is coaxially driven by an internal motor; the secondary compressor is coaxially driven by the tertiary turbine; the three-stage compressor is coaxially driven by the first-stage turbine; the first, second and third turbines are driven by the combustion gas generated by the combustion chamber; waste gas at the air outlet of the secondary turbine transfers the waste heat of the waste gas to pressurized air generated by the tertiary compressor through the heat regenerator, thereby improving the energy utilization of the waste gas, reducing the fuel consumption and improving the heat efficiency of the whole machine; the power battery can be charged by the generator at medium and low electric quantity; the power generation system has the advantages of high power generation efficiency, high power density and high heat efficiency of the gas turbine, and the cruising ability and reliability of electric facility equipment are improved.

Description

Multi-stage inter-cooling gas turbine power generation system combining supercharger and micro-gas turbine

Technical Field

The utility model belongs to the technical field of the gas turbine electricity generation, a gas turbine power generation system that can thermal efficiency is used to electric automobile or aircraft is related to, specifically is a booster and little multistage well heat turbine power generation system that the gas turbine combines.

Background

In recent years, in the face of increasingly severe environment and energy crisis, clean energy has been gaining attention, in which electric vehicles and electric aircrafts represented by electric energy gradually replace traditional combustion engines, and some defects such as short endurance mileage, low energy density, long charging time, few charging positions and the like are highlighted. Through the understanding of the research conditions at the present stage, researchers aim to research battery materials to improve the power density and the capacity of the battery and the like so as to solve the problems, the research on the positive electrode of the battery is not smooth, the research and development period is long, the research and development cost is high, and the problems existing at the present stage cannot be timely and effectively solved, so that the range extender is an alternative solution for solving the problems at present. However, the existing range extender in the market selects a reciprocating internal combustion engine or a single-stage and double-stage turbine micro-combustion engine, and has the problems of low power generation efficiency, low power density, low thermal efficiency and the like.

Disclosure of Invention

The utility model aims at providing a booster and little combustion engine combination's multistage well combustion engine power generation system to solve current journey ware that increases and have the generating efficiency low, power density low and the low scheduling problem of combustion engine thermal efficiency.

The utility model discloses a solve the technical scheme that above-mentioned problem adopted and be:

a multi-stage inter-cooling combustion engine power generation system combining a supercharger and a micro-combustion engine comprises a primary air compressor, a primary cooler, a secondary air compressor, a secondary cooler, a tertiary air compressor, a heat regenerator, a combustion chamber, a primary turbine, a secondary turbine, a tertiary turbine, an internal motor, a controller, a power battery, a generator, an external motor, an air inlet pipe, an exhaust pipe, a transmission shaft and a wire harness, wherein an air outlet of the air inlet pipe is connected with an air inlet of the combustion chamber, an air inlet of the exhaust pipe is connected with an air outlet of the combustion chamber, the primary air compressor, the primary cooler, the secondary compressor, the secondary cooler and the tertiary air compressor are sequentially arranged on the air inlet pipe, the primary turbine, the secondary turbine and the tertiary turbine are sequentially arranged on the exhaust pipe, the low-temperature end of the heat regenerator is connected between the air inlet pipe behind the tertiary, the high-temperature end in the heat regenerator transfers heat to the low-temperature end to perform heat regeneration, the primary compressor is connected with the internal motor through the first transmission shaft, the secondary compressor is connected with the third-stage turbine through the second transmission shaft, the third-stage compressor is connected with the primary turbine through the third transmission shaft, the secondary turbine is connected with the generator through the fourth transmission shaft, and the generator, the power battery, the internal motor and the external motor are respectively connected with the controller through wiring harnesses.

The external motor is connected with the external transmission device or directly connected with the driving device to output power.

The primary compressor, the secondary compressor and the tertiary compressor are all centrifugal compressors, the compression ratio of the primary compressor and the secondary compressor is 2-3, and the compression ratio of the tertiary compressor is 3-4.

The first-stage turbine is an axial-flow turbine or a mixed-flow turbine, the expansion ratio is 2 to 3, the second-stage turbine is a radial-flow turbine or a mixed-flow turbine, the expansion ratio is 2 to 3, the third-stage turbine is a radial-flow turbine, and the expansion ratio is 3 to 4.

Compared with the prior art, the utility model discloses following beneficial effect has: the utility model has the advantages of reasonable design, can obtain higher compression ratio and expansion ratio under lower flow and rotational speed scope, reduce the load of single-stage compressor and turbine, improve the life and the reliability of system, make full use of heat energy improves the whole thermal efficiency of heat engine and generated power simultaneously, and it has the advantage that power density is high, small and compact.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a block diagram of the electric vehicle according to the present invention;

fig. 3 is a block diagram of the present invention applied to an electrically propelled vehicle;

in the figure: 1. a primary compressor; 2. a primary cooler; 3. a secondary compressor; 4. a secondary cooler; 5. a tertiary compressor; 6. a heat regenerator; 7. a combustion chamber; 8. a first stage turbine; 9. a secondary turbine; 10. a three-stage turbine; 11. an inscribing motor; 12. a controller; 13. a power battery; 14. a generator; 15. an external motor; 16. an air inlet pipe; 17. an exhaust pipe; 18. a first transmission shaft; 19. a second transmission shaft; 20. a third transmission shaft; 21. a fourth transmission shaft; 22. a wire harness.

Detailed Description

The structure and the implementation process of the present invention are further explained in detail with reference to the attached drawings as follows:

as shown in fig. 1, the multi-stage inter-cooling combustion engine power generation system combining a supercharger and a micro-combustion engine comprises a primary compressor 1, a primary cooler 2, a secondary compressor 3, a secondary cooler 4, a tertiary compressor 5, a heat regenerator 6, a combustion chamber 7, a primary turbine 8, a secondary turbine 9, a tertiary turbine 10, an internal motor 11, a controller 12, a power battery 13, a generator 14, an external motor 15, an air inlet pipe 16, an exhaust pipe 17, a first transmission shaft 18, a second transmission shaft 19, a third transmission shaft 20, a fourth transmission shaft 21 and a wire harness 22, wherein an air outlet of the air inlet pipe 16 is connected with an air inlet of the combustion chamber 7, an air inlet of the exhaust pipe 17 is connected with an air outlet of the combustion chamber 7, the primary compressor 1, the primary cooler 2, the secondary compressor 3, the secondary cooler 4 and the tertiary compressor 5 are sequentially installed on the air inlet pipe 16, the low-temperature end of the heat regenerator 6 is connected between an air inlet pipe behind the tertiary compressor 5 and an air inlet pipe in front of the combustion chamber 7, the high-temperature end of the heat regenerator is connected between an air outlet pipe behind the secondary turbine 9 and an air outlet pipe in front of the tertiary turbine 10, the high-temperature end in the heat regenerator 6 transfers heat to the low-temperature end to perform heat regeneration, the primary compressor 1 is connected with the internal motor 11 through a first transmission shaft 18, the secondary compressor 3 is connected with the tertiary turbine 10 through a second transmission shaft 19, the tertiary compressor 5 is connected with the primary turbine 8 through a third transmission shaft 20, the secondary turbine 9 is connected with the generator 14 through a fourth transmission shaft 21, and the generator 14, the power battery 13, the internal motor 11 and the external motor 15 are connected.

The primary compressor 1, the secondary compressor 3 and the tertiary compressor 5 are all centrifugal compressors, the compression ratio of the primary compressor 1 and the secondary compressor 3 is 2-3, and the compression ratio of the tertiary compressor 5 is 3-4; the first-stage turbine 8 is an axial-flow or mixed-flow turbine having an expansion ratio of 2 to 3, the second-stage turbine 9 is a radial-flow or mixed-flow turbine having an expansion ratio of 2 to 3, and the third-stage turbine 10 is a radial-flow turbine having an expansion ratio of 3 to 4.

The primary compressor 1 is coaxially driven by an internal motor 11; the secondary compressor 3 is coaxially driven by a tertiary turbine 10; the tertiary compressor 5 is coaxially driven by a primary turbine 8; the first stage turbine 8, the second stage turbine 9 and the third stage turbine 10 are driven by the combustion gas generated by the combustor 7; waste gas at the air outlet of the secondary turbine 9 transfers the waste heat of the waste gas to pressurized air generated by the tertiary compressor 5 through the heat regenerator 6, the temperature of compressed air in an air inlet pipe 16 before a combustion chamber is improved, so that the fuel utilization is reduced, the waste heat of combustion products is fully exerted, the heat efficiency of the whole machine is improved, the waste gas passing through the heat regenerator 6 continuously drives the tertiary turbine 10 to operate through an exhaust pipe 17, the tertiary turbine 10 drives the secondary compressor 3 to operate through a transmission shaft 19, the heat energy of the waste gas is fully utilized, the required power consumption is provided for the secondary compressor, and low-energy waste gas doing work through the tertiary turbine 10 is exhausted to the atmosphere through the; the power battery 13 can be charged by the generator 14 at a medium-low electric quantity; the external motor 15 is directly connected with the external transmission device or connected with the driving device to output power so as to achieve the function of a power generation system.

When the electric quantity of the power battery 13 is low (the charge state is 25-40%), the controller 12 starts the internal connection motor 11 through the wire harness 22, the internal connection motor 11 drives the primary compressor 1 to operate through the first transmission shaft 18, the primary compressor 1 sucks air and then compresses the air, the compressed air is transmitted to the secondary compressor 3 after being cooled by the primary cooler 2 so as to start the secondary compressor 3 to operate, the secondary compressor 3 transmits the compressed high-temperature and high-pressure gas to the secondary cooler 4 for secondary cooling, the cooled high-pressure gas drives the tertiary compressor 5 to operate, the compressed air enters the combustion chamber 7 through the heat regenerator 6 to be combusted, the combusted high-temperature and high-pressure combustion gas product drives the primary turbine 8 to operate through the exhaust pipe 17, the primary turbine 8 drives the tertiary compressor 5 to normally operate through the third transmission shaft 20 so as to reduce the intake load of the primary compressor 1, the exhaust gas at the outlet of the first-stage turbine 8 drives the second-stage turbine 9 to operate through the exhaust pipe 17, the second-stage turbine 9 drives the generator 14 to generate electricity through the fourth transmission shaft 21, the exhaust gas which does work through the second-stage turbine transfers heat to the outlet compressed air of the third-stage compressor 5 through the exhaust pipe 17 through the heat regenerator 6, the reheated exhaust gas continuously enters the third-stage turbine 10 through the exhaust pipe 17 to expand and do work, the third-stage turbine 10 drives the second-stage compressor 3 to normally operate through the second transmission shaft 19, so that the whole machine normally and stably operates, the electric power output by the generator 14 charges the power battery 13 through the wiring harness 22 and maintains the power output of the external motor 15 to ensure the.

If the electric device is in a heavy load state, such as acceleration, ascending, climbing, etc., and high power output is required, the generator 14 and the power battery 13 are powered by the wire harness 22 and the controller 12 to the electric motor 15, so as to meet the power demand.

As shown in fig. 2, the utility model discloses when the electric automobile field is used, external drive arrangement load is big, and it is high to need the output torque, and external motor passes through the coaxial drive transmission system of transmission shaft earlier and slows down, passes through the transmission shaft via transmission system again and is wheel output to satisfy vehicle operation required condition.

As shown in fig. 3, the utility model discloses when the electric aircraft field is used, especially when distributed electric propulsion, it need not too high load, and external drive arrangement needs the output rotational speed high, and the moment of torsion is little, and the speed regulator is controlled external motor rotational speed through the pencil, and at this moment, external motor directly carries out power take off through the transmission shaft to the propeller to satisfy aircraft operation required condition.

Specifically, under the condition of standard atmospheric pressure and 20 ℃ of inlet air temperature, the inlet air is regarded as ideal gas, the whole process is regarded as an isentropic process, the total power of the power generation system is 400kW, the heat insulation power of a first-stage turbine 8 is 170kW, the heat insulation power of a second-stage turbine 9 is 143kW, the heat insulation power of a third-stage turbine 10 is 87kW, the inlet gas temperature of the first-stage turbine 8 is 1300K, the expansion ratio is 2.5, the inlet temperature of the second-stage turbine 9 is 1080K, the outlet temperature of the second-stage turbine 9 is 890K, the expansion ratio is 2.5, the heat exchange efficiency of a regenerator 6 is 75%, the inlet temperature of the third-stage turbine 10 is 535K, the outlet temperature of the third-stage turbine 10 is 390K, the expansion ratio is 3.2, the outlet gas temperature of a third-stage compressor 5 is 465K, the three-stage compression ratio is 8.5, the, the air-fuel ratio is 1.25%, and the theoretical oil consumption rate is 0.25kg/kWh, so that the power generation efficiency of the power generation system can reach 32.5%, and compared with a reciprocating internal combustion engine, the reciprocating internal combustion engine has better fuel economy and reliability, and has higher power generation efficiency and higher heat efficiency than a single-stage or double-stage micro-combustion engine range extender.

Claims

1. The utility model provides a booster and little combustion engine combination's multistage inter-cooling combustion engine power generation system which characterized in that: comprises a primary air compressor (1), a primary cooler (2), a secondary air compressor (3), a secondary cooler (4), a tertiary air compressor (5), a heat regenerator (6), a combustion chamber (7), a primary turbine (8), a secondary turbine (9), a tertiary turbine (10), an internal motor (11), a controller (12), a power battery (13), a generator (14), an external motor (15), an air inlet pipe (16), an exhaust pipe (17), a first transmission shaft (18), a second transmission shaft (19), a third transmission shaft (20), a fourth transmission shaft (21) and a wire harness (22), wherein the air outlet of the air inlet pipe is connected with the air inlet of the combustion chamber, the air inlet of the exhaust pipe is connected with the air outlet of the combustion chamber, and the primary air compressor, the primary cooler, the secondary air compressor, the secondary cooler and the tertiary air compressor are sequentially arranged on the air inlet, the primary turbine, the secondary turbine and the tertiary turbine are sequentially arranged on an exhaust pipe behind the combustion chamber (7), the low-temperature end of the heat regenerator (6) is connected between an air inlet pipe behind the tertiary compressor (5) and an air inlet pipe in front of the combustion chamber (7), the high-temperature end of the heat regenerator (6) is connected between an exhaust pipe behind the secondary turbine (9) and an exhaust pipe in front of the tertiary turbine (10), the primary compressor (1) is connected with the internal connection motor (11) through a first transmission shaft (18), the secondary compressor (3) is connected with the tertiary turbine (10) through a second transmission shaft (19), the tertiary compressor (5) is connected with the primary turbine (8) through a third transmission shaft (20), and the secondary turbine (9) is connected with the generator (14) through a fourth transmission shaft (21), the generator (14), the power battery (13), the internal connection motor (11) and the external connection motor (15) are respectively connected with the controller (12) through a wiring harness (22).

2. The multi-stage inter-cooling combustion engine power generation system combining the supercharger and the micro-combustion engine as claimed in claim 1, wherein: the primary compressor (1) and the secondary compressor (3) are centrifugal compressors, and the compression ratio of the centrifugal compressors is 2-3.

3. The multi-stage inter-cooling combustion engine power generation system combining the supercharger and the micro-combustion engine as claimed in claim 1, wherein: the three-stage compressor (5) is a centrifugal compressor, and the compression ratio of the three-stage compressor is 3-4.

4. The multi-stage inter-cooling combustion engine power generation system combining the supercharger and the micro-combustion engine as claimed in claim 1, wherein: the first-stage turbine (8) is an axial-flow or mixed-flow turbine having an expansion ratio of 2 to 3.

5. The multi-stage inter-cooling combustion engine power generation system combining the supercharger and the micro-combustion engine as claimed in claim 1, wherein: the secondary turbine (9) is a radial or mixed flow turbine with an expansion ratio of 2 to 3.

6. The multi-stage inter-cooling combustion engine power generation system combining the supercharger and the micro-combustion engine as claimed in claim 1, wherein: the three-stage turbine (10) is a radial turbine with an expansion ratio of 3 to 4.