CN104481697B - A kind of combustion gas, diesel oil and supercritical carbon dioxide generating boats and ships power-driven system - Google Patents
A kind of combustion gas, diesel oil and supercritical carbon dioxide generating boats and ships power-driven system Download PDFInfo
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- CN104481697B CN104481697B CN201410741203.6A CN201410741203A CN104481697B CN 104481697 B CN104481697 B CN 104481697B CN 201410741203 A CN201410741203 A CN 201410741203A CN 104481697 B CN104481697 B CN 104481697B
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 179
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 89
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 89
- 239000002283 diesel fuel Substances 0.000 title claims abstract description 4
- 239000000567 combustion gas Substances 0.000 title abstract 2
- 238000010248 power generation Methods 0.000 claims abstract description 42
- 230000005611 electricity Effects 0.000 claims abstract description 13
- 239000012530 fluid Substances 0.000 claims description 47
- 239000000446 fuel Substances 0.000 claims description 42
- 239000000110 cooling liquid Substances 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 8
- 239000002699 waste material Substances 0.000 claims description 5
- 239000007789 gas Substances 0.000 abstract description 96
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
A kind of combustion gas, diesel oil and supercritical carbon dioxide generating boats and ships power-driven system, it is generated electricity by gas turbine generating system, for whole boats and ships provide electric energy, diesel engine unit power generation system is as auxiliary generating system, the high-temperature exhaust air of gas turbine is as the thermal source of supercritical carbon dioxide brayton cycle power generation system, realize supercritical carbon dioxide Bretton power cycle, electric energy is produced by carbon dioxide turbine drawing generator group, the electric energy of various power generation system generation above, propeller cavitation power system and ship business electrical distribution system is distributed to by electric control system.The present invention combines gas turbine generating system, diesel engine unit power generation system, supercritical carbon dioxide brayton cycle power generation system, electric control system and propeller cavitation power system, improve efficiency of energy utilization, and provide stable power supply, provide new thinking for Gas Turbine Power System and supercritical carbon dioxide Bretton power cycle in the utilization of ship domain simultaneously.
Description
Technical Field
The invention belongs to the technical field of electric power energy, and particularly relates to a power driving system for a gas, diesel and supercritical carbon dioxide power generation ship.
Background
The increasing energy consumption and strict emission limits in the marine industry require operators to reevaluate the economics of marine power plants, and these trends provide a platform for the development of high efficiency energy technologies for commercial and military vessels. One very promising solution is Exhaust Heat Recovery (EHR), which uses carbon dioxide as a working fluid, a technology that increases energy efficiency and has the advantages of compactness and low maintenance, which are advantageous for marine facilities.
The basic idea is similar to the steam power cycle which has been used for 100 years, but the traditional water vapor working medium is replaced by carbon dioxide, and the system has more advantages than the original system: 1. the efficiency is higher; 2. the temperature adaptability is wider, and the volume is smaller; 3. the system pipeline is less corrosive and easier to maintain.
The recovery of exhaust steam energy is very common in steam circulation, and the exhaust heat boilers adopted by cargo ships, cruise ships and the like generate steam from the discharged steam heat, and the generated steam has a plurality of auxiliary functions on the ships, including heating, auxiliary engine power, fuel preheating, shipborne kitchens and even can drive a carbon dioxide turbine to generate certain electric energy. Gas powered vessels also employ a steam bottoming cycle to improve overall system efficiency.
By utilizing the phenomenon of physical property mutation of the supercritical fluid near the critical temperature, the operating point of the compressor is arranged in a high-density area near the critical temperature, and the operating point of the heat exchanger is arranged in a low-density area behind the critical temperature, so that the compression power consumption can be reduced and the higher efficiency can be realized on the premise of ensuring the gas cooling. The property of the supercritical fluid has obvious advantages when the supercritical fluid is used as an energy conversion working medium. Carbon dioxide (CO)2) Because the critical pressure of the working fluid is relatively moderate (7.38MPa), the working fluid has better stability and nuclear physical properties, shows the properties of inert gas in a certain temperature range, has the characteristics of no toxicity, rich reserves, natural existence and the like, and is considered to be one of the energy transmission and energy conversion working fluids with the most application prospect. Due to supercritical carbon dioxide (S-CO)2) Has high density and no phase change in a certain operating parameter range, and is used as supercritical carbon dioxide (S-CO)2) The power system equipment such as a compressor, a gas turbine and the like for working media has compact structure and smaller volume. Each combination of brayton cycles can produce 20MW of power, occupying only four cubic meters of space. Supercritical carbon dioxide (S-CO)2) Brayton (Brayton) cycle turbines are commonly used in large thermal and nuclear power generation applications, including next generation power reactors, with the goal of ultimately replacing steam driven rankine' sA circulating turbine (less efficient, corrosive in high temperature conditions, and 30 times more space is occupied due to the very large turbine and condenser required to handle the excess steam).
Disclosure of Invention
The invention aims to provide a power driving system of a gas, diesel and supercritical carbon dioxide power generation ship, which can improve the energy utilization efficiency, provide a stable power supply and simultaneously provide a gas turbine power system and supercritical carbon dioxide (S-CO)2) The Brayton (Brayton) power cycle provides a new idea for the application in the field of ships.
In order to achieve the purpose, the invention adopts the technical scheme that:
a gas, diesel and supercritical carbon dioxide power generation ship power driving system comprises a gas turbine power generation system, a diesel engine set power generation system, a supercritical carbon dioxide Brayton cycle power generation system, a power control system and a propeller power system; wherein,
the gas turbine power generation system comprises a compressor, wherein an air inlet is formed in the compressor, an outlet of the compressor is connected with an air inlet of a combustor, a fuel inlet of the combustor is connected with an outlet of a fuel storage device, an outlet of the combustor is connected with an inlet of a gas turbine, and the gas turbine is connected with a gas turbine generator through a shaft system;
the diesel engine set power generation system comprises a diesel engine set, and the diesel engine set is connected with a diesel engine set generator through a shaft system;
the supercritical carbon dioxide Brayton cycle power generation system comprises a heat exchanger, wherein a waste steam inlet of the heat exchanger is respectively connected with an outlet of a gas turbine and an exhaust outlet of a diesel engine unit, a fluid outlet of the heat exchanger is communicated with an inlet of a carbon dioxide turbine, the carbon dioxide turbine is connected with a carbon dioxide turbine generator through a shafting, an outlet of the carbon dioxide turbine is connected with a high-temperature side fluid inlet of a heat regenerator, a high-temperature side fluid outlet of the heat regenerator is connected with a supercritical carbon dioxide inlet of a condenser, a supercritical carbon dioxide outlet of the condenser is connected with an inlet of a supercritical carbon dioxide fluid pump, an outlet of the supercritical carbon dioxide fluid pump is communicated with a low-temperature side fluid inlet of the heat regenerator, a low-temperature side fluid outlet of the heat regenerator is communicated with a fluid inlet of the heat exchanger, a cooling liquid outlet of the condenser is communicated with an;
the power control system comprises a central alternating current bus and ports thereof, wherein a current input port of the central alternating current bus is respectively connected with current output ports of a gas turbine generator, a diesel engine set generator and a carbon dioxide turbine generator;
the propeller power system comprises a motor set, a current input port of the motor set is connected with a current output port of the central alternating current bus, and the motor set is connected with the propeller power device through a shaft system.
The invention further improves the following steps: a fuel control valve is arranged on a connecting pipeline between the outlet of the fuel storage device and the fuel inlet of the combustor, and a gas turbine heat exchange exhaust valve is arranged on a connecting pipeline between the outlet of the gas turbine and the exhaust steam inlet of the heat exchanger; a diesel engine set heat exchange exhaust valve is arranged on a connecting pipeline between an exhaust outlet of the diesel engine set and a dead steam inlet of the heat exchanger; the pipeline of the outlet of the gas turbine to the atmosphere is provided with a gas turbine exhaust valve, and the pipeline of the exhaust outlet of the diesel engine set to the atmosphere is provided with a diesel engine set exhaust valve.
The invention further improves the following steps: in the whole power system, a diesel engine set generator is used as an auxiliary power generation system, when the diesel engine set generator normally works, a diesel engine set heat exchange exhaust valve, a gas turbine exhaust valve and the diesel engine set exhaust valve are closed, a fuel control valve and a gas turbine heat exchange exhaust valve are opened, at the moment, a gas turbine normally works to drive the gas turbine generator to generate power, air compressed by a compressor and fuel flowing out of a fuel storage device are mixed and combusted in a combustor, in the combustor, chemical energy is converted into heat energy, high-temperature gas is formed to enter the gas turbine to do work and drive the gas turbine generator to generate power, the heat energy is converted into mechanical energy, after the work is done, exhaust steam of the gas turbine enters a heat exchanger to exchange heat, and the exhaust steam after heat exchange is discharged from a gas outlet of the heat exchanger to provide electric energy for the; when an accident occurs and the gas turbine generator set cannot normally work, the fuel control valve, the gas turbine heat exchange exhaust valve, the gas turbine exhaust valve and the diesel engine set exhaust valve are closed at the moment, the diesel engine set heat exchange exhaust valve is opened, the diesel engine set generator starts to work to generate electricity, fuel enters the diesel engine set to burn, the diesel engine set is pushed to do work, chemical energy of the fuel is converted into heat energy to push the diesel engine set to do work, the diesel engine set drives the diesel engine set generator to generate electricity, the burned exhaust enters the heat exchanger to exchange heat, and the exhaust after heat exchange is discharged from a gas outlet of the heat exchanger;
the low-temperature low-pressure carbon dioxide gas is compressed and boosted by the supercritical carbon dioxide fluid pump, is preheated by the high-temperature side fluid of the heat regenerator, enters the heat exchanger for heat exchange, directly enters the carbon dioxide turbine for acting after absorbing heat, drives the steam turbine generator to generate power, is cooled by the condenser to the required inlet temperature of the supercritical carbon dioxide fluid pump after being cooled by the low-temperature side fluid of the heat regenerator, and finally enters the supercritical carbon dioxide fluid pump from the outlet of the condenser to realize closed circulation;
the central alternating current bus receives electric energy from the gas turbine generator, the diesel engine set generator and the carbon dioxide turbine generator through a power grid, and then the electric energy is distributed through the central alternating current bus;
the motor unit obtains electric energy from the central alternating current bus to operate, and then the propeller power device is driven to rotate through the shafting, so that the ship is driven to advance.
Compared with the prior art, the invention has the following technical effects:
the invention generates electricity through a gas turbine power generation system, and comprisesThe whole ship provides electric energy, a diesel engine set power generation system is used as an auxiliary power generation system, and high-temperature exhaust gas of a gas turbine is used as supercritical carbon dioxide (S-CO)2) Heat source of Brayton cycle power generation system for supercritical carbon dioxide (S-CO)2) The Brayton power cycle drags the generator set to generate electric energy through the carbon dioxide turbine, the electric energy generated by the various power generation systems is distributed to the propeller power system and the marine power distribution system through the electric control system, the energy utilization efficiency is improved, and a stable power supply is provided. The invention integrates a gas turbine power generation system, a diesel engine set power generation system and supercritical carbon dioxide (S-CO)2) A Brayton (Brayton) cycle power generation system, a power control system and a propeller power system improve energy utilization efficiency and provide a stable power supply source while providing a gas turbine power system and supercritical carbon dioxide (S-CO) power2) The application of Brayton power cycle in the field of ships provides a new idea.
Drawings
FIG. 1 is a schematic structural diagram of a power driving system of a gas, diesel and supercritical carbon dioxide power generation ship of the invention;
in the figure: 1. the system comprises a compressor, 2, a combustor, 3, a gas turbine, 4, a fuel storage device, 5, a gas turbine generator, 6, a diesel unit, 7, a diesel unit generator, 8, a central alternating current bus, 9, a motor, 10, a propeller power system, 11, a heat exchanger, 12, a heat regenerator, 13, a carbon dioxide turbine, 14, a carbon dioxide turbine generator, 15, a condenser, 16, a supercritical carbon dioxide fluid pump, 17, a cooling liquid pump, F1, a fuel control valve, F2, a gas turbine heat exchange exhaust valve, F3, a diesel unit heat exchange exhaust valve, F4, a gas turbine exhaust valve, F5 and a diesel unit exhaust valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the power driving system for a gas, diesel and supercritical carbon dioxide power generation ship comprises a gas turbine power generation system, a diesel engine set power generation system and supercritical carbon dioxide (S-CO)2) A Brayton (Brayton) cycle power generation system, an electrical control system, and a propeller power system.
Wherein, the gas turbine power generation system comprises a compressor 1, a combustor 2, a gas turbine 3, a fuel storage device 4, a gas turbine generator 5, a fuel control valve F1 and a gas turbine heat exchange exhaust valve F2, an inlet of the compressor 1 is communicated with an air inlet, an outlet of the compressor 1 is connected with an air inlet of the combustor 2, a fuel inlet of the combustor 2 is connected with an outlet of the fuel storage device 4, an outlet of the combustor 2 is connected with an inlet of the gas turbine 3, an outlet of the gas turbine 3 is connected with a waste steam inlet of a heat exchanger 11, the gas turbine 3 is connected with the gas turbine generator 5 through a shaft system, the gas turbine generator 5 is connected with a central AC bus 8 through a power grid, a fuel control valve F1 is installed on a fuel inlet connecting pipeline of the outlet of the fuel storage device 4 and the combustor 2, a gas turbine heat exchange exhaust valve F2 is installed on a connecting pipeline of the outlet of the gas turbine 3 and the waste steam, a pipeline of the outlet of the gas turbine 3 leading to the atmosphere is provided with a gas turbine exhaust atmosphere valve F4; air compressed by the compressor 1 and fuel flowing out of the fuel storage device 4 are mixed and combusted in the combustor 2, chemical energy is converted into heat energy in the combustor 2, high-temperature gas is formed and enters the gas turbine 3 to do work to drive the gas turbine generator 5 to generate electricity, the heat energy is converted into mechanical energy, after the work is done, exhaust gas of the gas turbine 3 selectively enters the heat exchanger 11 to exchange heat according to conditions, and exhaust steam after heat exchange is exhausted from a gas outlet of the heat exchanger 11 (at the moment, a gas turbine exhaust gas valve F4 is closed, and a gas turbine heat exchange exhaust valve F2 is opened), or is directly exhausted into the atmosphere through a bypass pipeline (at the moment, a gas turbine heat exchange exhaust gas valve F2 is closed, and a gas turbine exhaust gas valve F4 is opened).
The diesel set power generation system comprises a diesel set 6, a diesel set generator 7, a diesel set heat exchange exhaust valve F3 and a diesel set atmospheric exhaust valve F5, wherein the diesel set 6 is connected with the diesel set generator 7 through a shaft system, the diesel set generator 7 is connected with a central alternating current bus 8 through a power grid, an exhaust outlet of the diesel set 6 is connected with an exhaust steam inlet of a heat exchanger 11, a diesel set heat exchange exhaust valve F3 is installed on a connecting pipeline of the exhaust outlet of the diesel set 6 and the exhaust steam inlet of the heat exchanger 11, and a diesel set atmospheric exhaust valve F5 is installed on a pipeline leading the exhaust outlet of the diesel set 6 to the atmosphere; the pretreated fuel enters the diesel engine set 6 to be combusted, chemical energy of the fuel is converted into heat energy, the diesel engine set 6 is pushed to do work, the heat energy is converted into mechanical energy to drive the diesel engine generator 7 to generate electricity, the combusted exhaust enters the heat exchanger 11 to exchange heat according to conditions, and the heat-exchanged exhaust is discharged from a gas outlet of the heat exchanger 11 (at the moment, an exhaust valve F5 for the atmosphere of the diesel engine set is closed, and a heat-exchange exhaust valve F3 for the diesel engine set is opened), or is directly discharged into the atmosphere through a bypass pipeline (at the moment, a heat-exchange exhaust valve F3 for the diesel engine set is closed, and an exhaust valve F5. In the whole power system, the diesel engine set generator 7 is used as an auxiliary power generation system, and when the diesel engine set generator works normally, closing the diesel set heat exchange exhaust valve F3, the gas turbine exhaust valve F4 and the diesel set exhaust valve F5, opening the fuel control valve F1 and the gas turbine heat exchange exhaust valve F2, and driving the gas turbine generator 5 to generate electricity by the normal operation of the gas turbine 3, air compressed by the compressor 1 and fuel flowing from the fuel storage 4 are mixed and combusted in the combustor 2, in the combustor 2, chemical energy is converted into heat energy, high-temperature gas is formed and enters the gas turbine 3 to do work to drive the gas turbine generator 5 to generate electricity, the heat energy is converted into mechanical energy, after the work is done, the exhaust steam of the gas turbine 3 enters a heat exchanger 11 for heat exchange, and the exhaust steam after heat exchange is discharged from a gas outlet of the heat exchanger 11 to provide electric energy for the whole power system; when an accident occurs and the gas turbine generator set cannot normally work, the fuel control valve F1, the gas turbine heat exchange exhaust valve F2, the gas turbine exhaust valve F4 and the diesel set exhaust valve F5 are closed at the moment, the diesel set heat exchange exhaust valve F3 is opened, the diesel set generator starts to work to generate electricity, fuel enters the diesel set 6 to burn, the diesel set 6 is pushed to do work, chemical energy of the fuel is converted into heat energy, the diesel set 6 is pushed to do work, the diesel set 6 drives the diesel set generator 7 to generate electricity, the burnt exhaust enters the heat exchanger 11 to exchange heat, and the heat exchanged exhaust is exhausted from a gas outlet of the heat exchanger 11.
Supercritical carbon dioxide (S-CO)2) The Brayton (Brayton) cycle power system comprises a heat exchanger 11, a heat regenerator 12, a carbon dioxide turbine 13, a carbon dioxide turbine generator 14, a condenser 15 and a supercritical carbon dioxide fluid pump 16, wherein a waste steam inlet of the heat exchanger 11 is respectively connected with an outlet of a gas turbine 3 and an exhaust outlet of a diesel unit 6, a fluid outlet of the heat exchanger 11 is communicated with an inlet of the carbon dioxide turbine 13, the carbon dioxide turbine 13 is connected with the carbon dioxide turbine generator 14 through a shaft system, the carbon dioxide turbine generator 14 is connected with a central alternating current bus 8 through a power grid, an outlet of the carbon dioxide turbine 13 is connected with a high-temperature side fluid inlet of the heat regenerator 12, a high-temperature side fluid outlet of the heat regenerator 12 is connected with a supercritical carbon dioxide inlet of the condenser 15, a supercritical carbon dioxide outlet of the condenser 15 is connected with an inlet, the outlet of the supercritical carbon dioxide fluid pump 16 is communicated with the low-temperature side fluid inlet of the heat regenerator 12, the low-temperature side fluid outlet of the heat regenerator 12 is communicated with the fluid inlet of the heat exchanger 11, the cooling liquid outlet of the condenser 15 is communicated with the inlet of the cooling liquid pump 17, and the cooling liquid inlet of the condenser 15 is communicated with the outlet of the cooling liquid pump 17; the low-temperature and low-pressure carbon dioxide gas is compressed and boosted by a supercritical carbon dioxide fluid pump 16, is preheated by a high-temperature side fluid of a heat regenerator 12, enters a heat exchanger 11 for heat exchange, directly enters a carbon dioxide turbine 13 for acting after absorbing heat to drive a steam turbine generator 14 to generate power, and exhaust gas after acting is cooled by a low-temperature side fluid in the heat regenerator 12, is cooled to the required inlet temperature of the supercritical carbon dioxide fluid pump 16 by a condenser 15, and finally enters the supercritical carbon dioxide fluid pump 16 from an outlet of the condenser 15 to realize closed circulation.
The power control system comprises a central alternating current bus 8 and a port thereof, wherein a current input port of the central alternating current bus 8 is respectively connected with current output ports of a gas turbine generator 5, a diesel engine set generator 7 and a carbon dioxide turbine generator 14, and a current output port of the central alternating current bus 8 is respectively connected with a motor set 9 and a marine power distribution current input port; the central ac bus 8 receives electric power from the gas turbine generator 5, the diesel generator 7, and the carbon dioxide turbine generator 14 from the grid, and distributes the electric power via the central ac bus 8.
The propeller power system comprises a motor set 9 and a propeller power device 10, wherein a current input port of the motor set 9 is connected with a current output port of the central alternating current bus, and the motor set 9 is connected with the propeller power device 10 through a shaft system; the motor unit 9 obtains electric energy from the central alternating current bus 8 to operate, and then drives the propeller power device 10 to rotate through the shafting, so that the ship is driven to advance.
Supercritical carbon dioxide (S-CO)2) Brayton (Brayton) cycle power system, due to supercritical carbon dioxide (S-CO)2) Has high density and no phase change in a certain operating parameter range, and is used as supercritical carbon dioxide (S-CO)2) The power system equipment such as a working medium compressor, a gas turbine and the like has compact structure and smaller volume, thereby saving the cost and the space.
Claims (3)
1. The utility model provides a gas, diesel oil and supercritical carbon dioxide electricity generation boats and ships power-driven system which characterized in that: the system comprises a gas turbine power generation system, a diesel engine set power generation system, a supercritical carbon dioxide Brayton cycle power generation system, a power control system and a propeller power system; wherein,
the gas turbine power generation system comprises a compressor (1), wherein an air inlet is formed in the compressor (1), an outlet of the compressor (1) is connected with an air inlet of a combustor (2), a fuel inlet of the combustor (2) is connected with an outlet of a fuel storage device (4), an outlet of the combustor (2) is connected with an inlet of a gas turbine (3), and the gas turbine (3) is connected with a gas turbine generator (5) through a shafting;
the diesel engine set power generation system comprises a diesel engine set (6), wherein the diesel engine set (6) is connected with a diesel engine set generator (7) through a shaft system;
the supercritical carbon dioxide Brayton cycle power generation system comprises a heat exchanger (11), wherein a dead steam inlet of the heat exchanger (11) is respectively connected with an outlet of a gas turbine (3) and an exhaust outlet of a diesel unit (6), a fluid outlet of the heat exchanger (11) is communicated with an inlet of a carbon dioxide turbine (13), the carbon dioxide turbine (13) is connected with a carbon dioxide turbine generator (14) through a shaft system, an outlet of the carbon dioxide turbine (13) is connected with a high-temperature side fluid inlet of a heat regenerator (12), a high-temperature side fluid outlet of the heat regenerator (12) is connected with a supercritical carbon dioxide inlet of a condenser (15), a supercritical carbon dioxide outlet of the condenser (15) is connected with an inlet of a supercritical carbon dioxide fluid pump (16), an outlet of the supercritical carbon dioxide fluid pump (16) is communicated with a low-temperature side fluid inlet of the heat regenerator (12), and a low-temperature side fluid outlet of the heat regenerator (12) is communicated with a fluid inlet of the, a cooling liquid outlet of the condenser (15) is communicated with an inlet of a cooling liquid pump (17), and a cooling liquid inlet of the condenser (15) is communicated with an outlet of the cooling liquid pump (17);
the power control system comprises a central alternating current bus (8) and ports thereof, wherein a current input port of the central alternating current bus (8) is respectively connected with current output ports of a gas turbine generator (5), a diesel set generator (7) and a carbon dioxide turbine generator (14);
the propeller power system comprises a motor set (9), a current input port of the motor set (9) is connected with a current output port of the central alternating current bus, and the motor set (9) is connected with a propeller power device (10) through a shaft system.
2. The gas, diesel and supercritical carbon dioxide power generation marine power drive system of claim 1, characterized in that: a fuel control valve (F1) is arranged on a connecting pipeline of an outlet of the fuel storage device (4) and a fuel inlet of the combustor (2), and a gas turbine heat exchange exhaust valve (F2) is arranged on a connecting pipeline of an outlet of the gas turbine (3) and a waste steam inlet of the heat exchanger (11); a diesel set heat exchange exhaust valve (F3) is arranged on a connecting pipeline between an exhaust outlet of the diesel set (6) and a dead steam inlet of the heat exchanger (11); and an exhaust outlet of the diesel engine set (6) is provided with an exhaust valve (F5).
3. The gas, diesel and supercritical carbon dioxide power generation marine power drive system of claim 2, characterized in that:
in the whole power system, a diesel engine set generator (7) is used as an auxiliary power generation system, when the power system normally works, a diesel engine set heat exchange exhaust valve (F3), a gas turbine exhaust valve (F4) and a diesel engine set exhaust valve (F5) are closed, a fuel control valve (F1) and a gas turbine heat exchange exhaust valve (F2) are opened, at the moment, a gas turbine (3) normally works to drive a gas turbine generator (5) to generate power, air compressed by a compressor (1) and fuel flowing out of a fuel storage device (4) are mixed and combusted in a combustor (2), chemical energy is converted into heat energy in the combustor (2), high-temperature gas is formed to enter the gas turbine (3) to do work to drive the gas turbine generator (5) to generate power, the heat energy is converted into mechanical energy, after the work is done, exhaust steam of the gas turbine (3) enters a heat exchanger (11) to exchange heat, the exhaust steam after heat exchange is discharged from a gas outlet of the heat exchanger (11) to provide electric energy for the whole power system; when an accident occurs and the gas turbine generator set cannot normally work, the fuel control valve (F1), the gas turbine heat exchange exhaust valve (F2), the gas turbine exhaust valve (F4) and the diesel set exhaust valve (F5) are closed at the moment, the diesel set heat exchange exhaust valve (F3) is opened, the diesel set generator starts to work to generate electricity, fuel enters the diesel set (6) to burn, the diesel set (6) is pushed to do work, chemical energy of the fuel is converted into heat energy, the diesel set (6) is pushed to do work, the diesel set (6) drives the diesel set generator (7) to generate electricity, burnt exhaust enters the heat exchanger (11) to exchange heat, and heat-exchanged exhaust is exhausted from a gas outlet of the heat exchanger (11);
the low-temperature and low-pressure carbon dioxide gas is compressed and boosted by a supercritical carbon dioxide fluid pump (16), is preheated by a high-temperature side fluid of a heat regenerator (12), enters a heat exchanger (11) for heat exchange, directly enters a carbon dioxide turbine (13) for acting after absorbing heat, drives a steam turbine generator (14) to generate power, and exhaust gas after acting is cooled by a low-temperature side fluid in the heat regenerator (12), is cooled to the required inlet temperature of the supercritical carbon dioxide fluid pump (16) by a condenser (15), and finally enters the supercritical carbon dioxide fluid pump (16) from the outlet of the condenser (15) to realize closed circulation;
the central alternating current bus (8) receives electric energy from the gas turbine generator (5), the diesel set generator (7) and the carbon dioxide turbine generator (14) through a power grid, and then the electric energy is distributed through the central alternating current bus (8);
the motor unit (9) obtains electric energy from the central alternating current bus (8) to operate, and then drives the propeller power device (10) to rotate through the shafting, so that the ship is driven to advance.
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| CN201410741203.6A CN104481697B (en) | 2014-12-05 | 2014-12-05 | A kind of combustion gas, diesel oil and supercritical carbon dioxide generating boats and ships power-driven system |
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