Li / sf6 metal fuel closed cycle power system and its control strategy

Abstract

The application discloses a Li / SF_6 metal fuel closed cycle power system, which comprises a steam generator connected with a boiler reactor, lithium blocks are placed in the boiler reactor, the boiler reactor is connected with an oxidant storage cabin with SF_6 through a valve, a starting propellant column is connected with the boiler reactor, a water supply structure is connected with the steam generator through a pipeline at an inlet of the steam generator, and an outlet of the steam generator is connected with a turbine through a pipeline, a temperature sensor is connected with the outer wall of the boiler reactor, and the temperature sensor, the starting propellant column, a valve control structure and a water supply structure are all connected with a starting control module. Temperature monitoring is realized through the temperature sensor, pressure regulation of different pipelines is realized through multiple stop valves, and the system is safely and stably started through the regulation and control of temperature and pressure in the starting process. According to the control strategy of the application, the valve opening and closing are controlled through the starting control module, the safe starting of the cycle power system can be realized, and the cycle power system can continuously and safely and reliably work, and the cycle power system is convenient for human remote control.

Description

Technical Field

[0001] This invention belongs to the field of power system control technology, specifically relating to a Li / SF6 metal fuel closed-cycle power system, and also to a control strategy for the Li / SF6 metal fuel closed-cycle power system. Background Technology

[0002] The existing Li / SF6 metal fuel closed-cycle power system mainly includes the following components: extrusion unit, heat pipe reactor, evaporator, condenser, micro turbine, generator, liquid collector, and pump. The general startup process is as follows: Lithium is stored at room temperature in the boiler reactor. After an ignition command is issued, the shut-off valve of the extrusion unit's water tank opens, and the tank begins supplying water to the steam generator 8. The propellant column also begins combustion, and the high temperature generated by the reaction heats the lithium to a certain temperature, turning it into a molten state. Sulfur hexafluoride oxidant stored in the oxidant tank enters the boiler reactor through a regulator, reacting rapidly with the molten lithium to release a large amount of heat. Part of the energy generated heats the working fluid in the spiral tube of the reactor wall into superheated steam, and part of the energy gradually heats the lithium to its operating temperature. The resulting superheated steam then enters the turbine to begin operation. During this process, the temperature of the boiler reactor may rise slowly, causing the water in the spiral tube to not evaporate in time. Liquid water may then enter the turbine at the boiler reactor outlet, preventing it from driving the turbine and causing system startup failure. Furthermore, the opening and closing times of the extrusion unit's shut-off valve, the start-up time and flow rate of the oxidizer, and the ignition time of the starting propellant all significantly impact the normal startup of the system. In summary, the startup process of the Li / SF6 metallic fuel closed-cycle power system has many problems that seriously affect the safe startup and reliable continuous operation of the power system.

[0003] While the stable operation control and regulation of existing Li / SF6 metallic fuel closed-cycle power systems are relatively mature, research on the control and regulation of the startup process is limited, and the cost of experimental regulation is high. Unlike the stable operation of the power system, the startup process is more complex. If the temperature rises slowly in the boiler reactor, the water in the spiral tubes cannot evaporate in time, and liquid water will enter the turbine at the boiler reactor outlet, preventing the turbine from outputting shaft power and causing system startup failure. Therefore, the correctness of the startup process control logic directly determines whether the power system can operate safely and stably. Summary of the Invention

[0004] The purpose of this invention is to provide a Li / SF6 metal fuel closed-cycle power system that solves the problems of complex start-up process and unstable start-up control in existing systems.

[0005] Another objective of this invention is to provide a control strategy for a Li / SF6 metal fuel closed-cycle power system that enables safe startup and reliable continuous operation of the power system.

[0006] The first technical solution adopted in this invention is a Li / SF6 metal fuel closed-cycle power system, including a steam generator, a boiler reactor connected inside the steam generator, a lithium block placed inside the boiler reactor, the boiler reactor connected to an oxidant tank containing SF6 through a valve control structure, a starter charge connected inside the boiler reactor, a water supply structure connected to the inlet of the steam generator through a pipe, and a pipe connected to the outlet of the steam generator to the turbine blades, a temperature sensor connected to the outer wall of the boiler reactor, and the temperature sensor, starter charge, valve control structure, and water supply structure all connected to a starter control module, with the turbine coaxially connected to a load.

[0007] The invention is further characterized by:

[0008] The water supply structure includes a water tank for the extrusion device, which is connected to a high-pressure gas cylinder. The outlet of the water tank is connected to the inlet of the steam generator via water pipe a. Water pipe a is connected to the shut-off valve of the water tank for the extrusion device. The inlet of the steam generator is also connected in sequence to water pipe b, water pump, water pipe c, liquid collector, water pipe d, condenser, and water pipe e. Water pipe e is connected to the bottom of the turbine. The turbine and water pump are connected via a reducer. Water pipe c is connected to the shut-off valve of the liquid collector. Both the shut-off valve of the liquid collector and the shut-off valve of the water tank for the extrusion device are connected to the start-up control module.

[0009] The bottom of the liquid collector is connected to the inlet of the steam generator via a water pipe f. An overflow valve is connected to the water pipe f, and the overflow valve is connected to the start-up control module.

[0010] The valve control structure includes an oxidant pipeline, one end of which is connected to an oxidant storage tank, and the other end is connected to an oxidant nozzle. The oxidant nozzle is connected to the boiler reactor. An oxidant storage tank shut-off valve and an oxidant flow regulating valve are connected to the oxidant pipeline. Both the oxidant storage tank shut-off valve and the oxidant flow regulating valve are connected to the start-up control module.

[0011] The start-up control module includes a start-up battery, which is connected to a control component. The control component is connected to a temperature sensor, a start-up cartridge, a valve control structure, and a water supply structure.

[0012] The steam generator contains a spiral tube, which is connected to the water supply structure. The other end of the spiral tube is the outlet of the steam generator.

[0013] The second technical solution adopted in this invention is a control strategy for a Li / SF6 metallic fuel closed-cycle power system, which uses a Li / SF6 metallic fuel closed-cycle power system, including:

[0014] The starting control module ignites the starting propellant, generating high-temperature, high-pressure gas that melts the lithium block in the combustion chamber. A temperature sensor detects when the boiler reactor's outer wall temperature reaches the Li / SF6 reaction temperature. The starting control module then opens the valve control structure, allowing SF6 from the oxidant storage tank to enter the combustion chamber. There, it reacts with the molten lithium, releasing a large amount of heat. When the temperature exceeds 500°C, the starting control module controls the water supply structure to supply water to the steam generator inlet, outputting steam at the steam generator outlet, which then enters the turbine to perform work.

[0015] The specific process of the start-up control module controlling the water supply structure to supply water to the inlet of the steam generator is as follows: When the water supply is started, the start-up control module closes the liquid collector shut-off valve and opens the extrusion device water tank shut-off valve. Pressure is applied to the extrusion device water tank through the high-pressure gas cylinder, forcing the water in the extrusion device water tank into the steam generator. When water vapor is generated at the outlet of the steam generator, it enters the turbine to do work. At the same time, the water supply pump is started, the liquid collector shut-off valve is opened, and the water in the liquid collector is transported to the steam generator. The pressure in the high-pressure gas cylinder decreases. When the pressure in the extrusion device water tank is lower than the opening pressure of the extrusion device water tank shut-off valve, the extrusion device water tank shut-off valve is automatically closed.

[0016] The bottom of the liquid collector is connected to the inlet of the steam generator via a water pipe f. An overflow valve is connected to the water pipe f, and the overflow valve is connected to the start control module. After the water supply pump is started, the overflow valve is opened through the start control module.

[0017] The beneficial effects of this invention are:

[0018] The Li / SF6 metal fuel closed-cycle power system of this invention monitors temperature through a temperature sensor, regulates pressure in different pipelines through multiple shut-off valves, and enables the system to start up safely and operate continuously and reliably by controlling the temperature / pressure during startup.

[0019] According to the control strategy of the Li / SF6 metal fuel closed-cycle power system of the present invention, the valve opening and closing can be controlled by the start-up control module, which can realize the safe start-up of the cycle power system and carry out safe and reliable continuous operation, and facilitates remote control by humans. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the Li / SF6 metallic fuel closed-cycle power system of the present invention;

[0021] Figure 2 This is a schematic diagram of the stable operating condition control strategy of the Li / SF6 metal fuel closed-cycle power system of the present invention.

[0022] In the diagram, 1-starting battery, 2-control components, 3-oxidant storage tank, 4-high pressure gas cylinder, 5-extrusion unit water tank, 6-oxidant storage tank shut-off valve, 7-extrusion unit water tank shut-off valve, 8-steam generator, 9-turbine, 10-load, 11-condenser, 12-liquid collector, 13-liquid collector shut-off valve, 14-water supply pump, 15-overflow valve, 16-oxidant nozzle, 17-temperature sensor, 18-boiler reactor, 19-starting propellant column, 20-oxidant flow regulating valve, 21-lithium block. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0024] Example 1

[0025] The Li / SF6 metallic fuel closed-cycle power system of the present invention, such as Figure 1 As shown, the system includes a steam generator 8, a boiler reactor 18 connected to the steam generator 8, a lithium block 21 placed inside the boiler reactor 18, and an oxidant storage tank 3 containing SF6 connected to the boiler reactor 18 via a valve control structure. A starting propellant 19 is connected inside the boiler reactor 18. The inlet of the steam generator 8 is connected to a water supply structure via a pipe, and the outlet is connected to the turbine blades directly opposite the turbine 9 via a pipe. A temperature sensor 17 is connected to the outer wall of the boiler reactor 18. The temperature sensor 17, the starting propellant 19, the valve control structure, and the water supply structure are all connected to a start-up control module. The turbine 9 is coaxially connected to a load 10. The temperature sensor 17 detects the temperature of the outer wall of the boiler reactor 18 and transmits the detected temperature information to the start-up control module for controlling the operation of each component. When the temperature at the measuring point reaches the Li / SF6 reaction temperature, the start-up control module controls the propellant 19 to ignite and burn, generating high-temperature, high-pressure gas to heat the boiler reactor 18, causing the lithium block to melt and react with the SF6 entering the combustion chamber, releasing a large amount of heat. The water in the steam generator 8 is heated to produce steam, which then enters the turbine 9 through pipes to perform work. The start-up control module adjusts the start / stop of various parts according to the detected temperature and the pressure of the water supply structure, enabling safe and stable control of the start-up process.

[0026] Example 2

[0027] In this embodiment, the water supply structure is divided into two stages: the start-up water supply stage and the stable water supply stage. The specific structure includes an extrusion device water tank 5, which is connected to a high-pressure gas cylinder 4. The outlet of the extrusion device water tank 5 is connected to the inlet of the steam generator 8 via a water pipe a. The water pipe a is connected to the extrusion device water tank shut-off valve 7, which is used to open / close the water in the extrusion device water tank 5 into the steam generator 8. The inlet of the steam generator 8 is also connected in sequence to a water pipe b, a water supply pump 14, a water pipe c, a liquid collector 12, a water pipe d, a condenser 11, and a water pipe e. The water pipe e is connected to the bottom of the turbine 9, forming a closed loop with the steam generator 8. The turbine 9 is connected to the water supply pump 14 via a reducer. When the turbine 9 is working, it can open the water supply pump 14. The water pipe c is connected to the liquid collector shut-off valve 13. The liquid collector shut-off valve 13 and the extrusion device water tank shut-off valve 7 are both connected to the start-up control module.

[0028] During the water supply startup phase, the shut-off valve 7 of the extrusion device water tank is opened, and the shut-off valve 13 of the liquid collector is closed. Water is supplied to the steam generator 8 by the high-pressure gas cylinder 4 through the extrusion device water tank 5. After the steam in the steam generator 8 enters the turbine 9 to do work, the water supply pump 14 is started, and the shut-off valve 13 of the liquid collector is opened. As the extrusion process continues, the pressure of the gas cylinder 4 in the extrusion device continuously decreases. When the pressure of the water tank 5 in the extrusion device is lower than the opening pressure of the extrusion device water tank shut-off valve 7, the extrusion device water tank shut-off valve 7 automatically closes, and the extrusion process ends. At this time, the water in the steam generator 8 is supplied by the water supply pump 14.

[0029] During the stable water supply phase, water is supplied to the steam generator 8 independently via the water supply pump 14.

[0030] Since the water in the steam generator 8 comes from two sources, the water flow rate will inevitably increase. The bottom of the liquid collector 12 is connected to the inlet of the steam generator 8 through a water pipe f. An overflow valve 15 is connected to the water pipe f. The overflow valve 15 is connected to the start control module. The overflow valve 15 can adjust the overflow pressure of the valve body, so that the flow rate of the water medium supplied to the steam generator 8 tends to be stable.

[0031] Example 3

[0032] In this embodiment, the valve control structure includes an oxidant pipeline. One end of the oxidant pipeline is connected to the oxidant storage tank 3, and the other end is connected to the oxidant nozzle 16. The oxidant nozzle 16 is connected to the boiler reactor 18. An oxidant storage tank shut-off valve 6 and an oxidant flow regulating valve 20 are connected to the oxidant pipeline. Both the oxidant storage tank shut-off valve 6 and the oxidant flow regulating valve 20 are connected to the start-up control module. The oxidant storage tank shut-off valve 6 allows SF6 from the oxidant storage tank 3 to enter the steam generator 8. The oxidant flow regulating valve 20 adjusts the inflow rate, thereby controlling the reaction between SF6 and lithium. The use of the oxidant nozzle 16 allows for a more uniform distribution of SF6 entering the combustion chamber, which is beneficial for a complete reaction.

[0033] The start-up control module includes a start-up battery 1, which is connected to a control component 2. The control component 2 is connected to a temperature sensor 17, a start-up cartridge 19, a valve control structure, and a water supply structure.

[0034] The steam generator 8 contains a spiral tube, which is connected to the water supply structure. The other end of the spiral tube is the outlet of the steam generator 8. The spiral tube structure in the steam generator 8 can extend the water heating distance in the steam generator 8, making the heating more complete.

[0035] Example 4

[0036] This invention relates to a control strategy for a Li / SF6 metallic fuel closed-cycle power system. The stability control in this invention mainly consists of two control loops: an engine speed control loop and a steam generator 8 outlet temperature control loop. The specific process is as follows:

[0037] like Figure 2As shown, the starting control module ignites the starting propellant 19, generating high-temperature, high-pressure gas that melts the lithium block 21 in the combustion chamber. Temperature sensor 17 detects when the temperature of the outer wall of the steam generator 8 reaches the Li / SF6 reaction temperature. The starting control module then opens the valve control structure, allowing SF6 from the oxidant storage tank 3 to enter the combustion chamber, reacting with the molten lithium and releasing a large amount of heat. When the temperature exceeds 500°C, the starting control module controls the water supply structure to supply water to the inlet of the steam generator 8. Upon water supply startup, the starting control module closes the liquid collector shut-off valve 13 and opens the extrusion device water tank shut-off valve 7, pressurizing the extrusion device water tank 5 through the high-pressure gas cylinder 4, forcing the water in the extrusion device water tank 5 into the steam generator 8. Part of the heat in the boiler reactor 18 is used to continue heating the lithium block 21, and most is used to heat the spiral tube in the steam generator 8, converting the water in the spiral tube into superheated steam. A temperature sensor 17 is installed at the outlet of the steam generator 8 to monitor the temperature of the superheated steam in real time. Superheated steam enters the turbine 9 from the outlet of the steam generator 8 to perform work, and the turbine 9 starts working. Since the turbine 9 is mechanically connected to the water supply pump 14 via a reducer, after the turbine 9 starts working, it will transfer some of the shaft power to the water supply pump 14, and the water supply pump 14 will start. The control component 2 will start supplying power to the shut-off valve 13 of the liquid collector 12, and the liquid collector 12 will open. The water supply pump 14 pressurizes the water in the liquid collector 12 and inputs it into the inner spiral tube of the steam generator 8. At this time, the water in the steam generator 8 comes from the extrusion device and the liquid collector 12. After the water in the liquid collector 12 is delivered to the steam generator 8, the pressure in the high-pressure gas cylinder 4 decreases. When the pressure in the water tank 5 of the extrusion device is lower than the opening pressure of the shut-off valve 7 of the extrusion device water tank, the shut-off valve 7 of the extrusion device water tank will automatically close. After the water supply pump 14 is started, the overflow valve 15 is opened through the start-up control module. The invention controls the start-up and stable phases of the water supply through the start-up control module, which can realize the safe start-up and reliable continuous operation of the power system.

[0038] Using a Li / SF6 metallic fuel closed-cycle power system, after normal startup, all the energy released from the reaction in the steam generator 8 is used to heat the water working fluid, generating superheated steam to drive the turbine 9, which in turn drives the water supply pump 14 and provides shaft power to the propeller. The exhaust steam after expansion and work enters the condenser 11 and condenses into water, which enters the liquid collector 12. Then, the water supply pump pressurizes the water and feeds it back into the boiler reactor for heating, thus performing closed-cycle operation of the water working fluid. At this point, the system enters the stable operating condition control phase.

[0039] In this invention, the control of the startup control module is divided into two stages:

[0040] The first control stage primarily focuses on regulating the oxidant flow rate. After the outlet temperature of steam generator 8 and the engine speed stabilize, the oxidant flow rate is fine-tuned using the set speed as a reference to achieve the set turbine engine speed. At this point, the overflow process of the working fluid after water pump 14 can be disregarded. A closed-loop control algorithm is introduced in this control stage to precisely control the outlet temperature of steam generator 8 and the turbine engine speed. The specific process is as follows: a mathematical model for fluid calculation in the three phase zones of steam generator 8 is established, and incremental PI control is added before the parameter calculation modules for the three phase zones. Based on the initial design parameters of the boiler reactor and the fluid properties, a disturbance is introduced at time t1 after the turbine speed reaches steady-state operation for a period of time. The disturbance continues until time t2. The disturbance is generated by increasing or decreasing the mass flow rate of SF_6. This increase or decrease in the mass flow rate of SF_6 is reflected in the heat generated by the reaction between SF_6 and Li, and is ultimately reflected in the change of heat flux density on the pipe wall. Therefore, the heat flux density on the pipe wall is essentially the same as the mass flow rate of SF_6, and using heat flux density for calculation is more convenient. Thus, the disturbance signal can be represented by the change in heat flux density on the pipe wall instead of the change in the mass flow rate of SF_6. That is, during the time period t1 to t2, the heat flux density increases linearly to 1.1 times the initial heat flux density q0; during the time period t2 to t3, the heat flux density remains constant at 1.1q0; from time t3, a disturbance is introduced again, continuing until time t4. During the time period t3 to t4, the heat flux density decreases linearly to the initial heat flux density q0; during the time period t4 to t5, the heat flux density remains constant at q0; the simulation ends at time t6. Further simulations and experiments are needed to determine the dynamic response characteristics of the power system to changes in oxidant flow rate.

[0041] The second control stage primarily focuses on regulating the water flow rate. The outlet temperature of steam generator 8 is set, and the overflow valve after the water supply pump is adjusted to regulate the flow rate of the working fluid entering the steam generator. This controls the outlet temperature of the spiral tube, preventing the turbine inlet temperature from becoming too high or too low, which could cause the steam generator 8 to dry-burn and fail, or allow the working fluid to enter the turbine. The specific process is as follows: An incremental PI control program is added after the mathematical model of the three phase regions of the steam generator 8. When the simulation time t > t1, the control program is executed. First, the desired value T of the steam generator 8 outlet temperature is set. set The controlled quantity is the outlet temperature T of steam generator 8. end The discrete formula for incremental PI is as follows:

[0042] Δu(i)=u(i)-u(i-1)=K p {e(i)-e(i-1)}+K i e(i)

[0043] e(i) = T end -Tset

[0044] In the formula, Δu(i) is the increment of the control quantity, which is the mass flow rate of the inlet water of the steam generator 8, K p K is the proportionality coefficient. i Let be the integral coefficient, and e(i) be the deviation. The output at the current time is then obtained using the following formula:

[0045] u(i) = u(i-1) + Δu(i)

[0046] To ensure stable regulation, the ratio of the mass flow rate of the inlet water of the steam generator 8 at two adjacent time points is limited. If the mass flow rate at the later time point differs from that at the earlier time point by more than 20%, the mass flow rate at the later time point is set to 1.2 times or 0.8 times the mass flow rate at the earlier time point, depending on the direction of change. The water quality control process will be further improved to obtain its response characteristics.

[0047] Through the above methods, the Li / SF6 metal fuel closed-cycle power system of this invention monitors temperature using a temperature sensor, regulates pressure in different pipelines using multiple shut-off valves, and ensures safe startup and reliable continuous operation through temperature / pressure control during startup. According to the control strategy of the Li / SF6 metal fuel closed-cycle power system of this invention, the valve opening and closing is controlled by the startup control module, enabling safe startup and reliable continuous operation of the cycle power system, and facilitating remote human control.

Claims

1. A control strategy for a Li / SF6 metallic fuel closed-cycle power system, characterized in that, The power system includes a steam generator (8), which is connected to a boiler reactor (18). A lithium block (21) is placed inside the boiler reactor (18). The boiler reactor (18) is connected to an oxidant tank (3) containing SF6 via a valve control structure. A starting propellant column (19) is connected inside the boiler reactor (18). The inlet of the steam generator (8) is connected to a water supply structure via a pipe, and the outlet is connected to the turbine (9) blades via a pipe. A temperature sensor (17) is connected to the outer wall of the boiler reactor (18). The temperature sensor (17), the starting propellant column (19), the valve control structure, and the water supply structure are all connected to a starting control module. The turbine (9) is coaxially connected to a load (1). 0); The water supply structure includes a water tank (5) for the extrusion device, which is connected to a high-pressure gas cylinder (4). The outlet of the water tank (5) is connected to the inlet of the steam generator (8) via a water pipe a. The water pipe a is connected to the water tank shut-off valve (7) for the extrusion device. The inlet of the steam generator (8) is also connected in sequence to a water pipe b, a water supply pump (14), a water pipe c, a liquid collector (12), a water pipe d, a condenser (11), and a water pipe e. The water pipe e is connected to the bottom of the turbine (9). The turbine (9) is connected to the water supply pump (14) via a reducer. The water pipe c is connected to the liquid collector shut-off valve (13). The liquid collector shut-off valve (13) and the water tank shut-off valve (7) for the extrusion device are both connected to the start-up control module. The control strategy includes: igniting the starting charge (19) through the start-up control module to generate high-temperature and high-pressure gas, which melts the lithium block (21) in the combustion chamber. The temperature sensor (17) detects when the temperature of the outer wall of the boiler reactor (18) reaches the Li / SF6 reaction temperature. The start-up control module then opens the valve control structure, allowing SF6 from the oxidant storage tank (3) to enter the combustion chamber, react with the molten lithium in the combustion chamber, and release a large amount of heat. When the temperature exceeds 500°C, the start-up control module controls the water supply structure to supply water to the inlet of the steam generator (8), outputting steam at the outlet of the steam generator (8) to perform work on the turbine (9). The start-up control module controls the water supply structure to supply water to the steam generator (9). The specific process of water supply at the inlet of 8) is as follows: When water supply is started, the liquid collector shut-off valve (13) is closed by starting the control module, the extrusion device water tank shut-off valve (7) is opened, and the high-pressure gas cylinder (4) applies pressure to the extrusion device water tank (5) to squeeze the water in the extrusion device water tank (5) into the steam generator (8). When steam is generated at the outlet of the steam generator (8), it enters the turbine (9) to do work. At the same time, the water supply pump (14) is started, the liquid collector shut-off valve (13) is opened, and the water in the liquid collector (12) is transported to the steam generator (8). The pressure in the high-pressure gas cylinder (4) decreases. When the pressure in the extrusion device water tank (5) is lower than the opening pressure of the extrusion device water tank shut-off valve (7), the extrusion device water tank shut-off valve (7) is automatically closed.

2. The control strategy for the Li / SF6 metallic fuel closed-cycle power system according to claim 1, characterized in that, The bottom of the liquid collector (12) is connected to the inlet of the steam generator (8) via a water pipe f. An overflow valve (15) is connected to the water pipe f, and the overflow valve (15) is connected to the start-up control module.

3. The control strategy for the Li / SF6 metallic fuel closed-cycle power system according to claim 1, characterized in that, The valve control structure includes an oxidant pipeline, one end of which is connected to an oxidant tank (3) and the other end is connected to an oxidant nozzle (16). The oxidant nozzle (16) is connected to a boiler reactor (18). An oxidant tank shut-off valve (6) and an oxidant flow regulating valve (20) are connected to the oxidant pipeline. Both the oxidant tank shut-off valve (6) and the oxidant flow regulating valve (20) are connected to the start-up control module.

4. The control strategy for the Li / SF6 metallic fuel closed-cycle power system according to claim 1, characterized in that, The start-up control module includes a start-up battery (1), which is connected to a control component (2). The control component (2) is connected to a temperature sensor (17), a start-up cartridge (19), a valve control structure, and a water supply structure.

5. The control strategy for the Li / SF6 metallic fuel closed-cycle power system according to claim 1, characterized in that, The steam generator (8) contains a spiral tube, which is connected to a water supply structure. The other end of the spiral tube is the outlet of the steam generator (8).

6. The control strategy for the Li / SF6 metallic fuel closed-cycle power system according to claim 1, characterized in that, The bottom of the liquid collector (12) is connected to the inlet of the steam generator (8) via a water pipe f. An overflow valve (15) is connected to the water pipe f. The overflow valve (15) is connected to the start control module. After the water supply pump (14) is started, the overflow valve (15) is opened through the start control module.

Images