A method and system for combined heat and power generation in a fusion reactor

Abstract

The application discloses a kind of method and system of fusion reactor combined heat and power, belong to nuclear energy comprehensive utilization and combined heat and power technical field.Under the demand of fusion reactor combined heat and power, for the contradiction of heat and power that traditional steam extraction heating leads to the decline of power generation, and the problem of fusion reactor pulse intermittent operation, in the pulse operation period of fusion reactor, the heat source of divertor directly supplies heat to the outside, and the heat source of blanket is used for power generation, to realize the complete decoupling of heat and power;During pulse intermittent period, the heat released by the energy storage system is proportionally shunted, while maintaining continuous power generation and heat supply.The application completely eliminates the occupation of core power generation by heat supply, and does not need to configure energy storage for divertor alone, to ensure the dual continuity and stability of heat supply and power generation in the whole cycle with lower system complexity, and improves the overall economic benefit of power plant.

Description

Technical Field

[0001] This invention belongs to the field of nuclear energy comprehensive utilization and cogeneration technology, specifically relating to a fusion reactor cogeneration method and system. Background Technology

[0002] Currently, nuclear energy, as a clean and efficient energy source, has received widespread attention. Combined heat and power (CHP) can simultaneously provide electricity and heat, making it an important way to improve the overall energy utilization rate and a significant demand in the nuclear energy market. In the future commercial operation of fusion power plants, how to effectively utilize the heat generated by the fusion reaction to improve the overall economic efficiency and energy utilization rate of the power plant is a pressing engineering and technical problem that needs to be solved.

[0003] In traditional combined heat and power (CHP) systems, external heat supply typically employs a turbine extraction method: a portion of steam is drawn from the intermediate-pressure or low-pressure cylinder of the turbine, heats it through a heat exchanger in the heating network, and then the heat is transferred externally. This method is mature and reliable, but it has an inherent flaw: the heating steam is directly drawn from the main power generation cycle, and an increase in the amount of extracted steam inevitably leads to a decrease in power generation, creating a conflict between heat and power output. Therefore, traditional CHP systems usually switch operating modes between the heating and non-heating seasons to balance power and heat output. This conflict is considered an inherent constraint in conventional systems and has not been fundamentally resolved.

[0004] Currently, various energy conversion and storage solutions have been proposed by the industry to address the utilization of multiple heat sources (cladding, divertor, vacuum chamber) and the pulsed operation characteristics of fusion devices. These solutions mainly focus on smoothing pulsed output to stabilize power generation, but there are still significant shortcomings in how to achieve combined heat and power (CHP) efficiently and without loss in the commercial application of fusion power plants. Existing typical solutions mainly adopt the idea of ​​integrating the heat from the divertor into the Rankine cycle feedwater preheating loop, advocating energy cascade utilization. This type of solution deeply binds the divertor to the main power generation cycle. When the power plant needs to provide commercial heating, the heat from the divertor has already been consumed internally, and heating can still only be provided by steam extraction from the turbine, and the conflict between heat and power energy remains. In addition, the divertor heat source has pulse fluctuation characteristics. Directly connecting it to the feedwater regeneration system will disturb the temperature of the main cycle feedwater, increasing the difficulty of controlling the stable operation of the turbine.

[0005] Compared to traditional cogeneration systems, fusion reactor cogeneration faces two unique constraints that prevent existing solutions from being directly adopted:

[0006] First, fusion reactors have pulsed operation characteristics, with the heat source returning to near zero almost instantaneously during intermittent periods, unlike the continuous and stable heat source output in traditional thermal power plants. This requires the heating system to complete the heat source switching within seconds and rely on the energy storage system to maintain continuous heating during intermittent periods, rather than relying solely on the steady-state design during operation.

[0007] Secondly, the working fluid in the heat source loop of a fusion reactor is radioactive. During intermittent operation, the divertor loop must be isolated to prevent safety issues such as thermal stress fatigue and material creep failure caused by overcooling of the loop under heat source-free conditions. Traditional cogeneration systems do not have such radioactive working fluid isolation constraints, and their operating logic cannot provide direct reference for fusion reactor scenarios.

[0008] It is worth noting that the concentrated solar power (CSP) field also faces the problem of heat source intermittency, and a relatively mature solution combining energy storage buffering with heat source switching has been developed. However, the fundamental difference between the intermittent characteristics of CSP plants and fusion reactors lies in the following: the intermittency of CSP plants stems from the alternation of day and night, with a time scale of minutes to hours, and the heat source power changes slowly, allowing the system ample time to respond; in contrast, the plasma in a fusion reactor extinguishes instantly after the pulse ends, and the heat power returns to almost zero synchronously, with extremely short pulse intervals, requiring the thermal control system to complete seamless switching within seconds. Furthermore, CSP plants do not have the safety constraints of radioactive working fluids and loop isolation, and their heat source switching logic does not need to consider hard cut-off isolation requirements, thus it cannot be directly applied to the cogeneration scenario of fusion reactors.

[0009] Therefore, there is an urgent need for a system architecture that can decouple power generation and heating during operation and utilize energy storage systems to maintain continuous cogeneration during intermittent periods, in order to explore a stable and lossless value-added profit model for fusion power plants. Summary of the Invention

[0010] To address the issue of reduced power generation due to steam extraction for heating in traditional cogeneration systems (i.e., competition between heat and power), and the technical challenges posed by the pulsed operation and radioactive working fluid isolation requirements of existing fusion reactors, this invention provides a fusion reactor cogeneration method and system. Through a diversion mechanism between an independent divertor heating network and a shared energy storage system, the competition between heat and power is completely eliminated. This eliminates the need for dedicated divertor energy storage, ensuring dual continuity of power supply and radiation isolation safety throughout the entire lifecycle. This invention completely eliminates the crowding out of core power generation by heating, eliminates the need for separate energy storage for the divertor, and ensures dual continuity and stability of heating and power generation throughout the entire lifecycle with relatively low system complexity, thereby improving the overall economic efficiency of the power plant.

[0011] To achieve the above objectives, the present invention adopts the following technical solution:

[0012] A method for cogeneration in a fusion reactor involves the following steps: During the pulsed operation of the fusion reactor, heat generated by the divertor is directly exported for external heating, while heat generated by the blanket is dedicated to driving power generation, thus decoupling power generation and heating. During the intermittent operation of the fusion reactor, heat stored in the loop containing the blanket is extracted and proportionally diverted to maintain continuous power generation and continue external heating. When switching from the pulsed operation to the intermittent operation, the loop containing the divertor is isolated, and the flow path is switched simultaneously, proportionally diverting the heat released by the energy storage system shared by the loop containing the blanket. The diverted main flow is directed to the power generation module to maintain continuous power generation, while the diverted bypass flow is directed to the heating module to maintain external heating.

[0013] This invention also provides a fusion reactor cogeneration system for implementing the aforementioned fusion reactor cogeneration method, comprising a fusion reactor heat source subsystem and a cogeneration subsystem; the fusion reactor heat source subsystem includes an independently operating blanket and a divertor, used to absorb high-temperature heat and medium-low-temperature heat from the fusion reactor, respectively; the cogeneration subsystem includes a power generation module, a heating module, and a fluid distribution network; the power generation module receives high-temperature heat to drive the main cycle for power generation, and the heating module receives medium-low-temperature heat to output heat load; through switching of the fluid distribution network, during the fusion reactor pulse operation period, the heat from the divertor is independently introduced into the heating module for heating; during the fusion reactor pulse interval, the heat from the energy storage system in the loop containing the blanket is extracted and introduced into the heating module for continued heating.

[0014] In summary, considering the extremely short pulse intermittent characteristics of fusion reactor plasma, characterized by instantaneous extinction and near-synchronous zeroing of thermal power, this invention proposes a dual-mode operation control strategy with an energy storage system as the energy hub. During the fusion reactor pulse operation period, the energy storage system is dedicated to smoothing the blanket heat source pulse and driving power generation. During the fusion reactor pulse intermittent period, the heat released by the energy storage system is diverted according to the thermoelectric ratio, with the main circuit maintaining power generation and the bypass circuit replacing the isolated divertor to maintain external heat supply. Adjusting the bypass opening can flexibly respond to different thermoelectric load demands without modifying any hardware. This invention is a solution that integrates energy storage, power generation, and heat supply, eliminating the need for a separate additional energy storage system for the divertor, and achieving dual continuity and stability of grid output and heat load throughout the entire pulse cycle with minimal system complexity.

[0015] Beneficial effects:

[0016] 1. To address the problem in existing technologies where the extraction of steam from the turbine for heating leads to a decrease in power generation, this invention completely separates the divertor circuit from the main power generation cycle (cladding heat source) both physically and thermodynamically. During the pulse operation of the fusion reactor, heating directly utilizes the heat from the divertor, without consuming the high-temperature steam used for power generation. This fundamentally eliminates the crowding out of core power generation by heating, thus preserving the power plant's electricity revenue.

[0017] 2. To address the challenge of intermittent heat source interruptions in the divertor caused by pulsed operation of the fusion reactor, this invention designs a logic-switching pipeline network based on four sets of three-way valves and a shared energy storage system. This achieves a seamless transition between "direct heating from the divertor" during operation and "heating alternatively supplied by the energy storage system" during off-peak periods. This invention ensures the continuity of external heating load throughout the entire cycle without requiring a separate, expensive energy storage unit for the divertor.

[0018] 3. This invention changes the existing practice of forcibly using the low-temperature heat in the divertor for inefficient power generation (such as the ORC organic Rankine cycle), resulting in thermal losses. Based on the principles of temperature matching and tiered utilization, this invention dedicates the high-temperature heat energy of the cladding to high-efficiency power generation, while directly using the low-temperature heat in the divertor for residential or industrial heating. This differentiated utilization model significantly reduces thermal losses during heat transfer, substantially improving the overall thermal efficiency and economy of fusion power plants.

[0019] 4. Compared to the complex steam extraction modifications of traditional fission reactors or independent low-grade power generation systems, this invention directly utilizes the inherent divertor heat source of the fusion reactor and simplifies the piping logic by sharing a common intermediate energy storage system as an energy buffer. The system requires low initial construction investment and is easy to maintain in the later stages, providing a value-added profit path for the commercial operation of fusion power plants without sacrificing core power generation benefits. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a fusion reactor cogeneration system according to the present invention.

[0021] The attached figures are labeled as follows: 1-cladding; 2-energy storage system; 3-power generation module; 4-heating module; 5-divertor; 6-steam generator; 7-heating heat exchanger; 8-low temperature heat source heat exchanger; 9-first three-way valve; 10-second three-way valve; 11-third three-way valve; 12-fourth three-way valve; 13-isolation valve; 14-circulating working fluid pump; 15-molten salt heating heat exchanger. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0023] like Figure 1 As shown, a fusion reactor cogeneration system of the present invention is composed of a fusion reactor heat source subsystem and a cogeneration subsystem coupled together.

[0024] The fusion reactor heat source subsystem includes a blanket 1 and a divertor 5. The blanket 1 and divertor 5 employ different cooling media loops and operate within different temperature ranges. The blanket 1 is typically a high-temperature heat source, while the divertor 5 is a medium- to low-temperature heat source.

[0025] The cogeneration subsystem includes a power generation module 3, a heating module 4, a low-temperature heat source heat exchanger 8, a heating heat exchanger 7, a molten salt extraction heating heat exchanger 15, and a core valve group for operating condition switching—a first three-way valve 9, a second three-way valve 10, a third three-way valve 11, and a fourth three-way valve 12. In the cladding cooling medium loop, the cladding 1 transfers heat to the steam generator 6 through the energy storage system 2. In the divertor cooling medium loop, the outlet of the divertor 5 is connected to the hot-side inlet of the low-temperature heat source heat exchanger 8 via a circulating medium pump 14; the hot-side outlet of the low-temperature heat source heat exchanger 8 is connected back to the inlet of the divertor 5 via an isolation valve 13, forming a closed-loop circulation loop.

[0026] The piping of the cogeneration subsystem achieves flexible distribution of multiple heat energy sources through a logical combination of four three-way valves (first three-way valve 9, second three-way valve 10, third three-way valve 11, and fourth three-way valve 12):

[0027] 1. Energy storage side diversion pipeline:

[0028] The outlet of the energy storage system 2 is connected to the inlet of the first three-way valve 9. The first three-way valve 9 has two outlet branches. The first branch is connected to the hot side inlet of the steam generator 6 to drive the power generation module 3 to generate electricity; the second branch is connected to the hot side inlet of the molten salt heat exchanger 15 to extract molten salt from the energy storage system for direct heating during intermittent periods.

[0029] 2. Selection of heating source pipelines:

[0030] The second three-way valve 10 has two inlets. The first inlet is connected to the cold-side outlet of the molten salt heat exchanger 15, and the second inlet is connected to the cold-side outlet of the low-temperature heat source heat exchanger 8. The outlet of the second three-way valve 10 is connected to the hot-side inlet of the heat exchanger 7. During the fusion reactor pulse operation period, the heat source is introduced from the low-temperature heat source heat exchanger 8 side, and during the fusion reactor pulse interval period, it is introduced from the molten salt heat exchanger 15 side. After the two heat sources are switched through the second three-way valve 10, they are uniformly introduced into the heat exchanger 7 for external heating.

[0031] 3. Heating circuit return pipeline:

[0032] The hot-side outlet of the heating heat exchanger 7 is connected to the inlet of the third three-way valve 11. The third three-way valve 11 has two outlet branches. The first branch is connected back to the cold-side inlet of the low-temperature heat source heat exchanger 8, forming an intermediate working fluid loop on the heating side. The second branch is connected to the cold-side inlet of the molten salt extraction heating heat exchanger 15, forming a circulation loop for intermittent molten salt extraction heating.

[0033] 4. Energy storage side return pipeline:

[0034] The fourth three-way valve 12 has two inlets. The first inlet comes from the hot side outlet of the steam generator 6, and the second inlet comes from the hot side outlet of the molten salt heating heat exchanger 15. After the outlet of the fourth three-way valve 12 merges, it returns to the energy storage system 2, completing the closed-loop circulation of the medium in the energy storage system 2.

[0035] Preferably, the medium of the energy storage system 2 is a fluid working medium with high stability and high specific heat capacity, such as high-temperature heat transfer oil, molten salt, phase change material, or other liquid metals (such as sodium-potassium alloy).

[0036] Preferably, the circulating working fluid in the cooling working fluid loop of the divertor 5 is a fluid such as water, supercritical carbon dioxide, or an organic working fluid.

[0037] Based on the above system, the present invention also provides a method for cogeneration of heat and power in a fusion reactor. During the pulse operation period of the fusion reactor, the heat generated by the divertor 5 is directly exported for external heating, while the heat generated by the blanket 1 is dedicated to driving power generation, thus decoupling power generation and heating. During the intermittent period of the fusion reactor pulse operation, the heat stored in the cooling working fluid circuit where the blanket 1 is located is extracted and distributed proportionally to maintain continuous power generation and continue external heating. When switching from the fusion reactor pulse operation period to the intermittent period, the cooling working fluid circuits of the blanket and divertor 5 are isolated (i.e., the isolation valve 13 is closed and the circulating working fluid pump 14 is stopped), and the flow path is switched synchronously. The heat released by the energy storage system 2, which shares the cooling working fluid circuit with the blanket, is proportionally distributed. The main stream of the distributed heat is introduced into the power generation module 3 to maintain continuous power generation, and the bypass stream is introduced into the heating module 4 to maintain external heating.

[0038] Specifically, the fusion reactor cogeneration method of the present invention has two operating modes, which are achieved through the coordinated switching of the aforementioned isolation valve 13 and the first three-way valve 9, the second three-way valve 10, the third three-way valve 11 and the fourth three-way valve 12:

[0039] a. Fusion reactor pulse operation mode:

[0040] At this point, the fusion reactor is outputting normal thermal power. Isolation valve 13 is opened, and all relevant working fluid pumps are started.

[0041] The first three-way valve 9 achieves heat exchange by connecting to the steam generator 6, so that heat is only input to the branch of the power generation module 3; the second three-way valve 10 connects only to the branch of the low-temperature heat source heat exchanger 8; the third three-way valve 11 connects only to the branch returning to the low-temperature heat source heat exchanger 8; and the fourth three-way valve 12 connects only to the hot-side return branch of the steam generator 6.

[0042] The high-temperature heat generated by the cladding 1 is transferred to the steam generator 6 via the energy storage system 2 to drive the power generation module 3 to generate electricity at full power. Simultaneously, the heat generated by the divertor 5 forms an independent small loop through the low-temperature heat source heat exchanger 8, the second three-way valve 10, the heating heat exchanger 7, and the third three-way valve 11, dedicated to providing external heat load for the heating module 4. In this mode, the heat from the divertor 5 is fully utilized, and the heating loop does not draw any high-temperature heat energy from the cladding 1 used for power generation, achieving truly lossless combined heat and power (CHP).

[0043] b. Fusion reactor pulse-intermittent mode:

[0044] At this time, the fusion reactor is in a low-power pulse intermittent period. Close isolation valve 13 and stop circulating working fluid pump 14.

[0045] The first three-way valve 9 connects the hot-side inlet of the steam generator 6 and the hot-side inlet of the molten salt heat exchanger 15 simultaneously; the second three-way valve 10 switches to receive the incoming flow from the molten salt heat exchanger 15 and directs it to the heat exchanger 7; the third three-way valve 11 switches to direct the return flow from the heat exchanger 7 to the cold-side inlet of the molten salt heat exchanger 15; the fourth three-way valve 12 simultaneously receives the return flow from the steam generator 6 and the molten salt heat exchanger 15 and directs it back to the energy storage system 2.

[0046] The cooling working fluid loops of the cladding and divertor are isolated. Heat is provided by energy storage system 2. The heat energy working fluid from energy storage system 2 is divided into two streams at the first three-way valve 9. The main stream enters the power generation module 3 to maintain continuous power generation; the bypass stream, after heat exchange via the second three-way valve 10 and the heating heat exchanger 7, enters the heating module 4 to replace the shut-down divertor 5 and maintain external heating. The medium after work / heat exchange in the two streams finally merges and returns to energy storage system 2 via the fourth three-way valve 12. In this mode, by rationally distributing the heat released by energy storage system 2, the dual continuity and stability of grid output and heating are ensured throughout the entire intermittent period.

[0047] The power generation module 3 and steam generator 6 in this invention are primarily designed for conventional water / steam Rankine cycles. If the cladding 1 heat source temperature and the energy storage medium temperature are matched, the power generation module 3 can also be replaced with a supercritical carbon dioxide Brayton cycle system or a helium closed Brayton cycle system. In this case, the steam generator 6 can be equivalently replaced with a gas-liquid or gas-gas main heat exchanger.

[0048] Example:

[0049] Assume that the thermal power stored in the envelope 1 by the energy storage system 2 is 800MW, and the direct heating power supplied by the divertor 5 is 200MW. During operation, the envelope 1 is dedicated to driving the power generation module 3 via the energy storage system 2, while the divertor 5 directly supplies heat to the outside, completely separating the combined heat and power (CHP). During the fusion reactor pulse interval, the cooling working fluid loop of the divertor 5 is isolated, and the thermal power of the energy storage system 2 must simultaneously bear both power generation and heating loads. At this time, 200MW of the 800MW thermal power stored in the energy storage system 2 needs to be allocated as heating power and introduced into the heating branch. In this embodiment, the proportion of heating power to the thermal power stored in the energy storage system is: 200MW / 800MW=25%. Under the condition that the circulating working fluid flow rate and heat exchange are linearly correlated, the bypass opening of the first three-way valve 9 is set to 25%, and the 200MW heating power is introduced into the heating heat exchanger 7 via the second three-way valve 10 to replace the divertor 5 to maintain continuous external heating output. If the power plant's heating demand changes, the diversion percentage can be recalculated based on the new heating power ratio, and the bypass opening of the first three-way valve 9 can be adjusted. No hardware configuration needs to be changed, and the system can flexibly adapt to different thermal and electrical load demands.

[0050] In summary, this invention utilizes the heat source characteristics of fusion reactors, dedicating the blanket to a dedicated energy storage system for driving the power generation module, while the divertor is directly connected to the heating module, with the two loops completely isolated physically and thermodynamically. During operation, the divertor's heat is directly supplied externally in its entirety, without passing through the turbine's internal flow channels, thus consuming no high-temperature steam used for power generation. This completely eliminates the energy competition between heat and power caused by the reduction in power generation due to steam extraction for heating in traditional cogeneration systems. Furthermore, addressing the dual constraints of radioactive working fluid safety isolation and rapid pulse-intermittent switching in fusion reactors, this invention designs a core fluid distribution network consisting of a set of valves. This core fluid distribution network flexibly connects the steam generator, power generation module, molten salt heat exchanger, low-temperature heat source heat exchanger, and heating heat exchanger in series and parallel, achieving seamless switching between the fusion reactor pulse operation mode (direct heating from the divertor) and the fusion reactor pulse intermittent mode (heat supply from the energy storage system) solely through the coordinated action of the valve group. Closing the isolation valve during the pulse interval of the fusion reactor can simultaneously achieve a physical hard cut-off of the cooling medium circuit of the divertor, avoiding thermal stress fatigue and material creep failure caused by overcooling of the circuit under heat source-free conditions, and meeting the unique safety isolation requirements of the fusion reactor.

[0051] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A fusion reactor cogeneration system, characterized in that, It includes a fusion reactor heat source subsystem and a cogeneration subsystem. The fusion reactor heat source subsystem contains independently operating blankets and divertors, used to absorb high-temperature heat and medium- and low-temperature heat from the fusion reactor, respectively. The cogeneration subsystem includes a power generation module, a heating module, and a fluid distribution network. The power generation module receives high-temperature heat to drive the main cycle for power generation, and the heating module receives medium- and low-temperature heat to output heat load. Through switching of the fluid distribution network, during the fusion reactor pulse operation period, the heat from the divertor is independently introduced into the heating module for heating. During the fusion reactor pulse interval, the heat from the energy storage system in the loop containing the blanket is extracted and introduced into the heating module to continue heating. During operation, the heat generated by the divertor is directly exported for external heating, while the heat generated by the blanket is dedicated to driving power generation, thus decoupling power generation and heating. During the fusion reactor pulse interval, the heat stored in the loop containing the blanket is extracted and proportionally divided to maintain continuous power generation and continue external heating. When switching from the fusion reactor pulse operation period to the fusion reactor pulse interval, the loop containing the divertor is isolated, and the flow path is switched synchronously to proportionally divide the heat released by the energy storage system shared by the loop containing the blanket. The main flow after diversion is introduced into the power generation module to maintain continuous power generation, and the bypass flow after diversion is introduced into the heating module to maintain external heating. The outlet of the cladding is connected to the energy storage system; the outlet of the divertor is connected to the hot-side inlet of the low-temperature heat source heat exchanger via a circulating working fluid pump; the hot-side outlet of the low-temperature heat source heat exchanger is connected to the inlet of the divertor via an isolation valve. The cogeneration subsystem also includes a steam generator, a heating heat exchanger in the heating module, a low-temperature heat source heat exchanger, a molten salt heating heat exchanger, and a first three-way valve, a second three-way valve, a third three-way valve, and a fourth three-way valve, which are the core valve groups for switching operating conditions; the fluid distribution network includes the energy storage side diversion pipeline, the heating heat source selection pipeline, the heating circuit return pipeline, and the energy storage side return pipeline.

2. The fusion reactor cogeneration system according to claim 1, characterized in that, The cladding and divertor operate in different temperature ranges.

3. The fusion reactor cogeneration system according to claim 1, characterized in that, In the energy storage side branch pipeline, the outlet of the energy storage system is connected to the inlet of the first three-way valve; the first outlet branch of the first three-way valve is connected to the hot side inlet of the steam generator, and the second outlet branch of the first three-way valve is connected to the hot side inlet of the molten salt heat exchanger; in the heat source selection pipeline, the first inlet of the second three-way valve is connected to the cold side outlet of the molten salt heat exchanger, and the second inlet of the second three-way valve is connected to the cold side outlet of the low-temperature heat source heat exchanger; the outlet of the second three-way valve is connected to the hot side inlet of the heat exchanger; in the heat return pipeline, the hot side outlet of the heat exchanger is connected to the inlet of the third three-way valve.

4. A fusion reactor cogeneration system according to claim 3, characterized in that, The first outlet branch of the third three-way valve is connected back to the cold side inlet of the low-temperature heat source heat exchanger.

5. A fusion reactor cogeneration system according to claim 4, characterized in that, In the energy storage side return pipeline, the first inlet of the fourth three-way valve is connected to the hot side outlet of the steam generator, and the second inlet of the fourth three-way valve is connected to the hot side outlet of the molten salt heating heat exchanger.

6. A fusion reactor cogeneration system according to claim 5, characterized in that, The outlet of the fourth three-way valve returns to the energy storage system after merging.

7. A fusion reactor cogeneration system according to claim 1, characterized in that, The second outlet branch of the third three-way valve is connected to the cold side inlet of the molten salt heating heat exchanger.

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