A split-flow heat storage type rotor engine-ammonia water combined power system and method

Abstract

The application provides a split heat storage type rotor engine-ammonia water combined power system and method, which comprises an X-type rotor engine using hydrogen-doped fuel and a steam circulation system using an ammonia water mixture as a circulating working medium. The steam circulation system comprises a superheater, an evaporator, a separator and an output motor. The high-temperature exhaust gas outlet of the X-type rotor engine is in communication with the heat source inlet of the superheater. The heat source outlet of the superheater is in communication with the heat source inlet of the evaporator. The heat source outlet of the evaporator is in communication with the atmosphere. The working medium outlet of the working medium pump is in communication with the working medium inlet of the evaporator. The working medium outlet of the evaporator is in communication with the working medium inlet of the separator. The ammonia-rich steam outlet of the separator is in communication with the working medium inlet of the superheater. The working medium outlet of the superheater is in communication with the working medium inlet of the turbine generator for power generation. The turbine generator is connected with the output motor. The system can store the rotor engine exhaust waste heat and generate power by using the exhaust waste heat, thereby improving the thermal efficiency.

Description

Technical Field

[0001] This invention belongs to the field of internal combustion engine power technology, specifically to a split-flow heat storage rotor engine-ammonia-water combined power system and method. Background Technology

[0002] The basic capabilities and characteristics that a power unit for a small unmanned aerial vehicle (UAV) should possess include: rapid high-altitude start-up capability, low-fuel-consumption operation and power extraction capability for long endurance, efficient propulsion capability, and operational safety and reliability. For the selection of power units for small UAVs, various power systems can be used, such as electric motors, piston engines, turbojet engines, and rotary engines. Among these, rotary engines have outstanding advantages such as fewer components, compact structure, low vibration and noise, and high power-to-weight ratio, making them superior performance among power units for small, low-cost UAVs.

[0003] However, rotary engines primarily burn conventional fuels. Furthermore, the unique high-altitude, low-pressure environment of aircraft rotary engines, coupled with their elongated combustion chambers leading to incomplete combustion, results in problems such as high fuel consumption, severe emissions, sealing difficulties, and low thermodynamic efficiency. This even led to their near disappearance from the history of internal combustion engines. Therefore, improving rotary engines to achieve higher exhaust gas utilization and thermal efficiency is crucial. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides a split-flow thermal storage rotary engine-ammonia-water combined power system and method. It utilizes a steam circulation system to store the exhaust waste heat of the rotary engine and uses the exhaust waste heat to generate electricity. This not only enables the rotary engine to have a higher exhaust utilization rate but also improves the thermal efficiency of the rotary engine, overcoming the aforementioned problems of high fuel consumption, serious pollution emissions, sealing difficulties, and low thermodynamic efficiency of the rotary engine.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a split-flow thermal storage rotor engine-ammonia-water combined power system, comprising an X-type rotor engine using hydrogen-blended fuel and a steam circulation system using an ammonia-water mixture as the circulating working fluid, wherein the high-temperature exhaust outlet of the X-type rotor engine is connected to the inlet of the steam circulation system for generating electricity using the high-temperature exhaust of the X-type rotor engine.

[0006] The steam cycle system includes a superheater, an evaporator, a separator, and an output motor. The high-temperature exhaust port of the X-type rotor engine is connected to the heat source inlet of the superheater, the heat source outlet of the superheater is connected to the heat source inlet of the evaporator, and the heat source outlet of the evaporator is connected to the atmosphere. The working fluid outlet of the working fluid pump is connected to the working fluid inlet of the evaporator, the working fluid outlet of the evaporator is connected to the working fluid inlet of the separator, the ammonia-rich steam outlet of the separator is connected to the working fluid inlet of the superheater, and the working fluid outlet of the superheater is connected to the working fluid inlet of the turbine generator for power generation. The turbine generator is connected to the output motor.

[0007] Furthermore, the X-type rotary engine has an inverted triangular structure, adopts a U-shaped rotor profile, uses the outer helical line as the rotor profile, and the outer envelope line as the cylinder block profile.

[0008] Furthermore, the lean ammonia vapor outlet of the separator is connected to the inlet of the throttle valve, the outlet of the throttle valve is connected to the inlet of the condenser, and the outlet of the condenser is connected to the inlet of the working fluid pump.

[0009] Furthermore, it also includes a regenerator, with the working fluid outlet of the working fluid pump connected to the working fluid inlet of the regenerator, and the working fluid outlet of the regenerator connected to the working fluid inlet of the evaporator; the working fluid outlet of the turbine generator connected to the heat source inlet of the regenerator, the heat source outlet of the regenerator connected to the inlet of the condenser, and the outlet of the condenser connected to the inlet of the working fluid pump.

[0010] Furthermore, it also includes a diversion valve, a primary heat storage reheater, and a secondary heat storage reheater. The high-temperature exhaust port of the X-type rotary engine is connected to the inlet of the diversion valve. The first outlet of the diversion valve is connected to the heat source inlet of the primary heat storage reheater. The heat source outlet of the primary heat storage reheater is connected to the heat source inlet of the secondary heat storage reheater. The heat source outlet of the secondary heat storage reheater is connected to the heat source inlet of the superheater. The heat source outlet of the superheater is connected to the heat source inlet of the evaporator. The heat source outlet of the evaporator is connected to the atmosphere. The second outlet of the diversion valve is connected to the heat source inlet of the superheater.

[0011] Furthermore, the turbine generator includes a high-pressure stage turbine, a medium-pressure stage turbine, and a low-pressure stage turbine. The working fluid outlet of the superheater is connected to the working fluid inlet of the high-pressure stage turbine. The working fluid outlet of the high-pressure stage turbine is connected to the working fluid inlet of the medium-pressure stage turbine through a first switching valve. The working fluid outlet of the medium-pressure stage turbine is connected to the working fluid inlet of the low-pressure stage turbine through a second switching valve. The working fluid outlet of the low-pressure stage turbine is connected to the heat source inlet of the regenerator. The heat source outlet of the regenerator is connected to the inlet of the condenser.

[0012] Furthermore, under low power load conditions, switch valve one and switch valve two are open; under high power load conditions, switch valve one and switch valve two are closed.

[0013] Furthermore, the turbine generator includes a high-pressure stage turbine, a medium-pressure stage turbine, and a low-pressure stage turbine. The working fluid outlet of the superheater is connected to the working fluid inlet of the high-pressure stage turbine. The outlet of the high-pressure stage turbine is connected to the working fluid inlet of the first-stage thermal storage reheater through a third switching valve. The working fluid outlet of the first-stage thermal storage reheater is connected to the working fluid inlet of the medium-pressure stage turbine. The working fluid outlet of the medium-pressure stage turbine is connected to the working fluid inlet of the second-stage thermal storage reheater through a fourth switching valve. The working fluid outlet of the second-stage thermal storage reheater is connected to the working fluid inlet of the low-pressure stage turbine. The working fluid outlet of the low-pressure stage turbine is connected to the heat source inlet of the regenerator. The heat source outlet of the regenerator is connected to the inlet of the condenser.

[0014] Furthermore, under low power load conditions, switch valves three and four are closed; under high power load conditions, switch valves one and two are open.

[0015] The present invention also provides an operation method for a split-flow thermal storage rotary engine-ammonia-water combined power system, the specific steps of which are as follows:

[0016] S1 uses a mixture of hydrogen and air as a combustion-supporting gas, which is introduced into the X-type rotary engine. The high-temperature exhaust gas generated by the complete combustion of fuel and combustion-supporting gas in the X-type rotary engine.

[0017] S2 introduces high-temperature exhaust gas into the heat source side of the superheater and evaporator of the steam circulation system. In the steam circulation system, the working fluid pump introduces an ammonia-water mixture into the working fluid side of the evaporator to absorb the heat from the high-temperature exhaust gas and obtain ammonia-water steam. The ammonia-water steam is then introduced into the separator to obtain ammonia-rich steam. The ammonia-rich steam is then introduced into the working fluid side of the superheater to absorb the heat from the high-temperature exhaust gas and then introduced into the turbine generator to generate electricity.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] This invention provides a split-flow thermal storage rotary engine-ammonia-water combined power system, using an X-type rotary engine with hydrogen-blended fuel. Hydrogen blending effectively advances the engine's combustion process, reduces the combustion duration angle, and promotes complete fuel combustion. This not only provides higher-temperature exhaust gas but also improves the engine's combustion and emission performance. Furthermore, this invention uses the high-temperature exhaust gas from the X-type rotary engine as a heat source in a steam cycle system, utilizing the heat from the high-temperature exhaust gas to heat the circulating working fluid, thus achieving waste heat power generation. Moreover, in conventional steam cycles, the evaporation process is the root cause of low efficiency in steam cycle systems, and water... The evaporation section, i.e., the phase change gasification section, requires the absorption of a large amount of latent heat of vaporization. The phase change process of water has isothermal characteristics, while the release of waste heat from the high-temperature exhaust of the X-type rotary engine is a variable-temperature process. It is difficult to achieve a good match between the two, resulting in a large energy loss in this process and hindering further improvement of the steam cycle efficiency. In order to solve the above problems, this invention uses an ammonia-water mixture as the circulating working fluid. The ammonia-water mixture has variable-temperature phase change characteristics, which has a better match with the temperature change of the high-temperature exhaust of the X-type rotary engine. It can reduce the irreversibility of the heat absorption process of the working fluid, lower the heat source temperature, improve the heat source utilization rate, and effectively improve the thermal mismatch problem in the heating process.

[0020] In summary, this invention enables the effective utilization of the heat from the exhaust gas containing a large amount of high temperature, which was originally only emitted to the outside world by the X-type rotary engine, to serve as a heat source for a steam cycle system using an ammonia-water mixture as the circulating working fluid. This reduces the exhaust heat emitted into the atmosphere, lowers the greenhouse effect, and achieves a higher thermal energy utilization rate. Attached Figure Description

[0021] Figure 1 This is a structural comparison diagram of a triangular rotor engine and an X-type rotor engine.

[0022] Figure 2 This is a schematic diagram comparing the detailed structures of a triangular rotor engine and an X-type rotor engine;

[0023] Figure 3 This is a schematic diagram of the charging stage of the present invention;

[0024] Figure 4 This is a schematic diagram of the discharge stage of the present invention.

[0025] In the attached diagram: 1-X-type rotary engine, 2-mixing valve, 3-first-stage heat storage reheater, 4-second-stage heat storage reheater, 5-second diversion valve, 6-superheater, 7-evaporator, 8-separator, 9-throttle valve, 10-condenser, 11-working fluid pump, 12-regenerator, 13-output motor, 14-high-pressure stage turbine, 15-medium-pressure stage turbine, 16-low-pressure stage turbine, 17-switch valve one, 18-switch valve two, 19-switch valve three, 20-switch valve four. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] The present invention is a split-flow thermal storage rotor engine-ammonia-water combined power system, including an X-type rotor engine 1 and a steam circulation system. The high-temperature exhaust port of the X-type rotor engine 1 is connected to the air inlet of the steam circulation system for generating electricity using the high-temperature exhaust of the X-type rotor engine 1. The fuel of the X-type rotor engine 1 is hydrogen-blended fuel, and the circulating working fluid of the steam circulation system is an ammonia-water mixture.

[0028] like Figure 1 , 2 As shown, the X-type rotary engine 1 has an inverted triangular structure, employing an "8"-shaped rotor profile. The outer helical axis serves as the rotor profile, and the outer envelope serves as the cylinder block profile. This structure features a higher theoretical compression ratio, higher thermal efficiency in the High Efficiency Hybrid Cycle (HEHC) cycle, higher thermal efficiency, and a higher power-to-weight ratio. It perfectly solves the problems of high fuel consumption, easy wear, and easy leakage inherent in triangular rotary engines.

[0029] The X-type rotary engine 1 mainly consists of an elliptical rotor, a triangular cylinder block, front and rear end covers, an exhaust port, and an intake port. The rotor revolves around the crankshaft while simultaneously rotating in the opposite direction; each 720° crankshaft rotation constitutes one power cycle. During combustion, the engine combustion chamber consists of two parts: a fixed hemispherical region and a slit region that changes with rotor rotation. The spark plug is located at the top of the combustion chamber. The chamber volume reaches its minimum at top dead center (360° crankshaft rotation). The X-type rotary engine 1 operates similarly to a two-stroke reciprocating engine; the rotor handles both intake and exhaust. The combustion chamber recess is located outside the rotor, and the spark plug is placed inside the recess. The combustible mixture enters the rotor cavity through the intake port and then flows into the cylinder block. The burned exhaust gas enters the rotor cavity through the rotor's circumferential exhaust ports, mixes with the cooling gas, and is discharged from the engine through the three exhaust ports on the front end cover.

[0030] The first inlet of the mixing valve 2 is used to introduce air, the first inlet of the mixing valve 2 is used to introduce hydrogen, and the outlet of the mixing valve 2 is connected to the air inlet of the X-type rotary engine 1 to deliver hydrogen-blended fuel into the combustion chamber of the X-type rotary engine 1.

[0031] The steam circulation system includes a superheater 6, an evaporator 7, a separator 8, a throttle valve 9, a condenser 10, a working fluid pump 11, a regenerator 12, and an output motor 13. The high-temperature exhaust port of the X-type rotor engine 1 is connected to the heat source inlet of the superheater 6, the heat source outlet of the superheater 6 is connected to the heat source inlet of the evaporator 7, and the heat source outlet of the evaporator 7 is connected to the atmosphere. The working fluid outlet of the working fluid pump 11 is connected to the working fluid inlet of the regenerator 12, and the working fluid outlet of the regenerator 12 is connected to the working fluid inlet of the evaporator 7 to heat the ammonia-water mixture to obtain ammonia-water vapor. The working fluid outlet of the evaporator 7 is connected to the working fluid inlet of the separator 8 to separate the ammonia-water vapor into ammonia-rich vapor and ammonia-lean vapor. Steam: The ammonia-rich steam outlet of separator 8 is connected to the working fluid inlet of superheater 6. The working fluid outlet of superheater 6 is connected to the working fluid inlet of turbine generator for power generation. Turbine generator is connected to output motor 13. The lean ammonia steam outlet of separator 8 is connected to the inlet of throttle valve 9. The outlet of throttle valve 9 is connected to the inlet of condenser 10. The working fluid outlet of turbine generator is connected to the heat source inlet of regenerator 12. The heat source outlet of regenerator 12 is connected to the inlet of condenser 10. After the ammonia steam generates electricity by the turbine generator, the remaining waste heat ammonia-rich steam is used to heat regenerator 12 and then combines with lean ammonia steam and flows back to working fluid pump 11 through condenser 10, completing one cycle.

[0032] Preferably, it also includes a diversion valve 5, a primary heat storage reheater 3, and a secondary heat storage reheater 4. The high-temperature exhaust port of the X-type rotary engine 1 is connected to the inlet of the diversion valve 5. The first outlet of the diversion valve 5 is connected to the heat source inlet of the primary heat storage reheater 3. The heat source outlet of the primary heat storage reheater 3 is connected to the heat source inlet of the secondary heat storage reheater 4. The heat source outlet of the secondary heat storage reheater 4 is connected to the heat source inlet of the superheater 6. The heat source outlet of the superheater 6 is connected to the heat source inlet of the evaporator 7. The heat source outlet of the evaporator 7 is connected to the atmosphere. The second outlet of the diversion valve 5 is connected to the heat source inlet of the superheater 6.

[0033] Preferably, the turbine generator includes a high-pressure stage turbine 14, a medium-pressure stage turbine 15, and a low-pressure stage turbine 16. The working fluid outlet of the superheater 6 is connected to the working fluid inlet of the high-pressure stage turbine 14. The working fluid outlet of the high-pressure stage turbine 14 is connected to the working fluid inlet of the medium-pressure stage turbine 15 via a first-stage valve 17. The outlet of the high-pressure stage turbine 14 is connected to the working fluid inlet of the first-stage heat storage reheater 3 via a third-stage valve 19. The working fluid outlet of the first-stage heat storage reheater 3 is connected to the working fluid inlet of the medium-pressure stage turbine 15. The working fluid inlet is connected, and the working fluid outlet of the medium-pressure turbine 15 is connected to the working fluid inlet of the low-pressure turbine 16 through the second switch valve 18. The working fluid outlet of the medium-pressure turbine 15 is connected to the working fluid inlet of the secondary heat storage reheater 4 through the fourth switch valve 20. The working fluid outlet of the secondary heat storage reheater 4 is connected to the working fluid inlet of the low-pressure turbine 16. The working fluid outlet of the low-pressure turbine 16 is connected to the inlet of the regenerator 12, and the outlet of the regenerator 12 is connected to the inlet of the condenser 10.

[0034] In this invention, the high-temperature exhaust gas from the X-type rotor engine 1 is first diverted by the diversion valve 5. A portion passes through the primary heat storage reheater 3 and the secondary heat storage reheater 4, then through the superheater 6 and the evaporator 7 before being discharged into the atmosphere. The other portion bypasses the primary and secondary heat storage reheaters, passing directly through the superheater 6 and the evaporator 7 before being discharged. The high-temperature exhaust gas from the X-type rotor engine 1 provides a high-temperature heat source for the primary heat storage reheater 3, the secondary heat storage reheater 4, the superheater 6, and the evaporator 7. The ammonia-water mixture in the working fluid pump 11 is heated by the regenerator 12 and the evaporator 7, and then separated into high-concentration ammonia-water vapor (rich ammonia vapor) and low-concentration ammonia-water vapor (lean ammonia vapor) by the separator 8. The rich ammonia vapor passes through the superheater 7 and then through the high-pressure turbine 14, the medium-pressure turbine 15, and the low-pressure turbine 16 to generate electricity. The remaining waste heat, rich in ammonia vapor, is used to heat the regenerator 12 and combines with low-concentration ammonia water vapor (lean ammonia vapor) before flowing back to the working fluid pump 11 through the condenser 10, thus completing one cycle.

[0035] When using the system of this invention, the main steps include: engine operation stage, exhaust stage, heat storage stage, and power generation stage, as detailed below:

[0036] 1) Engine working stage: The X-type rotary engine 1 uses hydrogen and air as combustion aids. After passing through the mixing valve 2 to become a premixed gas, it enters the combustion chamber of the X-type rotary engine 1 to participate in combustion.

[0037] Hydrogen is a green fuel and, compared to common hydrocarbon fuels, possesses superior physicochemical parameters such as a wider flammability limit, faster diffusion rate, higher adiabatic flame temperature, and lower ignition energy. The incorporation of hydrogen effectively reduces engine carbon emissions and significantly increases the braking mean effective pressure and cylinder temperature of the X-type rotary engine, while also significantly reducing the flame development and propagation cycle. Consequently, it also produces exhaust gases with higher temperatures.

[0038] Exhaust stage: The high-temperature exhaust generated after the fuel and mixed combustion aid are fully combusted in the X-type rotary engine 1 is connected to the diversion valve 5 through the exhaust pipe.

[0039] Heat storage stage: The high-temperature exhaust gas discharged from the X-type rotary engine 1 is divided into two parts by the diversion valve 5. One part first passes through the first-stage heat storage reheater 3 and the second-stage heat storage reheater 4, serving as the heating medium for the first-stage heat storage reheater 3 and the second-stage heat storage reheater 4, providing high-temperature heat energy for the two heat storage reheaters. Then the high-temperature exhaust gas enters the superheater 6 and the evaporator 7 and is discharged into the atmosphere.

[0040] Since the high-temperature exhaust gas from the first-stage heat storage reheater 3 and the second-stage heat storage reheater 4 is used as a high-temperature working fluid for heat transfer in the heat storage reheater, the temperature entering the superheater 6 and reheater 7 will be reduced to a certain extent. Therefore, another part of the high-temperature exhaust gas separated by the diversion valve 5 needs to pass directly through the superheater 6 and evaporator 7, and together with the exhaust gas after passing through the first-stage heat storage reheater 3 and the second-stage heat storage reheater 4, it is used as a high-temperature working fluid for the superheater 6 and evaporator 7 before being discharged into the atmosphere, providing high-temperature heat for the superheater 6 and evaporator 7.

[0041] Power generation phase: The power generation phase can be mainly divided into two operating conditions: low power load condition and high power load condition.

[0042] like Figure 3 As shown, under low-power load conditions, the external machinery operates at a low load and does not require much power supply. At this time, the ammonia-water mixture working fluid pump 11 delivers ammonia-water through the regenerator 12 to the evaporator 7. The high-temperature exhaust gas from the engine in the evaporator 7 heats the low-temperature ammonia-water mixture, turning it into a high-temperature ammonia-water vapor mixture. This mixture then enters the separator 8, which separates the high-temperature mixture into ammonia-rich vapor and ammonia-lean vapor. The ammonia-rich vapor enters the superheater 6, where it is further heated to the superheat temperature by the high-temperature exhaust gas from the engine. Simultaneously, switch valves 1-17 and 1-18 open, while switch valves 19-10 and 20 close. After the ammonia-rich vapor performs work in the high-pressure turbine 14, it is connected from the tail end of the turbine to the medium-pressure turbine 15. After performing work in the medium-pressure turbine 15, it is connected from the tail end to the low-pressure turbine 16. Finally, the ammonia-rich vapor discharged after performing work enters the regenerator 12 as the working fluid of the regenerator. After being cooled by the condenser 10 with cooling water as the working fluid, it becomes an ammonia-water mixture and returns to the working fluid pump 11. Meanwhile, the lean ammonia vapor separated by the separator 8 passes through the throttling valve 9 and is directly cooled by the condenser 10 before returning to the working fluid pump 11.

[0043] like Figure 4As shown, under high power load conditions, the external machinery operates under high load and requires more electricity. At this time, the turbine needs to do more work on the external motor. This means that the ammonia-rich steam that needs to pass through the turbine needs to carry more heat. Therefore, when the ammonia-rich steam is separated by the separator 8, the switch valves 17 and 18 are closed, and the switch valves 19 and 20 are opened. After the ammonia-rich steam does work through the high-pressure turbine 14, it enters the first-stage heat storage reheater 3 from the end of the high-pressure turbine 14. In the first-stage heat storage reheater 3, the high-temperature exhaust gas discharged by the X-type rotor engine 1 transfers heat to the ammonia-rich steam. The heated ammonia-rich steam enters the medium-pressure turbine 15 to do work. The ammonia-rich steam discharged from the end of the medium-pressure turbine 15 enters the second-stage heat storage reheater 4. After the high-temperature exhaust gas discharged by the engine in the second-stage heat storage reheater 4 transfers heat, the high-temperature steam enters the low-pressure turbine 16 to do work. The ammonia-rich steam that has done work enters the regenerator 12 as a working fluid and is cooled by the condenser 10 before returning to the working fluid pump 1. The lean ammonia steam separated by the separator 8 is throttled by the throttle valve 9 and directly cooled by the condenser 10 before returning to the working fluid pump.

[0044] The high-voltage turbine 14, the medium-voltage turbine 15, and the low-voltage turbine 16 are all connected to the external output motor 13. As the turbines do work, they drive the output motor 13 to generate electricity, thereby providing power to external machinery.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still make modifications or equivalent substitutions to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention are within the protection scope of the claims of the present invention pending approval.

Claims

1. A combined power system of a split-flow heat storage type rotor engine-ammonia water, characterized by, The system includes an X-type rotary engine (1) using hydrogen-blended fuel and a steam circulation system using an ammonia-water mixture as the circulating working fluid. The steam circulation system includes a superheater (6), an evaporator (7), a separator (8), and an output motor (13). The high-temperature exhaust outlet of the X-type rotary engine (1) is connected to the heat source inlet of the superheater (6), the heat source outlet of the superheater (6) is connected to the heat source inlet of the evaporator (7), and the heat source outlet of the evaporator (7) is connected to the atmosphere. The working fluid outlet of the working fluid pump (11) is connected to the working fluid inlet of the evaporator (7), the working fluid outlet of the evaporator (7) is connected to the working fluid inlet of the separator (8), the ammonia-rich steam outlet of the separator (8) is connected to the working fluid inlet of the superheater (6), the working fluid outlet of the superheater (6) is connected to the working fluid inlet of the turbine generator for power generation, and the turbine generator is connected to the output motor (13). The X-type rotary engine (1) has an inverted triangular structure and adopts an "8" shaped rotor profile, with the outer wheel line as the rotor profile and the outer envelope line as the cylinder block profile. It also includes a diversion valve (5), a primary heat storage reheater (3), and a secondary heat storage reheater (4). The high-temperature exhaust port of the X-type rotor engine (1) is connected to the inlet of the diversion valve (5). The first outlet of the diversion valve (5) is connected to the heat source inlet of the primary heat storage reheater (3). The heat source outlet of the primary heat storage reheater (3) is connected to the heat source inlet of the secondary heat storage reheater (4). The heat source outlet of the secondary heat storage reheater (4) is connected to the heat source inlet of the superheater (6). The heat source outlet of the superheater (6) is connected to the heat source inlet of the evaporator (7). The heat source outlet of the evaporator (7) is connected to the atmosphere. The second outlet of the diversion valve (5) is connected to the heat source inlet of the superheater (6).

2. The combined power system of the split-flow heat-accumulation type rotor engine-ammonia water according to claim 1, characterized in that, The ammonia vapor outlet of the separator (8) is connected to the inlet of the throttle valve (9), the outlet of the throttle valve (9) is connected to the inlet of the condenser (10), and the outlet of the condenser (10) is connected to the inlet of the working fluid pump (11).

3. The combined power system of the split-flow heat-accumulation type rotor engine-ammonia water according to claim 1, characterized in that, It also includes a regenerator (12), the working fluid outlet of the working fluid pump (11) is connected to the working fluid inlet of the regenerator (12), the working fluid outlet of the regenerator (12) is connected to the working fluid inlet of the evaporator (7); the working fluid outlet of the turbine generator is connected to the heat source inlet of the regenerator (12), the heat source outlet of the regenerator (12) is connected to the inlet of the condenser (10), and the outlet of the condenser (10) is connected to the inlet of the working fluid pump (11).

4. The combined power system of the split-flow heat-accumulation type rotor engine-ammonia water according to claim 1, characterized in that, The turbine generator includes a high-pressure turbine (14), a medium-pressure turbine (15), and a low-pressure turbine (16). The working fluid outlet of the superheater (6) is connected to the working fluid inlet of the high-pressure turbine (14). The working fluid outlet of the high-pressure turbine (14) is connected to the working fluid inlet of the medium-pressure turbine (15) through a first switching valve (17). The working fluid outlet of the medium-pressure turbine (15) is connected to the working fluid inlet of the low-pressure turbine (16) through a second switching valve (18). The working fluid outlet of the low-pressure turbine (16) is connected to the heat source inlet of the regenerator (12). The heat source outlet of the regenerator (12) is connected to the inlet of the condenser (10).

5. The combined power system of the split-flow heat-accumulation type rotor engine-ammonia water according to claim 4, characterized in that, When operating under low power load conditions, valve one (17) and valve two (18) are open; when operating under high power load conditions, valve one (17) and valve two (18) are closed.

6. The split-flow thermal storage rotor engine-ammonia-water combined power system according to claim 1, characterized in that, The turbine generator includes a high-pressure turbine (14), a medium-pressure turbine (15), and a low-pressure turbine (16). The working fluid outlet of the superheater (6) is connected to the working fluid inlet of the high-pressure turbine (14). The outlet of the high-pressure turbine (14) is connected to the working fluid inlet of the first-stage heat storage reheater (3) through the third switch valve (19). The working fluid outlet of the first-stage heat storage reheater (3) is connected to the working fluid inlet of the medium-pressure turbine (15). The working fluid outlet of the medium-pressure turbine (15) is connected to the working fluid inlet of the second-stage heat storage reheater (4) through the fourth switch valve (20). The working fluid outlet of the second-stage heat storage reheater (4) is connected to the working fluid inlet of the low-pressure turbine (16). The working fluid outlet of the low-pressure turbine (16) is connected to the heat source inlet of the regenerator (12). The heat source outlet of the regenerator (12) is connected to the inlet of the condenser (10).

7. The split-flow thermal storage rotary engine-ammonia-water combined power system according to claim 5, characterized in that, Under low power load conditions, switch valve three (19) and switch valve four (20) are closed; under high power load conditions, switch valve one (17) and switch valve two (18) are open.

8. The operating method of the split-flow thermal storage rotor engine-ammonia-water combined power system according to any one of claims 1-7, characterized in that, The specific steps are as follows: S1 uses a mixture of hydrogen and air as a combustion aid and introduces the combustion aid into the X-type rotary engine (1). The high-temperature exhaust generated by the complete combustion of fuel and combustion aid in the X-type rotary engine (1) is as follows: S2 introduces the high-temperature exhaust gas into the heat source side of the superheater (6) and evaporator (7) of the steam circulation system; in the steam circulation system, the working fluid pump (11) introduces the ammonia-water mixture into the working fluid side of the evaporator (7) to absorb the heat of the high-temperature exhaust gas and obtain ammonia-water steam. The ammonia-water steam is introduced into the separator (8) to obtain ammonia-rich steam. The ammonia-rich steam is introduced into the working fluid side of the superheater (6) to absorb the heat of the high-temperature exhaust gas and then introduced into the turbine generator to generate electricity.

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