A hydrogen-oxygen-water vapor thermoelectric cycle system and working method

Abstract

The present invention provides a hydrogen-oxygen-water vapor thermoelectric cycle system and a working method, which belongs to the field of clean energy power generation. The problem of external heat source and water vapor source is solved when the system is started. It includes a starting heat source subsystem and a water vapor generation cycle subsystem; the starting heat source subsystem includes a high-pressure compressor, a hydrogen-air combustion chamber, a hydrogen storage tank, a high-pressure turbine and a generator / starter one, and the high-pressure compressor, the high-pressure turbine and the generator / starter are arranged coaxially; the water vapor generation cycle subsystem includes a low-pressure compressor, a hydrogen-oxygen-water vapor combustion chamber, a hydrogen storage tank, an oxygen storage tank, a low-pressure turbine, a generator / starter two, a heat exchanger and a water reservoir, and the generator / starter two, the low-pressure turbine and the low-pressure compressor are arranged coaxially; the air inlet of the high-pressure compressor is connected to the outside world, and the air outlet of the high-pressure compressor is respectively connected to the air inlet of the hydrogen-air combustion chamber and one of the air inlets of the hydrogen-oxygen-water vapor combustion chamber. The present invention is suitable for stable power generation.

Description

Technical Field

[0001] The invention belongs to the field of clean energy power generation, and in particular relates to a hydrogen-oxygen-steam thermoelectric cycle system and a working method. Background Art

[0002] Hydrogen energy has zero carbon properties, and large-scale use of hydrogen energy can enable the energy system to achieve zero carbon emissions efficiently. At present, although the gas turbine combined cycle system that burns hydrogen can achieve zero carbon emissions, it is difficult to achieve zero nitrogen oxide emissions because it uses air as a working fluid, and it will continue to have an impact on the ecological environment.

[0003] Water is the only product of hydrogen-oxygen chemical reaction. Using water vapor as working fluid can realize power cycle. However, the water vapor generation process is slow and requires a certain heat source. For the thermal cycle system using water vapor as working fluid, an additional heat source or water vapor source is required at startup, which seriously affects the startup characteristics of the thermal cycle system.

[0004] Therefore, it is necessary to provide a new thermoelectric cycle system to solve the above problems. Summary of the invention

[0005] In view of this, the present invention aims to propose a hydrogen-oxygen-steam thermoelectric cycle system to solve the problem of requiring an external heat source and a steam source when the system is started.

[0006] To achieve the above object, the technical solution created by the present invention is implemented as follows:

[0007] A hydrogen-oxygen-steam thermoelectric cycle system, comprising a starting heat source subsystem and a steam generation cycle subsystem; the starting heat source subsystem comprises a high-pressure compressor, a hydrogen-air combustion chamber, a hydrogen storage tank, a high-pressure turbine and a generator / starter motor 1, and the high-pressure compressor, the high-pressure turbine and the generator / starter motor are arranged coaxially; the steam generation cycle subsystem comprises a low-pressure compressor, a hydrogen-oxygen-steam combustion chamber, a hydrogen storage tank, an oxygen storage tank, a low-pressure turbine, a generator / starter motor 2, a heat exchanger and a water reservoir, and the generator / starter motor 2, the low-pressure turbine and the low-pressure compressor are arranged coaxially;

[0008] The air inlet of the high-pressure compressor is connected to the outside, the air outlet of the high-pressure compressor is connected to the air inlet of the hydrogen-air combustion chamber and one of the air inlets of the hydrogen-oxygen-steam combustion chamber respectively, the outlet of the hydrogen-air combustion chamber and one of the outlets of the hydrogen-oxygen-steam combustion chamber are connected to the air inlet of the high-pressure turbine through pipelines respectively, and the other outlet of the hydrogen-oxygen-steam combustion chamber is connected to one of the air inlets of the low-pressure turbine through a pipeline;

[0009] The gas outlet of the high-pressure turbine is connected to the gas inlet of the heat exchanger and the other gas inlet of the low-pressure turbine through pipelines, the gas outlet of the low-pressure turbine is connected to the liquid water inlet of the heat exchanger, the water vapor outlet of the heat exchanger is connected to the gas inlet of the low-pressure compressor, the outlet of the low-pressure compressor is connected to the steam inlet of the high-pressure compressor and the other gas inlet of the hydrogen-oxygen-water vapor combustion chamber through pipelines; the other outlet of the heat exchanger is connected to the outside;

[0010] The hydrogen storage tank is communicated with the hydrogen inlet of the hydrogen-air combustion chamber, the hydrogen storage tank is communicated with the hydrogen inlet of the hydrogen-oxygen-steam combustion chamber, and the oxygen storage tank is communicated with the oxygen inlet of the hydrogen-oxygen-steam combustion chamber;

[0011] The water outlet of the water reservoir is connected to the pipeline connected to the gas inlet of the heat exchanger and the pipeline connected to the liquid water inlet of the heat exchanger through the power parts, the water inlet of the water reservoir is connected to the water outlet of the condenser, and the inlet of the condenser is connected to the pipeline connected to the water vapor outlet of the heat exchanger;

[0012] A low-pressure compressor stop valve 1 and a low-pressure compressor stop valve 2 are respectively provided on the pipeline connecting the outlet of the low-pressure compressor with the steam inlet of the high-pressure compressor and the pipeline connecting with the other inlet of the hydrogen-oxygen-water vapor combustion chamber. A high-pressure compressor stop valve 2 and a high-pressure compressor stop valve 1 are respectively provided on the pipeline connecting the outlet of the high-pressure compressor with the hydrogen-air combustion chamber and the pipeline connecting with one of the inlets of the hydrogen-oxygen-water vapor combustion chamber. A low-pressure turbine stop valve 2 is provided on the pipeline connecting the hydrogen-oxygen-water vapor combustion chamber with the low-pressure turbine. A high-pressure turbine stop valve 1 is provided on the pipeline connected to the high-pressure turbine, a high-pressure turbine stop valve 2 is provided on the pipeline connected to the hydrogen-air combustion chamber and the high-pressure turbine, a low-pressure turbine stop valve 1 is provided on the pipeline connected to the other air inlet of the low-pressure turbine, a gas inlet stop valve is provided on the pipeline connected to the gas inlet of the heat exchanger, a water inlet stop valve 2 is provided on the pipeline connected between the water outlet of the water reservoir and the pipeline connected to the gas inlet of the heat exchanger, and a water inlet stop valve 1 is provided on the pipeline connected between the water outlet of the water reservoir and the pipeline connected to the liquid water inlet of the heat exchanger.

[0013] Furthermore, the other outlet of the heat exchanger is respectively connected to a water pipe and a gas pipe, a water outlet stop valve is provided on the water pipe, and a gas outlet stop valve is provided on the gas pipe. The water pipe outputs hot water for heating, and the gas pipe is connected to the atmosphere.

[0014] Furthermore, the inlet of the condenser is connected to the pipe of the water vapor outlet of the heat exchanger through an inlet pipe, a condensing water vapor stop valve is provided on the inlet pipe of the condenser, and the outlet of the condenser is connected to the inlet of the water reservoir through a condensed water pipe.

[0015] Furthermore, an air inlet stop valve is provided on the pipeline connecting the high-pressure compressor with the outside world. When the air inlet stop valve is opened, air enters the air inlet of the high-pressure compressor from the pipeline.

[0016] Furthermore, a low-pressure turbine stop valve is arranged close to another air inlet of the low-pressure turbine, and a gas inlet stop valve is arranged close to a gas inlet of the heat exchanger.

[0017] Furthermore, the connection point between the water outlet of the water reservoir and the pipeline connected to the gas inlet of the heat exchanger is located between the gas inlet stop valve and the gas inlet of the heat exchanger.

[0018] Furthermore, the power component is a water pump.

[0019] Furthermore, the cold water flowing in the pipe connecting the water outlet of the water reservoir and the pipe connecting the gas inlet of the heat exchanger is heating cold water, and the cold water flowing in the pipe connecting the water outlet of the water reservoir and the pipe connecting the liquid water inlet of the heat exchanger is steam cold water.

[0020] Furthermore, the high-pressure compressor, the high-pressure turbine and the generator / starter 1 are all arranged on the rotating shaft 1, and the generator / starter 2, the low-pressure turbine and the low-pressure compressor are all arranged on the rotating shaft 2.

[0021] Another object of the present invention is to provide a working method of a hydrogen-oxygen-steam thermoelectric cycle system, which specifically includes:

[0022] Startup phase:

[0023] Low-pressure compressor stop valve 1 is closed, low-pressure compressor stop valve 2 is opened, high-pressure compressor stop valve 1 is closed, high-pressure compressor stop valve 2 is opened, high-pressure turbine stop valve 1 is closed, high-pressure turbine stop valve 2 is opened, low-pressure turbine stop valve 1 is closed, low-pressure turbine stop valve 2 is opened, gas inlet stop valve is opened, gas outlet stop valve is opened, water outlet stop valve is closed, water inlet stop valve 1 is opened, water inlet stop valve 2 is closed, air inlet stop valve is opened, condensed water vapor stop valve is closed;

[0024] Start the heat source subsystem, power the generator / starter motor 1, and work as the starter motor 1, driving the high-pressure compressor and the high-pressure turbine to rotate through the rotating shaft 1. The high-pressure compressor rotates, sucks in air, and pressurizes the air. The pressurized air enters the hydrogen-air combustion chamber and burns with the hydrogen from the hydrogen storage tank to generate high-temperature and high-pressure combustion gas. The combustion gas enters the high-pressure turbine, expands and does work, and the pressure and temperature of the combustion gas decrease. Then the combustion gas enters the heat exchanger and is finally discharged into the atmosphere. As the rotation speed of the rotating shaft 1 increases, the flow rates of air and hydrogen increase together.

[0025] The water vapor generation cycle subsystem is working, the generator / starter 2 is powered on, and works as the starter 2, driving the low-pressure compressor and the low-pressure turbine to rotate through the rotating shaft 2. After being pressurized by the water pump, a large amount of water enters the heat exchanger and is heated by the gas to become low-temperature and low-pressure water vapor; the low-temperature and low-pressure water vapor then enters the low-pressure compressor, and after being pressurized by the low-pressure compressor, the water vapor pressure increases, and enters the hydrogen-oxygen-water vapor combustion chamber, and chemically reacts with the hydrogen from the hydrogen storage tank and the oxygen from the oxygen storage tank to generate high-temperature water vapor; the high-temperature water vapor enters the low-pressure turbine, and after expansion and work, the water vapor temperature and pressure decrease; the water vapor is then mixed with water to cool down and become liquid water, and then enters the heat exchanger and becomes water vapor after being heated by the gas; as the speed of the rotating shaft 2 increases, the flow rates of water vapor, hydrogen, oxygen and water increase together;

[0026] Rated operating stage:

[0027] When the water vapor flow rate at the low-pressure compressor inlet reaches 30%-50% of the water vapor flow rate under the rated working condition of the thermoelectric cycle system, the thermoelectric cycle system starts up and starts to switch to the rated working condition; at this time, the low-pressure compressor stop valve 1 is opened, the low-pressure compressor stop valve 2 is closed, the high-pressure compressor stop valve 1 is opened, the high-pressure compressor stop valve 2 is closed, the high-pressure turbine stop valve 1 is opened, the high-pressure turbine stop valve 2 is closed, the low-pressure turbine stop valve 1 is opened, the low-pressure turbine stop valve 2 is closed, the gas inlet stop valve is closed, the gas outlet stop valve is closed, the water outlet stop valve is opened, the water inlet stop valve 1 is closed, the water inlet stop valve 2 is opened, the air inlet stop valve is closed, and the condensed water vapor stop valve is closed;

[0028] After being pressurized by the water pump, the heating cold water enters the heat exchanger to cool the water vapor at the outlet of the low-pressure turbine to generate hot water for heating, and the water vapor temperature is reduced to the design temperature of the water vapor at the inlet of the low-pressure compressor; after being pressurized by the low-pressure compressor and the high-pressure compressor, the water vapor enters the hydrogen-oxygen-water vapor combustion chamber, reacts chemically with the hydrogen from the hydrogen storage tank and the oxygen from the oxygen storage tank to generate high-temperature and high-pressure water vapor, and then expands and works through the high-pressure turbine and the low-pressure turbine, and the water vapor temperature and pressure are reduced; as the rotation speed of the rotating shaft 1 and the rotating shaft 2 increases, the flow rates of water vapor, hydrogen, oxygen and water increase together; when the water vapor flow rate at the outlet of the low-pressure turbine reaches the water vapor flow rate of the rated working condition of the thermoelectric cycle system, the condensed water vapor stop valve is opened, and the condensed water vapor passes through the condenser to become condensed water and enter the water reservoir; when the output power of the high-pressure turbine is greater than the power consumption of the high-pressure compressor, the starter 1 is converted into a generator to output electric power; when the output power of the low-pressure turbine is greater than the power consumption of the low-pressure compressor, the starter 2 is converted into a generator to output electric power.

[0029] Compared with the prior art, the beneficial effects of the hydrogen-oxygen-steam thermoelectric cycle system created by the present invention are:

[0030] (1) The hydrogen-oxygen-steam thermoelectric cycle system created by the present invention, through the principle of energy cascade utilization, uses the high-temperature heat source generated by the startup heat source subsystem itself to accelerate the generation of steam, so that the steam flow rate can reach the startup requirements in a short time.

[0031] (2) The present invention creates a hydrogen-oxygen-water vapor thermoelectric cycle system, whose components can run a variety of working fluids and realize a variety of functions. After the thermoelectric cycle system is successfully started, the heat source subsystem is started and transferred to the thermoelectric cycle system to realize the thermoelectric cycle system under hydrogen-oxygen-water vapor conditions.

[0032] (3) The hydrogen-oxygen-steam thermoelectric cycle system created by the present invention has a highly integrated design, a wide range of safe and stable operating conditions, solves the problem of requiring external heat and steam sources when the system is started, has a short start-up time, and is flexible and simple to operate.

[0033] (4) The hydrogen-oxygen-steam thermoelectric cycle system created by the present invention can achieve zero carbon and zero nitrogen oxide emissions after successful startup.

[0034] (5) The hydrogen-oxygen-steam thermoelectric cycle system created by the present invention has good starting characteristics of the thermodynamic cycle system. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0036] Figure 1 A schematic diagram of the structure of a hydrogen-oxygen-steam thermoelectric cycle system according to an embodiment of the present invention;

[0037] Figure 2 A flowchart of the startup of a hydrogen-oxygen-steam thermoelectric cycle system according to an embodiment of the present invention;

[0038] Figure 3 The present invention provides a flow chart of a hydrogen-oxygen-steam thermoelectric cycle system under rated operating conditions as described in an embodiment of the present invention.

[0039] Description of reference numerals:

[0040] 1. Low-pressure compressor; 2. High-pressure compressor; 3. Hydrogen-air combustion chamber; 4. Hydrogen storage tank; 5. Oxygen storage tank; 6. Hydrogen-oxygen-steam combustion chamber; 7. High-pressure turbine; 8. Generator / starter 1; 9. Low-pressure turbine; 10. Generator / starter 2; 11. Water pump; 12. Water reservoir; 13. Heat exchanger; 14. Rotating shaft 2; 15. Rotating shaft 1; 16. Low-pressure compressor stop valve 1; 17. Low-pressure compressor stop valve 2; 18. High-pressure compressor stop valve 1; 19. High-pressure compressor stop valve 2; 20. High-pressure turbine stop valve 2; 21. High-pressure turbine stop valve 1; 22. Low-pressure turbine stop valve 2; 23. Low-pressure turbine stop valve 1; 24. Gas inlet stop valve; 25. Gas outlet stop valve; 26. Water outlet stop valve; 27. Water inlet stop valve 1; 28. Water inlet stop valve 2; 29. ​​Air inlet stop valve; 30. Heating cold water; 31. Heating hot water; 32. Atmosphere; 33. Air; 34. Water vapor cold water; 35. Condenser; 36. Condensate water vapor stop valve; 37. Condensate. DETAILED DESCRIPTION

[0041] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0043] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0044] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0045] like Figure 1 As shown, a hydrogen-oxygen-steam thermoelectric cycle system includes a starting heat source subsystem and a steam generation cycle subsystem; the starting heat source subsystem includes a high-pressure compressor 2, a hydrogen-air combustion chamber 3, a hydrogen storage tank 4, a high-pressure turbine 7 and a generator / starter 8, and the high-pressure compressor 2, the high-pressure turbine 7 and the generator / starter 8 are coaxially arranged; the steam generation cycle subsystem includes a low-pressure compressor 1, a hydrogen-oxygen-steam combustion chamber 6, a hydrogen storage tank 4, an oxygen storage tank 5, a low-pressure turbine 9, a generator / starter 10, a heat exchanger 13 and a water reservoir 12, and the generator / starter 10, the low-pressure turbine 9 and the low-pressure compressor 1 are coaxially arranged;

[0046] The air inlet of the high-pressure compressor 2 is connected to the outside, the air outlet of the high-pressure compressor 2 is respectively connected to the air inlet of the hydrogen-air combustion chamber 3 and one of the air inlets of the hydrogen-oxygen-steam combustion chamber 6, the outlet of the hydrogen-air combustion chamber 3 and one of the outlets of the hydrogen-oxygen-steam combustion chamber 6 are respectively connected to the air inlet of the high-pressure turbine 7 through pipelines, and the other outlet of the hydrogen-oxygen-steam combustion chamber 6 is connected to one of the air inlets of the low-pressure turbine 9 through a pipeline;

[0047] The gas outlet of the high-pressure turbine 7 is connected to the gas inlet of the heat exchanger 13 and the other gas inlet of the low-pressure turbine 9 through pipelines, the gas outlet of the low-pressure turbine 9 is connected to the liquid water inlet of the heat exchanger 13, the water vapor outlet of the heat exchanger 13 is connected to the gas inlet of the low-pressure compressor 1, and the outlet of the low-pressure compressor 1 is connected to the steam inlet of the high-pressure compressor 2 and the other gas inlet of the hydrogen-oxygen-water vapor combustion chamber 6 through pipelines; the other outlet of the heat exchanger 13 is connected to the outside;

[0048] The hydrogen storage tank 4 is communicated with the hydrogen inlet of the hydrogen-air combustion chamber 3, the hydrogen storage tank 4 is communicated with the hydrogen inlet of the hydrogen-oxygen-steam combustion chamber 6, and the oxygen storage tank 5 is communicated with the oxygen inlet of the hydrogen-oxygen-steam combustion chamber 6;

[0049] The water outlet of the water reservoir 12 is connected to the pipeline connected to the gas inlet of the heat exchanger 13 and the pipeline connected to the liquid water inlet of the heat exchanger 13 through a power part, and the power part is a water pump 11; the water inlet of the water reservoir 12 is connected to the water outlet of the condenser 35, and the inlet of the condenser 35 is connected to the pipeline connected to the water vapor outlet of the heat exchanger 13;

[0050] A low-pressure compressor stop valve 16 and a low-pressure compressor stop valve 2 are respectively provided on the pipeline connecting the outlet of the low-pressure compressor 1 with the steam inlet of the high-pressure compressor 2 and the pipeline connecting with the other inlet of the hydrogen-oxygen-water vapor combustion chamber 6. A high-pressure compressor stop valve 2 19 and a high-pressure compressor stop valve 18 are respectively provided on the pipeline connecting the outlet of the high-pressure compressor 2 with the hydrogen-air combustion chamber 3 and the pipeline connecting with one of the inlets of the hydrogen-oxygen-water vapor combustion chamber 6. A low-pressure turbine stop valve 2 22 is provided on the pipeline connecting the hydrogen-oxygen-water vapor combustion chamber 6 with the low-pressure turbine 9. A low-pressure turbine stop valve 2 23 is provided on the pipeline connecting the hydrogen-oxygen-water vapor combustion chamber 6 with the high-pressure turbine 9. A high-pressure turbine stop valve 21 is provided on the pipeline connecting the hydrogen-air combustion chamber 3 and the high-pressure turbine 7, a high-pressure turbine stop valve 20 is provided on the pipeline connecting the hydrogen-air combustion chamber 3 and the high-pressure turbine 7, a low-pressure turbine stop valve 23 is provided on the pipeline connecting the other air inlet of the low-pressure turbine 9, a gas inlet stop valve 24 is provided on the pipeline connecting the gas inlet of the heat exchanger 13, a water inlet stop valve 28 is provided on the pipeline connecting between the water outlet of the water reservoir 12 and the pipeline connecting the gas inlet of the heat exchanger 13, and a water inlet stop valve 27 is provided on the pipeline connecting between the water outlet of the water reservoir 12 and the pipeline connecting the liquid water inlet of the heat exchanger 13.

[0051] A hydrogen-oxygen-steam thermoelectric cycle system of the present application, through the principle of energy cascade utilization, utilizes the high-temperature heat source generated by the startup heat source subsystem itself to accelerate the generation of steam, so that the steam flow rate can reach the startup requirements in a short time.

[0052] When the water vapor flow rate at the inlet of the low-pressure compressor 1 reaches 30% of the water vapor flow rate under the rated operating condition of the thermoelectric cycle system, the startup of the thermoelectric cycle system ends and begins to switch to the rated operating condition.

[0053] The other outlet of the heat exchanger 13 is connected to a water pipeline and a gas pipeline respectively. A water outlet stop valve 26 is provided on the water pipeline, and a gas outlet stop valve 25 is provided on the gas pipeline. The water pipeline outputs hot water 31 for heating, and the gas pipeline is connected to the atmosphere 32.

[0054] The inlet of the condenser 35 is connected to the pipe of the water vapor outlet of the heat exchanger 13 through the inlet pipe. A condensation water vapor stop valve 36 is provided on the inlet pipe of the condenser 35. The outlet of the condenser 35 is connected to the inlet of the water reservoir 12 through the condensation water pipe.

[0055] An air inlet stop valve 29 is provided on the pipeline connecting the high-pressure compressor 2 with the outside. When the air inlet stop valve 29 is opened, air 33 enters the air inlet of the high-pressure compressor 2 from the pipeline.

[0056] A low-pressure turbine stop valve 23 is arranged close to another air inlet of the low-pressure turbine 9, and a gas inlet stop valve 24 is arranged close to the gas inlet of the heat exchanger 13.

[0057] The connection point between the water outlet of the water reservoir 12 and the pipeline connected to the gas inlet of the heat exchanger 13 is located between the gas inlet stop valve 24 and the gas inlet of the heat exchanger 13 .

[0058] The cold water flowing in the pipe connecting the water outlet of the water reservoir 12 and the pipe connecting the gas inlet of the heat exchanger 13 is the heating cold water 30, and the cold water flowing in the pipe connecting the water outlet of the water reservoir 12 and the pipe connecting the liquid water inlet of the heat exchanger 13 is the water vapor cold water 34.

[0059] The high-pressure compressor 2, the high-pressure turbine 7 and the generator / starter 8 are all arranged on the rotating shaft 15, and the generator / starter 2 10, the low-pressure turbine 9 and the low-pressure compressor 1 are all arranged on the rotating shaft 2 14.

[0060] A hydrogen-oxygen-steam thermoelectric cycle system of the present application can be used in the field of hydrogen energy power generation and heating.

[0061] The present application also provides a working method of a hydrogen-oxygen-steam thermoelectric cycle system, specifically comprising:

[0062] like Figure 2 As shown, the startup phase:

[0063] The low-pressure compressor stop valve 16 is closed, the low-pressure compressor stop valve 2 17 is opened, the high-pressure compressor stop valve 18 is closed, the high-pressure compressor stop valve 2 19 is opened, the high-pressure turbine stop valve 1 21 is closed, the high-pressure turbine stop valve 2 20 is opened, the low-pressure turbine stop valve 1 23 is closed, the low-pressure turbine stop valve 2 22 is opened, the gas inlet stop valve 24 is opened, the gas outlet stop valve 25 is opened, the water outlet stop valve 26 is closed, the water inlet stop valve 1 27 is opened, the water inlet stop valve 2 28 is closed, the air inlet stop valve 29 is opened, and the condensed water vapor stop valve 36 is closed;

[0064] The heat source subsystem is started, the generator / starter 8 is powered on, and works as a starter, driving the high-pressure compressor 2 and the high-pressure turbine 7 to rotate through the rotating shaft 15. The high-pressure compressor 2 rotates, sucks in air 33, and pressurizes the air 33. The pressurized air 33 enters the hydrogen-air combustion chamber 3 and burns with the hydrogen from the hydrogen storage tank 4 to generate high-temperature and high-pressure combustion gas. The combustion gas enters the high-pressure turbine 7, and after expansion and work, the pressure and temperature of the combustion gas decrease, and then the combustion gas enters the heat exchanger 13 and is finally discharged into the atmosphere 32. As the rotation speed of the rotating shaft 15 increases, the flow rates of the air 33 and the hydrogen increase together.

[0065] The water vapor generation cycle subsystem is working, the generator / starter 2 10 is powered on, and works as the starter 2, driving the low-pressure compressor 1 and the low-pressure turbine 9 to rotate through the rotating shaft 2 14. After being pressurized by the water pump 11, a large amount of water enters the heat exchanger 13 and is heated by the gas to become low-temperature and low-pressure water vapor; the low-temperature and low-pressure water vapor then enters the low-pressure compressor 1, and after being pressurized by the low-pressure compressor 1, the water vapor pressure increases, and enters the hydrogen-oxygen-water vapor combustion chamber 6, and chemically reacts with the hydrogen from the hydrogen storage tank 4 and the oxygen from the oxygen storage tank 5 to generate high-temperature water vapor; the high-temperature water vapor enters the low-pressure turbine 9, and after expansion and work, the water vapor temperature and pressure decrease; the water vapor is then mixed with water to cool down and becomes liquid water, and then enters the heat exchanger 13, and becomes water vapor after being heated by the gas; as the speed of the rotating shaft 2 14 increases, the flow rates of water vapor, hydrogen, oxygen and water increase together;

[0066] like Figure 3 As shown, the rated operating stage:

[0067] When the water vapor flow rate at the inlet of the low-pressure compressor 1 reaches 30%-50% of the water vapor flow rate under the rated working condition of the thermoelectric cycle system, the thermoelectric cycle system starts up and starts to switch to the rated working condition; at this time, the low-pressure compressor stop valve 16 is opened, the low-pressure compressor stop valve 2 is closed, the high-pressure compressor stop valve 18 is opened, the high-pressure compressor stop valve 2 is closed, the high-pressure turbine stop valve 121 is opened, the high-pressure turbine stop valve 20 is closed, the low-pressure turbine stop valve 123 is opened, the low-pressure turbine stop valve 22 is closed, the gas inlet stop valve 24 is closed, the gas outlet stop valve 25 is closed, the water outlet stop valve 26 is opened, the water inlet stop valve 127 is closed, the water inlet stop valve 28 is opened, the air inlet stop valve 29 is closed, and the condensed water vapor stop valve 36 is closed;

[0068] After being pressurized by the water pump 11, the heating cold water 30 enters the heat exchanger 13, cools the water vapor at the outlet of the low-pressure turbine 9, and generates heating hot water 31. The water vapor temperature is reduced to the design temperature of the water vapor at the inlet of the low-pressure compressor 1; after being pressurized by the low-pressure compressor 1 and the high-pressure compressor 2, the water vapor enters the hydrogen-oxygen-water vapor combustion chamber 6, and chemically reacts with the hydrogen from the hydrogen storage tank 4 and the oxygen from the oxygen storage tank 5 to generate high-temperature and high-pressure water vapor, which is then expanded and worked by the high-pressure turbine 7 and the low-pressure turbine 9, and the water vapor temperature and pressure are reduced; as the shaft rotates, the water vapor is compressed by the high-pressure turbine 7 and the low-pressure turbine 9, and the water vapor is compressed by the high-pressure turbine 7 and the low-pressure turbine 9, and the water vapor temperature and pressure are reduced. The rotation speeds of shaft 15 and shaft 2 14 increase, and the flow rates of water vapor, hydrogen, oxygen and water increase together; when the water vapor flow rate at the outlet of the low-pressure turbine 9 reaches the water vapor flow rate at the rated operating condition of the thermoelectric cycle system, the condensed water vapor stop valve 36 opens, and the condensed water vapor passes through the condenser 35 and becomes condensed water, and enters the water reservoir 12; when the output power of the high-pressure turbine 7 is greater than the power consumption of the high-pressure compressor 2, the starter 1 is converted into a generator to output electric power; when the output power of the low-pressure turbine 9 is greater than the power consumption of the low-pressure compressor 1, the starter 2 is converted into a generator to output electric power.

[0069] Under rated conditions, the parameters of the thermoelectric cycle system are as follows: the low-pressure compressor inlet temperature is 110°C, the pressure is 102kPa, and the water vapor flow rate is 100kg / s; the low-pressure compressor outlet pressure is 3000kPa; the high-pressure compressor outlet pressure is 5000kPa; the hydrogen flow rate is 2.27kg / s; the oxygen flow rate is 18.16kg / s; the water vapor temperature at the combustion chamber outlet is 1500°C; the high-pressure turbine outlet pressure is 3500kPa; the low-pressure turbine outlet pressure is 104kPa; the heating hot water flow rate is 300kg / s, the pressure is 1600kPa, the temperature is 120°C, and the simple cycle power generation efficiency is 32%.

[0070] The embodiments of the invention disclosed above are only used to help illustrate the invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the invention, so that those skilled in the art can understand and use the invention well.

Claims

1. A hydrogen-oxygen-steam thermoelectric cycle system, characterized in that: The invention comprises a starting heat source subsystem and a water vapor generation circulation subsystem; the starting heat source subsystem comprises a high-pressure compressor (2), a hydrogen-air combustion chamber (3), a hydrogen storage tank (4), a high-pressure turbine (7) and a generator / starter motor (8); the high-pressure compressor (2), the high-pressure turbine (7) and the generator / starter motor (8) are coaxially arranged; the water vapor generation circulation subsystem comprises a low-pressure compressor (1), a hydrogen-oxygen-water vapor combustion chamber (6), a hydrogen storage tank (4), an oxygen storage tank (5), a low-pressure turbine (9), a generator / starter motor (10), a heat exchanger (13) and a water reservoir (12); the generator / starter motor (10), the low-pressure turbine (9) and the low-pressure compressor (1) are coaxially arranged; The air inlet of the high-pressure compressor (2) is connected to the outside, the air outlet of the high-pressure compressor (2) is respectively connected to the air inlet of the hydrogen-air combustion chamber (3) and one of the air inlets of the hydrogen-oxygen-steam combustion chamber (6), the outlet of the hydrogen-air combustion chamber (3) and one of the outlets of the hydrogen-oxygen-steam combustion chamber (6) are respectively connected to the air inlet of the high-pressure turbine (7) through a pipeline, and the other outlet of the hydrogen-oxygen-steam combustion chamber (6) is connected to one of the air inlets of the low-pressure turbine (9) through a pipeline; The gas outlet of the high-pressure turbine (7) is connected to the gas inlet of the heat exchanger (13) and the other gas inlet of the low-pressure turbine (9) through pipelines, the gas outlet of the low-pressure turbine (9) is connected to the liquid water inlet of the heat exchanger (13), the water vapor outlet of the heat exchanger (13) is connected to the gas inlet of the low-pressure compressor (1), and the outlet of the low-pressure compressor (1) is connected to the steam inlet of the high-pressure compressor (2) and the other gas inlet of the hydrogen-oxygen-water vapor combustion chamber (6) through pipelines; the other outlet of the heat exchanger (13) is connected to the outside; The hydrogen storage tank (4) is communicated with the hydrogen inlet of the hydrogen-air combustion chamber (3), the hydrogen storage tank (4) is communicated with the hydrogen inlet of the hydrogen-oxygen-steam combustion chamber (6), and the oxygen storage tank (5) is communicated with the oxygen inlet of the hydrogen-oxygen-steam combustion chamber (6); The water outlet of the water reservoir (12) is connected to a pipeline connected to a gas inlet of a heat exchanger (13) and a pipeline connected to a liquid water inlet of the heat exchanger (13) through a power member, respectively; the water inlet of the water reservoir (12) is connected to a water outlet of a condenser (35); and the inlet of the condenser (35) is connected to a pipeline connected to a water vapor outlet of the heat exchanger (13); A low-pressure compressor stop valve 1 (16) and a low-pressure compressor stop valve 2 (17) are provided on the pipeline connecting the outlet of the low-pressure compressor (1) with the steam inlet of the high-pressure compressor (2) and the pipeline connecting the other inlet of the hydrogen-oxygen-water vapor combustion chamber (6), respectively. A high-pressure compressor stop valve 2 (19) and a high-pressure compressor stop valve 1 (18) are provided on the pipeline connecting the outlet of the high-pressure compressor (2) with the hydrogen-air combustion chamber (3) and the pipeline connecting one of the inlets of the hydrogen-oxygen-water vapor combustion chamber (6), respectively. A low-pressure turbine stop valve 2 (22) is provided on the pipeline connecting the hydrogen-oxygen-water vapor combustion chamber (6) with the low-pressure turbine (9), and a low-pressure turbine stop valve 3 (42) is provided on the pipeline connecting the hydrogen-oxygen-water vapor combustion chamber (6) with the high-pressure turbine (9). A high-pressure turbine stop valve (21) is provided on the pipeline connecting the hydrogen-air combustion chamber (3) and the high-pressure turbine (7); a high-pressure turbine stop valve (20) is provided on the pipeline connecting the hydrogen-air combustion chamber (3) and the high-pressure turbine (7); a low-pressure turbine stop valve (23) is provided on the pipeline connecting the other air inlet of the low-pressure turbine (9); a gas inlet stop valve (24) is provided on the pipeline connecting the gas inlet of the heat exchanger (13); a water inlet stop valve (28) is provided on the pipeline connecting the water outlet of the water reservoir (12) and the pipeline connecting the gas inlet of the heat exchanger (13); and a water inlet stop valve (27) is provided on the pipeline connecting the water outlet of the water reservoir (12) and the pipeline connecting the liquid water inlet of the heat exchanger (13).

2. A hydrogen-oxygen-steam thermoelectric cycle system according to claim 1, characterized in that: The other outlet of the heat exchanger (13) is communicated with a water pipeline and a gas pipeline respectively. A water outlet stop valve (26) is provided on the water pipeline, and a gas outlet stop valve (25) is provided on the gas pipeline. The water pipeline outputs hot water (31) for heating, and the gas pipeline is communicated with the atmosphere (32).

3. A hydrogen-oxygen-steam thermoelectric cycle system according to claim 2, characterized in that: The inlet of the condenser (35) is connected to the pipe connected to the water vapor outlet of the heat exchanger (13) through the inlet pipe, a condensing water vapor stop valve (36) is provided on the inlet pipe of the condenser (35), and the outlet of the condenser (35) is connected to the inlet of the water reservoir (12) through the condensed water pipe.

4. A hydrogen-oxygen-steam thermoelectric cycle system according to claim 3, characterized in that: An air inlet stop valve (29) is provided on a pipeline connecting the high-pressure compressor (2) with the outside. When the air inlet stop valve (29) is opened, air (33) enters the air inlet of the high-pressure compressor (2) from the pipeline.

5. The hydrogen-oxygen-steam thermoelectric cycle system according to claim 1, characterized in that: The low-pressure turbine stop valve 1 (23) is arranged close to another air inlet of the low-pressure turbine (9), and the gas inlet stop valve (24) is arranged close to the gas inlet of the heat exchanger (13).

6. The hydrogen-oxygen-steam thermoelectric cycle system according to claim 1, characterized in that: The connection point between the water outlet of the water reservoir (12) and the pipeline connected to the gas inlet of the heat exchanger (13) is located between the gas inlet stop valve (24) and the gas inlet of the heat exchanger (13).

7. The hydrogen-oxygen-steam thermoelectric cycle system according to claim 1, characterized in that: The power part is a water pump (11).

8. The hydrogen-oxygen-steam thermoelectric cycle system according to claim 1, characterized in that: The cold water flowing in the pipe connecting the water outlet of the water reservoir (12) and the pipe connecting the gas inlet of the heat exchanger (13) is the heating cold water (30), and the cold water flowing in the pipe connecting the water outlet of the water reservoir (12) and the pipe connecting the liquid water inlet of the heat exchanger (13) is the steam cold water (34).

9. The hydrogen-oxygen-steam thermoelectric cycle system according to claim 1, characterized in that: The high-pressure compressor (2), the high-pressure turbine (7) and the generator / starter motor 1 (8) are all arranged on the rotating shaft 1 (15), and the generator / starter motor 2 (10), the low-pressure turbine (9) and the low-pressure compressor (1) are all arranged on the rotating shaft 2 (14).

10. The operating method of a hydrogen-oxygen-steam thermoelectric cycle system according to claim 4, characterized in that: Specifically include Startup phase: The low-pressure compressor stop valve 1 (16) is closed, the low-pressure compressor stop valve 2 (17) is opened, the high-pressure compressor stop valve 1 (18) is closed, the high-pressure compressor stop valve 2 (19) is opened, the high-pressure turbine stop valve 1 (21) is closed, the high-pressure turbine stop valve 2 (20) is opened, the low-pressure turbine stop valve 1 (23) is closed, the low-pressure turbine stop valve 2 (22) is opened, the gas inlet stop valve (24) is opened, the gas outlet stop valve (25) is opened, the water outlet stop valve (26) is closed, the water inlet stop valve 1 (27) is opened, the water inlet stop valve 2 (28) is closed, the air inlet stop valve (29) is opened, and the condensed water vapor stop valve (36) is closed; The heat source subsystem is started, and the generator / starter motor 1 (8) is energized to work as a starter motor 1, and the high-pressure compressor (2) and the high-pressure turbine (7) are driven to rotate through the rotating shaft 1 (15). The high-pressure compressor (2) rotates, sucks in air (33), and pressurizes the air (33). The pressurized air (33) enters the hydrogen-air combustion chamber (3) and burns with hydrogen from the hydrogen storage tank (4) to generate high-temperature and high-pressure combustion gas. The combustion gas enters the high-pressure turbine (7), and after expansion and work, the pressure and temperature of the combustion gas decrease. Then the combustion gas enters the heat exchanger (13) and is finally discharged into the atmosphere (32). As the rotation speed of the rotating shaft 1 (15) increases, the flow rates of the air (33) and hydrogen increase together. The water vapor generation cycle subsystem is working, the generator / starter 2 (10) is energized, and works as the starter 2, driving the low-pressure compressor (1) and the low-pressure turbine (9) to rotate through the rotating shaft 2 (14). After being pressurized by the water pump (11), a large amount of water enters the heat exchanger (13) and is heated by the fuel gas to become low-temperature and low-pressure water vapor; the low-temperature and low-pressure water vapor then enters the low-pressure compressor (1), and after being pressurized by the low-pressure compressor (1), the water vapor pressure increases, and enters the hydrogen-oxygen-water vapor combustion chamber (6), and chemically reacts with the hydrogen from the hydrogen storage tank (4) and the oxygen from the oxygen storage tank (5) to generate high-temperature water vapor; The high-temperature water vapor enters the low-pressure turbine (9), and after expansion and work, the temperature and pressure of the water vapor decrease; the water vapor is then mixed with water to cool down and becomes liquid water, and then enters the heat exchanger (13), and is heated by the gas to become water vapor; as the speed of the rotating shaft 2 (14) increases, the flow rates of water vapor, hydrogen, oxygen and water increase together; Rated operating stage: When the water vapor flow rate at the inlet of the low-pressure compressor (1) reaches 30%-50% of the water vapor flow rate under the rated operating condition of the thermoelectric cycle system, the thermoelectric cycle system starts up and begins to switch to the rated operating condition; at this time, the low-pressure compressor stop valve 1 (16) is opened, the low-pressure compressor stop valve 2 (17) is closed, the high-pressure compressor stop valve 1 (18) is opened, the high-pressure compressor stop valve 2 (19) is closed, the high-pressure turbine stop valve 1 (21) is opened, the high-pressure turbine stop valve 2 (20) is closed, the low-pressure turbine stop valve 1 (23) is opened, the low-pressure turbine stop valve 2 (22) is closed, the gas inlet stop valve (24) is closed, the gas outlet stop valve (25) is closed, the water outlet stop valve (26) is opened, the water inlet stop valve 1 (27) is closed, the water inlet stop valve 2 (28) is opened, the air inlet stop valve (29) is closed, and the condensed water vapor stop valve (36) is closed; After being pressurized by the water pump (11), the heating cold water (30) enters the heat exchanger (13), cools the water vapor at the outlet of the low-pressure turbine (9), and generates heating hot water (31). The water vapor temperature is reduced to the design temperature of the water vapor at the inlet of the low-pressure compressor (1). After being pressurized by the low-pressure compressor (1) and the high-pressure compressor (2), the water vapor enters the hydrogen-oxygen-water vapor combustion chamber (6), and chemically reacts with the hydrogen from the hydrogen storage tank (4) and the oxygen from the oxygen storage tank (5) to generate water vapor, which is then expanded by the high-pressure turbine (7) and the low-pressure turbine (9) to perform work, and the water vapor temperature and pressure are reduced. As the rotation As the rotation speeds of shaft one (15) and rotating shaft two (14) increase, the flow rates of water vapor, hydrogen, oxygen and water also increase; when the water vapor flow rate at the outlet of the low-pressure turbine (9) reaches the water vapor flow rate at the rated operating condition of the thermoelectric cycle system, the condensed water vapor stop valve (36) opens, and the condensed water vapor passes through the condenser (35) and becomes condensed water, which enters the water reservoir (12); when the output power of the high-pressure turbine (7) is greater than the power consumption of the high-pressure compressor (2), the starter one is converted into a generator to output electric power; when the output power of the low-pressure turbine (9) is greater than the power consumption of the low-pressure compressor (1), the starter two is converted into a generator to output electric power.

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