Power generation apparatus, gas turbine cycle system, and control method thereof

Abstract

The embodiment of the present application provides a power generation equipment, a gas turbine cycle system and a control method thereof. The inhaled air is compressed by an air compression device to obtain first compressed air, and the first compressed air is heated by a solar heating device, so that the pressure and temperature of the first compressed air are increased to become second compressed air. Since the gas combustion device can burn the mixed gas, and the mixed gas is mixed with the gas and the second compressed air, the combustion device can generate the combustion gas with higher temperature and pressure, and finally, the combustion gas is input into the expander to do work. Compared with the prior art, by changing the mixing ratio and / or total amount of the mixed gas, the amount of the combustion gas input into the expander can be changed, and then the power of the work done can be changed, so that the adjustment response speed is faster. And the internal energy of the first compressed air is increased by using solar energy, and the efficiency of the work done is improved.

Description

Technical Field

[0001] This invention relates to the field of energy utilization technology, and in particular to a power generation device, a gas turbine cycle system, and a control method thereof. Background Technology

[0002] To achieve carbon peaking and carbon neutrality goals, the industrial structure can be optimized, for example, by increasing the proportion of wind and solar power generation. However, as the proportion of unstable renewable energy sources such as photovoltaics and wind power continues to increase, the volatility of their power generation severely impacts the stable operation of the power grid, limiting its potential for further development.

[0003] Currently, solar thermal power generation technology mainly adopts mature parabolic trough or tower systems, using heat transfer oil or molten salt as the intermediate heat medium, and employing steam Rankine cycle power generation technology, resulting in good power generation stability. However, in order to improve the system's power generation efficiency, high-parameter steam is often used. High-parameter steam leads to a large thermal inertia of the power generation system, slow response speed, and a certain limitation on rapid peak-shaving capability. At the same time, a large amount of thermal storage system will increase costs. Summary of the Invention

[0004] The present invention provides a power generation device, a gas turbine cycle system and a control method thereof, which solves the technical problems of slow response speed and low energy conversion efficiency of existing solar thermal power generation systems.

[0005] In a first aspect, the present invention provides a gas turbine cycle system through an embodiment of the present invention, comprising: an air compression device having an air inlet and a compressed air outlet, the air compression device being used to draw in air and compress the air to obtain first compressed air; a solar heating device having an inlet connected to the compressed air outlet, the solar heating device being used to heat the first compressed air using solar energy, and outputting heated second compressed air from the outlet of the solar heating device; a gas combustion device having a gas inlet and a combustion gas outlet, the gas inlet being connected to the outlet of the solar heating device, the gas combustion device being used to combust a mixed gas, the mixed gas containing gas input from the gas inlet and the second compressed air, and discharging the combusted gas from the combustion gas outlet; and an expander having an inlet connected to the combustion gas outlet, the expander being used to perform work on the outside using the combusted gas, thereby reducing the temperature of the combusted gas to become exhaust gas.

[0006] Preferably, the air compression device includes a plurality of air compressors connected in series; the outlet of at least one air compressor is connected to the inlet of the solar heating device to heat a portion of the compressed air using solar energy; and the outlet of at least one air compressor is connected to the inlet of the expander to cool the expander using a portion of the compressed air.

[0007] Preferably, the system further includes: a heat exchange device, which is provided with a heating circuit and a heat exchange circuit, wherein the heating circuit and the heat exchange circuit are independent of each other, the heating circuit is connected to the outlet of the expander, and the heat exchange circuit is connected to the inlet of the solar heating device and the cooling air inlet of the expander; the heat exchange device is used to heat the first compressed air using the exhaust gas discharged from the expander.

[0008] Preferably, the system further includes: a steam generating device, which is provided with a heating chamber and an evaporation chamber, the heating chamber being connected to the heating circuit of the heat exchange device, and the steam generating device being used to heat the fluid in the evaporation chamber using the exhaust gas discharged from the heat exchange device, so as to generate gas in the evaporation chamber.

[0009] Preferably, the system further includes a steam turbine, wherein the evaporation chamber of the steam generating device is connected to the air inlet of the steam turbine, and the steam turbine is used to perform work on the outside using the gas in the evaporation chamber.

[0010] Preferably, the system further includes a multi-effect evaporator, the inlet of which is connected to the evaporation chamber of the steam generating device, the multi-effect evaporator being used to distill the target liquid using the gas in the evaporation chamber.

[0011] Secondly, through an embodiment of the present invention, a gas turbine cycle system control method is provided for controlling a gas turbine cycle system as described in any of the first aspects, comprising: controlling the air compression device to compress air to obtain first compressed air; controlling the solar heating device to heat the first compressed air to output second compressed air; controlling the amount of second compressed air and / or gas entering the gas combustion device during the combustion of the mixed gas to produce afterburner gas in the gas combustion device; and controlling the amount of afterburner gas introduced into the expander according to the target power of external work.

[0012] Preferably, the control method further includes: controlling the solar heating device to heat a portion of the compressed air output by the air compressor; and controlling a portion of the compressed air output by the air compressor to cool the expander.

[0013] Preferably, the control method further includes: controlling a heat exchange device to heat the first compressed air using the exhaust gas discharged from the expander.

[0014] Thirdly, through an embodiment of the present invention, a power generation device is provided, comprising: a control device and a gas turbine cycle system as described in any of the first aspects; the control device is electrically connected to the air compressor, the solar heating device, the gas combustion device, and the expander; the control device comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement any of the embodiments in the second aspect.

[0015] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0016] The intake air is compressed by an air compressor to obtain first compressed air. This first compressed air is then heated by solar energy using a solar heating device, increasing its pressure and temperature to become second compressed air. Since the gas combustion device can burn the gas mixture, which contains both fuel gas and the second compressed air, it produces combustion gases with higher temperatures and pressures. Finally, these combustion gases are fed into an expander to perform work.

[0017] Current power generation systems that utilize steam for external work suffer from low efficiency, and the high thermal inertia of steam results in a slow response time for power generation adjustment. In contrast, this invention, by changing the mixing ratio and / or total amount of the mixed gas, can alter the amount of post-combustion gas input into the expander, thereby changing the power output and achieving a faster adjustment response. Furthermore, utilizing solar energy to increase the internal energy of the first compressed air further improves the efficiency of external work. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the gas turbine cycle system structure in an embodiment of the present invention;

[0020] Figure 2 This is a flowchart of the gas turbine cycle system control method in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the power generation equipment control device in an embodiment of the present invention. Detailed Implementation

[0022] This invention provides a gas turbine cycle system and its control method, which solves the technical problems of slow response speed and low energy conversion efficiency in existing solar thermal power generation systems.

[0023] The technical solution provided by the embodiments of the present invention is to solve the above-mentioned technical problems, and the general idea is as follows:

[0024] By setting up an air compressor and controlling the air compressor to draw in and compress air, a first compressed air is obtained; by setting up a solar heating device and controlling the solar heating device to heat the first compressed air using solar energy, the pressure and temperature of the first compressed air are increased, and a heated second compressed air is output; by setting up a gas combustion device and controlling the gas combustion device to burn the mixed gas and discharge the combustion gas; by setting up an expander and inputting the combustion gas into the expander, the expander can perform work on the outside.

[0025] By changing the mixing ratio and / or total amount of the gas mixture, the amount of post-combustion gas input into the expander can be altered, thereby changing the power output and achieving a faster adjustment response. Furthermore, utilizing solar energy increases the internal energy of the first compressed air, improving the efficiency of external work.

[0026] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0027] First, it should be clarified that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0028] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in sequences other than those illustrated or described herein.

[0029] The gas turbine cycle is a thermodynamic cycle consisting of four processes: adiabatic compression, isobaric heating, adiabatic expansion, and isobaric cooling. It is the working principle of air-breathing jet engines and gas turbines. Simple gas turbine cycle units have fast start-up, shutdown, and load change speeds, are compact, highly reliable, and consume virtually no water during the cycle. However, their energy conversion efficiency in a single cycle is relatively low.

[0030] To improve the energy conversion efficiency in a gas turbine cycle, in a first aspect, the present invention provides a gas turbine cycle system through an embodiment of the invention. (See attached image.) Figure 1 As shown, the gas turbine cycle system may include: an air compressor 100, a solar heating device 200, a gas combustion device 300, and an expander 400.

[0031] Specifically, the air compressor 100 is provided with an air inlet and a compressed air outlet. The air compressor 100 is used to draw in air and compress the air to obtain first compressed air.

[0032] In practical implementation, the air compression device 100 may include multiple air compressors connected in series. Alternatively, these air compressors may be partially connected in series to form an air compression group, which may then be connected in parallel; or all of these air compressors may be connected in parallel. The number of air compressors can be determined according to actual usage requirements.

[0033] In practice, at least one air compressor outlet is connected to the inlet of the solar heating device 200 to heat a portion of the compressed air using solar energy. The outlet of the downstream air compressor in the series connection can be connected to the solar heating device 200, ensuring that the compressed air with the highest compression degree enters the solar heating device 200, thereby increasing the pressure and temperature of this portion of compressed air entering the solar heating device 200. It is understood that any air compressor outlet in the series connection can also be connected to the solar heating device 200, and the number of air compressors connected to the solar heating device 200 can be one or more.

[0034] In practice, at least one air compressor outlet is connected to the inlet of expander 400 to utilize a portion of the compressed air for cooling expander 400. To reduce the impact on the first compressed air pressure, the outlet of the upstream air compressor in the tandem queue can be connected to expander 400, allowing the least compressed portion of the compressed air to enter expander 400, thus avoiding waste of higher-temperature and higher-pressure compressed air. It is understood that the outlet of any air compressor in the tandem queue can also be connected to expander 400, and the number of air compressors connected to expander 400 can be one or more.

[0035] Specifically, the solar heating device 200 has its inlet connected to the compressed air outlet. The solar heating device 200 is used to heat the first compressed air using solar energy, and the heated second compressed air is output from the outlet of the solar heating device 200.

[0036] In the specific implementation process, the solar heating device 200 uses mirror field focusing to heat the first compressed air. The solar heating device 200 may include a solar heat absorption tower and a solar thermal tower.

[0037] Specifically, the gas combustion device 300 is provided with a gas inlet and a combustion gas outlet. The gas inlet is connected to the outlet of the solar heating device 200. The gas combustion device 300 is used to burn a mixed gas, which contains gas input from the gas inlet and a second compressed air, and the combusted gas is discharged from the combustion gas outlet.

[0038] In practical implementation, to fully utilize the second compressed air, the gas introduced into the gas combustion device 300 can be compressed gas. For example... Figure 1 As shown, a gas compressor 500 can be installed at the gas inlet of the gas combustion device 300 to compress the gas.

[0039] Specifically, the expander 400 is connected to the combustion gas exhaust port. The expander 400 is used to perform work on the outside by utilizing the combustion gas, thereby reducing the temperature of the combustion gas and turning it into exhaust gas.

[0040] In practical implementation, expanders 400 may be multiple, and these expanders 400 can be arranged in series. Of course, these expanders 400 can also be partially connected in series to form an expander unit, and the expander unit can then be arranged in parallel; or all of these expanders 400 can be arranged in parallel. The number of expanders 400 can be set according to actual usage requirements.

[0041] In practical implementation, at least one expander 400's inlet is connected to the combustion gas outlet of the gas combustion device 300 to utilize the combusted gas for external work. The outlet of the upstream expander 400 in the series can be connected to the combustion gas outlet of the gas combustion device 300, and a re-combustion device 1400 can be installed at the outlet of this upstream expander 400 to reuse the incompletely combusted gas in the gas combustion device 300, improving gas utilization efficiency. It is understood that the cooling air inlet of any expander 400 in the series can also be connected to the air compressor 100, and each air compressor can be connected to a corresponding expander 400 to ensure the cooling requirements of the expanders 400.

[0042] To heat or cool the gas in the aforementioned gas turbine cycle system, such as Figure 1 As shown, a heat exchange device 600 can also be provided. The heat exchange device 600 includes a heating circuit and a heat exchange circuit, which are independent of each other. The heating circuit is connected to the outlet of the expander 400, and the heat exchange circuit is connected to the inlet of the solar heating device 200 and the cooling air inlet of the expander 400. The heat exchange device 600 is used to heat the first compressed air using the exhaust gas discharged from the expander 400.

[0043] It should be noted that the exhaust gas discharged from the expander 400 enters the heating circuit of the heat exchanger 600, and the compressed air enters the heat exchange circuit of the heat exchanger 600. The two circuits are independent and not connected. This allows the heat from the exhaust gas to be used to heat the gas in the heat exchange circuit, for example, to heat the compressed air intended for entry into the solar heating device 200.

[0044] In specific implementation, the heat exchange device 600 may include multiple devices. A heat exchange device 600 may be installed between the solar heating device 200 and the air compressor 100 to further heat the compressed air intended to enter the solar heating device 200. Alternatively, a heat exchange device 600 may be installed between the air compressor 100 and the cooling air inlet of the expander 400 to improve the cooling effect on the expander 400.

[0045] To further utilize the exhaust gas emitted by the expander 400 and improve the overall energy efficiency of the system, such as... Figure 1 As shown, a steam generating device 700 can also be provided. The steam generating device 700 is provided with a heating chamber and an evaporation chamber. The heating chamber is connected to the heating circuit of the heat exchange device 600. The steam generating device 700 is used to heat the fluid in the evaporation chamber using the exhaust gas discharged from the heat exchange device 600, so as to generate gas in the evaporation chamber.

[0046] In the specific implementation process, the fluid in the evaporation chamber can be water. In order to protect the evaporation chamber from oxidation and corrosion and improve the service life of the entire evaporation circuit, the fluid in the evaporation chamber can be water that has been desalted and deoxygenated.

[0047] Correspondingly, such as Figure 1 As shown, a deaerator 800 and a feed water pump 900 can be installed in the evaporation circuit to provide desalinated and deoxygenated water to the evaporation chamber. In specific implementations, the deaerator 800 can capture oxygen in the evaporation circuit, reducing the oxygen content in the evaporation circuit. The steam generating unit 700 can include multiple steam generators connected in series. Of course, these steam generators can also be partially connected in series to form a steam generator group, and the steam generator group can be arranged in parallel; or all of these steam generators can be arranged in parallel. The number of steam generators can be set according to actual usage requirements.

[0048] In practical implementation, the heating chamber of at least one steam generator is connected to the heating circuit of the heat exchange device 600 to heat the heating chamber using the heat of the waste gas, thereby heating the evaporation chamber to generate steam. The heating chamber of the upstream steam generator in the series can be connected to the heating circuit of the heat exchange device 600 so that the waste gas with the highest temperature and pressure enters the heating chamber, thereby increasing the steam output.

[0049] In addition, each steam generator's evaporation chamber can be connected to a corresponding water pump 900 to ensure that there is sufficient water in the evaporation chamber for evaporation.

[0050] Understandably, in order to utilize the energy of steam, such as Figure 1 As shown, a steam turbine 1000 can also be installed. The evaporation chamber of the steam generating device 700 is connected to the air inlet of the steam turbine 1000, so that the steam turbine 1000 can use the gas in the evaporation chamber to do work, further improving the utilization of waste gas.

[0051] Preferably, the steam turbine 1000 can be connected to the evaporation chamber of the upstream steam generator in the series queue to obtain steam with the highest temperature and pressure, thereby increasing the amount of work done by the steam turbine 1000.

[0052] Furthermore, in order to make fuller use of the energy of the gas produced by the steam generating unit 700, such as... Figure 1 As shown, a multi-effect evaporator 1100 can also be provided. The air inlet of the multi-effect evaporator 1100 is connected to the evaporation chamber of the steam generating device 700. The multi-effect evaporator 1100 is used to distill the target liquid using the gas in the evaporation chamber.

[0053] In practical implementation, the inlet of the multi-effect evaporator 1100 can also be connected to the outlet of the steam turbine 1000 to fully utilize the generated steam. The target liquid can be a mixed solution, such as seawater or other inorganic salt solutions.

[0054] Taking seawater as the target liquid as an example, the steam generated by the steam generating device 700 and the steam from the steam outlet of the steam turbine 1000 are fed into the multi-effect evaporator 1100. The multi-effect evaporator 1100 can use the heat of the steam to distill the seawater and produce fresh water and inorganic salts.

[0055] As an optional implementation, the unused waste gas in the heating chamber of the steam generating device 700 can be passed into the inorganic salts produced by the multi-effect evaporator 1100 to further remove moisture from the seawater by utilizing the characteristics of unsaturated waste gas. Simultaneously, the CO2 in the waste gas can react with the Ca in the seawater. 2+ Mg 2+ Plasma bonding reduces seawater hardness and increases the production of inorganic salts.

[0056] It should be noted that by simply controlling the combustion state of the aforementioned gas combustion device 300 and the amount of post-combustion gas introduced into the expander 400, the amount of work done by the system can be changed. Since the combustion state and the amount of post-combustion gas can be adjusted in a short time, the system's response speed for adjusting its work output is relatively fast. Furthermore, the expander 400 and the turbine 1000 can perform work on a generator, enabling the system to generate electricity. During power generation, the system exhibits the technical advantages of fast power output adjustment response and high power generation efficiency.

[0057] To better understand the application of the above system, a brief example will be provided below. Please continue reading... Figure 1 As shown, the air compression device 100 may include three compressors connected in series: a primary compressor 101, a secondary compressor 102, and a tertiary compressor 103. The expander 400 may include three expanders connected in series: a primary expander 401, a secondary expander 402, and a tertiary expander 403. The heat exchange device 600 includes a main regenerator 601, a primary cooling air regenerator 602, and a secondary cooling air regenerator 603.

[0058] The outlet of the primary compressor 101 is connected to the inlet of the secondary compressor 102, the secondary expander 402, and the cooling air inlet of the tertiary expander 403; the outlet of the secondary compressor 102 is connected to the inlet of the tertiary compressor 103 and the secondary cooling air regenerator 603; and the outlet of the tertiary compressor 103 is connected to the inlet of the primary cooling air regenerator 602 and the main regenerator 601.

[0059] The heat exchange circuit of the main regenerator 601 is connected to the inlet of the solar heating device 200; the heat exchange circuit of the primary cooling air regenerator 602 is connected to the cooling air inlet of the primary expander 401; and the heat exchange circuit of the secondary cooling air regenerator 603 is connected to the cooling air inlet of the primary expander 401. The heating circuit of the main regenerator 601 is also connected to the heating circuits of the primary cooling air regenerator 602 and the secondary cooling air regenerator 603, as well as the heating chamber of the steam generation device 700.

[0060] Please continue reading Figure 1 As shown, the steam generation unit 700 may include a first steam generator 701 and a second steam generator 702. The evaporation chamber of the first steam generator 701 is connected to the steam turbine 1000 and the multi-effect evaporator 1100; the steam outlet of the steam turbine 1000 is also connected to the multi-effect evaporator 1100. The heating chamber of the first steam generator 701 is connected to the heating chamber of the second steam generator 702, and the heating chamber of the second steam generator 702 is connected to the drying tower 1200.

[0061] The drying tower 1200 is used to dry and recrystallize the inorganic salts produced by the multi-effect evaporator 1100 using waste gas, so as to increase the yield of inorganic salts.

[0062] The fluid in the evaporation circuit is desalinated and deoxygenated water; the target liquid introduced into the multi-effect evaporator 1100 is seawater.

[0063] When the raw material air at normal temperature and pressure is compressed to 0.38 MPa by the first-stage compressor 101, it then enters the air precooler 1300 and is cooled to 85°C. It is then compressed to 1.16 MPa by the second-stage compressor 102, and then cooled to 138°C by the air precooler 1300. Finally, it is compressed to 3.18 MPa by the third-stage compressor 103, and the temperature is raised to 296°C.

[0064] Next, the high-temperature and high-pressure compressed air is divided into two parts. One part of the compressed air is heated by the main regenerator 601, and the temperature is raised to 383.5°C. Then it enters the solar heating device 200. After the temperature of the compressed air inside the solar heating device 200 is raised to 800°C, it enters the gas combustion device 300 and mixes with the gas for combustion, resulting in combustion gas at a temperature of 1350°C.

[0065] After combustion, the gas enters the first-stage expander 401 to do work (temperature drops to 948℃). After being exhausted from the first-stage expander 401, it enters the re-combustion device 1400 to mix and burn again with the fuel gas. The temperature rises to 1248℃ and then enters the second-stage expander 402 and the third-stage expander 403 to do work (temperature drops to 870℃). The exhaust gas from the third-stage expander 403 is divided into two parts. One part of the exhaust gas exchanges heat with the main regenerator 601 (heats the compressed air at the outlet of the third-stage compressor 103) and is cooled to 306℃. The other part of the exhaust gas exchanges heat with the first-stage cooling air regenerator 602 (heats the compressed air entering the first-stage expander 401) and is cooled to 603℃. It also exchanges heat with the second-stage cooling air regenerator 603 (heats the compressed air entering the second-stage expander 402) and is cooled to 575.8℃.

[0066] After the two portions of waste gas merge, they enter the steam generation unit 700, which utilizes the waste heat of the waste gas to generate steam. Since the waste gas temperature is highest in the first steam generator 701, it can generate saturated steam at 10 bar, while the second steam generator 702 generates saturated steam at 4 bar. After passing through the steam generation unit 700, the temperature of the waste gas drops to approximately 120°C. This portion of waste gas can be used as a heat source for drying concentrated seawater, or it can come into full contact with seawater to further concentrate the seawater and increase the production of inorganic salts.

[0067] The 10 bar steam generated by the first steam generator 701 will first drive the steam turbine 1000 to do work. The 4 bar steam from the back pressure of the steam turbine 1000 enters the steam header 1500 and is combined with the 4 bar steam generated by the second steam generator 702. It is then fed into the multi-effect evaporator 1100 as the heat source for the multi-effect evaporator 1100, thereby enabling the desalination of seawater using the multi-effect evaporator 1100.

[0068] The circulation system provided in this embodiment of the invention, compared with existing simple circulation systems or combined circulation systems, can reduce the consumption of natural gas and generate a variety of by-products, such as fresh water and salt, while maintaining roughly the same power output. Please refer to Table 1 below for details.

[0069] Table 1. Output Comparison between the cyclic system of the present invention and existing cyclic systems

[0070] Natural gas consumption (t / h) 31 50 50 Electricity generation (MW) 259 230 342 Fresh water delivery (t / h) 4000 / / Deliver concentrated brine (t / h) 7000 / /

[0071] Furthermore, the system provided in this embodiment of the invention can shut down the gas combustion device 300 and use only the solar heating device 200. For example, ambient temperature and pressure raw material air is compressed to 0.38 MPa by an air compressor, then cooled to 128°C by an air precooler 1300, compressed to 1.16 MPa by a secondary compressor 102, cooled to 134°C by an air precooler 1300, and compressed to 2.85 MPa by a tertiary compressor 103, raising the temperature to 273°C.

[0072] Next, the high-temperature and high-pressure compressed air is divided into two parts. One part of the compressed air enters the solar heating device 200, where the temperature is raised to 800°C. It then enters the expander 400 to do work. After the expander 400 does work, it discharges exhaust gas at a temperature of 207°C.

[0073] The 207°C waste gas enters the steam generation unit 700, which utilizes the waste heat to generate steam. After passing through the steam generation unit 700, the temperature of the waste gas drops to approximately 138°C. This portion of the waste gas can be used as a heat source for drying concentrated seawater, or it can come into full contact with seawater to further concentrate the seawater and increase the production of inorganic salts.

[0074] The circulating system provided in this embodiment of the invention, compared with existing simple circulating systems or combined circulating systems, can generate electricity without consuming gas and produce a variety of byproducts, such as fresh water and salt, as shown in Table 2 below.

[0075] Table 2. Output comparison between the circulation system of the present invention and the existing circulation system when gas is shut off.

[0076] Natural gas consumption (t / h) 0 50 50 Electricity generation (MW) 62 230 342 Fresh water delivery (t / h) 1230 / / Deliver concentrated brine (t / h) 2460 / /

[0077] This invention, by utilizing renewable solar energy and natural gas, improves system stability and overall efficiency, and can also be used independently as a solar power generation system. The system provided by this invention can desalinate seawater using waste gas, making fuller use of the system's energy, reducing energy waste, and improving overall energy utilization efficiency.

[0078] Secondly, through an embodiment of the present invention, the present invention provides a gas turbine cycle system control method for controlling any gas turbine cycle system as described in the first aspect. Please refer to [link to relevant documentation]. Figure 2 As shown, the control method may include the following steps:

[0079] Step S201: Control the air compression device 100 to compress the air to obtain the first compressed air.

[0080] Step S202: Control the solar heating device 200 to heat the first compressed air so as to output the second compressed air.

[0081] Step S203: During the process of the gas combustion device 300 burning the mixed gas to produce the combustion gas, the amount of the second compressed air and / or gas entering the gas combustion device 300 is controlled.

[0082] Step S204: Control the amount of post-combustion gas introduced into the expander 400 according to the target power of external work.

[0083] As an optional implementation, the control method may further include: controlling the solar heating device 200 to heat a portion of the compressed air output by the air compressor 100; and controlling a portion of the compressed air output by the air compressor 100 to cool the expander 400.

[0084] As an optional implementation, the control method may further include: controlling the heat exchange device 600 to heat the first compressed air using the exhaust gas discharged from the expander 400.

[0085] Since the gas turbine cycle system control method described in this embodiment is the method used to implement the gas turbine cycle system in this embodiment of the invention, those skilled in the art can understand the specific implementation methods and various variations of the method described in this embodiment based on the gas turbine cycle system control method described in this embodiment of the invention. Therefore, how this method implements the method in this embodiment of the invention will not be described in detail here. As long as those skilled in the art implement the method used in the gas turbine cycle system in this embodiment of the invention, they are all within the scope of protection of this invention.

[0086] Thirdly, through an embodiment of the present invention, a power generation device is provided, comprising: a control device and a gas turbine cycle system as described in any of the first aspects; the control device is electrically connected to an air compressor 100, a solar heating device 200, a gas combustion device 300, and an expander 400; the control device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement any of the embodiments described in the second aspect.

[0087] refer to Figure 3 As shown, the control device provided in this embodiment of the invention includes: a memory 301, a processor 302, and code stored in the memory and executable on the processor 302. When the processor 302 executes the code, it implements any of the embodiments of the gas turbine cycle system control method described above.

[0088] Among them, Figure 3In this document, a bus architecture (represented by bus 300) is used. Bus 300 may include any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 302 and memory represented by memory 301. Bus 300 may also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 305 provides an interface between bus 300 and receiver 303 and transmitter 304. Receiver 303 and transmitter 304 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 302 is responsible for managing bus 300 and general processing, while memory 301 can be used to store data used by processor 302 during operation.

[0089] The technical solutions in the above embodiments of the present invention have at least the following technical effects or advantages:

[0090] The intake air is compressed by the air compressor 100 to obtain first compressed air. The first compressed air is then heated by solar energy using the solar heating device 200, increasing its pressure and temperature to become second compressed air. Since the gas combustion device 300 can burn the mixed gas, which contains both gas and the second compressed air, the combustion device can produce combustion gas with higher temperature and pressure. Finally, the combustion gas is fed into the expander 400 to perform work.

[0091] Current power generation systems that utilize steam for external work suffer from low efficiency, and the high thermal inertia of steam results in a slow response speed for power generation adjustment. In contrast, this invention, by changing the mixing ratio and / or total amount of the mixed gas, can alter the amount of post-combustion gas input into the expander 400, thereby changing the power output and achieving a faster adjustment response speed. Furthermore, utilizing solar energy to increase the internal energy of the first compressed air further improves the efficiency of external work.

[0092] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable code.

[0093] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer instructions. These computer instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0094] These computer instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0095] These computer instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0096] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0097] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A gas turbine cycle system, characterized in that, include: An air compression device is provided with an air inlet and a compressed air outlet. The air compression device is used to draw in air and compress the air to obtain first compressed air. A solar heating device, wherein the inlet of the solar heating device is connected to the outlet of the compressed air, the solar heating device is used to heat the first compressed air using solar energy, and the heated second compressed air is output from the outlet of the solar heating device; A gas combustion device is provided with a gas inlet and a combustion gas outlet. The gas inlet is connected to the outlet of the solar heating device. The gas combustion device is used to burn a mixed gas, which contains gas input from the gas inlet and the second compressed air, and the combusted gas is discharged from the combustion gas outlet. An expander is provided, with its inlet connected to the combustion gas outlet. The expander is used to perform work on the external environment using the combustion gas, thereby reducing the temperature of the combustion gas to become exhaust gas. The air compression device includes multiple air compressors connected in series. The outlet of the uppermost air compressor in the series is connected to the expander to cool the expander using a portion of compressed air with the lowest compression degree.

2. The system as described in claim 1, characterized in that, At least one air compressor outlet is connected to the inlet of the solar heating device to utilize solar energy to heat a portion of the compressed air.

3. The system as described in claim 1, characterized in that, The system also includes: The heat exchange device is provided with a heating circuit and a heat exchange circuit. The heating circuit and the heat exchange circuit are independent of each other. The heating circuit is connected to the outlet of the expander, and the heat exchange circuit is connected to the inlet of the solar heating device and the cooling air inlet of the expander. The heat exchange device is used to heat the first compressed air using the exhaust gas discharged from the expander.

4. The system as described in claim 3, characterized in that, The system also includes: The steam generating device is provided with a heating chamber and an evaporation chamber. The heating chamber is connected to the heating circuit of the heat exchange device. The steam generating device is used to heat the fluid in the evaporation chamber with the exhaust gas discharged from the heat exchange device to generate gas in the evaporation chamber.

5. The system as described in claim 4, characterized in that, The system also includes: A steam turbine, wherein the evaporation chamber of the steam generating device is connected to the steam turbine's air inlet, and the steam turbine is used to perform work on the outside using the gas in the evaporation chamber.

6. The system as described in claim 5, characterized in that, The system also includes: A multi-effect evaporator, wherein the air inlet of the multi-effect evaporator is connected to the evaporation chamber of the steam generating device, and the multi-effect evaporator is used to distill the target liquid using the gas in the evaporation chamber.

7. A control method for a gas turbine cycle system, used to control the gas turbine cycle system as described in any one of claims 1-6, characterized in that, include: The air compression device is controlled to compress air to obtain first compressed air; The solar heating device is controlled to heat the first compressed air in order to output the second compressed air; During the process of the gas combustion device burning the mixed gas to produce post-combustion gas, the amount of second compressed air and / or gas entering the gas combustion device is controlled; The amount of post-combustion gas introduced into the expander is controlled according to the target power of the external work.

8. The control method as described in claim 7, characterized in that, Also includes: The solar heating device is controlled to heat a portion of the compressed air output by the air compressor. A portion of the compressed air output from the air compression device is used to cool the expander.

9. The control method as described in claim 7, characterized in that, Also includes: The first compressed air is heated by controlling the heat exchange device to utilize the exhaust gas discharged from the expander.

10. A power generation device, characterized in that, include: Control device and gas turbine cycle system as described in any one of claims 1-6; The control device is electrically connected to the air compressor, the solar heating device, the gas combustion device, and the expander. The control device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method of any one of claims 7-9.

Images