Trigeneration system, operation method, equipment, medium and product

Abstract

The invention relates to the technical field of energy, in particular to a trigeneration system, an operation method, equipment, a medium and a product to improve the energy conversion efficiency, in the energy storage process of the system, an air compression module compresses air from a normal pressure state to a high pressure state through a compressor, and the air is stored in an air storage hole, so that electric energy is converted into air internal energy. In the energy releasing process, the natural gas power generation module conducts combustion power generation through high-pressure air released by a gas storage hole and external natural gas and generates waste smoke, and the organic Rankine cycle module obtains waste heat from a compressor through an intercooler and an aftercooler, obtains first waste heat in the waste smoke through a heat recoverer and converts the first waste heat into additional electric energy. The absorption refrigeration module obtains second waste heat of the waste flue gas and converts residual heat energy into cold energy.

Description

Technical Field

[0001] The present application relates to the field of energy technology, and in particular to a trigeneration system, an operation method, a device, a medium and a product. Background Art

[0002] As the global greenhouse gas emissions problem becomes increasingly serious, the use of fossil fuels has had a significant impact on the environment, prompting widespread attention and application of renewable energy.

[0003] However, existing renewable energy generation technologies, especially wind and photovoltaic power generation, have serious intermittency and instability, making it difficult to achieve stable and continuous power supply, especially during peak hours when users use electricity, making it even more difficult to meet continuous power demand, resulting in low overall energy conversion efficiency. Summary of the invention

[0004] The present invention provides a trigeneration system, an operation method, a device, a medium and a product for improving energy conversion efficiency.

[0005] In a first aspect, the present application provides a trigeneration system, the system comprising:

[0006] The compressed air module is used to compress the air from normal pressure to high pressure through a compressor during the system energy storage process and store it in the air storage cave to convert electrical energy into air internal energy;

[0007] A natural gas power generation module is used to generate electricity by burning the high-pressure air released through the gas storage hole with external natural gas during the energy release process of the system, and to generate waste flue gas;

[0008] an organic Rankine cycle module, for obtaining waste heat from the compressor through an intercooler and an aftercooler, obtaining first waste heat from the waste flue gas through a heat recovery device, and converting the first waste heat into additional electrical energy;

[0009] The absorption refrigeration module is used to obtain the second waste heat of the waste flue gas and convert the second waste heat into cold energy.

[0010] Optionally, the compressor is a multi-stage compressor consisting of at least one low-pressure compressor and a plurality of high-pressure compressors, and the multi-stage compressor also includes an intercooler and an aftercooler.

[0011] Optionally, the outlet of the multi-stage compressor is connected to the air storage cave, and the outlet of the air storage cave is connected to a pressure regulating valve, and the pressure regulating valve is used to adjust the pressure of the air to supply gas to the combustion chamber of the natural gas power generation unit.

[0012] Optionally, the natural gas power generation unit further includes a combustion chamber, a gas turbine and a heat recovery device, and the natural gas power generation unit is also used to preheat the high-pressure air through the heat recovery device in combination with the exhaust gas discharged from the gas turbine.

[0013] Optionally, the organic Rankine cycle module further includes a first circulation submodule and a second circulation submodule, the first circulation submodule and the second circulation submodule share a condenser, an expander and a pump, and the organic Rankine cycle module controls the working fluid flow in the first circulation submodule and the second circulation submodule through multiple regulating valves.

[0014] Optionally, the absorption refrigeration module also includes a desorber, a condenser, an evaporator, and an absorber, wherein the desorber is used to perform heat exchange with the exhaust gas of the heat exchanger through a lithium bromide solution, and to transport the generated water vapor to the condenser; the condenser is used to condense the water vapor into liquid water, and to transport the liquid water to the evaporator through a throttle valve; the evaporator is used to evaporate liquid water at room temperature to generate cooling water and generate cold energy; the absorber is used to absorb the cooling water through a concentrated lithium bromide solution to generate a dilute lithium bromide solution.

[0015] In a second aspect, the present application provides an operation method of a trigeneration system, the method comprising:

[0016] During the system energy storage process, the compressed air module compresses the air from normal pressure to high pressure through the compressor and stores it in the air storage cave to convert electrical energy into air internal energy; the organic Rankine cycle module obtains waste heat from the compressor through the intercooler and aftercooler;

[0017] During the energy release process of the system, the natural gas power generation module generates electricity by burning the high-pressure air released by the gas storage hole with external natural gas, and produces waste flue gas; the organic Rankine cycle module obtains the first waste heat in the waste flue gas through a heat recovery device, and converts the first waste heat into additional electrical energy; the absorption refrigeration module obtains the second waste heat of the waste flue gas, and converts the second waste heat into cold energy.

[0018] In a third aspect, the present application provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, any one of the trigeneration system operation methods described in the second aspect is implemented.

[0019] In a fourth aspect, the present application provides a computer storage medium, wherein the computer-readable storage medium stores computer program instructions, and the computer program instructions are executed by a processor to implement any method for operating a trigeneration system in the second aspect.

[0020] In a fifth aspect, an embodiment of the present application provides a computer program product, including computer program instructions, which, when executed by a processor, implement any one of the trigeneration system operation methods in the second aspect.

[0021] The beneficial effects of the present invention are as follows:

[0022] The system includes a compressed air module, a natural gas power generation module, an organic Rankine cycle module and an absorption refrigeration module. During the system energy storage process, the compressed air module compresses the air from a normal pressure state to a high pressure state through a compressor and stores it in a gas storage cave to convert electrical energy into air internal energy. During the system energy release process, the natural gas power generation module generates electricity by burning high-pressure air released from the gas storage cave with external natural gas, and produces waste flue gas. The organic Rankine cycle module obtains waste heat from the compressor through an intercooler and an aftercooler, obtains the first waste heat in the waste flue gas through a heat recovery device, and converts the first waste heat into additional electrical energy. The absorption refrigeration module obtains the second waste heat of the waste flue gas and converts the remaining heat energy into cold energy. In this way, the compressed air module can ensure the effective storage of energy, and can effectively store excess electrical energy when the power demand is low, providing a sufficient basis for subsequent energy release. In addition, the organic Rankine cycle module can recover the low-grade waste heat of the compressed air module and convert it into electrical energy. During the energy release process of the system, the absorption refrigeration module and the organic Rankine cycle module work together to further recover the waste heat generated by the natural gas power generation system and convert it into cold and electrical energy, so that the trigeneration system of the embodiment of the present application can provide refrigeration, heating and power generation functions at the same time, and store excess electrical energy during peak power supply periods and release it during peak demand periods, thereby achieving peak shaving and valley filling, black start, load regulation and improving power quality, greatly improving energy conversion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0024] Figure 1 A schematic diagram of the structure of a trigeneration system provided in an embodiment of the present application;

[0025] Figure 2 Schematic diagram of the effects of different system structures and working fluids on performance provided in the embodiments of the present application;

[0026] Figure 3 A schematic diagram of the structure of a computer device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme in the embodiment of the present application will be clearly and completely described below in conjunction with the drawings in the embodiment of the present application. Obviously, the described embodiment is only a part of the embodiment of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be arbitrarily combined with each other. In addition, although the logical order is shown in the flow chart, in some cases, the steps shown or described can be performed in an order different from that here.

[0028] The terms "first" and "second" in the specification and claims of the present application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the term "comprising" and any of their variations are intended to cover non-exclusive protection. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices. "Multiple" in the present application can mean at least two, for example, can be two, three or more, and the embodiments of the present application are not limited.

[0029] The term "and / or" in the embodiments of the present application is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0030] The following is a brief introduction to the design concept of the embodiments of the present application.

[0031] As the global greenhouse gas emissions problem becomes increasingly serious, the use of fossil fuels has had a significant impact on the environment, giving rise to widespread attention and application of renewable energy. According to the 2020 global renewable electricity statistics released by the International Energy Agency (IEA), the share of renewable energy in global electricity generation has reached 27%, showing the rapid growth of renewable energy.

[0032] However, existing renewable energy generation technologies, especially wind and photovoltaic power generation, have serious intermittency and instability, making it difficult to achieve stable and continuous power supply, especially during peak hours when users use electricity, making it even more difficult to meet continuous power demand, resulting in low overall energy conversion efficiency.

[0033] In view of the above problems, the embodiment of the present application provides a trigeneration system and its operation method, which includes a compressed air module, a natural gas power generation module, an organic Rankine cycle module and an absorption refrigeration module. During the system energy storage process, the compressed air module compresses the air from a normal pressure state to a high pressure state through a compressor, and stores it in a gas storage cave to convert electrical energy into air internal energy. During the system energy release process, the natural gas power generation module burns the high-pressure air released by the gas storage cave with external natural gas to generate electricity and produce waste flue gas. The organic Rankine cycle module obtains waste heat from the compressor through an intercooler and an aftercooler, obtains the first waste heat in the waste flue gas through a heat recovery device, and converts the first waste heat into additional electrical energy. The absorption refrigeration module obtains the second waste heat of the waste flue gas and converts the remaining heat energy into cold energy. In this way, the compressed air module can ensure the effective storage of energy, and can effectively store excess electrical energy when the power demand is low, providing a sufficient basis for subsequent energy release. In addition, the organic Rankine cycle module can recover the low-grade waste heat of the compressed air module and convert it into electrical energy. During the energy release process of the system, the absorption refrigeration module and the organic Rankine cycle module work together to further recover the waste heat generated by the natural gas power generation system and convert it into cold and electrical energy, so that the trigeneration system of the embodiment of the present application can provide refrigeration, heating and power generation functions at the same time, and store excess electrical energy during peak power supply periods and release it during peak demand periods, thereby achieving peak shaving and valley filling, load regulation and improving power quality, greatly improving energy conversion efficiency.

[0034] The following briefly introduces the application scenarios to which the technical solutions of the embodiments of the present application can be applied. It should be noted that the application scenarios introduced below are only used to illustrate the embodiments of the present application and are not limited. In the specific implementation process, the technical solutions provided by the embodiments of the present application can be flexibly applied according to actual needs.

[0035] The solution provided by the embodiment of the present application can be applied to most application scenarios that require efficient power supply and / or cold energy, heat energy, and electric energy supply, and is used to improve energy conversion efficiency, for example, in industrial parks, commercial centers, or residential areas where power demand fluctuates greatly, especially during high temperatures in summer, the air conditioning load increases significantly, resulting in peak power demand. The system and method provided by the embodiment of the present application can use the remaining electric energy to power the compressed air module when the power demand is low (such as at night), compress the air and store it in the air storage cave. When the power demand reaches the peak, the stored high-pressure air is released through the natural gas power generation module, and the natural gas is burned to generate electricity, quickly providing additional electricity, and the absorption refrigeration module and the organic Rankine cycle module work together to further recover the waste heat generated by the natural gas power generation system and convert it into cold and electricity. It can not only effectively balance the power demand and avoid the risk of insufficient power supply or power outages due to excessive instantaneous demand, but also provide refrigeration, heating and power generation functions at the same time to meet the diverse needs of users.

[0036] Of course, the method provided in the embodiment of the present application is not limited to the above application scenarios, but can also be used in other possible application scenarios, which are not limited by the embodiment of the present application. The functions that can be realized by each device in the above application scenarios will be described in the subsequent method embodiments, and no further details will be given here.

[0037] Below, in combination with the application scenarios described above, the system and method provided by the exemplary embodiments of the present application are described with reference to the accompanying drawings. It should be noted that the above application scenarios are only shown to facilitate understanding of the spirit and principles of the present application, and the embodiments of the present application are not limited in this regard.

[0038] like Figure 1 FIG. 1 is a schematic diagram of a trigeneration system provided in an embodiment of the present application, the system comprising:

[0039] The compressed air module is used to compress the air from normal pressure to high pressure through a compressor during the system energy storage process, and store it in the air storage cavern to convert electrical energy into air internal energy.

[0040] The natural gas power generation module is used to generate electricity by burning the high-pressure air released through the gas storage hole and external natural gas during the system's energy release process, and to produce waste flue gas.

[0041] The organic Rankine cycle module is used to obtain waste heat from the compressor through an intercooler and an aftercooler, obtain first waste heat in the exhaust gas through a heat recovery device, and convert the first waste heat into additional electrical energy.

[0042] The absorption refrigeration module is used to obtain the second waste heat of the waste flue gas and convert the remaining heat energy into cold energy.

[0043] In a possible implementation, the compressor of the compressed air module may be composed of at least one low-pressure compressor (LPC) and a plurality of high-pressure compressors (HPC), that is, Figure 1 The LPC and HPC1-HPC6 shown in the figure form a multi-stage compressor, which is used to compress air through renewable energy or excess power from the power grid to obtain high-pressure air, which can further improve the thermal efficiency of the system. The compression medium of the compressor can be air, which is not specifically limited in the embodiment of the present application. In addition, the multi-stage compressor may also include an intercooler (Intercoolers, Intc) and an aftercooler (Aftercooler, Aftc), such as Figure 1 Intc1-Intc6 and Aftc shown in the figure can improve thermal efficiency. In this way, compressed air technology, as a long-term mechanical energy storage technology, has the advantages of large capacity, long life, and fast response speed. The use of multi-stage compressors can further improve energy storage efficiency and reduce water accumulation and carbon emissions.

[0044] In a possible implementation, the outlet of the multi-stage compressor of the compressed air module is connected to the air storage cavity, for example Figure 1 The cavern is an underground storage unit for storing high-pressure air. It can be a large cave such as a salt cave, a mine cave, a rock cave or a large underground gas storage reservoir. The embodiment of the present application does not specifically limit this. The compressed air will be stored in the cavern for use by the natural gas power generation module. The outlet of the cavern is connected to a pressure regulating valve. After the pressure regulating valve adjusts the pressure of the air, it will become the combustion chamber (Com) of the natural gas power generation unit. Figure 1 Com1 and Com2 shown in the figure supply gas, while the natural gas power generation module will use the high-pressure air stored in the underground cave and the purchased natural gas to generate electricity to meet the electricity demand.

[0045] In a possible implementation, the natural gas power generation unit further includes a combustion chamber, a gas turbine and a heat recovery device (Rec). The natural gas power generation unit can preheat the high-pressure air by combining the exhaust gas discharged from the gas turbine with the heat recovery device.

[0046] Specifically, as above Figure 1As shown, the natural gas power generation unit includes two-stage combustion chambers Com1 and Com2, and two-stage gas turbines, such as a high-pressure turbine (High-Pressure Turbine, HPT) and a low-pressure turbine (Low-Pressure Turbine, LPT), and a heat recovery device Rec. The natural gas power generation unit can use the exhaust gas discharged from the low-pressure gas turbine to preheat the air, and the two-stage combustion chambers and the two-stage gas turbines can be connected in sequence in the order of Com1-HPT-Com2-LPT.

[0047] In a possible implementation, the organic Rankine cycle module further includes a first circulation submodule and a second circulation submodule. The first circulation submodule and the second circulation submodule share a condenser, an expander and a pump, and the organic Rankine cycle module can control the flow of working fluids in the first circulation submodule and the second circulation submodule through a plurality of regulating valves.

[0048] Specifically, the first circulation submodule is ORC1, which includes an evaporator composed of an intercooler (Intc1-Intc6) and an aftercooler (Aftc), an expander (OT), a condenser and a pump (Pump). OCR1 can use the intercooler (Intc1-Intc6) and the aftercooler (Aftc) to recover low-grade waste heat from the multi-stage compressor of the compressed air module, and the working fluid of the intercooler and the aftercooler is the working fluid of ORC1, and they are arranged in parallel and use a mother pipe. The gaseous organic working fluid performs work to generate electricity in the expander (OT) of OCR1, and the condenser and the pump maintain the circulation of the organic working fluid in OCR1. The second circulation submodule is ORC2, which uses a heat recovery device (Rec) to recover waste heat from the waste flue gas discharged from the low-pressure turbine (LPT) of the natural gas power generation unit and convert it into additional electrical energy. And the gaseous organic working fluid performs work and generates electricity in the expander (OT) of OCR2, and the condenser and pump (Pump) maintain the circulation of the organic working fluid in OCR2. In the organic Rankine cycle module, three regulating valves (V1, V2, V3) are also used to control the working fluid flow rate in the module. The three-way valve (V1) gathers the high-pressure gaseous working fluid passing through the evaporator in ORC1 and ORC2, and its outlet is connected to the expander (OT). The low-pressure working fluid passing through the expander is condensed into liquid by the condenser and then distributed to ORC1 and ORC2 through two regulating valves (V2, V3) after passing through the pump (Pump). The regulating valve V3 controls the working fluid flow rate in ORC1, and the regulating valve V2 controls the working fluid flow rate in ORC2. The working fluid of the organic Rankine cycle module can be R290, and the embodiment of the present application does not make specific restrictions on this. In this way, the organic Rankine cycle module can distribute and control the working fluid flow rate in the first circulation submodule and the second circulation submodule through multiple regulating valves, and essentially only one set of working fluid is circulated.

[0049] In a possible embodiment, the absorbent of the absorption refrigeration module includes a lithium bromide solution, and the refrigerant includes water. The absorption refrigeration module also includes a desorber, a condenser, an evaporator, and an absorber. The desorber performs heat exchange with the exhaust gas of the heat exchanger through the lithium bromide solution, and transports the generated water vapor to the condenser. The condenser condenses the water vapor into liquid water, and transports the liquid water to the evaporator through a throttle valve. The evaporator evaporates the liquid water at room temperature to generate cooling water and cold energy. The absorber absorbs the cooling water through the concentrated lithium bromide solution to generate a dilute lithium bromide solution.

[0050] Specifically, the lithium bromide solution in the desorber (Desober) of the absorption refrigeration module exchanges heat with the exhaust gas from the heat exchanger (HX), and the generated water vapor enters the condenser (Condenser). The water vapor is condensed into liquid water in the condenser (Condenser), and the liquid water enters the evaporator (Evp1) through the throttle valve (Ev1). In the evaporator (Evp1), the liquid water absorbs the heat in the environment and evaporates to generate cold energy. The water vapor generated in the evaporator (Evp1) is absorbed by the concentrated lithium bromide solution in the absorber (Abs) to generate a dilute lithium bromide solution. At the same time, the concentrated lithium bromide solution in the desorber (Desober) exchanges heat with the dilute solution through the heat exchanger (HX), and then enters the absorber (Abs) through the throttle valve (Ev2), combines with the refrigerant vapor and is diluted into a dilute solution.

[0051] In one possible implementation, the waste heat contained in the waste gas generated by the natural gas power generation unit can be used to preheat the high-pressure air, and then the waste heat can be recovered by using ORC2, and then further recovered by using the absorption refrigeration module. The waste heat generated by the operation of the compressed air module can be recovered by using ORC1.

[0052] For the convenience of description, the above parts are divided into each unit module (or module) according to the function and described separately. Of course, when implementing the present application, the functions of each unit (or module) can be implemented in the same one or more software or hardware. It can be understood by those skilled in the art that various aspects of the present application can be implemented as a system, method or program product. Therefore, various aspects of the present application can be specifically implemented in the following forms, namely: a complete hardware implementation method, a complete software implementation method (including firmware, microcode, etc.), or an implementation method combining hardware and software, which can be collectively referred to as "circuit", "module" or "system" here.

[0053] The present application also provides an operation method of a trigeneration system, and the specific implementation process of the method is as follows:

[0054] During the system energy storage process, the compressed air module compresses the air from normal pressure to high pressure through a compressor and stores it in the air storage cave to convert electrical energy into air internal energy; the organic Rankine cycle module obtains waste heat from the compressor through an intercooler and aftercooler.

[0055] During the energy release process of the system, the natural gas power generation module generates electricity by burning the high-pressure air released from the gas storage hole with external natural gas, and produces waste flue gas. The organic Rankine cycle module obtains the first waste heat from the waste flue gas through the heat recovery device and converts the first waste heat into additional electrical energy. The absorption refrigeration module obtains the second waste heat from the waste flue gas and converts the second waste heat into cold energy.

[0056] Specifically, in the energy storage process of the trigeneration system, the excess electricity generated by renewable energy or the power grid drives the multi-stage compressor of the compressed air module, which can compress the air into high-pressure air stored in the gas storage caverns such as underground caverns. This process converts electrical energy into air internal energy. At the same time, ORC1 recovers the waste heat of the multi-stage compressor through the intercooler (Intc1-Intc6) and the aftercooler (Aftc), and the above series of processes will be repeated in a closed cycle. In the energy release process of the trigeneration system, the regulating valve (Reg) at the outlet of the underground cavern will be opened to supply gas to the natural gas power generation module, and the hot flue gas generated by the natural gas power generation module will enter the turbine for expansion and power generation. However, the flue gas temperature at the turbine outlet is still very high, and there is a lot of waste heat. The waste heat will be divided into three parts for recovery in turn, one part is used to preheat the high-pressure air, one part is used to drive ORC2 to generate more electricity, and finally the remaining part is used to drive the absorption refrigeration module to generate cold energy, so that more waste heat can be recovered and the energy conversion efficiency can be improved. Specifically, under the system design of the embodiment of the present application, the trigeneration system can generate 206MW of electricity, 28MW of heat and 0.2MW of cooling capacity, and the energy efficiency ratio (COP) of the absorption refrigeration module is 0.74.

[0057] In one possible implementation, a steady-state model of the operation process of the trigeneration system of the embodiment of the present application can be developed in a process simulation software, including but not limited to Aspen Plus, and the input parameters are considered based on the actual industrial operation conditions. During the simulation process, the working principles of each unit in the trigeneration system are first analyzed, and the corresponding modules are selected. According to the transfer state and direction of the fluid and energy in the system, each module is connected by logistics, work flow, and heat flow. After the model is built, enter the parameter setting page. Set the physical parameters of the entire system, and enter the logistics parameters and the parameters of each module. After setting all the conditions, test run the entire process. After the operation is completed, obtain the corresponding operation report, and determine whether to continue adjusting the parameters based on the operation report, or directly extract the results after confirming that the operation is correct. In this way, the performance of different working fluids and different systems can be evaluated through the developed steady-state model. Figure 2 As shown in the figure, CAES only on the horizontal axis means that only the compressed air module is used without the organic Rankine cycle module (ORC). CAES+ORC means a system that combines the compressed air module with the organic Rankine cycle module. The different working fluids (such as R600a, R152a, R134a, etc.) following it represent different organic working fluids used in the ORC module. The vertical axis includes round-trip efficiency (RTE) and exergy efficiency (EX). RTE represents the total energy conversion efficiency of the system, reflecting the ratio between input energy and output energy. The higher the RTE, the less loss the system has when storing and releasing energy, and the higher the energy utilization rate. EX represents the exergy efficiency of the system, reflecting the effective utilization of the available energy in the system. The higher the exergy efficiency, the greater the proportion of energy that can be effectively utilized in the system through the cogeneration or organic Rankine cycle (ORC) process. As can be seen from the figure, the RTE of using only the compressed air module is 62.04%, and when combined with the ORC module, the RTE is increased to 64.18%, indicating that the energy conversion efficiency of the overall system can be further improved after combining with the ORC module. After combining with the ORC module, different working fluids have different effects on RTE and EX. Among them, the RTE under R290 working fluid is the highest at 67.6%, followed by R717 working fluid (67.05%). This shows that R290 and R717 working fluids perform best in improving the energy conversion efficiency of the system. In terms of EX, the performance of each working fluid is relatively close, and the exergy efficiency of R717 and R290 is relatively high, at 52.4% and 52.3% respectively.

[0058] See also Figure 3 As shown, based on the same technical concept, the embodiment of the present application also provides a computer device 30, which can be Figure 1 In the trigeneration system shown, the computer device 30 may include a memory 301 and a processor 302 .

[0059] The so-called memory 301 is used to store computer programs executed by the processor 302. The memory 301 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function, etc.; the data storage area may store data created according to the use of the computer device, etc. The processor 302 may be a central processing unit (CPU), or a digital processing unit, etc. The specific connection medium between the above-mentioned memory 301 and the processor 302 is not limited in the embodiments of the present application. The embodiments of the present application are Figure 3 In the embodiment, the memory 301 and the processor 302 are connected via a bus 303. The bus 303 is connected to the processor 302 via a bus 303. Figure 3 The connection between other components is shown by bold lines, and is not intended to be limiting. The so-called bus 303 can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 3 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0060] The memory 301 may be a volatile memory, such as a random-access memory (RAM); the memory 301 may also be a non-volatile memory, such as a read-only memory, a flash memory, a hard disk drive (HDD) or a solid-state drive (SSD), or the memory 301 may be any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory 301 may be a combination of the above memories.

[0061] The processor 302 is used to execute the operation method of the trigeneration system executed by the device in each embodiment of the present application when calling the computer program stored in the so-called memory 301.

[0062] In some possible implementations, various aspects of the method for operating a trigeneration system provided in the present application may also be implemented in the form of a program product, which includes a program code. When the program product is run on a computer device, the program code is used to enable the computer device to execute the steps of the method for operating a trigeneration system according to various exemplary embodiments of the present application described above in this specification. For example, the computer device may execute the steps of each embodiment.

[0063] The program product may use any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of readable storage media (a non-exhaustive list) include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0064] The program product of the embodiment of the present application may adopt a portable compact disk read-only memory (CD-ROM) and include program code, and can be run on a computing device. However, the program product of the present application is not limited thereto. In the present application, the readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with a command execution system, device or device.

[0065] The readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, wherein the readable program code is carried. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. The readable signal medium may also be any readable medium other than a readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with a command execution system, apparatus, or device.

[0066] The program code embodied on the readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wired, optical cable, RF, etc., or any suitable combination of the foregoing.

[0067] Program code for performing the operations of the present application may be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, etc., and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user equipment, as a separate software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device via any type of network including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., via the Internet using an Internet service provider).

[0068] It should be noted that, although several units or subunits of the device are mentioned in the above detailed description, this division is merely exemplary and not mandatory. In fact, according to the embodiments of the present application, the features and functions of two or more units described above can be embodied in one unit. Conversely, the features and functions of one unit described above can be further divided into multiple units to be embodied.

[0069] In addition, although the operations of the method of the present application are described in a specific order in the drawings, this does not require or imply that the operations must be performed in this specific order, or that all the operations shown must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps.

[0070] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0071] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0072] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A trigeneration system, characterized in that: The system comprises: The compressed air module is used to compress the air from normal pressure to high pressure through a compressor during the system energy storage process and store it in the air storage cave to convert electrical energy into air internal energy; A natural gas power generation module is used to generate electricity by burning the high-pressure air released through the gas storage hole with external natural gas during the energy release process of the system, and to generate waste flue gas; an organic Rankine cycle module, for obtaining waste heat from the compressor through an intercooler and an aftercooler, obtaining first waste heat from the waste flue gas through a heat recovery device, and converting the first waste heat into additional electrical energy; The absorption refrigeration module is used to obtain the second waste heat of the waste flue gas and convert the second waste heat into cold energy.

2. The system according to claim 1, characterized in that The compressor is a multi-stage compressor composed of at least one low-pressure compressor and a plurality of high-pressure compressors, and the multi-stage compressor also includes an intercooler and an aftercooler.

3. The system according to claim 2, characterized in that The outlet of the multi-stage compressor is connected to the air storage cave, and the outlet of the air storage cave is connected to a pressure regulating valve, which is used to adjust the pressure of the air to supply air to the combustion chamber of the natural gas power generation unit.

4. The system according to claim 1, characterized in that The natural gas power generation unit also includes a combustion chamber, a gas turbine and a heat recovery device. The natural gas power generation unit is also used to preheat the high-pressure air through the heat recovery device in combination with the exhaust gas discharged from the gas turbine.

5. The system according to claim 1, wherein: The organic Rankine cycle module also includes a first circulation submodule and a second circulation submodule, the first circulation submodule and the second circulation submodule share a condenser, an expander and a pump, and the organic Rankine cycle module controls the working medium flow in the first circulation submodule and the second circulation submodule through multiple regulating valves.

6. The system according to claim 1, characterized in that The absorption refrigeration module also includes a desorber, a condenser, an evaporator, and an absorber. The desorber is used to perform heat exchange with the exhaust gas of the heat exchanger through the lithium bromide solution and transport the generated water vapor to the condenser; The condenser is used to condense the water vapor into liquid water and transport the liquid water to the evaporator through a throttle valve; The evaporator is used to evaporate liquid water at room temperature to generate cooling water and cold energy; The absorber is used to absorb the cooling water through the concentrated lithium bromide solution to generate a dilute lithium bromide solution.

7. A method for operating a trigeneration system, characterized in that: The method comprises: During the system energy storage process, the compressed air module compresses the air from normal pressure to high pressure through the compressor and stores it in the air storage cave to convert electrical energy into air internal energy; the organic Rankine cycle module obtains waste heat from the compressor through the intercooler and aftercooler; During the energy release process of the system, the natural gas power generation module generates electricity by burning the high-pressure air released by the gas storage hole with external natural gas, and produces waste flue gas; the organic Rankine cycle module obtains the first waste heat in the waste flue gas through a heat recovery device, and converts the first waste heat into additional electrical energy; the absorption refrigeration module obtains the second waste heat of the waste flue gas, and converts the second waste heat into cold energy.

8. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to claim 7 are implemented.

9. A computer storage medium having computer program instructions stored thereon, characterized in that: When the computer program instructions are executed by a processor, the steps of the method according to claim 7 are implemented.

10. A computer program product comprising computer program instructions, characterized in that When the computer program instructions are executed by a processor, the steps of the method according to claim 7 are implemented.

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