A compressor wet injection control method, device, equipment and storage medium

Abstract

The present application relates to the technical field of compressors, and discloses a method, device, equipment and storage medium for controlling wet injection of a compressor, the method comprising: calculating the specific entropy at the start point of the second compression stage according to the specific enthalpy of the saturated gas at the enthalpy increase port of the compressor and the intermediate pressure; calculating the specific enthalpy at the end point of the second compression stage under ideal isentropic compression according to the high pressure pressure at the exhaust port of the compressor and the specific entropy at the start point of the second compression stage; calculating the ideal exhaust temperature at the exhaust port of the compressor in the extreme wet injection state through the specific enthalpy at the end point of the second compression stage under ideal isentropic compression and the high pressure pressure at the exhaust port of the compressor; controlling the wet injection of the compressor according to the ideal exhaust temperature at the exhaust port of the compressor in the extreme wet injection state and the actual exhaust temperature at the exhaust port of the compressor. The above scheme controls the wet injection of the compressor by comparing the ideal exhaust temperature with the actual exhaust temperature, thereby ensuring the accuracy of the wet injection process of the compressor.

Description

Technical Field

[0001] The present application relates to the technical field of compressors, and in particular to a compressor wet injection control method, device, equipment and storage medium. Background Art

[0002] When an air source heat pump is used in conditions of low ambient temperature and high outlet water temperature, it is easy for the compressor to be damaged by liquid hammer and fail to work normally.

[0003] The main reason why the compressor is liquid-damaged is that the compressor compression ratio is too large under low ambient temperature and high outlet water temperature, resulting in high exhaust temperature. At this time, in order to ensure the reliability of the compressor, the air-injection and reheat-increasing circuit adopts the wet spray method to reduce the exhaust temperature and avoid overheating and damage inside the compressor. However, since the wet spray process of the air-injection and reheat-increasing circuit belongs to the gas-liquid two-phase state, insufficient liquid refrigerant will lead to poor exhaust temperature reduction effect, and excessive liquid refrigerant will cause the liquid refrigerant to be unable to be completely gasified after being sprayed into the compressor medium pressure chamber, resulting in liquid compression, so that the compressor is damaged by liquid shock. Summary of the invention

[0004] In view of this, the present application provides a compressor wet spray control method, device, computer equipment and storage medium to ensure the accuracy of the compressor wet spray process. The technical solution is as follows.

[0005] In a first aspect, a compressor wet injection control method is provided, the method comprising:

[0006] Obtaining the intermediate pressure of the compressor enthalpy increase port to calculate the saturated gas specific enthalpy of the compressor enthalpy increase port;

[0007] Calculating the specific entropy at the start point of the second compression stage according to the specific enthalpy of the saturated gas at the enthalpy increase port of the compressor and the intermediate pressure;

[0008] Obtain the high pressure at the compressor exhaust port;

[0009] Calculating the specific enthalpy at the end of the second compression stage under ideal isentropic compression according to the high pressure at the exhaust port of the compressor and the specific entropy at the start of the second compression stage;

[0010] The ideal exhaust temperature at the compressor exhaust port in the extreme wet injection state is calculated by using the specific enthalpy at the end point of the second compression stage under ideal isentropic compression and the high pressure at the compressor exhaust port;

[0011] The wet injection of the compressor is controlled according to the ideal exhaust temperature of the compressor exhaust port in the extreme wet injection state and the actual exhaust temperature of the compressor exhaust port.

[0012] In a possible implementation, the calculation of the ideal exhaust temperature at the exhaust port of the compressor in the limit wet injection state by using the specific enthalpy at the end point of the second compression stage under ideal isentropic compression and the high pressure at the exhaust port of the compressor includes:

[0013] The specific enthalpy at the end of the second compression stage of the actual compression process is calculated by the specific enthalpy at the end of the second compression stage under ideal isentropic compression, the specific enthalpy of the saturated gas at the enthalpy increase port of the compressor, and the isentropic efficiency value of the compressor;

[0014] According to the specific enthalpy at the end point of the second compression stage of the actual compression process and the high pressure at the exhaust port of the compressor, the ideal exhaust temperature at the exhaust port of the compressor in the extreme wetting state is calculated.

[0015] In a possible implementation, the specific enthalpy at the end point of the second compression stage of the actual compression process is calculated by using the specific enthalpy at the end point of the second compression stage under ideal isentropic compression, the specific enthalpy of the saturated gas at the enthalpy increasing port of the compressor, and the isentropic efficiency value of the compressor, including:

[0016]

[0017] Among them, h2` is the specific enthalpy at the end point of the second compression stage under ideal isentropic compression, h9 is the specific enthalpy of the saturated gas at the enthalpy increase port of the compressor, η is the isentropic efficiency value of the compressor, and the isentropic efficiency value is preset, and h2 is the specific enthalpy at the end point of the second compression stage of the actual compression process.

[0018] In a possible implementation, the controlling of the wet injection of the compressor according to the ideal exhaust temperature and the actual exhaust temperature at the exhaust port of the compressor in the extreme wet injection state includes:

[0019] If the ideal exhaust temperature is greater than the actual exhaust temperature, and the temperature difference between the ideal exhaust temperature and the actual exhaust temperature is greater than or equal to a first threshold, the electronic expansion valve of the compressor is controlled to enter a free adjustment state.

[0020] In a possible implementation, the controlling of the wet injection of the compressor according to the ideal exhaust temperature and the actual exhaust temperature at the exhaust port of the compressor in the extreme wet injection state includes:

[0021] If the ideal exhaust temperature is greater than the actual exhaust temperature, and the temperature difference between the ideal exhaust temperature and the actual exhaust temperature is less than a first threshold and greater than or equal to a second threshold, a first control instruction is sent to the expansion valve to prohibit the expansion valve from opening further.

[0022] In a possible implementation, the controlling of the wet injection of the compressor according to the ideal exhaust temperature and the actual exhaust temperature at the exhaust port of the compressor in the extreme wet injection state includes:

[0023] If the ideal exhaust temperature is greater than or equal to the actual exhaust temperature, and the temperature difference between the ideal exhaust temperature and the actual exhaust temperature is less than a second threshold, a second control instruction is sent to the expansion valve to reduce the expansion valve at a first speed until the ideal exhaust temperature is greater than the actual exhaust temperature, and the temperature difference between the ideal exhaust temperature and the actual exhaust temperature is greater than or equal to the first threshold.

[0024] In a possible implementation, the method further includes:

[0025] If the ideal exhaust temperature is lower than the actual exhaust temperature, a third control instruction is sent to the expansion valve to reduce the expansion valve at a second speed until the ideal exhaust temperature is higher than the actual exhaust temperature, and the temperature difference between the ideal exhaust temperature and the actual exhaust temperature is greater than or equal to a first threshold; the second speed is higher than the first speed.

[0026] In a second aspect, a compressor wet injection control device is provided, the device being arranged in a controller, the device comprising:

[0027] An intermediate pressure acquisition module, used for acquiring the intermediate pressure of the compressor enthalpy increase port to calculate the saturated gas specific enthalpy of the compressor enthalpy increase port;

[0028] a specific entropy calculation module, used to calculate the specific entropy at the starting point of the second compression stage according to the specific enthalpy of the saturated gas at the enthalpy increase port of the compressor and the intermediate pressure;

[0029] A high-pressure acquisition module, used to acquire the high-pressure pressure at the exhaust port of the compressor;

[0030] a specific enthalpy calculation module, configured to calculate the specific enthalpy at the end point of the second compression stage under ideal isentropic compression according to the high pressure at the exhaust port of the compressor and the specific entropy at the start point of the second compression stage;

[0031] An ideal exhaust temperature calculation module is used to calculate the ideal exhaust temperature at the exhaust port of the compressor in the extreme wet injection state by using the specific enthalpy at the end point of the second compression stage under ideal isentropic compression and the high pressure at the exhaust port of the compressor;

[0032] The control module is used to control the wet injection of the compressor according to the ideal exhaust temperature of the compressor exhaust port in the extreme wet injection state and the actual exhaust temperature of the compressor exhaust port.

[0033] In a third aspect, a computer device is provided, comprising a processor and a memory, wherein the memory stores at least one instruction, and the at least one instruction is loaded and executed by the processor to implement the above-mentioned compressor wet injection control method.

[0034] In a fourth aspect, a computer-readable storage medium is provided, wherein at least one instruction is stored in the storage medium, and the at least one instruction is loaded and executed by a processor to implement the above-mentioned compressor wet injection control method.

[0035] In a fifth aspect, a computer program product or a computer program is provided, wherein the computer program product or the computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device performs a compressor wet injection control method.

[0036] The technical solution provided by this application may have the following beneficial effects:

[0037] During the operation of the compressor, the controller can obtain the intermediate pressure of the compressor enthalpy increase port to calculate the saturated gas specific enthalpy of the compressor enthalpy increase port, and then calculate the specific entropy at the starting point of the second compression stage according to the saturated gas specific enthalpy and the intermediate pressure at the compressor enthalpy increase port. At this time, according to the high pressure pressure at the compressor exhaust port and the specific entropy at the starting point of the second compression stage, the specific enthalpy at the end point of the second compression stage under ideal isentropic compression can be calculated; the ideal exhaust temperature of the compressor exhaust port in the extreme wet injection state can be calculated through the specific enthalpy at the end point of the second compression stage under ideal isentropic compression and the high pressure pressure at the compressor exhaust port. Therefore, by comparing the ideal exhaust temperature with the actual exhaust temperature, the wet injection of the compressor can be controlled, which can not only ensure that the unit compressor can reduce the effective exhaust temperature through wet injection, but also accurately lock the safety threshold of the exhaust temperature and take corresponding actions in advance to protect the unit from being damaged by liquid hammer, thereby ensuring the accuracy of the compressor wet injection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 It is a structural schematic diagram of a compressor control system according to an exemplary embodiment.

[0040] Figure 2 The present invention is a method flow chart of a compressor wet injection control method according to an exemplary embodiment.

[0041] Figure 3It is a structural schematic diagram of a compressor wet spray control device provided in an embodiment of the present application.

[0042] Figure 4 It is a structural diagram of a computer device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application.

[0044] In the description of the embodiments of the present application, the term "corresponding" may indicate a direct or indirect correspondence between two items, or an association relationship between the two items, or a relationship between indication and being indicated, configuration and being configured, and the like.

[0045] Figure 1 FIG. 1 is a schematic diagram showing a compressor control system according to an exemplary embodiment. Figure 1 As shown, the compressor control system includes a compressor 1, a high-pressure pressure sensor 2, an exhaust temperature sensor 3, a condenser 4, a condensation temperature sensor 5, an economizer 6, an auxiliary road inlet temperature 7, an auxiliary road outlet temperature sensor 8, an electronic pressure sensor 9, an electronic expansion valve 10, a main road outlet sensor 11, a main expansion valve 12, an evaporator 13, a fan assembly 14, an intake temperature sensor 15, and an intake temperature sensor 16.

[0046] The high-temperature, high-pressure refrigerant gas discharged from the compressor 1 becomes liquid after transferring heat to the heat-carrying medium through the condenser 4. The high-pressure refrigerant liquid coming out of the condenser is divided into two paths. The refrigerant liquid in the main path directly enters the economizer 6, and the refrigerant liquid in the auxiliary path is throttled and reduced in pressure by the electronic expansion valve 10, and then becomes a gas-liquid mixture and also enters the economizer 6. The two generate heat exchange in the economizer. The refrigerant liquid in the auxiliary path absorbs heat and becomes gas, and is then sucked into the auxiliary air inlet of the compressor 1. The refrigerant in the main path releases heat and becomes a supercooled liquid, and then enters the evaporator through the throttling and pressure reduction of the main expansion valve 12.

[0047] In a large number of practices, air source heat pumps are prone to compressor damage by liquid hammer and cannot work normally when used in low ambient temperature and high outlet water temperature. This is because under low ambient temperature and high outlet water temperature, the compression ratio of the compressor is too large, resulting in a high exhaust temperature. At this time, in order to ensure the reliability of the compressor, the air replenishment and reheat increase circuit adopts a wet spray method to reduce the exhaust temperature and avoid overheating and damage inside the compressor. However, since the air replenishment and reheat increase circuit belongs to a gas-liquid two-phase state during the wet spray process, insufficient liquid refrigerant will lead to poor exhaust temperature reduction effect, while excessive liquid refrigerant will cause the liquid refrigerant to be unable to be completely vaporized after being sprayed into the compressor medium pressure chamber, resulting in liquid compression and thus causing the compressor to be damaged by liquid hammer.

[0048] Therefore, in order to solve the above problems, the present application provides a compressor wet injection control method to ensure the accuracy of wet injection during the operation of the compressor. Figure 2 is a method flow chart of a compressor wet injection control method according to an exemplary embodiment, the method is executed by a computer device, and the computer device may be as follows Figure 1 The controller in the system shown. Figure 2 As shown, the compressor wet injection control method may include the following steps:

[0049] Step 201, obtaining the intermediate pressure of the enthalpy increasing port of the compressor to calculate the saturated gas specific enthalpy of the enthalpy increasing port of the compressor.

[0050] In the embodiment of the present application, the controller can Figure 1 The electronic pressure sensor 9 on the compressor control system shown acquires the intermediate pressure P1 of the compressor enthalpy increasing port, and thereby determines the saturated gas specific enthalpy of the compressor enthalpy increasing port based on the intermediate pressure P1 of the compressor enthalpy increasing port.

[0051] Optionally, the saturated gas specific enthalpy of the enthalpy increase port of the compressor is related to the type of refrigerant used in the compressor. Therefore, after obtaining the intermediate pressure P1 of the enthalpy increase port of the compressor, the saturated gas specific enthalpy of the enthalpy increase port of the compressor can be read from the table according to the value of P1, or calculated by software according to a specified operation method.

[0052] Step 202: Calculate the specific entropy at the start point of the second compression stage according to the specific enthalpy of the saturated gas at the enthalpy increase port of the compressor and the intermediate pressure.

[0053] The principle of wet spray exhaust is that the liquid refrigerant in the auxiliary circuit enters the medium-pressure chamber of the compressor through the compressor enthalpy increase port and evaporates and vaporizes at the moment it absorbs the energy of the superheated gaseous refrigerant at the end of the first compression stage of the compressor, thereby reducing the starting temperature of the second compression stage, and then reducing the temperature at the end of the second compression stage, that is, the exhaust temperature.

[0054] The limit of wet spraying is that the liquid refrigerant in the auxiliary circuit evaporates and absorbs heat at the moment it enters the compressor at the enthalpy increase port, and completely becomes a saturated gaseous refrigerant. At the same time, the superheated gaseous refrigerant at the end of the first compression stage also releases heat and becomes a saturated gaseous refrigerant. On this basis, no matter how much liquid refrigerant there is in the auxiliary circuit, it will not be able to evaporate into a gas, causing the compressor to produce liquid compression in the second compression stage, thereby reducing the service life of the compressor and even causing liquid hammer damage.

[0055] Based on this, the specific enthalpy at the beginning of the second compression stage is defined as h1, and it can be concluded that the specific enthalpy at the beginning of the second compression stage under the limit wet spray state is h1=h9;

[0056] At this time, the controller can calculate the specific entropy S1 at the starting point of the second compression stage through the specific enthalpy h1 at the starting point of the second compression stage and the intermediate pressure P1 through the software.

[0057] Specifically, for an ideal gas, the specific enthalpy h can be expressed by the following formula:

[0058]

[0059] in is the specific heat at constant pressure, is the absolute temperature.

[0060] The specific entropy s of an ideal gas can be expressed as:

[0061]

[0062] where R is the gas constant, and is the reference temperature and pressure.

[0063] Through the above formula and the ideal gas equation, the specific entropy S1 at the starting point of the second compression stage can be calculated based on the specific enthalpy h1 at the starting point of the second compression stage and the intermediate pressure P1. The ideal compression process is isentropic compression, that is, the theoretical specific entropy S2 at the compressor exhaust port = S1.

[0064] Step 203, obtaining the high pressure at the compressor exhaust port.

[0065] In the embodiment of the present application, the controller can Figure 1 The high-pressure pressure sensor 2 on the compressor control system shown obtains the high-pressure pressure P2 at the compressor exhaust port.

[0066] Step 204, calculating the specific enthalpy at the end point of the second compression stage under ideal isentropic compression according to the high pressure at the exhaust port of the compressor and the specific entropy at the start point of the second compression stage;

[0067] By using the formula shown in step 202, the specific enthalpy at the end point of the second compression stage under ideal isentropic compression can be reversely calculated based on the high pressure at the compressor exhaust port and the specific entropy at the start point of the second compression stage.

[0068] Step 205, calculating the ideal exhaust temperature at the exhaust port of the compressor in the extreme wet injection state by using the specific enthalpy at the end point of the second compression stage under ideal isentropic compression and the high pressure at the exhaust port of the compressor.

[0069] Optionally, the specific enthalpy at the end point of the second compression stage of the actual compression process is calculated by the specific enthalpy at the end point of the second compression stage under ideal isentropic compression, the specific enthalpy of the saturated gas at the enthalpy increase port of the compressor, and the isentropic efficiency value of the compressor.

[0070] According to the specific enthalpy at the end point of the second compression stage of the actual compression process and the high pressure at the exhaust port of the compressor, the ideal exhaust temperature at the exhaust port of the compressor in the extreme wetting state is calculated.

[0071] In a possible implementation, the specific enthalpy at the end point of the second compression stage of the actual compression process is calculated by using the specific enthalpy at the end point of the second compression stage under ideal isentropic compression, the specific enthalpy of the saturated gas at the enthalpy increasing port of the compressor, and the isentropic efficiency value of the compressor, including:

[0072]

[0073] Among them, h2` is the specific enthalpy at the end point of the second compression stage under ideal isentropic compression, h9 is the specific enthalpy of the saturated gas at the enthalpy increase port of the compressor, η is the isentropic efficiency value of the compressor, and the isentropic efficiency value is preset, and h2 is the specific enthalpy at the end point of the second compression stage of the actual compression process.

[0074] Step 206: Control the wet injection of the compressor according to the ideal exhaust temperature at the exhaust port of the compressor in the extreme wet injection state and the actual exhaust temperature at the exhaust port of the compressor.

[0075] Optionally, if the ideal exhaust temperature is greater than the actual exhaust temperature, and the temperature difference between the ideal exhaust temperature and the actual exhaust temperature is greater than or equal to a first threshold, the electronic expansion valve of the compressor is controlled to enter a free adjustment state.

[0076] For example, when T2≥T2'+4, the system is judged to be risk-free and the expansion valve enters a free adjustment state.

[0077] Optionally, if the ideal exhaust temperature is greater than the actual exhaust temperature, and the temperature difference between the ideal exhaust temperature and the actual exhaust temperature is less than a first threshold and greater than or equal to a second threshold, a first control instruction is sent to the expansion valve to prohibit the expansion valve from opening.

[0078] For example, when T2′+2≤T2<T2′+4, it is determined that there is a risk of liquid compression in the system, and the controller will send a command to the electronic expansion valve 10 to prohibit the electronic expansion valve 10 from opening further.

[0079] Optionally, if the ideal exhaust temperature is greater than or equal to the actual exhaust temperature, and the temperature difference between the ideal exhaust temperature and the actual exhaust temperature is less than a second threshold, a second control instruction is sent to the expansion valve to reduce the expansion valve at a first speed until the ideal exhaust temperature is greater than the actual exhaust temperature, and the temperature difference between the ideal exhaust temperature and the actual exhaust temperature is greater than or equal to the first threshold.

[0080] For example, when T2'≤T2<T2'+2, it is determined that the system is about to enter the liquid compression state, and the controller will send a command to the electronic expansion valve 10 to force the electronic expansion valve 10 to close, gradually reduce the wet injection volume of the auxiliary circuit, and increase the exhaust temperature until T2≥T2'+4, and then exit the forced closing control.

[0081] Optionally, if the ideal exhaust temperature is lower than the actual exhaust temperature, a third control instruction is sent to the expansion valve to reduce the expansion valve at a second speed until the ideal exhaust temperature is higher than the actual exhaust temperature, and the temperature difference between the ideal exhaust temperature and the actual exhaust temperature is greater than or equal to a first threshold; and the second speed is higher than the first speed.

[0082] For example, when T2<T2', it is determined that the system has entered the liquid compression state, and the controller will send a command to the electronic expansion valve 10 to force the electronic expansion valve 10 to close quickly, quickly reduce the wet spray volume of the auxiliary road, and increase the exhaust temperature until T2≥T2'+4, and then exit the forced rapid closing control.

[0083] In summary, during the operation of the compressor, the controller can obtain the intermediate pressure of the compressor enthalpy increase port to calculate the saturated gas specific enthalpy of the compressor enthalpy increase port, and then calculate the specific entropy at the starting point of the second compression stage according to the saturated gas specific enthalpy and the intermediate pressure at the compressor enthalpy increase port. At this time, according to the high pressure pressure at the compressor exhaust port and the specific entropy at the starting point of the second compression stage, the specific enthalpy at the end point of the second compression stage under ideal isentropic compression can be calculated; the ideal exhaust temperature of the compressor exhaust port in the extreme wet injection state can be calculated through the specific enthalpy at the end point of the second compression stage under ideal isentropic compression and the high pressure pressure at the compressor exhaust port. Therefore, by comparing the ideal exhaust temperature with the actual exhaust temperature, the wet injection of the compressor can be controlled, which can not only ensure that the unit compressor can reduce the effective exhaust temperature through wet injection, but also accurately lock the safety threshold of the exhaust temperature and take corresponding actions in advance to protect the unit from being damaged by liquid hammer, thereby ensuring the accuracy of the compressor wet injection process.

[0084] In the embodiments of the present application, a compressor wet injection control device is also provided, which is used to implement the above embodiments and preferred implementations, and will not be repeated here. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0085] The present application embodiment provides a compressor wet spray control device, Figure 3 : is a schematic diagram of the structure of a compressor wet spray control device provided in an embodiment of the present application, wherein the device is arranged in a controller, and the device comprises:

[0086] The intermediate pressure acquisition module 301 is used to acquire the intermediate pressure of the compressor enthalpy increase port to calculate the saturated gas specific enthalpy of the compressor enthalpy increase port;

[0087] The specific entropy calculation module 302 is used to calculate the specific entropy at the start point of the second compression stage according to the specific enthalpy of the saturated gas at the enthalpy increase port of the compressor and the intermediate pressure;

[0088] A high pressure acquisition module 303 is used to acquire the high pressure at the exhaust port of the compressor;

[0089] a specific enthalpy calculation module 304, configured to calculate the specific enthalpy at the end point of the second compression stage under ideal isentropic compression according to the high pressure at the exhaust port of the compressor and the specific entropy at the start point of the second compression stage;

[0090] The ideal exhaust temperature calculation module 305 is used to calculate the ideal exhaust temperature at the exhaust port of the compressor in the extreme wet injection state by using the specific enthalpy at the end point of the second compression stage under the ideal isentropic compression and the high pressure at the exhaust port of the compressor;

[0091] The control module 306 is used to control the wet injection of the compressor according to the ideal exhaust temperature of the compressor exhaust port and the actual exhaust temperature of the compressor exhaust port in the extreme wet injection state.

[0092] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0093] The compressor wet injection control device in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0094] The present application also provides a computer device having the above Figure 3 Compressor wet injection control device shown.

[0095] See also Figure 4 , Figure 4 is a schematic diagram of the structure of a computer device provided in an embodiment of the present application, such as Figure 4 As shown, the computer device includes: one or more processors 100, a memory 200, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. The various components are connected to each other using different buses for communication, and can be installed on a common mainboard or installed in other ways as needed. The processor can process instructions executed in the computer device, including instructions stored in or on the memory to display graphic information in a graphical user interface on an external input / output device (such as a display device coupled to an interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 4 A processor 100 is taken as an example.

[0096] The processor 100 may be a central processing unit, a network processor or a combination thereof. The processor 100 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable logic gate array, a general purpose array logic or any combination thereof.

[0097] The memory 200 stores instructions executable by at least one processor 100, so that the at least one processor 100 executes the method shown in the above embodiment.

[0098] The memory 200 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required by at least one function; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory 200 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 200 may optionally include a memory remotely arranged relative to the processor 100, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0099] The memory 200 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 200 may also include a combination of the above types of memory.

[0100] The computer device further comprises a communication interface 30 for the computer device to communicate with other devices or a communication network.

[0101] The embodiment of the present application also provides a computer-readable storage medium. The above method according to the embodiment of the present application can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0102] Part of the present application may be applied as a computer program product, such as a computer program instruction, which, when executed by a computer, can call or provide the method and / or technical solution according to the present application through the operation of the computer. Those skilled in the art should understand that the existence of computer program instructions in computer-readable media includes but is not limited to source files, executable files, installation package files, etc., and accordingly, the way in which computer program instructions are executed by a computer includes but is not limited to: the computer directly executes the instruction, or the computer compiles the instruction and then executes the corresponding compiled program, or the computer reads and executes the instruction, or the computer reads and installs the instruction and then executes the corresponding installed program. Here, the computer-readable medium can be any available computer-readable storage medium or communication medium accessible to the computer.

[0103] Although the embodiments of the present application are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A compressor wet injection control method, characterized in that: The method is executed by a controller, and comprises: Obtaining the intermediate pressure of the compressor enthalpy increase port to calculate the saturated gas specific enthalpy of the compressor enthalpy increase port; Calculate the specific entropy at the start of the second compression stage based on the specific enthalpy of the saturated gas at the enthalpy increase port of the compressor and the intermediate pressure; Obtain the high pressure at the compressor exhaust port; Calculating the specific enthalpy at the end of the second compression stage under ideal isentropic compression according to the high pressure at the exhaust port of the compressor and the specific entropy at the start of the second compression stage; The ideal exhaust temperature at the compressor exhaust port in the extreme wet injection state is calculated by using the specific enthalpy at the end point of the second compression stage under ideal isentropic compression and the high pressure at the compressor exhaust port; Controlling the wet spraying of the compressor according to the ideal exhaust temperature of the exhaust port of the compressor in the extreme wet spraying state and the actual exhaust temperature of the exhaust port of the compressor; The step of calculating the specific entropy at the start point of the second compression stage according to the specific enthalpy of the saturated gas at the enthalpy increase port of the compressor and the intermediate pressure comprises: The specific entropy at the starting point of the second compression stage is calculated according to the specific enthalpy at the starting point of the second compression stage and the intermediate pressure; and the specific enthalpy at the starting point of the second compression stage under the limit wet spray state is equal to the specific enthalpy of the saturated gas at the enthalpy increase port of the compressor.

2. The method according to claim 1, characterized in that The method of calculating the ideal exhaust temperature at the exhaust port of the compressor in the limit wet injection state by using the specific enthalpy at the end point of the second compression stage under ideal isentropic compression and the high pressure at the exhaust port of the compressor comprises: The specific enthalpy at the end of the second compression stage of the actual compression process is calculated by the specific enthalpy at the end of the second compression stage under ideal isentropic compression, the specific enthalpy of the saturated gas at the enthalpy increase port of the compressor, and the isentropic efficiency value of the compressor; The ideal exhaust gas temperature at the compressor exhaust port in the extreme wetting state is calculated according to the specific enthalpy at the end point of the second compression stage of the actual compression process and the high pressure at the compressor exhaust port.

3. The method according to claim 2, characterized in that The specific enthalpy at the end point of the second compression stage of the actual compression process is calculated by using the specific enthalpy at the end point of the second compression stage under ideal isentropic compression, the specific enthalpy of the saturated gas at the enthalpy increasing port of the compressor, and the isentropic efficiency value of the compressor, including: Among them, h2` is the specific enthalpy at the end point of the second compression stage under ideal isentropic compression, h9 is the specific enthalpy of the saturated gas at the enthalpy increase port of the compressor, η is the isentropic efficiency value of the compressor, and the isentropic efficiency value is preset, and h2 is the specific enthalpy at the end point of the second compression stage of the actual compression process.

4. The method according to any one of claims 1 to 3, characterized in that: The controlling of the wet spraying of the compressor according to the ideal exhaust temperature and the actual exhaust temperature of the exhaust port of the compressor in the extreme wet spraying state includes: If the ideal exhaust temperature is greater than the actual exhaust temperature, and the temperature difference between the ideal exhaust temperature and the actual exhaust temperature is greater than or equal to a first threshold, the electronic expansion valve of the compressor is controlled to enter a free adjustment state.

5. The method according to any one of claims 1 to 3, characterized in that: The controlling of the wet spraying of the compressor according to the ideal exhaust temperature and the actual exhaust temperature of the exhaust port of the compressor in the extreme wet spraying state includes: If the ideal exhaust temperature is greater than the actual exhaust temperature, and the temperature difference between the ideal exhaust temperature and the actual exhaust temperature is less than a first threshold and greater than or equal to a second threshold, a first control instruction is sent to the expansion valve to prohibit the expansion valve from opening further.

6. The method according to any one of claims 1 to 3, characterized in that: The controlling of the wet spraying of the compressor according to the ideal exhaust temperature and the actual exhaust temperature of the exhaust port of the compressor in the extreme wet spraying state includes: If the ideal exhaust temperature is greater than or equal to the actual exhaust temperature, and the temperature difference between the ideal exhaust temperature and the actual exhaust temperature is less than a second threshold, a second control instruction is sent to the expansion valve to reduce the expansion valve at a first speed until the ideal exhaust temperature is greater than the actual exhaust temperature, and the temperature difference between the ideal exhaust temperature and the actual exhaust temperature is greater than or equal to the first threshold.

7. The method according to claim 6, characterized in that The method further comprises: If the ideal exhaust temperature is lower than the actual exhaust temperature, a third control instruction is sent to the expansion valve to reduce the expansion valve at a second speed until the ideal exhaust temperature is higher than the actual exhaust temperature, and the temperature difference between the ideal exhaust temperature and the actual exhaust temperature is greater than or equal to a first threshold; the second speed is higher than the first speed.

8. A compressor wet spray control device, characterized in that: The device is arranged in a controller, and the device comprises: An intermediate pressure acquisition module, used for acquiring the intermediate pressure of the compressor enthalpy increase port to calculate the saturated gas specific enthalpy of the compressor enthalpy increase port; A specific entropy calculation module, used to calculate the specific entropy at the start point of the second compression stage according to the specific enthalpy of the saturated gas at the enthalpy increase port of the compressor and the intermediate pressure; A high-pressure acquisition module, used to acquire the high-pressure pressure at the exhaust port of the compressor; a specific enthalpy calculation module, configured to calculate the specific enthalpy at the end point of the second compression stage under ideal isentropic compression according to the high pressure at the exhaust port of the compressor and the specific entropy at the start point of the second compression stage; An ideal exhaust temperature calculation module is used to calculate the ideal exhaust temperature at the exhaust port of the compressor in the extreme wet injection state by using the specific enthalpy at the end point of the second compression stage under ideal isentropic compression and the high pressure at the exhaust port of the compressor; A control module, used for controlling the wet spraying of the compressor according to the ideal exhaust temperature of the exhaust port of the compressor in the extreme wet spraying state and the actual exhaust temperature of the exhaust port of the compressor; The specific entropy calculation module is used for: The specific entropy at the starting point of the second compression stage is calculated according to the specific enthalpy at the starting point of the second compression stage and the intermediate pressure; and the specific enthalpy at the starting point of the second compression stage under the limit wet spray state is equal to the specific enthalpy of the saturated gas at the enthalpy increase port of the compressor.

9. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the compressor wet injection control method according to any one of claims 1 to 7 by executing the computer instructions.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the compressor wet injection control method according to any one of claims 1 to 7.

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