Open rack vaporizer heat transfer performance mechanism modeling method, device, medium and equipment

Abstract

The invention relates to an open rack gasifier heat transfer performance mechanism modeling method, device, medium and equipment, and the method comprises the steps: building an open rack gasifier heat transfer performance mechanism model according to the operation principle, structure size and key operation parameters of an open rack gasifier; the method comprises the following steps: acquiring historical operation data of the open-rack vaporizer from an LNG receiving station on site, and preprocessing the data to obtain preprocessed data; optimizing a heat transfer performance mechanism model of the open rack gasifier by adopting a mathematical method according to the preprocessed data; and calculating the heat transfer performance of the gasifier under different working conditions by using the optimized heat transfer performance mechanism model of the open-rack gasifier, and determining an operation optimization scheme of the gasification unit of the LNG receiving station. The heat transfer performance mechanism model of the open rack gasifier is based on an equipment operation mechanism, and the stability and the epitaxy of a calculation result are more reliable.

Description

Technical Field

[0001] The invention relates to a method, device, medium and equipment for modeling the heat transfer performance mechanism of an open-frame gasifier, and belongs to the technical field of liquefied natural gas. Background Art

[0002] With the continuous increase in domestic demand for energy, the rapidly developing liquefied natural gas receiving stations receive and unload a large amount of imported liquefied natural gas every year, effectively reducing my country's dependence on traditional energy sources such as oil and coal. The gasification unit is an important part of the LNG (liquefied natural gas, Liquefied Natural Gas, hereinafter referred to as LNG) receiving station. Its function is to gasify liquefied natural gas to meet the requirements of pipeline transmission. It mainly includes a gasifier and a seawater pump, and the main energy consumption is the power consumption of the seawater pump. Under a large NG (natural gas, hereinafter referred to as NG) transmission volume, the energy consumption of the seawater pump accounts for a high proportion of the total energy consumption of the LNG receiving station. In areas with good seawater quality and high temperature, open-rack vaporizers (ORV) with compact structure, relatively low initial investment and operation and maintenance costs are usually preferred. According to the design requirements of the open-rack vaporizer on site, the seawater pump is kept in high flow operation under the design conditions all year round. When the seawater inlet temperature is 10~30℃, the corresponding seawater inlet and outlet temperature difference is much smaller than the 5℃ required by the process specification, and the thermal energy is not fully utilized. The abundant seawater flow increases the power consumption and gasification operation cost. To achieve energy conservation and consumption reduction, it is necessary to understand the actual operating performance of the on-site open-frame gasifier under different operating conditions based on historical operating data, and to predict the gasification capacity under corresponding low seawater flow rates.

[0003] There are occasional operating data at low seawater flow rates on site, but they lack systematicity and the operating time is generally short, which cannot provide data on the gasification capacity, energy consumption and economy of each open-frame gasifier under multi-condition and variable seawater flow rates over a long period of time. If you want to systematically master the operating performance of the open-frame gasifier, you need to select a suitable empirical formula for the convective heat transfer coefficient based on the operating mechanism of the open-frame gasifier, establish a heat transfer mechanism model for the open-frame gasifier, and optimize the model accuracy through the historical operating data of the receiving station. Then, based on the model, predict the minimum amount of seawater required for the open-frame gasifier when the seawater inlet temperature is 10~30℃, so as to effectively guide the optimal matching operation of the on-site seawater pump and ORV to meet production requirements and energy-saving expectations. The work of developing a heat transfer mechanism model for open-frame gasifiers combined with historical operating data is still in the exploratory stage. Summary of the invention

[0004] In view of the above technical problems, the present invention provides a method, device, medium and equipment for modeling the heat transfer performance mechanism of an open-rack vaporizer. The method is based on the actual operating performance of the equipment. By establishing a heat transfer performance mechanism model of the open-rack vaporizer based on historical operating data, the minimum seawater flow rate required for the open-rack vaporizer to complete the gasification task under different operating conditions is determined, and the required seawater flow rate is provided for optimizing the start and stop plan of the seawater pump, so as to achieve energy saving and consumption reduction of the gasification unit of the LNG receiving station.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A heat transfer performance mechanism modeling method for an open-frame gasifier includes: According to the operating principle, structural dimensions and key operating parameters of the open-frame gasifier, a heat transfer performance mechanism model of the open-frame gasifier is established; Obtain historical operating data of the open-rack vaporizer from the LNG receiving station site, pre-process the data, and obtain pre-processed data; Based on the preprocessed data, the mathematical method is used to optimize the heat transfer performance mechanism model of the open rack gasifier; The optimized open-rack vaporizer heat transfer performance mechanism model is used to calculate the heat transfer performance of the vaporizer under different operating conditions, and the operation optimization scheme of the vaporization unit of the LNG receiving station is determined.

[0006] In the open-frame gasifier heat transfer performance mechanism modeling method, preferably, key operating parameters include LNG inlet temperature, pressure and flow rate, and seawater inlet pressure, temperature, salinity and flow rate operating parameters.

[0007] The open-frame gasifier heat transfer performance mechanism modeling method, preferably, the open-frame gasifier heat transfer performance mechanism model, is a total thermal resistance model of the open-frame gasifier heat transfer in the form of thermal resistance, which includes the convective heat transfer thermal resistance and scale resistance on the hot fluid side, i.e., the seawater side, and the convective heat transfer thermal resistance and scale resistance on the cold fluid side, i.e., the LNG side, as well as the thermal conductivity thermal resistance model of the heat exchange wall between the hot and cold fluids.

[0008] In the open-rack gasifier heat transfer performance mechanism modeling method, preferably, the open-rack gasifier historical operating data includes LNG composition, inlet temperature, pressure and flow, outlet NG temperature and pressure, seawater inlet pressure, temperature and flow, and seawater outlet temperature operating parameters.

[0009] The open-frame gasifier heat transfer performance mechanism modeling method preferably preprocesses the data, including supplementing, cleaning, standardizing and dividing the working conditions of the data.

[0010] The method for modeling the heat transfer performance mechanism of an open-frame gasifier, preferably, the mathematical method comprises a genetic algorithm or a particle swarm algorithm; Optimize the heat transfer performance mechanism model of the open-frame gasifier, including the total thermal resistance model or the seawater side convective heat transfer resistance, seawater scale resistance, LNG side convective heat transfer resistance, LNG side scale resistance and the heat conduction thermal resistance model of the heat exchange wall between the cold and hot fluids in the heat transfer performance mechanism model of the open-frame gasifier.

[0011] The open-rack vaporizer heat transfer performance mechanism modeling method preferably determines the operation optimization plan of the vaporization unit of the LNG receiving station, including the following steps: substituting the operating parameters including the LNG receiving station NG output, the open-rack vaporizer LNG inlet parameters, and the seawater inlet temperature and the field operation specification conditions into the optimized open-rack vaporizer heat transfer performance mechanism model to obtain the minimum seawater flow required for the open-rack vaporizer under the corresponding operating state, thereby determining the seawater flow distribution and seawater pump start-stop plan for each open-rack vaporizer of the vaporization unit to achieve energy saving and consumption reduction.

[0012] A second aspect of the present invention provides an open-frame gasifier heat transfer performance mechanism modeling device, comprising: The first processing unit is used to establish a heat transfer performance mechanism model of the open-frame gasifier according to the operating principle, structural dimensions and key operating parameters of the open-frame gasifier; The second processing unit is used to obtain historical operation data of the open rack gasifier from the LNG receiving station site, pre-process the data, and obtain pre-processed data; A third processing unit is used to optimize the heat transfer performance mechanism model of the open rack gasifier by using a mathematical method according to the preprocessing data; The fourth processing unit is used to calculate the heat transfer performance of the vaporizer under different working conditions by using the optimized open-rack vaporizer heat transfer performance mechanism model, and determine the operation optimization plan of the vaporization unit of the LNG receiving station.

[0013] A third aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the computer program implements the steps of any one of the above-mentioned methods for modeling the heat transfer performance mechanism of an open-rack gasifier.

[0014] A fourth aspect of the present invention provides a computer device, comprising 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, the steps of any one of the above-mentioned methods for modeling the heat transfer performance mechanism of an open-frame gasifier are implemented.

[0015] The present invention adopts the above technical solution, which has the following advantages: 1. The heat transfer performance mechanism model of the open-frame gasifier constructed in the present invention is based on the equipment operation mechanism, and the stability and extension of the calculation results are more reliable.

[0016] 2. The basic structure of the open-rack vaporizer heat transfer performance mechanism model is a general model. For open-rack vaporizers with similar heat transfer performance, no historical operating data is required. Only key structural dimensions and open-rack vaporizer inlet operating parameters need to be input to calculate the heat transfer performance of the open-rack heat exchanger. This is conducive to systematically mastering the heat transfer performance of the open-rack vaporizer under different working conditions.

[0017] 3. Integrate historical data, use advanced optimization algorithms, optimize the open-frame vaporizer heat transfer performance mechanism model, improve model accuracy, and more accurately and reliably reflect and predict the actual heat transfer performance of each open-frame vaporizer. Provide the actual vaporization capacity or minimum seawater required for each vaporizer under different working conditions, which is the key performance information of the open-frame vaporizer that is currently lacking and needs to be mastered on site. Based on this model, the start-stop optimization plan and load distribution of the open-frame vaporizer under different working conditions can be clarified, and a theoretical basis can be provided for the optimization of seawater pump output. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A technical roadmap for a heat transfer performance mechanism modeling method for an open-frame gasifier provided in one embodiment of the present invention; Figure 2 A schematic diagram of the heat transfer tube structure provided in this embodiment of the present invention; Figure 3 The heat exchange error calculated by the historical operation data of the LNG side and the seawater side provided in this embodiment of the present invention; Figure 4 Comparison of the calculation accuracy of the ORV heat transfer mechanism model before and after optimization provided in this embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention is described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work are within the scope of protection of the present invention.

[0020] Unless otherwise defined, the technical or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second", "third", "fourth" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0021] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside", "outside", "inner side", "outer side", "below", "above", etc. Such spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures.

[0022] There are occasional operating data at low seawater flow rates on site, but they lack systematicity and the operating time is generally short, which cannot provide data on the gasification capacity, energy consumption and economy of each open-frame gasifier under multi-condition and variable seawater flow rates over a long period of time. If you want to systematically master the operating performance of the open-frame gasifier, you need to select a suitable empirical formula for the convective heat transfer coefficient based on the operating mechanism of the open-frame gasifier, establish a heat transfer mechanism model for the open-frame gasifier, and optimize the model accuracy through the historical operating data of the receiving station. Then, based on the model, predict the minimum amount of seawater required for the open-frame gasifier when the seawater inlet temperature is 10~30℃, so as to effectively guide the optimal matching operation of the on-site seawater pump and ORV to meet production requirements and energy-saving expectations. The work of developing a heat transfer mechanism model for open-frame gasifiers combined with historical operating data is still in the exploratory stage.

[0023] Based on the above technical problems, the present invention provides a method, device, medium and equipment for modeling the heat transfer performance mechanism of an open-frame gasifier. The method integrates historical data, adopts advanced optimization algorithms, optimizes the heat transfer performance mechanism model of the open-frame gasifier, improves the model accuracy, and more accurately and reliably reflects and predicts the actual heat transfer performance of each open-frame gasifier. It provides the actual gasification capacity or the minimum amount of seawater required for each gasifier under different working conditions, which is the key performance information of the open-frame gasifier that is currently lacking and needs to be mastered on site.

[0024] like Figure 1 As shown, the open-frame gasifier heat transfer performance mechanism modeling method provided by the present invention includes the following specific steps: 1) According to the operating principle, structural dimensions and key operating parameters of the open-rack gasifier, a heat transfer performance mechanism model of the open-rack gasifier is established.

[0025] 2) Obtain historical operation data of the open rack vaporizer from the LNG receiving station site, preprocess the data, and obtain preprocessed data.

[0026] 3) Based on the preprocessed data, mathematical methods are used to optimize the open-frame gasifier heat transfer performance mechanism model and improve the accuracy of the mechanism model.

[0027] 4) Using the optimized open-rack vaporizer heat transfer performance mechanism model, the heat transfer performance of the vaporizer under different operating conditions is calculated to determine the optimal operation scheme of the vaporization unit of the LNG receiving station.

[0028] In the above step 1), according to the operating principle, structural dimensions and key operating parameters of the open-frame gasifier, the heat transfer performance mechanism model of the open-frame gasifier is established, which mainly includes the following steps: 1.1) Clarify the main structural dimensions of the open-frame vaporizer, including the tube diameter, fin height and thickness, and other fin structural dimensions, and the effective length of the fin tube.

[0029] The structure of the known open frame gasifier is as follows: Figure 2 As shown, assuming that the length of a single tube is l , the calculation process is given by taking the surface area A of a single finned tube as an example.

[0030] (1) Low fin surface area Heat exchange area

[0031] (2) Surface area of ​​middle fin Heat exchange area

[0032] (3) High fin surface area Heat exchange area

[0033] (4) Surface area of ​​base tube Heat exchange area A 4 :

[0034] (5) Surface area of ​​a single finned tube A:

[0035] 1.2) The key operating parameters of the open-frame vaporizer include LNG composition, inlet temperature, pressure and flow rate, and seawater inlet pressure, temperature and flow rate.

[0036] Heat transferred from seawater to the outer wall of the heat exchange tube:

[0037] Among them, c psw is the specific heat capacity of seawater at constant pressure, J / (kg·K); m sw is the mass flow rate of seawater, kg / s; Δ T sw is the temperature difference between the inlet and outlet of seawater, K.

[0038] The heat transferred from the inner wall of the tube to the LNG in the tube is:

[0039] in, m LNG is the LNG mass flow rate, kg / s; Δ H LNG is the LNG enthalpy difference, J / kg, which is related to the thermal state of LNG inlet and outlet.

[0040]

[0041] Using the logarithmic mean temperature difference method, the total heat transfer can be expressed as:

[0042] in, R tot is the heat transfer resistance, (m 2 ·K) / W; T LMTD is the logarithmic mean temperature difference, K.

[0043] 1.3) Establish the heat transfer performance mechanism model of the open-frame vaporizer. The heat resistance model of the open-frame vaporizer heat transfer is explained in the form of thermal resistance. It includes the convection heat transfer resistance and scale resistance of the hot fluid, i.e., the seawater side, and the convection heat transfer resistance and scale resistance of the cold fluid, i.e., the liquefied natural gas LNG side, as well as the heat conduction resistance model of the heat exchange wall between the hot and cold fluids. The expression is:

[0044] in, h o Indicates the convection heat transfer coefficient between the outer surface of the heat exchange tube and seawater, W / (m 2 K); β o is the rib coefficient; η o is the efficiency of the outer tube fin. h i Indicates the convection heat transfer coefficient between the inner surface of the heat exchange tube and LNG, W / (m 2 K); β i is the rib coefficient ; η iis the efficiency of the fins inside the tube. R i and R o is the thermal resistance of dirt inside and outside the tube, m 2 ·K / W. λ W is the thermal conductivity of aluminum alloy, W / (m·K).

[0045] In the above step 2), the data is preprocessed based on the historical operation data of the open-frame gasifier, which mainly includes the following steps: 2.1) Eliminate invalid operating conditions, including data points when the vaporizer is not turned on, the LNG and seawater flow rates are very low, and the seawater inlet temperature is lower than the NG outlet temperature.

[0046] 2.2) According to the law of conservation of energy, the data with large differences in heat exchange calculated based on the operating parameters of the LNG side and the seawater side are eliminated, and the following formula can be used as a reference:

[0047] Figure 3 The difference in heat exchange capacity calculated based on fluid parameters on different sides of an open-frame vaporizer obtained from historical operating data.

[0048] In the above step 3), the open-frame gasifier heat transfer performance mechanism model is optimized to improve the accuracy of the mechanism model, including the following steps: 3.1) Use the particle swarm algorithm in artificial intelligence algorithm to optimize the mechanism model.

[0049] 3.2) The total thermal resistance model in the open-frame gasifier heat transfer performance mechanism model is optimized. The optimized heat transfer performance mechanism model has improved accuracy compared with the original model. For details, see Figure 4 .

[0050] Step 4) includes the following specific steps: substituting the NG output volume and NG output temperature of the LNG receiving station, the LNG inlet parameters of each open-rack vaporizer including the inlet temperature, pressure and flow rate, the seawater inlet temperature and other operating parameters into the optimized open-rack vaporizer heat transfer performance mechanism model, obtaining the minimum seawater flow rate required for each open-rack vaporizer under the corresponding operating state, and thereby determining the seawater flow distribution and seawater pump start-stop plan for each open-rack vaporizer of the gasification unit of the LNG receiving station to achieve energy saving and consumption reduction.

[0051] The modeling method of the present invention is based on the actual operating performance of the equipment. By establishing a heat transfer performance mechanism model of an open-rack vaporizer based on historical operating data, the minimum seawater flow rate required for the open-rack vaporizer to complete the gasification task under different operating conditions is determined, and the required seawater flow rate is provided for optimizing the start-stop plan of the seawater pump, so as to achieve energy saving and consumption reduction of the gasification unit of the LNG receiving station.

[0052] A second aspect of the present invention provides an open-frame gasifier heat transfer performance mechanism modeling device, comprising: The first processing unit is used to establish a heat transfer performance mechanism model of the open-frame gasifier according to the operating principle, structural dimensions and key operating parameters of the open-frame gasifier; The second processing unit is used to obtain historical operation data of the open rack gasifier from the LNG receiving station site, pre-process the data, and obtain pre-processed data; A third processing unit is used to optimize the heat transfer performance mechanism model of the open rack gasifier by using a mathematical method according to the preprocessing data; The fourth processing unit is used to calculate the heat transfer performance of the vaporizer under different working conditions by using the optimized open-rack vaporizer heat transfer performance mechanism model, and determine the operation optimization plan of the vaporization unit of the LNG receiving station.

[0053] A third aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the computer program implements the steps of any one of the above-mentioned methods for modeling the heat transfer performance mechanism of an open-rack gasifier.

[0054] A fourth aspect of the present invention provides a computer device, comprising 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, the steps of any one of the above-mentioned methods for modeling the heat transfer performance mechanism of an open-frame gasifier are implemented.

[0055] The present invention is described in terms of flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to specific embodiments. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0056] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0057] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heat transfer performance mechanism modeling method for an open-frame gasifier, characterized in that: include: According to the operating principle, structural dimensions and key operating parameters of the open-frame gasifier, a heat transfer performance mechanism model of the open-frame gasifier is established; Obtain historical operating data of the open-rack vaporizer from the LNG receiving station site, pre-process the data, and obtain pre-processed data; Based on the preprocessed data, the mathematical method is used to optimize the heat transfer performance mechanism model of the open rack gasifier; The optimized open-rack vaporizer heat transfer performance mechanism model is used to calculate the heat transfer performance of the vaporizer under different operating conditions and determine the operation optimization scheme of the vaporization unit of the LNG receiving station.

2. The open-frame gasifier heat transfer performance mechanism modeling method according to claim 1, characterized in that: Key operating parameters include LNG inlet temperature, pressure and flow rate, and seawater inlet pressure, temperature, salinity and flow rate operating parameters.

3. The open-frame gasifier heat transfer performance mechanism modeling method according to claim 1, characterized in that: The heat transfer performance mechanism model of the open-frame gasifier is a total thermal resistance model that explains the heat transfer of the open-frame gasifier in the form of thermal resistance, which includes the convective heat transfer resistance and scale resistance of the hot fluid, i.e., the seawater side, and the convective heat transfer resistance and scale resistance of the cold fluid, i.e., the LNG side, as well as the thermal conductivity resistance model of the heat exchange wall between the hot and cold fluids.

4. The open-frame gasifier heat transfer performance mechanism modeling method according to claim 1, characterized in that: The historical operating data of the open-frame vaporizer includes the operating parameters of LNG composition, inlet temperature, pressure and flow, outlet NG temperature and pressure, seawater inlet pressure, temperature and flow, and seawater outlet temperature.

5. The open-frame gasifier heat transfer performance mechanism modeling method according to claim 1, characterized in that: Preprocess the data, including data supplementation, cleaning, standardization and working condition division.

6. The open-frame gasifier heat transfer performance mechanism modeling method according to claim 1, characterized in that: Mathematical methods include genetic algorithms or particle swarm algorithms; Optimize the heat transfer performance mechanism model of the open-frame gasifier, including the total thermal resistance model or the seawater side convective heat transfer resistance, seawater scale resistance, LNG side convective heat transfer resistance, LNG side scale resistance and the heat conduction thermal resistance model of the heat exchange wall between the cold and hot fluids in the heat transfer performance mechanism model of the open-frame gasifier.

7. The open-frame gasifier heat transfer performance mechanism modeling method according to claim 1, characterized in that: Determine the operation optimization plan of the gasification unit of the LNG receiving station, including the following steps: substitute the operating parameters including the LNG receiving station NG output, the open-rack gasifier LNG inlet parameters, the seawater inlet temperature and the field operation specification conditions into the optimized open-rack gasifier heat transfer performance mechanism model to obtain the minimum seawater flow required for the open-rack gasifier under the corresponding operating state, thereby determining the seawater flow distribution and seawater pump start-stop plan for each open-rack gasifier of the gasification unit to achieve energy saving and consumption reduction.

8. An open-frame gasifier heat transfer performance mechanism modeling device, characterized in that: include: The first processing unit is used to establish a heat transfer performance mechanism model of the open-frame gasifier according to the operating principle, structural dimensions and key operating parameters of the open-frame gasifier; The second processing unit is used to obtain historical operation data of the open rack gasifier from the LNG receiving station site, pre-process the data, and obtain pre-processed data; A third processing unit is used to optimize the heat transfer performance mechanism model of the open rack gasifier by using a mathematical method according to the preprocessing data; The fourth processing unit is used to calculate the heat transfer performance of the vaporizer under different working conditions by using the optimized open-rack vaporizer heat transfer performance mechanism model, and determine the operation optimization plan of the vaporization unit of the LNG receiving station.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the open rack gasifier heat transfer performance mechanism modeling method according to any one of claims 1 to 7 are implemented.

10. 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 open rack gasifier heat transfer performance mechanism modeling method according to any one of claims 1 to 7 are implemented.

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