Method and device for calculating calorific value of subway station equipment room

Abstract

The invention discloses a method and device for calculating the calorific value of a subway station equipment room, and the method comprises the following specific steps: setting a heating boundary condition, an air supply boundary condition and thermophysical parameters according to the design of a target equipment room and the geometric structure of the target equipment room, and building a physical model; setting any calculation section for monitoring the heat flux density of the inner wall surface of the enclosure structure in the physical model, and solving the physical model to obtain the heat flux density of the section; the heat flow density of any calculation section is combined with the area of the enclosure structure to calculate surrounding rock heat storage and release; and adding the equipment calorific value, the illumination calorific value and the surrounding rock storage and release heat in the target equipment room to obtain the actual calorific value of the target equipment room. According to the method, the surrounding rock heat storage and release of the subway target equipment room in different seasons, different equipment and different positions is calculated through theoretical analysis and numerical simulation methods, so that a basis is provided for calculation of the heating value of the subway target equipment room in a design stage.

Description

Technical Field

[0001] The present invention belongs to the technical field of subway thermal environment, and in particular to a method and device for calculating the heat generation of equipment rooms in subway stations. Background Art

[0002] The target equipment rooms of subway stations include DC switchgear rooms, AC switchgear rooms, switchgear rooms, rectifier transformer rooms, etc. Their main function is to accommodate various types of electromechanical equipment and provide guarantees for the efficient and safe operation of subway stations.

[0003] In order to ensure the normal operation of electromechanical equipment, it is necessary to create a reasonable and stable thermal environment in the target equipment room where the electromechanical equipment is stored. The "Metro Design Code" stipulates the winter and summer calculation temperatures for various target equipment rooms.

[0004] However, the "Metro Design Code" does not provide a calculation method for the residual heat of the target equipment room. In actual projects, the heating value of the subway target equipment room is mostly estimated using the area index method, resulting in the problem that the heating value of the designed equipment is far greater than the actual value. This has an adverse impact on the selection of air-conditioning equipment and energy conservation and consumption reduction during operation. Therefore, accurate calculation of the heating value of the target equipment room is very necessary.

[0005] As underground structures, subway stations have portions of their retaining structures in direct contact with the surrounding rock. The temperature difference between the surrounding rock and the retaining structure results in heat transfer between the retaining structure and the soil, a phenomenon known as heat storage and release from the surrounding rock. Current calculations of heat generation in subway target equipment rooms often ignore this heat transfer, leading to overloaded design for these target equipment rooms. In winter, temperatures in some target equipment rooms fall below the 16°C requirement in the Metro Design Code, resulting in excessively low temperatures.

[0006] Calculating surrounding rock heat storage and release can be done by on-site testing of wall heat flux density, or by on-site testing of the surface temperature of heating equipment, enclosures, and enclosures and using formulas for convective and radiative heat transfer. However, both of these methods calculate heat transfer after the target equipment room is operational, failing to meet the need for calculating surrounding rock heat storage and release in the early stages of design when field test data is lacking.

[0007] In summary, the heat storage and release of surrounding rock is crucial for accurately calculating the heat output of target equipment rooms. However, current methods for calculating this heat storage and release in the initial design stages are relatively limited. Therefore, it is necessary to propose an accurate method for calculating this heat storage and release in the surrounding rock of target equipment rooms during the design phase of subway stations. Summary of the Invention

[0008] In order to solve the problems existing in the prior art, the purpose of the present invention is to provide a method and device for calculating the calorific value of equipment rooms in subway stations. Through theoretical analysis and numerical simulation methods, the heat storage and release of the surrounding rock of the target subway equipment room in different seasons, different equipment, and different locations is calculated, thereby providing a basis for the calculation of the calorific value of the target subway equipment room during the design stage.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a method for calculating the calorific value of equipment rooms in subway stations, comprising the following specific steps:

[0010] According to the design of the target equipment room and its geometric structure, set the heating boundary conditions, air supply boundary conditions and thermophysical parameters to establish a physical model;

[0011] In the physical model, any calculation section for monitoring the heat flux density of the inner wall of the enclosure structure is set, and the heat flux density of the section is obtained by solving the physical model;

[0012] The heat flux density of any calculation section is combined with the area of ​​the surrounding structure to calculate the heat storage and release of the surrounding rock;

[0013] The actual heating value of the target equipment room is obtained by adding the heating value of the equipment, the lighting and the heat storage and release of the surrounding rock in the target equipment room.

[0014] Furthermore, the geometric structure data includes the length, width and height of the room, the thickness of the enclosure structure, the size and position of the heating equipment, the size and position of the supply and return air ducts and air outlets, and the position and thickness of the surrounding rock in contact with the enclosure structure.

[0015] Furthermore, the heating boundary conditions include equipment heating and lighting heating, wherein the equipment heating is calculated based on the number, power and surface area of ​​the equipment; the lighting heating is calculated based on the number, power and top area of ​​the lighting equipment; the wall surface between the room and the external area is set as an adiabatic boundary; the surface where the enclosure structure contacts the external area is set as an adiabatic boundary; the surface where the surrounding rock contacts the external area is set as an adiabatic boundary; the surface of the surrounding rock that is parallel to the enclosure structure and not in contact with the enclosure structure is set as a constant temperature boundary.

[0016] Furthermore, the air supply boundary conditions include air supply temperature and air supply volume, which are set according to the "Metro Design Code".

[0017] Furthermore, the thermal properties parameters include the initial temperature, density, specific heat capacity, and thermal conductivity of air, equipment surface material, enclosure structure, and surrounding rock. The initial temperature of the air thermal properties refers to the "Metro Design Code", and the air type is boussinesq; the surrounding rock thermal properties are set based on the soil data of the area where the equipment room is located. If there is a lack of test data on the initial temperature of the surrounding rock, the annual average temperature is used as the initial temperature of the surrounding rock; the equipment surface material is set based on measured data. If there is a lack of data, it is approximately set based on stainless steel; the enclosure structure thermal properties are set based on design data. If there is a lack of data, it is approximately set based on reinforced concrete.

[0018] Furthermore, the heat storage and release capacity of the surrounding rock can be calculated by combining the heat flux density and the inner wall area of ​​the enclosure structure, as follows:

[0019] Q 围岩 =q 围护结构 A 围护结构

[0020] Where: Q 围岩 To store and release heat through the surrounding rock of the enclosure structure; 围护结构 is the heat flux density through the inner wall of the enclosure structure; A 围护结构 is the area of ​​the inner wall of the enclosure structure;

[0021] The heat flux density on the inner wall of the enclosure structure is linearly related to the initial temperature of the surrounding rock, the heat generated by the equipment, the heat generated by the lighting, the air supply temperature, and the air supply volume, as follows:

[0022]

[0023] Where: k is the intercept of the empirical formula for heat storage and release of surrounding rock; a, b, c, d are the coefficients of initial temperature, calorific value, air supply temperature, and air supply volume of surrounding rock, respectively; q 围护结构 is the heat flux density of surrounding rock through the retaining structure; t 围岩 is the initial temperature of the surrounding rock; n is the number of electromechanical equipment; Q 设备 is the power of a single electromechanical device; m is the number of lighting equipment; Q 照明 is the power of a single lighting device; t in is the supply air temperature; L a For the air supply volume.

[0024] The present invention also provides a system for calculating the heat generation in a target equipment room of a subway station, which runs the above-mentioned method for calculating the heat generation of an equipment room of a subway station, comprising:

[0025] The model building module is used to set heating boundary conditions, air supply boundary conditions and thermophysical parameters according to the design of the target equipment room and the geometric structure of the target equipment room, and to establish a physical model;

[0026] The model solving module is used to set any calculation section for monitoring the heat flux density of the inner wall of the enclosure structure in the physical model, and solve the physical model to obtain the heat flux density of the section;

[0027] A surrounding rock heat storage and release calculation module is used to calculate the surrounding rock heat storage and release in combination with the heat flux density of any calculation section and the area of ​​the surrounding structure;

[0028] The actual heating value calculation module is used to add the equipment heating value, lighting heating value and surrounding rock storage and release heat in the target equipment room to obtain the actual heating value of the target equipment room.

[0029] The present invention also provides a terminal device, including a memory, a processor, and a computer program stored in the memory and runnable on the processor. When the processor executes the computer program, the steps of the above-mentioned method for calculating the heat generation of the equipment room in a subway station are implemented.

[0030] The present invention also provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it implements the steps of the above-mentioned method for calculating the heat generation of equipment rooms in a subway station.

[0031] The present invention also provides a computer program product, comprising a computer program, which, when executed by a processor, implements the steps of the above-mentioned method for calculating the heat generation of equipment rooms in a subway station.

[0032] Compared with the prior art, the present invention has at least the following beneficial effects:

[0033] The present invention provides a method for calculating the calorific value of equipment rooms in subway stations. Based on the design parameters of the target equipment rooms, a multi-factor physical model is established to comprehensively simulate the actual thermal environment of the target equipment rooms in subway stations. Through multi-dimensional comprehensive considerations, the present invention significantly improves the accuracy of calorific value calculations, providing a more reliable technical basis for the design, operation and maintenance of subway stations.

[0034] This invention not only takes into account direct factors such as surrounding rock temperature, room temperature, and equipment heat generation, but also deeply analyzes the impact of indirect factors such as wall position on the surrounding rock heat storage and release. This method proposes a precise calculation method for the surrounding rock heat storage and release in the equipment management room of a subway station, and provides empirical formulas for estimating the surrounding rock heat storage and release based on different conditions. This combination of precise calculations and empirical formulas not only ensures the accuracy of the calculation results, but also improves the practicality and flexibility of the calculation method. In practical applications, designers can choose to use precise calculation methods or empirical formulas according to specific circumstances to quickly estimate the surrounding rock heat storage and release, providing a convenient and efficient tool for design decisions.

[0035] This invention provides a more accurate and comprehensive calculation method for subway thermal environment research, helping to promote technological advancement in thermal environment management across the subway industry. By accurately calculating the heat output of target equipment rooms in subway stations, this method can provide a scientific basis for the design of subway system air conditioning systems and the optimization of ventilation schemes, helping to reduce subway construction costs, improve energy efficiency, and reduce energy waste. Furthermore, the application of this invention will help improve the operational efficiency and safety of subway systems, providing passengers with a more comfortable and safe travel environment.

[0036] In summary, the present invention provides a more accurate and comprehensive calculation method in the field of subway thermal environment research, significantly improving the calculation accuracy of heat generation during the design phase of target equipment rooms in subway stations, and providing important technical support for the design, operation, and maintenance of subway stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 Schematic diagram of the calculation domain and various structures of the present invention;

[0038] In the figure, 1, surrounding rock; 2, enclosure structure; 3, return air duct; 4, supply air duct; 5, electromechanical equipment;

[0039] Figure 2 This is a schematic diagram of the calculation principle of the present invention and the heat transfer of each area;

[0040] Figure 3 This is a graph showing the change of surrounding rock heat storage and release along with surrounding rock temperature under given conditions of the present invention;

[0041] Figure 4 This is a graph showing the variation of heat storage and release of surrounding rock along with heat output under given conditions of the present invention;

[0042] Figure 5 This is a graph showing the variation of surrounding rock heat storage and release with air supply temperature under given conditions of the present invention;

[0043] Figure 6 This is a graph showing how the heat storage and release of surrounding rock changes with air supply volume under given conditions of the present invention;

[0044] Figure 7 It is a comparison diagram of the heat storage and release of the surrounding rock simulated by the present invention and the heat storage and release of the surrounding rock fitted. DETAILED DESCRIPTION

[0045] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0046] The present invention discloses a method for calculating the calorific value of equipment rooms in subway stations. Specifically, a physical model is constructed based on the structure of the target equipment room, the power and location of the heating electrical equipment, the supply and return air outlets and air volume, the surrounding rock temperature, and the room temperature. Boundary conditions and thermophysical parameters are set, and the physical model is solved to obtain the surrounding rock heat storage and release heat of the target equipment room. The obtained surrounding rock heat storage and release heat can provide a basis for calculating the calorific value of the target equipment room during the design stage. The specific steps are as follows:

[0047] Step 1: Establish a physical model of the target equipment room in the subway station. The physical model is mainly based on the geometric structure and boundary conditions of the target equipment room, including the following aspects:

[0048] 1) Acquisition of geometric structure data of target equipment room

[0049] Based on the design parameters of the target equipment room, determine the structural dimensions and location of the room, including the length, width and height of the room, the thickness of the enclosure structure, the size and location of the heating equipment, the size and location of the supply and return air ducts and air outlets, and the location and thickness of the surrounding rock in contact with the enclosure structure.

[0050] 2) Boundary condition settings, including: heating boundary conditions, air supply boundary conditions

[0051] 2.1) Setting of heating boundary conditions

[0052] The heat storage and release of surrounding rock is related to the heat source in the target equipment room. Due to the temperature difference between the enclosure structure and the heat source, there is radiation heat transfer between the two, so it is necessary to set the heating boundary in the target equipment room.

[0053] (a) Equipment heat generation

[0054] Set the surface of the electromechanical equipment in the model to a constant heat flux boundary condition. The heat flux density is calculated as follows: Based on the design data, determine the number and power of the electromechanical equipment in the room to calculate the heat generated by the equipment. Combined with the surface size of the equipment, the surface heat flux density of the electromechanical equipment is calculated. The heat flux density calculation formula is as follows

[0055]

[0056] Where: q 设备 is the surface heat flux density of electromechanical equipment, W / m 2 ; n is the number of electromechanical equipment, units; Q 设备 is the power of a single electromechanical device, W; A 设备 is the total area of ​​contact between electromechanical equipment and indoor air and ground, m 2 .

[0057] (b) Lighting heat generation

[0058] Set the target equipment room roof in the model to a constant heat flux boundary condition. The heat flux calculation method is as follows: Based on the design data, determine the number and power of the lighting equipment in the room to calculate the lighting heat output. Combined with the surface size of the room roof, calculate the surface heat flux of the lighting equipment. The heat flux calculation formula is as follows:

[0059]

[0060] Where: q 照明 is the surface heat flux density of the lighting equipment installed on the top of the room, W / m 2 ; m is the number of lighting equipment, units; Q 照明 is the power of a single lighting device, W; A 房间顶部 is the top area of ​​the room, m 2 .

[0061] In the absence of lighting equipment information, the lighting equipment should not exceed 9.5W / m 2 Make an estimate.

[0062] After field testing, it was found that the temperature difference between the target equipment room and the adjacent room was less than 2°C, and the heat transfer between the two was small. Therefore, the heat transfer between the target equipment room and other rooms was ignored, and the wall surface between the room and the external area was set as an adiabatic boundary. The surface where the enclosure structure contacts the external area was set as an adiabatic boundary, the surface where the surrounding rock contacts the external area was set as an adiabatic boundary, and the surface of the surrounding rock that is parallel to the enclosure structure and not in contact with the enclosure structure was set as a constant temperature boundary. The heating boundary conditions were set as follows: Figure 2 shown.

[0063] 2.2) Setting of air supply boundary conditions

[0064] The heat storage and release of surrounding rock is related to the air supply parameters. Due to the temperature difference between the enclosure structure and the indoor air, there is convective heat transfer between the two, so it is necessary to set the air supply boundary in the target equipment room.

[0065] 4. Setting of thermal physical parameters

[0066] Thermal properties of the air in the target equipment room: The initial temperature is set to 27-36°C in summer and 16°C in winter, referring to the "Metro Design Code". The air type is boussinesq to consider the impact of temperature changes on the thermal properties of the air.

[0067] The surrounding rock thermal properties are based on the soil data of the target equipment room area, including density, specific heat capacity, thermal conductivity, and initial temperature. If test data for the initial surrounding rock temperature is lacking, the annual average temperature can be used as the initial surrounding rock temperature.

[0068] The density, specific heat capacity and thermal conductivity of the equipment surface material are set according to the measured data. If there is a lack of data, it can be approximately set according to stainless steel with a density of 7900kg / m 3 , specific heat capacity 502 (J / (kg·℃)), thermal conductivity 16.3 (W / (m·℃)).

[0069] The thermal properties of the enclosure structure are set according to the design data, including density, specific heat capacity, and thermal conductivity. If there is a lack of data, it can be approximately set according to reinforced concrete with a density of 2500kg / m 3 , specific heat capacity 920 (J / (kg·℃)), and thermal conductivity 1.74 (W / (m·℃)).

[0070] 5. Monitoring heat flux in simulation results

[0071] Due to the temperature difference between the equipment room and the surrounding rock, there is heat transfer between the equipment room and the surrounding rock, that is, the surrounding rock stores and releases heat. The heat stored and released by the surrounding rock is transferred through the surrounding structure in contact with the surrounding rock. The heat flux density through the surrounding structure is as follows:

[0072]

[0073] Where: q 围护结构 is the heat flux density of heat storage and release through the surrounding rock of the enclosure structure, W / m 2 ;t 围护结构 is the temperature of the enclosure structure, °C; t 围岩 is the surrounding rock temperature, ℃; λ is the thermal conductivity of the enclosure structure, W / (m·℃); δ is the thickness of the enclosure structure, m.

[0074] The heat flux density of the inner wall of the retaining structure in contact with the surrounding rock in the simulation is monitored by monitoring the heat flux density of the inner wall of the retaining structure. The monitoring surface is set as follows: Figure 2 As shown. Combined with the area of ​​the retaining structure, the heat transfer between the surrounding rock and the retaining structure can be solved.

[0075] 6. Calculation and application of surrounding rock heat storage and release

[0076] The heat storage and release of surrounding rock can be calculated by combining the heat flux density and the inner wall area of ​​the enclosure structure. The calculation formula is as follows:

[0077] Q 围岩 =q 围护结构 A 围护结构

[0078] Where: Q 围岩 is the heat stored and released by the surrounding rock of the enclosure structure, W; q 围护结构 is the heat flux density through the inner wall of the enclosure structure, W / m 2 ; A 围护结构 is the area of ​​the inner wall of the enclosure structure, m2 .

[0079] After calculating the heat storage and release of the surrounding rock, the actual heat generation of the equipment room can be calculated by combining the heat generation of the equipment and the heat generation of the lighting, and the required air volume can be calculated. The formula for calculating the actual heat generation of the room is as follows:

[0080] Q 房间 =nQ 设备 +mQ 照明 +Q 围岩

[0081] 7. Empirical formula for heat storage and release of surrounding rock

[0082] In actual projects, the air supply volume and temperature change with the outdoor environment and the operating mode of the air-conditioning system. The surrounding rock temperature increases with the increase of the operating years of the subway station. The heat generated by equipment and lighting decreases when the subway station is closed.

[0083] In order to explore the influence of changes in surrounding rock temperature, air supply temperature and other conditions on the surrounding rock heat storage and release, and thus obtain accurate calculations of the surrounding rock heat storage and release under different conditions, it is necessary to propose a formula for the change of surrounding rock heat storage and release with respect to the initial temperature of the surrounding rock, the heat generated by the equipment, the heat generated by the lighting, the air supply temperature and the air supply volume.

[0084] The heat storage and release of surrounding rock is in a linear relationship with the above factors, so the heat flux density formula of the enclosure structure is:

[0085]

[0086] Where: k is the intercept of the empirical formula for heat storage and release of surrounding rock; a, b, c, d are the coefficients of initial temperature, calorific value, air supply temperature, and air supply volume of surrounding rock, respectively; q 围护结构 is the heat flux density of heat storage and release through the surrounding rock of the enclosure structure, W / m 2 ;t 围岩 is the initial temperature of the surrounding rock, ℃; n is the number of electromechanical equipment, units; Q 设备 is the power of a single electromechanical device, W; m is the number of lighting equipment, units; Q 照明 is the power of a single lighting device, W; t in is the supply air temperature, ℃; L a is the air supply volume, m 3 The intercept k and coefficients a, b, c, and d in the formula are obtained by fitting the surrounding rock heat storage and release under different surrounding rock initial temperatures, equipment heat generation, lighting heat generation, air supply temperature, and air supply volume.

[0087] In summary, the present invention establishes a physical model of the target equipment room in a subway station, including surrounding rock, retaining structure, heat-generating electrical equipment, and air, and considers variable factors such as surrounding rock temperature, room temperature, equipment heat generation, and wall position. A method for accurately calculating the heat storage and release of the surrounding rock of the target equipment room under different conditions is provided, and an empirical formula for estimating the heat storage and release of the surrounding rock under different conditions is also provided.

[0088] Example 1

[0089] (1) Establishment of physical model

[0090] According to the design parameters of a target equipment room in a subway station in Xi'an, the position and size of each structure in the room are determined. The main structures include return air duct 3, supply air duct 4 and air outlet, electromechanical equipment 5, surrounding rock 1, and enclosure structure 2. The sizes of each structure are shown in Table 1 below. Among them, the enclosure structure only builds the side walls and bottom walls in contact with the surrounding rock, and the remaining enclosure structures are in contact with other rooms. Since the temperature difference between the rooms is small, the heat transfer through this part of the enclosure structure is small and can be ignored. The size of the surrounding rock extends 10m in the length, width (or height) direction of the enclosure structure, and the thickness of the surrounding rock is set to 10m. Establish a 1:1 full-scale model of the target equipment room as shown in the figure below. Figure 1 As shown, meshing is performed simultaneously to provide mesh files for the final solution calculation.

[0091] Table 1. Main structure and dimensions of a target equipment room at a subway station in Xi'an

[0092]

[0093] (2) Setting of heating boundary conditions

[0094] (a) Equipment heat generation

[0095] According to the number and power of electromechanical equipment, combined with the surface size of the equipment, the surface heat flux density of the electromechanical equipment is calculated.

[0096]

[0097] (b) Lighting heat generation

[0098] Take 9.5W / m 2 Make an estimate.

[0099] (3) Setting of air supply boundary conditions

[0100] Formula for calculating the air supply volume of the target equipment room.

[0101] L a =εV 房间 =5×1091.34=5456.7(m 3 / h)

[0102] The room temperature is calculated as 27°C in summer according to the "Metro Design Code", and the supply air temperature is calculated as 24°C with a 3°C supply air temperature difference according to the "Civil Building Heating, Ventilation and Air Conditioning Design Code".

[0103] (4) Setting of thermal physical parameters

[0104] The thermal properties of the set air, equipment surface materials, enclosure structures, and surrounding rocks are shown in the table below.

[0105] Table 2. Thermophysical properties of each part

[0106]

[0107] (5) Setting of monitoring parameters

[0108] The heat flux density of the inner wall of the retaining structure in contact with the surrounding rock was monitored, and the heat flux density of the inner wall of the side wall and bottom wall retaining structure was 16.55W / m 2 、13.95W / m 2 .

[0109] (6) Calculation and application of heat storage and release of surrounding rock

[0110] The heat storage and release capacity of the surrounding rock is calculated by combining the heat flux density and the inner wall area of ​​the enclosure structure.

[0111] Sidewall: Q 围岩 =16.55×116.1=1921.46(W)

[0112] Bottom wall: Q 围岩 =13.95×202.1=2819.30(W)

[0113] Calculate the actual heating value of the room.

[0114] Q 房间 =26×600+9.5×202+1921.46+2819.30=22259.76(W)

[0115] 7. Empirical formula

[0116] The surrounding rock heat storage and release under different initial rock temperature, heat generation (the sum of equipment heat generation and lighting heat generation), air supply temperature, and air supply volume are simulated. The simulation data are shown in Figure 3 、 4 , 5, and 6. It can be seen from the figure that the heat storage and release of the surrounding rock through the retaining structure shows a linear change law with the initial temperature of the surrounding rock, calorific value, air supply temperature, air supply volume, and the position of the retaining structure.

[0117] Linear regression analysis was conducted on the heat storage and release of the enclosure structures at different locations in relation to the initial temperature of the surrounding rock, the heat generated by the equipment, the heat generated by the lighting, the air supply temperature, and the air supply volume. The results are shown in the following table:

[0118] Table 4. Coefficients of heat flux formula for inner surface of side wall and bottom wall

[0119]

[0120] The heat flux formulas for the side wall and bottom wall are:

[0121]

[0122] Where: q 侧墙 is the heat flux density of surrounding rock through the side wall, W / m 2 ;q 底墙 is the heat flux density of surrounding rock through the bottom wall, W / m 2 ;t 围岩 is the initial temperature of the surrounding rock, ℃; n is the number of electromechanical equipment, units; Q 设备 is the power of a single electromechanical device, W; m is the number of lighting equipment, units; Q 照明 is the power of a single lighting device, W; t in is the supply air temperature, ℃; L a is the air supply volume, m 3 / h.

[0123] Substituting the heat storage and release of surrounding rocks at different locations into the formula related to initial soil temperature, equipment heating value, lighting heating value, air supply temperature and air supply volume can determine the heat storage and release of surrounding rocks of the target equipment room.

[0124] Figure 7 The comparison of the simulated heat flux density values ​​of the enclosure structure at different locations and the heat flux density values ​​obtained by the fitting function. The red color in the figure is the side wall data and the blue color is the bottom wall data. It can be seen from the three-dimensional coordinate points in the figure that the simulated values ​​of the side wall and the bottom wall are relatively consistent with the fitting function values. The projection of the three-dimensional coordinate points on the plane can more intuitively reflect the consistency of the simulated values ​​and the fitting function values. After the fitting function of the side wall and the bottom wall is adjusted, R 2 Both are 0.99, and the fitting results are good.

[0125] The following are device embodiments of the present invention, which can be used to implement the method embodiments of the present invention. For details not disclosed in the device embodiments, please refer to the method embodiments of the present invention.

[0126] In another embodiment of the present invention, a system for calculating the heat generation in a target equipment room of a subway station is provided. The system runs the above-mentioned method for calculating the heat generation of an equipment room of a subway station, including:

[0127] The model building module is used to set heating boundary conditions, air supply boundary conditions and thermophysical parameters according to the design of the target equipment room and the geometric structure of the target equipment room, and to establish a physical model;

[0128] The model solving module is used to set any calculation section for monitoring the heat flux density of the inner wall of the enclosure structure in the physical model, and solve the physical model to obtain the heat flux density of the section;

[0129] A surrounding rock heat storage and release calculation module is used to calculate the surrounding rock heat storage and release in combination with the heat flux density of any calculation section and the area of ​​the surrounding structure;

[0130] The actual heating value calculation module is used to add the equipment heating value, lighting heating value and surrounding rock storage and release heat in the target equipment room to obtain the actual heating value of the target equipment room.

[0131] In another embodiment of the present invention, a terminal device is provided, comprising a processor and a memory, wherein the memory is used to store a computer program, the computer program including program instructions, and the processor is used to execute the program instructions stored in the computer storage medium. The processor may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, and is suitable for implementing one or more instructions, specifically suitable for loading and executing one or more instructions to implement corresponding method processes or corresponding functions; the processor described in the embodiment of the present invention can implement the operation of a method for calculating the heat generation of equipment rooms in subway stations.

[0132] In another embodiment of the present invention, the present invention further provides a storage medium, specifically a computer-readable storage medium (Memory), which is a memory device in a terminal device for storing programs and data. It is understandable that the computer-readable storage medium here can include both the built-in storage medium in the terminal device and, of course, the extended storage medium supported by the terminal device. The computer-readable storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space. These instructions can be one or more computer programs (including program codes). It should be noted that the computer-readable storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory. The processor can load and execute one or more instructions stored in the computer-readable storage medium to implement the corresponding steps of the method for calculating the heat generation of a subway station equipment room in the above embodiment.

[0133] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can 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 can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0134] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes 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 produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. 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.

[0135] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work 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 The function specified in one or more boxes.

[0136] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0137] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A method for calculating the calorific value of equipment rooms in subway stations, characterized in that: The specific steps are as follows: According to the design of the target equipment room and its geometric structure, set the heating boundary conditions, air supply boundary conditions and thermophysical parameters to establish a physical model; In the physical model, any calculation section for monitoring the heat flux density of the inner wall of the enclosure structure is set, and the heat flux density of the section is obtained by solving the physical model; The heat flux density of any calculation section is combined with the area of ​​the surrounding structure to calculate the heat storage and release of the surrounding rock; The actual heating value of the target equipment room is obtained by adding the heating value of the equipment, the lighting and the heat storage and release of the surrounding rock in the target equipment room.

2. The method for calculating the calorific value of a subway station equipment room according to claim 1, characterized in that: The geometric structure data includes the length, width and height of the room, the thickness of the enclosure structure, the size and position of the heating equipment, the size and position of the supply and return air ducts and air outlets, and the position and thickness of the surrounding rock in contact with the enclosure structure.

3. The method for calculating the calorific value of a subway station equipment room according to claim 1, characterized in that: The heating boundary conditions include the heating value generated by the equipment and the lighting. The heating value generated by the equipment is calculated based on the number, power and surface area of ​​the equipment; the lighting heating value is calculated based on the number, power and top area of ​​the lighting equipment; the wall surface between the room and the external area is set as an adiabatic boundary; the surface where the enclosure structure contacts the external area is set as an adiabatic boundary; the surface where the surrounding rock contacts the external area is set as an adiabatic boundary; the surface of the surrounding rock that is parallel to the enclosure structure and not in contact with the enclosure structure is set as a constant temperature boundary.

4. The method for calculating the calorific value of a subway station equipment room according to claim 1, characterized in that: The air supply boundary conditions include air supply temperature and air supply volume, which are set according to the "Metro Design Code".

5. The method for calculating the calorific value of a subway station equipment room according to claim 1, characterized in that: Thermophysical property parameters include the initial temperature, density, specific heat capacity, and thermal conductivity of air, equipment surface material, enclosure structure, and surrounding rock. The initial temperature of the air thermal properties refers to the "Metro Design Code", and the air type is boussinesq. The thermal properties of the surrounding rock are set based on the soil data of the area where the equipment room is located. If test data is lacking, the annual average temperature will be used as the initial temperature of the surrounding rock. The equipment surface material is set based on measured data. If data is lacking, it is approximately set based on stainless steel. The thermal properties of the enclosure structure are set based on design data. If data is lacking, it is approximately set based on reinforced concrete.

6. The method for calculating the calorific value of a subway station equipment room according to claim 1, characterized in that: The heat storage and release of surrounding rock can be calculated by combining the heat flux density and the inner wall area of ​​the enclosure structure, as follows: Q 围岩 =q 围护结构 A 围护结构 Where: Q 围岩 To store and release heat through the surrounding rock of the enclosure structure; 围护结构 is the heat flux density through the inner wall of the enclosure structure; A 围护结构 is the area of ​​the inner wall of the enclosure structure; The heat flux density on the inner wall of the enclosure structure is linearly related to the initial temperature of the surrounding rock, the heat generated by the equipment, the heat generated by the lighting, the air supply temperature, and the air supply volume, as follows: Where: k is the intercept of the empirical formula for heat storage and release of surrounding rock; a, b, c, d are the coefficients of initial temperature, calorific value, air supply temperature, and air supply volume of surrounding rock, respectively; q 围护结构 is the heat flux density of surrounding rock through the retaining structure; t 围岩 is the initial temperature of the surrounding rock; n is the number of electromechanical equipment; Q 设备 is the power of a single electromechanical device; m is the number of lighting equipment; Q 照明 is the power of a single lighting device; t in is the supply air temperature; L a For the air supply volume.

7. A system for calculating the heat amount in target equipment rooms in subway stations, characterized in that: A method for calculating the heat generation of a subway station equipment room according to any one of claims 1 to 6, comprising: The model building module is used to set heating boundary conditions, air supply boundary conditions and thermophysical parameters according to the design of the target equipment room and the geometric structure of the target equipment room, and to establish a physical model; The model solving module is used to set any calculation section for monitoring the heat flux density of the inner wall of the enclosure structure in the physical model, and solve the physical model to obtain the heat flux density of the section; A surrounding rock heat storage and release calculation module is used to calculate the surrounding rock heat storage and release in combination with the heat flux density of any calculation section and the area of ​​the surrounding structure; The actual heating value calculation module is used to add the equipment heating value, lighting heating value and surrounding rock storage and release heat in the target equipment room to obtain the actual heating value of the target equipment room.

8. A terminal 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 the method for calculating the heat generation of a subway station equipment room according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method for calculating the heat generation of equipment rooms in a subway station according to any one of claims 1 to 6 are implemented.

10. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method for calculating the heat generation of equipment rooms in a subway station according to any one of claims 1 to 6 are implemented.

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