Shell-and-tube C-shaped tube bundle heat exchanger simulation device and design method thereof

Abstract

The invention relates to the technical field of heat exchanger simulation, and discloses a tube shell type C-shaped tube bundle heat exchanger simulation device and a design method thereof.The device comprises a shell of a hollow structure, and a C-shaped tube bundle is arranged in the shell; the filling structure is arranged in the shell, and the filling structure is connected with the shell; the two sets of filling structures are arranged, one set of filling structures is arranged on the first side of the C-shaped tube bundle, the other set of filling structures is arranged on the second side of the C-shaped tube bundle, the two sets of filling structures are oppositely arranged, and the multiple filling structures in each set are arranged one by one in the axis extending direction of the shell. Through the arrangement of the filling structure, the internal volume of the simulation device shell is reduced, the water volume on the side of the simulation device shell is reduced, the huge distortion degree generated by a scaling test is reduced, and the simulation accuracy is improved.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchanger simulation, and in particular to a shell and tube type C-shaped tube bundle heat exchanger simulation device and a design method thereof. Background Art

[0002] In the power system, the shell and tube C-tube bundle heat exchanger is a new type of high-efficiency heat exchange equipment. The C-tube bundle structure can effectively suppress the local backflow phenomenon of the U-tube bundle heat exchanger under low-load conditions, and can improve the heat exchange efficiency of the heat exchanger. However, whether in the scaled-down simulation test research of the power system or the scaled-down test research on the performance of the heat exchanger, there is a significant difference between the scaled-down simulation of the C-tube bundle heat exchanger and the scaled-down simulation of the U-tube bundle heat exchanger. Since the C-tube bundle arrangement is the key parameter for suppressing the backflow phenomenon of some heat transfer tubes under low load, in order to accurately simulate its backflow suppression characteristics, the heat transfer tubes of each layer of tube length must be simulated in the scaled-down test, that is, the number of rows of heat transfer tubes must be exactly the same as that of the prototype heat exchanger. Based on this requirement, in order to meet the scaled-down ratio, the scaled-down can only be performed on the number of roots in each row of tubes. This simulation principle will cause the entire C-shaped heat transfer tube bundle to have a flat layout cross-section. The diameter of the pressure cylinder on the shell side must be designed according to the long side of the tube bundle layout cross-section. The container diameter is large, and there will be a huge water volume on the shell side of the simulation body, which will cause huge distortion in the scaled-down test. Summary of the invention

[0003] In view of this, the present invention provides a shell and tube C-shaped tube bundle heat exchanger simulation device and a design method thereof.

[0004] Specifically, the following technical solutions are included:

[0005] In a first aspect, a shell and tube C-shaped tube bundle heat exchanger simulation device is provided, comprising:

[0006] A shell, wherein the shell is a hollow structure, and a C-shaped tube bundle is arranged in the shell;

[0007] A filling structure, wherein the filling structure is disposed in the shell and connected to the shell;

[0008] The filling structures are arranged in two groups, one group of the filling structures is arranged on the first side of the C-shaped tube bundle, and the other group of the filling structures is arranged on the second side of the C-shaped tube bundle. The two groups of the filling structures are arranged opposite to each other, and the multiple filling structures in each group are arranged one by one along the axial extension direction of the shell.

[0009] Preferably, the filler in the filling structure is water.

[0010] Preferably, the filling structure comprises a sealed shell and reinforcing ribs, the sealed shell has a receiving cavity, and a filler is placed in the receiving cavity;

[0011] The reinforcing ribs are arranged on the inner wall of the sealing shell.

[0012] Preferably, the shape of at least one wall surface of the sealed shell is consistent with the shape of the wall surface of the housing.

[0013] Preferably, the filling structure further comprises a mounting channel, wherein the mounting channel passes through the sealing shell, the mounting channel and the sealing shell are sealedly connected, and the mounting channel and the sealing shell are not in communication.

[0014] Preferably, the heat exchanger simulation device further comprises a fixed frame;

[0015] The fixing frame is connected to the shell, and the fixing frame is arranged on the inner wall of the shell;

[0016] The filling structure is arranged on the fixing frame.

[0017] In a second aspect, a design method for a shell and tube C-shaped tube bundle heat exchanger simulation device is provided, which is used to design a shell and tube C-shaped tube bundle heat exchanger simulation device as described in the first aspect, and the method comprises:

[0018] Determine the shell data and tube bundle data of the heat exchanger simulation device according to the simulation scale, shell data and tube bundle data of the full-size heat exchanger;

[0019] Determine the total volume of the two groups of filling structures according to the reduction simulation criterion number and the shell data of the heat exchanger simulation device;

[0020] Based on user settings, determining the number of the filling structures in each group and the outer dimensions of each filling structure according to the total volume of the two groups of filling structures;

[0021] Obtaining the shell heat capacity of the heat exchanger simulation device, the total solid heat capacity of the filling structure and a preset heat capacity ratio distortion rule, and determining the thickness of the sealed shell of each filling structure;

[0022] Calculating the water filling volume of each of the filling structures according to the thickness of the sealed shell of each of the filling structures and based on a preset water volume calculation model;

[0023] Based on a preset installation sequence, the filling structure is installed layer by layer.

[0024] Preferably, the total volume of the two groups of filling structures is determined according to the reduction simulation criterion number and the shell data of the heat exchanger simulation device, including:

[0025] Determine the shell side water volume of the heat exchanger simulation device based on the scaled simulation criteria, fluid flow rate, temperature difference and specific heat capacity of the full-size heat exchanger;

[0026] The total volume of the two groups of filling structures is determined according to the shell side water volume of the heat exchanger simulation device and the shell data of the heat exchanger simulation device.

[0027] Preferably, obtaining the shell heat capacity of the heat exchanger simulation device, the total solid heat capacity of the filling structure and a preset heat capacity ratio distortion rule, and determining the thickness of the sealed shell of each filling structure comprises:

[0028] Calculating the degree of distortion according to the shell heat capacity of the heat exchanger simulation device and the total solid heat capacity of the filling structure;

[0029] When the distortion meets the preset heat capacity ratio distortion rule, determining the total weight of the filling structure;

[0030] The thickness of the sealed shell of each filling structure is determined according to the number of the filling structures and the outer dimensions of each filling structure.

[0031] Preferably, according to the thickness of the sealed shell of each filling structure, based on a preset water volume calculation model, the water volume of each filling structure is calculated, including:

[0032] Obtaining the hot-state maximum temperature and the corresponding external first pressure, the hot-state minimum temperature and the corresponding external second pressure of the filling structure;

[0033] determining the internal volume of the filling structure according to the outer dimensions of the filling structure and the thickness of the sealed shell of the filling structure;

[0034] According to the hot state minimum temperature, a first water filling amount corresponding to when the internal water is just completely evaporated and in a saturated state at the hot state minimum temperature is calculated;

[0035] Based on the preset minimum internal and external pressure difference, the hot state maximum temperature and the external first pressure, the second water filling volume under the hot state maximum temperature and the internal maximum pressure is calculated;

[0036] The water filling amount in the filling structure is determined according to the first water filling amount and the second water filling amount.

[0037] The beneficial effects of the technical solution provided by the present invention include at least:

[0038] The present application reduces the internal volume of the simulation device shell by providing a filling structure, reduces the water volume on the shell side of the simulation device, reduces the huge distortion produced by the scaled-down test, and improves the accuracy of the simulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 A schematic cross-sectional structure diagram of a shell and tube C-shaped tube bundle heat exchanger simulation device according to an embodiment of the present invention;

[0041] Figure 2 For one embodiment of the present invention Figure 1 Schematic diagram of the AA cross-section structure;

[0042] Figure 3 For one embodiment of the present invention Figure 1 Schematic diagram of the cross-section structure of the middle BB;

[0043] Figure 4 A perspective structural diagram of a filling structure according to an embodiment of the present invention;

[0044] Figure 5 The figure is a schematic diagram of the design process of a shell and tube C-tube bundle heat exchanger simulation device according to an embodiment of the present invention.

[0045] The reference numerals in the figures represent respectively:

[0046] 1-shell; 2-tube side inlet; 3-tube side outlet; 4-tube bundle; 5-shell side outlet; 6-shell side inlet; 7-filling structure; 71-sealing shell; 72-reinforcement rib; 73-installation channel; 8-fixed frame.

[0047] The above drawings have shown clear embodiments of the present invention, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present invention in any way, but to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 technicians in this field without creative work are within the scope of protection of the present invention.

[0049] Before further describing the embodiments of the present invention in detail, the directional nouns involved in the embodiments of the present invention, such as "upper part", "lower part", "side part", etc., are Figure 1 The directions shown in the figure are for reference only and do not limit the protection scope of the present invention.

[0050] To make the technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0051] like Figures 1 to 4 As shown, in the first aspect, a shell and tube type C-shaped tube bundle heat exchanger simulation device is provided, comprising: a shell 1, the shell 1 is a hollow structure, and the C-shaped tube bundle 4 is arranged in the shell 1; a filling structure 7, the filling structure 7 is arranged in the shell 1, and the filling structure 7 is connected to the shell 1; two groups of filling structures 7 are arranged, one group of filling structures 7 is arranged on the first side of the C-shaped tube bundle 4, and the other group of filling structures 7 is arranged on the second side of the C-shaped tube bundle 4, the two groups of filling structures 7 are arranged oppositely, and the multiple filling structures 7 in each group are arranged one by one along the axis extension direction of the shell 1. By setting the filling structure 7, the present application reduces the internal volume of the shell 1 of the heat exchanger simulation device, reduces the water volume on the shell side of the heat exchanger simulation device, reduces the huge distortion caused by the scaled test, and improves the accuracy of the simulation.

[0052] Specifically, Figure 1 As shown, the shell 1 is a heat exchange shell, and is provided with a tube side inlet 2, a tube side outlet 3, a shell side outlet 5, and a shell side inlet 6. A C-shaped tube bundle 4 is arranged in the shell 1, and one end of the C-shaped tube bundle 4 is connected to the tube side inlet 2, and the other end of the C-shaped tube bundle 4 is connected to the tube side outlet 3. Figure 2 It can be seen that the cross section of the entire C-shaped tube bundle 4 is flat, and the diameter of the shell 1 needs to meet the long side requirement of the C-shaped tube bundle 4. Therefore, if the filling structure 7 is removed, there will be a huge space between the shell 1 and the C-shaped tube bundle 4 of the heat exchanger simulation device, which will cause a huge distortion in the scaled-down test. Figure 2 The orientation shown is an example and does not represent the actual design orientation. The first side of the C-shaped tube bundle 4 is the upper side of the C-shaped tube bundle 4, and the second side of the C-shaped tube bundle 4 is the lower side of the C-shaped tube bundle 4. A group of filling structures 7 are arranged on the upper side of the C-shaped tube bundle 4, and a group of filling structures 7 are arranged on the lower side of the C-shaped tube bundle 4. The multiple filling structures 7 in each group are arranged one by one along the extension direction of the axis of the shell 1. The layered building block installation method is adopted during installation, such as Figure 3 After the filling structure 7 is provided, the water volume in the housing 1 is the difference between the volume of the housing 1 and the volume of the filling structure 7, so as to meet the hydraulic characteristics under the simulation of the real situation.

[0053] Preferably, the filler in the filling structure 7 is water. The filling structure 7 adopts a closed hollow structure, which can achieve light weight and low total heat capacity, and reduce the influence on the shell side solid heat capacity ratio numerical simulation distortion. Filling a certain amount of water inside can ensure that there is a certain pressure inside the hot state, reduce the pressure difference between the inside and outside in the hot state, and enable it to withstand the high temperature and high pressure on the shell side during the test.

[0054] Preferably, Figure 4 As shown, the filling structure 7 includes a sealing shell 71 and reinforcing ribs 72 . The sealing shell 71 has a containing cavity in which the filler is placed; the reinforcing ribs 72 are arranged on the inner wall of the sealing shell 71 .

[0055] Specifically, Figure 3 and Figure 4 As shown, at least one wall shape of the sealed housing 71 is consistent with the wall shape of the housing 1. Figure 3 and Figure 4 As shown, since the shell 1 is a cylindrical structure, the two ends of the shell 1 are arc-shaped surfaces, so the wall shape of the sealing shell 71 of the filling structure 7 against the shell 1 is consistent with the wall shape of the shell 1. Figure 3 Exemplarily, the filling structure 7 located at the top of the housing 1 has two arc-shaped walls, including a top wall of the sealing shell 71 that fits the top inner wall of the housing 1 and a side wall of the sealing shell 71 that abuts against the side of the housing 1 (see Figure 2 ); The filling structure 7 at the bottom of the housing 1 has two arc-shaped walls, including a bottom wall of the sealing housing 71 that fits the bottom inner wall of the housing 1 and a side wall of the sealing housing 71 that abuts against the side of the housing 1 (see Figure 2 ); corresponding to the filling structure 7 at other positions, having an arc-shaped wall surface, which is the side wall of the sealing housing 71 against the side of the housing 1 (see Figure 2 The wall surface of the sealed housing 71 that contacts the housing 1 is an arc surface, and the other side walls are flat surfaces (see Figure 4 ).

[0056] Specifically, Figure 4 As shown, reinforcing ribs 72 are arranged on the plane side wall to make the sealed shell 71 have a certain pressure bearing capacity, and a certain amount of water is filled inside to ensure that there is a certain pressure inside in the hot state, reduce the pressure difference between the inside and outside in the hot state, and enable it to withstand the high temperature and high pressure on the shell side during the test. The arrangement of the reinforcing ribs 72 is as follows Figure 4 As shown, multiple reinforcing ribs 72 located on the same wall are arranged in parallel and spaced apart. The number of reinforcing ribs 72 is determined based on mechanical calculation and analysis, which should include strength, stability and plastic deformation. The qualified index of plastic deformation is that the deformation amount does not exceed 1% of the size of the filling structure 7 in the deformation direction, and shall not affect the installed instruments.

[0057] Preferably, Figure 4 As shown, in an optional embodiment, the filling structure 7 may further include an installation channel 73, the installation channel 73 passes through the sealed shell 71, the installation channel 73 and the sealed shell 71 are sealed and connected, and the installation channel 73 and the sealed shell 71 are not connected. The installation channel 73 is used to install a measuring instrument. The setting position of the installation channel 73 is determined according to the installation requirements of the measuring point. During installation, a hole is opened at a position corresponding to the sealed shell 71, and then a steel pipe is used to pass through the sealed shell 71, and is welded and sealed with the sealed shell 71. Specifically, the measuring instrument includes a measuring instrument protection sleeve, which is installed in the installation channel 73.

[0058] Preferably, Figure 2 and Figure 3 As shown, the filling structure 7 is provided in multiple layers along the axis extension direction of the shell 1, and each layer includes multiple filling structures 7. In this embodiment, each layer includes four filling structures 7, and the four filling structures 7 are symmetrically arranged on both sides of the C-shaped tube bundle 4. The heat exchanger simulation device also includes a fixed frame 8; the fixed frame 8 is connected to the shell 1, and the fixed frame 8 is arranged on the inner wall of the shell 1; the filling structure 7 is arranged on the fixed frame 8. The fixed frame 8 is arranged between two adjacent filling structures 7.

[0059] Specifically, the size of the fixed frame 8 is determined according to the layering and the outer dimensions of the filling structure 7. The fixed frame 8 is a steel section welded to the inner wall of the shell 1. During installation, the fixed frame 8 of the bottom filling structure 7 is welded first, and then the bottom filling structure 7 and the measuring instruments required for this layer are installed. From bottom to top, the fixed frame 8 and its corresponding filling structure 7 are installed layer by layer, and the measuring instruments of this layer are installed, and finally all the filling structures 7 are installed and fixed, so as to realize the precise control and simulation of the shell side water volume of the shell and tube C-shaped tube bundle 4 heat exchanger.

[0060] This embodiment also provides a design method for a shell and tube type C-shaped tube bundle 4 heat exchanger simulation device, which is used to design a shell and tube type C-shaped tube bundle 4 heat exchanger simulation device as described above, and the method includes:

[0061] S10: determining shell 1 data and tube bundle 4 data of the heat exchanger simulation device according to the simulation scale, shell data and tube bundle data of the full-size heat exchanger;

[0062] S20: determining the total volume of the two groups of filling structures 7 according to the reduction simulation criterion number and the shell 1 data of the heat exchanger simulation device;

[0063] S30: Based on user settings, determine the number of filling structures 7 in each group and the outer dimensions of each filling structure 7 according to the total volume of the two groups of filling structures 7;

[0064] S40: Obtain the heat capacity of the shell 1 of the heat exchanger simulation device, the total solid heat capacity of the filling structure 7, and a preset heat capacity ratio distortion rule, and determine the thickness of the sealed shell 71 of each filling structure 7;

[0065] S50: Calculating the water volume of each filling structure 7 according to the thickness of the sealing shell 71 of each filling structure 7 and based on a preset water volume calculation model;

[0066] S60: Install the filling structure 7 layer by layer based on a preset installation sequence.

[0067] The present application can ensure accurate simulation of the backflow suppression characteristics of the C-shaped tube bundle 4 while achieving accurate control and simulation of the shell side water volume of the shell and tube C-shaped tube bundle 4 heat exchanger simulation device, thereby reducing the distortion during the scaled-down simulation of this type of heat exchanger.

[0068] Specifically, the shell data and tube bundle data of the full-size heat exchanger in step S10, as well as the simulation ratio, are all preset values. The shell 1 size of the heat exchanger simulation device is scaled down on the shell size of the full-size heat exchanger according to the simulation ratio. In order to accurately simulate its backflow suppression characteristics, the heat transfer tubes of each layer of the C-shaped tube bundle must be simulated in the scaled-down test, that is, the number of rows of heat transfer tubes must be exactly the same as that of the full-size heat exchanger. Based on this requirement, according to the simulation ratio, the number of roots, the diameter and the length of each row of the C-shaped tube bundle 4 in the heat exchanger simulation device are determined according to the number of roots, the diameter and the length of each row of the C-shaped tube bundle in the full-size heat exchanger.

[0069] Preferably, step S20 determines the total volume of the two groups of filling structures 7 according to the reduction simulation criterion number and the shell data of the heat exchanger simulation device, including:

[0070] S21: Determine the shell side water volume of the heat exchanger simulation device based on the scaled simulation criterion number, the fluid flow rate, temperature difference and specific heat capacity of the full-size heat exchanger.

[0071] Specifically, the scaled simulation criterion number is a key parameter used to ensure that the model device maintains dynamic similarity when simulating a full-scale heat exchanger. It is necessary to ensure that the Reynolds number and Froude number between the heat exchanger simulator and the full-scale heat exchanger are consistent during runtime. This means that the fluid flow rate, temperature difference, and specific heat capacity in the heat exchanger simulator need to be scaled according to the similarity criterion number.

[0072] According to the simulation ratio of the design parameters of the heat exchanger simulator, the similar proportional relationship between the heat exchanger simulator and the full-scale heat exchanger can be determined. For example, if the simulation ratio is 1:4, the size of the heat exchanger simulator is 1 / 4 of the size of the full-scale heat exchanger, then the fluid flow, temperature difference and specific heat capacity in the heat exchanger simulator also need to be scaled according to the ratio of 1 / 4.

[0073] In this way, we can ensure that the fluid dynamics behavior in the heat exchanger simulator is similar to that in the full-scale heat exchanger, allowing accurate predictions of the shell-side water volume in the full-scale heat exchanger.

[0074] The shell side water volume can be calculated using the following formula:

[0075] V=m×ρ×(T 2 -T 1 ) / C p

[0076] Where V is the shell side water volume; m is the fluid mass flow rate; ρ is the fluid density; T 2 and T 1 is the fluid inlet and outlet temperature; C p is the specific heat capacity of the fluid.

[0077] To meet the scaled simulation criteria, we need to ensure that the Reynolds and Froude numbers between the heat exchanger simulator and the full-scale heat exchanger remain the same. This means that the fluid flow rate, temperature difference, and specific heat capacity in the heat exchanger simulator need to be scaled to the simulation scale.

[0078] In this embodiment, the fluid flow rate, temperature difference and specific heat capacity of the heat exchanger simulation device are obtained according to the fluid flow rate, temperature difference and specific heat capacity of the full-size heat exchanger, and the shell side water volume of the heat exchanger simulation device can be obtained according to the fluid flow rate, temperature difference and specific heat capacity of the heat exchanger simulation device and the above formula. The liquid density can be preset.

[0079] S22: Determine the total volume of the two groups of filling structures 7 according to the shell side water volume of the heat exchanger simulation device and the shell data of the heat exchanger simulation device.

[0080] Specifically, the total volume of the shell 1 of the heat exchanger simulation device is obtained according to the shell data of the heat exchanger simulation device, and the total volume of the two groups of filling structures 7 is obtained according to the difference between the shell side water volume of the heat exchanger simulation device and the total volume of the shell 1 of the heat exchanger simulation device.

[0081] Specifically, step S30 can determine the number of filling structures 7 in a group according to the user setting, and further obtain the outer dimensions of each filling structure 7 according to the total volume of the two groups of filling structures 7 and the number of filling structures 7 in a group. The user setting can be the number range of a group of filling structures 7 or the height of a single filling structure 7, where the height is the length of the filling structure 7 along the extension direction of the axis of the shell 1.

[0082] Preferably, step S40 obtains the heat capacity of the shell 1 of the heat exchanger simulation device, the total solid heat capacity of the filling structure 7, and a preset heat capacity ratio distortion rule, and determines the thickness of the sealed shell 71 of each filling structure 7, including:

[0083] S41: Calculate the distortion according to the heat capacity of the shell 1 of the heat exchanger simulation device and the total solid heat capacity of the filling structure 7.

[0084] Specifically, the heat capacity of the shell 1 of the heat exchanger simulation device can be determined by experimental data or the heat capacity value of a known material, and can be a preset value.

[0085] Specifically, the total solid heat capacity of the filling structure 7 is the sum of the heat capacities of each solid component in the filling structure 7 , which can be preset when the material of the filling structure 7 is known, or can be preset through experimental measurement.

[0086] Specifically, the ratio of the solid heat capacity of the heat exchanger simulation device to the solid heat capacity of the full-size heat exchanger is the same as the simulation ratio.

[0087] Specifically, the heat capacity ratio is the ratio of the total solid heat capacity of the filling structure 7 to the heat capacity of the shell 1 of the heat exchanger simulation device, and the distortion is the difference between the heat capacity ratio and 1 (or 100%).

[0088] S42: When the distortion meets the preset heat capacity ratio distortion rule, the total weight of the filling structure 7 is determined.

[0089] Specifically, in this embodiment, the distortion range is preset to ±5%. When the calculated distortion is within the preset distortion range, the total weight of the filling structure 7 is determined. If the calculated distortion exceeds ±5%, the weight of the filling structure 7 needs to be adjusted until the condition is met. The adjustment method may include increasing or decreasing the weight of certain components in the filling structure 7, or changing the material of the component to change its heat capacity.

[0090] Specifically, the material of the filling structure 7 is determined according to the determined total heat capacity of the filling structure 7. The density of the filling structure 7 is determined according to the material of the filling structure 7, and the total weight of the filling structure 7 is obtained according to the density of the filling structure 7 and the total volume of the filling structure 7.

[0091] S43 : Determine the thickness of the sealing shell 71 of each filling structure 7 according to the number of filling structures 7 and the outer dimensions of each filling structure 7 .

[0092] Specifically, the weight of each filling structure 7 is determined according to the number of filling structures 7, and the thickness of the sealing shell 71 of each filling structure 7 is determined according to the outer dimensions of each filling structure 7 and the weight of each filling structure 7. In specific implementation, the calculation can be performed by calling commercial mechanical design software.

[0093] Preferably, step S50 calculates the water volume of each filling structure 7 according to the thickness of the sealing shell 71 of each filling structure 7 based on a preset water volume calculation model, including:

[0094] S51: Acquire the hot maximum temperature and the corresponding external first pressure, the hot minimum temperature and the corresponding external second pressure of the filling structure 7.

[0095] Specifically, the hot maximum temperature of the filling structure 7 and the corresponding first external pressure, the hot minimum temperature and the corresponding second external pressure can be preset. MAX and the corresponding external first pressure P O,MAX , hot minimum temperature T MIN and the corresponding external second pressure P O,MIN .

[0096] S52: Determine the internal volume of the filling structure 7 according to the external dimensions of the filling structure 7 and the thickness of the sealed shell 71 of the filling structure 7. Specifically, determine the internal dimensions of the sealed shell 71 of the filling structure 7 according to the external dimensions of the filling structure 7 and the thickness of the sealed shell 71 of the filling structure 7, and obtain the internal volume of the filling structure 7 according to the internal dimensions of the sealed shell 71.

[0097] S53: According to the lowest hot temperature, calculate the first water filling amount corresponding to when the internal water is completely evaporated and in a saturated state at the lowest hot temperature. Specifically, in this embodiment, each filling structure 7 is set to have a first water filling amount corresponding to when the internal water is completely evaporated and in a saturated state at the lowest hot temperature. MIN The internal water is in a saturated state at this temperature. Based on the pre-set water / water vapor physical property library, the lowest hot temperature T MIN The physical parameters of water at this time are further calculated according to the internal volume of the filling structure 7 to obtain the lowest hot state temperature T MIN When the internal water is completely evaporated and in a saturated state, the corresponding water volume is Q 1 .

[0098] S54: Based on the preset minimum internal and external pressure difference, the hot state maximum temperature and the external first pressure, calculate the second water filling volume under the hot state maximum temperature and the internal maximum pressure. Specifically, the preset minimum internal and external pressure difference is the minimum difference ΔP between the external pressure and the internal pressure of the filling structure 7 at the hot state maximum temperature. MIN In this embodiment, each filling structure 7 is set at the highest hot temperature T MAX When the internal water is in an overheated state at this temperature, at this time, according to the preset minimum internal and external pressure difference, the internal maximum pressure of the filling structure 7 at the highest temperature in the hot state can be determined to be P IN,MAX =P O,MAX -ΔP MINBased on the preset water / water vapor physical property library, the highest temperature T in the hot state is obtained. MAX 、The maximum internal pressure is P IN,MAX The second water filling volume Q at the highest hot temperature and the highest internal pressure is calculated based on the physical parameters of the water at that time, and further according to the internal volume of the filling structure 7 2 .

[0099] S55: Determine the water filling amount in the filling structure 7 according to the first water filling amount and the second water filling amount.

[0100] Specifically, the water filling amount Q in the filling structure 7 is between Q 1 and Q 2 Between, i.e. Q 1 <Q<Q 2 .

[0101] The method of injecting water into the filling structure 7 is used to reduce the pressure difference between the inside and outside of the filling structure 7 in a hot state, thereby improving the external pressure bearing capacity of the filling structure 7.

[0102] Step S60 includes installing the fixed frame 8 and its corresponding filling structure 7 layer by layer from bottom to top, and installing the measuring instrument of the layer.

[0103] The filling structure 7 in the present application adopts a closed hollow structure, which can achieve lightweight and low total heat capacity, and reduce the impact on the simulation distortion of the solid heat capacity ratio number on the shell side. Reinforcement ribs 72 are set on the inner wall of the filling structure 7, so that the sealed shell 71 of the filling structure 7 has a certain pressure-bearing capacity, and a certain amount of water is filled inside to ensure that there is a certain pressure inside the hot state, reduce the pressure difference between the inside and outside in the hot state, and enable it to withstand the high temperature and high pressure on the shell side during the test. The filling structure 7 of the present application adopts a layered building block installation method, and the filling structure 7 is provided with an installation channel 73, which is convenient for the measuring instrument to pass through the filling structure 7 to realize the measurement of the data of the tube bundle 4 zone, and realize the coupling installation with the measuring point.

[0104] In the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.

[0105] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The description and examples are to be considered exemplary only.

[0106] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A shell and tube C-tube bundle heat exchanger simulation device, characterized in that: include: A shell, wherein the shell is a hollow structure, and a C-shaped tube bundle is arranged in the shell; A filling structure, wherein the filling structure is disposed in the shell and connected to the shell; The filling structures are arranged in two groups, one group of the filling structures is arranged on the first side of the C-shaped tube bundle, and the other group of the filling structures is arranged on the second side of the C-shaped tube bundle. The two groups of the filling structures are arranged opposite to each other, and the multiple filling structures in each group are arranged one by one along the axial extension direction of the shell.

2. A shell and tube C-shaped tube bundle heat exchanger simulation device according to claim 1, characterized in that: The filler in the filling structure is water.

3. A shell and tube C-tube bundle heat exchanger simulation device according to claim 1, characterized in that: The filling structure comprises a sealing shell and reinforcing ribs, wherein the sealing shell has a containing cavity, and a filler is placed in the containing cavity; The reinforcing ribs are arranged on the inner wall of the sealing shell.

4. A shell and tube type C-tube bundle heat exchanger simulation device according to claim 3, characterized in that: The shape of at least one wall surface of the sealed housing is consistent with the shape of the wall surface of the housing.

5. The shell and tube C-tube bundle heat exchanger simulation device according to claim 1, characterized in that: The filling structure further comprises a mounting channel, wherein the mounting channel penetrates through the sealing shell, the mounting channel and the sealing shell are sealed and connected to each other, and the mounting channel and the sealing shell are not in communication.

6. A shell and tube C-shaped tube bundle heat exchanger simulation device according to claim 1, characterized in that: The heat exchanger simulation device also includes a fixed frame; The fixing frame is connected to the shell, and the fixing frame is arranged on the inner wall of the shell; The filling structure is arranged on the fixing frame.

7. A design method for a shell and tube C-tube bundle heat exchanger simulation device, characterized in that: A method for designing a shell and tube C-shaped tube bundle heat exchanger simulation device according to any one of claims 1 to 6, comprising: Determine the shell data and tube bundle data of the heat exchanger simulation device according to the simulation scale, shell data and tube bundle data of the full-size heat exchanger; Determine the total volume of the two groups of filling structures according to the reduction simulation criterion number and the shell data of the heat exchanger simulation device; Based on user settings, determining the number of the filling structures in each group and the outer dimensions of each filling structure according to the total volume of the two groups of filling structures; Obtaining the shell heat capacity of the heat exchanger simulation device, the total solid heat capacity of the filling structure and a preset heat capacity ratio distortion rule, and determining the thickness of the sealed shell of each filling structure; Calculating the water filling volume of each of the filling structures according to the thickness of the sealed shell of each of the filling structures and based on a preset water volume calculation model; Based on a preset installation sequence, the filling structure is installed layer by layer.

8. The design method of a shell and tube C-tube bundle heat exchanger simulation device according to claim 7, characterized in that: According to the reduction simulation criterion number and the shell data of the heat exchanger simulation device, the total volume of the two groups of filling structures is determined, including: Determine the shell side water volume of the heat exchanger simulation device based on the scaled simulation criteria, fluid flow rate, temperature difference and specific heat capacity of the full-size heat exchanger; The total volume of the two groups of filling structures is determined according to the shell side water volume of the heat exchanger simulation device and the shell data of the heat exchanger simulation device.

9. The design method of a shell and tube C-tube bundle heat exchanger simulation device according to claim 7, characterized in that: Obtaining the shell heat capacity of the heat exchanger simulation device, the total solid heat capacity of the filling structure and a preset heat capacity ratio distortion rule, and determining the thickness of the sealed shell of each filling structure, including: Calculating the degree of distortion according to the shell heat capacity of the heat exchanger simulation device and the total solid heat capacity of the filling structure; When the distortion meets the preset heat capacity ratio distortion rule, determining the total weight of the filling structure; The thickness of the sealed shell of each filling structure is determined according to the number of the filling structures and the outer dimensions of each filling structure.

10. The design method of a shell and tube C-tube bundle heat exchanger simulation device according to claim 7, characterized in that: According to the thickness of the sealed shell of each filling structure, based on a preset water volume calculation model, the water volume of each filling structure is calculated, including: Obtaining the hot-state maximum temperature and the corresponding external first pressure, the hot-state minimum temperature and the corresponding external second pressure of the filling structure; determining the internal volume of the filling structure according to the outer dimensions of the filling structure and the thickness of the sealed shell of the filling structure; According to the hot state minimum temperature, a first water filling amount corresponding to when the internal water is just completely evaporated and in a saturated state at the hot state minimum temperature is calculated; Based on the preset minimum internal and external pressure difference, the hot state maximum temperature and the external first pressure, the second water filling volume under the hot state maximum temperature and the internal maximum pressure is calculated; The water filling amount in the filling structure is determined according to the first water filling amount and the second water filling amount.

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