A method, device, equipment and storage medium for optimizing heat exchange performance

Abstract

The present application discloses a method, device, equipment and storage medium for optimizing heat exchange performance, which relates to the field of heat exchange technology, including: determining the target parameter calculation rules based on the target state of the shell-side fluid in a double-divided shell and tube heat exchanger, and obtaining the first fluid parameter in combination with the first heat exchanger geometric parameter, the shell-side fluid mass flow rate and the target double-divided correction factor. Determine the second fluid parameter by the first fluid parameter, the shell-side fluid mass flow rate, attribute information and geometric parameter, and then determine the shell-side fluid heat transfer film coefficient in combination with the preset influence coefficient. Determine the tube-side fluid heat transfer film coefficient according to the tube-side fluid attribute information, mass flow rate and the second heat exchanger geometric parameter. Finally, determine the target heat transfer coefficient using the preset rules, tube-side and shell-side heat transfer film coefficients to trigger the heat exchange performance optimization operation. In this way, the present application can effectively improve the accuracy and reliability of the determined heat transfer coefficient, thereby improving the accuracy of performance optimization.

Description

Technical Field

[0001] The present invention relates to the field of heat exchange technology, and in particular to a heat exchange performance optimization method, device, equipment and storage medium. Background Art

[0002] Heat exchangers are key equipment for heat recovery and conversion. They play a vital role in industries such as chemical, pharmaceutical, petroleum, air conditioning and energy. Their efficiency directly affects the energy efficiency of the entire system. Therefore, calculating the heat transfer coefficient of heat exchangers is the core of optimizing design and improving energy efficiency.

[0003] However, in the prior art, the heat transfer performance optimization methods of double-divided flow shell and tube heat exchangers are mostly empirical formulas or theoretical calculations only for simple geometric shapes, which fail to fully consider the influence of the double-divided flow structure and the fluid type in the tube / shell side on the fluid flow and heat transfer, resulting in insufficient optimization of heat transfer performance parameters such as heat transfer efficiency.

[0004] Therefore, how to accurately calculate the heat transfer coefficient of the double-split shell and tube heat exchanger by comprehensively considering the geometric characteristics of the heat exchanger and the actual flow of the fluid in the tube / shell side to achieve heat transfer performance optimization is a technical problem that needs to be solved urgently. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a method, device, equipment and storage medium for optimizing heat exchange performance, which can accurately calculate the heat transfer coefficient of a double-split shell and tube heat exchanger by comprehensively considering the geometric characteristics of the heat exchanger and the actual flow of the fluid in the tube / shell side, so as to optimize the heat exchange performance. The specific scheme is as follows:

[0006] In a first aspect, the present application provides a method for optimizing heat exchange performance, comprising:

[0007] Determine a target parameter calculation rule corresponding to the shell-side fluid based on a target state of the shell-side fluid in a double-split shell and tube heat exchanger, and determine a corresponding first fluid parameter using the target parameter calculation rule, a first heat exchanger geometric parameter, a shell-side fluid mass flow rate, and a target double-split correction factor;

[0008] Determine a corresponding second fluid parameter based on the first fluid parameter, the shell-side fluid mass flow rate, shell-side fluid property information, and the first heat exchanger geometric parameter, and determine a corresponding shell-side fluid heat transfer film coefficient based on the second fluid parameter and a preset influence coefficient;

[0009] Determine a tube-side fluid heat transfer film coefficient corresponding to the tube-side fluid based on the tube-side fluid property information, the tube-side fluid mass flow rate and the second heat exchanger geometric parameters of the tube-side fluid in the double-split shell and tube heat exchanger;

[0010] The target heat transfer coefficient is determined by using a preset heat transfer coefficient calculation rule, the tube-side fluid heat transfer film coefficient, and the shell-side fluid heat transfer film coefficient, so as to trigger a heat transfer performance optimization operation of the double-split shell and tube heat exchanger based on the target heat transfer coefficient.

[0011] Optionally, the target state of the shell-side fluid in the double-split shell and tube heat exchanger is used to determine a target parameter calculation rule corresponding to the shell-side fluid, and the target parameter calculation rule, the first heat exchanger geometric parameters, the shell-side fluid mass flow rate and the target double-split correction factor are used to determine the corresponding first fluid parameter, including:

[0012] If the target state of the shell-side fluid in the double-split shell and tube heat exchanger indicates that the shell-side fluid is a thermal fluid, a first preset parameter calculation rule corresponding to the thermal fluid is used as a target parameter calculation rule;

[0013] If the target state indicates that the shell-side fluid is a cold fluid, a second preset parameter calculation rule corresponding to the cold fluid is used as the target parameter calculation rule;

[0014] Obtaining the tube inner diameter, shell inner diameter, tube core diameter, number of heat exchange tubes, number of heat exchangers in parallel, and baffle spacing of the double-dividing shell and tube heat exchanger to complete the corresponding first geometric parameter acquisition operation;

[0015] Analyze the tube arrangement of the double-split shell and tube heat exchanger to obtain analysis results;

[0016] If the analysis result indicates that the tube arrangement is a triangular arrangement, a first preset dual-flow split correction factor corresponding to the triangular arrangement is used as a target dual-flow split correction factor;

[0017] If the analysis result indicates that the tube arrangement is a square arrangement, a second preset dual-flow split correction factor corresponding to the square arrangement is used as the target dual-flow split correction factor;

[0018] Calculation is performed based on the tube inner diameter, the shell inner diameter, the tube core diameter, the number of heat exchange tubes, the number of heat exchangers in parallel, the baffle spacing, the target parameter calculation rule, the shell-side fluid mass flow rate and the target double-division correction factor to obtain the corresponding first fluid parameter.

[0019] Optionally, determining the corresponding second fluid parameter based on the first fluid parameter, the shell-side fluid mass flow rate, shell-side fluid property information, and the first heat exchanger geometric parameter includes:

[0020] Obtaining the specific heat capacity, relative molecular mass, viscosity and thermal conductivity of the shell-side fluid to complete the corresponding first attribute acquisition operation;

[0021] Calculation is performed based on the first fluid parameter, the shell-side fluid mass flow rate, the shell-side fluid specific heat capacity, the shell-side fluid relative molecular mass, the shell-side fluid viscosity, the shell-side fluid thermal conductivity and the first heat exchanger geometric parameters to obtain the corresponding second fluid parameter.

[0022] Optionally, determining the corresponding shell-side fluid heat transfer film coefficient based on the second fluid parameter and a preset influence coefficient includes:

[0023] Obtain the baffle leakage influence coefficient, the fluid flow influence coefficient at the circular segment baffle, and the tube bundle bypass influence coefficient to complete the corresponding influence coefficient collection operation;

[0024] Based on the second fluid parameter, the baffle leakage influence coefficient, the fluid flow influence coefficient at the segment-shaped baffle, and the tube bundle bypass influence coefficient, calculation is performed to obtain the corresponding shell-side fluid heat transfer film coefficient.

[0025] Optionally, obtaining the baffle leakage influence coefficient, the fluid flow influence coefficient at the circular segment baffle, and the tube bundle bypass influence coefficient includes:

[0026] Calculating based on the tube inner diameter, the shell inner diameter, the tube core diameter, the number of heat exchange tubes, the baffle cutting ratio, and the target double-division correction factor to obtain the fluid flow influence coefficient at the circular segment-shaped baffle;

[0027] Calculating based on the tube inner diameter, the shell inner diameter, the tube core diameter, the number of heat exchange tubes, the baffle cutting ratio, and the clearance data between the tube side and the baffle to respectively determine a first radial clearance area between the shell side and the baffle, and a second radial clearance area between the tube side and the baffle;

[0028] Calculating based on the first radial gap area, the second radial gap area and the target double-flow split correction factor to obtain a corresponding baffle leakage influence coefficient;

[0029] A calculation is performed based on the tube inner diameter, the shell inner diameter, the tube core diameter, the number of heat exchange tubes, the baffle spacing, and the target double-split correction factor to obtain the tube bundle bypass flow influence coefficient.

[0030] Optionally, determining the tube-side fluid heat transfer film coefficient corresponding to the tube-side fluid in the double-split shell and tube heat exchanger based on the tube-side fluid property information, the tube-side fluid mass flow rate and the second heat exchanger geometric parameters includes:

[0031] Obtain the specific heat capacity, relative molecular mass, viscosity and thermal conductivity of the tube-side fluid to complete the corresponding second attribute acquisition operation;

[0032] Obtain the number of tube passes of the heat exchanger and the corresponding tube length and tube inner diameter to complete the corresponding second geometric parameter acquisition operation;

[0033] A calculation is performed based on the specific heat capacity of the tube-side fluid, the relative molecular mass of the tube-side fluid, the viscosity of the tube-side fluid, the thermal conductivity of the tube-side fluid, the mass flow rate of the tube-side fluid, the number of tube passes, the tube length and the inner diameter of the tube to obtain a tube-side fluid heat transfer film coefficient corresponding to the tube-side fluid.

[0034] Optionally, the determining of the target heat transfer coefficient by using a preset heat transfer coefficient calculation rule, the tube-side fluid heat transfer film coefficient, and the shell-side fluid heat transfer film coefficient includes:

[0035] Taking the reciprocals of the tube-side fluid heat transfer film coefficient and the shell-side fluid heat transfer film coefficient respectively to obtain a first reciprocal value and a second reciprocal value;

[0036] The first reciprocal value, the second reciprocal value and the pipe wall fluid fouling thermal resistance are added, and the reciprocal of the added result is taken to obtain a target heat transfer coefficient.

[0037] In a second aspect, the present application provides a heat exchange performance optimization device, comprising:

[0038] a parameter determination module, for determining a target parameter calculation rule corresponding to the shell-side fluid based on a target state of the shell-side fluid in a double-split shell and tube heat exchanger, and determining a corresponding first fluid parameter using the target parameter calculation rule, a first heat exchanger geometric parameter, a shell-side fluid mass flow rate, and a target double-split correction factor;

[0039] a first coefficient determination module, configured to determine a corresponding second fluid parameter based on the first fluid parameter, the shell-side fluid mass flow rate, shell-side fluid property information, and the first heat exchanger geometric parameter, and to determine a corresponding shell-side fluid heat transfer film coefficient based on the second fluid parameter and a preset influence coefficient;

[0040] A second coefficient determination module, for determining a tube-side fluid heat transfer film coefficient corresponding to the tube-side fluid in the double-split shell and tube heat exchanger based on the tube-side fluid property information, the tube-side fluid mass flow rate and the second heat exchanger geometric parameters;

[0041] The heat transfer coefficient determination module is used to determine the target heat transfer coefficient by using the preset heat transfer coefficient calculation rule, the tube-side fluid heat transfer film coefficient and the shell-side fluid heat transfer film coefficient, so as to trigger the heat transfer performance optimization operation of the double-split shell and tube heat exchanger based on the target heat transfer coefficient.

[0042] In a third aspect, the present application provides an electronic device, including:

[0043] Memory, used to store computer programs;

[0044] The processor is used to execute the computer program to implement the aforementioned heat exchange performance optimization method.

[0045] In a fourth aspect, the present application provides a computer-readable storage medium for storing a computer program; wherein, when the computer program is executed by a processor, the aforementioned heat exchange performance optimization method is implemented.

[0046] In the present application, a target parameter calculation rule corresponding to the shell-side fluid is determined based on the target state of the shell-side fluid in a double-split shell and tube heat exchanger, and the corresponding first fluid parameter is determined using the target parameter calculation rule, the first heat exchanger geometric parameter, the shell-side fluid mass flow rate and the target double-split correction factor; the corresponding second fluid parameter is determined based on the first fluid parameter, the shell-side fluid mass flow rate, the shell-side fluid property information and the first heat exchanger geometric parameter, and the corresponding shell-side fluid heat transfer film coefficient is determined based on the second fluid parameter and the preset influence coefficient; the tube-side fluid heat transfer film coefficient corresponding to the tube-side fluid is determined based on the tube-side fluid property information, the tube-side fluid mass flow rate and the second heat exchanger geometric parameter of the tube-side fluid in the double-split shell and tube heat exchanger; the target heat transfer coefficient is determined using the preset heat transfer coefficient calculation rule, the tube-side fluid heat transfer film coefficient and the shell-side fluid heat transfer film coefficient to trigger the heat exchange performance optimization operation of the double-split shell and tube heat exchanger based on the target heat transfer coefficient. As can be seen from the above, the target parameter calculation rules are determined based on the target state of the shell-side fluid in the double-divided shell and tube heat exchanger, and the first fluid parameters are obtained by combining the first heat exchanger geometric parameters, the shell-side fluid mass flow rate and the target double-divided correction factor. The second fluid parameters are determined by the first fluid parameters, the shell-side fluid mass flow rate, the property information and the geometric parameters, and the shell-side fluid heat transfer film coefficient is determined in combination with the preset influence coefficient. The tube-side fluid heat transfer film coefficient is determined according to the tube-side fluid property information, the mass flow rate and the second heat exchanger geometric parameters. Finally, the target heat transfer coefficient is determined using the preset rules, the tube-side and shell-side heat transfer film coefficients to trigger the heat exchange performance optimization operation. In this way, the present application can effectively improve the accuracy and reliability of the determined heat transfer coefficient under the conditions of combining the geometric characteristics of the heat exchanger and the actual flow of the fluid in the tube / shell side, thereby improving the accuracy of performance optimization. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0048] Figure 1 A flow chart of a heat exchange performance optimization method disclosed in this application;

[0049] Figure 2 This is a schematic diagram of the structure of a heat exchange performance optimization device disclosed in this application;

[0050] Figure 3 This is a structural diagram of a heat exchange performance optimization device disclosed in this application. DETAILED DESCRIPTION

[0051] 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 only 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.

[0052] In the prior art, the heat transfer performance optimization methods of double-divided-flow shell-and-tube heat exchangers are mostly empirical formulas or theoretical calculations based only on simple geometric shapes, which fail to fully consider the influence of the double-divided-flow structure and the type of fluid in the tube / shell side on the fluid flow and heat transfer, resulting in insufficient optimization of heat transfer performance parameters such as heat transfer efficiency. To this end, the present application provides a heat transfer performance optimization method, which accurately calculates the heat transfer coefficient of a double-divided-flow shell-and-tube heat exchanger by comprehensively considering the geometric characteristics of the heat exchanger and the actual flow of the fluid in the tube / shell side, so as to achieve heat transfer performance optimization.

[0053] See also Figure 1 As shown, an embodiment of the present invention discloses a method for optimizing heat exchange performance, comprising:

[0054] Step S11, based on the target state of the shell-side fluid in the double-split shell and tube heat exchanger, determine the target parameter calculation rule corresponding to the shell-side fluid, and use the target parameter calculation rule, the first heat exchanger geometric parameters, the shell-side fluid mass flow rate and the target double-split correction factor to determine the corresponding first fluid parameter.

[0055] First of all, it should be noted that in a double-split shell and tube heat exchanger, the flow paths and distribution of the cold fluid and the hot fluid in the shell will be affected to varying degrees by the temperature difference. The different flow characteristics and temperature distribution of the cold fluid and the hot fluid are directly related to the heat transfer capacity between the shell fluid and the heat exchange wall. Therefore, in order to accurately evaluate and optimize the performance of the heat exchanger under different operating conditions, it is necessary to distinguish between the cold fluid and the hot fluid for targeted calculations to ensure that the influence of various complex factors on heat transfer can be fully considered, and the accuracy and reliability of the calculation results can be improved.

[0056] In a specific embodiment, if the target state of the shell-side fluid in the double-split shell and tube heat exchanger indicates that the shell-side fluid is a hot fluid, the first preset parameter calculation rule corresponding to the hot fluid is used as the target parameter calculation rule. In another specific embodiment, if the target state indicates that the shell-side fluid is a cold fluid, the second preset parameter calculation rule corresponding to the cold fluid is used as the target parameter calculation rule.

[0057] In this embodiment, the inner diameter of the tube, the inner diameter of the shell, the core diameter of the tube, the number of heat exchange tubes, the number of heat exchangers in parallel, and the spacing between baffles of the double-divided-flow shell and tube heat exchanger are obtained to complete the corresponding first geometric parameter acquisition operation. It can be understood that these geometric parameters are crucial for the subsequent calculation of the heat transfer of the fluid. For example, the inner diameter of the tube and the inner diameter of the shell directly affect the flow space of the fluid and the contact area with the tube wall, the core diameter of the tube is related to the arrangement and layout of the heat exchange tubes, the number of heat exchange tubes determines the scale of the area that can participate in the heat exchange, the number of heat exchangers in parallel involves the overall expansion of the heat exchange capacity, and the spacing between baffles has an important influence on the flow path and disturbance degree of the shell-side fluid.

[0058] At the same time, due to the different tube arrangement modes, the flow characteristics of the fluid in the tube will change, thereby affecting the heat transfer performance of the entire heat exchanger. Therefore, the tube arrangement mode of the double-split shell and tube heat exchanger is analyzed to obtain an analysis result; if the analysis result shows that the tube arrangement mode is a triangular arrangement, the first preset double-split correction factor corresponding to the triangular arrangement is used as the target double-split correction factor. If the analysis result shows that the tube arrangement mode is a square arrangement, the second preset double-split correction factor corresponding to the square arrangement is used as the target double-split correction factor.

[0059] Finally, calculation is performed based on the tube inner diameter, the shell inner diameter, the tube core diameter, the number of heat exchange tubes, the number of heat exchangers in parallel, the baffle spacing, the target parameter calculation rule, the shell-side fluid mass flow rate and the target double-division correction factor to obtain the corresponding first fluid parameter.

[0060] Step S12: determining corresponding second fluid parameters based on the first fluid parameters, the shell-side fluid mass flow rate, shell-side fluid property information and the first heat exchanger geometric parameters, and determining corresponding shell-side fluid heat transfer film coefficient based on the second fluid parameters and a preset influence coefficient.

[0061] After obtaining the first fluid parameter, the specific heat capacity of the shell-side fluid, the relative molecular mass of the shell-side fluid, the viscosity of the shell-side fluid and the thermal conductivity of the shell-side fluid are obtained to complete the corresponding first attribute collection operation. It should be noted that the specific heat capacity of the shell-side fluid reflects the heat absorbed or released by the unit mass of the shell-side fluid when the temperature increases or decreases by 1°C; the relative molecular mass of the shell-side fluid is related to the physical and chemical properties of the fluid, affecting the flow behavior and heat transfer performance of the fluid in the heat exchanger; the viscosity of the shell-side fluid determines the friction force inside the fluid; the thermal conductivity of the shell-side fluid describes the ability of the shell-side fluid to conduct heat, which is directly related to the speed of heat transfer in the fluid. In this embodiment, after the first attribute collection is completed, the corresponding second fluid parameter is calculated based on the first fluid parameter, the mass flow rate of the shell-side fluid, the specific heat capacity of the shell-side fluid, the relative molecular mass of the shell-side fluid, the viscosity of the shell-side fluid, the thermal conductivity of the shell-side fluid and the first heat exchanger geometric parameters to obtain the corresponding second fluid parameter.

[0062] In this embodiment, it is necessary to obtain the baffle leakage influence coefficient, the fluid flow influence coefficient at the circular segment baffle, and the tube bundle bypass influence coefficient to complete the corresponding influence coefficient collection operation.

[0063] Specifically, the fluid flow influence coefficient at the circular segment-shaped baffle is calculated based on the tube inner diameter, the shell inner diameter, the tube core diameter, the number of heat exchange tubes, the baffle cutting ratio and the target double-division correction factor to obtain the fluid flow influence coefficient at the circular segment-shaped baffle. It should be noted that the baffle cutting ratio is an important factor affecting the fluid flow state at the circular segment-shaped baffle, and different cutting ratios will cause changes in the flow direction, speed, etc. of the fluid in this area.

[0064] For the baffle leakage influence coefficient, calculations are performed based on the tube inner diameter, the shell inner diameter, the tube core diameter, the number of heat exchange tubes, the baffle cutting ratio, and the gap data between the tube side and the baffle to respectively determine the first radial gap area between the shell side and the baffle, and the second radial gap area between the tube side and the baffle. Further, calculations are performed based on the first radial gap area, the second radial gap area, and the target double-diversion correction factor to obtain the corresponding baffle leakage influence coefficient. It is understandable that the gap between the tube side and the baffle will cause fluid leakage. When the fluid flows in the tube side, a portion of the fluid will leak through this gap to other areas, changing the normal flow path and distribution of the fluid. Since the leaked fluid does not undergo sufficient heat exchange along the expected path, this leakage phenomenon will have a negative impact on the heat transfer efficiency.

[0065] The tube bundle bypass flow influence coefficient is calculated based on the tube inner diameter, the shell inner diameter, the tube core diameter, the number of heat exchange tubes, the baffle spacing, and the target double-diversion correction factor to obtain the tube bundle bypass flow influence coefficient. It should be emphasized that in this embodiment, when the baffle spacing is small, the fluid frequently changes its flow direction in the shell, which intensifies the turbulence of the fluid, which is conducive to improving the heat transfer coefficient. However, too small a baffle spacing will increase the flow resistance of the fluid, resulting in an increase in the power required for the fluid to pass through the heat exchanger, which may increase energy consumption.

[0066] Furthermore, calculation is performed based on the second fluid parameter, the baffle leakage influence coefficient, the fluid flow influence coefficient at the circular baffle, and the tube bundle bypass influence coefficient to obtain the corresponding shell-side fluid heat transfer film coefficient. Moreover, the shell-side fluid heat transfer film coefficient is an important indicator that describes the heat transfer capacity between the shell-side fluid and the heat exchange wall in a shell and tube heat exchanger, and it can intuitively reflect the heat transfer performance of the shell-side fluid under the current heat exchanger structure and operating conditions.

[0067] Step S13, determining the tube-side fluid heat transfer film coefficient corresponding to the tube-side fluid in the double-split shell and tube heat exchanger based on the tube-side fluid property information, the tube-side fluid mass flow rate and the second heat exchanger geometric parameters.

[0068] In this embodiment, the specific heat capacity of the tube-side fluid, the relative molecular mass of the tube-side fluid, the viscosity of the tube-side fluid and the thermal conductivity of the tube-side fluid are first obtained to complete the corresponding second attribute collection operation. It should be emphasized that the attribute information related to the shell-side fluid and the tube-side fluid is different. The shell-side fluid and the tube-side fluid are in different spaces of the heat exchanger, and there are differences in the environment they are in contact with and the channel structure they flow through. Therefore, even if it is the same substance, under different flow conditions in the shell and tube, its specific heat capacity, relative molecular mass, viscosity and thermal conductivity and other properties will show different values ​​due to the influence of different temperatures, pressures, flow rates and interactions with the wall. These attribute information can respectively reflect their heat transfer capacity and flow characteristics at their respective locations.

[0069] After obtaining the second attribute, the number of tube passes of the heat exchanger and the corresponding tube length and inner diameter of the tube are further obtained to complete the corresponding second geometric parameter acquisition operation. Among them, the number of tube passes of the heat exchanger determines the flow path and flow length of the tube fluid in the heat exchanger. A larger number of tube passes means that the tube fluid has a longer journey in the heat exchanger and has more opportunities to contact the heat exchange tube wall; the tube length directly affects the heat exchange area between the tube fluid and the heat exchange tube wall. A longer tube length can provide a larger heat exchange area, which is conducive to heat transfer; the inner diameter of the tube plays a key role in the flow velocity and flow rate of the tube fluid. A smaller inner diameter of the tube will increase the flow velocity of the tube fluid, thereby changing the flow state and heat transfer characteristics of the fluid.

[0070] After completing the above-mentioned property collection and geometric parameter collection, it is necessary to calculate the tube-side fluid heat transfer film coefficient, which is a key indicator for measuring the heat transfer efficiency between the tube-side fluid and the heat exchange tube wall in a shell and tube heat exchanger. This embodiment is based on the specific heat capacity of the tube-side fluid, the relative molecular mass of the tube-side fluid, the viscosity of the tube-side fluid, the thermal conductivity of the tube-side fluid, the mass flow rate of the tube-side fluid, the number of tube passes, the tube length, and the inner diameter of the tube to obtain the tube-side fluid heat transfer film coefficient corresponding to the tube-side fluid. Among them, the mass flow rate of the tube-side fluid reflects the mass of the fluid passing through the tube per unit time.

[0071] Step S14: determine a target heat transfer coefficient by using a preset heat transfer coefficient calculation rule, the tube-side fluid heat transfer film coefficient, and the shell-side fluid heat transfer film coefficient, so as to trigger a heat transfer performance optimization operation of the double-split shell and tube heat exchanger based on the target heat transfer coefficient.

[0072] In this embodiment, the reciprocal of the tube-side fluid heat transfer film coefficient and the shell-side fluid heat transfer film coefficient are taken respectively to obtain a first reciprocal value and a second reciprocal value. It should be noted that in the heat transfer process, the reciprocal of the heat transfer film coefficient is related to the thermal resistance. The tube-side fluid heat transfer film coefficient and the shell-side fluid heat transfer film coefficient respectively reflect the heat transfer capacity between the tube-side and shell-side fluids and the heat exchange wall. After taking the reciprocal, the obtained value is intrinsically related to the thermal resistance of the fluid in each process.

[0073] Furthermore, the first reciprocal value, the second reciprocal value and the wall fluid fouling thermal resistance are added, and the reciprocal of the sum is taken to obtain the target heat transfer coefficient. Among them, the wall fluid fouling thermal resistance is a factor that cannot be ignored. It is caused by impurities such as dirt that may accumulate on the wall of the heat exchanger during long-term operation. These dirt will increase the resistance to heat transfer and reduce the efficiency of the heat exchanger. Different fluid compositions, operating conditions, and the use time of the heat exchanger will affect the size of the wall fluid fouling thermal resistance, so it needs to be taken into account when calculating the target heat transfer coefficient.

[0074] After obtaining the target heat transfer coefficient, the heat transfer performance optimization operation of the double-split shell and tube heat exchanger can be triggered based on this. This optimization operation has many implementation paths. On the one hand, the operating parameters of the heat exchanger can be adjusted according to the deviation between the target heat transfer coefficient and the expected value. For example, if the target heat transfer coefficient is lower than the expected value, it may mean that the heat transfer efficiency of the heat exchanger is not ideal. At this time, you can consider adjusting the flow rate of the tube-side fluid or the shell-side fluid. By increasing the flow rate, the relative velocity between the fluid and the heat exchange wall can be increased, and the convective heat transfer effect can be enhanced, which may increase the target heat transfer coefficient.

[0075] On the other hand, the target heat transfer coefficient can also provide guidance for the structural improvement of the heat exchanger. If it is found that the target heat transfer coefficient is seriously affected by the thermal resistance of the tube wall fouling, it is possible to consider improving the cleaning mechanism of the heat exchanger or adding an anti-fouling structure to the heat exchanger design. For the design of the tube side and shell side, if the target heat transfer coefficient shows that there is a bottleneck in the heat transfer in these two processes, the number of tube passes, shell side structure, baffle design, etc. can be optimized. For example, the angle or spacing of the baffles can be adjusted to change the flow path and disturbance degree of the fluid in the shell side to increase the shell side fluid heat transfer film coefficient, thereby optimizing the target heat transfer coefficient.

[0076] As can be seen from the above, the target parameter calculation rules are determined based on the target state of the shell-side fluid in the double-divided shell and tube heat exchanger, and the first fluid parameters are obtained by combining the first heat exchanger geometric parameters, the shell-side fluid mass flow rate and the target double-divided correction factor. The second fluid parameters are determined by the first fluid parameters, the shell-side fluid mass flow rate, the property information and the geometric parameters, and the shell-side fluid heat transfer film coefficient is determined in combination with the preset influence coefficient. The tube-side fluid heat transfer film coefficient is determined according to the tube-side fluid property information, the mass flow rate and the second heat exchanger geometric parameters. Finally, the target heat transfer coefficient is determined using the preset rules, the tube-side and shell-side heat transfer film coefficients to trigger the heat exchange performance optimization operation. In this way, the present application can effectively improve the accuracy and reliability of the determined heat transfer coefficient under the conditions of combining the geometric characteristics of the heat exchanger and the actual flow of the fluid in the tube / shell side, thereby improving the accuracy of performance optimization.

[0077] The technical solution provided in the present application is described in detail below in conjunction with a specific process of calculating the target heat transfer coefficient of a double-split shell and tube heat exchanger.

[0078] Specifically, in this embodiment, the shell-side fluid state (ie, the target state) is first determined. When the shell-side fluid state is different, the calculation method is also different. If the shell-side fluid state is a hot fluid, the corresponding target parameter calculation formula is as follows:

[0079] ;

[0080] Where A is the first fluid parameter, D o is the inner diameter of the tube (unit: m), D s is the inner diameter of the shell (unit: m), P t is the tube core diameter (unit: m), N is the number of heat exchange tubes, is the double shunt effect correction factor (i.e., the target double shunt correction factor). It should be noted that Related to the tube arrangement of the double split shell and tube heat exchanger, when the tube arrangement is a triangle arrangement, =3.464; when the pipe arrangement is a square arrangement, =4.0. In addition, the calculation formula of the parameter n is as follows:

[0081] ;

[0082] Where N s is the number of heat exchangers in parallel, F m is the shell side fluid mass flow rate (unit: kg / s), S m is the flow area near the center of the shell side fluid (unit: m 2 ), and S m The calculation formula is as follows:

[0083] ;

[0084] Where b p is the baffle spacing (unit: m).

[0085] On the contrary, if the shell side fluid state is cold fluid, the corresponding target parameter calculation formula is as follows:

[0086] ;

[0087] After obtaining A according to the corresponding target parameter calculation formula, determine B (i.e., the second fluid parameter). B is a performance parameter calculated based on the geometric dimensions of the heat exchanger. Its calculation formula is as follows:

[0088] ;

[0089] In the formula, C p is the shell-side fluid specific heat capacity (unit: ), MW is the shell side fluid mass flow rate, is the shell side fluid viscosity (unit: ), k is the thermal conductivity of the shell fluid (unit: ).

[0090] Furthermore, the heat transfer film coefficient of the shell-side fluid is calculated, and the heat transfer film coefficient of the shell-side fluid h o The calculation formula is as follows:

[0091] ;

[0092] In the formula, F c is the fluid flow influence coefficient at the circular baffle, F l is the baffle leakage influence coefficient, F b is the bundle bypass influence coefficient, and h o The unit is .

[0093] Specifically, F c The calculation formula is as follows:

[0094] ;

[0095] In the formula, the parameters The calculation formula is as follows:

[0096] ;

[0097] Where b c is the baffle cutting ratio, and b c The value range of can be [0.15, 0.45].

[0098] Specifically, F l The calculation formula is as follows:

[0099] ;

[0100] In the formula, the calculation formulas of parameter c and parameter b are as follows:

[0101] ;

[0102] ;

[0103] In the formula, S sb is the radial clearance area between the shell and the baffle (unit: m 2 ), S tb is the radial clearance area between the tube and the baffle (unit: m 2 ), where S sb The calculation formula is as follows:

[0104] ;

[0105] And S tb The calculation formula is as follows:

[0106] ;

[0107] Where, t b It is the gap between the tube and the baffle, in m.

[0108] Specifically, F b The calculation formula is as follows:

[0109] ;

[0110] In the formula, the calculation formula of m is as follows:

[0111] ;

[0112] By obtaining F c 、F l 、F b and B to obtain the shell-side fluid heat transfer film coefficient h o .

[0113] In addition, it is necessary to calculate the heat transfer film coefficient h of the tube fluid i , the unit is ,h i The calculation formula is as follows:

[0114] ;

[0115] In the formula, A t is the cross-sectional area of ​​a single pipe pass (unit: m 2 ), N t is the number of tube passes of the heat exchanger, l is the tube length (unit: m), D i is the inner diameter of the tube (unit: m), C p is the specific heat capacity of the tube-side fluid, MW is the mass flow rate of the tube-side fluid, is the viscosity of the tube-side fluid, k is the thermal conductivity of the tube-side fluid, F m is the mass flow rate of the fluid in the tube. t The calculation formula is as follows:

[0116] ;

[0117] In getting h i 、h o Finally, the total heat transfer coefficient U (also known as the target heat transfer coefficient) of the heat exchanger is calculated. The calculation formula of U is as follows:

[0118] ;

[0119] In the formula, R f It is the thermal resistance of the pipe wall fluid fouling, in K / W.

[0120] Accordingly, see Figure 2 As shown, the embodiment of the present application also provides a heat exchange performance optimization device, including:

[0121] A parameter determination module 11 is used to determine a target parameter calculation rule corresponding to the shell-side fluid based on a target state of the shell-side fluid in a double-split shell and tube heat exchanger, and to determine a corresponding first fluid parameter using the target parameter calculation rule, a first heat exchanger geometric parameter, a shell-side fluid mass flow rate, and a target double-split correction factor;

[0122] A first coefficient determination module 12, configured to determine a corresponding second fluid parameter based on the first fluid parameter, the shell-side fluid mass flow rate, shell-side fluid property information, and the first heat exchanger geometric parameter, and to determine a corresponding shell-side fluid heat transfer film coefficient based on the second fluid parameter and a preset influence coefficient;

[0123] A second coefficient determination module 13, for determining a tube-side fluid heat transfer film coefficient corresponding to the tube-side fluid in the double-split shell and tube heat exchanger based on the tube-side fluid property information, the tube-side fluid mass flow rate and the second heat exchanger geometric parameters;

[0124] The heat transfer coefficient determination module 14 is used to determine the target heat transfer coefficient by using the preset heat transfer coefficient calculation rule, the tube-side fluid heat transfer film coefficient and the shell-side fluid heat transfer film coefficient, so as to trigger the heat transfer performance optimization operation of the double-split shell and tube heat exchanger based on the target heat transfer coefficient.

[0125] As can be seen from the above, the target parameter calculation rules are determined based on the target state of the shell-side fluid in the double-divided shell and tube heat exchanger, and the first fluid parameters are obtained by combining the first heat exchanger geometric parameters, the shell-side fluid mass flow rate and the target double-divided correction factor. The second fluid parameters are determined by the first fluid parameters, the shell-side fluid mass flow rate, the property information and the geometric parameters, and the shell-side fluid heat transfer film coefficient is determined in combination with the preset influence coefficient. The tube-side fluid heat transfer film coefficient is determined according to the tube-side fluid property information, the mass flow rate and the second heat exchanger geometric parameters. Finally, the target heat transfer coefficient is determined using the preset rules, the tube-side and shell-side heat transfer film coefficients to trigger the heat exchange performance optimization operation. In this way, the present application can effectively improve the accuracy and reliability of the determined heat transfer coefficient under the conditions of combining the geometric characteristics of the heat exchanger and the actual flow of the fluid in the tube / shell side, thereby improving the accuracy of performance optimization.

[0126] In a specific implementation, the parameter determination module 11 may specifically include:

[0127] a first rule determination unit, configured to use a first preset parameter calculation rule corresponding to the thermal fluid as a target parameter calculation rule if the target state of the shell-side fluid in the double-split shell and tube heat exchanger indicates that the shell-side fluid is a thermal fluid;

[0128] a second rule determination unit, configured to use a second preset parameter calculation rule corresponding to the cold fluid as the target parameter calculation rule if the target state indicates that the shell-side fluid is a cold fluid;

[0129] A first parameter acquisition unit is used to obtain the tube inner diameter, shell inner diameter, tube core diameter, number of heat exchange tubes, number of heat exchangers in parallel, and baffle spacing of the double-split shell and tube heat exchanger to complete the corresponding first geometric parameter acquisition operation;

[0130] A result acquisition unit, used for analyzing the tube arrangement of the double-split shell and tube heat exchanger to obtain an analysis result;

[0131] A first correction factor determination unit is configured to use a first preset dual-flow diversion correction factor corresponding to the triangular arrangement as a target dual-flow diversion correction factor if the analysis result indicates that the tube pass arrangement is a triangular arrangement;

[0132] A second correction factor determination unit is configured to use a second preset dual-flow diversion correction factor corresponding to the square arrangement as the target dual-flow diversion correction factor if the analysis result indicates that the tube pass arrangement is a square arrangement;

[0133] The first parameter determination unit is used to calculate based on the tube inner diameter, the shell inner diameter, the tube core diameter, the number of heat exchange tubes, the number of heat exchangers in parallel, the baffle spacing, the target parameter calculation rule, the shell-side fluid mass flow rate and the target double-division correction factor to obtain the corresponding first fluid parameter.

[0134] In a specific implementation, the first coefficient determination module 12 may specifically include:

[0135] A first attribute collection unit is used to obtain the specific heat capacity of the shell-side fluid, the relative molecular mass of the shell-side fluid, the viscosity of the shell-side fluid and the thermal conductivity of the shell-side fluid to complete the corresponding first attribute collection operation;

[0136] The second parameter determination unit is used to calculate based on the first fluid parameter, the shell-side fluid mass flow rate, the shell-side fluid specific heat capacity, the shell-side fluid relative molecular mass, the shell-side fluid viscosity, the shell-side fluid thermal conductivity and the first heat exchanger geometric parameter to obtain the corresponding second fluid parameter.

[0137] In a specific implementation, the first coefficient determination module 12 may specifically include:

[0138] A coefficient collection unit is used to obtain the influence coefficient of baffle leakage, the influence coefficient of fluid flow at the circular baffle, and the influence coefficient of the tube bundle bypass, so as to complete the corresponding influence coefficient collection operation;

[0139] The first coefficient determination unit is used to calculate based on the second fluid parameter, the baffle leakage influence coefficient, the fluid flow influence coefficient at the circular baffle and the tube bundle bypass influence coefficient to obtain the corresponding shell-side fluid heat transfer film coefficient.

[0140] In a specific implementation, the first coefficient determination module 12 may specifically include:

[0141] A second coefficient determination unit is used to calculate based on the tube inner diameter, the shell inner diameter, the tube core diameter, the number of heat exchange tubes, the baffle cutting ratio and the target double split correction factor to obtain the fluid flow influence coefficient at the circular segment baffle;

[0142] an area determination unit, for performing calculations based on the tube inner diameter, the shell inner diameter, the tube core diameter, the number of heat exchange tubes, the baffle cutting ratio, and the clearance data between the tube side and the baffle, so as to respectively determine a first radial clearance area between the shell side and the baffle, and a second radial clearance area between the tube side and the baffle;

[0143] a third coefficient determination unit, configured to calculate based on the first radial gap area, the second radial gap area and the target double-division correction factor to obtain a corresponding baffle leakage influence coefficient;

[0144] The fourth coefficient determination unit is used to calculate based on the tube inner diameter, the shell inner diameter, the tube core diameter, the number of heat exchange tubes, the baffle spacing and the target double-division correction factor to obtain the tube bundle bypass flow influence coefficient.

[0145] In a specific implementation, the second coefficient determination module 13 may specifically include:

[0146] A second attribute collection unit is used to obtain the specific heat capacity of the tube-side fluid, the relative molecular mass of the tube-side fluid, the viscosity of the tube-side fluid and the thermal conductivity of the tube-side fluid to complete the corresponding second attribute collection operation;

[0147] The third parameter acquisition unit is used to obtain the number of tube passes of the heat exchanger and the corresponding tube length and tube inner diameter to complete the corresponding second geometric parameter acquisition operation;

[0148] The fifth coefficient determination unit is used to calculate based on the specific heat capacity of the tube-side fluid, the relative molecular mass of the tube-side fluid, the viscosity of the tube-side fluid, the thermal conductivity of the tube-side fluid, the mass flow rate of the tube-side fluid, the number of tube passes, the tube length and the inner diameter of the tube to obtain a tube-side fluid heat transfer film coefficient corresponding to the tube-side fluid.

[0149] In a specific implementation, the heat transfer coefficient determination module 14 may specifically include:

[0150] an inverse value determination unit, for taking the inverse of the tube-side fluid heat transfer film coefficient and the shell-side fluid heat transfer film coefficient respectively to obtain a first inverse value and a second inverse value;

[0151] The heat transfer coefficient determination unit is used to add the first reciprocal value, the second reciprocal value and the pipe wall fluid fouling thermal resistance, and take the reciprocal of the added result to obtain a target heat transfer coefficient.

[0152] Furthermore, the present application also discloses an electronic device. Figure 3It is a structural diagram of an electronic device 20 shown according to an exemplary embodiment, and the content in the figure cannot be regarded as any limitation on the scope of use of this application. The electronic device 20 may specifically include: at least one processor 21, at least one memory 22, a power supply 23, a communication interface 24, an input / output interface 25, and a communication bus 26. Among them, the memory 22 is used to store a computer program, and the computer program is loaded and executed by the processor 21 to implement the relevant steps in the heat exchange performance optimization method disclosed in any of the aforementioned embodiments. In addition, the electronic device 20 in this embodiment may specifically be an electronic computer.

[0153] In this embodiment, the power supply 23 is used to provide working voltage for each hardware device on the electronic device 20; the communication interface 24 can create a data transmission channel between the electronic device 20 and the external device, and the communication protocol it follows is any communication protocol that can be applied to the technical solution of the present application, and is not specifically limited here; the input and output interface 25 is used to obtain external input data or output data to the outside world, and its specific interface type can be selected according to specific application needs and is not specifically limited here.

[0154] In addition, the memory 22 as a carrier for resource storage may be a read-only memory, a random access memory, a disk or an optical disk, etc. The resources stored thereon may include an operating system 221, a computer program 222, etc., and the storage method may be temporary storage or permanent storage.

[0155] The operating system 221 is used to manage and control the hardware devices and computer program 222 on the electronic device 20, and can be Windows Server, Netware, Unix, Linux, etc. In addition to including a computer program that can be used to complete the heat exchange performance optimization method performed by the electronic device 20 disclosed in any of the aforementioned embodiments, the computer program 222 can further include a computer program that can be used to complete other specific tasks.

[0156] Furthermore, the present application also discloses a computer-readable storage medium for storing a computer program; wherein, when the computer program is executed by a processor, the aforementioned disclosed heat exchange performance optimization method is implemented. The specific steps of the method can be referred to the corresponding contents disclosed in the aforementioned embodiments, and will not be repeated here.

[0157] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0158] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0159] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0160] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0161] The technical solution provided by the present application is introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for general technicians in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for optimizing heat exchange performance, characterized in that: include: Determine a target parameter calculation rule corresponding to the shell-side fluid based on a target state of the shell-side fluid in a double-split shell and tube heat exchanger, and determine a corresponding first fluid parameter using the target parameter calculation rule, a first heat exchanger geometric parameter, a shell-side fluid mass flow rate, and a target double-split correction factor; Determine a corresponding second fluid parameter based on the first fluid parameter, the shell-side fluid mass flow rate, shell-side fluid property information, and the first heat exchanger geometric parameter, and determine a corresponding shell-side fluid heat transfer film coefficient based on the second fluid parameter and a preset influence coefficient; Determine a tube-side fluid heat transfer film coefficient corresponding to the tube-side fluid based on the tube-side fluid property information, the tube-side fluid mass flow rate and the second heat exchanger geometric parameters of the tube-side fluid in the double-split shell and tube heat exchanger; Determine a target heat transfer coefficient by using a preset heat transfer coefficient calculation rule, the tube-side fluid heat transfer film coefficient, and the shell-side fluid heat transfer film coefficient, so as to trigger a heat transfer performance optimization operation of the double-split shell and tube heat exchanger based on the target heat transfer coefficient; The target state of the shell-side fluid in the double-split shell and tube heat exchanger is used to determine a target parameter calculation rule corresponding to the shell-side fluid, and the target parameter calculation rule, the first heat exchanger geometric parameters, the shell-side fluid mass flow rate and the target double-split correction factor are used to determine the corresponding first fluid parameter, including: If the target state of the shell-side fluid in the double-split shell and tube heat exchanger indicates that the shell-side fluid is a thermal fluid, a first preset parameter calculation rule corresponding to the thermal fluid is used as a target parameter calculation rule; If the target state indicates that the shell-side fluid is a cold fluid, a second preset parameter calculation rule corresponding to the cold fluid is used as the target parameter calculation rule; Obtaining the tube inner diameter, shell inner diameter, tube core diameter, number of heat exchange tubes, number of heat exchangers in parallel, and baffle spacing of the double-divided-flow shell-and-tube heat exchanger to complete the corresponding first geometric parameter acquisition operation; Analyze the tube arrangement of the double-split shell and tube heat exchanger to obtain analysis results; If the analysis result indicates that the tube arrangement is a triangular arrangement, a first preset dual-flow split correction factor corresponding to the triangular arrangement is used as a target dual-flow split correction factor; If the analysis result indicates that the tube arrangement is a square arrangement, a second preset dual-flow split correction factor corresponding to the square arrangement is used as the target dual-flow split correction factor; Calculation is performed based on the tube inner diameter, the shell inner diameter, the tube core diameter, the number of heat exchange tubes, the number of heat exchangers in parallel, the baffle spacing, the target parameter calculation rule, the shell-side fluid mass flow rate and the target double-division correction factor to obtain the corresponding first fluid parameter.

2. The heat exchange performance optimization method according to claim 1, characterized in that: The determining of the corresponding second fluid parameter based on the first fluid parameter, the shell-side fluid mass flow rate, shell-side fluid property information and the first heat exchanger geometric parameter comprises: Obtaining the specific heat capacity, relative molecular mass, viscosity and thermal conductivity of the shell-side fluid to complete the corresponding first attribute acquisition operation; Calculation is performed based on the first fluid parameter, the shell-side fluid mass flow rate, the shell-side fluid specific heat capacity, the shell-side fluid relative molecular mass, the shell-side fluid viscosity, the shell-side fluid thermal conductivity and the first heat exchanger geometric parameters to obtain the corresponding second fluid parameter.

3. The heat exchange performance optimization method according to claim 1, characterized in that: The determining of the corresponding shell-side fluid heat transfer film coefficient based on the second fluid parameter and the preset influence coefficient includes: Obtain the baffle leakage influence coefficient, the fluid flow influence coefficient at the circular segment baffle, and the tube bundle bypass influence coefficient to complete the corresponding influence coefficient collection operation; Based on the second fluid parameter, the baffle leakage influence coefficient, the fluid flow influence coefficient at the segment-shaped baffle, and the tube bundle bypass influence coefficient, calculation is performed to obtain the corresponding shell-side fluid heat transfer film coefficient.

4. The heat exchange performance optimization method according to claim 3, characterized in that: The obtaining of the baffle leakage influence coefficient, the fluid flow influence coefficient at the circular segment baffle and the tube bundle bypass influence coefficient comprises: Calculating based on the tube inner diameter, the shell inner diameter, the tube core diameter, the number of heat exchange tubes, the baffle cutting ratio, and the target double-division correction factor to obtain the fluid flow influence coefficient at the circular segment-shaped baffle; Calculating based on the tube inner diameter, the shell inner diameter, the tube core diameter, the number of heat exchange tubes, the baffle cutting ratio, and the clearance data between the tube side and the baffle to respectively determine a first radial clearance area between the shell side and the baffle, and a second radial clearance area between the tube side and the baffle; Calculating based on the first radial gap area, the second radial gap area and the target double-flow split correction factor to obtain a corresponding baffle leakage influence coefficient; A calculation is performed based on the tube inner diameter, the shell inner diameter, the tube core diameter, the number of heat exchange tubes, the baffle spacing, and the target double-split correction factor to obtain the tube bundle bypass flow influence coefficient.

5. The heat exchange performance optimization method according to any one of claims 1 to 4, characterized in that: The method of determining the tube-side fluid heat transfer film coefficient corresponding to the tube-side fluid in the double-split shell and tube heat exchanger based on the tube-side fluid property information, the tube-side fluid mass flow rate and the second heat exchanger geometric parameters includes: Obtain the specific heat capacity, relative molecular mass, viscosity and thermal conductivity of the tube-side fluid to complete the corresponding second attribute acquisition operation; Obtain the number of tube passes of the heat exchanger and the corresponding tube length and tube inner diameter to complete the corresponding second geometric parameter acquisition operation; A calculation is performed based on the specific heat capacity of the tube-side fluid, the relative molecular mass of the tube-side fluid, the viscosity of the tube-side fluid, the thermal conductivity of the tube-side fluid, the mass flow rate of the tube-side fluid, the number of tube passes, the tube length and the inner diameter of the tube to obtain a tube-side fluid heat transfer film coefficient corresponding to the tube-side fluid.

6. The heat exchange performance optimization method according to claim 1, characterized in that: The method of determining the target heat transfer coefficient by using the preset heat transfer coefficient calculation rule, the tube-side fluid heat transfer film coefficient, and the shell-side fluid heat transfer film coefficient comprises: Taking the reciprocals of the tube-side fluid heat transfer film coefficient and the shell-side fluid heat transfer film coefficient respectively to obtain a first reciprocal value and a second reciprocal value; The first reciprocal value, the second reciprocal value and the pipe wall fluid fouling thermal resistance are added, and the reciprocal of the added result is taken to obtain a target heat transfer coefficient.

7. A heat exchange performance optimization device, characterized in that: include: a parameter determination module, for determining a target parameter calculation rule corresponding to the shell-side fluid based on a target state of the shell-side fluid in a double-split shell and tube heat exchanger, and determining a corresponding first fluid parameter using the target parameter calculation rule, a first heat exchanger geometric parameter, a shell-side fluid mass flow rate, and a target double-split correction factor; a first coefficient determination module, configured to determine a corresponding second fluid parameter based on the first fluid parameter, the shell-side fluid mass flow rate, shell-side fluid property information, and the first heat exchanger geometric parameter, and to determine a corresponding shell-side fluid heat transfer film coefficient based on the second fluid parameter and a preset influence coefficient; A second coefficient determination module, for determining a tube-side fluid heat transfer film coefficient corresponding to the tube-side fluid in the double-split shell and tube heat exchanger based on the tube-side fluid property information, the tube-side fluid mass flow rate and the second heat exchanger geometric parameters; a heat transfer coefficient determination module, configured to determine a target heat transfer coefficient by using a preset heat transfer coefficient calculation rule, the tube-side fluid heat transfer film coefficient, and the shell-side fluid heat transfer film coefficient, so as to trigger a heat transfer performance optimization operation of the double-split shell and tube heat exchanger based on the target heat transfer coefficient; The parameter determination module comprises: a first rule determination unit, configured to use a first preset parameter calculation rule corresponding to the thermal fluid as a target parameter calculation rule if the target state of the shell-side fluid in the double-split shell and tube heat exchanger indicates that the shell-side fluid is a thermal fluid; a second rule determination unit, configured to use a second preset parameter calculation rule corresponding to the cold fluid as the target parameter calculation rule if the target state indicates that the shell-side fluid is a cold fluid; A first parameter acquisition unit is used to obtain the tube inner diameter, shell inner diameter, tube core diameter, number of heat exchange tubes, number of heat exchangers in parallel, and baffle spacing of the double-split shell and tube heat exchanger to complete the corresponding first geometric parameter acquisition operation; A result acquisition unit, used for analyzing the tube arrangement of the double-split shell and tube heat exchanger to obtain an analysis result; A first correction factor determination unit is configured to use a first preset dual-flow diversion correction factor corresponding to the triangular arrangement as a target dual-flow diversion correction factor if the analysis result indicates that the tube pass arrangement is a triangular arrangement; A second correction factor determination unit is configured to use a second preset dual-flow diversion correction factor corresponding to the square arrangement as the target dual-flow diversion correction factor if the analysis result indicates that the tube pass arrangement is a square arrangement; The first parameter determination unit is used to calculate based on the tube inner diameter, the shell inner diameter, the tube core diameter, the number of heat exchange tubes, the number of heat exchangers in parallel, the baffle spacing, the target parameter calculation rule, the shell-side fluid mass flow rate and the target double-division correction factor to obtain the corresponding first fluid parameter.

8. An electronic device, characterized in that: include: Memory, used to store computer programs; A processor is used to execute the computer program to implement the heat exchange performance optimization method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that: Used to store a computer program; wherein, when the computer program is executed by a processor, the heat exchange performance optimization method according to any one of claims 1 to 6 is implemented.

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