Elastic cooling water pipe network system and control method thereof

Abstract

The invention discloses an elastic cooling water pipe network system and a control method thereof. The elastic cooling water pipe network system comprises a water supply main pipe, a water return main pipe, a first parallel branch, a second parallel branch and a first series branch. One end of the first parallel branch is communicated with the water supply main pipe, the other end of the first parallel branch is connected with the water return main pipe, and a first adjusting valve, a first cooling water user and a first stop valve are sequentially arranged on the first parallel branch. One end of the second parallel branch is communicated with the water supply main pipe, the other end of the second parallel branch is connected with the water return main pipe, and a second adjusting valve, a second cooling water user and a second stop valve are sequentially arranged on the second parallel branch. One end of the first series branch is communicated with the first parallel branch, and the other end of the first series branch is connected with the second parallel branch. Therefore, the throttling loss of the valve under the low working condition can be effectively reduced, the power of the cooling water pump is reduced, and the requirements of multiple operation working conditions of a ship power system are met.

Description

Technical Field

[0001] The present invention relates to the technical field of ship power system cooling, and particularly to an elastic cooling water pipe network system and a control method thereof. Background Art

[0002] During the operation of equipment or components such as power, electronics, and bearings in a ship power system, a large amount of heat is generated. This heat needs to be removed through heat exchange by a cooling water pipe network system. At the same time, the cooling water pipe network can also provide a cold source for systems such as air conditioners. The cooling water pipe network mainly adopts a main-branch structure, that is, each cooling user is connected in parallel between the water supply main pipe and the return water main pipe, and a regulating valve is set on the branch to adjust the resistance of the entire branch and the cooling water flow rate to meet the user's needs.

[0003] The ship power system has multiple operating conditions, and the change trends of the cooling water demand of each cooling user are different under different operating conditions. Users such as air conditioners are not sensitive to changes in operating conditions, while users such as motors are very sensitive to changes in operating conditions.

[0004] Therefore, under low operating conditions, the condition-sensitive users need to perform greater valve throttling, resulting in an increase in throttling losses, which is not conducive to reducing the power of the cooling water pump and is difficult to meet the development needs of future green ships. Summary of the Invention

[0005] The purpose of the present invention is to provide an elastic cooling water pipe network system and a control method thereof, which have the advantages of effectively reducing valve throttling losses under low operating conditions, reducing the power of the cooling water pump, and adapting to the requirements of multiple operating conditions of the ship power system.

[0006] To achieve the above object, in a first aspect, the present invention provides an elastic cooling water pipe network system, including: a water supply main pipe, a return water main pipe, a first parallel branch, a second parallel branch, and a first series branch. One end of the first parallel branch is communicated with the water supply main pipe, and the other end is connected to the return water main pipe. A first regulating valve, a first cooling water user, and a first stop valve are sequentially arranged on the first parallel branch. One end of the second parallel branch is communicated with the water supply main pipe, and the other end is connected to the return water main pipe. A second regulating valve, a second cooling water user, and a second stop valve are sequentially arranged on the second parallel branch. One end of the first series branch is communicated with the first parallel branch, and the other end is connected to the second parallel branch. Among them, a third stop valve is arranged on the first series branch.

[0007] In an embodiment of the present invention, the elastic cooling water pipe network system further includes: a third parallel branch and a second series branch. One end of the third parallel branch is communicated with the water supply main pipe, and the other end is connected to the water return main pipe. A third regulating valve, a third cooling water user, and a fourth stop valve are sequentially arranged on the third parallel branch. And one end of the second series branch is communicated with the second parallel branch, and the other end is connected to the third parallel branch. A fifth stop valve is arranged on the second series branch.

[0008] In an embodiment of the present invention, the elastic cooling water pipe network system further includes a controller, which is electrically connected to the first regulating valve, the first stop valve, the second regulating valve, the second stop valve, the third stop valve, the third regulating valve, the fourth stop valve, and the fifth stop valve respectively.

[0009] In an embodiment of the present invention, the connection point where the one end of the first series branch is communicated with the first parallel branch is located between the first cooling water user and the first stop valve, and the connection point where the other end of the first series branch is communicated with the second parallel branch is located between the second cooling water user and the second stop valve.

[0010] In an embodiment of the present invention, the connection point where the one end of the second series branch is communicated with the second parallel branch is located between the second cooling water user and the second stop valve, and the connection point where the other end of the second series branch is communicated with the third parallel branch is located between the third cooling water user and the fourth stop valve.

[0011] In an embodiment of the present invention, the elastic cooling water pipe network system further includes: a fourth parallel branch, a first multi-way mechanism, a third series branch, a second multi-way mechanism, a fourth series branch, and a fifth series branch. One end of the fourth parallel branch is communicated with the water supply main pipe, and the other end is connected to the water return main pipe. A fourth regulating valve, a fourth cooling water user, and a sixth stop valve are sequentially arranged on the fourth parallel branch. The first end of the first multi-way mechanism is used to be communicated with the other end of the first series branch, and the second end is used to be communicated with the one end of the second series branch. One end of the third series branch is communicated with the second parallel branch, and the other end is connected to the second end of the first multi-way mechanism. The first end of the second multi-way mechanism is used to be communicated with the other end of the second series branch. One end of the fourth series branch is connected to the second end of the second multi-way mechanism, and the other end is communicated with the third parallel branch. And one end of the fifth series branch is connected to the third end of the second multi-way mechanism, and the other end is communicated with the fourth parallel branch.

[0012] In an embodiment of the present invention, the controller is electrically connected to the fourth regulating valve and the sixth stop valve respectively.

[0013] In an embodiment of the present invention, the connection point where one end of the third series branch communicates with the second parallel branch is located between the second cooling water user and the second stop valve.

[0014] In an embodiment of the present invention, the connection point where the other end of the fourth series branch communicates with the third parallel branch is located between the third cooling water user and the fourth stop valve.

[0015] In an embodiment of the present invention, the connection point where the other end of the fourth series branch communicates with the third parallel branch is located between the third cooling water user and the fourth stop valve.

[0016] In a second aspect, the present invention provides a control method for an elastic cooling water pipe network system, which is applied to the above-mentioned elastic cooling water pipe network system. The control method of the elastic cooling water pipe network system includes:

[0017] Real-time monitoring of the system working condition;

[0018] When it is determined to be a high working condition, close the stop valves of all cooling series branches to make each cooling parallel branch operate independently in a full parallel mode;

[0019] When it is determined to be a low working condition, perform the following operations:

[0020] Open the stop valve of at least one cooling series branch;

[0021] Close the outlet stop valve of the cooling parallel branch connected to the inlet end of the cooling series branch;

[0022] Reduce or completely close the opening degree of the inlet regulating valve of the cooling parallel branch connected to the outlet end of the cooling series branch to switch the pipe network to a series-parallel hybrid operation mode;

[0023] Real-time monitor the hot-side temperature of each cooling user, and dynamically adjust the opening degree of the inlet regulating valve of the corresponding cooling parallel branch according to the temperature feedback.

[0024] Compared with the prior art, the elastic cooling water pipe network system and its control method according to the present invention have the following beneficial effects:

[0025] 1. Reduced valve throttling losses under low operating conditions: By setting up a series branch between parallel branches, it allows the cooling water to be transferred between branches, avoiding the throttling losses caused by the need to significantly close the regulating valve in a single branch due to the decrease in flow demand under low operating conditions; the series branch provides a flow path across branches, converting the energy that originally needed to be consumed by the valve into effective flow kinetic energy, significantly reducing the throttling losses.

[0026] 2. Reduced the power of the cooling water pump: Due to the reduction of valve throttling losses, the overall resistance of the cooling water pipe network system is reduced, and the cooling water pump does not need to maintain high-power operation to overcome excessive pipeline resistance; this not only reduces the energy consumption of the cooling water pump but also improves the energy efficiency of the entire ship power system.

[0027] 3. Adapted to the operating condition requirements of various ship power systems: The elastic cooling water pipe network system of the present invention can dynamically adjust the flow distribution of each branch according to the cooling water demand under different operating conditions; through the coordinated control of the regulating valve and the stop valve by the controller, precise regulation of the cooling water flow and pressure is achieved, meeting the cooling requirements of the ship power system under different operating conditions.

[0028] 4. Improved the flexibility and scalability of the system: By adding parallel branches and series branches, it is convenient to expand the user capacity of the cooling water pipe network system; the cooperation of the multi-way mechanism and the multi-stage series branches enables new users to be quickly connected to the existing pipe network without repeated transformation of the main pipe structure.

[0029] 5. Enhanced the stability and reliability of the system: The design of the regulating valve and the stop valve ensures the independent operation ability of each branch, and safety isolation can be achieved by closing the stop valve during maintenance; the cross-branch flow sharing mechanism enables the system to dynamically adjust the flow distribution path according to the differences in user demands, avoiding energy loss and system oscillation caused by excessive throttling in a single branch.

[0030] 6. Achieved the optimal control of the cooling water pipe network system: The controller coordinately controls each regulating valve and stop valve through a preset control algorithm, achieving the overall optimization of the cooling water pipe network system; by balancing the water flow distribution between parallel branches, local throttling losses are reduced, and the power consumed by the pump to overcome pipeline resistance is decreased. Description of the Drawings

[0031] Figure 1 is a schematic structural diagram of a single-in and single-out two-stage series of an elastic cooling water pipe network system according to an embodiment of the present invention;

[0032] Figure 2 is a schematic structural diagram of a single-in and single-out three-stage series of a magneto-elastic cooling water pipe network system according to an embodiment of the present invention;

[0033] Figure 3 It is a schematic structural diagram of a multi-inlet and multi-outlet two-stage series connection of an elastic cooling water pipe network system according to an embodiment of the present invention.

[0034] Main reference numerals description:

[0035] 1 - water supply main pipe, 2 - return water main pipe, 3 - first parallel branch, 31 - first regulating valve, 32 - first cooling water user, 33 - first stop valve, 4 - second parallel branch, 41 - second regulating valve, 42 - second cooling water user, 43 - second stop valve, 5 - first series branch, 51 - third stop valve, 6 - third parallel branch, 61 - third regulating valve, 62 - third cooling water user, 63 - fourth stop valve, 7 - second series branch, 71 - fifth stop valve, 8 - fourth parallel branch, 81 - fourth regulating valve, 82 - fourth cooling water user, 83 - sixth stop valve, 9 - first multi-way mechanism, 10 - third series branch, 11 - second multi-way mechanism, 12 - fourth series branch, 13 - fifth series branch. Specific embodiments

[0036] Next, the technical solutions in the present application will be clearly and completely described in conjunction with the drawings in the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Usually, the components of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application to be protected, but only represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application. It should be noted that: similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present application, the terms "first", "second", etc. are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance.

[0037] For the convenience of understanding, first, the main implementation concepts of the embodiments of the present invention are briefly described.

[0038] In the prior art, the ship cooling water pipe network system generally adopts a main branch pipe structure, and each cooling user is connected between the water supply main pipe 1 and the return water main pipe 2 through a parallel branch. Under this structure, in different working conditions, sensitive users need to frequently adjust the opening degree of the branch valves to match the change of cooling demand. When the ship is operating under low working conditions, the flow demand of the sensitive user branch decreases, and the opening degree of the regulating valve needs to be greatly reduced, resulting in a sharp increase in pipeline resistance and throttling loss. This phenomenon directly causes an increase in the output power of the cooling water pump, which is contradictory to the goal of energy conservation and emission reduction.

[0039] To solve the above problems, the inventor noticed the limitations of independent regulation of parallel branches and considered how to achieve resistance coordination through pipeline structure optimization. The research found that if a controllable connection channel is established between parallel branches, hydraulic coupling can be formed between different branches. When a certain branch needs to reduce the flow rate, part of the cooling water can be guided through the connection channel to other branches to avoid excessive throttling of a single branch. Based on this idea, it is proposed to set up a series branch with a stop valve between parallel branches to construct a dynamically adjustable pipe network topology.

[0040] As Figure 1 shown, an elastic cooling water pipe network system according to a preferred embodiment of the present invention includes: a water supply main pipe 1, a return water main pipe 2, a first parallel branch 3, a second parallel branch 4, and a first series branch 5. One end of the first parallel branch 3 is connected to the water supply main pipe 1, and the other end is connected to the return water main pipe 2. A first regulating valve 31, a first cooling water user 32, and a first stop valve 33 are sequentially arranged on the first parallel branch 3. One end of the second parallel branch 4 is connected to the water supply main pipe 1, and the other end is connected to the return water main pipe 2. A second regulating valve 41, a second cooling water user 42, and a second stop valve 43 are sequentially arranged on the second parallel branch 4. One end of the first series branch 5 is connected to the first parallel branch 3, and the other end is connected to the second parallel branch 4. Among them, a third stop valve 51 is arranged on the first series branch 5.

[0041] Among them, the water supply main pipe 1 refers to the main pipeline for transporting cooling water, which can be specifically implemented by an annular or tree-shaped layout and is used to distribute the cooling medium to each branch. The return water main pipe 2 refers to the main pipeline for collecting the returned cooling water, and its pipe diameter size can match that of the water supply main pipe 1 and is used to recover the cooling water that has completed heat exchange. The first parallel branch 3 refers to the cooling channel independently connecting the water supply and the return water main pipe 2. The regulating valve and stop valve arranged at the inlet and outlet are used to control the on-off state of the branch and ensure the independent maintenance ability of the user equipment. The first cooling water user 32 refers to the ship equipment that needs to be cooled, such as a motor or an air conditioning system, and the internal flow channel design needs to meet specific heat exchange requirements. The second parallel branch 4 and the first parallel branch 3 are arranged in a parallel relationship, and the two form an interconnected structure through the series branch to realize the dynamic coupling of hydraulic parameters. The first series branch 5 refers to the auxiliary pipeline bridging two parallel branches, and its pipe diameter can be smaller than that of the parallel branches. The opening and closing of the third stop valve 51 control the start and stop of the cross-branch flow.

[0042] Specifically, when the system is in a high operating condition, the third shut-off valve 51 remains closed, and each parallel branch operates independently. At this time, the first regulating valve 31 and the first shut-off valve 33 are fully open to ensure that the first cooling water user 32 obtains the maximum flow rate; the second regulating valve 41 and the second shut-off valve 43 are also fully open, and the second cooling water user 42 operates independently. When the operating condition decreases and the demand of the second cooling water user 42 decreases, the third shut-off valve 51 can be opened to allow some cooling water to flow from the first parallel branch 3 through the series branch into the second parallel branch 4. The formation of this flow path enables the second regulating valve 41 at the inlet of the second parallel branch 4 to only need to be moderately adjusted instead of being fully closed to achieve flow control, thereby reducing the throttling loss. At the same time, the excess flow rate of the first cooling water user 32 is redistributed to the second parallel branch 4 to avoid waste of the pump output power.

[0043] Compared with the prior art, the traditional parallel structure can only achieve flow control by throttling the regulating valve, while the present invention establishes a cross-branch hydraulic connection through the series branch. In the prior art, the cooling water can only circulate within a single branch, and any flow adjustment will directly increase the pipeline resistance; the present invention allows the cooling water to transfer between the parallel branches, converting the energy originally consumed by the valve into effective flow kinetic energy. This structural innovation enables the system to significantly reduce the throttling range of the regulating valve while maintaining the cooling demand.

[0044] Through the above technical solutions, the present application effectively alleviates the problem of excessive throttling of the sensitive user branch under low operating conditions. The cross-branch flow path provided by the series branch enables the cooling water to be redistributed between different branches according to actual needs, reducing the adjustment pressure of a single branch. This structure reduces the energy loss caused by valve throttling, enables the cooling water pump to operate at a more optimal operating point, and realizes the improvement of the overall energy efficiency of the system. At the same time, the designs of the regulating valve and the shut-off valve ensure the independent operating ability of each branch, and safety isolation can be achieved by closing the shut-off valve during maintenance and repair.

[0045] As Figure 2 shown, in this embodiment, the elastic cooling water pipe network system further includes: a third parallel branch 6 and a second series branch 7. One end of the third parallel branch 6 is connected to the water supply main pipe 1, and the other end is connected to the water return main pipe 2. A third regulating valve 61, a third cooling water user 62, and a fourth shut-off valve 63 are sequentially arranged on the third parallel branch 6. And one end of the second series branch 7 is connected to the second parallel branch 4, and the other end is connected to the third parallel branch 6. A fifth shut-off valve 71 is arranged on the second series branch 7.

[0046] Among them, the third parallel branch 6 refers to the cooling water flow path that independently connects the water supply main pipe 1 and the return water main pipe 2. The opening and closing and flow regulation of the third cooling water user 62 are controlled by the third regulating valve 61 and the fourth stop valve 63, forming an independent branch parallel to the first parallel branch 3 and the second parallel branch 4. The second series branch 7 refers to the auxiliary pipeline that cross-connects the second parallel branch 4 and the third parallel branch 6. The dynamic distribution of the cooling water flow between the branches is realized by the opening and closing of the fifth stop valve 71. The third regulating valve 61 and the fourth stop valve 63 can be stop valves, gate valves, butterfly valves or solenoid valves, etc., and are respectively arranged at the front and rear ends of the third cooling water user 62 to independently control the on-off and flow of this branch. The fifth stop valve 71 can be a stop valve, a gate valve, a butterfly valve or a solenoid valve, etc., and its opening degree is controlled by a signal to adjust the flow exchange between the second parallel branch 4 and the third parallel branch 6; among them, generally only the opening degree of the regulating valve is changed, while the stop valve is fully opened or fully closed.

[0047] Specifically, when the second cooling water user 42 is in a low operating condition demand, the second regulating valve 41 and the second stop valve 43 in its second parallel branch 4 need to throttle significantly to reduce the flow rate. At this time, the fifth stop valve 71 can be partially opened, and part of the cooling water in the second parallel branch 4 is diverted to the third parallel branch 6 through the second series branch 7. The third regulating valve 61 and the fourth stop valve 63 in the third parallel branch 6 can be adjusted synchronously, so that the third cooling water user 62 receives the diverted cooling water, thereby reducing the throttling amplitude of the second regulating valve 41 and the second stop valve 43 in the second parallel branch 4. This cross-branch flow sharing mechanism enables the system to dynamically adjust the flow distribution path according to the user demand differences, avoiding energy loss caused by excessive throttling in a single branch. At the same time, the addition of the third parallel branch 6 expands the number of cooling users that the system can accommodate, while the second series branch 7 provides a physical connection channel for the flow coordination between the branches.

[0048] Compared with the prior art, the traditional ship cooling water pipe network only adopts a parallel branch structure, and each branch is independent of each other, and flow sharing cannot be achieved. When the user demand differences are significant under low operating conditions, the branch where the sensitive user is located must throttle significantly through the valve to meet the flow demand, resulting in an increase in throttling loss. However, in this solution, by introducing the third parallel branch 6 and the second series branch 7, an interconnected structure between the branches is constructed, enabling the cooling water flow to be redistributed between different branches, thereby reducing the dependence on the throttling of a single valve.

[0049] Through the above technical solutions, the present invention can reduce the throttling loss of the sensitive user branch under low operating conditions, reduce the overall power demand of the cooling water pump, and at the same time, by expanding the number of parallel branches and the cross-branch series structure, improve the flexibility and user capacity of the pipe network system to adapt to the complex cooling requirements of the ship power system under multiple operating conditions.

[0050] In this embodiment, the elastic cooling water pipe network system further includes a controller, which is electrically connected to the first regulating valve 31, the first stop valve 33, the second regulating valve 41, the second stop valve 43, the third stop valve 51, the third regulating valve 61, the fourth stop valve 63, and the fifth stop valve 71 respectively.

[0051] Among them, electrical connection means establishing an electrical signal transmission channel through wires or wireless communication methods, and specifically, an industrial bus or a PLC control module can be used to achieve it, which is used to transmit control instructions and feedback signals. The regulating valve and the stop valve refer to fluid control components with opening and closing adjustment functions. Specifically, the regulating valve can be implemented by a ball valve driven by an electric actuator, and the flow area of the pipeline is adjusted by changing the opening of the valve core; while the stop valve can be specifically implemented by a stop valve, a gate valve, a butterfly valve, or a solenoid valve driven by an electric actuator, etc.

[0052] Specifically, the controller performs coordinated control on each regulating valve and stop valve through a preset control algorithm. When the ship power system is in a low working condition, after the sensor detects a change in the required flow rate of the cooling water user, it sends a signal to the controller. The controller calculates the target resistance values of each parallel branch according to the real-time working condition data, and synchronously adjusts the opening combinations of the inlet valves and outlet valves of each branch. For example, the opening of the second regulating valve 41 is adjusted to 60%, and at the same time, the second stop valve 43 is fully opened or closed. For the third stop valve 51 and the fifth stop valve 71 in the series branch, the controller dynamically adjusts their openings according to the pressure difference between adjacent branches. For example, when the pressure difference in the second parallel branch 4 exceeds the set threshold, the third stop valve 51 is opened to form an auxiliary flow path. Through the coordinated optimization of the opening degrees of the multi-branch valves, the overall resistance distribution of the pipe network is matched with the working characteristics of the water pump.

[0053] Compared with the prior art, the traditional cooling water pipe network system adopts an independent valve adjustment method, and the operations of the valves in each branch are isolated from each other, and global resistance optimization cannot be achieved. In this solution, by establishing a valve control network, the regulating valves in the parallel branches and the connecting valves in the series branches are incorporated into a unified control system. For example, in the prior art, the valves in the first parallel branch 3 and the second parallel branch 4 need to be adjusted separately, while in this solution, the pressure difference compensation between the two parallel branches can be achieved by adjusting the opening of the third stop valve 51.

[0054] Through the above technical solution, the present invention can automatically adjust the opening combinations of multi-branch valves when the power system changes working conditions, balance the water flow distribution between parallel branches, and effectively reduce the local throttling loss. By dynamically controlling the valves in the series branch to establish an auxiliary flow path, the power consumed by the water pump to overcome the pipeline resistance is reduced, and the overall energy consumption of the cooling water pipe network system is optimized and controlled.

[0055] In this embodiment, the connection point where the one end of the first series branch 5 communicates with the first parallel branch 3 is located between the first cooling water user 32 and the first stop valve 33, and the connection point where the other end of the first series branch 5 communicates with the second parallel branch 4 is located between the second cooling water user 42 and the second stop valve 43.

[0056] Among them, the first series branch 5 refers to a pipeline structure bridging between two parallel branches, which can be specifically implemented by using a DN50 stainless steel pipe with flange connections. Its function is to establish a hydraulic connection between adjacent cooling water users. The connection point between the first cooling water user 32 and the first stop valve 33 refers to the transition section between the outlet end of the user equipment and the return water valve, which can be specifically achieved by a tee joint for branch connection. This location selection can retain the original flow regulation function of the parallel branch. The connection point between the second cooling water user 42 and the second stop valve 43 adopts the same structural design. By connecting the series branch to the outlet side of the user rather than the front end of the valve, the hydraulic characteristics when each branch operates independently can be maintained.

[0057] Specifically, when the first cooling water user 32 is in a low-load state, after the third stop valve 51 is opened, a cross-branch flow channel is formed. Cooling water flows from the outlet of the first cooling water user 32 through the first series branch 5 to the return end of the second parallel branch 4. At this time, the opening degree of the first stop valve 33 can be appropriately increased to reduce the flow resistance. This flow path enables the return water pressure of the first cooling water user 32 to act directly on the second parallel branch 4 through the series branch, avoiding the steep pressure drop caused by throttling in a single branch in the traditional parallel structure. At the same time, the connection position at the outlet end of the second cooling water user 42 allows its return water pressure to act reversely on the first parallel branch 3, forming a two-way pressure buffering mechanism. When the ship power system switches to a low operating condition, this structure reduces the frequent adjustment requirements for regulating valves and stop valves by automatically balancing the pressure difference between adjacent branches.

[0058] Compared with the prior art, in the traditional cooling water pipe network, each parallel branch is independently connected between the water supply main pipe 1 and the return water main pipe 2. When the user flow demand changes, individual adjustment is required through regulating valves and stop valves. However, in this solution, by adding a series branch at a specific position between adjacent branches, the cooling water can form a compensatory flow between different users. This design changes the hydraulic topology of the pipe network. While maintaining the independence of the parallel branches, the series branch is used to achieve the redistribution of pressure energy, reducing the valve throttling flow required to balance the system pressure under low operating conditions.

[0059] Through the above technical solution, the present invention can effectively alleviate the pressure fluctuation of the sensitive user branch under low working conditions and reduce the energy loss caused by excessive throttling of the valve. The compensation flow of the cooling water between the cross branches reduces the overall flow resistance of the pipe network system, enabling the cooling water pump to maintain the system circulation at a lower lift, thereby optimizing the operating power consumption. On the premise of ensuring the cooling requirements of each user, this structure improves the pressure stability of the system by improving the pipe network connection method.

[0060] In this embodiment, the connection point where the one end of the second series branch 7 communicates with the second parallel branch 4 is located between the second cooling water user 42 and the second stop valve 43, and the connection point where the other end of the second series branch 7 communicates with the third parallel branch 6 is located between the third cooling water user 62 and the fourth stop valve 63.

[0061] Among them, the second series branch 7 refers to the pipe structure connecting different parallel branches, which can be specifically realized by a metal pipe with a valve. Its function is to establish a water flow channel across the branches. The connection point being located between the second cooling water user 42 and the second stop valve 43 means that the pipe connection point is in the pipe section between the outlet end of the cooling water user and the downstream stop valve. It can be specifically realized by a tee fitting. Its function is to obtain the water flow that has not been throttled by the stop valve on the outlet side of the user. The other end connection point being located between the third cooling water user 62 and the fourth stop valve 63 means the corresponding position of the pipe connection point between the outlet end of the third user and the downstream stop valve. The same structure connection method can be specifically adopted, and its function is to directly transport the cross-connected water flow to the outlet side of the user in another branch.

[0062] Specifically, when the cooling water user demand of the second parallel branch 4 decreases, the second series branch 7 can be enabled. At this time, the water flow directly flows from the outlet end of the second user to the pipe section at the outlet end of the third user in the third parallel branch 6, bypassing the throttling position of the second stop valve 43 in the original branch. Similarly, when the third parallel branch 6 needs to allocate water flow, a reverse flow path is established. This cross-branch connection method allows a supplementary water supply path to be formed between adjacent branches, while maintaining the cooling water flow at the user end, avoiding the pressure loss caused by adjusting the flow rate by closing the stop valve.

[0063] Compared with the prior art, the traditional parallel branch system can only adjust the water flow by the valve opening within a single branch. When the user demand changes, throttling losses will inevitably occur. However, in this solution, a cross-connecting branch is set between the outlet end of the user and the stop valve to form a pressure balance channel between the branches, which can directly transfer the excess water flow without completely relying on valve throttling, changing the working mode of independent adjustment of a single branch.

[0064] Through the above technical solution, the present invention can divert the excess cooling water to the adjacent branch through the jumper branch, reducing the valve adjustment range while maintaining the total system flow rate. When the user demand of a certain branch drops suddenly, part of the water flow can be transferred to other branches through the second series branch 7 for continuous utilization, avoiding the energy loss caused by excessive valve closing. This structure effectively improves the adaptability of the pipe network system to multiple working conditions, especially when the ship power system operates at a low load, it can reduce the power consumption of the water pump to overcome the throttling resistance.

[0065] As Figure 3 shown, in this embodiment, the elastic cooling water pipe network system further includes: a fourth parallel branch 8, a first multi-way mechanism 9, a third series branch 10, a second multi-way mechanism 11, a fourth series branch 12, and a fifth series branch 13. One end of the fourth parallel branch 8 is connected to the water supply main pipe 1, and the other end is connected to the return water main pipe 2. A fourth regulating valve 81, a fourth cooling water user 82, and a sixth stop valve 83 are sequentially arranged on the fourth parallel branch 8. The first end of the first multi-way mechanism 9 is used to communicate with the other end of the first series branch 5, and the second end is used to communicate with the one end of the second series branch 7. One end of the third series branch 10 is connected to the second parallel branch 4, and the other end is connected to the second end of the first multi-way mechanism 9. The first end of the second multi-way mechanism 11 is used to communicate with the other end of the second series branch 7. One end of the fourth series branch 12 is connected to the second end of the second multi-way mechanism 11, and the other end is connected to the third parallel branch 6. And one end of the fifth series branch 13 is connected to the third end of the second multi-way mechanism 11, and the other end is connected to the fourth parallel branch 8.

[0066] Among them, the fourth parallel branch 8 refers to an independent cooling water circulation path that forms a parallel structure with the water supply main pipe 1 and the return water main pipe 2, and can be specifically implemented by a pipe structure with two stop valves. Its function is to expand the user access capacity of the cooling water pipe network. The first multi-way mechanism 9 and the second multi-way mechanism 11 both refer to fluid distribution devices with at least two connection ports, and can be specifically implemented by a three-way valve structure. Its function is to realize the fluid intercommunication between different series branches. The third series branch 10 refers to an auxiliary pipe connecting the second parallel branch 4 and the first multi-way mechanism 9, and can be specifically implemented by a straight-through pipe with a stop valve. Its function is to form a cross-branch cooling water bypass path. The fourth series branch 12 and the fifth series branch 13 refer to extended pipes connecting the second multi-way mechanism 11 to the third parallel branch 6 and the fourth parallel branch 8 respectively, and can be specifically implemented by segmented detachable pipe sections. Its function is to construct a multi-level extended pipe network topology structure.

[0067] Specifically, the setting of the fourth parallel branch 8 enables the system to add an access point for the fourth cooling water user 82, and its independent operation or coordinated operation with other branches is controlled by the fourth regulating valve 81 and the sixth stop valve 83. The first multi-way mechanism 9 establishes a cross-branch connection between the original first series branch 5 and the second series branch 7. When there are flow fluctuations in the first parallel branch 3 or the second parallel branch 4, by adjusting the opening and closing states of the third stop valve 51 and the fifth stop valve 71, the cooling water can form a cross-branch compensation flow through the first multi-way mechanism 9. The third series branch 10 is connected to the first multi-way mechanism 9 downstream of the second parallel branch 4. When the demand of the second cooling water user 42 decreases, part of the cooling water can be diverted through the third series branch 10 to the first multi-way mechanism 9 and then transferred to other branches. The second multi-way mechanism 11 serves as the core hub. Its first end receives the cooling water from the second series branch 7, the second end is connected to the third parallel branch 6 through the fourth series branch 12, and the third end is connected to the fourth parallel branch 8 through the fifth series branch 13, forming a three-stage flow splitting structure. When the valve group of the second multi-way mechanism 11 is switched, the cooling water can be selected to flow to the third parallel branch 6, the fourth parallel branch 8 or both at the same time, realizing the dynamic redistribution of the flow rate. In actual application (when there are two series connections with multiple inlets and multiple outlets), stop valves may not be provided on the first series branch 5, the third series branch 10, the fourth series branch 12 and the fifth series branch 13, and only the second series branch 7 needs to be provided with stop valves.

[0068] Compared with the prior art, the existing cooling water pipe network only adopts a combination of parallel branches and a single series branch, and cannot achieve the interconnection and intercommunication between multiple branches. When adding new users, the main pipe structure needs to be rearranged. However, in this solution, through the cooperation of the multi-way mechanism and the multi-stage series branches, the newly added fourth parallel branch 8 can be connected to the existing pipe network through the fifth series branch 13, while retaining the connection path with the third parallel branch 6, avoiding repeated transformation of the main pipe structure. In the existing system, only the valve of a single branch can be adjusted for flow control under low working conditions. In this solution, the network connection formed by the first multi-way mechanism 9 and the second multi-way mechanism 11 allows the cooling water to be transferred in multiple paths between the four parallel branches, significantly reducing the valve throttling demand of a single branch.

[0069] Through the above technical solutions, this application solves the problem that the main pipe of the cooling water pipe network needs to be frequently transformed during expansion. Through the modular connection method of the multi-way mechanism and the series branches, the rapid access of new users is realized. Under various operating conditions, the cooling water can be switched to the optimal flow path through the multi-way mechanism according to the demand differences of each user, reducing the valve throttling loss of the branches of highly sensitive users. For the four parallel branches that have been connected, complementary flow channels can be formed through multi-stage series branches. When the flow rate of a certain branch needs to be reduced due to working condition changes, the excess cooling water can be transferred to other branches through the series branches, thereby reducing the overall power consumption of the cooling water pump.

[0070] In this embodiment, the controller is electrically connected to the fourth regulating valve 81 and the sixth stop valve 83 respectively.

[0071] Among them, the fourth regulating valve 81 refers to the valve arranged at the water supply end of the fourth parallel branch 8, which can be specifically realized by an electric stop valve and is used to regulate the cooling water flow rate entering the fourth cooling water user 82. The sixth stop valve 83 refers to the valve arranged at the return water end of the fourth parallel branch 8, which can be specifically realized by an electric stop valve and is used to regulate the fluid resistance at the outlet of the fourth cooling water user 82. The coordinated control of the two reduces the throttling loss in the branch by balancing the pressure difference between the water supply end and the return water end.

[0072] Specifically, the controller is configured to receive the operating condition signal of the fourth cooling water user 82 and generate a corresponding valve opening instruction according to a preset algorithm. The opening degrees of the fourth regulating valve 81 and the sixth stop valve 83 are adjusted synchronously, so that the water supply flow rate and the return water resistance of the fourth parallel branch 8 are dynamically matched. When the demand of the fourth cooling water user 82 decreases, the controller restricts the water supply flow rate by reducing the opening degree of the fourth regulating valve 81, and at the same time increases the opening degree of the sixth stop valve 83 to reduce the return water resistance, thereby avoiding local pressure mutation caused by excessive throttling of a single valve. This two-way regulation mechanism can maintain the hydraulic balance in the branch and reduce the energy loss caused by flow fluctuation.

[0073] Compared with the prior art, the traditional cooling water pipe network only regulates the branch flow rate through a single valve, resulting in pressure imbalance between the water supply end and the return water end, and the throttling loss is concentrated at the valve. This solution realizes the linkage control of the valves at both ends of the fourth parallel branch 8 by the controller, disperses the throttling effect to the two nodes of water supply and return water, and makes the fluid resistance distribution more uniform. In addition, the automatic control replaces the manual regulation, which can respond to the change of operating conditions in real time and avoid the energy waste caused by lag operation.

[0074] Through the above technical solution, the present invention realizes the precise regulation of the cooling water flow rate of the fourth parallel branch 8, effectively reduces the pressure drop loss caused by valve throttling, and reduces the power consumption of the cooling water pump. At the same time, by dynamically balancing the water supply and return water pressures in the branch, it avoids the system oscillation caused by flow mutation and improves the stability of the pipe network operation. This solution is particularly suitable for the ship power system with multiple operating condition switches and can adapt to the complex demand scenarios where air-conditioning users and sensitive equipment coexist.

[0075] In this embodiment, the connection point where one end of the third series branch 10 is connected to the second parallel branch 4 is located between the second cooling water user 42 and the second stop valve 43.

[0076] Among them, the third series branch 10 refers to a pipeline structure for establishing an auxiliary flow path between adjacent parallel branches, and its function is to form a pressure compensation channel to reduce the throttling loss of the valve. The second cooling water user 42 refers to a heat exchange device installed on the second parallel branch 4, which can be specifically realized by a motor cooling device of a ship power system, and its function is to absorb the operating heat of specific equipment. The second stop valve 43 refers to a flow control device installed at the outlet end of the second cooling water user 42, which can be specifically realized by an electric control valve, and its function is to adjust the branch resistance by changing the opening degree. The connection point between the second cooling water user 42 and the second stop valve 43 means that the inlet end of the third series branch 10 is arranged in the outlet pipeline section of the cooling water user, which can be specifically realized by a tee joint, and its function is to directly obtain the return water after being used by the user to establish an auxiliary flow path driven by a pressure difference.

[0077] Specifically, when the second cooling water user 42 operates under low conditions, the opening degree of the second stop valve 43 is adjusted to increase the branch resistance. At this time, the return water pressure at the inlet end of the third series branch 10 is higher than the water supply pressure of the adjacent branch, forming a natural pressure difference to drive part of the cooling water to flow through the third series branch 10 to other branches. This flow path converts the unused cooling water pressure in the second parallel branch 4 into auxiliary flow power, avoiding the energy loss caused by excessive throttling of the valve in a single branch. At the same time, the pressure compensation effect of the third series branch 10 balances the pressure distribution differences between different branches, making the flow distribution of each branch closer to the actual demand.

[0078] Compared with the prior art, in the traditional parallel branch structure, each branch only relies on its own valve to adjust the flow rate. When the cooling water demand decreases, it is necessary to significantly close the valve to increase the resistance, resulting in a significant increase in energy loss. In this solution, a third series branch 10 is established between the outlet end of the cooling water user and the stop valve, and the remaining pressure of the used cooling water is utilized to form a cross-branch flow, converting the pressure potential energy originally consumed by the valve into auxiliary flow power, realizing the energy recovery and utilization.

[0079] Through the above technical solution, the present invention solves the problem of insufficient control accuracy of the cooling water flow direction caused by improper connection positions of the parallel branches. By optimizing the access position of the third series branch 10, the pipe network system can automatically balance the pressure distribution differences under different working conditions, reduce the energy loss during the valve adjustment process, and at the same time improve the accuracy of the cooling water flow distribution and the stability of the system operation.

[0080] In this embodiment, the connection point where the other end of the fourth series branch 12 communicates with the third parallel branch 6 is located between the third cooling water user 62 and the fourth stop valve 63.

[0081] Among them, the fourth series branch 12 refers to the pipe section connecting the second multi-way mechanism 11 and the third parallel branch 6, which can be specifically implemented by a DN50 stainless steel pipe and flange connection structure, and is used to establish an auxiliary flow path between the second multi-way mechanism 11 and the outlet of the third cooling water user 62. Among them, the fourth stop valve 63 refers to an electric control valve installed on the outlet side of the third cooling water user 62, which can be specifically implemented by a V-type ball valve with an electric actuator, and is used to dynamically adjust the outlet pressure of the third cooling water user 62. The joint positioning refers to the connection point position between the fourth series branch 12 and the third parallel branch 6, which can be specifically implemented by a tee fitting for branching connection on the outlet pipe section of the third cooling water user 62, so that the fourth series branch 12 is directly connected to the low-pressure area after the user outlet.

[0082] Specifically, when the third cooling water user 62 is operating under low load conditions, the fourth stop valve 63 reduces the outlet throttling resistance by increasing the opening degree. At this time, the fourth series branch 12 conducts the pressure of the second multi-way mechanism 11 to the user outlet area. This pressure conduction effect can reduce the outlet back pressure of the third cooling water user 62, thereby reducing the pressure difference loss of the parallel branch where it is located. At the same time, the connection point between the fourth series branch 12 and the third parallel branch 6 avoids the high-pressure area at the front end of the user inlet, preventing interference with the inlet water flow of the third cooling water user 62.

[0083] In some specific embodiments, the control signal of the fourth stop valve 63 can be closed-loop adjusted based on the feedback value of the outlet pressure sensor of the third cooling water user 62. For example, when the pressure sensor detects that the outlet pressure exceeds 0.3 MPa, the controller will command the fourth stop valve 63 to be fully opened. The second multi-way mechanism 11 can adopt a cast steel water distributor with three outlet ends, and one of the outlet ends is connected to the fourth series branch 12 through a flange.

[0084] Compared with the prior art, when a series branch is set between parallel branches in a traditional cooling system, the connection point is usually arranged at the front end of the user inlet, which will cause the pressure fluctuation between the branches to directly affect the user inlet water flow. In this solution, the connection point of the fourth series branch 12 is moved to the rear end of the user outlet, which can not only utilize the adjustment ability of the fourth stop valve 63 to compensate the outlet pressure, but also establish an auxiliary pressure balance channel through the second multi-way mechanism 11 to optimize the branch resistance while maintaining the stability of the user inlet water.

[0085] Through the above technical solutions, the present application effectively reduces the throttling loss of the parallel branch where the third cooling water user 62 is located under low load conditions, reduces the power consumed by the cooling water pump to overcome the pipeline resistance, and at the same time avoids the fluctuation of the user cooling water flow caused by the pressure interference between the branches.

[0086] In this embodiment, the connection point where the other end of the fourth series branch 12 communicates with the third parallel branch 6 is located between the third cooling water user 62 and the fourth stop valve 63.

[0087] Among them, the fifth series branch 13 refers to an independent pipeline structure connected between the multi-way mechanism and the fourth parallel branch 8, which can be specifically implemented by a metal pipeline connected by flanges or welding. This branch adjusts the return water pressure of the fourth cooling water user 82 through a shunt effect. The connection point being located between the fourth cooling water user 82 and the sixth stop valve 83 means that the access point of this branch is set at the pipe section position between the outlet end of the user equipment and the end valve, and can be specifically connected by a tee fitting. This position selection can ensure the active regulation of the user outlet pressure. Among them, the sixth stop valve 83 refers to a cut-off device installed at the end of the fourth parallel branch 8 for regulating the flow rate of the branch, which can be specifically implemented by an electric control valve or a butterfly valve. Its position setting directly affects the overall resistance characteristics of the branch.

[0088] Specifically, when the operating condition of the fourth cooling water user 82 decreases, the shunt channel of the fifth series branch 13 can be opened to directly transport part of the return water to other branches or the return water main pipe 2. This connection position enables the return water pressure at the user outlet to be adjusted without completely passing through the sixth stop valve 83, effectively avoiding the high pressure drop phenomenon formed in the fully closed or small opening state of the valve. By adjusting the valve opening of the fifth series branch 13, while maintaining the basic flow rate of the fourth parallel branch 8, the excess cooling water can be shunted through the new path to achieve the dynamic balance of the flow rate between the branches.

[0089] Compared with the prior art, the traditional solution only relies on the stop valve at the end of the parallel branch for flow regulation, which is prone to large throttling losses under low operating conditions. This solution constructs a cross-branch pressure balance channel by adding a series branch and setting a connection node downstream of the user outlet, enabling the system to achieve flow distribution without completely relying on the throttling of a single valve, significantly reducing the energy loss caused by valve regulation.

[0090] Through the above technical solution, this application effectively reduces the valve throttling loss of the fourth cooling water user 82 under low load conditions, and realizes the dynamic optimization of the system resistance through the shunt channel. This design enables the cooling water pump to avoid maintaining high power operation to overcome the excessive resistance of a single branch, thereby reducing the overall energy consumption and improving the operation efficiency of the pipe network.

[0091] In a specific embodiment, the elastic cooling water pipe network system of the present invention further includes a plurality of temperature sensors and a plurality of pressure sensors, which are respectively arranged on each branch and are electrically connected to the controller. The working process of the controller is as follows:

[0092] Collect the hot-side temperature data of each parallel branch and cooling user in the cooling water pipe network through a temperature sensor, store it in a pre-established temperature database, and obtain the current hot load status of each user.

[0093] Specifically, collect the temperature data of each parallel branch and the hot side of the cooling user in the cooling water pipe network through a sensor, store it in a pre-established temperature database, and form an original temperature data set. Extract the original temperature data from the temperature database, use the sliding window method to smooth the data, and eliminate instantaneous noise interference. Use the ARIMA model to perform time series analysis on the smoothed data, and calculate the temperature change slope of each branch and user. When the absolute value of the slope exceeds the preset threshold of 0.5 °C / min, use the Isolation Forest algorithm to mark the abnormal branch or user. For the marked abnormal data, use the DBSCAN clustering algorithm with the Euclidean distance as the metric standard to divide the abnormal temperature distribution pattern. Calculate the Pearson correlation coefficient of the temperature sequences of each branch and user. When the coefficient is lower than 0.7, extract the temperature data of this user in the past 24 hours from the temperature database, use linear regression to fit the hot load change curve, and generate the adjustment parameter α. Update the user status field in the temperature database according to the parameter α, and mark the status as needing optimization.

[0094] Compare the hot-side temperature data with the preset operating condition threshold. If the hot-side temperature is lower than the high operating condition threshold, it is determined as the low operating condition, and a low operating condition signal is generated.

[0095] Specifically, obtain the hot-side temperature data from the temperature database, and use the SQL query statement to filter out the temperature data set that meets the time range. Compare the temperature data set with the pre-established high operating condition threshold. If the temperature value is lower than the high operating condition threshold, generate a low operating condition signal. According to the low operating condition signal, use the state machine model to determine the low operating condition state of the cooling system. Obtain the historical low operating condition state data from the temperature database, use the ARIMA model to perform time series analysis, and obtain the operating condition change trend. Through the operating condition change trend, judge whether it continues to be in the low operating condition state. If the duration exceeds the pre-established threshold, generate a stable low operating condition signal. According to the stable low operating condition signal, obtain the associated equipment parameters from the temperature database, use the lookup table for parameter mapping, and determine the operation adjustment parameters. Use the SQL update statement to update the equipment status in the temperature database through the operation adjustment parameters, and obtain the optimized operation state.

[0096] According to the low operating condition signal, extract the serial branch numbers corresponding to the operating condition-sensitive users from the pre-established serial branch connection relationship table, and determine the serial branches to be enabled.

[0097] Specifically, obtain the series branch numbers associated with the condition-sensitive users from the preset branch mapping table, and use a data screening method based on SQL queries to obtain the set of branches to be activated. If there are multiple series branch numbers in the branch set, determine the branch number with the highest priority through the branch allocation rule based on load balancing. According to the branch number with the highest priority, extract the corresponding device parameters from the preset device status table, and use a parameter mapping method based on dictionary mapping to determine the branch activation parameters. If the branch activation parameters meet the operating conditions based on voltage, current, and power thresholds, generate a branch activation signal and update the branch activation status. Through the branch activation status, obtain the historical operation data from the preset operation log database, and use a time series analysis method based on the ARIMA model to obtain the branch operation trend. According to the branch operation trend, if the trend data meets the stability condition based on the preset threshold, generate a stable operation signal and determine the branch stable state. Through the branch stable state, update the status field in the preset branch mapping table to obtain the optimized branch allocation data.

[0098] For the determined series branch, send a control instruction to the corresponding stop valve to open the stop valve in the series branch to obtain the series branch opening state;

[0099] Specifically, for the selected series branch, obtain the corresponding stop valve number from the preset branch configuration table to determine the valve control target. According to the stop valve number, extract the matching control instruction template from the preset device instruction library to generate a control signal. Through the generated control signal, send an opening instruction to the corresponding stop valve to trigger the valve operation to obtain the valve response data. If the valve response data meets the preset opening condition, extract the opening confirmation signal from the valve response data to determine the stop valve opening state. According to the stop valve opening state, update the corresponding branch operation record from the preset branch status database to obtain the branch status data. Through the branch status data, use a time series analysis method to judge the branch operation stability to obtain the stability evaluation result. If the stability evaluation result meets the preset normal operation condition, extract the normal operation signal from the stability evaluation result to determine the series branch stable state.

[0100] Through the series branch opening state, adjust the outlet stop valve of the parallel branch connected to the inlet end of the series branch, close the relevant valves, and generate a parallel branch closing signal;

[0101] Specifically, through the on state of the series branch, extract the list of parallel branch numbers associated with the inlet end from the preset branch connection table. Screen the target parallel branches from the number list according to the branch load threshold to obtain the target branch number data. According to the target branch number data, query the corresponding outlet shut-off valve identifier from the preset valve mapping table to obtain the valve identifier data. Through the valve identifier data, match the predefined closing instruction template from the device instruction library to generate an RS485 control signal containing the valve address code. Use the control signal to send a closing instruction to the target outlet shut-off valve and receive the position sensor data returned by the valve. When the sensor value is lower than 5% opening and lasts for 300 milliseconds, it is determined to be in the closed state, and a closing confirmation signal is generated. According to the closing confirmation signal, execute the UPDATE statement in the MySQL branch status database to update the target branch status field to closed. Extract the current sampling data of this branch in the recent 30 minutes, perform the ADF stationarity test using the statsmodels library, and generate a stability compliance flag when the p-value is less than 0.05. According to the stability compliance flag, insert a complete operation record containing the timestamp, operator ID, and branch number into the system log table.

[0102] According to the parallel branch closing signal, adjust the inlet regulating valve of the parallel branch connected to the outlet end of the series branch, gradually reduce the valve opening, and obtain the series-parallel hybrid structure operating state;

[0103] Specifically, extract the real-time flow data of the parallel branches from the branch status database, calculate the flow variance and mean of each branch, and generate the flow distribution characteristic data. According to the branch numbers in the flow characteristic data, match the monitoring template of the corresponding inlet regulating valve from the device monitoring library to obtain the valve opening and pressure fluctuation data. When the valve pressure fluctuation is less than 0.1 MPa and the opening change frequency is lower than 5 times per minute, it is determined to be in the stable state, and a valve normal signal is output. According to the valve normal signal, retrieve the start-stop status of all branches in the series-parallel structure to generate a working status data table. Using the working status data as the input, obtain the rated load parameters of each branch from the system configuration table, calculate the current load deviation rate, and generate a load adjustment instruction. Compare the load adjustment instruction with the current monitoring data of the series branch. If the current difference exceeds 10 A, trigger a linkage control signal to adjust the resistance value of the series branch. Record the flow, pressure, and current data before and after the adjustment, sort them by timestamp, and generate a structured operation log. Extract the average flow, pressure peak, and load rate per hour from the operation log to form a three-dimensional time series array. Use the K-means algorithm to cluster the array, divide it into three types of operating trends: stable, fluctuating, and abnormal, and output the cluster center coordinates as the stability trend data.

[0104] Real-time monitor the change trend of the hot side temperature of each cooling user, calculate the temperature change rate, and generate the temperature adjustment demand;

[0105] Specifically, the hot-side temperature data of each cooling user is collected in real time, and the temperature trend data is obtained by calculating the moving window mean with a window size of 30 seconds. According to the temperature trend data, the temperature change rate between adjacent windows is calculated to obtain the change rate data. The temperature change rate threshold corresponding to the cooling user is extracted from the preset adjustment requirement database, and the database fields include user ID, threshold, and time window. If the change rate data exceeds the threshold, a temperature adjustment signal containing the user ID and the adjustment amount is generated. According to the user ID in the temperature adjustment signal, the associated valve ID is obtained from the pipe network topology table, and the topology table fields include user ID, valve ID, and branch type. The valve control instruction template is obtained from the equipment control library, and the template fields include valve ID, opening increment, and execution time. The template is filled to generate the valve opening adjustment instruction. After executing the valve opening adjustment instruction, based on the series-parallel topology of the pipe network, the Hardy-Cross method is used to iteratively calculate the flow distribution of each branch to obtain the flow distribution data. The standard deviation of the flow rates of all branches is calculated. If the standard deviation exceeds the preset value of 0.2 m 3 / h, it is marked as the load imbalance state. According to the load imbalance state, the allowable flow range and the pressure upper limit parameter of the corresponding branch are extracted from the operation status database, and an optimization signal containing the target flow rate and pressure value is generated. The slope of the key parameters in the past 5 minutes is calculated by linear regression. If the absolute value of the slope is greater than 0.5 / minute (for example, if the key parameter is flow rate, the unit is 0.5 m 3 / minute), it is determined as the system instability state.

[0106] Dynamically adjust the opening of the regulating valve at the inlet end of the series branch according to the temperature adjustment requirement, generate the valve opening control signal, and obtain the optimized cooling water flow distribution;

[0107] Specifically, if the branch flow distribution exceeds the preset equilibrium threshold, obtain the corresponding flow adjustment strategy from the flow balance algorithm library, generate a flow optimization signal, and determine the adjusted flow distribution data. According to the adjusted flow distribution data, extract the operation parameter template corresponding to the branch from the operation status database, generate a parameter adjustment signal, and obtain the optimized operation parameter data. If the operation parameter data does not match the preset stability threshold, calculate the parameter change trend through the ARIMA model to determine the system stability trend data. According to the stability trend data, obtain the instruction template associated with the valve state from the control instruction template library, generate a valve fine-tuning signal, and obtain the fine-tuned valve opening data. Through the valve opening data, analyze the branch flow change using the least squares method, generate a flow balance signal, and determine the balanced flow distribution data. If the balanced flow distribution data does not reach the preset load balance threshold, extract the standby adjustment strategy from the adjustment demand database, generate a standby control signal, and obtain the final system operation status data. According to the system operation status data, calculate the operation status fluctuation trend using the ARIMA model to determine the system long-term stability data.

[0108] Update the operating frequency of the cooling water pump through the optimized cooling water flow distribution to obtain an energy-saving operation state;

[0109] Specifically, if the cooling water flow distribution exceeds the preset equilibrium threshold, obtain the corresponding distribution strategy from the flow distribution database, generate a flow adjustment signal according to the adjustment parameters in the distribution strategy, and determine the balanced flow distribution data. According to the balanced flow distribution data, perform time series analysis using the ARIMA model to calculate the flow change trend and obtain the flow stability data. If the flow stability data does not match the preset stability threshold, extract the frequency template corresponding to the cooling water pump from the operation parameter database, generate a frequency adjustment signal according to the adjustment parameters in the frequency template, and determine the updated pump frequency data. Through the updated pump frequency data, perform load balancing using the weighted round-robin algorithm, analyze the system load change, generate a load optimization signal, and obtain the balanced load distribution data. If the balanced load distribution data does not reach the preset load threshold, obtain the standby frequency adjustment strategy from the standby strategy database, generate a standby control signal according to the adjustment parameters in the standby strategy, and determine the final pump operating frequency data. According to the final pump operating frequency data, perform condition monitoring using the vibration spectrum analysis method, analyze the pump operation state change, generate a condition optimization signal, and obtain the updated system operation status data. Through the updated system operation status data, perform trend analysis using the moving average method to calculate the long-term operation trend and determine the system stability data.

[0110] In another embodiment, the present invention provides a control method for an elastic cooling water pipe network system, which is applied to the above-mentioned elastic cooling water pipe network system. The control method for the elastic cooling water pipe network system includes:

[0111] Real-time monitoring of the system operating conditions;

[0112] When it is determined to be a high operating condition, close the shut-off valves of all cooling series branches, so that each cooling parallel branch operates independently in a full-parallel mode;

[0113] When it is determined to be a low operating condition, perform the following operations:

[0114] Open the shut-off valve of at least one cooling series branch;

[0115] Close the outlet shut-off valve of the cooling parallel branch connected to the inlet end of the cooling series branch;

[0116] Reduce or fully close the opening of the inlet regulating valve of the cooling parallel branch connected to the outlet end of the cooling series branch, so that the pipe network switches to a series-parallel hybrid operation mode;

[0117] Real-time monitor the hot-side temperature of each cooling user, and dynamically adjust the opening of the inlet regulating valve of the corresponding cooling parallel branch according to the temperature feedback.

[0118] In practical applications, the elastic cooling water pipe network system of the present invention includes: a water supply main pipe 1, cooling parallel branches, a return water main pipe 2, cooling series branches, etc. The cooling parallel branches include an inlet regulating valve, a cooling user, and an outlet shut-off valve, wherein the inlet regulating valve is connected to the water supply main pipe 1, and the outlet shut-off valve is connected to the return water main pipe 2. The cooling series branch includes a shut-off valve and is connected to two or more parallel branches. The inlet end is connected to the pipe section between the cooling user of the parallel branch and the outlet shut-off valve, and the outlet end is connected to the pipe section between the inlet regulating valve of the parallel branch and the cooling user. Among them, multiple cooling series branches can form a series relationship. Among them, the inlet end of the cooling series branch can be connected to one or more parallel branches, and the outlet end can be connected to one or more parallel branches. Among them, the operation mode is specifically: under high operating conditions, each parallel branch operates in a full-parallel mode, and the shut-off valve in the series branch is closed; under low operating conditions, open the shut-off valve of the series branch, close the outlet shut-off valve of the parallel branch connected to its inlet end, and reduce or fully close the opening of the regulating valve at the inlet end of the parallel branch connected to its outlet end, so that the cooling water pipe network becomes a series-parallel hybrid structure. Among them, the opening of the above-mentioned regulating valve is adjusted by monitoring the hot-side temperature of the cooling user.

[0119] Such as Figure 1As shown, users e and f are the same two cooling users, and the heat exchanger is a shell-and-tube heat exchanger. The temperature of the hot-side fluid is 60°C, and the mixed temperature after cooling should not be higher than 45°C. Under the rated condition, the hot-side flow rate is 36.5 kg / s; the rated cold-side flow rate is 36 kg / s, and the inlet temperature is 20°C. The design parameters of the two users are calculated using the HTRI software, and the design pressure drop is 47.06 kPa. For the cooling water network, there are users that do not change with the operating conditions. The valve flow resistance in the non-throttling state is ignored, so the pressure difference between the water supply main pipe 1 and the return water main pipe 2 remains at 47.06 kPa.

[0120] Under low load conditions, the heat load on the hot side drops to 50%, and the corresponding total flow rate drops to 50%. The following considers different operating modes:

[0121] 1. Operate a single user e. Then this user still operates under the rated condition, and the cooling water flow rate of this branch is 36 kg / s; the opening of the regulating valve at the inlet of user f is set to 0, and the cooling water flow rate of this branch is 0. At this time, the total cooling water flow rate of the two branches is 36 kg / s.

[0122] 2. Operate users e and f in parallel. The hot-side flow rate is evenly distributed, which is 18.25 kg / s. Through the HTRI software, the required cold-side flow rate can be calculated to be 11.45 kg / s. Since the flow rate and pressure drop of each branch are lower than the rated condition, it is necessary to reduce the opening of the inlet regulating valve for both branches. At this time, the total cooling water flow rate of the two branches is 22.9 kg / s.

[0123] 3. Operate users e and f in series-parallel. Open the stop valve of the series branch. The hot-side flow rates of users e and f are still evenly distributed. Close the outlet stop valve on branch e of the parallel branch. When the cooling water flow rate of branch e is adjusted to 17.175 kg / s and the cooling water flow rate of branch f is calculated to be 3.5 kg / s, the mixed temperature at the outlet of the hot sides of users e and f is 45°C, meeting the cooling requirements. At this time, the total cooling water flow rate of branch e and branch f is 20.675 kg / s, which is 42.57% lower than the operating mode 1 and 9.72% lower than the operating mode (2).

[0124]

[0125]

[0126] The foregoing description of the specific exemplary embodiments of the present invention is for purposes of illustration and exemplification. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is apparent that many modifications and variations are possible in light of the above teaching. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the invention and its practical application, so that those skilled in the art can implement and utilize the various different exemplary embodiments of the invention, as well as various different selections and modifications. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. An elastic cooling water pipe network system, characterized in that, Comprising: Main water supply pipe; Main return water pipe; The first parallel branch, one end of the first parallel branch is communicated with the main water supply pipe, the other end is connected to the main return water pipe, and a first regulating valve, a first cooling water user and a first stop valve are sequentially arranged on the first parallel branch; The second parallel branch, one end of the second parallel branch is communicated with the main water supply pipe, the other end is connected to the main return water pipe, and a second regulating valve, a second cooling water user and a second stop valve are sequentially arranged on the second parallel branch; and The first series branch, one end of the first series branch is communicated with the first parallel branch, the other end is connected to the second parallel branch, wherein a third stop valve is arranged on the first series branch.

2. The elastic cooling water pipe network system according to claim 1, wherein Further comprising: The third parallel branch, one end of the third parallel branch is communicated with the main water supply pipe, the other end is connected to the main return water pipe, and a third regulating valve, a third cooling water user and a fourth stop valve are sequentially arranged on the third parallel branch; and The second series branch, one end of the second series branch is communicated with the second parallel branch, the other end is connected to the third parallel branch, and a fifth stop valve is arranged on the second series branch.

3. The elastic cooling water pipe network system according to claim 2, wherein, Further comprising a controller, electrically connected to the first regulating valve, the first stop valve, the second regulating valve, the second stop valve, the third stop valve, the third regulating valve, the fourth stop valve and the fifth stop valve respectively.

4. The elastic cooling water pipe network system according to claim 1, wherein The connection point where the one end of the first series branch is communicated with the first parallel branch is located between the first cooling water user and the first stop valve, and the connection point where the other end of the first series branch is communicated with the second parallel branch is located between the second cooling water user and the second stop valve.

5. The elastic cooling water pipe network system according to claim 2, characterized in that, The connection point where the one end of the second series branch is communicated with the second parallel branch is located between the second cooling water user and the second stop valve, and the connection point where the other end of the second series branch is communicated with the third parallel branch is located between the third cooling water user and the fourth stop valve.

6. The elastic cooling water pipe network system according to claim 2, characterized in that, Further comprising: The fourth parallel branch, one end of the fourth parallel branch is communicated with the main water supply pipe, the other end is connected to the main return water pipe, and a fourth regulating valve, a fourth cooling water user and a sixth stop valve are sequentially arranged on the fourth parallel branch; The first multi-way mechanism, the first end of the first multi-way mechanism is used for being communicated with the other end of the first series branch, and the second end is used for being communicated with the one end of the second series branch; The third series branch, one end of the third series branch is communicated with the second parallel branch, and the other end is connected to the second end of the first multi-way mechanism; The second multi-way mechanism, the first end of the second multi-way mechanism is used for being communicated with the other end of the second series branch; The fourth series branch, one end of the fourth series branch is connected to the second end of the second multi-way mechanism, and the other end is communicated with the third parallel branch; and The fifth series branch, one end of the fifth series branch is connected to the third end of the second multi-way mechanism, and the other end is connected to the fourth parallel branch.

7. The elastic cooling water pipe network system according to claim 6, wherein, The controller is electrically connected to the fourth regulating valve and the sixth stop valve respectively.

8. The elastic cooling water pipe network system according to claim 6, characterized in that, The connection point where the one end of the third series branch is connected to the second parallel branch is located between the second cooling water user and the second stop valve.

9. The elastic cooling water pipe network system according to claim 7, wherein, The connection point where the other end of the fourth series branch is connected to the third parallel branch is located between the third cooling water user and the fourth stop valve; Among them, the connection point where the other end of the fifth series branch is connected to the fourth parallel branch is located between the fourth cooling water user and the sixth stop valve.

10. A control method for an elastic cooling water pipe network system, which is applied to the elastic cooling water pipe network system according to any one of claims 1 to 9, characterized in that, The control method of the elastic cooling water pipe network system includes: Real-time monitoring of the system working conditions; When it is determined to be a high working condition, close the stop valves of all cooling series branches, and make each cooling parallel branch operate independently in a full-parallel mode; When it is determined to be a low working condition, perform the following operations: Open the stop valve of at least one cooling series branch; Close the outlet stop valve of the cooling parallel branch connected to the inlet end of the cooling series branch; Reduce or completely close the opening of the inlet regulating valve of the cooling parallel branch connected to the outlet end of the cooling series branch, so that the pipe network switches to a series-parallel hybrid operation mode; Real-time monitor the hot-side temperature of each cooling user, and dynamically adjust the opening of the inlet regulating valve of the corresponding cooling parallel branch according to the temperature feedback.

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