Regional cooling system simulation test device and test method

Abstract

According to the regional cooling system simulation test device and test method provided by the invention, a scaling test device is constructed by adopting the similarity of hydraulic characteristics, and a real cooling system is replaced to carry out a control strategy simulation test, a multi-user steady-state flow distribution test and a multi-working-condition dynamic flow balance test; static pressure loss or pipeline on-way resistance loss is simulated by adopting the coiled pipe, real local throttling loss of cooling equipment is simulated by adopting the throttling orifice plate, the scale and cost of the test device are reduced, the occupied space in a simulation area cooling system and the test device is small, valves and sensors are convenient to operate and check, and the test efficiency is improved. The test device is easy to build and install, the debugging period is short, and the test device tests the optimal control strategy of the automatic regulating valve.

Description

Technical Field

[0001] The invention relates to the technical field of ship and marine engineering manufacturing, and in particular to a regional cooling system simulation test device and a test method. Background Art

[0002] On large marine transport platforms such as engineering ships, marine engineering, luxury cruise ships, and military ships, there are a large number of equipment of various types that require seawater cooling to ensure normal operation. These equipment are widely distributed on board, and the required cooling water volume and water supply pressure vary greatly, and there are many operating conditions.

[0003] There are two common ship cooling system design schemes: one is independent cooling for a single device; the other is to partition the cooling equipment of the entire ship and centrally cool the equipment in the local area. The independent cooling scheme has a simple system and few technical problems, but it will lead to a large number and specifications of cooling water pumps for the entire ship, a large number of systems and increased management work, while the regional cooling scheme reduces the number of seawater cooling systems and overcomes the shortcomings of the independent cooling scheme.

[0004] At present, most district cooling systems use manually controlled valves. During the system debugging phase, manually adjusting valves takes a long time and the more equipment there is, the more difficult it is to adjust the system. If many devices in the district cooling system are not running at the same time, it is necessary to manually adjust the system balance again when the working conditions change. Manual adjustment is time-consuming, labor-intensive and difficult to adjust. Summary of the invention

[0005] In order to test the control strategy, all the equipment that needs to be cooled in the regional cooling system are concentrated together for joint debugging test. Therefore, the technical problem that the technical solution of the present invention needs to solve is:

[0006] 1. The flow characteristics of each branch and the opening of the regulating valve are highly coupled to each other, and one move affects the whole system;

[0007] 2. At the same time, there is a certain lag in flow response. After the valve opening is adjusted, the flow takes a certain amount of time to respond and stabilize;

[0008] 3. The cooling equipment is large in size, which makes it inconvenient to carry and install;

[0009] 4. There are many cooled equipments and the actual ship is arranged on multiple decks, which places high demands on the joint debugging test site;

[0010] 5. The valves and sensors in the test system are widely distributed, making it difficult to operate and read data.

[0011] 6. The construction and debugging cycle of the joint test system is long.

[0012] In order to solve the above technical problems, the technical solution of the present invention provides a regional cooling system simulation test device, comprising:

[0013] One end of the centrifugal pump discharge pipeline, one end of the bypass branch, one end of the first cooling branch, one end of the second cooling branch and one end of the third cooling branch are all connected to the water tank, the other end of the centrifugal pump discharge pipeline is respectively connected to the other end of the bypass branch and one end of the main pipeline, and the other end of the main pipeline is respectively connected to the other end of the first cooling branch, the other end of the second cooling branch and the other end of the third cooling branch;

[0014] The first cooling branch, the second cooling branch and the third cooling branch are all provided with a static balancing valve, a flow meter and a remote control flow regulating valve;

[0015] The first cooling branch, the second cooling branch and the third cooling branch are respectively connected to sub-branches having the same number as the cooled equipment, and each sub-branch is provided with a static balancing valve, a pressure sensor and a flow meter;

[0016] The main pipeline is equipped with a flow meter;

[0017] The bypass branch is equipped with a flow meter, a remote control flow regulating valve and a pressure sensor;

[0018] A centrifugal pump is provided in the centrifugal pump discharge pipeline;

[0019] One end of the centrifugal pump discharge pipeline sucks cooling water from the water tank and flows into the main line and the bypass branch respectively. The cooling water flowing into the bypass branch flows back to the water tank, and the cooling water flowing into the main line flows back to the water tank through the first cooling branch, the second cooling branch, the third cooling branch and the corresponding sub-branches respectively.

[0020] The console controls the activation of the static balancing valve, the remote control flow regulating valve and the centrifugal pump to control the conduction of the corresponding pipelines. Based on the data collected from the flow meter and pressure sensor, it compares whether the corresponding pipelines have reached the user's preset values, and uses the similarity of hydraulic characteristics to build a scaled-down test to simulate the steady-state flow distribution test of multiple cooling equipment and the dynamic flow balance test of multiple working conditions. The optimal valve control strategy is formulated based on the cycle and step size of the remote control flow regulating valve obtained during the test, and the time taken for the flow meter and pressure sensor to reach the user's preset values.

[0021] Preferably, the main pipeline is further provided with serpentine pipes, and the number of the serpentine pipes is determined by calculating the serpentine pipe resistance data based on the simulated pipeline along-line resistance loss characteristics to simulate the static pressure loss or pipeline along-line resistance loss.

[0022] Preferably, the sub-branch is further provided with a throttling orifice plate, and the opening size of the throttling orifice plate is determined according to the local resistance loss characteristics of the simulated cooled equipment to simulate the actual local throttling loss of the cooling equipment.

[0023] Preferably, the parameters of the centrifugal pump and the pipe diameter size of the centrifugal pump discharge pipe are determined by performing a scaled-down test based on the principle of similarity of hydraulic characteristics.

[0024] Preferably, each of the sub-branch, the first cooling branch, the second cooling branch, the third cooling branch, the bypass branch and the centrifugal pump discharge pipeline is provided with a stop check valve for one-way flow of cooling water.

[0025] Preferably, the static balancing valve is a flange-type static balancing valve, which is pre-adjusted by professional equipment according to the requirements of flow and pressure difference in the first cooling branch, the second cooling branch and the third cooling branch before installation to ensure that the pressure on both sides of the flange-type static balancing valve is relatively balanced.

[0026] Preferably, the console includes a computer, a PLC controller and a switching power supply, and is internally provided with three input interfaces of AC380V, AC220V and DC24V to reduce interference between input currents and ensure the accuracy of test data.

[0027] Preferably, the console also includes a human-machine interface for obtaining the user input of the user preset value and displaying the data of the pressure sensor and flow meter, the motor operating status of the centrifugal pump, the opening and closing status of the static balancing valve and the opening and closing status of the remote control flow regulating valve.

[0028] The technical solution of the present invention also provides a regional cooling system simulation test method, using a regional cooling system simulation test device as described above, comprising the following steps:

[0029] The steady-state flow distribution test of multiple cooling equipment is as follows:

[0030] The control console obtains the user preset value, and controls the remote control flow regulating valve of the bypass branch to open, closes the remote control flow regulating valves of the first cooling branch, the second cooling branch and the third cooling branch, starts the centrifugal pump, and adjusts the remote control flow regulating valve of the bypass branch according to the user preset value, so that when the cooling water in the water tank flows into the centrifugal pump discharge pipeline and then flows into the main line, the flow meter of the main line and the pressure sensor data of the bypass branch are at the user preset value, and gradually opens the remote control flow regulating valves on the first cooling branch, the second cooling branch and the third cooling branch and cooperates to adjust the remote control flow regulating valve on the bypass branch, and gradually stabilizes the flow meter data of the first cooling branch, the second cooling branch and the third cooling branch and the cooled equipment of the sub-branches of each branch to the user preset value, and observes and records the cycle and step length of the remote control flow regulating valve, and the time taken for the flow meter and the pressure sensor to reach the user preset value;

[0031] After the centrifugal pump is stopped and the remote control flow regulating valve is closed at the control console, the user preset value is obtained again. After the flow meter of the main line and the pressure sensor data of the bypass branch reach the user preset value, the remote control flow regulating valves of the first cooling branch and the third cooling branch are gradually opened and the remote control flow regulating valve on the bypass branch is adjusted in coordination. The flow meter data of the cooled equipment of the first cooling branch and the third cooling branch and the neutron branches of each branch are observed to see whether they can be stabilized to the user preset value and the deviation is between 0±5%. The cycle and step length of the remote control flow regulating valve, and the time taken by the flow meter and the pressure sensor to reach the user preset value are observed and recorded.

[0032] After the centrifugal pump is stopped and the remote control flow regulating valve is closed at the control console, the user preset value is obtained again. After the flow meter of the main line and the pressure sensor data of the bypass branch reach the user preset value, the remote control flow regulating valves of the second cooling branch and the third cooling branch are gradually opened and the remote control flow regulating valve on the bypass branch is adjusted in coordination. The flow meter data of the second cooling branch and the third cooling branch and the cooled equipment of the sub-branches of each branch are observed to see whether they can be stabilized to the user preset value and the deviation is between 0±5%. The cycle and step length of the remote control flow regulating valve, and the time taken by the flow meter and the pressure sensor to reach the user preset value are observed and recorded.

[0033] The multi-condition dynamic flow balance test is as follows:

[0034] After the first cooling branch, the second cooling branch and the third cooling branch are all stable, close the sub-branches corresponding to the cooled devices with even numbers in the first cooling branch, and close the sub-branches corresponding to the cooled devices with odd numbers in the second cooling branch. At this time, the flow meter will change. Adjust the remote control flow regulating valves on the bypass branch, the first cooling branch, the second cooling branch and the third cooling branch. Observe whether the flow meter data of the cooled devices in the first cooling branch, the second cooling branch and the third cooling branch and the sub-branches in each branch can stabilize to the user's preset value, and whether the deviation is between 0±5%. Observe and record the cycle and step length of the remote control flow regulating valve, and the time taken for the flow meter and pressure sensor to reach the user's preset value.

[0035] After the centrifugal pump is stopped and the remote control flow regulating valve is closed at the control console, after the first cooling branch, the second cooling branch and the third cooling branch are all stable, close the sub-branch corresponding to the cooled equipment with an odd number in the first cooling branch, and close the sub-branch corresponding to the cooled equipment with an even number in the second cooling branch. At this time, the flow meter will change, and the remote control flow regulating valve on the bypass branch, the first cooling branch, the second cooling branch and the third cooling branch is adjusted. Observe whether the flow meter data of the cooled equipment in the first cooling branch, the second cooling branch and the third cooling branch and the sub-branches of each branch can be stabilized to the user's preset value, and the deviation is between 0±5%. Observe and record the cycle and step length of the remote control flow regulating valve, and the time taken by the flow meter and pressure sensor to reach the user's preset value;

[0036] After the centrifugal pump is stopped and the remote control flow regulating valve is closed at the control console, after the first cooling branch, the second cooling branch and the third cooling branch are all stable, the sub-branch corresponding to the cooled equipment in the first cooling branch is closed. At this time, the flow meter will change. Adjust the remote control flow regulating valves on the bypass branch, the second cooling branch and the third cooling branch. Observe whether the flow meter data of the cooled equipment in the second cooling branch and the third cooling branch and the sub-branches of each branch can stabilize to the user's preset value, and whether the deviation is between 0±5%. Observe and record the cycle and step length of the remote control flow regulating valve, and the time taken by the flow meter and pressure sensor to reach the user's preset value;

[0037] The optimal valve control strategy is formulated based on the data from steady-state flow distribution tests on multiple cooling equipment and dynamic flow balance tests under multiple operating conditions.

[0038] Preferably, the method comprises: if the data of the flow meter of the cooled device fails to stabilize to the user preset value and / or exceeds the deviation, adjusting the corresponding remote control flow regulating valve until it stabilizes to the user preset value and satisfies the deviation.

[0039] The technical solution of the present invention proposes a regional cooling system simulation test device and test method, which adopts automatic control means to solve the difficulties faced by manually adjusting the regional cooling system, so as to carry out tests such as regional multi-user steady-state flow distribution test and multi-operating condition dynamic flow balance test, verify the effectiveness and reliability of the control strategy, and resolve technical risks in advance. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic diagram of a regional cooling system simulation test device provided by an embodiment of the present invention;

[0041] Figure 2 A flowchart of an operation process in which the first cooling branch, the second cooling branch and the third cooling branch are all turned on in a simulation test method of a regional cooling system provided by an embodiment of the present invention;

[0042] Figure 3 A flowchart of the operation of opening the first cooling branch and the third cooling branch in a simulation test method for a regional cooling system provided by an embodiment of the present invention;

[0043] Figure 4 A flowchart of the operation of opening the second cooling branch and the third cooling branch in a simulation test method for a regional cooling system provided by an embodiment of the present invention;

[0044] Figure 5 A flowchart of the operation of a multi-condition dynamic flow balance test 1 provided in an embodiment of the present invention;

[0045] Figure 6 A flowchart of the multi-condition dynamic flow balance test 2 operation provided by an embodiment of the present invention;

[0046] Figure 7 A flowchart of the multi-condition dynamic flow balance test 3 operation provided by an embodiment of the present invention;

[0047] Reference numerals:

[0048] 1-Control console, 2-Centrifugal pump, 3-Stop check valve, 4-Flow meter, 5-Stop valve,

[0049] 6-remote control flow control valve, 7-pressure sensor, 8-static balance valve, 9-throttling orifice plate, 10-serpentine tube. DETAILED DESCRIPTION

[0050] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0051] The embodiment of the present invention provides a regional cooling system simulation test device, including: a control console 1, a centrifugal pump 2, a stop check valve 3, a flow meter 4, a stop valve 5, a remote control flow control valve 6, a pressure sensor 7, a static balance valve 8, a throttling orifice plate 9, a serpentine pipe 10, a water tank and other basic components. The number of branches of various regional cooling systems varies. For details, see the schematic diagram of a typical regional cooling system simulation test device. Figure 1The typical regional cooling system simulation test device includes a main pipeline and multiple branches. The multiple branches are divided into a centrifugal pump discharge pipeline, a bypass branch, a first cooling branch, a second cooling branch, and a third cooling branch from bottom to top. Each of the first cooling branch, the second cooling branch, and the third cooling branch has a different number of cooling water users (cooled equipment). The first cooling branch contains 1 to 6 users, the second cooling branch contains 7 to 8 users, and the third cooling branch contains 9 to 11 users.

[0052] One end of the centrifugal pump discharge pipeline, one end of the bypass branch, one end of the first cooling branch, one end of the second cooling branch and one end of the third cooling branch are all connected to the water tank, the other end of the centrifugal pump discharge pipeline is respectively connected to the other end of the bypass branch and one end of the main pipeline, and the other end of the main pipeline is respectively connected to the other end of the first cooling branch, the other end of the second cooling branch and the other end of the third cooling branch.

[0053] A flow meter 4 and a plurality of serpentine pipes 10 are provided on the main pipe. The flow meter 4 is located at the other end of the first cooling branch, the other end of the second cooling branch and the other end of the third cooling branch.

[0054] The first cooling branch, the second cooling branch and the third cooling branch are respectively provided with a static balancing valve 8, a flow meter 4 and a remote control flow regulating valve 6. The remote control flow regulating valve 6 is connected to the sub-branch inlets corresponding to the first cooling branch, the second cooling branch and the third cooling branch to control the number of cooled equipment. Each sub-branch is provided with a static balancing valve 8, a throttling orifice plate 9, a flow meter 4, a pressure sensor 7 and a stop check valve 3. The outlets of multiple sub-branches are merged according to the corresponding first cooling branch, the second cooling branch and the third cooling branch, and are respectively connected to the stop check valve 3.

[0055] The bypass branch is provided with a flow meter 4, a stop valve 5, a remote control flow regulating valve 6, a pressure sensor 7 and a stop check valve 3.

[0056] One end of the centrifugal pump discharge pipeline sucks cooling water from the water tank and flows into the main line and the bypass branch respectively. The cooling water flowing into the bypass branch flows back to the water tank, and the cooling water flowing into the main line flows back to the water tank through the first cooling branch, the second cooling branch, the third cooling branch and the corresponding sub-branches.

[0057] The parameters of the centrifugal pump 2 and the pipe diameter size of the centrifugal pump discharge pipe are determined by performing a scaled-down test based on the principle of similarity of hydraulic characteristics.

[0058] The bypass branch adjusts the flow into the main branch by adjusting the remote control flow regulating valve 6, and then adjusts the flow into the first cooling branch, the second cooling branch and the third cooling branch to ensure that the water volume in each branch meets the system test requirements.

[0059] The number of the serpentine pipes 10 is determined by calculating the serpentine pipe resistance data based on the resistance loss characteristics along the simulated pipeline.

[0060] The opening size of the throttling orifice plate 9 is determined based on the local resistance loss characteristics of the simulated cooled equipment.

[0061] The remote control flow regulating valve 6 is an electric flow regulating valve, which is connected to the control console 1. The electric flow regulating valve is controlled by the control console 1 to adjust the flow changes of the bypass branch, the first cooling branch, the second cooling branch and the third cooling branch, simulating a multi-user steady-state flow distribution test and a multi-operating condition dynamic flow balance test.

[0062] The static balancing valve 8 is flange type, which makes the system in a static balance state after operation. During installation, according to the requirements of flow and pressure difference in the first cooling branch, the second cooling branch and the third cooling branch, pre-adjustment is performed through professional equipment to ensure that the pressure on both sides is relatively balanced.

[0063] The control console 1 is connected to the centrifugal pump, pressure sensor 7, flow meter 4, centrifugal pump 2, stop check valve 3, stop valve 5, remote control flow regulating valve 6 and static balance valve 8 as a control machine. By obtaining the data of pressure sensor 7 and flow meter 4, the centrifugal pump 2, stop check valve 3, stop valve 5, remote control flow regulating valve 6 and static balance valve 8 are debugged to realize automatic control of the system. The control console 1 is mainly composed of a computer, a PLC controller, a switching power supply, etc. There are three input interfaces of AC380V, AC220V and DC24V inside the control console 1. A series of protective measures are used to reduce the interference between input currents to ensure the accuracy of the test data.

[0064] The human-machine interface of the console 1 displays: the real-time values ​​of pressure and flow of the main line, bypass branch, first cooling branch, second cooling branch, third cooling branch and multiple sub-branches, the motor operation status of the centrifugal pump 2, the opening and closing status of the stop check valve 3, the stop valve 5, the remote control flow regulating valve 6 and the static balancing valve 8, the main line pressure parameter setting box, the flow value setting box of the bypass branch, the first cooling branch, the second cooling branch and the third cooling branch, and the motor speed setting box of the centrifugal pump.

[0065] The embodiment of the present invention further provides a regional cooling system simulation test method, which uses the regional cooling system simulation test device as described above, and includes the following steps:

[0066] 1) Multi-user steady-state traffic distribution experiment.

[0067] The first cooling branch, the second cooling branch and the third cooling branch are all opened to conduct a multi-user steady-state flow distribution test. Figure 2 shown.

[0068] Turn on console 1, and set parameters through the flow value setting boxes of the bypass branch, the first cooling branch, the second cooling branch and the third cooling branch, the motor speed setting box of the centrifugal pump and the main line pressure parameter setting box on the human-machine interface.

[0069] During operation, the control console 1 controls the remote control flow regulating valve 6 of the bypass branch to open, closes the remote control flow regulating valve 6 of the first cooling branch, the second cooling branch and the third cooling branch, starts the centrifugal pump 2 made of stainless steel, so that the centrifugal pump discharge pipeline flows into cooling water, and automatically adjusts the electric flow regulating valve through the control console 1 to stabilize the pressure and flow of the main line at the set value, and then automatically and gradually opens the remote control flow regulating valve 6 on the first cooling branch, the second cooling branch and the third cooling branch, and cooperates to adjust the remote control flow regulating valve 6 on the bypass branch, so that the flow of users in the first cooling branch, the second cooling branch and the third cooling branch and the sub-branch of each branch is gradually stabilized to the set value. Observe and record whether the flow of users in the first cooling branch, the second cooling branch and the third cooling branch and the sub-branch of each branch can reach the set value. After the test, press the stop button through the control console 1, the control console 1 automatically stops the centrifugal pump 2, and then closes the remote control flow regulating valve 6.

[0070] The first cooling branch and the third cooling branch are opened, and the second cooling branch is closed. Figure 3 shown.

[0071] Turn on the control console 1, and set the parameters through the flow value setting boxes of the bypass branch, the first cooling branch and the third cooling branch, the motor speed setting box of the centrifugal pump and the main line pressure parameter setting box on the human-machine interface.

[0072] During operation, the control console 1 controls the remote control flow regulating valve 6 of the bypass branch to open, closes the remote control flow regulating valve 6 of the first cooling branch, the second cooling branch and the third cooling branch, starts the centrifugal pump 2 made of stainless steel, so that the centrifugal pump discharge pipeline flows into cooling water, and automatically adjusts the electric flow regulating valve through the control console 1 to stabilize the pressure and flow of the main line at the set value, and then automatically and gradually opens the remote control flow regulating valve 6 on the first cooling branch and the third cooling branch, and cooperates to adjust the remote control flow regulating valve 6 on the bypass branch, so that the flow of users in the first cooling branch and the third cooling branch and the corresponding branches is gradually stabilized to the set value. Observe and record whether the flow of users in the first cooling branch and the third cooling branch and the sub-branches of each branch can reach the set value, and the deviation is between 0±5%. After the test, press the stop button by the control console 1, and the control console 1 automatically stops the centrifugal pump 2 and then closes the remote control flow regulating valve 6.

[0073] The second cooling branch and the third cooling branch are opened, and the first cooling branch is closed. Figure 4 shown.

[0074] Turn on the control console 1, and set the parameters through the flow value setting boxes of the bypass branch, the second cooling branch and the third cooling branch, the motor speed setting box of the centrifugal pump and the main line pressure parameter setting box on the human-machine interface.

[0075] During operation, the control console 1 controls the remote control flow regulating valve 6 of the bypass branch to open, closes the remote control flow regulating valve 6 of the first cooling branch, the second cooling branch and the third cooling branch, starts the centrifugal pump 2 made of stainless steel, so that the centrifugal pump discharge pipeline flows into cooling water, and automatically adjusts the electric flow regulating valve through the control console 1. After the pressure and flow of the main line are stabilized at the set value, the remote control flow regulating valve 6 on the second cooling branch and the third cooling branch is automatically opened step by step, and the remote control flow regulating valve 6 on the bypass branch is adjusted to gradually stabilize the flow of users in the second cooling branch and the third cooling branch and the corresponding branches to the set value. Observe and record whether the flow of users in the second cooling branch and the third cooling branch and the sub-branch of each branch can reach the set value, and the deviation is between 0±5%. After the test, press the stop button by the control console 1, the control console 1 automatically stops the centrifugal pump 2, and then closes the remote control flow regulating valve 6.

[0076] 2) Dynamic flow balance test under multiple working conditions.

[0077] After the first cooling branch, the second cooling branch and the third cooling branch are all stable, shut down users 2, 4, and 6 in the first cooling branch and users 7 in the second cooling branch. Figure 5 .

[0078] Turn on console 1, and set parameters through the flow value setting boxes of the bypass branch, the first cooling branch, the second cooling branch and the third cooling branch, the motor speed setting box of the centrifugal pump and the main line pressure parameter setting box on the human-machine interface.

[0079] During operation, the control console 1 controls the remote control flow regulating valve 6 of the bypass branch to open, closes the remote control flow regulating valve 6 of the first cooling branch, the second cooling branch and the third cooling branch, starts the centrifugal pump 2 made of stainless steel, so that cooling water flows into the centrifugal pump discharge pipeline, and automatically adjusts the electric flow regulating valve through the control console 1 to stabilize the pressure and flow of the main line at the set value, and then automatically and gradually opens the remote control flow regulating valve 6 on the first cooling branch, the second cooling branch and the third cooling branch.

[0080] Close the sub-branches corresponding to users 2, 4, and 6 in the first cooling branch and the sub-branches corresponding to users 7 in the second cooling branch. At this time, the flow rate will change. Adjust the remote control flow regulating valve 6 on the bypass branch, the first cooling branch, the second cooling branch, and the third cooling branch to stabilize the flow rate of users in the first cooling branch, the second cooling branch, the third cooling branch, and the sub-branches of each branch to the set value. Observe and record whether the flow rate of users in the first cooling branch, the second cooling branch, the third cooling branch, and the sub-branches of each branch can reach the set value, with a deviation between 0±5%. After the test, press the stop button on the console 1, and the console 1 automatically stops the centrifugal pump 2, and then close the remote control flow regulating valve 6.

[0081] After the first cooling branch, the second cooling branch and the third cooling branch are all stable, shut down users 1 and 5 in the first cooling branch and users 8 in the second cooling branch. Figure 6 .

[0082] Turn on console 1, and set parameters through the flow value setting boxes of the bypass branch, the first cooling branch, the second cooling branch and the third cooling branch, the motor speed setting box of the centrifugal pump and the main line pressure parameter setting box on the human-machine interface.

[0083] During operation, the control console 1 controls the remote control flow regulating valve 6 of the bypass branch to open, closes the remote control flow regulating valve 6 of the first cooling branch, the second cooling branch and the third cooling branch, starts the centrifugal pump 2 made of stainless steel, so that cooling water flows into the centrifugal pump discharge pipeline, and automatically adjusts the electric flow regulating valve through the control console 1 to stabilize the pressure and flow of the main line at the set value, and then automatically and gradually opens the remote control flow regulating valve 6 on the first cooling branch, the second cooling branch and the third cooling branch.

[0084] Close the sub-branches corresponding to users 1 and 5 in the first cooling branch and the sub-branches corresponding to users 8 in the second cooling branch. At this time, the flow rate will change. Adjust the remote control flow regulating valve 6 on the bypass branch, the first cooling branch, the second cooling branch and the third cooling branch to stabilize the flow rate of users in the first cooling branch, the second cooling branch and the third cooling branch and the sub-branches in each branch to the set value. Observe and record whether the flow rate of users in the first cooling branch, the second cooling branch and the third cooling branch and the sub-branches in each branch can reach the set value, with a deviation between 0±5%. After the test, press the stop button on the console 1, and the console 1 automatically stops the centrifugal pump 2, and then close the remote control flow regulating valve 6.

[0085] After the first cooling branch, the second cooling branch and the third cooling branch are all stable, close the first cooling branch. See the operation flow chart for Figure 7 .

[0086] Turn on console 1, and set parameters through the flow value setting boxes of the bypass branch, the first cooling branch, the second cooling branch and the third cooling branch, the motor speed setting box of the centrifugal pump and the main line pressure parameter setting box on the human-machine interface.

[0087] During operation, the control console 1 controls the remote control flow regulating valve 6 of the bypass branch to open, closes the remote control flow regulating valve 6 of the first cooling branch, the second cooling branch and the third cooling branch, starts the centrifugal pump 2 made of stainless steel, so that cooling water flows into the centrifugal pump discharge pipeline, and automatically adjusts the electric flow regulating valve through the control console 1 to stabilize the pressure and flow of the main line at the set value, and then automatically and gradually opens the remote control flow regulating valve 6 on the first cooling branch, the second cooling branch and the third cooling branch.

[0088] Close the first cooling branch. The flow rate will change. Adjust the remote control flow regulating valve 6 on the bypass branch, the second cooling branch and the third cooling branch to stabilize the flow rate of users in the second cooling branch, the third cooling branch and the neutron branches of each branch to the set value. Observe and record whether the flow rate of users in the second cooling branch, the third cooling branch and the neutron branches of each branch can reach the set value, with a deviation of 0±5%. After the test, press the stop button on the console 1, and the console 1 automatically stops the centrifugal pump 2, and then close the remote control flow regulating valve 6.

[0089] During the whole test process, the cycle and step length of the remote control flow control valve 6, the stabilization time of the measurement system and other data are tested. Based on the above data, the optimal valve control strategy is analyzed and formulated.

[0090] The embodiments of the present invention have the following beneficial effects:

[0091] 1) A scaled-down test device was constructed based on the similarity of hydraulic characteristics to replace the real cooling system for control strategy simulation test.

[0092] 2) The test device can simulate multi-user steady-state flow distribution tests and multi-condition dynamic flow balance tests.

[0093] 3) The static pressure loss or the resistance loss along the pipeline is simulated by using a serpentine tube; the actual local throttling loss of the cooling equipment is simulated by using a throttling orifice plate; these technical measures reduce the scale and cost of the test device and simulate the regional cooling system.

[0094] 4) The test device takes up little space, and the valves and sensors are arranged for easy operation and inspection.

[0095] 5) The test device is easy to build and install, and the debugging cycle is short.

[0096] 6) The test device tests the optimal control strategy of the automatic regulating valve.

[0097] The key technical points of the embodiments of the present invention are as follows:

[0098] 1) The flow balance control scheme is composed of flow control components such as static balancing valve, remote control flow control valve, flow meter, etc.

[0099] 2) Use serpentine pipe to simulate local pressure loss and resistance loss along the pipeline.

[0100] 3) Use throttling orifice plates to simulate the actual local throttling loss of cooling equipment.

[0101] 4) Use the similarity of hydraulic characteristics to construct a scaled-down test device.

Claims

1. A regional cooling system simulation test device, characterized in that: include: One end of the centrifugal pump discharge pipeline, one end of the bypass branch, one end of the first cooling branch, one end of the second cooling branch and one end of the third cooling branch are all connected to the water tank, the other end of the centrifugal pump discharge pipeline is respectively connected to the other end of the bypass branch and one end of the main pipeline, and the other end of the main pipeline is respectively connected to the other end of the first cooling branch, the other end of the second cooling branch and the other end of the third cooling branch; The first cooling branch, the second cooling branch and the third cooling branch are all provided with a static balancing valve, a flow meter and a remote control flow regulating valve; The first cooling branch, the second cooling branch and the third cooling branch are respectively connected to sub-branches having the same number as the cooled equipment, and each sub-branch is provided with a static balancing valve, a pressure sensor and a flow meter; The main pipeline is equipped with a flow meter; The bypass branch is equipped with a flow meter, a remote control flow regulating valve and a pressure sensor; A centrifugal pump is provided in the centrifugal pump discharge pipeline; One end of the centrifugal pump discharge pipeline sucks cooling water from the water tank and flows into the main line and the bypass branch respectively. The cooling water flowing into the bypass branch flows back to the water tank, and the cooling water flowing into the main line flows back to the water tank through the first cooling branch, the second cooling branch, the third cooling branch and the corresponding sub-branches respectively. The console controls the activation of the static balancing valve, the remote control flow regulating valve and the centrifugal pump to control the conduction of the corresponding pipelines. Based on the data collected from the flow meter and pressure sensor, it compares whether the corresponding pipelines have reached the user's preset values, and uses the similarity of hydraulic characteristics to build a scaled-down test to simulate the steady-state flow distribution test of multiple cooling equipment and the dynamic flow balance test of multiple working conditions. The optimal valve control strategy is formulated based on the cycle and step size of the remote control flow regulating valve obtained during the test, and the time taken for the flow meter and pressure sensor to reach the user's preset values.

2. A regional cooling system simulation test device as claimed in claim 1, characterized in that: The main pipeline is also provided with serpentine pipes, and the number of the serpentine pipes is determined by calculating the serpentine pipe resistance data based on the simulated pipeline along-line resistance loss characteristics to simulate the static pressure loss or pipeline along-line resistance loss.

3. A regional cooling system simulation test device as claimed in claim 1, characterized in that: The sub-branch is also provided with a throttling orifice plate, and the opening size of the throttling orifice plate is determined according to the local resistance loss characteristics of the simulated cooled equipment to simulate the actual local throttling loss of the cooling equipment.

4. A regional cooling system simulation test device as claimed in claim 1, characterized in that: The parameters of the centrifugal pump and the pipe diameter size of the centrifugal pump discharge pipe are determined by performing a scaled-down test based on the principle of similarity of hydraulic characteristics.

5. A regional cooling system simulation test device as claimed in claim 1, characterized in that: Each of the sub-branch, the first cooling branch, the second cooling branch, the third cooling branch, the bypass branch and the centrifugal pump discharge pipeline is provided with a stop check valve for one-way flow of cooling water.

6. A regional cooling system simulation test device as claimed in claim 1, characterized in that: The static balancing valve is a flange type static balancing valve, which is pre-adjusted by professional equipment according to the requirements of flow and pressure difference in the first cooling branch, the second cooling branch and the third cooling branch before installation to ensure that the pressure on both sides of the flange type static balancing valve is relatively balanced.

7. A regional cooling system simulation test device as claimed in claim 1, characterized in that: The console includes a computer, a PLC controller and a switching power supply, and is internally provided with three input interfaces of AC380V, AC220V and DC24V to reduce interference between input currents and ensure the accuracy of test data.

8. A regional cooling system simulation test device as claimed in claim 7, characterized in that: The console also includes a human-machine interface for obtaining the user preset value input by the user and displaying the data of the pressure sensor and the flow meter, the motor operation status of the centrifugal pump, the opening and closing status of the static balancing valve and the opening and closing status of the remote control flow regulating valve.

9. A method for simulating a regional cooling system, characterized in that: A regional cooling system simulation test device as claimed in claim 1 is used, comprising the following steps: The steady-state flow distribution test of multiple cooling equipment is as follows: The control console obtains the user preset value, and controls the remote control flow regulating valve of the bypass branch to open, closes the remote control flow regulating valves of the first cooling branch, the second cooling branch and the third cooling branch, starts the centrifugal pump, and adjusts the remote control flow regulating valve of the bypass branch according to the user preset value, so that when the cooling water in the water tank flows into the centrifugal pump discharge pipeline and then flows into the main line, the flow meter of the main line and the pressure sensor data of the bypass branch are at the user preset value, and gradually opens the remote control flow regulating valves on the first cooling branch, the second cooling branch and the third cooling branch and cooperates to adjust the remote control flow regulating valve on the bypass branch, and gradually stabilizes the flow meter data of the first cooling branch, the second cooling branch and the third cooling branch and the cooled equipment of the sub-branches of each branch to the user preset value, and observes and records the cycle and step length of the remote control flow regulating valve, and the time taken for the flow meter and the pressure sensor to reach the user preset value; After the centrifugal pump is stopped and the remote control flow regulating valve is closed at the control console, the user preset value is obtained again. After the flow meter of the main line and the pressure sensor data of the bypass branch reach the user preset value, the remote control flow regulating valves of the first cooling branch and the third cooling branch are gradually opened and the remote control flow regulating valve on the bypass branch is adjusted in coordination. The flow meter data of the cooled equipment of the first cooling branch and the third cooling branch and the neutron branches of each branch are observed to see whether they can be stabilized to the user preset value and the deviation is between 0±5%. The cycle and step length of the remote control flow regulating valve, and the time taken by the flow meter and the pressure sensor to reach the user preset value are observed and recorded. After the centrifugal pump is stopped and the remote control flow regulating valve is closed at the control console, the user preset value is obtained again. After the flow meter of the main line and the pressure sensor data of the bypass branch reach the user preset value, the remote control flow regulating valves of the second cooling branch and the third cooling branch are gradually opened and the remote control flow regulating valve on the bypass branch is adjusted in coordination. The flow meter data of the second cooling branch and the third cooling branch and the cooled equipment of the sub-branches of each branch are observed to see whether they can be stabilized to the user preset value and the deviation is between 0±5%. The cycle and step length of the remote control flow regulating valve, and the time taken by the flow meter and the pressure sensor to reach the user preset value are observed and recorded. The multi-condition dynamic flow balance test is as follows: After the first cooling branch, the second cooling branch and the third cooling branch are all stable, close the sub-branches corresponding to the cooled devices with even numbers in the first cooling branch, and close the sub-branches corresponding to the cooled devices with odd numbers in the second cooling branch. At this time, the flow meter will change. Adjust the remote control flow regulating valves on the bypass branch, the first cooling branch, the second cooling branch and the third cooling branch. Observe whether the flow meter data of the cooled devices in the first cooling branch, the second cooling branch and the third cooling branch and the sub-branches in each branch can stabilize to the user's preset value, and whether the deviation is between 0±5%. Observe and record the cycle and step length of the remote control flow regulating valve, and the time taken for the flow meter and pressure sensor to reach the user's preset value. After the centrifugal pump is stopped and the remote control flow regulating valve is closed at the control console, after the first cooling branch, the second cooling branch and the third cooling branch are all stable, close the sub-branch corresponding to the cooled equipment with an odd number in the first cooling branch, and close the sub-branch corresponding to the cooled equipment with an even number in the second cooling branch. At this time, the flow meter will change, and the remote control flow regulating valve on the bypass branch, the first cooling branch, the second cooling branch and the third cooling branch is adjusted. Observe whether the flow meter data of the cooled equipment in the first cooling branch, the second cooling branch and the third cooling branch and the sub-branches of each branch can be stabilized to the user's preset value, and the deviation is between 0±5%. Observe and record the cycle and step length of the remote control flow regulating valve, and the time taken by the flow meter and pressure sensor to reach the user's preset value; After the centrifugal pump is stopped and the remote control flow regulating valve is closed at the control console, after the first cooling branch, the second cooling branch and the third cooling branch are all stable, the sub-branch corresponding to the cooled equipment in the first cooling branch is closed. At this time, the flow meter will change. Adjust the remote control flow regulating valves on the bypass branch, the second cooling branch and the third cooling branch. Observe whether the flow meter data of the cooled equipment in the second cooling branch and the third cooling branch and the sub-branches of each branch can stabilize to the user's preset value, and whether the deviation is between 0±5%. Observe and record the cycle and step length of the remote control flow regulating valve, and the time taken by the flow meter and pressure sensor to reach the user's preset value; The optimal valve control strategy is formulated based on the data from steady-state flow distribution tests on multiple cooling equipment and dynamic flow balance tests under multiple operating conditions.

10. A regional cooling system simulation test device as claimed in claim 9, characterized in that: The method includes: if the data of the flow meter of the cooled device fails to stabilize to the user preset value and / or exceeds the deviation, adjusting the corresponding remote control flow regulating valve until it stabilizes to the user preset value and satisfies the deviation.

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