A verification device and method for a ship's ventilation system

Abstract

This invention relates to a verification device and method for a ship's ventilation system, comprising: an open water tank at the top; a simulated ship hull, with part of the hull housed within the water tank and another part extending upwards outside the tank; the simulated ship hull including several compartments; an environmental simulation module corresponding to the simulated ship hull; a heat source simulation module corresponding to the simulated ship hull; a ventilation module simulating the actual ship's ventilation system to ventilate and cool the simulated ship hull; and a temperature acquisition module acquiring temperature signals at corresponding locations on the simulated ship hull. This invention, by using a simulated ship hull to perform a comprehensive verification and analysis of the ventilation system of the ship's compartments during actual operation, solves the problem of unverified ventilation systems failing to meet ship ventilation requirements, resulting in excessively high temperatures within the compartments and affecting ship operation.

Description

Technical Field

[0001] This invention relates to the field of experimental apparatus, and more particularly to a verification device and method for a ship hull ventilation system. Background Technology

[0002] Ships navigate various sea areas with complex weather conditions and changeable climates, requiring air conditioning and ventilation systems to provide environmental protection for crew members and ensure the habitability of the ship's environment and the operability of its equipment.

[0003] Because the ship's hull is constructed of steel, it has high thermal conductivity but poor heat storage capacity. According to basic heat transfer theory, the heat exchange mechanism between the various compartments within the ship is as follows: heat dissipation from equipment is transferred to the bulkheads through radiation and natural convection; heat exchange occurs between compartments through conduction, radiation, and natural convection; and the outer walls of the electrical compartment exchange heat with the external environment through natural convection and radiation. Specifically, under the influence of ambient temperature and solar radiation, external disturbances such as air temperature and solar radiation outside the compartments enter the compartments through processes such as heat absorption, conduction, and release by the bulkheads and the absorption, transmission, and release of heat by the windows. Simultaneously, on-site personnel, lighting equipment, and server racks within the compartments also dissipate heat. Air conditioning, ventilation, and air infiltration cause continuous mixing, heat exchange, and flow of air within the compartments. The walls within each compartment continuously exchange heat with the air inside through convection, and due to temperature differences, there is mutual radiative heat transfer between the surfaces. During actual ship operation, when the air conditioning and ventilation system malfunctions, the temperature in the compartments changes rapidly and exceeds the temperature requirements for staff habitation and equipment operation. Simultaneously, the heat transfer process within each compartment is a complex, unsteady-state process. As each compartment is a local space within the ship, its boundary parameters are influenced by global parameters (due to inter-combination effects between compartments). Therefore, accurate acquisition of its internal temperature requires a holistic analysis.

[0004] Currently, research on ship cabin temperature mainly focuses on the engine room and living quarters, and cannot conduct a comprehensive analysis of the ventilation systems of all cabins. When ventilation systems are applied directly without comprehensive verification and analysis, problems often arise where the ventilation systems do not meet the ship's ventilation requirements, resulting in excessively high cabin temperatures and affecting the ship's operation. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a verification device and verification method for a ship ventilation system.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a ship ventilation system verification device, comprising: an open water tank at the top;

[0007] The simulated hull has a portion of its hull housed within the water tank, while another portion extends upwards outside the water tank; the simulated hull includes several compartments.

[0008] An environment simulation module is provided corresponding to the simulated hull and is used to simulate the external working environment of the hull during actual operation.

[0009] A heat source simulation module is set up corresponding to the simulated hull and is used to simulate the operating environment of the equipment in each compartment of the hull during actual operation.

[0010] A ventilation module, simulating the ventilation system of the ship's hull, is used to ventilate and cool the simulated ship's hull.

[0011] The temperature acquisition module is used to acquire temperature signals of the simulated hull at corresponding locations in the external working environment and the equipment operating environment.

[0012] Preferably, it further includes:

[0013] A control module, connected to the environmental simulation module and the heat source simulation module, is used to control the corresponding modules during the verification process;

[0014] The status display module is used to display the status of the external working environment, the status of the equipment operating environment, and the temperature signal.

[0015] Preferably, the external working environment includes the underwater temperature, bulkhead temperature, sunlight exposure, and underwater current velocity of the hull during actual operation.

[0016] The environment simulation module includes:

[0017] A solar radiation simulation unit is used to simulate the solar radiation on the ship during actual operation.

[0018] An underwater flow velocity and temperature simulation unit is used to simulate the underwater temperature and underwater flow velocity of the hull during actual operation; and

[0019] The bulkhead temperature simulation unit is used to simulate the bulkhead temperature of the ship during actual operation.

[0020] Preferably, the solar radiation simulation unit includes:

[0021] A frame corresponding to the simulated hull, infrared lights mounted on the frame, and a first temperature sensor and intensity meter mounted on the top of the simulated hull;

[0022] The infrared lamps are connected to the control module and are used to illuminate the simulated ship hull.

[0023] The first temperature sensor is connected to the control module and is used to monitor the temperature of the infrared lamps illuminating the simulated ship hull.

[0024] The intensity meter is connected to the control module and is used to monitor the light intensity of the infrared lamps illuminating the simulated ship hull.

[0025] Preferably, the solar radiation simulation unit further includes:

[0026] An alarm connected to the control module will sound an alarm when the temperature of the infrared lamp exceeds the limit.

[0027] An emergency stop switch connected to the control module cuts off the power switch of the infrared lamp when the solar radiation unit simulates a fault.

[0028] Preferably, the bulkhead temperature simulation unit includes: an electrothermal film laid on the bulkhead of the simulated hull, and a second temperature sensor for measuring the bulkhead temperature of the simulated hull;

[0029] The electric heating film is connected to the control module and is used to heat the bulkhead of the simulated hull to simulate the bulkhead temperature of the hull during actual operation, wherein the bulkhead temperature is the boundary temperature at the interface between the bulkhead and the air of the hull.

[0030] The second temperature sensor is attached to the outside of the bulkhead of the simulated ship hull.

[0031] Preferably, the underwater flow velocity and temperature simulation unit includes at least one electric heater, a solid-state relay connected to the control module, a third temperature sensor disposed in the water tank, and a water pump installed in the water tank;

[0032] The electric heater is connected to the solid-state relay. The electric heater is disposed in the gap between the bulkhead of the simulated ship hull and the side wall of the water tank. The electric heater is used to heat the water in the water tank.

[0033] The solid-state relay is used to control the start or stop of the electric heater;

[0034] The third temperature sensor is connected to the control module and is used to monitor the underwater temperature in the water tank;

[0035] The water pump is connected to the control module and is used to adjust the underwater flow rate in the water tank.

[0036] Preferably, the heat source simulation module includes a simulated heat source, an electronic voltage regulator, and a power meter disposed in each of the compartments; the simulated heat source is used to simulate the actual heat generation of the equipment in each compartment of the cabin during actual operation; the electronic voltage regulator is connected to the simulated heat source and is used to adjust the input voltage of the simulated heat source; the power meter is connected to the simulated heat source and is used to record the power of the simulated heat source.

[0037] Preferably, the temperature acquisition module includes a temperature data acquisition unit placed outside the simulated hull and a fourth temperature sensor connected to the temperature data acquisition unit; the fourth temperature sensor is installed inside the simulated hull and is used to monitor the temperature signals in each compartment of the simulated hull, wherein multiple fourth temperature sensors are provided; the temperature data acquisition unit is connected to the status display module and is used to acquire the temperature signals in each compartment of the simulated hull and transmit them to the status display module for display.

[0038] Preferably, the ventilation module includes an air-source heat pump, a fresh air fan, a plenum chamber, a supply air fan, and a return air fan; the air inlet of the fresh air fan is connected to the air outlet of the air-source heat pump, and the air outlet of the fresh air fan is connected to the air inlet of the plenum chamber; the air inlet of the supply air fan is connected to the air outlet of the plenum chamber, and the air outlet of the supply air fan is connected to the simulated ship hull; the air inlet of the return air fan is connected to the simulated ship hull, and the air outlet of the return air fan is connected to the air inlet of the plenum chamber.

[0039] The present invention also provides a method for verifying a ship ventilation system, using any of the ship ventilation system verification devices described in the present invention, comprising the following steps:

[0040] S1: After completing the test preparation, the water tank is pre-filled with water at a preset water level, and water is added to the water tank according to the preset water level;

[0041] S2: Obtain the verification conditions of the ventilation system, and based on the verification conditions, obtain the external working environment, equipment operating environment, and operating air volume of the simulated hull under the verification conditions. Open the environment simulation module and run it to the external working environment corresponding to the verification conditions. Open the heat source simulation module and run it to the equipment operating environment corresponding to the verification conditions. Based on the verification conditions, control the simulated hull to reach the operating air volume corresponding to the verification conditions.

[0042] S3: Based on the preheating time corresponding to the verification condition, preheat the simulated hull until the external working environment, the equipment operating environment, and the operating air volume corresponding to the verification condition are in a stable state.

[0043] S4: After preheating is completed, based on the verification condition, adjust the heating power of the heat source simulation unit to within the power error range. At the same time, turn on the temperature acquisition module to obtain the temperature signals of each of the compartments of the simulated hull, and determine whether the temperature signals meet the requirements. If yes, the verification condition meets the requirements; otherwise, the verification condition does not meet the requirements.

[0044] Preferably, the preheating time is 20 min to 30 min.

[0045] Preferably, the verification conditions include the normal operation of the ventilation system, the ventilation system only ventilating without cooling, and the natural ventilation condition when the ventilation system is not working.

[0046] Implementing this invention has the following beneficial effects: This ship ventilation system verification device simulates the scenario of a ship having multiple compartments in actual operation by setting up a simulated ship hull with several compartments. At the same time, it simulates the external working environment, equipment operating environment and ventilation module during the actual operation of the ship, and performs overall verification and analysis of the ship's ventilation system. This solves the problem that the ventilation system was directly applied without verification and did not meet the ship's ventilation requirements, resulting in excessively high temperatures in the compartments, which affected the operation of the ship. Attached Figure Description

[0047] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0048] Figure 1 This is a front view of the ship hull ventilation system verification device of the present invention;

[0049] Figure 2 This is a rear view of the verification device for the ship hull ventilation system of the present invention;

[0050] Figure 3 This is a top view of the ship hull ventilation system verification device of the present invention;

[0051] Figure 4 This is a schematic diagram of the installation of the water tank, simulated ship hull, and frame of the present invention;

[0052] Figure 5 This is a left view showing the installation of the water tank, simulated ship hull, and electric heater of the present invention;

[0053] Figure 6 This is a front view of the water tank, simulated ship hull, and electric heater of the present invention.

[0054] Figure 7 This is a top view of the installation of the water tank, simulated ship hull, and electric heater of the present invention;

[0055] Figure 8 This is a system connection diagram of the water environment control unit of the present invention;

[0056] Figure 9 This is a system connection diagram of the ventilation module and the simulated ship hull of the present invention;

[0057] Figure 10 This is a schematic diagram of the verification method for the ship hull ventilation system of the present invention. Detailed Implementation

[0058] To provide a clearer understanding of the technical features, objectives, and effects of this invention, specific embodiments are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or element referred to must have a specific orientation; therefore, they should not be construed as limitations on this invention.

[0059] like Figures 1-3The diagram shows a system schematic of a ship ventilation system verification device provided by the present invention. This device can be used to verify whether the ship ventilation system meets the usage requirements. Here, the ventilation system refers to three different verification conditions during actual ship operation: normal operation of the ventilation system, ventilation system only ventilating without cooling, and natural ventilation when the ventilation system is not working. The device may include a water tank 3, a simulated ship 2, an environmental simulation module, a heat source simulation module, a ventilation module, a temperature acquisition module, a control module, and a status display module. The simulated ship 2 is a scaled-down model of the ship during actual operation, with a scale range of (1:5-1:50). It can simulate the various compartments of the ship during actual operation, thus verifying the ventilation system of each compartment. In one embodiment, the simulated ship 2 may include several compartments to simulate the situation where multiple compartments are provided on the ship during actual operation. The simulated hull 2 ​​uses the same steel structure as the actual hull to simulate the thermal conductivity and heat storage capacity of a steel hull. The simulated hull 2 ​​is installed inside a water tank 3, with part of the hull inside the tank 3 and another part extending upwards outside, simulating the actual operation where part of the hull is submerged and the other part extends above the water surface. An environmental simulation module is correspondingly set up with the simulated hull 2 ​​to simulate the external working environment of the hull during actual operation. This external working environment may include underwater temperature, bulkhead temperature, sunlight exposure, and underwater current velocity. A heat source simulation module is also correspondingly set up with the simulated hull 2 ​​to simulate the operating environment of equipment in each compartment of the hull during actual operation. This equipment operating environment refers to the heat generated by the equipment in the compartments during actual operation. The ventilation module is connected to the simulated hull 2, simulating the ventilation system of an actual ship. It is used to ventilate and cool the simulated hull 2. The design of this ventilation module is the same as that of the actual ship's ventilation system, and the ventilation effect verified by this module can characterize the ventilation effect of the actual ship's ventilation system. The temperature acquisition module is used to collect temperature signals at corresponding locations on the simulated hull 2 ​​under the simulated external working environment and equipment operating environment. The control module is connected to the environmental simulation module and the heat source simulation module, and is used to control the corresponding modules. The status display module displays the status of the external working environment, the status of the equipment operating environment, and the temperature signal.

[0060] like Figure 1As shown, the water tank 3 can be a cube with an open top. It is understood that the dimensions of the water tank 3 are related to the size of the simulated hull 2; that is, the simulated hull 2 ​​can be placed inside the water tank 3, and part of the simulated hull 2 ​​can extend upwards outside the water tank 3. Furthermore, there is redundant space between the bulkheads of the simulated hull 2 ​​and the side walls of the water tank 3, so that water can flow within the water tank 3 after it is filled, simulating the underwater flow velocity during actual ship operation. In one embodiment, the dimensions of the water tank 3 are 330cm × 190cm × 95cm (length × width × height).

[0061] In this embodiment, the environmental simulation module may include a solar radiation simulation unit, a bulkhead temperature simulation unit, and an underwater flow velocity and temperature simulation unit. The solar radiation simulation unit simulates the sunlight illuminating the ship's hull during actual operation. The bulkhead temperature simulation unit simulates the bulkhead temperature during actual operation to recreate the boundary temperature conditions between the air and the hull bulkheads. The underwater flow velocity and temperature simulation unit simulates the underwater temperature and flow velocity of the ship's hull during actual operation.

[0062] Specifically, the solar radiation simulation unit may include a frame 1, a first control cabinet 4, infrared lamps, an alarm, an emergency stop switch, an intensity meter, and a first temperature sensor. The frame 1 is installed correspondingly to the simulated hull 2. The infrared lamps are installed on the frame 1 and located above the simulated hull 2; these lamps are connected to the control module and are used to illuminate the simulated hull 2 ​​to simulate the sunlight received by the hull during actual operation. The infrared lamps simulate sunlight with a radiation wavelength range including short-wave and mid-wave infrared light. The alarm and emergency stop switch are both installed on the first control cabinet and connected to the control module. The first control cabinet 4 is placed outside the simulated hull 2, and the control module is installed inside the first control cabinet 4. The first temperature sensor is installed on the top of the simulated hull 2 ​​to monitor the illumination temperature of the infrared lamps, and the first temperature sensor is connected to the control module, feeding back the acquired illumination temperature of the infrared lamps to the control module. An intensity meter is installed on the top of the simulated hull 2 ​​to obtain the light intensity of the infrared lamps on the simulated hull 2. The intensity meter is connected to the control module and feeds back the obtained light intensity of the infrared lamps to the control module, so that the on-site experimental personnel can adjust the light intensity of the infrared lamps according to the obtained light intensity.

[0063] like Figures 3-4As shown, in some embodiments, the frame 1 may be made of steel. The frame 1 may include four retractable uprights, four first support columns, and several second support columns; the four retractable uprights are distributed at the four corners of the simulated hull 2. Each pair of retractable uprights is connected by a first support column, which is vertically connected to the retractable end of the retractable upright. The two ends of the second support columns are vertically connected between two symmetrical first support columns, and all second support columns are arranged in parallel. Lamp holders are provided on the second support columns, and the lamp holders are horizontally adjustable along the second support columns. Simultaneously, the retractable uprights extend and retract to adjust the distance between the infrared lamps and the simulated hull 2. Therefore, the infrared lamps can be arranged in different combinations to form simulated light intensity over a specified irradiation area, simulating different light intensities in different regions.

[0064] The first temperature sensor can be either a contact temperature sensor or a non-contact temperature sensor. In one embodiment, a non-contact temperature sensor is selected. Multiple first temperature sensors can be provided, for example, three. The first temperature sensors are fixed to the top of the simulated hull 2, with one sensor installed at each end of the top and one in the middle. The other end of the first temperature sensor is connected to the control module via a cable to achieve real-time measurement of the temperature of the infrared lamp illumination.

[0065] The bulkhead temperature simulation unit may include a second temperature sensor and an electrothermal film. The electrothermal film is laid on the bulkheads of the simulated hull 2 ​​to heat the bulkheads of the simulated hull 2, simulating the boundary temperature conditions at the interface between the compartment and the air during actual operation. Before verifying the ventilation system, the electrothermal film is turned on to control the temperature of the simulated hull 2 ​​within the required temperature range, where the required temperature range refers to the required boundary temperature range at the interface between the bulkhead and the air of the simulated hull 2 ​​under the operating conditions to be verified by the ventilation system. In one embodiment, each bulkhead of the simulated hull 2 ​​is covered with an electrothermal film, and the other end of the electrothermal film is connected to the control module via a cable. The second temperature sensor is attached to the bulkhead of the simulated hull 2. The other end of the second temperature sensor is connected to the control module via a cable. During the heating process of the electric heating film on the bulkhead of the simulated hull 2, the second temperature sensor measures the temperature of the bulkhead of the simulated hull 2 ​​in real time and feeds back the measured value of the bulkhead to the control module. When the measured temperature of the bulkhead of the simulated hull 2 ​​reaches the required temperature range, the control module controls the electric heating film to stop heating. Conversely, when the measured temperature of the compartment is lower than the required temperature range, the control module controls the electric heating film to reheat.

[0066] The second temperature sensor can be a contact temperature sensor. In one embodiment, multiple second temperature sensors can be provided, for example, four; one second temperature sensor is attached to each side wall of the simulated hull 2. Of course, three, six or more second temperature sensors can also be provided.

[0067] like Figure 8 As shown, in some embodiments, the underwater flow velocity and temperature simulation unit may include a solid-state relay, an electric heater 31, a third temperature sensor, a water pump, and a second control cabinet 5. The electric heater 31 is installed inside the water tank 3, located in the gap between the side wall of the water tank 3 and the bulkhead of the simulated hull 2; it heats the water in the water tank 3 as needed after water is added. One end of the solid-state relay is connected to the electric heater 31, and the other end is connected to the control module to control the start or stop of the electric heater 31. The third temperature sensor is installed inside the water tank 3 to measure the underwater temperature in the water tank 3 in real time and transmit the measured underwater temperature to the control module. The water pump is installed inside the water tank 3 and connected to the control module to drive the water flow in the water tank 3 to maintain a uniform underwater temperature and control the underwater flow velocity in the water tank 3. In one embodiment, the solid-state relay is installed inside the second control cabinet 5.

[0068] In this embodiment, the control module is configured with a target temperature difference and a target water temperature. The control module compares the underwater temperature transmitted by the third temperature sensor with the target water temperature to obtain the difference between the two, thereby determining whether the electric heater 31 needs to be activated. When the difference between the underwater temperature and the target water temperature is less than the target temperature difference, the control module controls the solid-state relay to open, thereby stopping the electric heater 31 from heating. Simultaneously, the control module controls the water pump to stop working. When the difference between the underwater temperature and the target water temperature is greater than the target temperature difference, the control module controls the solid-state relay to close, thereby starting the electric heater 31 from heating. Simultaneously, the control module controls the water pump to start working.

[0069] The third temperature sensor can be a contact temperature sensor or a non-contact temperature sensor. In one embodiment, the third temperature sensor is a contact temperature sensor. In one embodiment, multiple third temperature sensors can be set, for example, three. The third temperature sensors can be set at different locations within the water tank 3 to monitor whether the underwater temperature is uniform. Correspondingly, a first temperature difference value can be set on the control module. When the difference between the maximum and minimum underwater temperatures measured by the multiple third temperature sensors is greater than the first temperature difference value, the water pump starts; when the difference between the maximum and minimum underwater temperatures measured by the multiple third temperature sensors is less than the first temperature difference value, the water pump stops.

[0070] like Figures 5-7As shown, in some embodiments, multiple electric heaters 31 may be provided, for example, four. One electric heater 31 is installed between each bulkhead of the simulated hull 2 ​​and the side wall of the water tank 3. Each pair of electric heaters 31 forms a group, and the electric heaters 31 in the same group are connected in parallel to the control module via cables. It should be noted that both the electric heaters 31 and the cables are waterproofed.

[0071] The heat source simulation module may include a simulated heat source, an electronic voltage regulator, and a power meter. The simulated heat sources are installed in each compartment of the simulated hull 2 ​​to simulate the heat generation of equipment in each compartment during the operation of an actual ship. The electronic voltage regulator is connected to the simulated heat source and is used to control the voltage input of the simulated heat source. The power meter is connected to the simulated heat source and is used to record the power of the simulated heat source. Additionally, the electronic voltage regulator is also connected to the control module, which controls its output. The power meter is also connected to the control module, and the power of the simulated heat source recorded by the power meter is transmitted to the control module.

[0072] Specifically, based on the principle of similarity, the total heat of the actual equipment in each compartment of the actual ship is calculated. According to the heating method and resistance value of the simulated heat source, the total heat is converted into the input voltage required by the simulated heat source. The corresponding voltage is then input through an electronic voltage regulator to ensure that the simulated heat source generates heat at approximately the required amount. In this embodiment, multiple simulated heat sources can be set up and grouped. Specifically, simulated heat sources with the same heating method, similar heat output, and similar input voltage can be grouped together. Each group of simulated heat sources is equipped with an electronic voltage regulator and a power meter to adjust the simulated heat source over time. In one embodiment, both the electronic voltage regulator and the power meter are integrated into the second control cabinet 5.

[0073] The temperature acquisition module may include several temperature data acquisition units and a fourth temperature sensor. Multiple fourth temperature sensors may be installed on the bulkheads of each compartment of the simulated hull 2 ​​and at different locations within the simulated hull 2, for real-time measurement of the temperature at different locations within the simulated hull 2. The other ends of multiple fourth temperature sensors are connected in parallel to the temperature data acquisition units via cables, and the real-time measurements acquired by the fourth temperature sensors are transmitted to the temperature data acquisition units. The temperature data acquisition units are placed outside the simulated hull 2, adjacent to the status display module. The temperature data acquisition units are connected to the status display module, displaying the acquired real-time temperature measurements of the simulated hull 2 ​​on the status display module.

[0074] The control module can be a programmable logic controller (PLC), but is not limited to a PLC; other control methods, such as a DCS control system, can also be used. This control module is installed inside the first control cabinet 4. In one embodiment, a first alarm threshold and a second alarm threshold can be set on the control module. When the illumination temperature fed back by the first temperature sensor exceeds the first alarm threshold, the control module triggers an alarm, and on-site personnel check the alarm signal. When the illumination temperature exceeds the second alarm threshold, the control module triggers both the alarm and an emergency stop switch, which cuts off the power switch of the infrared lamp, stopping the illumination.

[0075] The status display module is placed together with the first control cabinet and is connected to the programmable controller and the temperature data acquisition unit. In practical applications, the temperature signal collected by the temperature data acquisition unit from the fourth temperature sensor is transmitted to the status display module for display; similarly, the corresponding data collected by the programmable controller is also transmitted to the status display module for display. In one embodiment, the status display module can be an industrial computer, but is not limited to one, such as a laptop computer or other mobile terminal display device.

[0076] like Figure 9 As shown, in some embodiments, the ventilation module may include an air-source heat pump, a fresh air fan, a plenum chamber, a supply air fan, and a return air fan. The outlet of the air-source heat pump is connected to the inlet of the fresh air fan, which processes the fresh air, which then flows to the inlet of the fresh air fan. The outlet of the fresh air fan is connected to the inlet of the plenum chamber, allowing fresh air to flow through it. The outlet of the plenum chamber is connected to the inlet of the supply air fan, allowing fresh air to enter the supply air fan after passing through it. The outlet of the supply air fan is connected to the simulated hull 2, allowing fresh air to enter the simulated hull 2 ​​after passing through it. The inlet of the return air fan is connected to the simulated hull 2, and the fresh air inside the simulated hull 2 ​​circulates under the action of the return air fan. The outlet of the return air fan is connected to the inlet of the static pressure box, simulating the circulation of fresh air inside the ship hull 2 ​​under the action of the return air fan.

[0077] The static pressure box may include a series A static pressure box 6 and a series B static pressure box 7; in one embodiment, the series A static pressure box 6 and the series B static pressure box 7 are arranged side by side. The input terminals of both the series A static pressure box 6 and the series B static pressure box 7 are connected to the fresh air fan, and the input terminals of both the series A static pressure box 6 and the series B static pressure box 7 are also connected to the return air fan; the output terminals of both the series A static pressure box 6 and the series B static pressure box 7 are connected to the supply air fan.

[0078] In this embodiment, the hull ventilation system verification device can verify three different verification conditions of the ventilation system. It should be noted that the hull ventilation system verification device can collect temperature signals at different locations in several compartments within the simulated hull 2.

[0079] like Figure 10 As shown, the present invention also provides a method for verifying a ship's ventilation system, comprising the following steps:

[0080] S1: After completing the test preparation, preset the water level in water tank 3, and fill water into water tank 3 according to the preset water level. Specifically, preset the water level in water tank 3, and use an external water supply device to fill water into water tank 3 to the preset water level.

[0081] S2: Obtain the verification operating conditions of the ventilation system. Based on the verification operating conditions, obtain the external working environment, equipment operating environment, and operating air volume corresponding to the simulated hull 2 ​​under the verification operating conditions. Open the environment simulation module and run it to the external working environment corresponding to the verification operating conditions. Open the heat source simulation module and run it to the equipment operating environment corresponding to the verification operating conditions. According to the verification operating conditions, control the simulated hull 2 ​​to achieve the operating air volume corresponding to the verification operating conditions. Specifically, the verification operating conditions of the ventilation system include three different modes: normal operation of the ventilation system, ventilation system only ventilating without cooling, and natural ventilation when the ventilation system is not working. The requirements for the corresponding external working environment and operating air volume are different under different operating conditions. At the same time, based on the verification operating conditions, obtain the equipment operating environment corresponding to the verification operating conditions. Further, open the environment simulation module to run the simulated hull 2 ​​to the external working environment corresponding to the verification operating conditions. According to the verification operating conditions, adopt the corresponding ventilation mode to make the simulated hull 2 ​​achieve the operating air volume corresponding to the verification operating conditions. It should be noted that there are no requirements on the order in which the solar radiation simulation unit, underwater flow velocity and temperature simulation unit, and bulkhead temperature simulation unit are opened when the environmental simulation module is opened.

[0082] S3: Based on the preheating time corresponding to the verification condition, preheat the simulated hull 2 ​​until the external working environment, equipment operating environment, and operating airflow corresponding to the verification condition are in a stable state. Specifically, the required preheating time for the simulated hull 2 ​​varies under different verification conditions, until the cabin operating environment, equipment operating environment, and operating airflow are in a stable state. In this embodiment, the preheating time is 20 minutes. ～ 30 minutes; it should be noted that the preheating time is 20 minutes. ～ 30 minutes is a reference selection and is not limited to the above preheating time range. When necessary, it can be selected according to the actual verification situation on site.

[0083] S4: After preheating, based on the verification conditions, adjust the heating power of the heat source simulation unit to within the power error range. Simultaneously, turn on the temperature acquisition module to obtain temperature signals from each compartment of the simulated hull 2. Determine if the temperature signals meet the requirements. If yes, the verification conditions are compliant; otherwise, they are not. Specifically, after the external working environment, equipment operating environment, and operating airflow are stable, turn on the temperature acquisition module to collect temperature signals. The temperature acquisition module can collect temperature signals from different locations on the simulated hull 2. The module records a temperature signal every 10 seconds. When the collected temperature signals tend to stabilize, the verification can be terminated. Analyze the collected temperature signals to determine if the verified conditions meet the requirements. If the temperature signals meet the requirements, the verified conditions are compliant; if the temperature signals do not meet the requirements, the verified conditions are not compliant.

[0084] The specific process for validating the ventilation system is as follows:

[0085] Before starting, the switches need to be checked, specifically the main switch and branch switches of the first control cabinet 4 and the main switch and branch switches of the second control cabinet 5, to ensure they are functioning properly. After the check, the verification site is cleaned to ensure the ship's ventilation system verification device is operating normally. On-site personnel must wear insulated gloves and sun hats before entering the site. Upon arrival, the parameter details are checked against the basic control parameter table for the verification conditions. After verification, verification preparation begins. Specifically, water is filled into water tank 3, with a target water level set. Water filling is stopped when the target water level is reached. After water filling, the underwater flow velocity and temperature simulation unit, solar radiation simulation unit, bulkhead temperature simulation unit, and heat source simulation module are gradually activated. After preheating for 5 minutes, electrical faults are checked. Simultaneously, the ventilation module is activated to circulate fresh air on one side of the simulated hull 2, and the fresh air fan is turned on according to the pre-adjusted airflow. If electrical or other faults are found, the test is immediately stopped and an inspection is conducted. The next verification operation is performed after the fault is resolved. Once the ship's ventilation system verification device is operating normally, verification is carried out according to the verification conditions. Specifically, when the verification condition is the normal operating condition of the ventilation system, the external working environment, equipment operating environment, and operating air volume are set according to the verification condition settings. The environment simulation module, heat source simulation module, and ventilation mode for the required verification condition are activated one by one. When the air volume in the simulated cabin of hull 2 ​​reaches the operating air volume, the initial debugging is complete. After the initial debugging is completed, preheating is performed for 20 minutes under the above conditions. ～A 30-minute preheating period is allowed to ensure that the external working environment, equipment operating environment, and operating air volume of the simulated hull 2 ​​are stable. The specific preheating time will depend on the on-site debugging results. After preheating, the simulated heat source is adjusted according to the operating status of the equipment in each compartment of the hull during actual operation. The heating power value of the simulated heat source is adjusted according to time periods. Adjusting the heating power value of the simulated heat source according to time periods refers to referencing the heating power of the equipment in the compartment during actual operation over a certain period of time. This period can be 1 hour or other times, depending on the actual situation. After the heating power of the simulated heat source stabilizes at the specified value, the temperature acquisition module is turned on to acquire the temperature signals of each compartment in the simulated hull 2. The temperature acquisition module acquires the temperature signal every 10 seconds. When the acquired temperature signal tends to stabilize, the current verification can be ended. The acquired temperature signal is then analyzed to determine whether the normal operating conditions of the ventilation system meet the requirements. That is, if the acquired temperature signal meets the requirements, the normal operating conditions of the ventilation system meet the requirements; if the acquired temperature signal does not meet the requirements, the normal operating conditions of the ventilation system do not meet the requirements. When verifying the ventilation system under the condition of ventilation without cooling, the process is the same as that for the normal operation condition, except that the cooling function of the ventilation module is turned off. The specific verification process will not be detailed here. Similarly, when verifying the ventilation system under the condition of natural ventilation without operation, the process is the same as that for the normal operation condition, except that the ventilation module is turned off. The specific verification process will not be detailed here. It should be noted that when verifying one condition and then needing to verify another, the ship's ventilation system verification device must be shut down, relevant instruments must be organized, the experimental site must be cleaned, and the verification data must be post-processed. Verification should begin after the simulated hull 2 ​​has cooled to the required initial value. It should be noted that the required initial value can be obtained from the commissioning data corresponding to the on-site verification condition.

[0086] It is understood that the above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can freely combine the above technical features without departing from the concept of the present invention, and can also make several modifications and improvements, all of which fall within the protection scope of the present invention. Therefore, all equivalent transformations and modifications made with respect to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A method of verifying a hull venting system, characterized by, The method is applied to a ship body ventilation system verification device, the device comprising: an upper open water tank (3); a simulated ship body (2), a part of the ship body of the simulated ship body (2) being arranged in the water tank (3), and another part of the ship body extending upwards out of the water tank (3); the simulated ship body (2) comprising a plurality of cabins; an environment simulation module, corresponding to the simulated ship body (2), for simulating an external working environment of the ship body in actual operation of the ship body; a heat source simulation module, corresponding to the simulated ship body (2), for simulating an equipment operating environment in each cabin of the ship body in actual operation of the ship body; a ventilation module, simulating a ventilation system of the ship body in actual operation, for ventilating and cooling the simulated ship body (2); a temperature acquisition module, for acquiring temperature signals of corresponding positions of the simulated ship body (2) under the external working environment and the equipment operating environment. The method comprises the following steps: S1: after completing test preparation, a preset water level is set in the water tank (3), and water is injected into the water tank (3) according to the preset water level; S2: a verification working condition of the ventilation system is obtained, the corresponding external working environment, equipment operating environment, and operating air volume of the simulated ship body (2) under the verification working condition are obtained according to the verification working condition, the environment simulation module is turned on to run under the external working environment corresponding to the verification working condition, the heat source simulation module is turned on to run under the equipment operating environment corresponding to the verification working condition, and the simulated ship body (2) is controlled to reach the operating air volume corresponding to the verification working condition according to the verification working condition; S3: the simulated ship body (2) is preheated based on a preheating time corresponding to the verification working condition, and is preheated to a stable state of the external working environment, the equipment operating environment, and the operating air volume corresponding to the verification working condition; S4: after preheating is completed, the heating power of the heat source simulation module is adjusted to be within a power error range based on the verification working condition, meanwhile, the temperature acquisition module is turned on, the temperature signals of each cabin of the simulated ship body (2) are acquired, and it is determined whether the temperature signals meet the requirements; if yes, the verification working condition meets the requirements; if no, the verification working condition does not meet the requirements.

2. The ship hull vent system verification method of claim 1, wherein, Further comprising: a control module, connected with the environment simulation module and the heat source simulation module, for controlling corresponding modules during verification; a state display module, for displaying the state of the external working environment, the state of the equipment operating environment, and the temperature signals.

3. The ship hull vent system verification method of claim 2, wherein, The external working environment comprises an underwater temperature, a cabin wall temperature, sunlight, and an underwater flow rate of the ship body in actual operation of the ship body; The environment simulation module comprises: a sunlight radiation simulation unit, for simulating sunlight of the ship body in actual operation of the ship body on the ship body; an underwater flow rate and temperature simulation unit, for simulating the underwater temperature and the underwater flow rate of the ship body in actual operation of the ship body; and a cabin wall temperature simulation unit, for simulating the cabin wall temperature of the ship body in actual operation of the ship body.

4. The ship hull vent system verification method of claim 3, wherein, The solar radiation simulation unit comprises: a frame (1) corresponding to the simulation ship body (2), infrared lamps installed on the frame (1), and a first temperature sensor and an intensity meter installed on the top of the simulation ship body (2); the infrared lamps are connected with the control module and used for irradiating the simulation ship body (2); the first temperature sensor is connected with the control module and used for monitoring the temperature of the simulation ship body (2) irradiated by the infrared lamps; the intensity meter is connected with the control module and used for monitoring the light intensity of the simulation ship body (2) irradiated by the infrared lamps.

5. The ship hull vent system verification method of claim 4, wherein, The solar radiation simulation unit further comprises: an alarm connected with the control module, which alarms when the temperature of the infrared lamps exceeds the temperature; an emergency stop switch connected with the control module, which cuts off the power switch of the infrared lamps when the solar radiation simulation unit fails.

6. A ship hull venting system verification method according to any one of claims 3-5, characterized in that, The bulkhead temperature simulation unit comprises: an electric heating film laid on the bulkhead of the simulation ship body (2), and a second temperature sensor used for measuring the bulkhead temperature of the simulation ship body (2); the electric heating film is connected with the control module and used for heating the bulkhead of the simulation ship body (2) to simulate the bulkhead temperature of the ship body in actual operation, wherein the bulkhead temperature is the boundary temperature at the interface between the bulkhead of the ship body and the air; the second temperature sensor is attached to the outside of the bulkhead of the simulation ship body (2).

7. A ship hull vent system verification method according to any of claims 3-5, characterized in that, The underwater flow rate and temperature simulation unit comprises at least one electric heater (31), a solid-state relay connected with the control module, a third temperature sensor arranged in the water tank (3), and a water pump installed in the water tank (3); the electric heater (31) is connected with the solid-state relay, the electric heater (31) is arranged in the gap between the bulkhead of the simulation ship body (2) and the side wall of the water tank (3), and the electric heater (31) is used for heating the water in the water tank (3); the solid-state relay is used for controlling the start or stop of the electric heater (31); the third temperature sensor is connected with the control module and used for monitoring the underwater temperature in the water tank (3); the water pump is connected with the control module and used for adjusting the underwater flow rate in the water tank (3).

8. The ship hull vent system verification method of claim 7, wherein, The heat source simulation module comprises a simulation heat source arranged in each cabin, an electronic voltage regulator, and a power meter; the simulation heat source is used for simulating the actual equipment operation heating condition in each cabin of the ship body in actual operation; the electronic voltage regulator is connected with the simulation heat source and used for adjusting the input voltage of the simulation heat source; the power meter is connected with the simulation heat source and used for recording the power of the simulation heat source.

9. The ship hull vent system verification method of claim 8, wherein, The temperature collection module comprises a temperature data collector placed outside the simulation ship body (2) and a fourth temperature sensor connected with the temperature data collector; The fourth temperature sensor is installed in the simulation ship body (2) and used for monitoring the temperature signal in each cabin of the simulation ship body (2), wherein the fourth temperature sensor is provided with a plurality of temperature sensors; The temperature data collector is connected with the state display module and used for collecting the temperature signal of each cabin of the simulation ship body (2) and transmitting to the state display module for display.

10. The ship hull vent system verification method of claim 9, wherein, The ventilation module comprises an air energy heat blower, a fresh air blower, a static pressure tank, a supply air blower and a return air blower. The air inlet end of the fresh air blower is communicated with the air outlet end of the air energy heat blower, and the air outlet end of the fresh air blower is communicated with the air inlet end of the static pressure tank. The air inlet end of the supply air blower is communicated with the air outlet end of the static pressure tank, and the air outlet end of the supply air blower is communicated with the simulation ship body (2). The air inlet end of the return air blower is communicated with the simulation ship body (2), and the air outlet end of the return air blower is communicated with the air inlet end of the static pressure tank.

11. The ship hull vent system verification method of claim 1, wherein, The preheating time is 20 min to 30 min.

12. The ship hull vent system verification method of claim 1, wherein, The verification working conditions comprise a normal working condition of the ventilation system, a working condition of the ventilation system only for ventilation without refrigeration and a natural ventilation working condition when the ventilation system does not work.

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