A detection system and method for testing the cooling function of a subsea data center

Abstract

This invention relates to the field of water cooling technology and discloses a testing system and method for testing the cooling function of an underwater data center. The system includes: a water supply tank for accommodating a seawater pump and receiving drainage; an ice water supply module including an ice water tank and an ice water pump for supplying ice water to the water supply tank; a first water level detector and a first water temperature detector for detecting the water level and water temperature of the water supply tank, respectively; and a control module for controlling the opening and closing of the water supply tank drainage valve to adjust the water level according to the water level, and controlling the start and stop of the ice water pump according to the comparison of the water temperature with a preset threshold. When the water temperature is higher than the first preset threshold, the ice water pump is started; when it is lower than the second preset threshold, the ice water pump is turned off. This application simulates the constant temperature environment of the seabed on land by constructing a circulating water tank and an ice water cold source, realizing the automatic stabilization of the test water temperature and the dynamic balance of water volume, solving the problem of land-based testing, ensuring the safety, stability and automation of the test, and avoiding water waste.

Description

Technical Field

[0001] This invention relates to the field of water cooling technology, and more specifically to a testing system and method for testing the cooling function of a subsea data center. Background Technology

[0002] With technological advancements and development, an increasing number of data centers are being built, and submarine data centers, as a new type of data center that saves energy, water, and land, are also booming. While conventional land-based data centers are built on land and then installed and operated at the same location, submarine data centers are constructed on land. After construction and land testing, they must be loaded onto ships and transported by sea before being deployed to the seabed. The cooling system of a submarine data center uses seawater as its cold source, transferring heat from the data center's interior to the seawater. After construction on land, the cooling function of the submarine data center needs to be tested at the construction site. However, construction sites often lack outdoor heat dissipation conditions and sufficient freshwater or seawater to simulate the seabed environment for cooling tests. This makes it impossible to build a testing environment for the cooling system and verify its performance in the absence of a natural cold source. Summary of the Invention

[0003] This invention provides a testing system and method for testing the cooling function of subsea data centers, in order to solve the problem that the cooling function of subsea data centers cannot be effectively tested in construction sites lacking natural cold sources.

[0004] In a first aspect, the present invention provides a testing system for testing the cooling function of a subsea data center. The subsea data center cooling device includes a seawater pump and a drainage pipe. The testing system includes: A water supply tank is used to house seawater pumps. The inlet of the seawater pumps is submerged in the water of the water supply tank, and a drain pipe is used to drain water into the water supply tank. The water supply tank is equipped with a drain valve. The chilled water supply module includes a chilled water tank and a chilled water pump. The chilled water tank is equipped with ice blocks and chilled water containing melted ice blocks, and the chilled water pump is used to deliver chilled water to the supply tank. The first water level detection device is used to detect the water level in the water supply tank; The first water temperature detection device is used to detect the water temperature in the water supply tank; The control module is communicatively connected to the chilled water pump, the drain valve, the first water level detector, and the first water temperature detector. The control module is configured to control the opening and closing of the drain valve to adjust the water level in the water supply tank based on the detection data of the first water level detector. When the detection value of the first water temperature detector is higher than a first preset threshold, the chilled water pump is started; when the detection value is lower than a second preset threshold, the chilled water pump is turned off. The first preset threshold is higher than the second preset threshold.

[0005] Beneficial Effects: This invention successfully simulates a constant-temperature underwater environment on land, where natural cooling sources are lacking, by constructing a circulating water tank with an ice water supply module. This solves the problem of not being able to effectively test the cooling function of underwater data centers on land. The control module automatically adjusts the start and stop of the ice water pump based on the water temperature and automatically controls the drain valve based on the water level, achieving automatic stabilization of the test water temperature and dynamic balance of water volume. This avoids water waste and ensures the safety, stability, and automation of the testing process.

[0006] In one optional embodiment, an ice water pipeline is arranged between the ice water pool and the water supply pool, an ice water pump is installed on the ice water pipeline, and a water distribution device is provided at the end of the ice water pipeline. The water distribution device is a structure in which several small-diameter branch pipes are arranged on a large-diameter main pipe, and the branch pipes are evenly distributed in the water supply pool.

[0007] Beneficial effects: The water distribution device disperses chilled water into multiple points and injects it into the water supply pool at high speed, which greatly increases the contact area and mixing effect between the chilled water and the pool water. It eliminates the temperature stratification phenomenon caused by traditional single-point water injection, and allows the cold energy to be released evenly and quickly throughout the water pool, thereby ensuring the consistency of water temperature throughout the water supply pool and improving the accuracy of temperature control.

[0008] In one alternative implementation, a melting water pipeline is arranged between the ice water pool and the water supply pool, and the melting water pipeline is equipped with an ice-melting pump for delivering melting water to the ice water pool.

[0009] Beneficial effects: The ice-melting pump transports warm water, which has absorbed heat from the water supply pool, to the ice-water pool, using the temperature difference to accelerate the melting of ice blocks and achieve dynamic regeneration of ice water. This design not only significantly improves ice utilization and cold energy release efficiency, but also reduces dependence on external water sources and the frequency of manual ice addition, realizing the recycling of water resources and intelligent management of cold sources.

[0010] In one alternative implementation, the outlet of the meltwater pipeline is located above the area where ice is added to the ice water pool.

[0011] Beneficial effects: Spraying warm water onto ice blocks from above fully utilizes gravity to allow the water to flow over the ice surface, greatly increasing the contact area and heat exchange time between the warm water and the ice, thus improving melting efficiency. At the same time, it avoids the problem of the ice water pump drawing in warm water and affecting the cooling effect, which is caused by directly injecting warm water into the pool bottom, ensuring the stability of the ice water temperature.

[0012] In one optional implementation, the detection system further includes a second water level detector and an alarm device. The second water level detector is used to detect the water level in the ice water pool. The control module is configured to issue an alarm signal prompting the addition of ice when the detected value of the second water level detector is lower than a third preset threshold.

[0013] Beneficial effects: By monitoring the ice water tank level in real time and issuing low water level warnings, test interruptions or damage to the ice water pump due to ice water depletion can be prevented, ensuring the continuity of testing. Simultaneously, the water level data can be recorded and traced, which helps analyze the ice consumption rate, optimize ice replenishment plans and procurement quantities, and achieve lean management.

[0014] In one alternative implementation, the volume of the ice water tank is smaller than the volume of the water supply tank.

[0015] Beneficial effects: Based on heat balance calculations, the flow rate required by the chilled water pump is much smaller than that of the seawater pump, therefore the chilled water tank does not need to be the same size as the supply water tank. The smaller volume significantly reduces equipment procurement, manufacturing costs, and site occupation, while enabling faster system response, facilitating water level control and lean ice-addition management, resulting in excellent economy and flexibility.

[0016] In one alternative embodiment, an ice-blocking structure is arranged outside the ice water pump to prevent ice blocks from approaching the ice water pump.

[0017] Beneficial effects: The ice-blocking structure forms a physical barrier around the inlet of the ice water pump, effectively preventing small ice pieces or ice fragments from being sucked into the pump body, avoiding equipment failures such as impeller jamming and blade damage caused by this, and significantly improving the operational reliability and service life of the ice water pump.

[0018] In one alternative implementation, the exterior of the ice water pool is provided with an insulation structure.

[0019] Beneficial effects: The insulation structure significantly reduces the rate of ineffective melting of ice by slowing down the transfer of external heat into the ice-water pool. The same amount of ice can sustain testing for a longer period, reducing the frequency of ice replenishment. Simultaneously, it prevents condensation and dripping from the outer wall of the ice-water pool under high temperature and humidity conditions, keeping the site dry and clean.

[0020] Secondly, the present invention also provides a method for testing the cooling function of a submarine data center cooling device using the above-mentioned testing system, comprising the following steps: Prepare the test environment by adding water and ice to the ice water tank to form ice water, and add water to the water supply tank to the water level required for the seawater pump to operate. Adjust the water temperature in the water supply tank to the set test water temperature; The cooling device performance was tested, the cooling device of the seabed data center was started, the water temperature of the water supply pool was kept stable during the test, and the water level of the ice water pool and the water supply pool were kept within the preset range. After the test is completed, stop all pumps from running.

[0021] Beneficial effects: It provides a complete and operable land-based testing procedure. By simulating the marine environment with a water supply tank and an infinitely large cold source with an ice-water module, it systematically solves key issues such as test environment construction, water temperature stabilization, and water level control, providing a standardized operating guide for accurately and reliably evaluating the performance of cooling devices on land.

[0022] In one optional implementation, the method for adjusting the water temperature in the water supply pool to the set test water temperature includes: if the water temperature in the water supply pool is lower than the set test water temperature, the water supply pool is heated by loading a load through the submarine data center module and circulating heat through a cooling device; if the water temperature in the water supply pool is higher than the set test water temperature, the water supply pool is cooled by pumping ice water into the water supply pool through an ice water pump.

[0023] Beneficial effects: The two-way adjustment mechanism allows for rapid and precise adjustment of the water temperature to the test starting point, regardless of the initial water temperature. This utilizes the heat generated by the cooling device itself, eliminating the need for additional heating equipment, and combines the forced cooling capability of ice water, making the test method widely adaptable and ensuring consistency of starting conditions across different batches of tests.

[0024] In one optional implementation, the method for the detection system to maintain the water level in the water supply tank includes: after the water level in the water supply tank is higher than a first preset water level, controlling the drain valve to open until the water level in the water supply tank drops to a second preset water level and then closing the drain valve.

[0025] Beneficial effects: By setting a dual-threshold water level control with a hysteresis range, the dynamic balance of water volume in the water supply tank can be accurately maintained, effectively preventing water tank overflow or pump cavitation caused by continuous injection of ice water. This control method avoids frequent start-stop of the drain valve due to slight fluctuations in the water surface, thus protecting the valve and stabilizing the test conditions.

[0026] In one alternative implementation, the method for the detection system to maintain the water level in the ice water pool includes: adding ice blocks into the ice water pool after the ice water level in the ice water pool is lower than a third preset water level.

[0027] Beneficial effects: It clarifies that maintaining the cold source by manually replenishing ice is suitable for the irregular shape of ice blocks, which makes automatic delivery difficult, while also ensuring operational flexibility. Operators can visually judge the cooling consumption based on the rate of water level drop, thereby precisely controlling the timing and amount of ice replenishment to ensure an uninterrupted cold source supply.

[0028] In one optional implementation, the method for maintaining the water temperature in the water supply tank at a set test water temperature includes: after the first water temperature detector detects that the water temperature in the water supply tank is higher than a first preset water temperature, controlling the start of the chilled water pump to pump chilled water into the water supply tank until the water temperature in the water supply tank drops to a second preset water temperature, and then controlling the chilled water pump to shut down.

[0029] Beneficial effects: By using hysteresis comparison to control the start and stop of the chilled water pump, the frequent start and stop of the chilled water pump due to small fluctuations in water temperature is effectively avoided, thereby stabilizing the water temperature in the water supply pool within a narrow range near the set value, ensuring the accuracy and repeatability of the test results.

[0030] In one alternative implementation, the seawater pump comprises two sets, and the performance test includes a fault condition test and a normal condition test. Methods for fault condition testing include: At least one condenser system of the cooling unit of the seabed data center was set to a fault state, while the remaining condenser systems were operated normally. This was to verify the automatic fault detection capability of the monitoring system of the cooling unit and whether the flow rate and head of the dual pumps met the design requirements. Methods for normal operating condition testing include: Set all condenser systems of the subsea data center cooling unit to normal operation, verify whether the flow rate and head of a single pump meet the design requirements, and verify whether multiple seawater pumps can automatically rotate according to the set time.

[0031] Beneficial effects: This study not only verified the single-pump performance of the cooling unit under normal conditions but also comprehensively tested the monitoring system's automatic fault diagnosis capabilities and dual-pump redundancy switching capabilities by simulating condenser failures. This ensures that the system can still operate reliably in the face of single-point failures during actual subsea operation, significantly improving the data center's security and fault tolerance.

[0032] In one alternative implementation, the performance test also includes adjusting the load rate of the subsea data center module to complete the performance test of the cooling device under different load rates.

[0033] Beneficial effects: By testing under different load rates, the performance curves of the cooling device can be comprehensively plotted across its entire operating range, obtaining data on its heat dissipation capacity, energy efficiency, and operational stability under varying heat loads. This provides crucial information for optimizing data center operation strategies and achieving refined energy management. Attached Figure Description

[0034] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of a testing system for testing the cooling function of an underwater data center, according to an embodiment of the present invention. Figure 2 This is a flowchart illustrating the cooling function testing method for a submarine data center cooling device according to an embodiment of the present invention.

[0036] Explanation of reference numerals in the attached figures: 100. Detection system; 1. Submarine data center cooling system; 11. Seawater pump; 13. Drainage pipe; 12. Condenser system; 2. Water supply tank; 21. Drain valve; 31. Ice water pool; 32. Ice water pump; 5. First water temperature detection component; 33. Chilled water pipeline; 34. Water distribution device; 341. Main pipe; 342. Branch pipe; 61. Meltwater pipeline; 62. Ice-melting pump; 7. Second water temperature detection component. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] The following is combined Figure 1 The following describes embodiments of the present invention.

[0039] According to an embodiment of the present invention, in one aspect, a testing system 100 for testing the cooling function of a seabed data center is provided. The seabed data center cooling device 1 includes a seawater pump 11 and a drain pipe 13. The testing system 100 includes a water supply tank 2, an ice water supply module, a first water level detector and a first water temperature detector 5.

[0040] The water supply pool 2 is used to house the seawater pump 11. The inlet of the seawater pump 11 is submerged in the water of the water supply pool 2. When the seawater pump 11 is running, it can supply water in the water supply pool 2 to the cooling device of the seabed data center to be tested. The water after heat exchange is discharged from the drain pipe 13 and drained into the water supply pool 2 to achieve water circulation and avoid waste of water resources.

[0041] The water supply tank 2 is equipped with a drain valve 21. The control module is connected to the ice water pump 32, the drain valve 21, the first water level detector, and the first water temperature detector 5 respectively. The first water level detector is used to detect the water level in the water supply tank 2. The control module is configured to control the opening and closing of the drain valve 21 according to the detection data of the first water level detector to adjust the water level in the water supply tank 2.

[0042] Because ice needs to be continuously added to the ice-water pool 31 to maintain a constant state of ice and water mixing, ensuring a stable water temperature, the continuously added ice melts into ice water, constantly increasing the overall water volume in the ice-water pool 31 and the water supply pool 2. When the water supply pool 2 has too much water, it overflows, which will affect the safety and stability of the testing process. Therefore, the drain valve 21 is automatically controlled according to the water level. When the water level in the water supply pool 2 reaches a certain height, it opens to release some water, and closes when the water level drops to a certain height, ensuring that the water level in the water supply pool 2 is always within a safe range.

[0043] The chilled water supply module includes a chilled water tank 31 and a chilled water pump 32. The chilled water tank 31 contains ice and chilled water with melted ice. The chilled water pump 32 is used to supply chilled water to the water supply tank 2. A first water temperature detector 5 is used to detect the water temperature in the water supply tank 2. When the detected value of the first water temperature detector 5 is higher than a first preset threshold, the chilled water pump 32 is started; when the detected value is lower than a second preset threshold, the chilled water pump 32 is turned off. The first preset threshold is higher than the second preset threshold.

[0044] This application is based on the construction of a land-based site lacking natural cold sources, and provides a stable testing environment for the cooling device 1 of the submarine data center by artificially constructing a cooling water source with a constant temperature.

[0045] Specifically, during operation of the subsea data center cooling device 1, seawater pump 11 draws water from the water supply pool 2, which flows through the condenser to absorb heat before being discharged back into the water supply pool 2 via drain pipe 13. The heat generated by the load of the subsea data center is continuously transferred to the water supply pool 2 through the cooling device, causing the water temperature in the water supply pool 2 to rise. In order to simulate the operating condition of constant seabed water temperature and maintain stable test conditions, it is necessary to control the temperature of the water supply pool 2 to be stable, that is, to lower the water temperature of the water supply pool 2.

[0046] This application uses ice as a cold source. An ice-water mixture is prepared in the ice-water pool 31 by mixing ice with ice water. The ice water is then supplied to the water supply pool 2 to cool the water supply pool 2 and stabilize the water temperature in the water supply pool 2 near the set test value.

[0047] In some embodiments, the water temperature in the water supply pool 2 is controlled at around 21°C. The cooling device of the seabed data center circulates water through the seawater pump 11. After heat exchange, the temperature difference between the inlet and outlet water is about 3°C, for example, from 21°C to 24°C. The temperature of the ice water in the ice water pool 31 is about 2°C, and the temperature difference between it and the set test water temperature of 21°C is 19°C.

[0048] According to the principle of heat balance, the flow rate required by the ice water pump 32 is only 15.8% of the flow rate of the seawater pump 11. This means that a large-flow seawater cooling device can be tested using a smaller-sized ice water pump 32 and piping, significantly reducing equipment costs and energy consumption.

[0049] In some embodiments, by calculating and controlling the flow ratio of the ice water pump 32 to the seawater pump 11, the water temperature in the water supply pool 2 can be kept stable while the ice water pump 32 is running continuously.

[0050] In some embodiments, the chilled water flow rate provided by the chilled water pump 32 is greater than the chilled water flow rate required to stabilize the water temperature of the water supply tank 2, so as to avoid the water temperature of the water supply tank 2 becoming too high due to untimely chilled water supply, which would affect the test results. At this time, the control module can control the start and stop of the chilled water pump 32 according to the water temperature in the water supply tank 2 to stabilize the water temperature of the water supply tank 2. When the chilled water supply is too large, the chilled water pump 32 is turned off to stop the chilled water supply, so as to avoid the water temperature of the water supply tank 2 becoming too low and affecting the test results. The chilled water pump 32 is turned on again to slowly cool the water supply tank 2 when the temperature of the water supply tank 2 drops below the second preset value, so as to stop the chilled water supply, and the process is repeated.

[0051] This application utilizes ice blocks in ice-water pool 31 to construct an artificial cold source, enabling the submarine data center cooling device 1 to be tested on a land-based construction site without seawater, overcoming geographical and environmental limitations. Ice blocks are readily available on the market and transportation is readily available. Approximately 3500 kg of ice blocks can support a full-load cooling device test for one hour, and the heat absorbed by melting ice blocks is approximately 93.06 kWh per 1000 kg of ice blocks, demonstrating economic viability. Since the flow rate of ice-water pump 32 is much smaller than that of seawater pump 11, smaller pumps and pipelines can be used; the volume of ice-water pool 31 can also be smaller than that of water supply pool 2, reducing equipment procurement and manufacturing costs.

[0052] Furthermore, the testing process is logically clear and simple to implement. It only requires monitoring the water temperature in the water supply tank 2 to automatically adjust the start and stop of the ice water pump 32, without the need for complex model calculations. The system mainly consists of standardized water tanks, submersible pumps, pipelines, and sensors. No special customized equipment is required, and it can be quickly set up on the construction site. The testing requirements and costs are low.

[0053] In some embodiments, refer to Figure 1 A chilled water pipeline 33 is arranged between the chilled water pool 31 and the water supply pool 2. A chilled water pump 32 is installed on the chilled water pipeline 33. A water distribution device 34 is provided at the end of the chilled water pipeline 33. The water distribution device 34 is a structure in which several small-diameter branch pipes 342 are arranged on a large-diameter main pipe 341. The branch pipes 342 are evenly distributed in the water supply pool 2.

[0054] Traditional single-point water injection methods result in uneven mixing of hot and cold water, creating a low-temperature zone near the injection point and a higher-temperature zone further away, thus causing temperature stratification. The water distribution device 34 breaks this stratification by distributing the ice water into multiple injection points, allowing the cooling energy to be released evenly throughout the entire pool space.

[0055] The design of the small-diameter branch pipe 342 allows the chilled water to be ejected at a high flow rate, forming jets. These jets, upon entering the water supply tank 2, generate strong shearing and entrainment effects with the surrounding water, causing the surrounding water to move along with them and accelerating the mixing process of the hot and cold water. The higher the jet velocity, the better the mixing effect.

[0056] The large-diameter main pipe 341 serves as the mother pipe, stabilizing and equalizing pressure. Due to the large diameter of the main pipe 341, the flow velocity within it is low, resulting in minimal friction loss and uniform pressure distribution. This design ensures that the inlet pressure of each branch pipe 342 is essentially the same, thereby ensuring uniform outflow from each branch pipe 342 and avoiding the problem of high flow rates in near-end branch pipes 342 and low flow rates in far-end branch pipes 342.

[0057] The water distribution device 34 divides a large stream of ice water into multiple smaller streams, which greatly increases the contact area between the ice water and the original water in the water supply pool 2, thereby accelerating the heat exchange process and enabling the coldness of the ice water to be quickly transferred to the surrounding water.

[0058] In some embodiments, refer to Figure 1 A melting water pipeline 61 is arranged between the ice water pool 31 and the water supply pool 2. The melting water pipeline 61 is equipped with an ice melting pump 62, which is used to deliver ice melting water to the ice water pool 31.

[0059] The ice water in ice water pool 31 serves as a cold source. Although the ice blocks in the ice water continuously melt into ice water, the amount of ice water supplied by the melting ice is far less than the amount of ice water pumped out by ice water pump 32. The ice water is then transported by ice water pump 32 to water supply pool 2 for cooling tests. As the test progresses, the ice water gradually decreases, and the water level drops. If it is not replenished in time, the ice water will be exhausted. Ice melting pump 62 pumps warm water with a higher temperature from water supply pool 2 onto the ice blocks in ice water pool 31. The temperature difference between the warm water and the ice blocks accelerates the melting of the ice blocks, achieving dynamic regeneration of ice water. This process not only accelerates the rate at which ice blocks melt and produce ice water, but also allows the warm water from the melting ice to exchange heat with the ice blocks and directly form ice water, thus maintaining a continuous supply of ice water.

[0060] In some embodiments, the outlet of the meltwater pipe 61 is located above the ice-placing area of ​​the ice water tank 31. Warm water flows from top to bottom over the surface of the ice blocks to fully utilize gravity, ensuring sufficient contact between the warm water and the ice blocks and expanding the heat exchange area. As the warm water flows over the ice blocks, it transfers heat to the ice blocks through convection, causing the ice surface to melt and form ice water. The warm water also exchanges heat with the ice blocks to form ice water, which then falls to the bottom of the tank. Compared to directly injecting warm water into the bottom of the ice water tank 31, this not only improves heat exchange efficiency but also avoids abnormal temperature distribution caused by an abnormal rise in water temperature near the ice water pump 32.

[0061] In some embodiments, a second water level detector is provided in the ice water tank 31 to monitor the ice water level in real time. The control module automatically controls the ice-melting pump 62 according to the rate of water level change.

[0062] When the test load is large and the cooling capacity is consumed quickly, the ice needs to melt faster, so the flow rate of the ice-melting pump 62 needs to be increased to replenish the ice water. Conversely, when the load is small or the test is intermittent, the ice melting rate can be slowed down, i.e., the flow rate of the ice-melting pump 62 can be reduced to save energy.

[0063] The detection system 100 also includes a second water level detector and an alarm device. The second water level detector is used to detect the water level in the ice water pool 31. The control module is configured to issue an alarm signal prompting the addition of ice when the detected value of the second water level detector is lower than a third preset threshold.

[0064] During the operation of the detection system 100, there are two main water transfer paths: The ice-water pump 32 path: It transports ice water from the ice-water pool 31 to the supply pool 2 for cooling. This process results in a decrease in the water volume in the ice-water pool 31 and an increase in the water volume in the supply pool 2. The ice-melting pump 62 path: It transports warm water from the supply pool 2 to the ice-water pool 31 to accelerate ice melting. This process causes some water to flow back to the ice-water pool 31.

[0065] However, since the flow rate of the ice-melting pump 62 is usually less than that of the ice-water pump 32, the flow rate of the ice-melting pump 62 only needs to match the melting rate of the ice. Therefore, the total water volume of the ice-water pool 31, i.e. the content of the ice-water mixture, shows a net decreasing trend during long-term operation, resulting in a continuous drop in the water level of the ice-water pool 31.

[0066] If ice and water are not replenished in time, the water level in ice water tank 31 will eventually fall below the suction port of ice water pump 32, causing the ice water pump 32 to cavitate, experience cavitation, or even be damaged, forcing the test to be interrupted. Therefore, it is necessary to monitor the water level in ice water tank 31 and prompt manual intervention when the water level is too low.

[0067] The second water level detector monitors the ice water level in the ice water tank 31 in real time and transmits the signal to the control module. The control module has a preset third threshold. This threshold water level is higher than the suction port of the ice water pump 32, with a certain margin to prevent air from entering the ice water pump 32 through vortex. It also ensures that the water level will not drop below the suction port of the ice water pump 32 within the time required for the operator to replenish ice after an alarm is triggered. Sufficient advance warning time can be provided based on the estimated rate of water level drop according to the test load.

[0068] When the real-time water level is lower than the third preset threshold, the control module triggers the alarm device, which emits an audible and visual signal or a remote signal to remind the operator to add ice to the ice water tank 31 in time. If necessary, the flow rate of the ice melting pump 62 can also be increased to supplement some water, thereby maintaining the water level of the ice water tank 31 within a safe range and ensuring the continuous progress of the test.

[0069] After the alarm signal is issued, the ice-adding operation is performed manually. The operator opens the cover of the ice-water pool 31 and puts the pre-prepared ice blocks or ice bags into the pool. At the same time, an appropriate amount of tap water can be added or the flow rate of the ice-melting pump 62 can be increased as needed. After the ice blocks are added, although the ice-melting process takes time, the large volume of the ice blocks will directly raise the water level. The operator can directly add water and ice to the ice-water pool 31 until the water and ice volume is sufficient, at which point the alarm will automatically deactivate, or it can be reset after manual confirmation.

[0070] In some embodiments, in addition to the warning function for adding ice, the second water level sensor can also be interlocked with the ice water pump 32 for protection. If the water level continues to drop to a lower emergency threshold, the control module can directly force the ice water pump 32 to stop operating, preventing equipment damage and issuing an emergency fault alarm.

[0071] With early warning, operators can replenish ice before the ice water runs out, avoiding test failure due to cold source interruption and ensuring that the test proceeds uninterrupted as planned.

[0072] The installation of a second water level sensor allows for the recording and traceability of water level data, facilitating the analysis of the relationship between ice consumption rate and test load. For example, by recording the time interval between two alarms, the average ice consumption rate under a specific load can be calculated, thereby optimizing ice replenishment plans and ice procurement quantities to avoid waste or shortages.

[0073] The second water level sensor can also prevent the ice water pool 31 from overflowing due to excessive ice melting or excessive water replenishment. The control module can issue an alarm and automatically stop the ice melting pump 62 or close the water replenishment valve when the second water level sensor detects a high water level, thus avoiding flooding of the site and waste of water resources.

[0074] The control module can record historical water level data, calculate the rate of water level decline (i.e., the height of decline per unit time), and predict the time required to reach the low water level threshold based on the current water level. When the predicted remaining time is less than a set value, such as 30 minutes, an early warning is issued, giving operators more time to react. This predictive alarm is more intelligent than simple threshold triggering and can handle rate fluctuations caused by load changes.

[0075] The ice-melting pump 62 adopts a one-in-one-backup design, with the two pumps redundantly supporting each other. Under normal operation, one pump can operate alone or alternately; when one fails, the other automatically switches to operation, ensuring uninterrupted ice-melting. Under extreme conditions, such as when the rate of ice water consumption is extremely fast, both pumps can operate simultaneously to accelerate ice melting at maximum flow rate, ensuring a stable supply of cold water.

[0076] By circulating the warm water in water supply tank 2 for ice melting, dynamic regeneration of water and ice water resources is achieved, significantly reducing the frequency of ice addition and human intervention.

[0077] The ice-melting pump 62 sprays warm water evenly onto the ice, causing it to melt uniformly from the surface, thus avoiding the problem of the ice accumulating in the center and remaining unmelted. This improves the melting efficiency, releases cold more fully, and reduces waste caused by unmelted ice.

[0078] Through a water level sensor and automatic control, the ice-melting pump 62 automatically starts melting ice when the water level is low and automatically stops when the water level is high, realizing intelligent management of the cold source. Operators only need to replenish ice periodically, greatly reducing labor intensity.

[0079] The flow rate of the ice-melting pump 62 can be adjusted according to actual needs, avoiding energy waste caused by over-pumping. Without ice-melting circulation, to maintain the water level in the ice water tank 31, it is necessary to continuously replenish new ice water, i.e., add extra ice and water. The ice-melting system recycles the water in the water supply tank 2, using the warm water that would otherwise be drained as a heat source for ice melting, reducing dependence on external water sources, saving water, and achieving cascaded energy utilization.

[0080] In some embodiments, the outlet of the meltwater pipe 61 can be replaced with a spray head, such as a mist nozzle or a fan nozzle, so that warm water is sprayed onto the ice in the form of a mist or fine droplets. The atomized water droplets have a larger specific surface area, resulting in more thorough contact with the ice and higher heat exchange efficiency. The spray head can be arranged above the ice water pool 31 to cover the entire ice storage area, or a mobile spray arm can be used for rotating spraying.

[0081] In other embodiments, a water distribution pipe with several small holes can be arranged at the bottom of the ice water pool 31. The ice-melting pump 62 sends warm water into the water distribution pipe and sprays it out of the small holes, directly impacting the ice blocks accumulated at the bottom. The warm water flows from bottom to top, forming a countercurrent heat exchange with the ice blocks, which can promote the overall melting of the ice blocks.

[0082] An agitator or circulation pump can be added to the ice water tank 31 to force the water in the tank to flow. While the ice-melting pump 62 injects warm water into the ice water tank 31, the agitator stirs the water, accelerates the mixing of warm water and ice, eliminates temperature stratification, and improves the overall melting rate.

[0083] In some embodiments, the ice-melting pump 62 can be driven by a variable frequency motor. The control module calculates the ice melting rate in real time based on the water level change rate of the ice-water pool 31 and dynamically adjusts the rotation speed and flow rate of the ice-melting pump 62. For example, when the water level drops rapidly, it indicates that the cooling energy consumption is high and the ice melting needs to be accelerated. At this time, the frequency of the ice-melting pump 62 is increased to increase the flow rate; when the water level is stable, the frequency can be reduced to maintain balance.

[0084] If the water level in water supply tank 2 is higher than that in ice water tank 31, gravity flow can be used instead of the ice-melting pump 62. A connecting pipe and valve are installed between water supply tank 2 and ice water tank 31. When ice melting is needed, the valve is opened, and warm water automatically flows into ice water tank 31 under gravity. This method does not consume electricity.

[0085] In some embodiments, the ice-melting pump 62 may also operate intermittently, injecting water into the ice-water pool 31 in a pulsed manner. For example, it may run for 5 minutes and then stop for 2 minutes, using the pulsed water flow to impact the ice blocks, causing the ice block surface to repeatedly undergo a wetting-drying process, which is beneficial for the renewal of the ice block surface and improves heat exchange efficiency.

[0086] In some embodiments, refer to Figure 1 A second water temperature sensor 7 can be added to the ice water pool 31 to detect the temperature of the ice water mixture. When the ice water temperature rises, it indicates that the ice melting pump 62 is supplying too much warm water or too little ice. The flow rate of the ice melting pump 62 can be reduced and more ice can be added. When the ice water temperature drops, it indicates that there is enough ice and the ice melting needs to be accelerated. The flow rate of the ice melting pump 62 needs to be increased.

[0087] In some embodiments, refer to Figure 1 The volume of ice water pool 31 is smaller than the volume of water supply pool 2.

[0088] Based on heat balance calculations, the flow rate of the ice-water pump 32 is much smaller than that of the seawater pump 11. This means that, per unit time, the amount of water pumped from the ice-water pool 31 is much less than the amount of water pumped from the water supply pool 2. Therefore, the total amount of ice-water required to maintain the test is relatively small, and the ice-water pool 31 does not need to have the same volume as the water supply pool 2, thus allowing for a significant reduction in size. The core function of the ice-water pool 31 is to store cold energy in the form of ice and ice-water, rather than storing large amounts of water. The latent heat of phase change of ice is much greater than the sensible heat of water, therefore, the amount of cold energy provided by a unit volume of ice-water mixture is much greater than that of the same volume of room temperature water. By using a smaller ice-water pool 31 in conjunction with ice, sufficient cold energy required for the test can be stored within a limited space.

[0089] During the test, the ice water pump 32 continuously pumps away ice water, while the ice-melting pump 62 returns warm water to the ice water tank 31 to accelerate ice melting. The water volume in the ice water tank 31 is dynamically changing, but generally shows a slow downward trend. The smaller ice water tank 31 means faster water level changes, but it also makes the system response more rapid and easier to control. Operators can intuitively judge the rate of cooling consumption by the rate of water level change, facilitating timely adjustments to the test strategy or ice-adding plan. At the end of the test or when paused, the small-volume ice water tank 31 has less remaining ice, minimizing waste due to unmelted ice. Operators can precisely control the amount of ice added as needed, achieving lean management.

[0090] The chilled water tank 31 requires equipment such as an insulation structure, a water level sensor, a chilled water pump 32, and an ice-melting pump 62. Its manufacturing cost is directly proportional to its volume. While meeting the cooling requirements, minimizing the volume of the chilled water tank 31 can significantly reduce equipment investment and space occupation, and facilitate flexible layout.

[0091] The ratio of the volume of the ice water tank 31 to the volume of the water supply tank 2 can be designed to be 1:5 to 1:10. For example, when the volume of the water supply tank 2 is 100 m³, the volume of the ice water tank 31 can be designed to be 10-20 m³. This ratio can meet typical testing requirements and is also economical.

[0092] For applications requiring prolonged full-load testing or where ice supply is inconvenient, the volume of the ice water tank 31 can be appropriately increased to store more ice and reduce the frequency of ice replenishment. Multiple ice water tanks 31 can also be configured. Different combinations of numbers can be flexibly implemented to achieve dynamic volume adjustment.

[0093] In some embodiments, an ice-blocking structure is arranged outside the ice water pump 32 to prevent ice from approaching the pump. When the ice water pump 32 operates, it generates negative pressure, which can easily draw small pieces of ice into the pump. Ice entering the pump body can cause impeller jamming, blade damage, or even pump body rupture. The ice-blocking structure protects the pump by setting a physical barrier around the pump's suction port, keeping ice at a certain distance and allowing only water to pass through.

[0094] In some embodiments, the ice water pool 31 is provided with an insulation structure on the outside. The insulation structure increases the thermal resistance of the heat transfer path by adding a layer of low thermal conductivity material to the outer wall of the ice water pool 31, slowing down the rate at which heat from the external environment enters the ice water pool 31. This significantly reduces the amount of heat entering the ice water pool 31, slows down the melting rate of the ice, and allows the same amount of ice to be used for a longer test time, thus reducing the frequency of adding ice.

[0095] In high-temperature and high-humidity environments, the temperature of the outer wall of ice water pool 31 may be lower than the air dew point temperature, causing condensation and dripping water. The insulation structure can keep the outer wall temperature close to the ambient temperature, preventing condensation and keeping the site dry and clean.

[0096] The insulation structure not only reduces the intrusion of external heat, but also slows down the temperature fluctuations in the ice water pool 31, making the ice water temperature more stable and facilitating precise control of the water temperature in the water supply pool 2.

[0097] Both the ice water pump 32 and the ice melting pump 62 are operated on a standby basis, with redundancy and backup. In extreme cases, both pumps can operate simultaneously. To ensure the accuracy of water temperature and water level testing in the water supply tank 2 and the ice water tank 31, each tank is equipped with two or more water temperature sensors and water level sensors, which not only provide redundancy in case of failure but also allow for comparison and reference between them.

[0098] Secondly, the present invention also provides a method for detecting the cooling function of a submarine data center cooling device 1 using the above-mentioned detection system 100, such as... Figure 2 As shown, it includes the following steps: S1, Prepare the test environment by adding water and ice to the ice water pool 31 to form ice water, and add water to the water supply pool 2 to the water level required for the operation of the seawater pump 11.

[0099] In actual operation of the submerged data center, the seawater pump 11 is submerged in seawater, directly drawing seawater, exchanging heat through a condenser, and then discharging it back into the sea. This method simulates the marine environment by constructing a water supply tank 2, submerging the seawater pump 11 in the tank, thus ensuring that the water intake conditions of the submerged pump 11 are consistent with actual operating conditions. This forms a closed-loop system identical to actual operation, making the operating conditions of the seawater pump 11 consistent with real-world operation, thereby accurately testing the performance of the cooling device.

[0100] In the actual seabed environment, seawater acts as an infinitely large cold source with a relatively stable temperature, capable of absorbing an unlimited amount of heat. This natural cold source is lacking in terrestrial testing sites. This method employs a combination of an ice-water pool 31 and an ice-water pump 32 to artificially construct a cold source with an adjustable water supply pool 2. By supplying ice water to the water supply pool 2, it is possible to simulate the stable temperature of seawater. The latent heat of phase change of ice provides high-density cold storage, enabling sufficient cooling within a limited space.

[0101] S2, adjust the water temperature in water supply tank 2 to the set test water temperature.

[0102] In some embodiments, the method of adjusting the water temperature in the water supply tank 2 to the set test water temperature includes: if the water temperature in the water supply tank 2 is lower than the set test water temperature, the water supply tank 2 is heated by loading a load through the seabed data center module and circulating heat through the cooling device; if the water temperature in the water supply tank 2 is higher than the set test water temperature, the water supply tank 2 is cooled by pumping ice water to the water supply tank 2 through the ice water pump 32.

[0103] The initial water temperature in water supply tank 2 may be higher or lower than the set test water temperature, depending on factors such as ambient temperature, water source temperature, and season. This method employs a two-way adjustment mechanism: In the heating direction, when the water temperature is lower than the set value, the cooling device itself generates heat through a load simulator, causing the water temperature to rise naturally. In the cooling direction, when the water temperature is higher than the set value, ice water is introduced via ice water pump 32 for forced cooling, quickly bringing the water temperature back to the set range. This two-way adjustment ensures that the test starting point can be reached quickly and accurately regardless of the initial water temperature, making the test widely adaptable.

[0104] Therefore, there is no need to equip the system with dedicated heating and cooling equipment, which reduces system investment costs and maintenance workload.

[0105] By precisely adjusting the water temperature to the set value before starting the test, the starting conditions for different test batches and different test conditions are kept consistent, which improves the comparability and repeatability of the test results.

[0106] In some embodiments, the adjustment process is divided into two stages: coarse adjustment and fine adjustment. In the coarse adjustment stage: when the water temperature deviates significantly from the set value, maximum capacity adjustment is used. If cooling is required, both chilled water pumps 32 are started simultaneously at full speed; if heating is required, the pump is loaded to full load for rapid heating. In the fine adjustment stage: when the water temperature approaches the set value, the process switches to fine adjustment using a single variable frequency pump, or fine adjustment is performed by slightly increasing or decreasing the load.

[0107] S3, conduct a performance test of the cooling device, start the cooling device 1 of the seabed data center, maintain the water temperature of the water supply pool 2 stable during the test, and maintain the water level of the ice water pool 31 and the water supply pool 2 within the preset range.

[0108] During the test, the heat generated by the load of the underwater data center was transferred to the water supply tank 2 through the cooling device, causing the water temperature in the water supply tank 2 to rise. To maintain a stable water temperature, the temperature of the water supply tank 2 must be lowered. This method uses an ice water pump 32 to supply ice water to the water supply tank 2, thereby lowering the temperature inside the water supply tank 2. The control module adjusts the start / stop or flow rate of the ice water pump 32 in real time based on the water temperature feedback to achieve dynamic heat balance and keep the water temperature in the water supply tank 2 stable near the set value.

[0109] The ice water pump 32 continuously pumps ice water from the ice water tank 31 to the supply water tank 2, resulting in a decrease in the water volume in the ice water tank 31 and an increase in the water volume in the supply water tank 2. Simultaneously, the ice-melting pump 62 pumps warm water from the supply water tank 2 back to the ice water tank 31 for ice melting, causing some water to flow back. However, the net effect is a decrease in the water volume in the ice water tank 31 and an increase in the water volume in the supply water tank 2. Therefore, the water levels in both tanks should be maintained within a safe range.

[0110] In some embodiments, the method of the detection system 100 to maintain the water level of the water supply tank 2 includes: after the water level in the water supply tank 2 is higher than a first preset water level, controlling the drain valve 21 to open, until the water level in the water supply tank 2 drops to a second preset water level and then closing the drain valve 21.

[0111] During testing, the flow rate of the ice water pump 32 is typically greater than that of the ice melting pump 62. If left uncontrolled, the water level in the water supply tank 2 will continue to rise, potentially leading to overflow, equipment flooding, and altered suction conditions for the seawater pump 11. This method utilizes the drain valve 21 to actively drain water, maintaining a dynamic balance in the water supply tank 2 and ensuring the water level remains within a safe operating range.

[0112] When the water level rises to the first preset level, the drain valve 21 is triggered to open. When the water level drops to the second preset level, the drain valve 21 is triggered to close. The first preset level is higher than the second preset level, forming a hysteresis range between them. This design avoids the frequent opening and stopping of the drain valve 21 caused by small fluctuations in the water level in single-threshold control, thus protecting the valve and stabilizing the water level.

[0113] Sufficient safety height should be maintained between the first preset water level and the highest water level to avoid overflow due to drainage delays or valve response time. Considering the impact of water surface fluctuations on measurement, the second preset water level should be higher than the upper limit of fluctuation. The second preset water level should ensure that the water level is higher than the minimum suction depth of the seawater pump 11 to prevent vortex air intake and leave sufficient margin to prevent the seawater pump 11 from sucking in air due to excessively rapid water level drop.

[0114] In some embodiments, the method of the detection system 100 maintaining the water level of the ice water pool 31 includes: adding ice blocks into the ice water pool 31 after the ice water level in the ice water pool 31 is lower than a third preset water level.

[0115] The water level in ice pool 31 is controlled by manual ice replenishment. Ice blocks, serving as the cold source, require periodic manual addition. This is because the large size and irregular shape of ice blocks make fully automated continuous ice replenishment difficult to achieve at present. Manual ice replenishment is flexible and reliable, allowing the timing and amount of ice replenishment to be determined based on the rate of water level drop.

[0116] The ice-melting pump 62 is automatically controlled by the control module, starting and stopping based on water level feedback. The control module calculates the ice melting rate in real time based on the water level change rate in the ice-water pool 31 and dynamically adjusts the rotational speed and flow rate of the ice-melting pump 62. For example, when the water level drops rapidly, it indicates high cooling consumption, requiring accelerated ice melting; in this case, the frequency of the ice-melting pump 62 is increased to increase the flow rate. When the water level is stable, the frequency can be reduced to maintain balance.

[0117] In some embodiments, the method for maintaining the water temperature of the water supply tank 2 at a set test water temperature includes: after the first water temperature detector 5 detects that the water temperature in the water supply tank 2 is higher than the first preset water temperature, controlling the ice water pump 32 to start pumping ice water into the water supply tank 2 until the water temperature in the water supply tank 2 drops to the second preset water temperature, and then controlling the ice water pump 32 to shut down.

[0118] The flow rate ratio of ice water pump 32 to seawater pump 11 is calculated to have a small temperature change per unit time, eliminating the need for frequent start-stop of ice water pump 32. Furthermore, through hysteresis comparison control, the water temperature in water supply pool 2 can be stabilized near the set value, ensuring the accuracy and repeatability of the test results and avoiding water temperature oscillations caused by frequent start-stop.

[0119] In some embodiments, the seawater pump 11 includes two sets, and the performance test includes a fault condition test and a normal condition test. Methods for fault condition testing include: At least one condenser system 12 of the cooling device 1 for the seabed data center is set to a fault state, while the other condenser systems 12 are operating normally. This verifies the automatic fault detection capability of the monitoring system of the cooling device for the condenser, as well as whether the flow rate and head of the dual pumps meet the design requirements. Specifically, such as Figure 1 As shown, the cooling device includes four condensers. One condenser is left uncharged to simulate a Freon leak in the other condenser. The remaining three condenser systems 12 are charged with Freon according to the design requirements and are considered normal cooling devices.

[0120] Turn on one set of seawater pumps 11 on the subsea data center module, and load the internal load of the subsea data center module to full capacity; verify whether the monitoring system of the cooling system can determine the condenser failure by the difference between the temperature difference between the condenser inlet and outlet water and the temperature difference between the average temperature inside the cabin and the condenser inlet water temperature and the design temperature difference, and automatically enter the dual-pump operation mode; verify whether the second set of seawater pumps 11 can start automatically, and at the same time adjust the operating frequency of the two sets of seawater pumps 11 to ensure that the flow rate of the seawater pumps 11 in the cooling device is the design flow rate of the dual pumps; verify whether the flow rate and head under the dual-pump operation mode meet the design requirements of the cooling device.

[0121] Methods for normal operating condition testing include: Set all condenser systems 12 of the seabed data center cooling device 1 to normal operation, verify whether the flow rate and head of a single pump meet the design requirements, and verify whether multiple seawater pumps 11 can automatically rotate according to the set time.

[0122] Based on the fault condition, the condenser system 12, which was not charged with Freon, was charged with Freon to restore it to normal cooling status.

[0123] After the test officially started, a set of seawater pump 11 on the seabed data center module was turned on, and the operating frequency of seawater pump 11 was adjusted to ensure that the flow rate of seawater pump 11 in the cooling device was the design flow rate of a single pump; to verify whether the flow rate and head under the single pump operating condition met the design requirements of the cooling device.

[0124] During the test, it was verified whether the two sets of seawater pumps 11 in the cooling device could automatically alternate operation according to the set time. After the test started, the first set of seawater pumps 11 began to run. After the set rotation time was reached, the second set of seawater pumps 11 was automatically started. After the system detected that the second set of seawater pumps 11 had switched operation normally, the first set of seawater pumps 11 was automatically stopped. After the second set of seawater pumps 11 had run for the set rotation time, the system automatically started the first set of seawater pumps 11 again. After the system detected that the first set of seawater pumps 11 was running normally, the test was confirmed to be complete.

[0125] In some embodiments, performance testing also includes adjusting the load rate of the subsea data center module to complete performance tests of the cooling function under different load rates. For example, testing the performance of the cooling device under various load rates such as 20%, 40%, and 80%.

[0126] S4. After the test is completed, stop all pumps from running.

[0127] After testing is completed, seawater pump 11 will be reinstalled on top of the seabed data center compartment, restoring it to its normal installation state before deployment at sea.

[0128] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined in this application.

Claims

1. A testing system for testing the cooling function of an underwater data center, characterized in that, The cooling system for the subsea data center includes a seawater pump (11) and a drain pipe (13), and the detection system (100) includes: A water supply tank (2) is used to house the seawater pump (11), the inlet of the seawater pump (11) is submerged in the water of the water supply tank (2), and the drain pipe (13) is used to drain water into the water supply tank (2); the water supply tank (2) is equipped with a drain valve (21). The ice water supply module includes an ice water tank (31) and an ice water pump (32). The ice water tank (31) is filled with ice blocks and ice water containing melted ice blocks. The ice water pump (32) is used to deliver ice water to the water supply tank (2). The first water level detection device is used to detect the water level in the water supply tank (2); The first water temperature detection component (5) is used to detect the water temperature in the water supply tank (2); The control module is connected to the ice water pump (32), the drain valve (21), the first water level detector, and the first water temperature detector (5) respectively. The control module is configured to control the opening and closing of the drain valve (21) according to the detection data of the first water level detector to adjust the water level of the water supply tank (2). When the detection value of the first water temperature detector (5) is higher than the first preset threshold, the ice water pump (32) is started; when the detection value is lower than the second preset threshold, the ice water pump (32) is turned off. The first preset threshold is higher than the second preset threshold.

2. The detection system according to claim 1, characterized in that, A chilled water pipeline (33) is arranged between the chilled water pool (31) and the water supply pool (2). The chilled water pump (32) is located on the chilled water pipeline (33). A water distribution device (34) is provided at the end of the chilled water pipeline (33). The water distribution device (34) is a structure in which several small-diameter branch pipes (342) are arranged on a large-diameter main pipe (341). The branch pipes (342) are evenly distributed in the water supply pool (2).

3. The detection system according to claim 1, characterized in that, A melting water pipeline (61) is arranged between the ice water pool (31) and the water supply pool (2). The melting water pipeline (61) is equipped with an ice melting pump (62), which is used to deliver ice melting water to the ice water pool (31).

4. The detection system according to claim 3, characterized in that, The outlet of the meltwater pipeline (61) is located above the ice block placement area of ​​the ice water pool (31); And / or, the detection system (100) further includes a second water level detector and an alarm device, wherein the second water level detector is used to detect the water level height of the ice water in the ice water pool (31), and the control module is configured to issue an alarm signal prompting the addition of ice when the detection value of the second water level detector is lower than a third preset threshold.

5. The detection system according to claim 1, characterized in that, The volume of the ice water pool (31) is smaller than the volume of the water supply pool (2); And / or, the ice pump (32) is provided with an ice-blocking structure to prevent ice blocks from approaching the ice pump (32); And / or, the ice water pool (31) is provided with an external heat insulation structure.

6. A method for detecting the cooling function of a subsea data center using the detection system described in any one of claims 1-5, characterized in that, The method includes the following steps: Prepare the test environment by adding water and ice to the ice water pool (31) to form ice water, and add water to the water supply pool (2) to the water level required for the operation of the seawater pump (11); Adjust the water temperature in the water supply tank (2) to the set test water temperature; The cooling device performance test was carried out. The cooling device (1) of the seabed data center was started. During the test, the water temperature of the water supply pool (2) was kept stable, and the water level of the ice water pool (31) and the water supply pool (2) was kept within the preset range. After the test is completed, stop all pumps from running.

7. The detection method according to claim 6, characterized in that, The method of adjusting the water temperature in the water supply pool (2) to the set test water temperature includes: if the water temperature in the water supply pool (2) is lower than the set test water temperature, the water supply pool (2) is heated by loading the load through the seabed data center module and circulating heat through the cooling device; if the water temperature in the water supply pool (2) is higher than the set test water temperature, the water supply pool (2) is cooled by pumping ice water to the water supply pool (2) through the ice water pump (32).

8. The detection method according to claim 6, characterized in that, The method by which the detection system (100) maintains the water level of the water supply tank (2) includes: after the water level in the water supply tank (2) is higher than the first preset water level, controlling the drain valve (21) to open until the water level in the water supply tank (2) drops to the second preset water level and then closing the drain valve (21).

9. The detection method according to claim 6, characterized in that, The method by which the detection system (100) maintains the water level of the ice water pool (31) includes: after the ice water level in the ice water pool (31) is lower than the third preset water level, ice blocks are added to the ice water pool (31).

10. The detection method according to claim 6, characterized in that, The method for maintaining the water temperature of the water supply tank (2) at the set test water temperature includes: after the first water temperature detection device (5) detects that the water temperature in the water supply tank (2) is higher than the first preset water temperature, the ice water pump (32) is controlled to start pumping ice water to the water supply tank (2) until the water temperature of the water supply tank (2) drops to the second preset water temperature, and then the ice water pump (32) is controlled to shut down.

11. The detection method according to claim 6, characterized in that, The seawater pump (11) consists of two sets, and the performance test includes fault condition test and normal condition test; The method for fault condition testing includes: Set at least one condenser system (12) of the cooling device (1) of the seabed data center to a fault state, while the other condenser systems (12) operate normally to verify the automatic judgment capability of the monitoring system of the cooling device for condenser faults, and whether the flow rate and head of the dual pumps meet the design requirements. The method for normal operating condition testing includes: Set all condenser systems (12) of the seabed data center cooling device (1) to normal operation, verify whether the flow rate and head of a single pump meet the design requirements, and verify whether multiple seawater pumps (11) can automatically rotate according to the set time.

12. The detection method according to claim 6, characterized in that, The performance test also includes adjusting the load rate of the subsea data center module and completing the performance test of the cooling device under different load rates.

Images