Heat exchange amount testing system and equipment

Abstract

The utility model discloses a heat exchange amount testing system and equipment, which are used for testing the heat exchange amount of the secondary side of a CDU. The heat exchange amount testing system comprises a closed box body, measuring equipment and temperature adjusting equipment arranged in the closed box body, liquid is contained in the closed box body, the closed box body comprises a liquid supply interface and a liquid return interface, the liquid supply interface is connected with tested equipment through a first pipeline, the liquid return interface is connected with the tested equipment through a second pipeline, and the temperature adjusting equipment is arranged in the closed box body. When a heat exchange amount test is carried out on the tested equipment, liquid in the closed box body flows to the tested equipment through the first pipeline and flows back to the closed box body through the second pipeline; the temperature adjusting equipment is used for adjusting the temperature of the liquid in the closed box body in the heat exchange amount testing process and keeping the temperature of the liquid constant; and the measuring equipment is used for determining the heat exchange amount of the measured equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of heat testing, in particular to a heat exchange testing system and equipment. Background Art

[0002] With the development of artificial intelligence and large models, the performance of data center server chips is rapidly iterating, bringing new challenges to energy conservation and heat dissipation. Cold plate liquid cooling technology can help data centers improve performance while reducing energy consumption and carbon emissions, and it has gradually become a new trend in the future development of data centers.

[0003] The Coolant Distribution Unit (CDU) is an important component of the liquid cooling system. Its core is mainly composed of a heat exchanger and a coolant pump, which is used to exchange heat from the secondary side (server side) to the primary side (cooling side).

[0004] The enthalpy difference chamber, also known as the air enthalpy difference method test chamber, includes both air and water systems. The air system measures the heat exchange rate of air-cooled air conditioners using the air enthalpy difference method, while the water system provides water at a constant temperature and flow rate to measure the heat exchange rate of water-cooled and chilled water air conditioners. The heat exchange rate on the primary side of a CDU is typically tested using an enthalpy difference chamber. However, the water system in an enthalpy difference chamber is an open system, while the secondary side of the CDU is a closed, pressurized system. Therefore, the enthalpy difference chamber cannot provide the system pressure required for testing, making existing enthalpy difference chambers incapable of measuring the heat exchange rate on the secondary side of a CDU.

[0005] In summary, there is an urgent need for a heat transfer test system to test the heat transfer on the secondary side of the CDU. Utility Model Content

[0006] The utility model provides a heat exchange capacity testing system for testing the heat exchange capacity of a CDU secondary side.

[0007] In a first aspect, an embodiment of the present invention provides a heat exchange capacity testing system, the system comprising: a sealed box, a measuring device, and a temperature control device disposed in the sealed box, wherein:

[0008] The sealed box is filled with liquid, and the sealed box includes a liquid supply interface and a liquid return interface. The liquid supply interface is connected to the device under test through a first pipeline, and the liquid return interface is connected to the device under test through a second pipeline. When the heat exchange capacity test is performed on the device under test, the liquid in the sealed box flows to the device under test through the first pipeline and flows back to the sealed box through the second pipeline. The first pipeline is provided with a first temperature sensor, the second pipeline is provided with a second temperature sensor, and the first pipeline and / or the second pipeline are provided with a first flow sensor;

[0009] The temperature regulating device is used to regulate the temperature of the liquid in the sealed box during the heat exchange test to keep the temperature of the liquid constant;

[0010] The measuring device is used to obtain a first sampling value set and determine the heat exchange capacity of the device under test based on the first sampling value set, wherein the first sampling value set includes the sampling values ​​of the first temperature sensor, the sampling values ​​of the second temperature sensor and the sampling values ​​of the first flow sensor.

[0011] In the above system, during the heat exchange rate test, the temperature control device can adjust the temperature of the liquid in the sealed box to keep the temperature of the liquid constant. The liquid in the sealed box flows to the device under test through the liquid supply interface and the first pipeline, and flows back to the sealed box through the second pipeline and the return liquid interface. During this process, by obtaining the sampling value of the first temperature sensor set in the first pipeline, the sampling value of the second temperature sensor set in the second pipeline, and the sampling value of the first flow sensor set in the first pipeline and / or the second pipeline, the heat exchange rate of the device under test can be determined based on the obtained sampling values. When the device under test is a CDU, since the sealed box is a closed system, it can provide the test pressure required for the heat exchange rate test of the secondary side of the CDU. Therefore, the test system can be used to perform heat exchange rate tests on the secondary side of the CDU.

[0012] In one possible implementation, the temperature control device includes:

[0013] A heating device for heating the liquid in the sealed box;

[0014] Refrigeration equipment is used to provide refrigeration for the liquid in the closed box.

[0015] In the above system, the liquid in the closed box is heated by the heating equipment, and the refrigeration equipment provides cooling for the liquid in the closed box. During the heat exchange test, the temperature of the liquid in the closed box can be accurately controlled to ensure that the temperature of the liquid in the closed box is constant, that is, to ensure that the closed box can provide liquid with a constant temperature or constant heat load.

[0016] In a possible implementation, the device under test is a cooling distribution unit (CDU), and the refrigeration device is cooled by a water system of an enthalpy difference chamber that performs a heat exchange test on the primary side of the CDU.

[0017] In the above system, when the device under test is a CDU and the heat exchange rate on the primary side of the CDU is tested using an enthalpy difference chamber, the refrigeration device in the embodiment of the present invention can reuse the water system of the enthalpy difference chamber, and the water system of the enthalpy difference chamber that performs the heat exchange rate test on the primary side of the CDU provides cooling, thereby fully utilizing the water system of the enthalpy difference chamber, avoiding energy waste, and saving energy.

[0018] In one possible embodiment, the water system includes a water outlet and a water inlet, and the water outlet is connected to the water inlet through an external water circulation pipeline. Part of the water circulation pipeline is located in the closed box and performs heat exchange with the liquid in the closed box through a heat exchange coil.

[0019] In the above system, when the water system of the enthalpy difference chamber is used as a refrigeration device, since the secondary side of the CDU usually uses deionized water, PG25 and other solutions, not only the cleanliness requirements are high, but also material compatibility needs to be considered. Therefore, the pipe material of the water system of the enthalpy difference chamber cannot meet the requirements, and it cannot directly contact the liquid in the closed box. Therefore, the embodiment of the utility model uses a heat exchange coil to make the part of the water circulation pipeline located in the closed box exchange heat with the liquid in the closed box, avoiding direct contact between the water circulation pipeline and the liquid in the closed box, thereby meeting the liquid demand of the secondary side of the CDU while using the water system to provide cooling.

[0020] In a possible implementation, the system further includes:

[0021] a third temperature sensor, provided in the third pipe of the water circulation pipe between the water outlet of the water system and the closed box;

[0022] a fourth temperature sensor, provided in a fourth pipe of the water circulation pipe between the water inlet of the water system and the closed box;

[0023] a second flow sensor, disposed in the third pipeline and / or the fourth pipeline;

[0024] The measuring device is also used to obtain a second set of sampling values ​​and determine the heat exchange between the water system and the closed box based on the second set of sampling values, the second set of sampling values ​​including the sampling values ​​of the third temperature sensor, the sampling values ​​of the fourth temperature sensor and the sampling values ​​of the second flow sensor.

[0025] In the above system, by arranging a third temperature sensor in the third pipeline, a fourth temperature sensor in the fourth pipeline, and a second flow sensor in the third pipeline and / or the fourth pipeline, the heat exchange amount provided by the water system of the enthalpy difference chamber for the liquid in the closed box can be determined by obtaining the sampling value of the third temperature sensor, the sampling value of the fourth temperature sensor, and the sampling value of the second flow sensor.

[0026] In one possible embodiment, the first pipeline includes a first branch and a second branch connected in parallel, the first branch includes a first valve connected to the liquid supply interface and a water pump connected to the device under test, and the second branch includes a second valve connected between the liquid return interface and the device under test.

[0027] In the above system, by providing two branches connected in parallel in the first pipeline, the operating mode of the heat exchange test system can be adjusted by controlling the switching states of the first valve and the second valve.

[0028] In a possible implementation manner, the first branch further includes a one-way valve connected between the water pump and the device under test.

[0029] In the above system, by providing a one-way valve in the first branch, backflow of liquid in the first branch can be avoided, thereby facilitating the replenishment of liquid into the closed box.

[0030] In a possible embodiment, the system further includes: a liquid control pipeline for replenishing or draining the liquid in the closed box, one end of the liquid control pipeline is connected to an external container, and the other end is connected between the first valve and the water pump, and a third valve is provided in the liquid control pipeline.

[0031] In the above system, the liquid in the closed box can be easily replenished or discharged through the liquid control pipeline.

[0032] In one possible embodiment, the system further includes: a control device for controlling the switching states of the first valve, the second valve, and the third valve, controlling the working state of the water pump, and controlling the heating power of the heating device according to the operating mode of the system.

[0033] In the above system, the control device can control the switch status of each valve, the working status of the water pump, and the heating power of the heating device according to the system operation mode selected by the user, so that the system operates in the operation mode selected by the user.

[0034] In a possible implementation, the control device is specifically configured to perform one or more of the following operations:

[0035] When it is determined that the operating mode of the system is a test mode in which the liquid circulation power is provided by the device under test, controlling the closing of the first valve and the third valve and opening the second valve;

[0036] When it is determined that the operating mode of the system is a test mode in which the system provides liquid circulation power, controlling the closing of the second valve and the third valve, and opening the first valve and the water pump;

[0037] When it is determined that the operating mode of the system is an operating mode of providing a constant heat load liquid to the device under test, controlling the heating power of the heating device so that the heat provided by the heating device is equal to the sum of the system cooling capacity and the constant heat load, the system cooling capacity being the heat exchange between the cooling device and the closed box;

[0038] When it is determined that the operating mode of the system is a constant temperature heating mode for providing a liquid at a constant temperature to the device under test, controlling the heating power of the heating device based on the liquid temperature in the first pipe, the liquid temperature in the second pipe, and the liquid temperature in the sealed box obtained by the measuring device so that the heat provided by the heating device is greater than the cooling capacity of the system, so that the temperature of the liquid in the sealed box is kept constant;

[0039] When it is determined that the operating mode of the system is a constant temperature cooling mode for providing a liquid at a constant temperature to the device under test, controlling the heating power of the heating device based on the liquid temperature in the first pipe, the liquid temperature in the second pipe, and the liquid temperature in the closed box obtained by the measuring device so that the heat provided by the heating device is less than the cooling capacity of the system, so that the temperature of the liquid in the closed box is kept constant;

[0040] When it is determined that the operating mode of the system is a liquid replenishing mode for replenishing liquid into the closed box, controlling to open the third valve and the water pump, and closing the first valve and the second valve;

[0041] When it is determined that the operating mode of the system is a liquid discharge mode for discharging the liquid in the closed box, the first valve, the second valve and the third valve are controlled to open.

[0042] In the above system, the control device can control the switch status of each valve, the working status of the water pump, and the heating power of the heating device according to the system operation mode selected by the user, so that the system can flexibly switch between various operation modes.

[0043] In a possible implementation manner, an expansion tank is provided in the second pipeline.

[0044] In the above system, by arranging an expansion tank in the second pipeline, the pressure change caused by temperature change in the system can be stabilized, thereby improving the stability of the system.

[0045] In a possible implementation, the first pipeline and the second pipeline are respectively provided with pressure sensors, and the sealed box is provided with a temperature sensor, a pressure sensor, and a liquid level sensor.

[0046] In the above system, by respectively arranging pressure sensors in the first pipeline and the second pipeline, the liquid pressure in the first pipeline and the second pipeline can be monitored to determine whether the pressure meets the requirements of the secondary side of the CDU. By respectively arranging temperature sensors, pressure sensors and liquid level sensors in the closed box, the temperature, pressure and liquid level in the closed box can be monitored to facilitate the adjustment of the parameters of the liquid in the closed box.

[0047] In a possible implementation, the sealed box further includes an exhaust valve for exhausting the air in the sealed box and a safety valve for releasing the pressure in the sealed box.

[0048] In the above system, an exhaust valve and a safety valve are arranged on the closed box. The exhaust valve can discharge excess air in the closed box, and the safety valve can automatically open to release the pressure in the closed box when the pressure in the closed box is higher than the pressure relief pressure of the safety valve, thereby protecting the closed box.

[0049] In a second aspect, an embodiment of the present invention provides a heat exchange capacity testing device for performing a heat exchange capacity test on a CDU, the testing device comprising: the heat exchange capacity testing system and the enthalpy difference chamber testing system provided in the first aspect of the embodiment of the present invention;

[0050] The enthalpy difference chamber test system is used to test the heat exchange capacity of the primary side of the CDU;

[0051] The heat exchange capacity testing system is used to perform heat exchange capacity testing on the secondary side of the CDU.

[0052] The above-mentioned equipment can test the heat exchange rate on the primary side of the CDU through the enthalpy difference chamber test system, and can test the heat exchange rate on the secondary side of the CDU through the heat exchange rate test system provided by the embodiment of the utility model, thereby realizing the heat exchange rate test on the primary and secondary sides of the CDU. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0054] Figure 1 A schematic structural diagram of a heat exchange testing system provided in an embodiment of the present utility model;

[0055] Figure 2 A schematic structural diagram of another heat exchange testing system provided by an embodiment of the present utility model;

[0056] Figure 3 A schematic structural diagram of another heat exchange testing system provided in an embodiment of the present utility model;

[0057] Figure 4 A schematic structural diagram of another heat exchange testing system provided in an embodiment of the present utility model;

[0058] Figure 5A schematic structural diagram of another heat exchange testing system provided in an embodiment of the present utility model;

[0059] Figure 6 A schematic structural diagram of a heat exchange capacity testing device provided in an embodiment of the present utility model. DETAILED DESCRIPTION

[0060] To make the purpose, technical solutions, and advantages of the present invention more clearly apparent, the present invention will be further described in detail below with reference to the accompanying drawings. It is apparent that the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0061] In the description of the embodiments of the present invention, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present invention, “multiple” refers to two or more than two.

[0062] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to imply or suggest relative importance or implicitly indicate the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0063] Before introducing the heat exchange testing system provided by the embodiment of the present invention, in order to facilitate understanding, the technical background of the embodiment of the present invention is first introduced in detail.

[0064] With the development of artificial intelligence and large models, the performance of data center server chips is rapidly iterating, bringing new challenges to energy conservation and heat dissipation. Cold plate liquid cooling technology can help data centers improve performance while reducing energy consumption and carbon emissions, and it has gradually become a new trend in the future development of data centers.

[0065] CDU is an important component of the liquid cooling system. Its core is mainly composed of a heat exchanger and a coolant pump, which is used to exchange heat from the secondary side to the primary side.

[0066] The enthalpy difference chamber, also known as the air enthalpy difference method test chamber, includes both air and water systems. The air system measures the heat exchange rate of air-cooled air conditioners using the air enthalpy difference method, while the water system provides water at a constant temperature and flow rate to measure the heat exchange rate of water-cooled and chilled water air conditioners. The heat exchange rate on the primary side of a CDU is typically tested using an enthalpy difference chamber. However, the water system in an enthalpy difference chamber is an open system, while the secondary side of the CDU is a closed, pressurized system. Therefore, the enthalpy difference chamber cannot provide the system pressure required for testing, making existing enthalpy difference chambers incapable of measuring the heat exchange rate on the secondary side of a CDU.

[0067] In summary, there is an urgent need for a heat transfer test system to test the heat transfer on the secondary side of the CDU.

[0068] In view of this, an embodiment of the present invention provides a heat exchange capacity testing system and equipment. During the heat exchange capacity testing process, the temperature control device can adjust the temperature of the liquid in the sealed box to keep the temperature of the liquid constant. The liquid in the sealed box flows to the device under test through the liquid supply interface and the first pipeline, and flows back to the sealed box through the second pipeline and the return liquid interface. In this process, by obtaining the sampling value of the first temperature sensor set in the first pipeline, the sampling value of the second temperature sensor set in the second pipeline, and the sampling value of the first flow sensor set in the first pipeline and / or the second pipeline, the heat exchange capacity of the device under test can be determined based on the obtained sampling values. When the device under test is a CDU, since the sealed box is a closed system, it can provide the test pressure required for the heat exchange capacity test of the secondary side of the CDU. Therefore, the test system can be used to perform heat exchange capacity test on the secondary side of the CDU.

[0069] It should be noted that the heat exchange test system mentioned in the embodiment of the present invention, the device under test mentioned therein can be not only a CDU, but also a cold plate liquid-cooled server, and other devices using liquid cooling, and no further examples will be given here.

[0070] After introducing the background technology of the embodiment of the present invention, the heat exchange testing system provided by the embodiment of the present invention is described in detail below in conjunction with specific embodiments.

[0071] See Figure 1 As shown, it is a structural diagram of a heat exchange test system in an embodiment of the present invention, which includes: a sealed box 11, a measuring device 12, and a temperature control device 13 arranged in the sealed box 11.

[0072] The sealed box 11 is filled with liquid, and the sealed box 11 includes a liquid supply interface 111 and a liquid return interface 112. The liquid supply interface 111 is connected to the device under test 14 through a first pipeline, and the liquid return interface 112 is connected to the device under test 14 through a second pipeline. When the heat exchange rate test is performed on the device under test 14, the liquid in the sealed box 11 flows to the device under test 14 through the first pipeline and flows back to the sealed box 11 through the second pipeline. The first pipeline is provided with a first temperature sensor 15, the second pipeline is provided with a second temperature sensor 16, and the first pipeline and / or the second pipeline is provided with a first flow sensor 17.

[0073] The temperature regulating device 13 is used to regulate the temperature of the liquid in the sealed box 11 during the heat exchange test to keep the temperature of the liquid constant.

[0074] Measuring device 12 is configured to obtain a first set of sampled values ​​and determine the heat exchange capacity of device under test 14 based on the first set of sampled values. The first set of sampled values ​​includes sampled values ​​from first temperature sensor 15, sampled values ​​from second temperature sensor 16, and sampled values ​​from first flow sensor 17. The specific manner in which the heat exchange capacity is determined based on the sampled values ​​within the first set of sampled values ​​is not limited in this embodiment.

[0075] It should be noted that the liquid in the sealed box 11 can be different liquids depending on the actual test needs. For example, when the device under test 14 is a CDU, when testing the heat exchange capacity on the secondary side of the CDU, the liquid in the sealed box 11 can be deionized water, PG25, or other solutions. When the device under test 14 is a cold plate liquid-cooled server, the liquid in the sealed box 11 can also be water or coolant, etc. This embodiment of the utility model does not limit this. In addition, the number of temperature sensors and flow sensors installed in the first pipeline and the second pipeline is also not limited by this embodiment of the utility model.

[0076] During specific implementation, the measuring device may be a central processing unit (CPU) or a digital signal processing (DSP) chip, etc., which is not limited in the embodiment of the present invention.

[0077] In a specific implementation, the temperature control device 13 includes: a heating device 131 for heating the liquid in the sealed box 11; and a cooling device 132 for cooling the liquid in the sealed box 11. The heating device 131 can be an electric heater, such as an electric heating wire, which can be steplessly adjusted for heating, and the cooling device 132 can be an existing cooling device, which is not limited in the present embodiment.

[0078] Through the heating device 131 and the cooling device 132, the embodiment of the utility model can accurately control the temperature of the liquid in the closed box 11 during the heat exchange test, ensuring that the temperature of the liquid in the closed box 11 is constant, that is, ensuring that the closed box 11 can provide liquid with a constant temperature or a constant heat load.

[0079] In a specific implementation, when the device under test 14 is a CDU, if an enthalpy difference chamber is used to perform a heat exchange test on the primary side of the CDU, the refrigeration device 132 can reuse the water system of the enthalpy difference chamber, that is, the refrigeration device 132 can be provided with cooling by the water system of the enthalpy difference chamber that performs the heat exchange test on the primary side of the CDU.

[0080] Specifically, if Figure 2 As shown, when the device under test 14 is a CDU, if an enthalpy difference chamber is used to perform a heat exchange test on the primary side of the CDU, the refrigeration device 132 can reuse the water system 18 of the enthalpy difference chamber, that is, the refrigeration device 132 can be provided with cooling by the water system 18 of the enthalpy difference chamber that performs the heat exchange test on the primary side of the CDU.

[0081] In specific implementation, the water system 18 includes a water outlet 181 and a water inlet 182. The water outlet 181 and the water inlet 182 are connected through an external water circulation pipeline. Part of the water circulation pipeline is located in the closed box 11 and heat exchange is performed with the liquid in the closed box 11 through the heat exchange coil 19.

[0082] In actual applications, since the secondary side of the CDU usually uses deionized water, PG25 and other solutions, not only the cleanliness requirements are high, but also material compatibility needs to be considered. Therefore, the pipe material of the water system 18 of the enthalpy difference chamber cannot meet the requirements and it cannot directly contact the liquid in the closed box 11. Therefore, the heat exchange coil 19 is used to make the part of the water circulation pipeline located in the closed box 11 exchange heat with the liquid in the closed box 11.

[0083] It should be noted that Figure 2 In the heat exchange test system shown, the water system 18 of the enthalpy difference chamber, the external water circulation pipeline, and the heat exchange coil 19 together constitute the refrigeration equipment 132, and the water system 18 of the enthalpy difference chamber provides refrigeration.

[0084] See also Figure 2 The heat exchange system provided by the embodiment of the present invention also includes: a third temperature sensor 20, which is arranged in the third pipeline of the water circulation pipeline between the water outlet 181 of the water system 18 and the closed box 11; a fourth temperature sensor 21, which is arranged in the fourth pipeline of the water circulation pipeline between the water inlet 182 of the water system 18 and the closed box 11; and a second flow sensor 22, which is arranged in the third pipeline and / or the fourth pipeline.

[0085] By providing a third temperature sensor 20 in the third pipeline, a fourth temperature sensor 21 in the fourth pipeline, and a second flow sensor 22 in the third pipeline and / or the fourth pipeline, the measuring device 12 can obtain a second set of sampled values ​​and determine the heat exchange rate between the water system 18 and the sealed box 11 based on the second set of sampled values. The second set of sampled values ​​includes the sampled values ​​of the third temperature sensor 20, the sampled values ​​of the fourth temperature sensor 21, and the sampled values ​​of the second flow sensor 22. The specific method of determining the heat exchange rate based on the sampled values ​​in the second set of sampled values ​​is not limited in this embodiment of the utility model.

[0086] When implementing it specifically, Figure 3 As shown, the first pipeline includes a first branch 23 and a second branch 24 connected in parallel. The first branch 23 includes a first valve 231 connected to the liquid supply interface 111 and a water pump 232 connected to the device under test 14. The second branch 24 includes a second valve 241 connected between the liquid return interface 112 and the device under test 14.

[0087] In some embodiments, in order to prevent the backflow of liquid in the first branch 23, if the water pump 232 has the function of preventing the backflow of liquid, the one-way valve may not be provided in the first branch 23. If the water pump 232 does not have the function of preventing the backflow of liquid, then Figure 4 As shown, the first branch 23 further includes a one-way valve 233 connected between the water pump 232 and the device under test 14 .

[0088] When implementing it specifically, Figure 5 As shown, the heat exchange test system also includes: a liquid control line 25, which is used to replenish or discharge the liquid in the sealed box 11, one end of the liquid control line 25 is connected to the external container, and the other end is connected between the first valve 231 and the water pump 232, and a third valve 251 is provided in the liquid control line 25.

[0089] The heat exchange capacity testing system further includes a control device 26 for controlling the on / off states of the first valve 231, the second valve 241, and the third valve 251, the operating state of the water pump 232, and the heating power of the heating device 131, according to the system's operating mode. The first valve 231, the second valve 241, and the third valve 251 can all be electric valves, and the control device 26 can be a processor such as a CPU.

[0090] In practical applications, an expansion tank 27 may be further provided in the second pipeline to stabilize pressure changes in the system caused by temperature changes, thereby improving system stability.

[0091] See also Figure 5In some embodiments, the first pipeline and the second pipeline are respectively provided with pressure sensors (including a pressure sensor 271 provided in the first pipeline and a pressure sensor 272 provided in the second pipeline), and a temperature sensor 28 (also referred to as a fifth temperature sensor 28), a pressure sensor 29 and a liquid level sensor 30 are provided in the sealed box 11.

[0092] Among them, pressure sensors are respectively set in the first pipeline and the second pipeline to monitor the liquid pressure of the first pipeline and the second pipeline, and then determine whether the pressure meets the requirements of the secondary side of the CDU. By setting a temperature sensor 28, a pressure sensor 29 and a liquid level sensor 30 in the closed box 11, the temperature, pressure and liquid level in the closed box 11 can be monitored to facilitate the adjustment of the parameters of the liquid in the closed box 11.

[0093] In addition, in some embodiments, the sealed box 11 further includes an exhaust valve 31 for exhausting the air in the sealed box and a safety valve 32 for releasing the pressure in the sealed box.

[0094] By arranging an exhaust valve 31 and a safety valve 32 on the sealed box 11, the exhaust valve 31 can discharge excess air in the sealed box 11, and the safety valve 32 can automatically open to discharge the pressure in the sealed box 11 when the pressure in the sealed box 11 is higher than the pressure relief pressure of the safety valve 32, thereby protecting the sealed box 11.

[0095] The structure of the heat transfer test system provided by the embodiment of the present invention is described in detail above with reference to the accompanying drawings. Figure 5 The heat exchange rate testing system shown is used to explain in detail the working principle and operation mode of the heat exchange rate testing system provided by the embodiment of the present utility model.

[0096] by Figure 5 Taking the heat transfer test system shown in the figure as an example, the heat transfer test system provided by the embodiment of the present invention is generally introduced. Figure 5 As shown, the sealed box 11 is used to provide a liquid at a constant temperature or constant heat load. The water system 18 of the enthalpy difference chamber provides a cooling source for the liquid in the sealed box 11. The water in the enthalpy difference chamber water system 18 does not directly contact the liquid in the sealed box 11, and heat is exchanged through the heat exchange coil 19. The heating device 131 provides a heat source for the sealed box 11 with stepless adjustment. The sealed box 11 is equipped with an exhaust valve 31 and a safety valve 32, as well as a temperature sensor 28, a pressure sensor 29, and a liquid level sensor 30.

[0097] The first pipeline includes a first branch 23 and a second branch 24. The second branch 24 is a bypass branch of the first branch 23. A water pump 232 is provided in the first branch 23, which can be a variable frequency pump. Through the cooperation of the electric valve 231, the one-way valve 233, the electric valve 241, and the electric valve 251, not only can the closed box 11 be replenished and drained (liquid discharged), but the system operation mode can also be adjusted.

[0098] The first pipeline is equipped with a pressure sensor 271, a first temperature sensor 15, and a first flow sensor 17. The second pipeline is equipped with a pressure sensor 272 and a second temperature sensor 16. The third pipeline is equipped with a third temperature sensor 20 and a second flow sensor 22. The fourth pipeline is equipped with a fourth temperature sensor 21. The second pipeline is also equipped with an expansion tank 27 to stabilize pressure changes caused by temperature changes in the system.

[0099] The control device 26 is used to control the heating device 131, the water pump 232, the first valve 231, the second valve 241, and the third valve 251. The control device 26 controls the output percentage of the heating device 131 based on the real-time data measured by the measuring device 12, selects different control modes, and provides a constant heat load or a constant supply (return) temperature for the secondary side of the CDU.

[0100] The measuring device 12 is used for obtaining sampling values ​​of temperature sensors, pressure sensors, flow sensors, and liquid level sensors, and for outputting calculated data such as pressure difference, temperature difference, and heat exchange capacity, on the one hand.

[0101] Specifically, the measuring device 12 calculates the heat exchange amount Q on the secondary side of the CDU by obtaining the sampling values ​​of the first temperature sensor 15, the second temperature sensor 16 and the first flow sensor 17; calculates the constant heat exchange amount Q1 provided by the water system 18 of the enthalpy difference chamber to the closed box 11 by obtaining the sampling values ​​of the third temperature sensor 20, the fourth temperature sensor 21 and the second flow sensor 22; and calculates the secondary side resistance of the CDU by obtaining the sampling values ​​of the pressure sensor 271 and the pressure sensor 272.

[0102] In addition, the embodiment of the present invention sets two layers of safety protection for the closed box 11. The first layer of safety protection is software protection. When any of the high alarms of the temperature sensor 28, the high alarm of the pressure sensor 29, and the low alarm of the liquid level sensor 30 of the closed box 11 is triggered, the control device automatically shuts down the heating device 131 to prevent dry burning, overheating, and overpressure. The second layer of safety protection is physical protection. When the pressure in the closed box 11 is higher than the pressure relief pressure of the safety valve 32, the safety valve opens to release part of the pressure.

[0103] The heat exchange rate testing system provided by the embodiment of the present invention can have at least the following operating modes. The specific operating mode can be selected by the user according to actual conditions. When performing a specific heat exchange rate test, after the user selects the system operating mode, the control device 26 in the system can control the status of the heating device 131, the water pump 232, the first valve 231, the second valve 241, and the third valve 251, so that the system operates in the operating mode selected by the user.

[0104] The following takes the device under test as a CDU or a cold plate liquid cooling server as an example, and combines the working status of each component to illustrate the operating mode of the heat exchange test system provided by the embodiment of the present invention.

[0105] Mode 1: Bypass Operation Mode. This mode is a test mode in which the device under test provides the liquid circulation power. The control device 26 closes the first valve 231 and the third valve 251 and opens the second valve 241. The coolant pump inside the CDU 14 provides the liquid circulation power.

[0106] Mode 2, power operation mode, is a test mode in which the system provides liquid circulation power. The control device 26 closes the second valve 241 and the third valve 251, opens the first valve 231, and the water pump 232 provides liquid circulation power.

[0107] In this mode, the device under test can also be a cold plate liquid cooling server, that is, this mode can be used to test the heat exchange capacity of the cold plate liquid cooling server.

[0108] Mode 3: Constant Heat Load Mode. This mode provides a constant heat load for the CDU 14. The required heat load Q2 is input to the CDU 14, and the control device 26 controls the heating power (or output power) of the heating device 131 to maintain a constant heat load Q3, where Q3 = Q2 + Q1, where Q1 is the system cooling capacity, or the constant heat exchange provided by the enthalpy difference chamber water system 18 to the sealed enclosure 11. In this mode, the heat exchange capacity Q on the secondary side of the CDU 14 is constant. If heat leakage is ignored, Q equals the constant heat load Q2.

[0109] Mode 4, constant temperature heating mode, is a constant temperature heating mode that provides a constant temperature liquid to the device under test. This mode can provide a constant supply liquid (return liquid) temperature for the CDU14 and input the required temperature value for the CDU14. The control device 26 comprehensively calculates and controls the heating power (or output electrical power) of the heating device 131 based on the supply liquid temperature (the liquid temperature value in the first pipeline, i.e., the sampling value of the first temperature sensor 15), the return liquid temperature (the liquid temperature value in the second pipeline, i.e., the sampling value of the second temperature sensor 16), and the liquid temperature in the sealed box 11 (the sampling value of the temperature sensor 28) obtained in real time by the measuring device 12, so that the heating amount provided by the heating device 131 is Q3, and Q3 is greater than Q1, thereby keeping the supply liquid (return liquid) temperature unchanged.

[0110] Specifically, the heating power of the heating device 131 is calculated comprehensively based on the liquid supply temperature, the liquid return temperature, and the liquid temperature in the sealed box 11. The existing method can be used, and the embodiment of the present invention does not limit this.

[0111] Mode 5, constant temperature cooling mode, this mode is a constant temperature cooling mode that provides a constant temperature liquid to the device under test. This mode can provide a constant supply liquid (return liquid) temperature for the cold plate liquid cooling server, and the required temperature value is input. The control device 26 comprehensively calculates and controls the heating power (or output electric power) of the heating device 131 based on the supply liquid temperature (the liquid temperature value in the first pipeline, that is, the sampling value of the first temperature sensor 15), the return liquid temperature (the liquid temperature value in the second pipeline, that is, the sampling value of the second temperature sensor 16), and the liquid temperature in the closed box 11 (the sampling value of the temperature sensor 28) obtained in real time by the measuring device 12, so that the heating amount provided by it is Q3, and Q3 is less than Q1, thereby keeping the supply liquid (return liquid) temperature unchanged.

[0112] Specifically, the heating power of the heating device 131 is calculated comprehensively based on the liquid supply temperature, the liquid return temperature, and the liquid temperature in the sealed box 11. The existing method can be used, and the embodiment of the present invention does not limit this.

[0113] Mode 6, refill mode. Control device 26 opens third valve 251, closes first valve 231 and second valve 241, and water pump 232 automatically operates until the system reaches the set pressure, completing refill. During this period, exhaust valve 31 automatically exhausts system air (from within sealed enclosure 11). If the device under test is a CDU and the CDU's coolant pump is used for refill, water pump 232 may not operate.

[0114] Mode 7: Draining mode: The control device 26 opens the first valve 231, the second valve 241, and the third valve 251. Since the liquid control line 25 is at the lowest point, the system drains by gravity until it is empty.

[0115] Based on the same concept, the embodiment of the present invention also provides a heat exchange testing device. The principle of solving the problem by the device is similar to the principle of solving the problem by the above method. The implementation of the device can refer to the implementation of the method, and the repeated parts will not be repeated.

[0116] The present invention provides a heat transfer test device for testing the heat transfer of a CDU. Figure 6 As shown, the test equipment includes: a heat exchange capacity test system 61 and an enthalpy difference chamber test system 62 provided in an embodiment of the present utility model.

[0117] The enthalpy difference chamber test system 61 is used to test the heat exchange rate on the primary side of the CDU; the heat exchange rate test system 62 is used to test the heat exchange rate on the secondary side of the CDU.

[0118] The refrigeration equipment in the heat exchange test system 62 can be cooled by the water system in the enthalpy difference chamber test system 61 .

[0119] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A heat exchange capacity testing system, characterized in that: The system includes: a sealed box, a measuring device, and a temperature control device arranged in the sealed box, wherein: The sealed box is filled with liquid, and the sealed box includes a liquid supply interface and a liquid return interface. The liquid supply interface is connected to the device under test through a first pipeline, and the liquid return interface is connected to the device under test through a second pipeline. When the heat exchange capacity test is performed on the device under test, the liquid in the sealed box flows to the device under test through the first pipeline and flows back to the sealed box through the second pipeline. The first pipeline is provided with a first temperature sensor, the second pipeline is provided with a second temperature sensor, and the first pipeline and / or the second pipeline are provided with a first flow sensor; The temperature regulating device is used to regulate the temperature of the liquid in the sealed box during the heat exchange test to keep the temperature of the liquid constant; The measuring device is used to obtain a first sampling value set and determine the heat exchange capacity of the device under test based on the first sampling value set, wherein the first sampling value set includes the sampling values ​​of the first temperature sensor, the sampling values ​​of the second temperature sensor and the sampling values ​​of the first flow sensor.

2. The system according to claim 1, wherein: The temperature control device comprises: A heating device for heating the liquid in the sealed box; Refrigeration equipment is used to provide refrigeration for the liquid in the closed box.

3. The system according to claim 2, characterized in that The device under test is a cooling distribution unit (CDU), and the cooling device is cooled by a water system in an enthalpy difference chamber that performs a heat exchange test on the primary side of the CDU.

4. The system according to claim 3, characterized in that The water system includes a water outlet and a water inlet, the water outlet and the water inlet are connected via an external water circulation pipeline, part of the water circulation pipeline is located in the closed box, and heat exchange is performed with the liquid in the closed box via a heat exchange coil.

5. The system according to claim 4, characterized in that The system further comprises: a third temperature sensor, provided in the third pipe of the water circulation pipe between the water outlet of the water system and the closed box; a fourth temperature sensor, provided in a fourth pipe of the water circulation pipe between the water inlet of the water system and the closed box; a second flow sensor, disposed in the third pipeline and / or the fourth pipeline; The measuring device is also used to obtain a second set of sampling values ​​and determine the heat exchange between the water system and the closed box based on the second set of sampling values, the second set of sampling values ​​including the sampling values ​​of the third temperature sensor, the sampling values ​​of the fourth temperature sensor and the sampling values ​​of the second flow sensor.

6. The system according to any one of claims 2 to 5, characterized in that The first pipeline includes a first branch and a second branch connected in parallel, the first branch includes a first valve connected to the liquid supply interface and a water pump connected to the device under test, and the second branch includes a second valve connected between the liquid return interface and the device under test.

7. The system according to claim 6, characterized in that The first branch also includes a one-way valve connected between the water pump and the device under test.

8. The system according to claim 6, wherein: The system also includes: a liquid control pipeline for replenishing or draining the liquid in the closed box, one end of the liquid control pipeline is connected to an external container, and the other end is connected between the first valve and the water pump, and a third valve is provided in the liquid control pipeline.

9. The system according to claim 8, characterized in that The system also includes: a control device for controlling the switching states of the first valve, the second valve, and the third valve, controlling the working state of the water pump, and controlling the heating power of the heating device according to the operating mode of the system.

10. The system according to claim 9, characterized in that The control device is specifically configured to perform one or more of the following operations: When it is determined that the operating mode of the system is a test mode in which the liquid circulation power is provided by the device under test, controlling the closing of the first valve and the third valve and opening the second valve; When it is determined that the operating mode of the system is a test mode in which the system provides liquid circulation power, controlling the closing of the second valve and the third valve, and opening the first valve and the water pump; When it is determined that the operating mode of the system is an operating mode of providing a constant heat load liquid to the device under test, controlling the heating power of the heating device so that the heat provided by the heating device is equal to the sum of the system cooling capacity and the constant heat load, the system cooling capacity being the heat exchange between the cooling device and the closed box; When it is determined that the operating mode of the system is a constant temperature heating mode for providing a liquid at a constant temperature to the device under test, controlling the heating power of the heating device based on the liquid temperature in the first pipe, the liquid temperature in the second pipe, and the liquid temperature in the sealed box obtained by the measuring device so that the heat provided by the heating device is greater than the cooling capacity of the system, so that the temperature of the liquid in the sealed box is kept constant; When it is determined that the operating mode of the system is a constant temperature cooling mode for providing a liquid at a constant temperature to the device under test, controlling the heating power of the heating device based on the liquid temperature in the first pipe, the liquid temperature in the second pipe, and the liquid temperature in the closed box obtained by the measuring device so that the heat provided by the heating device is less than the cooling capacity of the system, so that the temperature of the liquid in the closed box is kept constant; When it is determined that the operating mode of the system is a liquid replenishing mode for replenishing liquid into the closed box, controlling to open the third valve and the water pump, and closing the first valve and the second valve; When it is determined that the operating mode of the system is a liquid discharge mode for discharging the liquid in the closed box, the first valve, the second valve and the third valve are controlled to open.

11. The system according to any one of claims 1 to 5, characterized in that An expansion tank is provided in the second pipeline.

12. The system according to any one of claims 1 to 5, characterized in that The first pipeline and the second pipeline are respectively provided with a pressure sensor, and the sealed box is provided with a temperature sensor, a pressure sensor and a liquid level sensor.

13. The system according to any one of claims 1 to 5, characterized in that The sealed box further includes an exhaust valve for discharging air from the sealed box and a safety valve for releasing pressure from the sealed box.

14. A heat exchange capacity test device for testing the heat exchange capacity of a cooling distribution unit (CDU), characterized in that: The testing equipment comprises: a heat transfer test system and an enthalpy difference chamber test system according to any one of claims 1 to 13; The enthalpy difference chamber test system is used to test the heat exchange capacity of the primary side of the CDU; The heat exchange capacity testing system is used to perform heat exchange capacity testing on the secondary side of the CDU.

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