Two-phase immersion adsorption type cooling system of data center

Abstract

The invention discloses a two-phase immersion adsorption type cooling system for a data center, and the system comprises a cabinet which is connected with an adsorption refrigeration module, a sensor module, and a controller module; a blade server is arranged in the cabinet, and a tubular heat exchanger is arranged above the blade server; the adsorption refrigeration module is connected with the tubular heat exchanger and used for achieving refrigeration circulation. The sensing module and the control module are matched to control the operation of the system; an adsorption type refrigeration technology is combined with a data center immersion type cooling technology, server heat dissipation serves as driving force for driving the data center to be cooled, waste heat resources of the data center are fully utilized, and the operation cost of the data center is reduced; a two-stage cooling mode is adopted for circulating water in a tubular heat exchanger, firstly, heat is released in an adsorption chamber for desorption of a working medium; and then the waste heat flows through the evaporation chamber and is further cooled by a condensation working medium from the condensation chamber, and the heat transfer temperature difference is reduced in two-stage cooling, so that the utilization efficiency of waste heat resources is improved.

Description

Technical Field

[0001] This invention relates to the field of data center cooling technology, and in particular to a two-phase immersion adsorption cooling system for data centers. Background Technology

[0002] With the rapid development of artificial intelligence technology, the computing load of data centers has increased dramatically, forcing them to move towards higher integration. However, this brings with it the challenge of cooling high power consumption and high heat flux. Traditional air cooling technology becomes drastically less efficient when dealing with high-density servers, with energy consumption accounting for 30%-40% of the total power consumption of a data center, becoming a major obstacle to PUE (Power Usage Effectiveness) optimization. With the explosive growth of chip power consumption, air cooling can no longer meet the heat dissipation requirements. Immersion cooling technology, as a new generation of cooling method, can significantly improve heat dissipation efficiency and reduce PUE by directly immersing electronic components or the entire server in a coolant with high thermal conductivity and strong electrical insulation. It is considered one of the important solutions for energy saving and carbon reduction in data centers.

[0003] In particular, two-phase immersion cooling technology can make full use of the latent heat of phase change, and its heat transfer coefficient is much higher than that of single-phase immersion cooling without phase change, which can easily meet the heat dissipation requirements of artificial intelligence computing in data centers. However, existing methods for condensing gaseous coolant in two-phase immersion cooling mostly rely on external energy to drive the cooling equipment to meet the heat exchange requirements. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is that: currently, two-phase immersion cooling requires external energy to drive the cooling equipment to meet the heat exchange requirements.

[0005] The above-mentioned technical problems are solved by the following technical solution: This invention proposes a two-phase immersion adsorption cooling system for data centers, comprising, The cabinet connects the adsorption-cooling module, sensor module, and controller module. The cabinet is equipped with blade servers, and a tubular heat exchanger is installed above the blade servers. The adsorption refrigeration module is connected to the tubular heat exchanger to realize the refrigeration cycle; the sensing module and control module work together to control the operation of the system.

[0006] In a preferred embodiment of the two-phase immersion adsorption cooling system for data centers described in this invention: the fluorinated liquid in the cabinet absorbs the heat generated by the blade server and then boils and evaporates to produce steam. The outside of the tubular heat exchanger contacts the fluorinated liquid vapor for heat exchange, and the inside of the tubular heat exchanger is circulating water. After absorbing heat, the circulating water enters the adsorption cooling module.

[0007] In a preferred embodiment of the two-phase immersion adsorption cooling system for data centers described in this invention: the adsorption cooling module consists of four chambers: a first adsorption chamber, a second adsorption chamber, a condensation chamber, and an evaporation chamber; the first adsorption chamber and the second adsorption chamber are symmetrically arranged; the condensation chamber is located at the upper end of the first adsorption chamber and the second adsorption chamber, and the evaporation chamber is located at the lower end of the first adsorption chamber and the second adsorption chamber.

[0008] In a preferred embodiment of the two-phase immersion adsorption cooling system for data centers described in this invention: the upper ends of the first adsorption chamber and the second adsorption chamber are connected to the condensation chamber for continuous condensation of the circulating working fluid for adsorption cooling; the lower ends of the first adsorption chamber and the second adsorption chamber are connected to the evaporation chamber for continuous cooling of the circulating water.

[0009] In a preferred embodiment of the two-phase immersion adsorption cooling system for data centers described in this invention: a first adsorption chamber is provided with a first adsorption bed, and a second adsorption chamber is provided with a second adsorption bed, both the first adsorption bed and the second adsorption bed being provided with serpentine coils.

[0010] In a preferred embodiment of the two-phase immersion adsorption cooling system for data centers described in this invention: the tubular heat exchanger is connected to the serpentine coils in the first adsorption bed and the second adsorption bed via a circulating pump and multiple sets of three-way solenoid valves, respectively.

[0011] In a preferred embodiment of the two-phase immersion adsorption cooling system for data centers described in this invention: the tubular heat exchanger is connected to a serpentine coil for heating or cooling the first adsorption bed or the second adsorption bed, wherein the first adsorption bed and the second adsorption bed are used for adsorbing and desorbing the circulating working fluid.

[0012] In a preferred embodiment of the two-phase immersion adsorption cooling system for data centers described in this invention: the condensation chamber includes a condenser, and a liquid collection tank is provided below the condenser. The condenser is used to condense the gaseous working fluid from the adsorption chamber. The liquid collection tank of the condensation chamber is connected to the evaporation chamber through a liquid guide pipe, and an evaporator is provided in the evaporation chamber.

[0013] In a preferred embodiment of the two-phase immersion adsorption cooling system for data centers described in this invention: a first electromagnetic valve is provided at the upper end of the first adsorption chamber, a second electromagnetic valve is provided at the upper end of the second adsorption chamber, a third electromagnetic valve is provided between the evaporation chamber and the first adsorption chamber, and a fourth electromagnetic valve is provided between the evaporation chamber and the second adsorption chamber.

[0014] In a preferred embodiment of the two-phase immersion adsorption cooling system for data centers described in this invention: the sensing module is used to acquire the adsorption state of the adsorption bed and the cabinet temperature, and the control module is used to continuously control the opening and closing of each valve to realize the continuous switching of heating or cooling between the first adsorption bed and the second adsorption bed.

[0015] The beneficial effects of this invention are: by combining adsorption refrigeration technology with data center immersion cooling technology, and using server heat dissipation as the driving force for data center cooling, the waste heat resources of the data center are fully utilized, thereby reducing data center energy consumption and reducing data center operating costs. A two-stage cooling method is adopted for the circulating water in the tubular heat exchanger. First, heat is released in the adsorption chamber for the desorption of the working fluid. Then, it flows through the evaporation chamber and is further cooled by the condensation working fluid from the condensation chamber. The heat transfer temperature difference is reduced in the two-stage cooling, thereby improving the utilization efficiency of waste heat resources. The adsorption bed and circulating working fluid in the adsorption refrigeration module can be determined according to the actual heat dissipation requirements, realizing flexible selection of the adsorption bed and circulating working fluid in the adsorption refrigeration module according to the usage requirements, improving the matching between heat dissipation requirements and adsorption refrigeration module, optimizing system structure design, and reducing equipment size. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Wherein: Figure 1 A schematic diagram of the structure of the present invention is shown; Figure 2 A schematic diagram of the adsorption refrigeration module in this invention is shown. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0018] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0019] Reference Figure 1 This embodiment provides a two-phase immersion adsorption cooling system for a data center, including: Cabinet 1 connects to adsorption-cooling module 2, sensor module and controller module; The rack 1 contains a blade server 11, and a tubular heat exchanger 12 is installed above the blade server 11. The adsorption refrigeration module 2 is connected to the tubular heat exchanger 12 to realize the refrigeration cycle; the sensing module and control module work together to control the operation of the system. The cabinet 1 is a sealed structure filled with fluorinated liquid, which completely submerges the built-in blade server 11. A tubular heat exchanger 12 is fixedly installed on the upper part of the inner side wall of the cabinet 1. The adsorption refrigeration module 2 is connected to the tubular heat exchanger 12 through a circulation pipeline to receive the heat transferred by the tubular heat exchanger 12 and complete the refrigeration cycle. The sensing module can detect data at various locations in the system. The control module is a PLC controller with a data processing unit, which is connected to the sensing module, the adsorption refrigeration module 2 and the actuators in the cabinet 1 through signals to receive sensing data and output control commands to realize the automated operation of the system.

[0020] Furthermore, the fluorinated liquid inside the rack 1 absorbs the heat generated by the blade server 11 and then boils and evaporates to produce steam. The outside of the tubular heat exchanger 12 comes into contact with the fluorinated liquid vapor for heat exchange, and the inside of the tubular heat exchanger 12 is circulating water. After absorbing heat, the circulating water enters the adsorption refrigeration module 2. When the blade server 11 generates heat during operation, the heat is transferred to the surrounding fluorinated liquid, causing the fluorinated liquid to reach its boiling point and boil and evaporate to produce fluorinated liquid vapor. The shell of the tubular heat exchanger 12 is connected to the internal space of the cabinet 1. The fluorinated liquid vapor contacts the outer wall of the heat exchange tube of the tubular heat exchanger 12 and transfers heat to the circulating water flowing inside the heat exchange tube. After absorbing heat, the temperature of the circulating water rises and is transported to the adsorption cooling module 2 through the circulation pipeline, completing the initial transfer of heat in the cabinet 1.

[0021] Furthermore, the adsorption refrigeration module 2 consists of four chambers: a first adsorption chamber 21, a second adsorption chamber 22, a condensation chamber 23, and an evaporation chamber 24. The first adsorption chamber 21 and the second adsorption chamber 22 are symmetrically arranged. The condensation chamber 23 is located at the upper end of the first adsorption chamber 21 and the second adsorption chamber 22, and the evaporation chamber 24 is located at the lower end of the first adsorption chamber 21 and the second adsorption chamber 22. The adsorption refrigeration module 2 is a rectangular closed cavity structure, internally divided into four independent chambers: a first adsorption chamber 21, a second adsorption chamber 22, a condensation chamber 23, and an evaporation chamber 24. The first adsorption chamber 21 and the second adsorption chamber 22 are symmetrically arranged about the vertical center line of the adsorption refrigeration module 2, and their structures are completely identical, both located on the left and right sides of the adsorption refrigeration module 2. The condensation chamber 23 is located in the upper region of the adsorption refrigeration module 2, and the evaporation chamber 24 is located in the lower region of the adsorption refrigeration module 2, ensuring that the liquid working fluid can fully cover the evaporator 241.

[0022] Furthermore, the upper ends of the first adsorption chamber 21 and the second adsorption chamber 22 are connected to the condensation chamber 23 for continuous condensation of the circulating working fluid in the adsorption refrigeration, and the lower ends of the first adsorption chamber 21 and the second adsorption chamber 22 are connected to the evaporation chamber 24 for continuous cooling of the circulating water. When the adsorption bed inside the first adsorption chamber 21 or the second adsorption chamber 22 is heated and desorbed, the generated gaseous circulating working fluid enters the condensation chamber 23 through the corresponding conveying pipeline to achieve continuous condensation of the circulating working fluid; the circulating water in the first adsorption chamber 21 or the second adsorption chamber 22 enters the evaporation chamber 24 through the corresponding conveying pipeline to exchange heat with the low-temperature working fluid in the evaporation chamber 24 to achieve continuous cooling of the circulating water.

[0023] Furthermore, the first adsorption chamber 21 is provided with a first adsorption bed 211, and the second adsorption chamber 22 is provided with a second adsorption bed 221. Both the first adsorption bed 211 and the second adsorption bed 221 are provided with serpentine coils. The adsorption bed is used for the adsorption and desorption of the circulating working fluid; a first serpentine coil is installed through the interior of the first adsorption bed 211, and the inlet and outlet of the first serpentine coil protrude through the side wall of the first adsorption chamber 21, and the protrusion positions are sealed with sealing sleeves; a second serpentine coil is installed through the interior of the second adsorption bed 221, and the structure of the second serpentine coil is the same as that of the first serpentine coil, and the inlet and outlet of the second adsorption chamber 22 are also protruding through the side wall and sealed.

[0024] Furthermore, the tubular heat exchanger 12 is connected to the serpentine coils in the first adsorption bed 211 and the second adsorption bed 221 via the circulating pump 13 and multiple sets of three-way solenoid valves, respectively. The tubular heat exchanger 12, connected to the serpentine coil, can be used to heat or cool the adsorption bed. The outlet of the tubular heat exchanger 12 is connected to the inlet of the circulating pump 13 via the main circulation pipeline. The speed of the circulating pump 13 can be adjusted according to system requirements. The outlet of the circulating pump 13 is connected to the inlet of the three-way solenoid valve. The two outlets of the three-way solenoid valve are connected to branch one and branch two, respectively. Branch one is connected to the inlet of the first serpentine coil via the three-way solenoid valve, and the outlet of the first serpentine coil is connected to the return water pipeline. Branch two is connected to the inlet of the second serpentine coil via the three-way solenoid valve, and the outlet of the second serpentine coil is also connected to the return water pipeline. The return water pipeline is finally connected to the inlet of the tubular heat exchanger 12, forming a complete circulating water loop. All three-way solenoid valves are electromagnetically controlled three-way valves to ensure timely pipeline switching.

[0025] Furthermore, the tubular heat exchanger 12 is connected to the serpentine coil for heating or cooling the first adsorption bed 211 or the second adsorption bed 221, which are used to adsorb and desorb the circulating working fluid. The tubular heat exchanger 12 is connected to the first and second serpentine coils via a circulating water loop. When the circulating water is high-temperature water output from the tubular heat exchanger 12, the high-temperature water flows into the first or second serpentine coil and transfers heat to the corresponding adsorption bed through the tube wall, raising the temperature of the adsorption bed to 40-50℃, which causes the circulating working fluid adsorbed by the molecular sieve in the adsorption bed to desorb. When the circulating water loop is switched to supply water to the cooling tower, low-temperature water flows into the first or second serpentine coil, absorbs the heat of the adsorption bed, and causes the molecular sieve to re-adsorb the gaseous circulating working fluid. The first adsorption bed 211 and the second adsorption bed 221 continuously provide circulating power to the adsorption refrigeration module 2 through alternating adsorption and desorption processes, ensuring uninterrupted refrigeration cycle.

[0026] Furthermore, the condensing chamber 23 includes a condenser 231, and a liquid collection tank 232 is provided below the condenser 231. The condenser 231 is used to condense the gaseous working fluid from the adsorption chamber. The liquid collection tank 232 of the condensing chamber 23 is connected to the evaporation chamber 24 through a liquid guide pipe. The evaporation chamber 24 is provided with an evaporator 241. A condenser 231 is horizontally installed inside the condensing chamber 23. The condenser 231 is a shell-and-tube heat exchanger 12 with copper heat exchange tubes and fins on the outside of the tubes to increase the condensation area. The inlet and outlet of the condenser 231 extend through the side wall of the condensing chamber 23 and are connected to an external cooling water source to ensure that the gaseous working fluid can be condensed on the surface of the condenser 231. A liquid collection tank 232 is located directly below the condenser 231. The liquid collection tank 232 is an open container with a liquid guide port at the bottom. The liquid guide port is connected to the top of the evaporation chamber 24 through a liquid guide pipe. The evaporator 241 is a plate heat exchanger. The liquid working fluid transported by the liquid pipe is sprayed onto the heat exchange plates of the evaporator 241, absorbs heat from the plates and evaporates, and at the same time reduces the plate temperature, which further reduces the temperature of the circulating water flowing through the evaporator 241.

[0027] Furthermore, a first electromagnetic valve 212 is provided at the upper end of the first adsorption chamber 21, a second electromagnetic valve 222 is provided at the upper end of the second adsorption chamber 22, a third electromagnetic valve 242 is provided between the evaporation chamber 24 and the first adsorption chamber 21, and a fourth electromagnetic valve 243 is provided between the evaporation chamber 24 and the second adsorption chamber 22. A first solenoid valve 212 is installed on the first conveying pipeline at the upper end of the first adsorption chamber 21, and a second solenoid valve 222 is installed on the second conveying pipeline at the upper end of the second adsorption chamber 22; this prevents the gaseous working medium in the evaporation chamber 24 from entering the first adsorption chamber 21; when the first adsorption bed 211 adsorbs, the first solenoid valve 212 is closed and the third solenoid valve 242 is opened, allowing the gaseous working medium in the evaporation chamber 24 to enter the first adsorption chamber 21, while preventing the backflow of the desorbed gaseous working medium; ensuring precise switching of chamber on / off states; When the first adsorption chamber 21 has completed desorption, the upper and lower valves of the two adsorption chambers are controlled to exchange the functions of the two adsorption chambers to achieve continuous cooling. The flow rate of the heat exchange pipe of the tubular heat exchanger 12 is controlled according to the temperature of the cabinet 1 so that the temperature inside the cabinet 1 reaches the set temperature. The valves are opened and closed according to the adsorption state of the adsorption bed, and the functions of the two adsorption chambers are switched. If the first adsorption bed 211 in the first adsorption chamber 21 is saturated, when the first adsorption bed 211 desorbs, the first solenoid valve 212 opens and the third solenoid valve 242 closes, and the gaseous working fluid enters the condensation chamber 23. At this time, the tubular heat exchanger 12 is connected to the first adsorption chamber 21, heating the adsorption bed in the first adsorption chamber 21, causing the working fluid to desorb and generate gas. By controlling and adjusting the three-way solenoid valve, the cooling tower water supply enters the serpentine coil in the second adsorption bed 221 to cool the second adsorption bed 221 in the second adsorption chamber 22; then, by controlling and adjusting the three-way solenoid valve, the serpentine coil in the second adsorption bed 221 is connected to the evaporator 241; after the cooling tower water supply enters the evaporator 241, it condenses the gaseous circulating working fluid from the first adsorption chamber 21. The circulating working fluid in the evaporation chamber 24 evaporates into a gaseous state and enters the second adsorption chamber 22 through the opened fourth solenoid valve 243. At this time, the second adsorption bed 221 in the second adsorption chamber 22 is cooled by the water supplied by the cooling tower and adsorbs the gaseous circulating working fluid that enters the second adsorption chamber 22. At this time, the second adsorption chamber 22 is connected to the cooling tower for adsorbing the working fluid. Electromagnetic control valves are provided on both the upper and lower sides of the first adsorption chamber 21 and the second adsorption chamber 22 to balance the gas pressure in each chamber. The electromagnetic control valves are opened alternately during the adsorption refrigeration cycle to regulate the adsorption and desorption of the gas by the adsorption bed.

[0028] Furthermore, the sensing module is used to acquire the adsorption state of the adsorption bed and the temperature of the cabinet 1, and the control module is used to continuously control the opening and closing of each valve to realize the continuous switching of heating or cooling between the first adsorption bed 211 and the second adsorption bed 221. The sensing module has a temperature sensor that can collect the temperature of the fluorinated liquid in the cabinet 1, the circulating water temperature of the tubular heat exchanger 12, and the adsorption bed temperature in real time, and convert the temperature data into an electrical signal to be transmitted to the control module; the adsorption status sensor is a pressure sensor installed inside the first and second adsorption chambers 22, which determines whether the adsorption bed is saturated or completely desorbed by detecting changes in the air pressure in the chamber; the PLC controller of the control module has a built-in control program that can output pulse signals to control the opening and closing of each solenoid valve and the three-way solenoid valve, as well as the speed of the circulating pump 13, based on the data transmitted by the sensing module.

[0029] The sensing module acquires the adsorption state of the adsorption bed and the temperature of cabinet 1; When the first adsorption bed 211 is completely desorbed and the second adsorption bed 221 is saturated with adsorption, the first solenoid valve 212 and the fourth solenoid valve 243 are closed, and the second solenoid valve 222 and the third solenoid valve 242 are opened. The control and regulation of the solenoid three-way valve connects the tubular heat exchanger 123 and the serpentine coil in the second adsorption bed 2217. The second adsorption bed 221 is heated by the heated circulating water, and the circulating working fluid adsorbed in the second adsorption bed 221 is gradually desorbed and enters the condensation chamber 23 through the opened second solenoid valve 222. After being condensed by the condenser 231, it enters the collection tank 232. The low-temperature circulating working fluid in the collection tank 232 is then sprayed onto the evaporator 241 in the evaporation chamber 24 through the liquid guide pipe for further condensation of the circulating water from the serpentine coil in the second adsorption bed 221. At this time, the control and regulation of the three-way solenoid valve connects the serpentine coil in the second adsorption bed 221 and the evaporator 241. The control and regulation of the three-way solenoid valve 8 connects the evaporator 241 and the tubular heat exchanger 12, so that the condensed circulating water enters the tubular heat exchanger 12 to condense the gaseous fluorinated liquid in the cabinet 1. The circulating working fluid in the evaporation chamber 24 evaporates into a gaseous state and enters the first adsorption chamber 21 through the opened third solenoid valve 242; at this time, the adsorption bed in the first adsorption chamber 21 is cooled by the water supplied by the cooling tower and adsorbs the gaseous circulating working fluid that enters the first adsorption chamber 21. Specifically, by controlling and adjusting the three-way solenoid valve 22, cooling tower water is supplied to the serpentine coil in the first adsorption bed 211 to cool the first adsorption bed 211 in the first adsorption chamber 21; then, the three-way solenoid valve is controlled and adjusted to connect the serpentine coil in the first adsorption bed 211 and the evaporator 24113; after the cooling tower water enters the evaporator 241, it condenses the gaseous circulating working fluid from the second adsorption chamber 22.

[0030] When the second adsorption bed 221 is completely desorbed and the first adsorption bed 211 is saturated with adsorption, the functions of the two adsorption chambers are exchanged. At this time, the control adjusts the second solenoid valve 222 and the third solenoid valve 242 to close, and the first solenoid valve 212 and the fourth solenoid valve 243 to open. When the first adsorption bed 211 in the first adsorption chamber 21 is heated by circulating water from the tubular heat exchanger 12, the circulating working fluid adsorbed in the first adsorption bed 211 gradually desorbs and enters the condensing chamber 23 through the opened first solenoid valve 212. After being condensed by the condenser 231, it enters the collection tank 232. The low-temperature circulating working fluid in the collection tank 232 is then sprayed onto the evaporator 241 in the evaporation chamber 24 through the liquid guide pipe for further condensation of the circulating water from the serpentine coil in the first adsorption bed 211. At this time, the control and regulating three-way solenoid valve connects the serpentine coil in the first adsorption bed 211 and the evaporator 241. The control and regulating three-way solenoid valve connects the evaporator 241 and the tubular heat exchanger 12, so that the condensed circulating water enters the tubular heat exchanger 12 to condense the gaseous fluorinated liquid in the cabinet 1. The circulating working fluid in the evaporation chamber 24 evaporates into a gaseous state and enters the second adsorption chamber 22 through the opened fourth solenoid valve 243; at this time, the second adsorption bed 221 in the second adsorption chamber 22 is cooled by the water supplied by the cooling tower and adsorbs the gaseous circulating working fluid that enters the second adsorption chamber 22. By controlling and adjusting the three-way solenoid valve, the cooling tower water supply enters the serpentine coil in the second adsorption bed 2217 to cool the second adsorption bed 221 in the second adsorption chamber; then, the three-way solenoid valve is controlled and adjusted to connect the serpentine coil in the second adsorption bed 221 and the evaporator 241; after the cooling tower water supply enters the evaporator 241, it condenses the gaseous circulating working fluid from the first adsorption chamber 21. The valves are opened and closed according to the adsorption state of the adsorption bed to switch the functions of the two adsorption chambers. If the adsorption bed in the first adsorption chamber 21 is saturated, the tubular heat exchanger 12 is connected to the first adsorption chamber 21 to heat the adsorption bed in the first adsorption chamber 21, causing the working fluid to desorb and generate gas. At this time, the second adsorption chamber 22 is connected to the cooling tower to adsorb the working fluid. When the first adsorption chamber 21 has completed desorption, the upper and lower valves of the two adsorption chambers are controlled to exchange the functions of the two adsorption chambers to achieve continuous cooling. The flow rate of the heat exchange pipe of the tubular heat exchanger 12 is controlled according to the temperature of the cabinet 1 so that the temperature inside the cabinet 1 reaches the set temperature.

[0031] In one embodiment of the present invention, a silica gel-water working medium is selected as the heat exchange medium of the adsorption refrigeration module 212.

[0032] The refrigeration cycle mainly consists of four components: a first adsorption chamber 21, a second adsorption chamber 22, an evaporator 241, and a condenser 231. Through simplified analysis of the energy balance equation, the following mathematical model can be established: Energy balance equation for the adsorption chamber: In the formula, Ma is the mass of silica gel in kg; ca is the specific heat capacity of silica gel in kJ / (kg·K); cp,w is the specific heat capacity of liquid working fluid water in kJ / (kg·K); cwv is the specific heat capacity of gaseous working fluid water in kJ / (kg·K); ccu is the specific heat capacity of heat exchanger copper tubes in kJ / (kg·K); cal is the specific heat capacity of heat exchanger fin material in kJ / (kg·K); Mt,ad is the mass of heat exchanger heat transfer tubes in kg; Mfin,ad is the mass of heat exchanger fins in kg; qst is the isobaric adsorption / desorption heat in kJ / kg; Te is the evaporator temperature in K; Tad,in and Tad,out are the inlet and outlet water temperatures of the adsorption bed in K, respectively; and mw is the flow rate of the heat source in m³ / h.

[0033] Energy balance equation for condenser 231: In the formula, Mc is the mass of the metal material used in condenser 231, in kg; Tc is the condensation temperature of the system, in K; L is the latent heat of vaporization of water, in kJ / kg; Tcool,in and Tcool,out are the inlet and outlet water temperatures of condenser 231, respectively, in K; and mcool is the flow rate of cooling water in condenser 231, in m3 / h.

[0034] Energy balance equation for evaporator 241: In the formula, Me is the mass of the metal material used in evaporator 241, in kg; Me,w is the mass of the cooling water inside evaporator 241, in kg; Tchill,in and Tchill,out are the inlet and outlet water temperatures of evaporator 241, in K; and mchill is the flow rate of the cooling medium in evaporator 241, in m3 / h.

[0035] Based on the above balance equation, let the heat source temperature, i.e. the outlet temperature of the tubular heat exchanger 12, be 65℃, its return water temperature be 15℃, and the temperature difference be ΔT=50K.

[0036] If the required cooling capacity of cabinet 1 is 100kW and the coefficient of performance (COP) is 0.5, then the output driving heat is 200kW, and the cooling water in the cooling tower needs to absorb 300kW of heat.

[0037] The total return water flow rate of the heat exchange pipeline in cabinet 1 is mw=300 / (cp,w×ΔT)=1.43kg / s; The high-temperature heat source from the heat exchange pipeline of cabinet 1 is cooled in two stages in this invention, namely, it is first cooled by the adsorption bed and then cooled by the evaporator 241. The temperature difference ΔT needs to be allocated using the following method: The temperature difference for cooling the adsorption bed is: The temperature difference for evaporator 241 is: Therefore, the inlet and outlet temperatures of the adsorption bed are 65℃ and 31.7℃, respectively, and the inlet and outlet temperatures of the hot water side of the evaporator 241 are 31.7℃ and 15℃, respectively. After the condensate from the cooling tower circulates, the temperature increases from 30℃ to 35℃. Therefore, the total condensate flow rate is mcool = 300 / (cp, w × 5) = 14.3 kg / s. Based on this, the dimensional parameters of the main components can be obtained, including the silica gel in the adsorption bed with a mass of about 200 kg and a heat exchange area of ​​about 50 m2, the evaporator 241 with a heat exchange area of ​​about 13 m2 and a weight of about 85 kg, and the condenser 231 with a heat exchange area of ​​about 25 m2 and a weight of about 156 kg.

[0038] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A two-phase immersion adsorption cooling system for data centers, characterized in that: include, The cabinet (1) is connected to the adsorption cooling module (2), the sensor module and the controller module; The cabinet (1) is equipped with a blade server (11), and a tubular heat exchanger (12) is installed above the blade server (11). The adsorption refrigeration module (2) is connected to the tubular heat exchanger (12) to realize the refrigeration cycle; the sensing module and the control module work together to control the operation of the system.

2. The data center two-phase immersion adsorption cooling system according to claim 1, characterized in that: The fluorinated liquid in the cabinet (1) absorbs the heat generated by the blade server (11) and then boils and evaporates to produce steam. The outside of the tubular heat exchanger (12) comes into contact with the fluorinated liquid vapor for heat exchange. The inside of the tubular heat exchanger (12) is circulating water. After absorbing heat, the circulating water enters the adsorption refrigeration module (2).

3. The data center two-phase immersion adsorption cooling system according to claim 2, characterized in that: The adsorption refrigeration module (2) consists of four chambers: a first adsorption chamber (21), a second adsorption chamber (22), a condensation chamber (23), and an evaporation chamber (24). The first adsorption chamber (21) and the second adsorption chamber (22) are arranged symmetrically. The condensation chamber (23) is located at the upper end of the first adsorption chamber (21) and the second adsorption chamber (22), and the evaporation chamber (24) is located at the lower end of the first adsorption chamber (21) and the second adsorption chamber (22).

4. The data center two-phase immersion adsorption cooling system according to claim 3, characterized in that: The upper ends of the first adsorption chamber (21) and the second adsorption chamber (22) are connected to the condensation chamber (23) for continuous condensation of the circulating working fluid of adsorption refrigeration. The lower ends of the first adsorption chamber (21) and the second adsorption chamber (22) are connected to the evaporation chamber (24) for continuous cooling of circulating water.

5. The data center two-phase immersion adsorption cooling system according to claim 4, characterized in that: The first adsorption chamber (21) is provided with a first adsorption bed (211), and the second adsorption chamber (22) is provided with a second adsorption bed (221). Both the first adsorption bed (211) and the second adsorption bed (221) are provided with serpentine coils.

6. The two-phase immersion adsorption cooling system for data centers according to claim 5, characterized in that: The tubular heat exchanger (12) is connected to the serpentine coils in the first adsorption bed (211) and the second adsorption bed (221) via a circulating pump (13) and multiple sets of three-way solenoid valves, respectively.

7. The two-phase immersion adsorption cooling system for data centers according to claim 6, characterized in that: The tubular heat exchanger (12) is connected to a serpentine coil and is used to heat or cool the first adsorption bed (211) or the second adsorption bed (221). The first adsorption bed (211) and the second adsorption bed (221) are used to adsorb and desorb the circulating working fluid.

8. The two-phase immersion adsorption cooling system for data centers according to claim 7, characterized in that: The condensing chamber (23) includes a condenser (231), and a liquid collection tank (232) is provided below the condenser (231). The condenser (231) is used to condense the gaseous working fluid from the adsorption chamber. The liquid collection tank (232) of the condensing chamber (23) is connected to the evaporation chamber (24) through a liquid guide pipe. An evaporator (241) is provided in the evaporation chamber (24).

9. The two-phase immersion adsorption cooling system for data centers according to claim 8, characterized in that: The first adsorption chamber (21) is provided with a first electromagnetic valve (212) at its upper end, the second adsorption chamber (22) is provided with a second electromagnetic valve (222) at its upper end, the evaporation chamber (24) is provided with a third electromagnetic valve (242) between the first adsorption chamber (21), and the evaporation chamber (24) is provided with a fourth electromagnetic valve (243) between the second adsorption chamber (22).

10. The two-phase immersion adsorption cooling system for data centers according to claim 8 or 9, characterized in that: The sensing module is used to obtain the adsorption state of the adsorption bed and the temperature of the cabinet (1), and the control module is used to continuously control the opening and closing of each valve to realize the continuous switching of heating or cooling between the first adsorption bed (211) and the second adsorption bed (221).

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